Lake Riverside, CA Weather & Growing Conditions
Tonight
48°F
Mostly Clear
Mostly clear, with a low around 48. Northeast wind 0 to 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Clear | 0 to 5 mph NE | 2% |
| Saturday | 81°F | Sunny | 0 to 10 mph W | 0% |
| Saturday Night | 53°F | Mostly Clear | 0 to 5 mph N | 0% |
| Sunday | 80°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 0 to 5 mph W | 2% |
| Monday | 74°F | Sunny | 0 to 10 mph W | 1% |
| Monday Night | 49°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Tuesday | 78°F | Sunny | 0 to 10 mph NW | 1% |
| Tuesday Night | 54°F | Clear | 0 to 10 mph NE | 0% |
| Wednesday | 86°F | Sunny | 0 to 10 mph E | 3% |
| Wednesday Night | 59°F | Mostly Clear | 0 to 5 mph E | 3% |
| Thursday | 87°F | Sunny | 5 to 10 mph SE | 8% |
| Thursday Night | 60°F | Mostly Clear | 0 to 5 mph E | 2% |
| Friday | 85°F | Slight Chance Rain Showers | 5 to 10 mph SW | 17% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Riverside, CA
Last spring frost
Apr 29
First fall frost
Nov 18
Growing season
201 days
Hardiness zone
9b
Explore more for Lake Riverside, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Palomar Mtn Obsy, Ca (8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.