Byron, CA Weather & Growing Conditions
Tonight
61°F
Partly Cloudy
Partly cloudy, with a low around 61. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 61°F | Partly Cloudy | 9 to 14 mph SW | 0% |
| Sunday | 81°F | Partly Sunny | 7 to 10 mph WSW | 0% |
| Sunday Night | 60°F | Mostly Cloudy | 9 to 17 mph WSW | 0% |
| Monday | 84°F | Sunny | 9 to 16 mph WSW | 0% |
| Monday Night | 59°F | Mostly Clear | 7 to 13 mph WSW | 0% |
| Tuesday | 86°F | Sunny | 7 mph WSW | 0% |
| Tuesday Night | 61°F | Mostly Clear | 7 mph WSW | 0% |
| Wednesday | 92°F | Sunny | 5 mph WNW | 0% |
| Wednesday Night | 66°F | Mostly Clear | 1 to 5 mph WNW | 0% |
| Thursday | 96°F | Sunny | 5 mph NW | 0% |
| Thursday Night | 67°F | Mostly Clear | 3 to 8 mph W | 0% |
| Friday | 90°F | Sunny | 7 to 10 mph WSW | 0% |
| Friday Night | 63°F | Mostly Clear | 12 mph WSW | 0% |
| Saturday | 84°F | Sunny | 7 to 12 mph WSW | 1% |
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 Sep 20, 2026.