Marblemount, WA climate
Marblemount has mild winters and pleasant summers, with plenty of rain. A typical July afternoon reaches 78°, a January night drops to 33°, and about 30 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Marblemount feels like
Winter
Spring
Summer
Fall
Marblemount 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 | 41° | 33° | 10.3" | 10.2" | 19 | 12 | 30° – 42° |
| February | 45° | 33° | 6.4" | 7.7" | 15 | 6 | 32° – 45° |
| March | 51° | 35° | 8.2" | 2.8" | 19 | 3 | 38° – 51° |
| April | 59° | 39° | 5.6" | 0.1" | 17 | 0 | 44° – 55° |
| May | 67° | 45° | 4.3" | 0 | 13 | 0 | 51° – 61° |
| June | 71° | 50° | 3.7" | 0 | 13 | 0 | 56° – 67° |
| July | 78° | 54° | 1.9" | 0 | 7 | 0 | 61° – 70° |
| August | 79° | 54° | 2.0" | 0 | 7 | 0 | 60° – 70° |
| September | 72° | 50° | 4.2" | 0 | 11 | 0 | 57° – 64° |
| October | 59° | 43° | 8.1" | 0 | 17 | 0 | 47° – 55° |
| November | 47° | 37° | 11.2" | 2.4" | 21 | 1 | 37° – 46° |
| December | 40° | 33° | 9.7" | 6.3" | 19 | 6 | 32° – 40° |
| Year | 59° | 42° | 75.5" | 29.5" | 177 | 28 |
“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 Marblemount
Marblemount gets 76 inches of rain and melted snow a year. November is the wettest month and July the driest. Rain or snow falls on about 177 days a year. Snow covers the ground about 28 days of the year.
About 192 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by October 25. That leaves about 192 frost-free days for gardens, longer than 66% of U.S. towns.
Heating and cooling a home in Marblemount
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Marblemount, 98% of that work is heating and 2% 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 Marblemount 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 Marblemount averaged 1.2° warmer than the 1900s. The biggest change is in January (+3.3°). The shift is smaller than in 56% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Marblemount’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 32° to 45°. September is the most reliable, staying within 8°.
Common questions about Marblemount’s climate
What is the coldest month in Marblemount?
January, with a typical high of 41° and a low of 33°.
What is the hottest month in Marblemount?
August, with a typical high of 79° and a low of 54°. About 7 days a year reach 90°.
How much snow does Marblemount get?
About 30 inches in a normal winter, most of it in January.
When is the first frost in Marblemount?
In half of years the first 32° night comes by October 25, and the last spring frost by April 16.
What is the rainiest month in Marblemount?
November, with 11.2 inches of rain and melted snow. The year totals 76 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Marblemount itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Newhalem, WA (13 mi, snow) and Darrington 21 Nne, WA (1 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.