Potomac River - Cornfield Harbor Rainfall Forecast

Today 20 Sep
15%
Mon 21 Sep
30%
Tue 22 Sep
70%
Wed 23 Sep
60%
Thu 24 Sep
45%
Fri 25 Sep
35%
Sat 26 Sep
15%

Potomac River - Cornfield Harbor Rainfall Statistics

September Rainfall

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

Total Rainfall 2026
16.5in
Daily Average 2026
0.1in
Wettest Day 10 January, 2026
1.3in
Wet Days 2026
65/263 (25%)
Total Rainfall August
3.5in
Daily Average August
0.1in
Wettest Day 17 August, 2026
1.1in
Wet Days August
12/31 (39%)
Total Rainfall September
0.8in
Daily Average September
0.05in
Wettest Day 4 September, 2026
0.4in
Wet Days September
5/20 (25%)

Climate (2021–2025)

St. Inigoes, Webster Field, Naval Electronic Systems Engineering Activity (6.8 miles)

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Annual Average 2021–2025
35.4in
Monthly Average 2021–2026
2.6in
Daily Average 2021–2026
0.1in
Wettest Day 10 December, 2023
2.5in

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