Frost Dates for Central Valley (historical), CA

Based on data from Shasta Dam weather station, 3 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. February 8
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. December 28
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 1
First Fall Frost December 16

Hard Freeze (28°F)

Last Spring Hard Freeze January 18
First Fall Hard Freeze January 4
40.68°N, -122.37°W © OpenStreetMap

Growing Season

324 Days February 8 to December 28

USDA Hardiness Zone iHardiness 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 (−4 to −1°C)

Learn more

Köppen Climate iThe 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

40° 60° 80° 100°
48°
High: 55°F
Avg: 48°F
Low: 41°F
Jan
50°
High: 59°F
Avg: 50°F
Low: 42°F
Feb
54°
High: 63°F
Avg: 54°F
Low: 44°F
Mar
59°
High: 70°F
Avg: 59°F
Low: 48°F
Apr
67°
High: 79°F
Avg: 67°F
Low: 55°F
May
76°
High: 88°F
Avg: 76°F
Low: 63°F
Jun
83°
High: 97°F
Avg: 83°F
Low: 69°F
Jul
82°
High: 96°F
Avg: 82°F
Low: 68°F
Aug
77°
High: 90°F
Avg: 77°F
Low: 63°F
Sep
66°
High: 78°F
Avg: 66°F
Low: 55°F
Oct
54°
High: 62°F
Avg: 54°F
Low: 46°F
Nov
47°
High: 54°F
Avg: 47°F
Low: 41°F
Dec
Avg High Avg Temp Avg Low

Precipitation

0" 4" 8" 12" 14.0"
14.0"
13.97"
Jan
13.7"
13.73"
Feb
10.7"
10.73"
Mar
8.0"
7.99"
Apr
6.3"
6.30"
May
3.7"
3.68"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
8.1"
8.12"
Oct
10.0"
10.01"
Nov
13.1"
13.07"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14.5h15h14.5h13.5h12.5h11h9.5h9h
Jan: 7:18 AM – 4:42 PM · 9h 23m
Feb: 6:47 AM – 5:13 PM · 10h 26m
Mar: 6:10 AM – 5:50 PM · 11h 41m
Apr: 5:27 AM – 6:33 PM · 13h 06m
May: 4:52 AM – 7:08 PM · 14h 16m
Jun: 4:33 AM – 7:27 PM · 14h 54m
Jul: 4:41 AM – 7:19 PM · 14h 39m
Aug: 5:11 AM – 6:49 PM · 13h 38m
Sep: 5:52 AM – 6:08 PM · 12h 15m
Oct: 6:33 AM – 5:27 PM · 10h 53m
Nov: 7:10 AM – 4:50 PM · 9h 41m
Dec: 7:27 AM – 4:33 PM · 9h 06m
Daylight Longest: 14h 55m · Shortest: 9h 05m

Nearby Stations

Whiskeytown Rsvr, CA February 13 - December 13 Redding 12 Wnw, CA March 19 - November 22 Redding Muni AP, CA March 3 - November 21 Trinity Rvr Hatchery, CA April 23 - October 22 Weaverville, CAMay 3 - October 11 Dunsmuir Trtmt Pl, CA April 23 - October 27

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