Mifflintown has chilly winters and warm summers
A typical July afternoon reaches 86°, a January night drops to 22°, and about 26 inches of snow falls in a normal winter.
A year in Mifflintown at a glance
Each month’s typical high and low, and what it brings.
What stands out about Mifflintown’s climate
Read from where Mifflintown sits among Pennsylvania’s towns. The page puts what stands out first.
What a year in Mifflintown feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 185 frost-free days a year
In half of years the last 32° night comes by April 21 and the first by October 24.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
26 inches of snow, 43 of rain and melt
September is the wettest month and February the driest. Rain or snow falls on about 135 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Living with Mifflintown’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
185 frost-free days. The last frost comes by Apr 21 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 24.
About 26" a winter over 9 days with an inch or more, most in January. Snow covers the ground about 30 days a year.
Months averaging under 55° run from October through April. Heating is 87% of the year’s heating-and-cooling load.
About 18 days a year reach 90°, and July afternoons average 86°.
The nicest months are May, June, 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 →Warmer than it used to be
The last 30 years in Mifflintown averaged 1.1° warmer than the 1900s. The biggest change is in December (+2.4°).
A smaller shift than in 63% of U.S. towns.
Change by month
How Mifflintown compares
Against every U.S. town on TownTapestry, each counted once, with its place in Pennsylvania.
Mifflintown 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 | 37° | 22° | 3.0" | 9.1" | 11 | 10 | 21° – 37° |
| February | 41° | 23° | 2.5" | 6.9" | 10 | 10 | 20° – 39° |
| March | 50° | 30° | 3.5" | 4.3" | 11 | 4 | 34° – 50° |
| April | 63° | 40° | 3.6" | 0.2" | 13 | 0 | 47° – 56° |
| May | 73° | 50° | 4.0" | 0 | 14 | 0 | 56° – 67° |
| June | 81° | 59° | 4.1" | 0 | 12 | 0 | 67° – 73° |
| July | 86° | 63° | 3.7" | 0 | 11 | 0 | 70° – 78° |
| August | 84° | 62° | 3.8" | 0 | 11 | 0 | 69° – 77° |
| September | 77° | 54° | 4.4" | 0 | 10 | 0 | 63° – 70° |
| October | 65° | 43° | 3.7" | 0.1" | 11 | 0 | 50° – 60° |
| November | 52° | 34° | 3.1" | 0.9" | 10 | 1 | 38° – 48° |
| December | 42° | 27° | 3.4" | 4.7" | 11 | 5 | 25° – 42° |
| Year | 63° | 42° | 42.7" | 26.2" | 135 | 30 |
Heating and cooling a home in Mifflintown
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. February swings the most: from 1991 to 2020 its average ranged from 20° to 39°. June is the most reliable, staying within 6°.
Common questions about Mifflintown’s climate
What is the coldest month in Mifflintown?
January, with a typical high of 37° and a low of 22°.
What is the hottest month in Mifflintown?
July, with a typical high of 86° and a low of 63°. About 18 days a year reach 90°.
How much snow does Mifflintown get?
About 26 inches in a normal winter, most of it in January.
When is the first frost in Mifflintown?
In half of years the first 32° night comes by October 24, and the last spring frost by April 21.
What is the rainiest month in Mifflintown?
September, 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 Mifflintown.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Mifflintown itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lewistown, PA (9 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.