Conewago has chilly winters and warm summers
A typical July afternoon reaches 86°, a January night drops to 22°, and about 24 inches of snow falls in a normal winter.
A year in Conewago at a glance
Each month’s typical high and low, and what it brings.
What stands out about Conewago’s climate
Read from where Conewago sits among Pennsylvania’s towns. The page puts what stands out first.
Living with Conewago’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
206 frost-free days. The last frost comes by Apr 9 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 2.
About 24" a winter over 5 days with an inch or more, most in February. Snow covers the ground about 19 days a year.
Months averaging under 55° run from October through April. Heating is 81% of the year’s heating-and-cooling load.
About 22 days a year reach 90°, and July afternoons average 86°.
The nicest months are April, May, June, August, September and October. 0.3 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →What a year in Conewago feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Warmer than it used to be
The last 30 years in Conewago averaged 1.9° warmer than the 1900s. The biggest change is in December (+3.1°).
A bigger shift than in 90% of U.S. towns.
Change by month
24 inches of snow, 44 of rain and melt
September is the wettest month and February the driest. Rain or snow falls on about 120 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 206 frost-free days a year
In half of years the last 32° night comes by April 9 and the first by November 2.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Conewago and its neighbors
Manchester has the coldest January nights next door (22°) and Manchester the hottest July afternoons (86°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
How Conewago compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
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 | 38° | 22° | 3.0" | 7.0" | 10 | 5 | 20° – 38° |
| February | 42° | 24° | 2.5" | 8.8" | 9 | 8 | 21° – 41° |
| March | 51° | 31° | 3.7" | 3.0" | 10 | 3 | 35° – 51° |
| April | 63° | 41° | 3.6" | 0 | 11 | 0 | 48° – 57° |
| May | 73° | 51° | 3.9" | 0 | 13 | 0 | 57° – 68° |
| June | 81° | 60° | 4.0" | 0 | 10 | 0 | 67° – 74° |
| July | 86° | 65° | 4.4" | 0 | 11 | 0 | 70° – 80° |
| August | 84° | 63° | 3.9" | 0 | 10 | 0 | 69° – 77° |
| September | 77° | 56° | 4.6" | 0 | 8 | 0 | 63° – 70° |
| October | 65° | 44° | 3.9" | 0 | 9 | 0 | 50° – 62° |
| November | 53° | 34° | 3.1" | 0.1" | 9 | 0 | 38° – 49° |
| December | 43° | 27° | 3.4" | 4.8" | 10 | 3 | 26° – 46° |
| Year | 63° | 43° | 44.0" | 23.7" | 120 | 19 |
Heating and cooling a home in Conewago
81% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 21° to 41°. 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 38° and a low of 22°.
What is the hottest month in Conewago?
July, with a typical high of 86° and a low of 65°. About 22 days a year reach 90°.
How much snow does Conewago get?
About 24 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 November 2, and the last spring frost by April 9.
What is the rainiest month in Conewago?
September, with 4.6 inches of rain and melted snow. The year totals 44 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Conewago.
Your answer becomes a post in Town Square.
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 York Haven, PA (6 mi, snow) and Middletown Harrisburg Intl Airport, PA (9 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. Today’s forecast: National Weather Service.