Lake Riverside, CA Weather & Growing Conditions
This Afternoon
66°F
Mostly Sunny
Mostly sunny, with a high near 66. West wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Mostly Sunny | 5 to 10 mph W | 0% |
| Tonight | 44°F | Partly Cloudy | 0 to 5 mph W | 0% |
| Wednesday | 66°F | Patchy Fog then Sunny | 0 to 5 mph W | 0% |
| Wednesday Night | 46°F | Mostly Clear | 0 to 10 mph E | 0% |
| Thursday | 70°F | Sunny | 0 to 10 mph N | 0% |
| Thursday Night | 48°F | Mostly Clear | 0 to 10 mph NE | 0% |
| Friday | 71°F | Sunny | 0 to 10 mph NE | 0% |
| Friday Night | 49°F | Clear | 0 to 15 mph NE | 0% |
| Saturday | 73°F | Sunny | 5 to 15 mph E | 0% |
| Saturday Night | 51°F | Clear | 5 to 20 mph E | 0% |
| Sunday | 74°F | Sunny | 5 to 15 mph E | 0% |
| Sunday Night | 53°F | Partly Cloudy | 5 to 20 mph E | 0% |
| Monday | 73°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Monday Night | 51°F | Partly Cloudy | 0 to 5 mph S | 1% |
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 Nov 4, 2026.