Frost Dates for Quincy, CA

Elevation: 1042 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. May 22
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. September 25

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 June 1
First Fall Frost September 16

Hard Freeze (28°F)

Last Spring Hard Freeze April 29
First Fall Hard Freeze October 9
39.94°N, 120.95°W © OpenStreetMap

Growing Season

126 Days May 22 to September 25

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 7b

Avg. annual minimum: 5 to 10°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) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January44°35°25°
February50°38°26°
March56°43°29°
April62°47°32°
May71°55°39°
June80°62°43°
July89°68°48°
August88°67°45°
September82°61°40°
October69°51°33°
November52°40°28°
December43°34°25°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January9.5
February9.1
March8.4
April5.8
May4.8
June2.5
July0.0
August0.0
September0.0
October6.0
November7.5
December9.8

Sunrise / Sunset

Daylight Pacific Time (PT) Longest: 14h 50m · Shortest: 9h 10m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month Sunrise Sunset Daylight
January7:29 AM4:57 PM9h 28m
February7:04 AM5:33 PM10h 29m
March7:23 AM7:04 PM11h 41m
April6:32 AM7:36 PM13h 04m
May5:54 AM8:06 PM14h 12m
June5:39 AM8:29 PM14h 49m
July5:52 AM8:26 PM14h 34m
August6:21 AM7:55 PM13h 35m
September6:51 AM7:06 PM12h 15m
October7:21 AM6:16 PM10h 55m
November6:57 AM4:41 PM9h 45m
December7:24 AM4:35 PM9h 11m

Nearby Stations

Canyon Dam, CAMay 18 - October 8 Downieville, CA April 28 - October 25 Portola, CAJune 11 - September 10 Strawberry Valley, CA May 4 - October 30 Chester, CAMay 28 - September 28 De Sabla, CA April 17 - November 11

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