Glennallen, AK climate
Glennallen has cold winters and cool summers, with very little rain. A typical July afternoon reaches 69°, a January night drops to -12°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Glennallen feels like
Winter
Spring
Summer
Fall
Glennallen weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt |
|---|---|---|---|
| January | 5° | -12° | 0.7" |
| February | 16° | -5° | 0.7" |
| March | 28° | 1° | 0.3" |
| April | 44° | 21° | 0.2" |
| May | 58° | 33° | 0.8" |
| June | 67° | 43° | 1.4" |
| July | 69° | 47° | 1.7" |
| August | 65° | 43° | 1.9" |
| September | 54° | 33° | 1.4" |
| October | 36° | 18° | 1.0" |
| November | 15° | -1° | 0.9" |
| December | 8° | -8° | 0.8" |
| Year | 39° | 18° | 11.8" |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more.
Rain and snow in Glennallen
Glennallen gets 12 inches of rain and melted snow a year. August is the wettest month and April the driest.
About 73 frost-free days a year
In half of years the last 32° night comes by June 7 and the first one by August 21. That leaves about 73 frost-free days for gardens, shorter than 100% of U.S. towns.
Heating and cooling a home in Glennallen
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Glennallen, 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.
Glennallen and its neighbors
Glennallen borders 3 towns with climate data. January nights across them vary by 2.7°. Tolsona has both the coldest January nights (-14°) and the hottest July afternoons (70°). Glennallen’s January low is -12° and its July high 69°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Glennallen compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Glennallen’s climate
What is the coldest month in Glennallen?
January, with a typical high of 5° and a low of -12°.
What is the hottest month in Glennallen?
July, with a typical high of 69° and a low of 47°.
When is the first frost in Glennallen?
In half of years the first 32° night comes by August 21, and the last spring frost by June 7.
What is the rainiest month in Glennallen?
August, with 1.9 inches of rain and melted snow. The year totals 12 inches.
NOAA’s gridded normals don’t cover this state, so temperatures and rainfall come from the nearest weather station. Snow, frost dates and day counts come from NOAA’s weather station at Gulkana Airport, AK (12 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.