The weather is broken (especially winter)

[vetall812]

Describe the bug

Some of weather condition are never appear on the overmap:

• flurries
• snow storm

Other weather condition appear when they aren't possible:

• drizzle with temperature below 0C

Attach save file

N/A
you can recreate it easily

Steps to reproduce

1. Spawn yourself a pair of binoculars
2. Debug mutate night vision
3. Skim through the whole year day by day and watch the sky

Expected behavior

No liquid precipitation when temperature below 0C:

• Snow storm instead of rain storm in winter
• Flurries instead of light drizzle
• Snowing instead of drizzle/rain

Screenshots

In the middle of the winter (45 day of winter) and midnight temperature is -20C
But it is... drizzle?

Versions and configuration

• OS: Windows
  • OS Version: 10.0.19045.4529 (22H2)
• Game Version: cdda-experimental-2024-06-28-1704 d18e0a0 [64-bit]
• Graphics Version: Tiles
• Game Language: System language []
• Mods loaded: [
  Dark Days Ahead [dda],
  Disable NPC Needs [no_npc_food],
  Portal Storms Ignore NPCs [personal_portal_storms],
  Slowdown Fungal Growth [no_fungal_growth]
  ]

Additional context

No response

[ZhilkinSerg]

There is just no temperature condition for a drizzle - https://github.com/CleverRaven/Cataclysm-DDA/blob/master/data/json/weather_type.json

[ZhilkinSerg]

Required weather for flurries is flurries itself, which sounds wrong.

[ZhilkinSerg]

Required weathers for snowstorm are thunder and lightning, which also sounds odd.

[vetall812]

@Ramza13 , could you please take a look?

[Void-Seeker]

Drizzle can kinda happen with the surface temperature slightly below zero, which result in ice crust accumulating on all surfaces. That doesn't happen when temperature is -14 °C, of course.