Mattoon Weather Information
Mattoon historical weather data by month.
Chance Of Sunshine
Annual chance of sunshine: 51.18%
Month
% Sunny
Clear Days
Partly Cloudy Days
Cloudy Days
January
46.88%
8
7
17
February
48.28%
7
7
15
March
48.39%
7
8
16
April
46.67%
6
8
16
May
54.84%
7
10
14
June
61.29%
8
11
12
July
64.52%
8
12
11
August
61.29%
8
11
12
September
56.67%
8
9
13
October
50.00%
7
8
15
November
36.67%
5
6
19
December
38.71%
6
6
19
Temperature
Rainfall
Sum Of Heating & Cooling Degree Days
