Washington Rainfall Forecast

Today 14 Sep
35%
Tue 15 Sep
No Rain
Wed 16 Sep
No Rain
Thu 17 Sep
30%
Fri 18 Sep
30%
Sat 19 Sep
25%
Sun 20 Sep
30%

Washington Rainfall Statistics

September Rainfall

Rockland, Knox County Regional Airport (19.3 miles)

Total Rainfall 2026
19.6in
Daily Average 2026
0.1in
Wettest Day 23 June, 2026
3.5in
Wet Days 2026
91/257 (35%)
Total Rainfall August
0.4in
Daily Average August
0.01in
Wettest Day 3 August, 2026
0.2in
Wet Days August
9/31 (29%)
Total Rainfall September
0.7in
Daily Average September
0.1in
Wettest Day 10 September, 2026
0.3in
Wet Days September
5/14 (36%)

Climate (2021–2025)

Rockland, Knox County Regional Airport (19.3 miles)

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Annual Average 2021–2025
23.6in
Monthly Average 2021–2026
2.1in
Daily Average 2021–2026
0.1in
Wettest Day 23 June, 2026
3.5in

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