Arnold has chilly winters and pleasant summers
A typical July afternoon reaches 84°, a January night drops to 22°, and about 21 inches of snow falls in a normal winter.
A year in Arnold at a glance
Each month’s typical high and low, and what it brings.
What stands out about Arnold’s climate
Read from where Arnold sits among Pennsylvania’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Arnold averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.1°).
A smaller shift than in 84% of U.S. towns.
Change by month
21 inches of snow, 43 of rain and melt
June is the wettest month and February the driest. Rain or snow falls on about 147 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
What a year in Arnold feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 177 frost-free days a year
In half of years the last 32° night comes by April 27 and the first by October 22.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Arnold’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
177 frost-free days. The last frost comes by Apr 27 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 22.
About 21" a winter over 8 days with an inch or more, most in February. Snow covers the ground about 24 days a year.
Months averaging under 55° run from October through April. Heating is 87% of the year’s heating-and-cooling load.
About 15 days a year reach 90°, and July afternoons average 84°.
The nicest months are May, June, July, August, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Arnold and its neighbors
Fairhope has the coldest January nights next door (22°) and Fairhope 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.
How Arnold compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
Arnold 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° | 3.2" | 5.7" | 15 | 9 | 22° – 40° |
| February | 42° | 23° | 2.8" | 7.2" | 12 | 7 | 20° – 41° |
| March | 51° | 30° | 3.5" | 4.6" | 13 | 3 | 34° – 51° |
| April | 64° | 39° | 3.6" | 0.1" | 14 | 0 | 46° – 56° |
| May | 73° | 49° | 4.3" | 0 | 14 | 0 | 54° – 67° |
| June | 80° | 58° | 4.4" | 0 | 13 | 0 | 65° – 71° |
| July | 84° | 62° | 4.2" | 0 | 11 | 0 | 69° – 76° |
| August | 83° | 61° | 3.8" | 0 | 10 | 0 | 67° – 76° |
| September | 77° | 54° | 3.5" | 0 | 10 | 0 | 62° – 70° |
| October | 65° | 42° | 3.1" | 0 | 12 | 0 | 50° – 60° |
| November | 53° | 33° | 3.0" | 0.5" | 12 | 1 | 37° – 48° |
| December | 43° | 27° | 3.2" | 3.3" | 13 | 5 | 25° – 45° |
| Year | 62° | 42° | 42.5" | 21.4" | 147 | 24 |
Heating and cooling a home in Arnold
87% 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. December swings the most: from 1991 to 2020 its average ranged from 25° to 45°. June is the most reliable, staying within 7°.
Common questions about Arnold’s climate
What is the coldest month in Arnold?
January, with a typical high of 38° and a low of 22°.
What is the hottest month in Arnold?
July, with a typical high of 84° and a low of 62°. About 15 days a year reach 90°.
How much snow does Arnold get?
About 21 inches in a normal winter, most of it in February.
When is the first frost in Arnold?
In half of years the first 32° night comes by October 22, and the last spring frost by April 27.
What is the rainiest month in Arnold?
June, with 4.4 inches of rain and melted snow. The year totals 43 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Arnold.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Arnold itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Donora 1 Sw, PA (4 mi) away. 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.