Seven Valleys, PA climate
Seven Valleys has chilly winters and warm summers. A typical July afternoon reaches 85°, a January night drops to 21°, and about 29 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Seven Valleys feels like
Winter
Spring
Summer
Fall
Seven Valleys 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" | 9.8" | 11 | 8 | 21° – 38° |
| February | 42° | 23° | 2.7" | 9.4" | 9 | 10 | 21° – 41° |
| March | 51° | 30° | 3.9" | 5.0" | 11 | 5 | 35° – 50° |
| April | 63° | 40° | 3.6" | 0.2" | 12 | 0 | 47° – 57° |
| May | 73° | 50° | 4.0" | 0 | 13 | 0 | 57° – 67° |
| June | 81° | 59° | 4.0" | 0 | 11 | 0 | 66° – 73° |
| July | 85° | 64° | 4.6" | 0 | 10 | 0 | 70° – 79° |
| August | 84° | 62° | 3.9" | 0 | 10 | 0 | 68° – 76° |
| September | 77° | 55° | 4.9" | 0 | 9 | 0 | 63° – 69° |
| October | 65° | 43° | 4.0" | 0 | 9 | 0 | 50° – 61° |
| November | 53° | 33° | 3.2" | 0.6" | 9 | 0 | 37° – 48° |
| December | 43° | 26° | 3.5" | 3.8" | 10 | 4 | 26° – 46° |
| Year | 63° | 42° | 45.3" | 28.8" | 124 | 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 Seven Valleys
Seven Valleys gets 45 inches of rain and melted snow a year. September is the wettest month and February the driest. Rain or snow falls on about 124 days a year. Snow covers the ground about 27 days of the year.
About 174 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 18. That leaves about 174 frost-free days for gardens, shorter than 56% of U.S. towns.
Heating and cooling a home in Seven Valleys
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Seven Valleys, 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.
Seven Valleys and its neighbors
Seven Valleys borders 2 towns with climate data. January nights across them vary by 0.0°. North Codorus has both the coldest January nights (21°) and the hottest July afternoons (85°). Seven Valleys’s January low is 21° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Seven Valleys 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 Seven Valleys averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.0°). The shift is larger than in 83% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Seven Valleys’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 Seven Valleys’s climate
What is the coldest month in Seven Valleys?
January, with a typical high of 39° and a low of 21°.
What is the hottest month in Seven Valleys?
July, with a typical high of 85° and a low of 64°. About 16 days a year reach 90°.
How much snow does Seven Valleys get?
About 29 inches in a normal winter, most of it in January.
When is the first frost in Seven Valleys?
In half of years the first 32° night comes by October 18, and the last spring frost by April 27.
What is the rainiest month in Seven Valleys?
September, with 4.9 inches of rain and melted snow. The year totals 45 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Seven Valleys itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Spring Grove, PA (5 mi, snow) and York Airport, PA (7 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.