Byron, CA Weather & Growing Conditions
Tonight
49°F
Partly Cloudy
Partly cloudy, with a low around 49. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy | 5 mph NW | 0% |
| Wednesday | 70°F | Sunny | 5 to 8 mph NW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy | 3 mph W | 1% |
| Thursday | 73°F | Mostly Sunny | 2 to 7 mph NW | 0% |
| Thursday Night | 48°F | Clear | 0 to 3 mph WNW | 0% |
| Friday | 72°F | Sunny | 0 to 5 mph NW | 0% |
| Friday Night | 49°F | Mostly Clear | 0 mph | 0% |
| Saturday | 74°F | Sunny | 2 mph NNE | 0% |
| Saturday Night | 50°F | Mostly Clear | 1 mph NNW | 0% |
| Sunday | 74°F | Sunny | 1 to 5 mph NW | 0% |
| Sunday Night | 51°F | Partly Cloudy | 2 mph NNW | 0% |
| Monday | 73°F | Mostly Sunny | 2 mph WNW | 0% |
| Monday Night | 50°F | Partly Cloudy | 2 mph WNW | 1% |
| Tuesday | 73°F | Sunny | 2 mph NW | 4% |
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 (5.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.