PokéSurvivor Weather

Ordinary weather becomes eligible after 120 run seconds. The weather system then counts down a 60-second check timer and rolls an 18% chance when that timer expires. On an uninterrupted normal run, the first roll is around minute three; minute two is the eligibility threshold, not a guaranteed weather announcement. Failed rolls lead to another check rather than ensuring an event at a fixed minute.

A normal event lasts a randomly chosen 55–75 seconds. The next check timer counts down while no weather is active, and normal random starts are blocked inside a rift arena or during the Judgment. Weather choice is weighted by the current biome: forest favors rain, cave favors fog and snow, and volcano favors sun and sandstorm. The five states are not equally likely in every location.

Weather fades in and out over three seconds. Its intensity runs from zero to one, and an affected attack uses 1 + (full-intensity multiplier − 1) × intensity. At half intensity, rain gives Water ×1.25, Electric ×1.1 and Fire ×0.75. At full intensity those become ×1.5, ×1.2 and ×0.5. An attack type without a modifier remains at ×1 throughout the transition.

The snow speed contribution also follows intensity: a non-Ice partner receives 1 − 0.1 × intensity. Half-intensity snow therefore gives ×0.95 movement speed, reaching ×0.9 at full strength. Judge an escape route using the active condition, especially as snow finishes fading in.

The weather system checks chip damage every two seconds, with damage active only above half intensity. For an unprotected living player, each eligible tick removes the greater of 1 HP or 1.2% of maximum HP. At 200 maximum HP, that is 2.4 HP per tick. The game applies it only when current HP is greater than the tick amount plus 1, so weather chip itself cannot knock you out. Enemy attacks can still finish a player whose HP has been lowered by weather.

Protection requires any one safe partner type: Rock, Ground or Steel for sandstorm, and Ice for snow. Regular vulnerable enemies also take chip damage, using 2% of their maximum HP plus 1 per eligible tick. Bosses are exempt from environmental chip damage; in co-op, the host applies it to living ordinary enemies. Unlike the protected player floor, those ordinary enemies can die from the weather tick. A storm can help clear enemies while still reducing your own safety margin.

A rift arena can force its own themed weather instead of using the ordinary random roll. Fire arenas use sun; Water and Electric arenas use rain; Ice arenas use snow; Ground and Rock arenas use sandstorm; Ghost arenas use fog. Other type arenas have no configured weather, including Steel and Fairy even though their attacks can benefit from sand or fog elsewhere. The forced weather is initialized for 135 seconds and is cleared when you leave, so the normal 55–75-second event duration is not a reliable arena countdown.

The Judgment clears existing weather when its encounter begins, and normal weather does not start while it is active. In co-op, the host decides ordinary weather and broadcasts the event to the room. Partners can experience the same storm differently because protection and slowdown depend on each partner's own types. Before entering a themed arena together, compare both the chosen attacks and each player's weather protection.