Salmon, ID climate
Salmon has cold winters and warm summers, with very little rain. A typical July afternoon reaches 87°, a January night drops to 14°, and about 22 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Salmon feels like
Winter
Spring
Summer
Fall
Salmon 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 14° | 0.6" | 6.7" | 6 | 22 | 11° – 28° |
| February | 37° | 18° | 0.4" | 3.8" | 5 | 18 | 21° – 34° |
| March | 50° | 27° | 0.5" | 1.2" | 6 | 2 | 34° – 44° |
| April | 59° | 33° | 0.8" | 0.4" | 7 | 0 | 41° – 51° |
| May | 69° | 41° | 1.2" | 0.1" | 9 | 0 | 49° – 60° |
| June | 76° | 47° | 1.5" | 0 | 9 | 0 | 57° – 69° |
| July | 87° | 53° | 0.6" | 0 | 6 | 0 | 60° – 76° |
| August | 86° | 51° | 0.6" | 0 | 5 | 0 | 62° – 72° |
| September | 75° | 43° | 0.9" | 0 | 5 | 0 | 56° – 63° |
| October | 59° | 33° | 0.7" | 0.1" | 6 | 0 | 37° – 52° |
| November | 42° | 24° | 0.6" | 3.3" | 6 | 3 | 25° – 39° |
| December | 30° | 15° | 0.6" | 6.4" | 7 | 16 | 15° – 28° |
| Year | 58° | 33° | 8.9" | 22.0" | 78 | 62 |
“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 Salmon
Salmon gets 9 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 78 days a year. Snow covers the ground about 62 days of the year.
About 127 frost-free days a year
In half of years the last 32° night comes by May 17 and the first one by September 24. That leaves about 127 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Salmon
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Salmon, 96% of that work is heating and 4% 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 Salmon 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 Salmon averaged 1.5° warmer than the 1900s. The biggest change is in January (+3.3°). The shift is larger than in 68% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Salmon’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from 11° to 28°. September is the most reliable, staying within 8°.
Common questions about Salmon’s climate
What is the coldest month in Salmon?
January, with a typical high of 30° and a low of 14°.
What is the hottest month in Salmon?
July, with a typical high of 87° and a low of 53°. About 25 days a year reach 90°.
How much snow does Salmon get?
About 22 inches in a normal winter, most of it in January.
When is the first frost in Salmon?
In half of years the first 32° night comes by September 24, and the last spring frost by May 17.
What is the rainiest month in Salmon?
June, with 1.5 inches of rain and melted snow. The year totals 9 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Salmon itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Salmon-ksra, ID (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.