Frost Dates for Cottonwood, CA

Based on data from Winters weather station, 9 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 18
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. November 30
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 November 23

Hard Freeze (28°F)

Last Spring Hard Freeze January 14
First Fall Hard Freeze December 15
38.66°N, -121.97°W © OpenStreetMap

Growing Season

286 Days February 18 to November 30

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: 57°F
Avg: 47°F
Low: 38°F
Jan
51°
High: 62°F
Avg: 51°F
Low: 41°F
Feb
56°
High: 68°F
Avg: 56°F
Low: 44°F
Mar
61°
High: 74°F
Avg: 61°F
Low: 48°F
Apr
68°
High: 83°F
Avg: 68°F
Low: 53°F
May
74°
High: 90°F
Avg: 74°F
Low: 58°F
Jun
77°
High: 95°F
Avg: 77°F
Low: 60°F
Jul
77°
High: 95°F
Avg: 77°F
Low: 59°F
Aug
74°
High: 91°F
Avg: 74°F
Low: 57°F
Sep
65°
High: 81°F
Avg: 65°F
Low: 50°F
Oct
54°
High: 66°F
Avg: 54°F
Low: 42°F
Nov
47°
High: 57°F
Avg: 47°F
Low: 37°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 2" 4" 5.1"
3.6"
3.58"
Jan
5.1"
5.09"
Feb
4.4"
4.43"
Mar
2.4"
2.43"
Apr
1.4"
1.41"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
1.4"
1.36"
Oct
2.9"
2.86"
Nov
4.4"
4.36"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:12 AM – 4:48 PM · 9h 36m
Feb: 6:43 AM – 5:17 PM · 10h 33m
Mar: 6:09 AM – 5:51 PM · 11h 42m
Apr: 5:30 AM – 6:30 PM · 13h 01m
May: 4:57 AM – 7:03 PM · 14h 06m
Jun: 4:40 AM – 7:20 PM · 14h 41m
Jul: 4:47 AM – 7:13 PM · 14h 26m
Aug: 5:15 AM – 6:45 PM · 13h 30m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:31 AM – 5:29 PM · 10h 58m
Nov: 7:04 AM – 4:56 PM · 9h 52m
Dec: 7:20 AM – 4:40 PM · 9h 19m
Daylight Longest: 14h 42m · Shortest: 9h 18m

Nearby Stations

Lake Solano, CA February 4 - December 5 Markley Cove, CA March 6 - November 30 Vacaville, CA January 31 - December 11 Vacaville Nut Tree AP, CA February 18 - November 28 Davis 2 Wsw Exp Farm, CA February 10 - December 1 Woodland 1 Wnw, CA February 7 - December 5

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview