Frost Dates for Alta 1 Nnw, WY

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 14
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 11
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 21
First Fall Frost September 4

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 24
First Fall Hard Freeze September 23
43.77°N, -111.03°W © OpenStreetMap

Growing Season

89 Days June 14 to September 11

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 5a

Learn more

Temperature

10° 30° 50° 70°
20°
High: 29°
Avg: 20°
Low: 12°
Jan
23°
High: 32°
Avg: 23°
Low: 14°
Feb
30°
High: 40°
Avg: 30°
Low: 21°
Mar
38°
High: 48°
Avg: 38°
Low: 27°
Apr
48°
High: 60°
Avg: 48°
Low: 36°
May
56°
High: 69°
Avg: 56°
Low: 42°
Jun
64°
High: 79°
Avg: 64°
Low: 49°
Jul
63°
High: 78°
Avg: 63°
Low: 47°
Aug
54°
High: 69°
Avg: 54°
Low: 40°
Sep
42°
High: 53°
Avg: 42°
Low: 30°
Oct
29°
High: 39°
Avg: 29°
Low: 20°
Nov
20°
High: 28°
Avg: 20°
Low: 12°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 7.1"
6.6"
6.64"
Jan
5.6"
5.57"
Feb
5.5"
5.52"
Mar
6.2"
6.22"
Apr
6.7"
6.70"
May
6.0"
6.02"
Jun
5.6"
5.62"
Jul
4.8"
4.82"
Aug
6.5"
6.46"
Sep
7.1"
7.12"
Oct
6.0"
6.00"
Nov
6.7"
6.72"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:28 AM – 4:32 PM · 9h 05m
Feb: 6:52 AM – 5:08 PM · 10h 15m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:23 AM – 6:37 PM · 13h 13m
May: 4:44 AM – 7:16 PM · 14h 32m
Jun: 4:22 AM – 7:38 PM · 15h 15m
Jul: 4:31 AM – 7:29 PM · 14h 58m
Aug: 5:06 AM – 6:54 PM · 13h 49m
Sep: 5:51 AM – 6:09 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 45m
Nov: 7:18 AM – 4:42 PM · 9h 25m
Dec: 7:38 AM – 4:22 PM · 8h 45m
Daylight Longest: 15h 16m · Shortest: 8h 44m

Nearby Stations

Driggs, IDJune 13 - September 9 Tetonia Exp Stn, ID June 15 - September 7 Moose 1 Nne, WY June 24 - August 28 Moose, WYJune 20 - August 31 Moran 5wnw, WY Jackson, WY

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