Knightsen, CA Weather & Growing Conditions
Tonight
58°F
Clear
Clear, with a low around 58. West wind 2 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 58°F | Clear | 2 to 10 mph W | 0% |
| Saturday | 90°F | Sunny | 2 to 8 mph W | 0% |
| Saturday Night | 59°F | Partly Cloudy | 2 to 8 mph W | 0% |
| Sunday | 84°F | Partly Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 58°F | Mostly Cloudy | 5 to 9 mph WSW | 0% |
| Monday | 86°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 58°F | Mostly Clear | 2 to 10 mph WSW | 0% |
| Tuesday | 89°F | Sunny | 2 to 8 mph W | 0% |
| Tuesday Night | 60°F | Clear | 0 to 8 mph W | 0% |
| Wednesday | 96°F | Sunny | 0 to 5 mph WNW | 0% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 5 mph W | 0% |
| Thursday | 97°F | Sunny | 0 to 8 mph WNW | 0% |
| Thursday Night | 64°F | Mostly Clear | 3 to 8 mph W | 0% |
| Friday | 91°F | Sunny | 3 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Knightsen, CA
Last spring frost
Jan 12
First fall frost
Dec 19
Growing season
343 days
Hardiness zone
9b
Explore more for Knightsen, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Antioch Pumping Plt #3, Ca (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.