Brown Island Rainfall Forecast

Today 18 Sep
No Rain
Fri 19 Sep
No Rain
Sat 20 Sep
90%
Sun 21 Sep
70%
Mon 22 Sep
30%
Tue 23 Sep
20%
Wed 24 Sep
30%

Brown Island Rainfall Statistics

September Rainfall

Friday Harbor Airport (1.2 miles)

Total Rainfall 2025
9.6in
Daily Average 2025
0.04in
Wettest Day 21 June, 2025
0.8in
Wet Days 2025
73/261 (28%)
Total Rainfall August
0.8in
Daily Average August
0.03in
Wettest Day 15 August, 2025
0.4in
Wet Days August
6/31 (19%)
Total Rainfall September
0.1in
Daily Average September
0in
Wettest Day 6 September, 2025
0.1in
Wet Days September
2/18 (11%)

Climate (2010–Present)

Friday Harbor Airport (1.2 miles)

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Annual Average 2020–2024
20.9in
Monthly Average 2020–2025
1.7in
Daily Average 2020–2025
0.1in
Wettest Day 21 December, 2020
2.5in

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