Armstrong, PA climate
Armstrong has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 82°, a January night drops to 18°, and about 36 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Armstrong feels like
Winter
Spring
Summer
Fall
Armstrong 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 | 33° | 18° | 3.3" | 9.7" | 12 | 11 | 16° – 33° |
| February | 37° | 19° | 2.5" | 9.3" | 10 | 13 | 16° – 35° |
| March | 46° | 27° | 3.5" | 7.3" | 12 | 6 | 30° – 47° |
| April | 60° | 37° | 3.9" | 0.8" | 12 | 0 | 43° – 54° |
| May | 70° | 48° | 3.9" | 0 | 14 | 0 | 53° – 64° |
| June | 78° | 56° | 4.3" | 0 | 12 | 0 | 63° – 70° |
| July | 82° | 60° | 4.6" | 0 | 12 | 0 | 67° – 75° |
| August | 80° | 60° | 4.0" | 0 | 11 | 0 | 66° – 74° |
| September | 73° | 53° | 4.6" | 0 | 10 | 0 | 60° – 67° |
| October | 61° | 42° | 4.0" | 0.1" | 11 | 0 | 47° – 58° |
| November | 48° | 32° | 3.3" | 1.7" | 10 | 1 | 35° – 45° |
| December | 38° | 23° | 3.5" | 6.9" | 12 | 6 | 22° – 40° |
| Year | 59° | 39° | 45.3" | 35.8" | 137 | 37 |
“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 Armstrong
Armstrong gets 45 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 137 days a year. Snow covers the ground about 37 days of the year.
About 180 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 23. That leaves about 180 frost-free days for gardens, longer than 53% of U.S. towns.
Heating and cooling a home in Armstrong
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Armstrong, 88% of that work is heating and 12% 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.
Armstrong and its neighbors
Armstrong borders 8 towns with climate data. January nights across them vary by 1.8°. Washington has the coldest January nights (18°) and South Williamsport the hottest July afternoons (85°). Armstrong’s January low is 18° and its July high 82°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Armstrong 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 Armstrong averaged 1.3° warmer than the 1900s. The biggest change is in December (+2.8°). The shift is larger than in 58% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Armstrong’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 16° to 35°. June is the most reliable, staying within 7°.
Common questions about Armstrong’s climate
What is the coldest month in Armstrong?
January, with a typical high of 33° and a low of 18°.
What is the hottest month in Armstrong?
July, with a typical high of 82° and a low of 60°. About 17 days a year reach 90°.
How much snow does Armstrong get?
About 36 inches in a normal winter, most of it in January.
When is the first frost in Armstrong?
In half of years the first 32° night comes by October 23, and the last spring frost by April 24.
What is the rainiest month in Armstrong?
July, with 4.6 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Armstrong itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Williamsport, PA (6 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.