Gulf of the Farallones Marine Sanctuary Rainfall Forecast

Today 30 May
No Rain
Sun 31 May
No Rain
Mon 1 Jun
No Rain
Tue 2 Jun
No Rain
Wed 3 Jun
No Rain
Thu 4 Jun
5%
Fri 5 Jun
No Rain

Gulf of the Farallones Marine Sanctuary Rainfall Statistics

May Rainfall

Half Moon Bay Airport (11.8 miles)

Total Rainfall 2026
7.1in
Daily Average 2026
0.05in
Wettest Day 16 February, 2026
1.1in
Wet Days 2026
32/150 (21%)
Total Rainfall April
2.2in
Daily Average April
0.1in
Wettest Day 10 April, 2026
0.7in
Wet Days April
7/30 (23%)
Total Rainfall May
0.4in
Daily Average May
0.01in
Wettest Day 28 May, 2026
0.2in
Wet Days May
3/30 (10%)

Climate (2010–Present)

Half Moon Bay Airport (11.8 miles)

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Annual Average 2021–2025
20.4in
Monthly Average 2021–2026
1.8in
Daily Average 2021–2026
0.1in
Wettest Day 24 October, 2021
3.5in

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