Frost Dates for Ashton 1n, ID

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. May 21
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 21
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 1
First Fall Frost September 13

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 3
First Fall Hard Freeze October 4
44.07°N, -111.46°W © OpenStreetMap

Growing Season

123 Days May 21 to September 21

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 5b

Learn more

Temperature

10° 30° 50° 70° 90°
21°
High: 29°
Avg: 21°
Low: 13°
Jan
25°
High: 33°
Avg: 25°
Low: 17°
Feb
33°
High: 42°
Avg: 33°
Low: 25°
Mar
43°
High: 54°
Avg: 43°
Low: 31°
Apr
53°
High: 65°
Avg: 53°
Low: 40°
May
59°
High: 73°
Avg: 59°
Low: 46°
Jun
67°
High: 83°
Avg: 67°
Low: 51°
Jul
66°
High: 83°
Avg: 66°
Low: 49°
Aug
57°
High: 73°
Avg: 57°
Low: 42°
Sep
45°
High: 57°
Avg: 45°
Low: 32°
Oct
31°
High: 40°
Avg: 31°
Low: 23°
Nov
22°
High: 29°
Avg: 22°
Low: 15°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 6" 6.3"
4.8"
4.83"
Jan
4.5"
4.48"
Feb
4.8"
4.79"
Mar
4.4"
4.44"
Apr
5.6"
5.58"
May
5.4"
5.37"
Jun
3.8"
3.81"
Jul
3.9"
3.87"
Aug
4.6"
4.60"
Sep
6.3"
6.35"
Oct
5.5"
5.45"
Nov
4.8"
4.77"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:29 AM – 4:31 PM · 9h 03m
Feb: 6:53 AM – 5:07 PM · 10h 14m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:23 AM – 6:37 PM · 13h 14m
May: 4:43 AM – 7:17 PM · 14h 34m
Jun: 4:21 AM – 7:39 PM · 15h 17m
Jul: 4:30 AM – 7:30 PM · 14h 59m
Aug: 5:05 AM – 6:55 PM · 13h 50m
Sep: 5:51 AM – 6:09 PM · 12h 17m
Oct: 6:38 AM – 5:22 PM · 10h 45m
Nov: 7:19 AM – 4:41 PM · 9h 23m
Dec: 7:39 AM – 4:21 PM · 8h 43m
Daylight Longest: 15h 19m · Shortest: 8h 41m

Nearby Stations

Saint Anthony, ID May 17 - September 22 Tetonia Exp Stn, ID June 15 - September 7 Sugar City, ID May 29 - September 13 Rexburg Madison Co AP, ID May 15 - September 23 Island Park, ID Rexburg Byu Idaho, ID May 12 - September 24

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