Hailey, ID climate
Hailey has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 10°, and about 102 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Hailey feels like
Winter
Spring
Summer
Fall
Hailey weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 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 | 7 | 53° – 65° |
| July | 84° | 50° | 0.4" | 0 | 4 | 57° – 73° |
| August | 83° | 48° | 0.4" | 0 | 4 | 60° – 69° |
| September | 73° | 39° | 0.7" | 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 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Hailey
Hailey gets 14 inches of rain and melted snow a year. December is the wettest month and August the driest. Rain or snow falls on about 84 days a year.
A year-round growing season
Heating and cooling a home in Hailey
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Hailey, 99% of that work is heating and 1% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
How Hailey compares
Compared with every U.S. town and city on TownTapestry, each counted once.
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°). The shift is larger than in 67% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Hailey’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. July swings the most: between 1991 and 2020 its average temperature ranged from 57° to 73°. September is the most reliable, staying within 8°.
Common questions about Hailey’s climate
What is the coldest month in Hailey?
January, with a typical high of 31° and a low of 10°.
What is the hottest month in Hailey?
July, with a typical high of 84° and a low of 50°. About 4 days a year reach 90°.
How much snow does Hailey get?
About 102 inches in a normal winter, most of it in December.
When is the first frost in Hailey?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in Hailey?
December, with 2.0 inches of rain and melted snow. The year totals 14 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Hailey itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ketchum Rs, ID (12 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.