Random Weather

 Need to determine the weather randomly...I've got you covered.

1D20	Spring	Summer	Autumn	Winter
1	Storm	Unseasonably Cold & Wet	Unseasonably Cold & Wet/snow	Storm
2	Unseasonably Cold & Wet/snow	Temperate & Wet	Storm	Snow
3	Cold and dry	Temperate & Wet	Storm	Snow
4	Cold and dry	Overcast & Temperate	Storm	Snow
5	Cold and dry	Overcast & Temperate	Cold & wet	Cold & wet
6	Temperate & Wet	Overcast & Temperate	Cold & wet	Cold & wet
7	Temperate & Wet	Sun and showers	Cold & wet	Cold & wet
8	Overcast & Temperate	Sun and showers	Temperate & Wet	Cold & wet
9	Overcast & Temperate	Warm and fine	Temperate & Wet	Cold & wet
10	Overcast & Temperate	Warm and fine	Temperate & Wet	Overcast & cold
11	Sun and showers	Warm and fine	Temperate & Wet	Overcast & cold
12	Sun and showers	Warm and fine	Overcast & Temperate	Overcast & cold
13	Sun and showers	Warm and fine	Overcast & Temperate	Overcast & cold
14	Sun and showers	Warm and fine	Overcast & Temperate	Overcast & cold
15	Warm and fine	Warm and fine	Overcast & Temperate	Cold and fine
16	Warm and fine	Warm and fine	Warm and fine	Cold and fine
17	Warm and fine	Warm and fine	Warm and fine	Cold and fine
18	Warm and fine	Warm and fine	Warm and fine	Cold and fine
19	Warm and fine	Storm	Warm and fine	Overcast & Temperate
20	Unseasonably Hot	Heatwave	Unseasonably Hot	Unseasonably Warm