Pittsburg, CA Weather & Growing Conditions
Tonight
50°F
Chance Light Rain then Mostly Cloudy
A chance of rain before 10pm. Mostly cloudy, with a low around 50. Northeast wind 3 to 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Chance Light Rain then Mostly Cloudy | 3 to 8 mph NE | 41% |
| Wednesday | 67°F | Sunny | 7 mph NW | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 8 mph WSW | 0% |
| Thursday | 70°F | Sunny | 2 to 6 mph WNW | 0% |
| Thursday Night | 51°F | Mostly Clear | 2 to 6 mph WSW | 0% |
| Friday | 71°F | Sunny | 1 to 5 mph NNW | 0% |
| Friday Night | 51°F | Clear | 1 mph NW | 0% |
| Saturday | 70°F | Sunny | 0 to 6 mph NE | 0% |
| Saturday Night | 52°F | Mostly Clear | 1 to 6 mph WSW | 0% |
| Sunday | 70°F | Mostly Sunny | 1 to 6 mph NW | 0% |
| Sunday Night | 53°F | Partly Cloudy | 1 to 5 mph WSW | 0% |
| Monday | 69°F | Partly Sunny | 5 mph WSW | 1% |
| Monday Night | 52°F | Partly Cloudy | 5 mph WSW | 1% |
| Tuesday | 69°F | Mostly Sunny | 3 mph W | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Pittsburg, CA
Last spring frost
Jan 9
First fall frost
Dec 14
Growing season
343 days
Hardiness zone
9b
Explore more for Pittsburg, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Concord Buchanan Fld, Ca (7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.