Frost Dates for Hailey, ID

Based on data from Bellevue weather station, 5 miles away

Elevation: 5318 ft

Frost Dates

Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. May 13
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. October 2

30% Probability

Only 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 May 19
First Fall Frost September 25

Hard Freeze (28°F)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 14
43.52°N, 114.32°W © OpenStreetMap

Growing Season

142 Days May 13 to October 2

USDA Hardiness Zone

Hardiness 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

Avg. annual minimum: −15 to −10°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsb Warm-Summer Continental (Dry Summer)

Warm, dry summers and cold, snowy winters. Common in mountain regions. Moderate growing season with irrigation needs in summer.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January35°25°16°
February38°28°19°
March48°38°27°
April59°47°35°
May67°54°41°
June77°62°47°
July88°71°54°
August86°69°53°
September76°60°45°
October61°48°35°
November45°35°25°
December34°25°17°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January5.5
February4.3
March4.5
April4.1
May4.6
June3.0
July0.0
August0.0
September1.9
October4.6
November3.6
December4.7

Sunrise / Sunset

Daylight Mountain Time (MT) Longest: 15h 14m · Shortest: 8h 46m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Mountain Time (MT))
Month Sunrise Sunset Daylight
January8:13 AM5:20 PM9h 07m
February7:43 AM5:60 PM10h 17m
March7:57 AM7:36 PM11h 39m
April7:01 AM8:13 PM13h 12m
May6:18 AM8:49 PM14h 31m
June6:01 AM9:14 PM15h 13m
July6:15 AM9:10 PM14h 56m
August6:47 AM8:35 PM13h 48m
September7:23 AM7:40 PM12h 17m
October7:59 AM6:45 PM10h 46m
November7:39 AM5:05 PM9h 26m
December8:09 AM4:56 PM8h 47m

Nearby Stations

Picabo, IDJune 16 - September 9 Ketchum Rs, ID Fairfield Rs, ID June 8 - September 14 Richfield, ID May 24 - September 26 Craters Of The Moon, ID June 19 - September 9 Arco 17 Sw, IDMay 24 - October 1

Plan Your Garden with Planter

Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.

Try Planter For Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview