San Miguel, CA Weather & Growing Conditions
This Afternoon
63°F
Chance Light Rain
A chance of rain. Partly sunny. High near 63, with temperatures falling to around 57 in the afternoon. South wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 63°F | Chance Light Rain | 5 mph S | 50% |
| Tonight | 47°F | Chance Light Rain then Mostly Cloudy | 3 mph ENE | 46% |
| Wednesday | 68°F | Sunny | 2 to 6 mph NNW | 1% |
| Wednesday Night | 46°F | Partly Cloudy | 1 to 5 mph W | 0% |
| Thursday | 72°F | Patchy Fog then Sunny | 1 to 5 mph NNW | 0% |
| Thursday Night | 47°F | Mostly Clear | 0 to 3 mph SW | 0% |
| Friday | 74°F | Sunny | 1 to 5 mph NNE | 0% |
| Friday Night | 48°F | Clear | 2 mph N | 0% |
| Saturday | 76°F | Sunny | 1 to 5 mph NE | 0% |
| Saturday Night | 49°F | Mostly Clear | 2 mph WNW | 0% |
| Sunday | 75°F | Mostly Sunny | 1 to 5 mph WNW | 0% |
| Sunday Night | 50°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 72°F | Partly Sunny | 1 to 5 mph SW | 1% |
| Monday Night | 49°F | Partly Cloudy | 3 mph WSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Miguel, CA
Last spring frost
Mar 8
First fall frost
Dec 22
Growing season
282 days
Hardiness zone
9b
Explore more for San Miguel, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Mt Diablo Junction, Ca (5.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.