Lake Arrowhead, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Arrowhead, a community in San Bernardino County, California.
Tonight
55°F
Clear
Clear, with a low around 55. South wind 0 to 5 mph.
7-day forecast for Lake Arrowhead
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Clear | 0 to 5 mph S | 2% |
| Saturday | 72°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 59°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Sunday | 70°F | Mostly Sunny | 0 to 5 mph S | 0% |
| Sunday Night | 57°F | Partly Cloudy | 0 to 5 mph S | 2% |
| Monday | 65°F | Sunny | 0 to 5 mph SW | 2% |
| Monday Night | 54°F | Mostly Clear | 0 to 5 mph S | 1% |
| Tuesday | 69°F | Sunny | 0 to 5 mph NW | 1% |
| Tuesday Night | 58°F | Clear | 0 to 10 mph NE | 1% |
| Wednesday | 75°F | Sunny | 0 to 10 mph E | 3% |
| Wednesday Night | 61°F | Mostly Clear | 5 mph SE | 1% |
| Thursday | 76°F | Sunny | 5 to 10 mph S | 6% |
| Thursday Night | 63°F | Mostly Clear | 0 to 5 mph SE | 2% |
| Friday | 75°F | Sunny | 5 mph S | 8% |
Forecast source: National Weather Service (api.weather.gov) for Lake Arrowhead (34.254, -117.178). Updated through the day.
Growing snapshot for Lake Arrowhead
Last spring frost
May 5
First fall frost
Nov 2
Growing season
176 days
Hardiness zone
8b
More local growing data for Lake Arrowhead: nearby ZIP 92352 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Lake Arrowhead, Ca (1.5 mi from Lake Arrowhead). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.