Pokemon GO Weather Boost Guide: Every Type & Strategy

Most Pokemon GO players know weather boost exists – but few actually plan around it. They catch whatever spawns and maybe notice the blue spinning rings. That’s leaving real value on the table: stardust, XL candy, higher-IV catches, and faster raid wins all shift meaningfully depending on what the sky is doing when you play.

This guide covers everything: the four distinct mechanics behind the boost, a complete type-to-weather mapping table, per-weather priority lists for what’s actually worth catching, raid strategy frameworks, and a few angles on the weather system that almost no guide bothers to explain.

What Weather Boost Actually Does – Four Mechanics

Weather boost isn’t one thing – it’s four separate systems stacked on top of each other. Most players only know the first two.

1. Higher-Level Wild Spawns (+5 Levels)

Wild Pokemon normally spawn between level 1 and level 30. Weather-boosted Pokemon spawn in the level 25-35 range. That level 35 cap matters because a higher-level catch needs fewer power-ups to reach battle-ready status, saving you stardust and candy. [1]

2. Stardust Bonus (+25%)

Every weather-boosted catch earns 25% more stardust – 125 instead of the standard 100 for common Pokemon. Stack a Star Piece on top and that becomes 187 stardust per catch. Over a 30-minute session in the right weather, the difference compounds significantly. [1]

3. Guaranteed IV Floor (4/4/4 Minimum)

Wild Pokemon normally have IVs ranging from 0 to 15 in each stat, meaning a 0/0/0 catch is always possible. Weather-boosted Pokemon are guaranteed at least 4 in every stat – Attack, Defense, and HP. [1] This doesn’t mean high IVs, but it removes the absolute worst-case floor. The practical value: if you catch a rare weather-boosted Pokemon (or a shiny), it will never have completely abysmal stats.

4. Move Power Boost (+20%) in Battles

Any attack that matches the current weather type deals 20% more damage in raids and gym battles. This is the mechanic that makes weather tactically interesting for raid teams – more on that in the raid section below. [2]

Visual identifier: Weather-boosted wild Pokemon have blue spinning rings around them both on the map and in the catch screen. If you see those rings, you know you’re looking at a higher-level, higher-floor Pokemon.

Complete Weather Type Chart

There are 7 weather conditions in Pokemon GO, and all 18 Pokemon types are distributed across them. [1]

A few things worth noticing: Fog is the rarest weather condition in many climates, which makes Ghost and Dark-type hunting naturally harder for players in dry regions. Rainy and Windy pack the most raid-relevant types (Electric, Dragon). And dual-type Pokemon – covered in the next section – can actually be boosted by two different weather conditions.

Dual-Type Pokemon: Two Weather Windows

This is the angle almost nobody talks about. When a Pokemon has two types, it gets weather-boosted by either weather condition that matches either of its types. That means some of the most valuable Pokemon in the game have two separate weather windows where you’ll find them at higher levels and with higher spawn rates.

The combinations worth knowing about:

• Gible (Dragon/Ground) – boosted in Windy (Dragon) AND Sunny (Ground). Garchomp is one of the best Dragon and Ground raid attackers in the game. Gible is normally rare – two weather windows is a meaningful advantage.
• Beldum (Steel/Psychic) – boosted in Snow (Steel) AND Windy (Psychic). Metagross is S-tier. Beldum requires 125 candy to fully evolve, making every extra catch matter.
• Swinub (Ice/Ground) – boosted in Snow (Ice) AND Sunny (Ground). Mamoswine is the top Ice attacker in the game and excellent on Ground. Two windows for one of the best attackers available.
• Rhyhorn (Rock/Ground) – boosted in Partly Cloudy (Rock) AND Sunny (Ground). Rhyperior is competitive in both Rock and Ground raid matchups.
• Larvitar (Rock/Dark) – boosted in Partly Cloudy (Rock) AND Fog (Dark). Tyranitar is top-tier. Two weather windows for arguably the best budget raid attacker.
• Ralts (Psychic/Fairy) – boosted in Windy (Psychic) AND Cloudy (Fairy). Gardevoir is the best Fairy attacker in the game. Ralts has two catches windows.
• Snover (Grass/Ice) – boosted in Sunny (Grass) AND Snow (Ice). Abomasnow is a solid Ice attacker.

Best Pokemon to Target in Each Weather

Not every spawn is worth equal effort. Here’s what to prioritise in each weather condition and why – focusing on Pokemon whose evolved forms are genuinely useful in raids and PvP, not just things that happen to be boosted.

Sunny / Clear – Fire, Grass, Ground

Best targets: Charmander (Charizard is a strong Fire attacker; Mega Charizard Y is S-tier in Fire raids), Rhyhorn (see dual-type above – Rhyperior is excellent), Gible (if it spawns – this is one of the best weather windows for it). Grass-type spawns are plentiful but their evolved forms are less raid-dominant – catch for stardust rather than candy investment.

Partly Cloudy – Normal, Rock

Best targets: Larvitar – this is the primary Partly Cloudy priority. Tyranitar’s candy is always worth farming. Rhyhorn also appears here (Rock/Ground, remember – two windows). I’ve spent entire Partly Cloudy afternoons hunting Larvitar specifically; it’s the weather condition that makes endgame Tyranitar candy feel actually achievable. Normal-type spawns (Snorlax when it appears) are worth catching for the stardust and XL Candy.

Cloudy – Fairy, Fighting, Poison

Best targets: Timburr (Conkeldurr is the better Fighting raid attacker over Machamp – Cloudy is the time to farm it), Machop (Machamp is still solid and easy to evolve), Ralts (see dual-type above – Gardevoir candy). Riolu occasionally spawns in Cloudy weather as a Fighting type – Lucario is excellent in both raids and PvP, so grab it when it appears.

Rainy – Bug, Electric, Water

Best targets: Electabuzz / Elekid (Electivire is a top Electric attacker for Water and Flying legendary raids), Feebas (Milotic is competitive in PvP Ultra and Great League – and Feebas requires 20 km as your buddy to evolve, making every extra candy genuinely valuable), Magikarp (Gyarados still has raid utility). Joltik is Bug/Electric – double-boosted in Rainy weather and a fun bonus when you find one.

Windy – Dragon, Flying, Psychic

Best targets: Bagon (Salamence is a top Dragon attacker – Bagon is rare enough that Windy weather is the main wild candy source for most players), Dratini (Dragonite is a solid budget Dragon attacker and appears more commonly), Gible (also boosted here as Dragon/Ground – see dual-type section), Beldum (also boosted here as Steel/Psychic). Ralts is also worth catching here for Gardevoir candy.

Snow – Ice, Steel

Best targets: Swinub (Mamoswine is S-tier Ice and Ground – Snow is the prime Swinub window; also boosted in Sunny as Ground/Ice dual-type), Beldum (Metagross is S-tier; Snow is the primary weather window since Beldum appears more reliably here than in normal conditions). Snorunt spawns more in Snow weather – Froslass has niche PvP relevance.

Fog – Dark, Ghost

Best targets: Larvitar (Dark/Rock – two weather windows, remember), Gastly (Gengar is a competitive Ghost/Poison attacker), Houndour (Houndoom is a decent Dark attacker; also boosted in Sunny as Dark/Fire dual-type). Sableye (Dark/Ghost – doubly boosted in Fog) is a strong Great League pick and worth catching when it appears.

Raid Strategy: When Weather Helps and When It Doesn’t

The 20% move power boost is where weather becomes tactically interesting – and where players who don’t think it through get caught out. Weather can help you, hurt you, or do both simultaneously depending on the raid boss and your counter team.

Pure Benefit: Your Counters Are Boosted, Boss Isn’t

Fighting Entei or Moltres (Fire type) during Rainy weather is close to ideal. Your Water-type counters get +20% damage from the Rainy boost. Entei’s Fire-type moves don’t get a boost – Fire is boosted by Sunny, not Rainy. You deal more damage; the boss deals standard damage. This is the best-case scenario.

Double-Edged: Both Sides Are Boosted

Fighting Kyogre (Water) during Rainy weather is the example that trips up players most often. Rainy weather boosts Water, Electric, and Bug. Your Electric-type counters (Raikou, Electivire, Magnezone) get +20% – that’s good. But Kyogre’s Water-type moves also get +20% – and that’s meaningful damage on top of Kyogre already being a hard fight. Whether this is a net positive depends on your team’s bulk and how many players you have in the raid. I’ve been caught out by underestimating this more than once – a fainted attacker contributes nothing, so the extra incoming damage matters.

The framework: if weather boosts your counter type but NOT the boss’s type, it’s pure benefit. If it boosts both, factor in whether your team can absorb the increased incoming damage before deciding how aggressively to go.

Remote Raids – The Location Mismatch

The weather at the gym’s location determines the raid boost – not your location. If you join remotely from across town or another area, the weather conditions there apply. You can see the weather icon in the raid lobby before joining. This is easy to forget when you’re planning counters at home and your local weather is different from the gym’s. [2]

Boosted Boss CP – What It Means for Catching

Weather-boosted raid bosses appear at Level 25 versus the standard Level 20. Their catch CP is visibly higher – if you’ve caught a Pokemon of that species before and the CP seems unusually high, that’s weather boost. The trade-off: the boss is harder to beat, but a weather-boosted catch saves you more stardust and candy to reach battle-ready power levels. For rare legendaries, that’s a meaningful upside. Our raid guide covers the full tier system and team-building in depth.

Stardust and XL Candy: The Economy Angles

The +25% stardust bonus is well-known, but two specific applications are worth calculating properly.

Star Piece Stacking

A weather-boosted catch earns 125 stardust base. Activate a Star Piece (+50%) and that becomes 187 stardust per catch. In a high-spawn area running a 30-minute Star Piece window, the difference between weather-boosted and non-boosted catching is substantial. Our stardust farming guide covers this calculation in full and ranks every stardust source by efficiency – weather-boosted mass catching consistently ranks near the top when combined with Star Pieces. [3]

XL Candy From Level 35 Catches

This is the angle almost no weather boost guide covers. Pokemon caught at Level 31 or higher have a chance to award XL Candy in addition to regular candy. Weather-boosted Pokemon spawn up to Level 35 – meaning every weather-boosted catch is a passive XL Candy opportunity. [4]

This matters most for the high-priority dual-type Pokemon listed earlier: Bagon, Beldum, Gible, Larvitar, and Swinub all require large amounts of XL Candy to reach Level 50. The combination of more targeted spawns in boosted weather PLUS Level 35 catch levels PLUS XL Candy chance makes weather grinding meaningfully more efficient for building endgame attackers than non-boosted casual catching.

The math isn’t dramatic per individual catch – XL Candy drops are probabilistic, not guaranteed. But across a dedicated weather session targeting 50-100 rare Pokemon, the cumulative XL Candy gain is noticeably better than a comparable non-boosted session.

Weather-Exclusive Pokemon Mechanics

Two Pokemon in the game have special forms tied directly to weather: Castform and Cherrim.

Castform changes its entire form and type based on current weather: Fire-type Sunny Castform in Sunny weather, Water-type Rainy Castform in Rainy weather, and Ice-type Snowy Castform in Snow weather. In all other conditions, it’s Normal type. Castform isn’t a competitive battler – its base stats are too low – but its weather-activated forms make it a satisfying collector target. Look for it in weather-specific spawns during its respective conditions.

Cherrim has two forms: Overcast and Sunshine. Sunshine Cherrim appears in Sunny weather. In the main Pokemon games, Sunshine Cherrim’s ability gave it enhanced stats – in Pokemon GO it’s primarily cosmetic, but it makes for good weather-specific hunting.

Weather Ball – The Only Type-Changing Move

Every move in Pokemon GO has a fixed type. Every move except Weather Ball. [5]

Weather Ball is a Charged Move that changes type based on current weather. It has three boosted states:

• Fire type in Sunny / Clear weather
• Water type in Rainy weather
• Ice type in Snow weather
• Normal type in all other conditions (Partly Cloudy, Cloudy, Windy, Fog)

In its boosted forms, Weather Ball gets stacked bonuses: the standard STAB multiplier (if the user’s type matches) plus the 20% weather damage bonus. A Fire-type Weather Ball used by a Fire-type Pokemon in Sunny weather carries both modifiers simultaneously.

Castform is the primary user of Weather Ball in Pokemon GO, and understanding the mechanic helps explain why weather conditions create type-specific battle windows beyond just spawn rate increases. It’s the clearest illustration of how deeply weather is woven into the game’s design – it’s not just a spawn multiplier but a genuine tactical layer.

Planning with Real-World Weather Forecasts

Pokemon GO uses real-time weather data from an API based on your GPS location, updating roughly every hour at the top of the hour. This creates a planning opportunity that most casual players ignore entirely. [1]

The 24-Hour Window: Before planning a stardust session, a raid day, or a specific Pokemon hunt, check your local weather forecast. If rain is forecast for tomorrow afternoon, that’s your window for Electric, Bug, and Water-type targets. A clear sunny stretch means Gible, Charmander, and Rhyhorn runs. A cold snap (Snow) is your Beldum and Swinub window – arguably the most valuable weather condition for endgame candy farming.

The Hourly Transition: Weather updates at the top of each hour. Existing wild Pokemon on the map stay until their individual despawn timers expire (usually 30-60 minutes), so you may see old-weather spawns for a while after conditions shift. New weather-boosted spawns will populate as the pool refreshes.

Weather Accuracy Caveat: Niantic explicitly notes that “weather information in Pokémon GO might occasionally be incorrect or unavailable at some times or in some places.” [1] If your in-game weather doesn’t match the sky above you, this is expected – the game operates on a lag and classifies weather by GPS coordinate zones. The reliable rule: trust the in-game weather icon over your real-world observation. The boost applies to whatever the game’s API says, not what it looks like outside.

Common Issues and Edge Cases

“I’m not seeing boosted spawns even though the weather changed” – Spawns don’t swap instantly. Existing wild Pokemon stay until their despawn timers expire. New weather-boosted spawns appear gradually as the pool refreshes. Give it 10-15 minutes after a weather transition before judging the new spawn composition.

“The high-CP catch has bad IVs” – Higher CP reflects the higher spawn level (up to 35), not necessarily better individual IVs. The 4/4/4 IV floor removes the absolute worst stats, but a weather-boosted Pokemon is not guaranteed to have good IVs. Always appraise before investing stardust.

“The weather near me looks different across the map” – Pokemon GO divides the map into hexagonal weather cells. If you’re near the border of two cells, adjacent areas may show different weather. This explains why players on the same street can sometimes see different in-game weather conditions or different boosted spawns. Moving a short distance into a different cell changes your boost accordingly.

“My remote raid weather didn’t match what I expected” – Expected behavior, as covered above. The weather icon during a remote raid reflects the gym’s location, not yours. Check it in the raid lobby before committing your team build.

Key Takeaways

Weather boost rewards players who observe and plan. The stardust bonus is real but secondary – the primary value is in the combination of higher-level catches for XL Candy, the 4/4/4 IV floor on rare Pokemon, and the raid move-power bonus that can turn a difficult fight into a clean one.

The dual-type angle is the biggest gap in how most players use weather boost. Gible, Beldum, Swinub, and Larvitar each have two weather windows – knowing both means you’re never waiting as long for those priority catches. Snow weather for Beldum, Windy for the other half of the year. Partly Cloudy for Larvitar, Fog for the rest. This compounds hard over a season of regular play.

Check the forecast before heading out. It takes 30 seconds and changes what you prioritise for the next few hours. Most players who get ahead in endgame candy and stardust aren’t grinding harder – they’re grinding smarter, during the windows that actually matter for what they’re building.

Sources

[1] Niantic Help Center. Weather Boosts. Niantic

[2] The Pokemon Company. Work with Weather in Pokemon GO. Pokemon.com

[3] GO Hub. Pokemon GO Weather System Explained: IVs, CP Boost, Increased Spawns. Pokemon GO Hub

[4] GO Hub. Guide to Weather Effects in Pokemon GO. Pokemon GO Hub

[5] GO Hub. How Weather Affects Moves in Pokemon GO. Pokemon GO Hub