Knightsen, CA Weather & Growing Conditions
Overnight
50°F
Mostly Clear
Mostly clear, with a low around 50. West northwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Clear | 6 mph WNW | 0% |
| Wednesday | 69°F | Sunny | 6 to 10 mph NW | 1% |
| Wednesday Night | 50°F | Mostly Cloudy | 5 mph W | 1% |
| Thursday | 72°F | Mostly Sunny | 3 to 8 mph NW | 0% |
| Thursday Night | 48°F | Clear | 1 to 5 mph W | 0% |
| Friday | 72°F | Sunny | 0 to 5 mph NW | 0% |
| Friday Night | 48°F | Mostly Clear | 0 mph | 0% |
| Saturday | 73°F | Sunny | 0 to 3 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 2 mph WNW | 0% |
| Sunday | 73°F | Sunny | 1 to 5 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 1 mph NW | 0% |
| Monday | 72°F | Mostly Sunny | 0 to 3 mph W | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 3 mph WSW | 1% |
| Tuesday | 72°F | Patchy Fog then Sunny | 3 mph WNW | 5% |
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 Nov 4, 2026.