Frost Dates for Grace, 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 29
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 17
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 5
First Fall Frost September 10

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 9
First Fall Hard Freeze October 1
42.59°N, -111.73°W © OpenStreetMap

Growing Season

111 Days May 29 to September 17

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° 90°
22°
High: 31°
Avg: 22°
Low: 13°
Jan
25°
High: 34°
Avg: 25°
Low: 16°
Feb
34°
High: 44°
Avg: 34°
Low: 24°
Mar
42°
High: 54°
Avg: 42°
Low: 31°
Apr
51°
High: 64°
Avg: 51°
Low: 38°
May
59°
High: 74°
Avg: 59°
Low: 44°
Jun
68°
High: 85°
Avg: 68°
Low: 50°
Jul
66°
High: 84°
Avg: 66°
Low: 49°
Aug
57°
High: 73°
Avg: 57°
Low: 41°
Sep
45°
High: 59°
Avg: 45°
Low: 32°
Oct
33°
High: 43°
Avg: 33°
Low: 23°
Nov
23°
High: 32°
Avg: 23°
Low: 14°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.4"
2.2"
2.17"
Jan
2.1"
2.11"
Feb
2.7"
2.74"
Mar
2.8"
2.78"
Apr
3.3"
3.32"
May
3.0"
2.95"
Jun
2.8"
2.80"
Jul
3.4"
3.36"
Aug
3.2"
3.19"
Sep
2.9"
2.93"
Oct
2.1"
2.06"
Nov
1.8"
1.79"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h14h15h15h14h12h11h10h9h
Jan: 7:24 AM – 4:36 PM · 9h 12m
Feb: 6:50 AM – 5:10 PM · 10h 20m
Mar: 6:10 AM – 5:50 PM · 11h 39m
Apr: 5:25 AM – 6:35 PM · 13h 10m
May: 4:47 AM – 7:13 PM · 14h 26m
Jun: 4:27 AM – 7:33 PM · 15h 07m
Jul: 4:35 AM – 7:25 PM · 14h 50m
Aug: 5:08 AM – 6:52 PM · 13h 44m
Sep: 5:52 AM – 6:08 PM · 12h 16m
Oct: 6:36 AM – 5:24 PM · 10h 48m
Nov: 7:14 AM – 4:46 PM · 9h 31m
Dec: 7:33 AM – 4:27 PM · 8h 53m
Daylight Longest: 15h 08m · Shortest: 8h 52m

Nearby Stations

Soda Springs AP, ID Lava Hot Springs, ID May 21 - September 21 Downey, IDMay 31 - September 18 Mccammon, IDMay 23 - September 24 Bern, IDJune 17 - September 3 Preston, IDMay 16 - September 28

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