Upper Lake, CA Weather & Growing Conditions
This Afternoon
84°F
Sunny
Sunny, with a high near 84. West northwest wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 84°F | Sunny | 10 mph WNW | 0% |
| Tonight | 53°F | Clear | 3 to 10 mph NNW | 0% |
| Saturday | 90°F | Sunny | 1 to 7 mph WNW | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 1 to 7 mph NNW | 0% |
| Sunday | 88°F | Partly Sunny | 1 to 6 mph SSW | 0% |
| Sunday Night | 56°F | Partly Cloudy | 1 to 6 mph NNW | 0% |
| Monday | 90°F | Sunny | 1 to 8 mph W | 0% |
| Monday Night | 56°F | Mostly Clear | 0 to 8 mph NNW | 0% |
| Tuesday | 92°F | Sunny | 0 to 7 mph WNW | 0% |
| Tuesday Night | 57°F | Mostly Clear | 2 to 7 mph NNW | 0% |
| Wednesday | 94°F | Sunny | 2 to 7 mph S | 0% |
| Wednesday Night | 59°F | Mostly Clear | 1 to 7 mph N | 0% |
| Thursday | 93°F | Sunny | 2 to 8 mph S | 0% |
| Thursday Night | 57°F | Partly Cloudy | 2 to 8 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Upper Lake, CA
Last spring frost
Apr 8
First fall frost
Nov 6
Growing season
211 days
Hardiness zone
9a
Explore more for Upper Lake, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Potter Valley Powerhouse, Ca (15.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.