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:

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:

• the altitude (the higher you are the cooler the temperature);
• the humidity level (rain cools the temperature down);
• the terrain type (exposed areas suffer more extreme temperatures than sheltered areas);
• the wind direction (a hot wind will raise the temperature, while a cold wind will lower it);
• the latitude (i.e. how far the area is from the equator - the further away, the cooler the temperature);
• how close the area is to the sea (sea areas tend to be milder than land-locked areas);
• the season (winter is colder than summer, with the effect more pronounced away from the equator); and
• the wind strength (unless the temperature is already hot, a strong wind will lower the effective temperature through wind chill).

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:

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:

Definitions:

• Polar means at latitudes of between 70 degrees and the pole (90 degrees);
• Cold means at latitudes of between 50 degrees and 70 degrees;
• Temperate means at latitudes of between 30 degrees and 50 degrees;
• Tropical means at latitudes of between 10 degrees and 30 degrees;
• Equitorial means at latitudes of between the equator (0 degrees) and 10 degrees;
• Oceanic means at sea, on the coast or on small islands (i.e. within 10 kilometres of the sea);
• Coastal means on land but in an area where the weather is influenced by the sea (e.g. more than 10 kilometres but less than 300 kilometres from a large sea or ocean); and
• Continental means on land in an area uninfluenced by the sea (e.g. more than 300 kilometres from any large sea or ocean).

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):