Port Alsworth, AK climate
Port Alsworth has cold, snowy winters and cool summers, with very little rain. A typical July afternoon reaches 69°, a January night drops to 10°, and about 88 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Port Alsworth feels like
Winter
Spring
Summer
Fall
Port Alsworth 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 |
|---|---|---|---|---|---|---|
| January | 24° | 10° | 0.7" | 13.9" | 8 | 22 |
| February | 30° | 15° | 0.9" | 13.1" | 7 | 18 |
| March | 35° | 15° | 0.6" | 12.1" | 6 | 23 |
| April | 47° | 30° | 0.5" | 7.2" | 5 | 7 |
| May | 59° | 39° | 0.4" | 0.8" | 4 | 0 |
| June | 67° | 47° | 0.7" | 0 | 6 | 0 |
| July | 69° | 52° | 1.4" | 0 | 9 | 0 |
| August | 66° | 49° | 1.7" | 0 | 11 | 0 |
| September | 57° | 42° | 2.6" | 0.3" | 11 | 0 |
| October | 44° | 32° | 1.3" | 4.9" | 9 | 5 |
| November | 32° | 21° | 1.3" | 17.3" | 10 | 16 |
| December | 27° | 15° | 1.0" | 18.3" | 10 | 23 |
| Year | 46° | 30° | 13.1" | 87.9" | 95 | 112 |
“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 Port Alsworth
Port Alsworth gets 13 inches of rain and melted snow a year. September is the wettest month and May the driest. Rain or snow falls on about 95 days a year. Snow covers the ground about 112 days of the year.
About 134 frost-free days a year
In half of years the last 32° night comes by May 12 and the first one by September 24. That leaves about 134 frost-free days for gardens, shorter than 93% of U.S. towns.
Heating and cooling a home in Port Alsworth
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Port Alsworth, 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 Port Alsworth compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Common questions about Port Alsworth’s climate
What is the coldest month in Port Alsworth?
January, with a typical high of 24° and a low of 10°.
What is the hottest month in Port Alsworth?
July, with a typical high of 69° and a low of 52°.
How much snow does Port Alsworth get?
About 88 inches in a normal winter, most of it in December.
When is the first frost in Port Alsworth?
In half of years the first 32° night comes by September 24, and the last spring frost by May 12.
What is the rainiest month in Port Alsworth?
September, with 2.6 inches of rain and melted snow. The year totals 13 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 Port Alsworth, AK (3 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020.