Middletown, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Middletown, a community in Lake County, California.
Today
56°F
Light Rain
Rain and patchy fog. Cloudy, with a high near 56. East wind 3 to 7 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Middletown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 56°F | Light Rain | 3 to 7 mph E | 98% |
| Tonight | 37°F | Light Rain Likely then Patchy Fog | 1 to 7 mph N | 67% |
| Wednesday | 67°F | Patchy Fog then Mostly Sunny | 1 to 5 mph WNW | 0% |
| Wednesday Night | 37°F | Partly Cloudy then Patchy Frost | 1 to 5 mph NNW | 0% |
| Thursday | 72°F | Patchy Frost then Sunny | 2 mph NW | 0% |
| Thursday Night | 41°F | Mostly Clear | 2 mph NNW | 0% |
| Friday | 75°F | Sunny | 2 mph W | 0% |
| Friday Night | 44°F | Mostly Clear | 1 mph NNW | 0% |
| Saturday | 76°F | Sunny | 0 to 3 mph E | 0% |
| Saturday Night | 43°F | Mostly Clear | 2 mph E | 0% |
| Sunday | 74°F | Mostly Sunny | 2 mph WNW | 0% |
| Sunday Night | 43°F | Partly Cloudy then Patchy Fog | 2 mph WNW | 1% |
| Monday | 72°F | Patchy Fog then Mostly Sunny | 0 to 3 mph W | 2% |
| Monday Night | 41°F | Partly Cloudy then Patchy Fog | 0 to 3 mph WNW | 4% |
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
Nearby towns & communities
Clearlake
Clearlake Oaks
Clearlake Riviera
Cobb
Hidden Valley Lake
Kelseyville
Lakeport
Lower Lake
Lucerne
Nice
North Lakeport
Soda Bay
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 Nov 3, 2026.