South Manheim, PA climate
South Manheim has chilly winters and warm summers, with plenty of rain. A typical July afternoon reaches 85°, a January night drops to 20°, and about 21 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in South Manheim feels like
Winter
Spring
Summer
Fall
South Manheim 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 | 37° | 20° | 3.6" | 5.1" | 11 | 10 | 19° – 36° |
| February | 40° | 22° | 2.8" | 7.1" | 9 | 11 | 19° – 38° |
| March | 48° | 29° | 3.9" | 4.6" | 10 | 4 | 31° – 47° |
| April | 62° | 38° | 4.1" | 0.3" | 12 | 0 | 45° – 55° |
| May | 72° | 48° | 4.1" | 0 | 14 | 0 | 55° – 66° |
| June | 80° | 58° | 4.7" | 0 | 12 | 0 | 66° – 72° |
| July | 85° | 63° | 4.9" | 0 | 11 | 0 | 69° – 78° |
| August | 83° | 61° | 4.7" | 0 | 11 | 0 | 67° – 75° |
| September | 76° | 53° | 5.0" | 0 | 10 | 0 | 61° – 69° |
| October | 64° | 42° | 4.5" | 0 | 11 | 0 | 47° – 60° |
| November | 52° | 33° | 3.5" | 0.5" | 9 | 0 | 37° – 47° |
| December | 41° | 26° | 4.0" | 3.7" | 11 | 4 | 25° – 44° |
| Year | 61° | 41° | 49.8" | 21.3" | 133 | 29 |
“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 South Manheim
South Manheim gets 50 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 133 days a year. Snow covers the ground about 29 days of the year.
About 189 frost-free days a year
In half of years the last 32° night comes by April 16 and the first one by October 25. That leaves about 189 frost-free days for gardens, longer than 63% of U.S. towns.
Heating and cooling a home in South Manheim
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In South Manheim, 86% of that work is heating and 14% 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.
South Manheim and its neighbors
South Manheim borders 8 towns with climate data. January nights across them vary by 1.3°. North Manheim has the coldest January nights (19°) and Tilden the hottest July afternoons (86°). South Manheim’s January low is 20° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How South Manheim 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 South Manheim averaged 1.5° warmer than the 1900s. The biggest change is in December (+3.2°). The shift is larger than in 68% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at South Manheim’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 19° to 38°. June is the most reliable, staying within 6°.
Common questions about South Manheim’s climate
What is the coldest month in South Manheim?
January, with a typical high of 37° and a low of 20°.
What is the hottest month in South Manheim?
July, with a typical high of 85° and a low of 63°. About 17 days a year reach 90°.
How much snow does South Manheim get?
About 21 inches in a normal winter, most of it in February.
When is the first frost in South Manheim?
In half of years the first 32° night comes by October 25, and the last spring frost by April 16.
What is the rainiest month in South Manheim?
September, with 5.0 inches of rain and melted snow. The year totals 50 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Manheim itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Hamburg, PA (9 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.