Oak Glen, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Glen, a community in San Bernardino County, California.
Overnight
73°F
Mostly Clear
Mostly clear, with a low around 73. North wind around 5 mph.
7-day forecast for Oak Glen
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 73°F | Mostly Clear | 5 mph N | 0% |
| Tuesday | 89°F | Sunny | 5 to 15 mph NW | 2% |
| Tuesday Night | 72°F | Mostly Clear | 5 to 10 mph N | 2% |
| Wednesday | 88°F | Sunny | 0 to 10 mph W | 1% |
| Wednesday Night | 73°F | Mostly Clear | 0 to 10 mph N | 0% |
| Thursday | 89°F | Sunny | 0 to 10 mph S | 4% |
| Thursday Night | 74°F | Mostly Clear | 5 to 10 mph NW | 4% |
| Friday | 90°F | Sunny | 5 to 10 mph W | 4% |
| Friday Night | 74°F | Mostly Clear | 5 to 10 mph NW | 0% |
| Saturday | 91°F | Sunny | 5 to 10 mph W | 2% |
| Saturday Night | 75°F | Mostly Clear | 5 to 10 mph NW | 2% |
| Sunday | 90°F | Sunny | 5 to 10 mph SW | 6% |
| Sunday Night | 72°F | Mostly Clear | 5 to 10 mph N | 4% |
| Monday | 85°F | Sunny | 5 to 10 mph SW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Oak Glen (34.041, -116.962). Updated through the day.
Growing snapshot for Oak Glen
Last spring frost
Jan 27
First fall frost
Dec 19
Growing season
329 days
Hardiness zone
9b
More local growing data for Oak Glen: nearby ZIP 92399 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Redlands, Ca (10.5 mi from Oak Glen). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.