Harman US

Hayward, CA Weather & Growing Conditions

Overnight
56°F
Mostly Clear
Mostly clear, with a low around 56. West southwest wind around 2 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 56°F Mostly Clear 2 mph WSW 0%
Tuesday 86°F Haze then Sunny 2 to 9 mph WSW 0%
Tuesday Night 57°F Mostly Clear 2 to 8 mph WNW 0%
Wednesday 83°F Sunny 2 to 8 mph W 0%
Wednesday Night 58°F Mostly Clear 2 to 8 mph W 0%
Thursday 81°F Mostly Sunny 2 to 9 mph W 0%
Thursday Night 59°F Mostly Clear 2 to 9 mph W 0%
Friday 84°F Mostly Sunny 2 to 8 mph W 0%
Friday Night 61°F Partly Cloudy 3 to 8 mph WSW 0%
Saturday 84°F Sunny 2 to 9 mph WSW 0%
Saturday Night 62°F Mostly Clear 5 to 9 mph WSW 0%
Sunday 79°F Sunny 5 to 9 mph WSW 0%
Sunday Night 58°F Partly Cloudy 9 mph WSW 0%
Monday 75°F Mostly Sunny 7 to 10 mph WSW 0%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Hayward, CA

Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
365 days
Hardiness zone
9b

Explore more for Hayward, CA: full frost dates · planting calendar · California frost dates

Climate data from the nearest NOAA station, Hayward Air Terminal, Ca (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.