The weather system has been greatly improved.
This update includes a larger variety of different weathers across the regions. This means that it could be raining in one place and scorching in another. Entering a different region will have a much quicker effect on the weather than before.
Extreme weather conditions such as thunderstorms or sandstorms will last far less: 1-6 in-game hours.
Daytime hours have been changed to 7AM - 8PM, nighttime hours to: 8PM - 7AM.
Weather forecast will no longer display overnight weather for simplicity reasons.