Frost Dates for Sonora, 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. April 9
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 9
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 April 18
First Fall Frost November 1

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze March 4
First Fall Hard Freeze November 27
37.97°N, -120.39°W © OpenStreetMap

Growing Season

214 Days April 9 to November 9

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 9a

Learn more

Temperature

30° 50° 70° 90°
44°
High: 56°
Avg: 44°
Low: 33°
Jan
46°
High: 58°
Avg: 46°
Low: 34°
Feb
50°
High: 62°
Avg: 50°
Low: 37°
Mar
53°
High: 67°
Avg: 53°
Low: 40°
Apr
61°
High: 76°
Avg: 61°
Low: 46°
May
68°
High: 85°
Avg: 68°
Low: 51°
Jun
75°
High: 93°
Avg: 75°
Low: 57°
Jul
74°
High: 92°
Avg: 74°
Low: 56°
Aug
69°
High: 87°
Avg: 69°
Low: 51°
Sep
60°
High: 76°
Avg: 60°
Low: 43°
Oct
50°
High: 63°
Avg: 50°
Low: 36°
Nov
44°
High: 55°
Avg: 44°
Low: 32°
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9" 11.9"
11.9"
11.87"
Jan
9.9"
9.94"
Feb
9.3"
9.29"
Mar
7.6"
7.61"
Apr
5.3"
5.31"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
4.2"
4.16"
Oct
8.2"
8.15"
Nov
11.4"
11.40"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec10h11h12h13h14h15h14h13h12h11h10h9h
Jan: 7:11 AM – 4:49 PM · 9h 39m
Feb: 6:42 AM – 5:18 PM · 10h 35m
Mar: 6:09 AM – 5:51 PM · 11h 42m
Apr: 5:30 AM – 6:30 PM · 12h 59m
May: 4:58 AM – 7:02 PM · 14h 03m
Jun: 4:41 AM – 7:19 PM · 14h 37m
Jul: 4:48 AM – 7:12 PM · 14h 23m
Aug: 5:16 AM – 6:44 PM · 13h 28m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:30 AM – 5:30 PM · 10h 59m
Nov: 7:03 AM – 4:57 PM · 9h 54m
Dec: 7:19 AM – 4:41 PM · 9h 23m
Daylight Longest: 14h 38m · Shortest: 9h 22m

Nearby Stations

New Melones Dam Hq, CA February 20 - December 11 Groveland 2, CA April 22 - November 2 Calaveras Big Trees, CA May 7 - October 28 Cherry Valley Dam, CA May 2 - November 4 Camp Pardee, CA January 22 - December 17 Hetch Hetchy, CA April 16 - November 12

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