Frost Dates for Idaho Falls Fanning Fld, 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 23
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 20
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 2
First Fall Frost September 12

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 7
First Fall Hard Freeze October 2
43.52°N, -112.07°W © OpenStreetMap

Growing Season

120 Days May 23 to September 20

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°
20°
High: 29°
Avg: 20°
Low: 12°
Jan
25°
High: 34°
Avg: 25°
Low: 16°
Feb
36°
High: 47°
Avg: 36°
Low: 25°
Mar
44°
High: 58°
Avg: 44°
Low: 31°
Apr
53°
High: 67°
Avg: 53°
Low: 38°
May
60°
High: 76°
Avg: 60°
Low: 45°
Jun
68°
High: 87°
Avg: 68°
Low: 49°
Jul
67°
High: 86°
Avg: 67°
Low: 48°
Aug
58°
High: 75°
Avg: 58°
Low: 41°
Sep
45°
High: 59°
Avg: 45°
Low: 31°
Oct
32°
High: 43°
Avg: 32°
Low: 22°
Nov
22°
High: 30°
Avg: 22°
Low: 13°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.6"
1.5"
1.50"
Jan
1.1"
1.15"
Feb
1.5"
1.53"
Mar
1.9"
1.90"
Apr
2.6"
2.57"
May
2.3"
2.27"
Jun
1.5"
1.50"
Jul
1.9"
1.86"
Aug
2.5"
2.48"
Sep
2.4"
2.40"
Oct
1.8"
1.77"
Nov
1.3"
1.34"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:27 AM – 4:33 PM · 9h 06m
Feb: 6:52 AM – 5:08 PM · 10h 16m
Mar: 6:11 AM – 5:49 PM · 11h 39m
Apr: 5:24 AM – 6:36 PM · 13h 12m
May: 4:45 AM – 7:15 PM · 14h 31m
Jun: 4:23 AM – 7:37 PM · 15h 13m
Jul: 4:32 AM – 7:28 PM · 14h 56m
Aug: 5:06 AM – 6:54 PM · 13h 48m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 46m
Nov: 7:17 AM – 4:43 PM · 9h 26m
Dec: 7:37 AM – 4:23 PM · 8h 47m
Daylight Longest: 15h 15m · Shortest: 8h 45m

Nearby Stations

Idaho Falls - Kifi, ID May 9 - October 1 Rigby, IDMay 9 - October 5 Idaho Falls 16 Se, ID June 9 - September 11 Rexburg Byu Idaho, ID May 12 - September 24 Rexburg Madison Co AP, ID May 15 - September 23 Blackfoot Fire Dept, ID May 5 - October 3

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