Frost Dates for Palermo, CA

Based on data from Oroville Muni AP weather station, 6 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. January 29
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 7
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 February 12
First Fall Frost November 30

Hard Freeze (28°F)

Last Spring Hard Freeze January 9
First Fall Hard Freeze December 27
39.44°N, -121.54°W © OpenStreetMap

Growing Season

313 Days January 29 to December 7

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

30° 50° 70° 90°
47°
High: 55°F
Avg: 47°F
Low: 40°F
Jan
52°
High: 61°F
Avg: 52°F
Low: 42°F
Feb
56°
High: 66°F
Avg: 56°F
Low: 45°F
Mar
60°
High: 72°F
Avg: 60°F
Low: 49°F
Apr
68°
High: 81°F
Avg: 68°F
Low: 55°F
May
75°
High: 90°F
Avg: 75°F
Low: 61°F
Jun
81°
High: 96°F
Avg: 81°F
Low: 65°F
Jul
79°
High: 94°F
Avg: 79°F
Low: 64°F
Aug
74°
High: 89°F
Avg: 74°F
Low: 59°F
Sep
65°
High: 78°F
Avg: 65°F
Low: 52°F
Oct
54°
High: 64°F
Avg: 54°F
Low: 44°F
Nov
47°
High: 55°F
Avg: 47°F
Low: 40°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 2" 4" 6" 6.6"
4.7"
4.70"
Jan
6.2"
6.19"
Feb
6.6"
6.62"
Mar
4.7"
4.73"
Apr
3.6"
3.62"
May
0.1"
0.10"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
2.4"
2.40"
Oct
3.5"
3.54"
Nov
6.1"
6.08"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h15h14.5h13.5h12h11h10h9h
Jan: 7:15 AM – 4:45 PM · 9h 30m
Feb: 6:45 AM – 5:15 PM · 10h 30m
Mar: 6:09 AM – 5:51 PM · 11h 41m
Apr: 5:29 AM – 6:31 PM · 13h 03m
May: 4:55 AM – 7:05 PM · 14h 10m
Jun: 4:37 AM – 7:23 PM · 14h 46m
Jul: 4:44 AM – 7:16 PM · 14h 32m
Aug: 5:13 AM – 6:47 PM · 13h 33m
Sep: 5:53 AM – 6:07 PM · 12h 15m
Oct: 6:32 AM – 5:28 PM · 10h 56m
Nov: 7:07 AM – 4:53 PM · 9h 47m
Dec: 7:23 AM – 4:37 PM · 9h 13m
Daylight Longest: 14h 48m · Shortest: 9h 12m

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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