Hayward, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Hayward, a city in Alameda County, California.
Tonight
58°F
Partly Cloudy
Partly cloudy, with a low around 58. West wind 5 to 8 mph.
7-day forecast for Hayward
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Partly Cloudy | 5 to 8 mph W | 0% |
| Saturday | 76°F | Mostly Sunny | 2 to 13 mph WSW | 0% |
| Saturday Night | 58°F | Mostly Cloudy | 6 to 10 mph W | 0% |
| Sunday | 70°F | Mostly Cloudy | 6 to 12 mph WSW | 3% |
| Sunday Night | 58°F | Mostly Cloudy | 6 to 12 mph WSW | 3% |
| Monday | 72°F | Mostly Sunny | 5 to 12 mph WSW | 0% |
| Monday Night | 58°F | Partly Cloudy | 3 to 12 mph WSW | 0% |
| Tuesday | 75°F | Mostly Sunny | 3 to 12 mph WSW | 0% |
| Tuesday Night | 58°F | Mostly Clear | 2 to 12 mph WSW | 0% |
| Wednesday | 83°F | Sunny | 2 to 10 mph WSW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 2 to 10 mph W | 0% |
| Thursday | 84°F | Sunny | 1 to 12 mph W | 0% |
| Thursday Night | 62°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Friday | 78°F | Mostly Sunny | 2 to 12 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Hayward (37.627, -122.104). Updated through the day.
Growing snapshot for Hayward
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
365 days
Hardiness zone
10a
More local growing data for Hayward: nearby ZIP 94545 weather · frost dates · planting calendar · California frost dates
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Alameda
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Oakland
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Sunol
Union City
Climate data from the nearest NOAA station, Hayward Air Terminal, Ca (1.8 mi from Hayward). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.