Quick answer
Yes to both. Transport Fever 3 has dynamic weather and a full day-night cycle, and its maps span four climate zones.[1] Wikipedia notes this is the first fully featured day-night cycle in the series, with dynamic lighting and physical skies.[2]
What is confirmed
- Weather and time of day: the store says dynamic weather and the day-night cycle let you see your world "from sunny mornings to rainy, clouded afternoons".[1]
- Four climate zones: temperate valleys, subarctic swamps, desert plains and tropical islands.[1]
- Mixed biomes on one map: the new node-based map generation blends biomes, for example swamps into coastlines or deserts into canyons.[2]
- Ambient world: the Dev Blog highlights list dynamic weather, time of day, lighting and ambient sound together.[3]
Does weather affect gameplay?
The official material describes weather and day-night as atmosphere ("countless moods"). It does not say that rain or night slows vehicles or changes demand.[1] Climate zones are different: the store says each one "brings unique challenges" and demands "a fresh approach to your transportation strategy".[1] We will add details once players document what changes in practice.
Are there seasons or snow?
Neither the store page nor the developer highlights mention seasons.[1][3] Subarctic areas exist as a climate zone, but we have no source for seasonal snow cycles.
