Evomon runs a live weather system that flips across the entire map every 15 minutes, and each pattern changes how a fight plays out turn by turn. Some weather buffs a specific element, others slowly drain any creature of the wrong type, so glancing at the sky before a boss or a long farming session is a genuine advantage.
Quick answer: There are five weather states. Sunny does nothing, Rain speeds up Water-types, Volcanic Eruption burns non-Fire-types, Sandstorm chips non-Rock/Earth-types, and Thunderstorm can Paralyse non-Electric-types. Match your team to the current weather before entering a hard fight.
Every Evomon weather event and its battle effect
| Weather | Effect in battle |
|---|---|
| Sunny | No battle effects. This is the default state of the world and the most common condition you will see. |
| Rain | Water-type Evomon gain a Speed boost each turn they stay on the field, letting them outspeed threats they would normally trail. |
| Volcanic Eruption | Every non-Fire-type on your team picks up a Burn stack each turn, so long fights get more punishing the longer they run. Lava Crag sits under this weather permanently. |
| Sandstorm | Any Evomon that is not a Rock or Earth-type takes passive damage every turn from the sand. |
| Thunderstorm | Any Evomon that is not an Electric-type risks Paralysis each turn, which lowers Speed and can make it lose its turn entirely. |
How the weather cycle works
The weather is global, not tied to a single island, and it rotates roughly every 15 minutes. Because the timer runs whether you are watching or not, a fight you start under Sunny can turn into a Sandstorm mid-session. Check the current condition before committing to a boss, a dungeon, or a long capture run so the effect does not catch your team off guard.
You will notice weather working when the on-field status ticks appear each turn. A Burn stack building on a non-Fire creature, sand chipping health, or a Paralysis proc slowing your Speed are all direct signs the active weather is hitting your team.
Which weather to prepare for
Volcanic Eruption: the most punishing weather
Volcanic Eruption is the one that ends unprepared teams. Every non-Fire-type on the field stacks Burn each turn, so damage keeps compounding through drawn-out battles. This is also the permanent weather at Lava Crag, so bring Fire-types or creatures that can absorb Burn before you farm there.
Thunderstorm: watch for lost turns
Thunderstorm threatens any team without Electric-types. Paralysis cuts Speed and can strip a full turn, which is enough to lose a close boss fight. Lead with Electric-type Evomon or ones that resist Paralysis when the storm is active.
Sandstorm: plan for shorter fights
Sandstorm quietly drains health from everything outside Rock and Earth-types every turn, which makes long engagements far more taxing. If your team lacks those types, pack extra healing items or aim to end fights quickly.
Rain and Sunny: the safe windows
Rain is the only weather that can work in your favor. Water-type teams gain Speed each turn, letting them outrun opponents they might otherwise lose the initiative against. Sunny is the neutral baseline with no effects at all, so it is the safest window for any composition and a good time to attempt fights where weather would otherwise be a liability.
The short version: is simple. Weather is a rolling 15-minute check that either helps your Water-types or slowly grinds down whatever creatures are the wrong element for the current pattern. Keep an eye on the sky, keep a Fire-type or Electric-type ready for the harsher rotations, and time your toughest fights for Sunny when you can.
