West Deer has chilly winters and pleasant summers
A typical July afternoon reaches 84°, a January night drops to 20°, and about 29 inches of snow falls in a normal winter.
A year in West Deer at a glance
Each month’s typical high and low, and what it brings.
What stands out about West Deer’s climate
Read from where West Deer sits among Pennsylvania’s towns. The page puts what stands out first.
Living with West Deer’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
199 frost-free days. The last frost comes by Apr 16 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 29" a winter over 12 days with an inch or more, most in February.
Months averaging under 55° run from October through April. Heating is 88% of the year’s heating-and-cooling load.
About 14 days a year reach 90°, and July afternoons average 84°.
The nicest months are May, June, July, August, September and October. 25 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 West Deer feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
29 inches of snow, 42 of rain and melt
June is the wettest month and February the driest. Rain or snow falls on about 168 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 199 frost-free days a year
In half of years the last 32° night comes by April 16 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
West Deer and its neighbors
Middlesex has the coldest January nights next door (20°) and Indiana the hottest July afternoons (84°). 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.
Warmer than it used to be
The last 30 years in West Deer averaged 1.2° warmer than the 1900s. The biggest change is in December (+2.4°).
A smaller shift than in 53% of U.S. towns.
Change by month
How West Deer compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
West Deer 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 36° | 20° | 3.1" | 7.1" | 18 | 20° – 38° |
| February | 40° | 22° | 2.4" | 8.2" | 14 | 18° – 40° |
| March | 49° | 29° | 3.3" | 5.5" | 14 | 33° – 50° |
| April | 63° | 38° | 3.5" | 0.3" | 15 | 45° – 56° |
| May | 72° | 48° | 3.9" | 0 | 15 | 53° – 67° |
| June | 80° | 57° | 4.6" | 0 | 14 | 64° – 71° |
| July | 84° | 61° | 4.4" | 0 | 13 | 68° – 76° |
| August | 82° | 60° | 3.7" | 0 | 12 | 67° – 75° |
| September | 76° | 53° | 3.8" | 0 | 12 | 61° – 69° |
| October | 64° | 42° | 3.1" | 0 | 13 | 49° – 59° |
| November | 52° | 33° | 3.1" | 1.8" | 13 | 36° – 48° |
| December | 41° | 26° | 3.3" | 5.7" | 16 | 23° – 44° |
| Year | 62° | 41° | 42.2" | 28.6" | 168 |
Heating and cooling a home in West Deer
88% 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 18° to 40°. June is the most reliable, staying within 7°.
Common questions about West Deer’s climate
What is the coldest month in West Deer?
January, with a typical high of 36° and a low of 20°.
What is the hottest month in West Deer?
July, with a typical high of 84° and a low of 61°. About 14 days a year reach 90°.
How much snow does West Deer get?
About 29 inches in a normal winter, most of it in February.
When is the first frost in West Deer?
In half of years the first 32° night comes by November 2, and the last spring frost by April 16.
What is the rainiest month in West Deer?
June, with 4.6 inches of rain and melted snow. The year totals 42 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in West Deer.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for West Deer itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Salina 3 W, PA (19 mi, snow) and Natrona Lock 4, PA (8 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.