Aldan, PA climate
Aldan has chilly winters and warm summers. A typical July afternoon reaches 87°, a January night drops to 26°, and about 23 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Aldan feels like
Winter
Spring
Summer
Fall
Aldan 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° | 26° | 3.3" | 7.1" | 11 | 5 | 25° – 41° |
| February | 44° | 27° | 2.8" | 8.4" | 10 | 6 | 24° – 43° |
| March | 52° | 34° | 4.1" | 3.6" | 11 | 2 | 38° – 51° |
| April | 65° | 43° | 3.7" | 0.3" | 11 | 0 | 50° – 59° |
| May | 74° | 53° | 3.6" | 0 | 11 | 0 | 59° – 69° |
| June | 83° | 63° | 4.3" | 0 | 10 | 0 | 69° – 77° |
| July | 87° | 68° | 4.7" | 0 | 10 | 0 | 73° – 81° |
| August | 85° | 66° | 4.4" | 0 | 9 | 0 | 71° – 80° |
| September | 79° | 59° | 4.6" | 0 | 9 | 0 | 65° – 73° |
| October | 67° | 48° | 3.8" | 0 | 9 | 0 | 53° – 64° |
| November | 56° | 38° | 3.2" | 0.2" | 9 | 0 | 41° – 52° |
| December | 46° | 31° | 4.1" | 3.5" | 11 | 3 | 30° – 50° |
| Year | 65° | 46° | 46.6" | 23.1" | 121 | 16 |
“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 Aldan
Aldan gets 47 inches of rain and melted snow a year. July is the wettest month and February the driest. Rain or snow falls on about 121 days a year. Snow covers the ground about 16 days of the year.
About 224 frost-free days a year
In half of years the last 32° night comes by April 2 and the first one by November 10. That leaves about 224 frost-free days for gardens, longer than 84% of U.S. towns.
Heating and cooling a home in Aldan
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Aldan, 77% of that work is heating and 23% is cooling.
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.
Aldan and its neighbors
Aldan borders 3 towns with climate data. January nights across them vary by 0.9°. Clifton Heights has the coldest January nights (25°) and Collingdale the hottest July afternoons (88°). Aldan’s January low is 26° and its July high 87°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Aldan 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 Aldan averaged 2.0° warmer than the 1900s. The biggest change is in December (+3.6°). The shift is larger than in 94% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Aldan’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. December swings the most: between 1991 and 2020 its average temperature ranged from 30° to 50°. June is the most reliable, staying within 8°.
Common questions about Aldan’s climate
What is the coldest month in Aldan?
January, with a typical high of 41° and a low of 26°.
What is the hottest month in Aldan?
July, with a typical high of 87° and a low of 68°. About 30 days a year reach 90°.
How much snow does Aldan get?
About 23 inches in a normal winter, most of it in February.
When is the first frost in Aldan?
In half of years the first 32° night comes by November 10, and the last spring frost by April 2.
What is the rainiest month in Aldan?
July, with 4.7 inches of rain and melted snow. The year totals 47 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Aldan itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Philadelphia Intl Airport, PA (5 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.