Grass Lake Rainfall Forecast

Today 20 Sep
15%
Mon 21 Sep
35%
Tue 22 Sep
No Rain
Wed 23 Sep
15%
Thu 24 Sep
65%
Fri 25 Sep
20%
Sat 26 Sep
30%

Grass Lake Rainfall Statistics

September Rainfall

Watertown, Watertown Municipal Airport (16.2 miles)

Total Rainfall 2026
15.2in
Daily Average 2026
0.1in
Wettest Day 18 September, 2026
1.4in
Wet Days 2026
73/263 (28%)
Total Rainfall August
0.2in
Daily Average August
0.01in
Wettest Day 13 August, 2026
0.1in
Wet Days August
4/31 (13%)
Total Rainfall September
3in
Daily Average September
0.2in
Wettest Day 18 September, 2026
1.4in
Wet Days September
7/20 (35%)

Climate (2021–2025)

Watertown, Watertown Municipal Airport (16.2 miles)

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Annual Average 2021–2025
23.7in
Monthly Average 2021–2026
1.9in
Daily Average 2021–2026
0.1in
Wettest Day 9 October, 2021
2.2in

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