Byron, CA Weather & Growing Conditions
Today
101°F
Sunny
Sunny, with a high near 101. West wind 6 to 12 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 101°F | Sunny | 6 to 12 mph W | 0% |
| Tonight | 64°F | Clear | 6 to 13 mph WSW | 0% |
| Wednesday | 100°F | Sunny | 6 to 10 mph WNW | 0% |
| Wednesday Night | 65°F | Clear | 7 to 12 mph W | 0% |
| Thursday | 99°F | Sunny | 6 to 13 mph W | 0% |
| Thursday Night | 67°F | Clear | 8 to 13 mph W | 0% |
| Friday | 102°F | Sunny | 8 to 13 mph W | 0% |
| Friday Night | 69°F | Clear | 8 to 13 mph WSW | 0% |
| Saturday | 102°F | Sunny | 7 to 13 mph W | 0% |
| Saturday Night | 70°F | Clear | 13 mph WSW | 0% |
| Sunday | 97°F | Sunny | 9 to 15 mph W | 0% |
| Sunday Night | 65°F | Clear | 17 mph WSW | 0% |
| Monday | 92°F | Sunny | 8 to 15 mph W | 0% |
| Monday Night | 62°F | Mostly Clear | 9 to 16 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 (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.