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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.