Grimes Rainfall Forecast

Today 26 Sep
100%
Sun 27 Sep
50%
Mon 28 Sep
10%
Tue 29 Sep
80%
Wed 30 Sep
70%
Thu 1 Oct
60%
Fri 2 Oct
30%

Grimes Rainfall Statistics

September Rainfall

Ankeny Regional Airport (10.6 miles)

Total Rainfall 2026
36.6in
Daily Average 2026
0.1in
Wettest Day 20 July, 2026
3.1in
Wet Days 2026
75/269 (28%)
Total Rainfall August
2.8in
Daily Average August
0.1in
Wettest Day 13 August, 2026
1.4in
Wet Days August
10/31 (32%)
Total Rainfall September
7.7in
Daily Average September
0.3in
Wettest Day 15 September, 2026
2.4in
Wet Days September
15/26 (58%)

Climate (2021–2025)

Ankeny Regional Airport (10.6 miles)

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Annual Average 2021–2025
19.7in
Monthly Average 2021–2026
2in
Daily Average 2021–2026
0.1in
Wettest Day 20 July, 2026
3.1in

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