Frost Dates for Atwater, CA

Based on data from Merced weather station, 7 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. March 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. November 24
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 19
First Fall Frost November 16

Hard Freeze (28°F)

Last Spring Hard Freeze February 2
First Fall Hard Freeze December 11
37.35°N, -120.61°W © OpenStreetMap

Growing Season

266 Days March 3 to November 24

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

Avg. annual minimum: 20 to 25°F (−7 to −4°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

BSh Hot Semi-Arid (Steppe)

Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.

Köppen climate map

Temperature

30° 50° 70° 90°
46°
High: 54°F
Avg: 46°F
Low: 37°F
Jan
50°
High: 61°F
Avg: 50°F
Low: 39°F
Feb
54°
High: 67°F
Avg: 54°F
Low: 42°F
Mar
59°
High: 73°F
Avg: 59°F
Low: 46°F
Apr
67°
High: 82°F
Avg: 67°F
Low: 52°F
May
73°
High: 89°F
Avg: 73°F
Low: 57°F
Jun
78°
High: 95°F
Avg: 78°F
Low: 62°F
Jul
77°
High: 94°F
Avg: 77°F
Low: 60°F
Aug
73°
High: 89°F
Avg: 73°F
Low: 56°F
Sep
64°
High: 79°F
Avg: 64°F
Low: 49°F
Oct
53°
High: 65°F
Avg: 53°F
Low: 41°F
Nov
46°
High: 55°F
Avg: 46°F
Low: 36°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 2" 4" 5.2"
5.2"
5.16"
Jan
4.5"
4.48"
Feb
4.8"
4.83"
Mar
4.0"
3.98"
Apr
0.0"
0.00"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
0.8"
0.80"
Oct
3.7"
3.74"
Nov
4.8"
4.84"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:09 AM – 4:51 PM · 9h 42m
Feb: 6:41 AM – 5:19 PM · 10h 37m
Mar: 6:09 AM – 5:51 PM · 11h 43m
Apr: 5:31 AM – 6:29 PM · 12h 58m
May: 4:60 AM – 7:00 PM · 14h 00m
Jun: 4:43 AM – 7:17 PM · 14h 33m
Jul: 4:50 AM – 7:10 PM · 14h 20m
Aug: 5:17 AM – 6:43 PM · 13h 26m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:30 AM – 5:30 PM · 11h 01m
Nov: 7:01 AM – 4:59 PM · 9h 57m
Dec: 7:17 AM – 4:43 PM · 9h 27m
Daylight Longest: 14h 34m · Shortest: 9h 26m

Nearby Stations

Merced Muni AP, CA February 26 - November 25 Merced 23 Wsw, CA March 28 - November 14 Turlock #2, CA January 6 - December 20 Los Banos, CA January 26 - December 10 Newman, CA February 26 - November 29 Madera Muni AP, CA February 12 - November 30

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