Carlisle, PA climate
Carlisle has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 23°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Carlisle feels like
Winter
Spring
Summer
Fall
Carlisle 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 | 38° | 23° | 3.0" | 7.7" | 9 | 8 | 21° – 38° |
| February | 42° | 24° | 2.6" | 9.6" | 9 | 11 | 21° – 41° |
| March | 51° | 31° | 3.7" | 4.8" | 9 | 4 | 35° – 51° |
| April | 63° | 41° | 3.8" | 0.2" | 11 | 0 | 48° – 57° |
| May | 73° | 50° | 4.0" | 0 | 15 | 0 | 56° – 68° |
| June | 82° | 60° | 4.1" | 0 | 12 | 0 | 67° – 74° |
| July | 86° | 65° | 4.1" | 0 | 11 | 0 | 71° – 80° |
| August | 84° | 63° | 3.8" | 0 | 11 | 0 | 69° – 77° |
| September | 77° | 56° | 4.6" | 0 | 9 | 0 | 63° – 70° |
| October | 65° | 44° | 3.7" | 0.5" | 11 | 0 | 50° – 61° |
| November | 53° | 35° | 3.2" | 0.9" | 8 | 0 | 38° – 49° |
| December | 43° | 27° | 3.5" | 4.0" | 10 | 3 | 26° – 45° |
| Year | 63° | 43° | 44.1" | 27.7" | 125 | 27 |
“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 Carlisle
Carlisle gets 44 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 125 days a year. Snow covers the ground about 27 days of the year.
About 177 frost-free days a year
In half of years the last 32° night comes by April 23 and the first one by October 18. That leaves about 177 frost-free days for gardens, shorter than 51% of U.S. towns.
Heating and cooling a home in Carlisle
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Carlisle, 87% of that work is heating and 13% 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.
Carlisle and its neighbors
Carlisle borders 3 towns with climate data. January nights across them vary by 0.2°. West Pennsboro has both the coldest January nights (22°) and the hottest July afternoons (86°). Carlisle’s January low is 23° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.