La Mesa, CA Weather & Growing Conditions
Tonight
59°F
Slight Chance Rain Showers
A slight chance of rain showers between 10pm and 4am. Mostly cloudy, with a low around 59. North wind around 5 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Slight Chance Rain Showers | 5 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 10 mph SW | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 5 mph N | 0% |
| Friday | 83°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 N | 0% |
| Sunday Night | 63°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 85°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Monday Night | 62°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Tuesday | 82°F | Mostly Sunny | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for La Mesa, CA
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10b
Explore more for La Mesa, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, El Cajon, Ca (5.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.