Is it dark enough to spawn monsters, or bright enough to make them despawn?


No. Rainy weather reduces day-time light-levels to 12 at mid-day, which is not low enough to spawn monsters. This 3-point decrease does mean that, as twilight falls, it will be darker sooner and monsters will spawn just that bit earlier—but of course, it's not "day" anymore at that point.

However! Thunderstorms have a light level of 7 at mid-day, meaning that monsters will spawn then. That's just one more reason to not go walking around when lightning is crashing down.

  • Well this helps because im in hardcore and all my survival worlds mobs spawn in rain
    – user56336
    Oct 1 '13 at 17:01
  • A very good answer, since it describes not only when darkness does take effect mechanically, but specifies that thunderstorms are even darker than regular rain, which I did not even know!
    – Zibbobz
    Oct 1 '13 at 18:03

Notch said on twitter:

MUOAHAHA! Thunder Storms lower the brightness. That means daytime monsters during storms. This is freakily atmospheric.


So that means monsters will spawn during a storm (thunder and lightning) in the day, but not when it is only raining.

  • 4
    Also, monsters only burn in complete sunlight (rain decreases the light level by one I believe), so the monsters won't burn up.
    – Kevin Yap
    May 6 '11 at 21:46

They can spawn in rain. I know because on my current world it is raining (but there is no thunder or lightning) and hostile mobs are spawning.

  • 1
    Are you under a lot of trees? That will make it darker. Dec 23 '12 at 0:00

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