Alpine, CO climate
Alpine has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 78°, a January night drops to 0°, and about 35 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Alpine feels like
Winter
Spring
Summer
Fall
Alpine 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 | 34° | 0° | 0.5" | 6.0" | 4 | 21 | 11° – 24° |
| February | 37° | 5° | 0.5" | 4.5" | 4 | 16 | 16° – 28° |
| March | 47° | 15° | 0.6" | 6.5" | 4 | 6 | 26° – 37° |
| April | 55° | 23° | 0.7" | 4.8" | 4 | 2 | 34° – 43° |
| May | 64° | 30° | 0.8" | 1.2" | 5 | 0 | 42° – 51° |
| June | 74° | 36° | 0.5" | 0 | 4 | 0 | 51° – 59° |
| July | 78° | 43° | 1.4" | 0 | 10 | 0 | 57° – 64° |
| August | 76° | 42° | 1.7" | 0 | 11 | 0 | 56° – 61° |
| September | 70° | 35° | 1.1" | 0 | 7 | 0 | 48° – 56° |
| October | 60° | 24° | 1.0" | 2.8" | 5 | 1 | 37° – 46° |
| November | 46° | 13° | 0.6" | 3.9" | 3 | 4 | 22° – 38° |
| December | 35° | 1° | 0.6" | 5.7" | 4 | 14 | 13° – 26° |
| Year | 56° | 22° | 10.1" | 35.4" | 65 | 64 |
“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 Alpine
Alpine gets 10 inches of rain and melted snow a year. August is the wettest month and February the driest. Rain or snow falls on about 65 days a year. Snow covers the ground about 64 days of the year.
About 92 frost-free days a year
In half of years the last 32° night comes by June 11 and the first one by September 13. That leaves about 92 frost-free days for gardens, shorter than 99% of U.S. towns.
Heating and cooling a home in Alpine
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Alpine, 100% of that work is heating and 0% 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 Alpine 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 Alpine averaged 1.4° warmer than the 1900s. The biggest change is in March (+2.9°). The shift is larger than in 67% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Alpine’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 22° to 38°. August is the most reliable, staying within 5°.
Common questions about Alpine’s climate
What is the coldest month in Alpine?
January, with a typical high of 34° and a low of 0°.
What is the hottest month in Alpine?
July, with a typical high of 78° and a low of 43°.
How much snow does Alpine get?
About 35 inches in a normal winter, most of it in March.
When is the first frost in Alpine?
In half of years the first 32° night comes by September 13, and the last spring frost by June 11.
What is the rainiest month in Alpine?
August, with 1.7 inches of rain and melted snow. The year totals 10 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Alpine itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Monte Vista 2w, CO (23 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.