Weather

The weather is specific to each of 36 quadrants of the provinces, and changes every hour.

Weather calculation

season <- getSeason() # March = Spring = 0
for i <- 0, 36
   climate <- climates[i]
   variant <- <40% for 2, 20% for 1 and 3, 10% for 0 or 4>
   weather[i] <- weatherTable[climate*20 + season*5 + variant]

climates is a 36 1-byte values @4295E

weatherTable is 140 1-byte values @42990

Value mapping

0  clear
1  overcast, fog
2  rain
3  snow
4  snow overcast, fog
5  rain
6  same as 1?
7  snow overcast, if rnd()<16000 then fog (recalculate on each outside transition)

If rain and rnd()<24000, it is thunderstorm.

If fog and (day number & 8), it is heavy fog.

In terrain type 3 (different from climate above), there is raining instead of snow/snow overcast.

Rain in cities uses W tileset. Overcast and rain in the wilderness use R tileset.

When it is snowing or snow overcast, the following NPCs are missing from cities: fire-eater, prostitutes, and snake enchanter (bugged in the original game).