5.2.1.4 Temperature

When determining the weather conditions, the temperature level is determined by rolling 3D (the temperature roll), adjusting for the season, terrain type, etc. and consulting the following table:

Adjusted temperature roll result Resulting day-time temperature level Resulting day-time temperature
Below zero 0 Ultra-cold, well below freezing point
0-6 1 Icy - around freezing point
7-14 2 Cold (e.g. 10 degrees centigrade)
15-21 3 Temperate (e.g. 20 degrees centigrade)
22-28 4 Hot (e.g. 30 degrees centigrade)
29-35 5 Very hot (e.g. 40 degrees centigrade)
Above 35 6 Intense heat (e.g. over 50 degrees centigrade)

The day-time temperature level will stay the same until the wind strength, wind direction or humidity level change, at which point a new temperature roll should be made to determine the new day-time temperature level.

The night-time temperature will be one temperature level lower than the day-time temperature level, unless the terrain type is exposed (e.g. mountains, desert, open plains) and there is very little cloud cover (i.e. humidity level is arid or dry), in which case the night-time temperature level will be two levels lower than the day-time temperature.

Modifiers to the temperature roll

There are significant modifiers to the temperature roll for:

Altitude

The altitude affects the temperature roll, with a modifier of -1 per 100 metres of altitude.

Humidity level

The humidity level should be deducted from the temperature roll for the purposes of determining the daytime temperature. Sheltered areas (i.e. forest, jungle) are subject to a minimum deduction of -3 (representing the canopy cover that the trees provide, even if there is no cloud cover).

Wind direction

The wind direction also affects the temperature roll result, as follows:

Wind direction Impact of wind direction
From the pole Deduct wind strength from temperature roll result
East or West None
From the equator Add wind strength from temperature roll result

Season, latitude and proximity to sea

The season affects the temperature roll as follows, depending on how far the location is from the equator and whether the area is continental or coastal:

Latitude Proximity to oceans Winter Spring/Autumn Summer
Polar Oceanic -17 -15 -12
Coastal -20 -17 -14
Continental -24 -20 -16
Cold
Oceanic -8 -4 -2
Coastal -10 -5 -1
Continental -13 -7 +0
Temperate Oceanic +1 +6 +11
Coastal +0 +6 +12
Continental -2 +6 +14
Tropical Oceanic +10 +12 +12
Coastal +10 +13 +14
Continental +10 +14 +16
Equatorial Oceanic +17 +17 +17
Coastal +19 +19 +19
Continental +21 +21 +21

Definitions:

Wind strength

Finally, the wind strength affects the temperature roll result, as follows (representing wind chill), depending on whether the terrain is exposed (e.g. mountains, open plains, desert, frozen wastes) or sheltered (e.g. forest, jungle):

Temperature roll result before adjusting for wind strength Sheltered terrain Exposed terrain
6 or below Deduct wind strength from temperature roll result Deduct twice wind strength from temperature roll result
7 to 28 Deduct half wind strength from temperature roll result Deduct wind strength from temperature roll result
29 or above None None