Diablo Grande, CA Weather & Growing Conditions
Overnight
73°F
Clear
Clear. Low around 73, with temperatures rising to around 75 overnight. West southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Clear | 3 mph WSW | 0% |
| Tuesday | 98°F | Sunny | 3 to 7 mph ESE | 0% |
| Tuesday Night | 69°F | Clear | 2 to 6 mph W | 0% |
| Wednesday | 97°F | Sunny | 2 to 8 mph NNE | 0% |
| Wednesday Night | 69°F | Clear | 2 to 8 mph WNW | 0% |
| Thursday | 98°F | Sunny | 2 to 9 mph NNW | 0% |
| Thursday Night | 71°F | Clear | 2 to 9 mph WNW | 0% |
| Friday | 98°F | Sunny | 2 to 9 mph NNW | 0% |
| Friday Night | 73°F | Clear | 2 to 9 mph WNW | 0% |
| Saturday | 99°F | Sunny | 2 to 9 mph NNW | 0% |
| Saturday Night | 73°F | Mostly Clear | 3 to 9 mph W | 0% |
| Sunday | 97°F | Sunny | 3 to 9 mph W | 0% |
| Sunday Night | 68°F | Mostly Clear | 5 to 9 mph W | 0% |
| Monday | 92°F | Sunny | 5 to 8 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Diablo Grande, CA
Last spring frost
Feb 26
First fall frost
Nov 29
Growing season
273 days
Hardiness zone
9b
Explore more for Diablo Grande, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Newman, Ca (14.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.