Conewago, PA climate
Conewago has chilly winters and warm summers. A typical July afternoon reaches 86°, a January night drops to 21°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Conewago feels like
Winter
Spring
Summer
Fall
Conewago 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 | 39° | 21° | 3.1" | 8.0" | 10 | 10 | 21° – 39° |
| February | 43° | 23° | 2.6" | 9.7" | 9 | 11 | 22° – 41° |
| March | 52° | 30° | 3.9" | 5.2" | 11 | 4 | 35° – 51° |
| April | 64° | 40° | 3.6" | 0.1" | 13 | 0 | 48° – 57° |
| May | 73° | 50° | 4.0" | 0 | 14 | 0 | 57° – 68° |
| June | 82° | 59° | 4.0" | 0 | 12 | 0 | 66° – 74° |
| July | 86° | 64° | 4.4" | 0 | 11 | 0 | 70° – 79° |
| August | 84° | 62° | 3.6" | 0 | 10 | 0 | 69° – 76° |
| September | 77° | 55° | 4.7" | 0 | 10 | 0 | 63° – 70° |
| October | 66° | 43° | 3.8" | 0.1" | 10 | 0 | 50° – 61° |
| November | 54° | 33° | 3.1" | 0.6" | 9 | 0 | 37° – 48° |
| December | 44° | 26° | 3.5" | 4.5" | 10 | 5 | 26° – 46° |
| Year | 64° | 42° | 44.2" | 28.2" | 128 | 30 |
“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 Conewago
Conewago 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 128 days a year. Snow covers the ground about 30 days of the year.
About 177 frost-free days a year
In half of years the last 32° night comes by April 24 and the first one by October 20. That leaves about 177 frost-free days for gardens, shorter than 51% of U.S. towns.
Heating and cooling a home in Conewago
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Conewago, 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.
Conewago and its neighbors
Conewago borders 5 towns with climate data. January nights across them vary by 0.3°. Penn has the coldest January nights (21°) and Oxford the hottest July afternoons (86°). Conewago’s January low is 21° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Conewago 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 Conewago averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.1°). The shift is larger than in 81% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Conewago’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 26° to 46°. September is the most reliable, staying within 7°.
Common questions about Conewago’s climate
What is the coldest month in Conewago?
January, with a typical high of 39° and a low of 21°.
What is the hottest month in Conewago?
July, with a typical high of 86° and a low of 64°. About 18 days a year reach 90°.
How much snow does Conewago get?
About 28 inches in a normal winter, most of it in February.
When is the first frost in Conewago?
In half of years the first 32° night comes by October 20, and the last spring frost by April 24.
What is the rainiest month in Conewago?
September, with 4.7 inches of rain and melted snow. The year totals 44 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Conewago itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Hanover 4 Sw, PA (2 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.