La Mesa, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for La Mesa, a city in San Diego County, California.
This Afternoon
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Northwest wind around 10 mph.
7-day forecast for La Mesa
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 74°F | Mostly Sunny | 10 mph NW | 2% |
| Tonight | 59°F | Slight Chance Rain Showers | 5 to 10 mph N | 18% |
| Wednesday | 74°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Wednesday Night | 57°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Thursday | 78°F | Sunny | 0 to 5 mph SW | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 5 mph N | 0% |
| Friday | 82°F | Sunny | 0 to 5 mph N | 0% |
| Friday Night | 59°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 87°F | Sunny | 0 to 5 mph NE | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 to 10 mph NE | 0% |
| Sunday | 88°F | Sunny | 0 to 5 mph NE | 0% |
| Sunday Night | 63°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 84°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Monday Night | 62°F | Partly Cloudy | 0 to 5 mph NE | 0% |
Forecast source: National Weather Service (api.weather.gov) for La Mesa (32.769, -117.022). Updated through the day.
Growing snapshot for La Mesa
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10b
More local growing data for La Mesa: nearby ZIP 91942 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, El Cajon, Ca (5.6 mi from La Mesa). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.