Hayward, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in Hayward, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 104°F (40°C) | September 6, 2020 |
| Record Low | 26°F (-3°C) | December 9, 1972 and December 11, 1972 |
| Lowest High | 37.9°F (3°C) | December 9, 1972 |
| Highest Low | 69°F (21°C) | August 14, 2020 |
| Highest Mean | 85°F (29°C) | September 6, 2020 |
| Lowest Mean | 31.9°F (0°C) | December 9, 1972 |
| Precipitation | ||
| Max in One Calendar Day | 5.01" (127.3 mm) | December 31, 2022 |
| Max in One Month | 11.50" (292.2 mm) | December 2022 |
| Least in One Month | 0.00" (0.0 mm) | September 1979 |
| Max in One Year | 29.38" (746.2 mm) | 1973 |
| Least in One Year | 4.89" (124.2 mm) | 2013 |
| Snowfall | ||
| Max in One Calendar Day | 1.0" (2.5 cm) | February 5, 1976 |
| Max in One Month | 1.0" (2.5 cm) | February 1976 |
| Max in One Season | 1.0" (2.5 cm) | 1975-76 |
| Max in One Year | 1.0" (2.5 cm) | 1976 |
| Earliest Snow | 1.0" (2.5 cm) | February 5, 1976 |
| Earliest Measurable Snow | 1.0" (2.5 cm) | February 5, 1976 |
| Latest Snow | 1.0" (2.5 cm) | February 5, 1976 |
| Latest Measurable Snow | 1.0" (2.5 cm) | February 5, 1976 |
| Period of Record | ||
| Temperature | January 1, 1970 – August 1, 2026 | |
| Precipitation | January 1, 1970 – August 1, 2026 | |
| Snowfall | January 1, 1970 – May 25, 2020 | |
Note: Records compiled from NOAA GHCN-Daily observations at OAKLAND INTL AP (8 mi from Hayward, CA). Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
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Frequently Asked Questions
What is the hottest temperature ever recorded in Hayward, CA?
The all-time record high in Hayward, CA is 104°F (40°C), set on September 6, 2020.
What is the coldest temperature ever recorded in Hayward, CA?
The all-time record low in Hayward, CA is 26°F (-3°C), set on December 9, 1972 and December 11, 1972.
What is the most rain Hayward, CA has ever had in one day?
The most precipitation recorded in one calendar day near Hayward, CA is 5.01 inches, on December 31, 2022.
What is the biggest snowfall ever recorded in Hayward, CA?
The most snow recorded in one calendar day near Hayward, CA is 1.0 inches, on February 5, 1976.
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