int UI_get_weather()
Returns the current weather state. Return values are:
A numeric value indicating what the current weather is. Possible values are:
| CLEAR_WEATHER = 0 | No clouds, no precipitation. |
| SNOWING = 1 | Snowing. |
| RAIN = 2 | Raining |
| SPARKLE = 3 | Magical storm, causes magic to fail. |
| FOG = 4 | Nothing happens. |
| OVERCAST = 5 | Light cloud cover. |
| CLOUDY = 6 | Heavy cloud cover. |