San Juan Island - Friday Harbor Rainfall Forecast

Today 7 Aug
No Rain
Sat 8 Aug
No Rain
Sun 9 Aug
No Rain
Mon 10 Aug
No Rain
Tue 11 Aug
No Rain
Wed 12 Aug
No Rain
Thu 13 Aug
No Rain

San Juan Island - Friday Harbor Rainfall Statistics

August Rainfall

Friday Harbor Airport (1.9 miles)

Total Rainfall 2026
10.3in
Daily Average 2026
0.05in
Wettest Day 12 January, 2026
0.8in
Wet Days 2026
69/219 (32%)
Total Rainfall July
0.8in
Daily Average July
0.02in
Wettest Day 16 July, 2026
0.3in
Wet Days July
5/31 (16%)
Total Rainfall August
0.04in
Daily Average August
0.01in
Wettest Day 1 August, 2026
0.04in
Wet Days August
1/7 (14%)

Climate (2021–2025)

Friday Harbor Airport (1.9 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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