Illinois Natural History Survey Area Rainfall Forecast

Today 15 May
50%
Fri 16 May
70%
Sat 17 May
25%
Sun 18 May
5%
Mon 19 May
50%
Tue 20 May
85%
Wed 21 May
85%

Illinois Natural History Survey Area Rainfall Statistics

May Rainfall

Mattoon / Charleston, Coles County Memorial Airport (16.8 miles)

Total Rainfall 2025
13.5in
Daily Average 2025
0.1in
Wettest Day 4 April, 2025
2.9in
Wet Days 2025
43/135 (32%)
Total Rainfall April
7.7in
Daily Average April
0.3in
Wettest Day 4 April, 2025
2.9in
Wet Days April
13/30 (43%)
Total Rainfall May
2.3in
Daily Average May
0.2in
Wettest Day 3 May, 2025
1.3in
Wet Days May
6/15 (40%)

Climate (2010–Present)

Mattoon / Charleston, Coles County Memorial Airport (16.8 miles)

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Annual Average 2020–2024
36.6in
Monthly Average 2020–2025
3in
Daily Average 2020–2025
0.1in
Wettest Day 9 July, 2024
3.6in

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