Frost Dates for Oroville Muni AP, CA

Elevation: 58 m

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 29
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 7

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 12
First Fall Frost November 30

Hard Freeze (28°F)

Last Spring Hard Freeze January 9
First Fall Hard Freeze December 27
39.49°N, 121.62°W © OpenStreetMap

Growing Season

313 Days January 29 to December 7

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.
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°47°40°
February61°52°42°
March66°56°45°
April72°60°49°
May81°68°55°
June90°75°61°
July96°81°65°
August94°79°64°
September89°74°59°
October78°65°52°
November64°54°44°
December55°47°40°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January4.7
February6.2
March6.6
April4.7
May3.6
June0.1
July0.0
August0.0
September0.0
October2.4
November3.5
December6.1

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 48m · Shortest: 9h 12m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:31 AM5:01 PM9h 30m
February7:06 AM5:36 PM10h 30m
March7:25 AM7:07 PM11h 41m
April6:35 AM7:38 PM13h 03m
May5:58 AM8:08 PM14h 10m
June5:43 AM8:30 PM14h 46m
July5:56 AM8:28 PM14h 32m
August6:24 AM7:57 PM13h 33m
September6:54 AM7:08 PM12h 15m
October7:24 AM6:20 PM10h 56m
November6:58 AM4:45 PM9h 47m
December7:26 AM4:39 PM9h 13m

Nearby Stations

Oroville, CA January 30 - December 13 Chico Univ Farm, CA March 4 - November 17 Paradise, CA February 7 - December 18 Marysville, CA January 15 - December 12 Dobbins 1 S, CA April 1 - November 17 De Sabla, CA April 17 - November 11

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