Photo: Leaflet · Public domainHailey gets about 102 inches of snow a winter, more than 97% of U.S. towns
A typical July afternoon reaches 84°, a January night drops to 10°, and about 102 inches of snow falls in a normal winter.
A year in Hailey at a glance
Each month’s typical high and low, and what it brings.
What stands out about Hailey’s climate
Compared with towns across the U.S., with Hailey’s place in Idaho beside it.
What a year in Hailey feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 139 frost-free days a year
In half of years the last 32° night comes by May 13 and the first by October 2. Frost and day counts come from Bellevue, ID, 4 miles away.
The 2023 USDA map puts Hailey’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −9°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 102 inches of snow a winter
Snow, measured at Ketchum Rs, ID, falls mostly in December. Precipitation (rain plus melted snow) adds up to 14 inches a year; December is the wettest month and August the driest. Rain or snow falls on about 84 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Hailey
94% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Bellevue, ID.
Living with Hailey’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
139 frost-free days in zone 6a. The last frost comes by May 13 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 2.
Months with highs of 62–84° and lows of 40° or more: June and August. 7.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Hailey from natural hazards, avalanches are the largest share (74%); heat waves, cold waves, winter storms and ice storms together are 8%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Hailey and similar climates
TownRatings has no climate map of the towns around Hailey yet.
Climates most like Hailey’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Hailey, ID | 10° | 84° | 14" | 102" |
| Belgrade, MT | 13° | 85° | 14" | 91" |
| Craig, CO | 6° | 86° | 14" | 113" |
| Flagstaff, AZ | 16° | 84° | 18" | 90" |
| Heber, UT | 12° | 88° | 15" | 75" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Hailey averaged 1.4° warmer than the 1900s. The biggest change is in March (+2.8°).
A bigger shift than in 56% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Hailey compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Hailey’s place among Idaho’s.
Hailey weather by month
Highs, lows and precipitation from NOAA’s grid at Hailey’s center; snow, wet days and snow on the ground from Ketchum Rs, ID. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 31° | 10° | 1.7" | 27.0" | 10 | 14° – 27° |
| February | 35° | 14° | 1.5" | 17.2" | 9 | 18° – 32° |
| March | 44° | 22° | 1.3" | 10.5" | 8 | 28° – 40° |
| April | 54° | 29° | 1.0" | 3.2" | 7 | 35° – 47° |
| May | 65° | 36° | 1.6" | 0.2" | 8 | 44° – 57° |
| June | 74° | 43° | 1.1" | 0.0" | 7 | 53° – 65° |
| July | 84° | 50° | 0.4" | 0.0" | 4 | 57° – 73° |
| August | 83° | 48° | 0.4" | 0.0" | 4 | 60° – 69° |
| September | 73° | 39° | 0.7" | 0.0" | 4 | 53° – 60° |
| October | 59° | 30° | 1.0" | 1.6" | 5 | 36° – 51° |
| November | 42° | 21° | 1.2" | 10.3" | 6 | 22° – 38° |
| December | 31° | 11° | 2.0" | 32.0" | 11 | 15° – 25° |
| Year | 56° | 29° | 13.8" | 102.0" | 84 |
How much a month can swing
A normal is an average. July swings the most: from 1991 to 2020 its average ranged from 57° to 73°. September is the most reliable, staying within 8°.
Where Hailey’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Hailey’s center.
- Snow: Ketchum Rs, ID.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Bellevue, ID, 4 miles from the town’s center, 150 ft lower; no station nearby passes every check; this is the nearest one in the same valley, flagged above.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Hailey’s climate
What is the weather like in Hailey?
A typical July afternoon reaches 84°, a January night drops to 10°, and about 102 inches of snow falls in a normal winter. Colder January nights than 93% of U.S. towns; cooler July afternoons than 56% of U.S. towns.
How cold does it get in Hailey in winter?
January nights average 10°. About 154 nights a year reach 32° or below and 3 reach 0° or below. In the coldest January of the last 30 years the month averaged 14°.
How much snow does Hailey get?
About 102 inches in a normal winter at Ketchum Rs, ID, most of it in December.
How hot does it get in Hailey?
July, with a typical high of 84° and a low of 50°. About 24 days a year reach 90° (Bellevue, ID).
When is the first and last frost in Hailey?
In half of years the last spring frost (32°) comes by May 13 and the first fall frost by October 2, about 139 frost-free days, at Bellevue, ID.
What growing zone is Hailey in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −9°.
What is the best time of year to visit Hailey?
By one simple rule (highs of 62–84° and lows of 40° or more), June and August. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Hailey getting warmer?
Yes: 1991–2020 averaged 1.4° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 56% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Hailey.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.