Frost Dates for Larkfield-Wikiup, CA

Based on data from Santa Rosa Sonoma Co AP weather station, 3 miles away

Elevation: 322 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. March 2
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 20

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 March 14
First Fall Frost November 12

Hard Freeze (28°F)

Last Spring Hard Freeze January 23
First Fall Hard Freeze December 5
38.51°N, 122.75°W © OpenStreetMap

Growing Season

263 Days March 2 to November 20

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 9a

Avg. annual minimum: 20 to 25°F

Learn more

Köppen Climate

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

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

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
January58°48°38°
February62°51°39°
March65°53°41°
April69°56°43°
May75°61°47°
June82°66°50°
July84°68°52°
August84°68°52°
September83°67°50°
October77°61°46°
November65°53°40°
December58°47°37°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January7.3
February7.3
March6.5
April4.2
May2.5
June0.0
July0.0
August0.0
September0.0
October3.7
November5.6
December8.2

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 41m · Shortest: 9h 19m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:33 AM5:08 PM9h 36m
February7:09 AM5:42 PM10h 33m
March7:30 AM7:12 PM11h 42m
April6:41 AM7:42 PM13h 01m
May6:05 AM8:10 PM14h 06m
June5:51 AM8:32 PM14h 40m
July6:04 AM8:30 PM14h 26m
August6:30 AM8:00 PM13h 30m
September6:59 AM7:13 PM12h 14m
October7:27 AM6:25 PM10h 58m
November7:01 AM4:52 PM9h 52m
December7:27 AM4:47 PM9h 19m

Nearby Stations

Graton, CAMarch 20 - November 13 Santa Rosa, CA February 25 - December 1 Healdsburg, CA February 15 - December 2 Occidental, CA January 29 - December 30 Calistoga, CA March 2 - November 23 Saint Helena, CA February 3 - December 4

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