Frost Dates for Alturas, CA

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. June 3
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. September 13
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 June 12
First Fall Frost September 6

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 14
First Fall Hard Freeze September 27
41.49°N, -120.54°W © OpenStreetMap

Growing Season

102 Days June 3 to September 13

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 6a

Learn more

Temperature

20° 40° 60° 80°
33°
High: 44°
Avg: 33°
Low: 21°
Jan
35°
High: 47°
Avg: 35°
Low: 23°
Feb
40°
High: 53°
Avg: 40°
Low: 27°
Mar
45°
High: 59°
Avg: 45°
Low: 31°
Apr
54°
High: 70°
Avg: 54°
Low: 37°
May
61°
High: 79°
Avg: 61°
Low: 42°
Jun
68°
High: 90°
Avg: 68°
Low: 46°
Jul
66°
High: 88°
Avg: 66°
Low: 44°
Aug
60°
High: 81°
Avg: 60°
Low: 38°
Sep
49°
High: 67°
Avg: 49°
Low: 31°
Oct
38°
High: 52°
Avg: 38°
Low: 25°
Nov
32°
High: 42°
Avg: 32°
Low: 23°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.5"
2.2"
2.24"
Jan
2.0"
1.97"
Feb
2.5"
2.48"
Mar
2.6"
2.57"
Apr
3.5"
3.53"
May
2.3"
2.25"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
1.7"
1.67"
Sep
3.0"
2.97"
Oct
3.0"
3.00"
Nov
2.8"
2.78"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h14h15h15h14h12h11h10h9h
Jan: 7:21 AM – 4:39 PM · 9h 19m
Feb: 6:48 AM – 5:12 PM · 10h 24m
Mar: 6:10 AM – 5:50 PM · 11h 40m
Apr: 5:26 AM – 6:34 PM · 13h 07m
May: 4:50 AM – 7:10 PM · 14h 20m
Jun: 4:30 AM – 7:30 PM · 14h 59m
Jul: 4:38 AM – 7:22 PM · 14h 43m
Aug: 5:10 AM – 6:50 PM · 13h 40m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:34 AM – 5:26 PM · 10h 51m
Nov: 7:12 AM – 4:48 PM · 9h 37m
Dec: 7:30 AM – 4:30 PM · 9h 01m
Daylight Longest: 15h 00m · Shortest: 8h 60m

Nearby Stations

Alturas Muni AP, CA June 3 - September 12 Cedarville, CAMay 15 - October 1 Canby 3 Sw, CA June 1 - September 16 Jess Valley, CA June 14 - September 18 Adin Rs, CAMay 28 - September 29 Ft Bidwell, CAMay 26 - October 1

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