San Dimas, CA Weather & Growing Conditions
This Afternoon
83°F
Sunny
Sunny, with a high near 83. West southwest wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Sunny | 5 to 10 mph WSW | 0% |
| Tonight | 60°F | Mostly Clear | 0 to 5 mph NNW | 0% |
| Saturday | 86°F | Sunny | 0 to 10 mph WSW | 0% |
| Saturday Night | 63°F | Patchy Fog | 0 to 5 mph W | 0% |
| Sunday | 85°F | Patchy Fog then Partly Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 61°F | Mostly Cloudy | 0 to 5 mph SSW | 1% |
| Monday | 82°F | Mostly Sunny | 0 to 10 mph SSW | 1% |
| Monday Night | 60°F | Mostly Clear | 0 to 10 mph SW | 1% |
| Tuesday | 83°F | Sunny | 0 to 5 mph SW | 0% |
| Tuesday Night | 63°F | Clear | 0 to 5 mph NNW | 0% |
| Wednesday | 90°F | Sunny | 0 to 10 mph WNW | 2% |
| Wednesday Night | 66°F | Mostly Clear | 0 to 10 mph WNW | 3% |
| Thursday | 91°F | Sunny | 0 to 5 mph WSW | 2% |
| Thursday Night | 68°F | Mostly Clear | 0 to 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for San Dimas, CA
Last spring frost
Jan 8
First fall frost
Dec 28
Growing season
354 days
Hardiness zone
10a
Explore more for San Dimas, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Pomona/Fairplex, Ca (3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.