Brown Island Rainfall Forecast

Today 23 Sep
10%
Thu 24 Sep
90%
Fri 25 Sep
85%
Sat 26 Sep
5%
Sun 27 Sep
15%
Mon 28 Sep
25%
Tue 29 Sep
35%

Brown Island Rainfall Statistics

September Rainfall

Friday Harbor Airport (1.2 miles)

Total Rainfall 2026
10.9in
Daily Average 2026
0.04in
Wettest Day 12 January, 2026
0.8in
Wet Days 2026
73/266 (27%)
Total Rainfall August
0.6in
Daily Average August
0.02in
Wettest Day 29 August, 2026
0.4in
Wet Days August
3/31 (10%)
Total Rainfall September
0.1in
Daily Average September
0in
Wettest Day 2 September, 2026
0.1in
Wet Days September
2/23 (9%)

Climate (2021–2025)

Friday Harbor Airport (1.2 miles)

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Annual Average 2021–2025
20.6in
Monthly Average 2021–2026
1.8in
Daily Average 2021–2026
0.1in
Wettest Day 15 November, 2021
1.9in

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