San Juan Island - Friday Harbor Rainfall Forecast

Today 23 May
No Rain
Sun 24 May
20%
Mon 25 May
85%
Tue 26 May
5%
Wed 27 May
No Rain
Thu 28 May
5%
Fri 29 May
5%

San Juan Island - Friday Harbor Rainfall Statistics

May Rainfall

Friday Harbor Airport (1.9 miles)

Total Rainfall 2026
8.4in
Daily Average 2026
0.1in
Wettest Day 12 January, 2026
0.8in
Wet Days 2026
55/143 (38%)
Total Rainfall April
0.4in
Daily Average April
0.01in
Wettest Day 1 April, 2026
0.3in
Wet Days April
7/30 (23%)
Total Rainfall May
0.2in
Daily Average May
0.01in
Wettest Day 14 May, 2026
0.1in
Wet Days May
3/23 (13%)

Climate (2010–Present)

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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