Harman US

Walnut Creek, CA Weather & Growing Conditions

Today
101°F
Sunny
Sunny. High near 101, with temperatures falling to around 97 in the afternoon. West southwest wind 6 to 9 mph.

7-day forecast

WhenTempForecastWindPrecip
Today 101°F Sunny 6 to 9 mph WSW 0%
Tonight 59°F Clear 9 mph SW 0%
Wednesday 96°F Sunny 9 mph WSW 0%
Wednesday Night 59°F Mostly Clear 6 to 9 mph WSW 0%
Thursday 93°F Sunny 8 mph WSW 0%
Thursday Night 61°F Clear 8 mph WSW 0%
Friday 98°F Sunny 8 mph WSW 0%
Friday Night 62°F Clear 8 mph SW 0%
Saturday 97°F Sunny 5 to 9 mph WSW 0%
Saturday Night 64°F Mostly Clear 9 mph SW 0%
Sunday 92°F Sunny 10 mph SW 0%
Sunday Night 60°F Mostly Clear 13 mph SW 0%
Monday 85°F Sunny 12 mph SW 0%
Monday Night 59°F Mostly Clear 12 mph SW 0%

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

Growing snapshot for Walnut Creek, CA

Last spring frost
Jan 7
First fall frost
Dec 19
Growing season
346 days
Hardiness zone
9b

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

Climate data from the nearest NOAA station, Concord Wwtp, Ca (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.