Byron, CA Weather & Growing Conditions
Overnight
63°F
Clear
Clear, with a low around 63. North northwest wind around 2 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 63°F | Clear | 2 mph NNW | 0% |
| Tuesday | 103°F | Sunny | 3 to 10 mph NW | 0% |
| Tuesday Night | 62°F | Clear | 2 to 9 mph WNW | 0% |
| Wednesday | 101°F | Sunny | 2 to 9 mph NW | 0% |
| Wednesday Night | 62°F | Clear | 2 to 9 mph W | 0% |
| Thursday | 100°F | Sunny | 2 to 10 mph WNW | 0% |
| Thursday Night | 64°F | Clear | 2 to 10 mph W | 0% |
| Friday | 104°F | Sunny | 2 to 10 mph WNW | 0% |
| Friday Night | 66°F | Clear | 2 to 10 mph W | 0% |
| Saturday | 104°F | Sunny | 2 to 10 mph WNW | 0% |
| Saturday Night | 67°F | Clear | 3 to 10 mph W | 0% |
| Sunday | 99°F | Sunny | 3 to 12 mph W | 0% |
| Sunday Night | 63°F | Clear | 5 to 12 mph WSW | 0% |
| Monday | 94°F | Sunny | 5 to 12 mph W | 0% |
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 Aug 4, 2026.