Ported to 0.18 from https://mods.factorio.com/mod/moweather
Forum: https://forums.factorio.com/viewtopic.php?f=63&t=18281

MoWeather is a mod developed to improve the atmosphere of factorio, by simulating weather systems that effect the world. Solar power users beware!

Features:
Weather Systems: MoWeather's main feature. Types of weather in-game, that effect the game world. Each weather type has its own percentage to happen. For example, cloudy weather has a higher chance to happen then it being very windy.

Sound: Some of the weather types include sound while they happen.

Weather:
Clear: Basicly What factorio is without MoWeather.
Cloudy: The clouds form a overcast casing the day to be darker, this causes solar panels to generate less power.
Windy: The winds pick up allowing pollution to be carried farther from your factory.
Thunderstorm: The sky darkens, and the wind picks up. And the sky's pour down on you.
Rainstorm: It starts to rain, what else is there to say.

Warning: Ive just been made aware that uninstalling MoWeather causes the daylight to freeze in saves you used it on, Ill be looking into a way to fix this issue. Sorry for any inconveniences this causes.