Alpine Northwest has cold winters and pleasant summers, with very little rain
A typical July afternoon reaches 83°, a January night drops to 9°.
A year in Alpine Northwest at a glance
Each month’s typical high and low, and what it brings.
What a year in Alpine Northwest feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Rain and snow in Alpine Northwest
May is the wettest month and July the driest.
Rain + melted snow by month
Inches of water
Snowfall by month
No snow records from a nearby station.
A year-round growing season
Freezing nights are uncommon in Alpine Northwest.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Alpine Northwest’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
Only 100% of years see a freezing night, so tender plants can stay out most winters.
Months averaging under 55° run from September through May. Heating is 98% of the year’s heating-and-cooling load.
About 14 days a year reach 90°, and July afternoons average 83°.
The nicest months are June, July and August.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Warmer than it used to be
The last 30 years in Alpine Northwest averaged 1.3° warmer than the 1900s. The biggest change is in March (+3.3°).
A bigger shift than in 56% of U.S. towns.
Change by month
How Alpine Northwest compares
Against every U.S. town on TownTapestry, each counted once, with its place in Wyoming.
Alpine Northwest weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 29° | 9° | 1.5" | 13° – 25° |
| February | 33° | 11° | 1.2" | 18° – 29° |
| March | 43° | 20° | 1.2" | 26° – 37° |
| April | 53° | 27° | 1.3" | 34° – 45° |
| May | 64° | 35° | 1.9" | 43° – 54° |
| June | 73° | 41° | 1.5" | 52° – 63° |
| July | 83° | 46° | 0.8" | 55° – 70° |
| August | 82° | 45° | 1.1" | 58° – 66° |
| September | 72° | 37° | 1.3" | 51° – 58° |
| October | 58° | 28° | 1.4" | 34° – 49° |
| November | 41° | 19° | 1.4" | 22° – 38° |
| December | 29° | 10° | 1.6" | 15° – 25° |
| Year | 55° | 27° | 16.1" |
Heating and cooling a home in Alpine Northwest
98% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. November swings the most: from 1991 to 2020 its average ranged from 22° to 38°. September is the most reliable, staying within 8°.
Common questions about Alpine Northwest’s climate
What is the coldest month in Alpine Northwest?
January, with a typical high of 29° and a low of 9°.
What is the hottest month in Alpine Northwest?
July, with a typical high of 83° and a low of 46°. About 14 days a year reach 90°.
When is the first frost in Alpine Northwest?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in Alpine Northwest?
May, with 1.9 inches of rain and melted snow. The year totals 16 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Alpine Northwest.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Alpine Northwest itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Swan Valley, ID (21 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.