Knightsen, CA Weather & Growing Conditions
This Afternoon
69°F
Sunny
Sunny. High near 69, with temperatures falling to around 66 in the afternoon. West northwest wind 6 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Sunny | 6 to 10 mph WNW | 1% |
| Tonight | 48°F | Partly Cloudy | 5 mph W | 1% |
| Thursday | 72°F | Sunny | 3 to 9 mph WNW | 0% |
| Thursday Night | 48°F | Mostly Clear | 5 mph W | 0% |
| Friday | 71°F | Sunny | 2 to 6 mph NW | 0% |
| Friday Night | 47°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 73°F | Sunny | 0 to 3 mph NNE | 0% |
| Saturday Night | 49°F | Mostly Clear | 2 mph WNW | 0% |
| Sunday | 73°F | Sunny | 5 mph NW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 72°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Monday Night | 49°F | Partly Cloudy then Patchy Fog | 0 to 3 mph W | 1% |
| Tuesday | 73°F | Patchy Fog then Sunny | 2 mph NW | 1% |
| Tuesday Night | 50°F | Partly Cloudy | 2 mph WNW | 4% |
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 5, 2026.