South Mountain Reservoir Rainfall Forecast

Today 18 Apr
No Rain
Sun 19 Apr
No Rain
Mon 20 Apr
30%
Tue 21 Apr
70%
Wed 22 Apr
65%
Thu 23 Apr
25%
Fri 24 Apr
20%

South Mountain Reservoir Rainfall Statistics

April Rainfall

Alturas (22.4 miles)

Total Rainfall 2026
3.9in
Daily Average 2026
0.04in
Wettest Day 24 February, 2026
0.5in
Wet Days 2026
25/108 (23%)
Total Rainfall March
0.3in
Daily Average March
0.01in
Wettest Day 4 March, 2026
0.2in
Wet Days March
3/31 (10%)
Total Rainfall April
0.8in
Daily Average April
0.1in
Wettest Day 1 April, 2026
0.4in
Wet Days April
7/18 (39%)

Climate (2010–Present)

Alturas (22.4 miles)

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Annual Average 2021–2025
12.4in
Monthly Average 2021–2026
1in
Daily Average 2021–2026
0.03in
Wettest Day 2 February, 2025
2.1in

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