Frost Dates for Lower Lake, CA

Based on data from Clearlake 4 Se weather station, 2 miles away

Elevation: 1371 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. April 10
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 6

30% Probability

Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost April 18
First Fall Frost November 1

Hard Freeze (28°F)

Last Spring Hard Freeze March 14
First Fall Hard Freeze November 21
38.91°N, 122.61°W © OpenStreetMap

Growing Season

210 Days April 10 to November 6

USDA Hardiness Zone

Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.
Zone 8b

Avg. annual minimum: 15 to 20°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csa Hot-Summer Mediterranean

Hot, dry summers and mild, wet winters. Classic Mediterranean climate ideal for grapes, olives, tomatoes, and herbs. Summer irrigation is usually necessary.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January55°44°33°
February58°46°34°
March62°49°35°
April66°53°39°
May73°59°45°
June83°67°52°
July91°74°56°
August91°72°54°
September85°68°50°
October75°59°43°
November63°50°36°
December55°44°33°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January7.6
February7.1
March6.3
April3.5
May3.0
June0.4
July0.0
August0.0
September0.0
October2.6
November5.1
December8.0

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 44m · Shortest: 9h 16m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:33 AM5:06 PM9h 33m
February7:09 AM5:41 PM10h 32m
March7:29 AM7:11 PM11h 42m
April6:40 AM7:41 PM13h 02m
May6:03 AM8:10 PM14h 08m
June5:49 AM8:32 PM14h 43m
July6:02 AM8:30 PM14h 29m
August6:29 AM8:00 PM13h 31m
September6:58 AM7:12 PM12h 14m
October7:27 AM6:24 PM10h 57m
November7:01 AM4:50 PM9h 50m
December7:28 AM4:45 PM9h 17m

Nearby Stations

Calistoga, CA March 2 - November 23 Angwin Pacific Union College, CA April 7 - December 5 Healdsburg, CA February 15 - December 2 Cloverdale, CA February 25 - December 3 Saint Helena, CA February 3 - December 4 East Park Rsvr, CA April 6 - November 10

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