Frost Dates for Modesto, CA

Based on data from Modesto City Co AP weather station, 3 miles away

Elevation: 92 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. January 31
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. December 5

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 February 10
First Fall Frost November 29

Hard Freeze (28°F)

Last Spring Hard Freeze January 8
First Fall Hard Freeze December 21
37.64°N, 121.00°W © OpenStreetMap

Growing Season

309 Days January 31 to December 5

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 9b

Avg. annual minimum: 25 to 30°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

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
January56°47°39°
February62°52°42°
March68°57°45°
April74°61°48°
May82°68°54°
June90°75°59°
July95°79°63°
August94°78°62°
September89°74°59°
October79°65°52°
November66°54°43°
December56°47°39°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.6
February4.0
March3.8
April3.4
May1.4
June0.0
July0.0
August0.0
September0.0
October0.6
November3.1
December4.6

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 36m · Shortest: 9h 24m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:23 AM5:03 PM9h 40m
February7:00 AM5:36 PM10h 36m
March7:22 AM7:05 PM11h 43m
April6:35 AM7:33 PM12h 59m
May5:59 AM8:01 PM14h 02m
June5:46 AM8:22 PM14h 35m
July5:59 AM8:20 PM14h 22m
August6:24 AM7:52 PM13h 27m
September6:51 AM7:05 PM12h 14m
October7:19 AM6:19 PM11h 00m
November6:51 AM4:47 PM9h 56m
December7:17 AM4:42 PM9h 25m

Nearby Stations

Turlock #2, CA January 6 - December 20 Tracy Carbona, CA February 25 - November 26 Stockton Metro AP, CA February 6 - December 1 Newman, CA February 26 - November 29 Merced 23 Wsw, CA March 28 - November 14 Stockton Fire Stn 4, CA February 5 - December 8

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