San Juan Island - Roche Harbor Rainfall Forecast

Today 31 Mar
50%
Wed 1 Apr
95%
Thu 2 Apr
20%
Fri 3 Apr
5%
Sat 4 Apr
No Rain
Sun 5 Apr
No Rain
Mon 6 Apr
15%

San Juan Island - Roche Harbor Rainfall Statistics

March Rainfall

Friday Harbor Airport (8.1 miles)

Total Rainfall 2026
7.7in
Daily Average 2026
0.1in
Wettest Day 12 January, 2026
0.8in
Wet Days 2026
45/90 (50%)
Total Rainfall February
1.1in
Daily Average February
0.04in
Wettest Day 1 February, 2026
0.3in
Wet Days February
11/31 (35%)
Total Rainfall March
3.5in
Daily Average March
0.1in
Wettest Day 4 March, 2026
0.6in
Wet Days March
19/31 (61%)

Climate (2010–Present)

Friday Harbor Airport (8.1 miles)

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Annual Average 2021–2025
20.6in
Monthly Average 2021–2026
1.7in
Daily Average 2021–2026
0.1in
Wettest Day 15 November, 2021
1.9in

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