San Juan Island - Grandmas Cove Rainfall Forecast

Today 27 Mar
5%
Sat 28 Mar
No Rain
Sun 29 Mar
40%
Mon 30 Mar
30%
Tue 31 Mar
20%
Wed 1 Apr
55%
Thu 2 Apr
45%

San Juan Island - Grandmas Cove Rainfall Statistics

March Rainfall

Friday Harbor Airport (3.7 miles)

Total Rainfall 2026
7.6in
Daily Average 2026
0.1in
Wettest Day 12 January, 2026
0.8in
Wet Days 2026
43/86 (50%)
Total Rainfall February
1.1in
Daily Average February
0.04in
Wettest Day 1 February, 2026
0.3in
Wet Days February
11/28 (39%)
Total Rainfall March
3.4in
Daily Average March
0.1in
Wettest Day 4 March, 2026
0.6in
Wet Days March
17/27 (63%)

Climate (2010–Present)

Friday Harbor Airport (3.7 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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