Byron, CA Weather & Growing Conditions
Overnight
52°F
Mostly Clear
Mostly clear, with a low around 52. West northwest wind around 8 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 8 mph WNW | 0% |
| Wednesday | 68°F | Sunny | 6 to 12 mph NW | 1% |
| Wednesday Night | 52°F | Mostly Cloudy | 7 mph WSW | 1% |
| Thursday | 71°F | Mostly Sunny | 2 to 10 mph NW | 0% |
| Thursday Night | 52°F | Clear | 3 mph WSW | 0% |
| Friday | 72°F | Sunny | 0 to 5 mph NW | 0% |
| Friday Night | 54°F | Mostly Clear | 0 mph | 0% |
| Saturday | 74°F | Sunny | 0 to 5 mph NNE | 0% |
| Saturday Night | 54°F | Mostly Clear | 1 mph NW | 0% |
| Sunday | 73°F | Sunny | 1 to 5 mph WNW | 0% |
| Sunday Night | 55°F | Partly Cloudy | 1 mph NW | 0% |
| Monday | 72°F | Mostly Sunny | 3 mph WNW | 0% |
| Monday Night | 54°F | Partly Cloudy | 3 mph W | 1% |
| Tuesday | 72°F | Sunny | 3 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Byron, CA
Last spring frost
Jan 19
First fall frost
Dec 10
Growing season
330 days
Hardiness zone
9b
Explore more for Byron, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Tracy Pumping Plt, Ca (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.