0in

Rain Today

Rain Last Hour
0in

Recorded at Hayward, Hayward Air Terminal Updated 1 hour 6 mins ago (3.2 miles away)

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Real-Time Extremes

Hottest 84.1 °F
Weno Island - Chuuk Int. Airport, HI
Coldest -38.3 °F
Wekweeti Airport, Canada, AK
Windiest 45mph
Teller, AK
Wettest (Last Hour) 0.2in
Manteo / Dare County Regional, NC
Most Humid 100%
North Palm Beach County General Aviation Airport, FL
Least Humid 13%
Copper Mountain - Red Cliff Pass, CO
Highest Pressure 1048.1 hPa
Wekweeti Airport, Canada, AK
Lowest Pressure 1003 hPa
Narsarsuaq, ME

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Castro Valley Rainfall Forecast

Today 22 Feb
10%
Mon 23 Feb
35%
Tue 24 Feb
85%
Wed 25 Feb
30%
Thu 26 Feb
15%
Fri 27 Feb
10%
Sat 28 Feb
15%

Castro Valley Rainfall Statistics

February Rainfall

Hayward, Hayward Air Terminal (3.1 miles)

Total Rainfall 2026
6.5in
Daily Average 2026
0.1in
Wettest Day 4 January, 2026
1.6in
Wet Days 2026
13/53 (25%)
Total Rainfall January
3.1in
Daily Average January
0.1in
Wettest Day 4 January, 2026
1.6in
Wet Days January
6/31 (19%)
Total Rainfall February
3.5in
Daily Average February
0.2in
Wettest Day 16 February, 2026
1.3in
Wet Days February
7/22 (32%)

Climate (2010–Present)

Hayward, Hayward Air Terminal (3.1 miles)

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Annual Average 2021–2025
19.4in
Monthly Average 2021–2026
1.6in
Daily Average 2021–2026
0.1in
Wettest Day 31 December, 2022
4.3in

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