Potomac Rainfall Forecast

Today 17 Jan
60%
Sun 18 Jan
35%
Mon 19 Jan
5%
Tue 20 Jan
No Rain
Wed 21 Jan
No Rain
Thu 22 Jan
20%
Fri 23 Jan
20%

Potomac Rainfall Statistics

January Rainfall

Gaithersburg - Montgomery County Airport (10.6 miles)

Total Rainfall 2026
1in
Daily Average 2026
0.1in
Wettest Day 10 January, 2026
1in
Wet Days 2026
2/17 (12%)
Total Rainfall December
1.3in
Daily Average December
0.1in
Wettest Day 2 December, 2025
0.9in
Wet Days December
4/31 (13%)
Total Rainfall January
1in
Daily Average January
0.1in
Wettest Day 10 January, 2026
1in
Wet Days January
2/17 (12%)

Climate (2010–Present)

Gaithersburg - Montgomery County Airport (10.6 miles)

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Annual Average 2021–2025
26in
Monthly Average 2021–2025
2.2in
Daily Average 2021–2026
0.1in
Wettest Day 23 June, 2023
2.6in

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