Middletown, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Middletown, a community in Lake County, California.
Today
98°F
Sunny
Sunny, with a high near 98. South wind 1 to 13 mph, with gusts as high as 18 mph.
7-day forecast for Middletown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 98°F | Sunny | 1 to 13 mph S | 0% |
| Tonight | 57°F | Mostly Clear | 0 to 13 mph WSW | 0% |
| Wednesday | 96°F | Sunny | 0 to 13 mph SSE | 0% |
| Wednesday Night | 56°F | Clear | 0 to 10 mph WSW | 0% |
| Thursday | 97°F | Sunny | 0 to 8 mph SSW | 0% |
| Thursday Night | 58°F | Mostly Clear | 0 to 8 mph W | 0% |
| Friday | 99°F | Sunny | 0 to 8 mph SSW | 0% |
| Friday Night | 61°F | Clear | 0 to 8 mph W | 0% |
| Saturday | 101°F | Sunny | 0 to 9 mph WSW | 0% |
| Saturday Night | 62°F | Mostly Clear | 1 to 9 mph W | 0% |
| Sunday | 98°F | Sunny | 1 to 10 mph SW | 0% |
| Sunday Night | 57°F | Clear | 0 to 10 mph W | 0% |
| Monday | 92°F | Sunny | 0 to 9 mph SSE | 0% |
| Monday Night | 53°F | Mostly Clear | 0 to 9 mph SW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Middletown (38.752, -122.622). Updated through the day.
Growing snapshot for Middletown
Last spring frost
Mar 2
First fall frost
Nov 23
Growing season
263 days
Hardiness zone
9a
More local growing data for Middletown: nearby ZIP 95461 weather · frost dates · planting calendar · California frost dates
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Spring Valley
Upper Lake
Climate data from the nearest NOAA station, Calistoga, Ca (11.2 mi from Middletown). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.