San Bruno Mountain State Park Rainfall Forecast

Today 15 Apr
5%
Thu 16 Apr
No Rain
Fri 17 Apr
No Rain
Sat 18 Apr
10%
Sun 19 Apr
35%
Mon 20 Apr
45%
Tue 21 Apr
15%

San Bruno Mountain State Park Rainfall Statistics

April Rainfall

San Francisco, San Francisco International Airport (5.6 miles)

Total Rainfall 2026
9.5in
Daily Average 2026
0.1in
Wettest Day 4 January, 2026
1.3in
Wet Days 2026
23/105 (22%)
Total Rainfall March
0.04in
Daily Average March
0in
Wettest Day 31 March, 2026
0.03in
Wet Days March
2/31 (6%)
Total Rainfall April
2.2in
Daily Average April
0.2in
Wettest Day 11 April, 2026
1in
Wet Days April
5/15 (33%)

Climate (2010–Present)

San Francisco, San Francisco International Airport (5.6 miles)

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Annual Average 2021–2025
20.2in
Monthly Average 2021–2026
1.7in
Daily Average 2021–2026
0.1in
Wettest Day 24 October, 2021
4in

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