Neither notably warm, cold, wet nor dry, Mifflintown sits near the middle of U.S. towns
January mornings start at about 22°. Compared with 1901–2000, the average now sits 1.1° higher. Comfortable outdoor weather lasts from May to June and August to October, with highs of 65–84°.
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
Compared with towns across the U.S., with Mifflintown’s place in Pennsylvania beside it.
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. Frost and day counts come from NOAA’s station at Lewistown, PA, 9 miles from the town’s center, 120 ft lower.
The 2023 USDA map puts Mifflintown’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 1°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 26 inches of snow a winter
Snow, measured at Lewistown, PA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 43 inches a year; 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
Heating and cooling a home in Mifflintown
87% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Lewistown, PA.
Living with Mifflintown’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
185 frost-free days in zone 7a. 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.
Months with highs of 62–84° and lows of 40° or more: May, June, August, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Mifflintown from natural hazards, river flooding is the largest share (79%); heat waves, cold waves, winter storms and ice storms together are 3%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Mifflintown and similar climates
TownRatings has no climate map of the towns around Mifflintown yet.
Climates most like Mifflintown’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Mifflintown, PA | 22° | 86° | 43" | 26" |
| Gahanna, OH | 21° | 85° | 42" | 28" |
| Highland Heights, KY | 23° | 86° | 45" | 23" |
| Lawrenceburg, IN | 23° | 86° | 45" | 23" |
| New Martinsville, WV | 22° | 85° | 46" | 27" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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 72% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Mifflintown compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Mifflintown’s place among Pennsylvania’s.
Mifflintown weather by month
Highs, lows and precipitation from NOAA’s grid at Mifflintown’s center; snow, wet days and snow on the ground from Lewistown, PA. 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" | 0.0" | 14 | 0 | 56° – 67° |
| June | 81° | 59° | 4.1" | 0.0" | 12 | 0 | 67° – 73° |
| July | 86° | 63° | 3.7" | 0.0" | 11 | 0 | 70° – 78° |
| August | 84° | 62° | 3.8" | 0.0" | 11 | 0 | 69° – 77° |
| September | 77° | 54° | 4.4" | 0.0" | 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 |
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°.
Where Mifflintown’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Mifflintown’s center.
- Snow: Lewistown, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Lewistown, PA, 9 miles from the town’s center, 120 ft lower; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Mifflintown’s climate
What is the weather like in Mifflintown?
A typical July afternoon reaches 86°, a January night drops to 22°, and about 26 inches of snow falls in a normal winter. Milder January nights than 52% of U.S. towns; hotter July afternoons than 54% of U.S. towns.
How cold does it get in Mifflintown in winter?
January nights average 22°. About 122 nights a year reach 32° or below and 1 reach 0° or below. In the coldest January of the last 30 years the month averaged 21°.
How much snow does Mifflintown get?
About 26 inches in a normal winter at Lewistown, PA, most of it in January, with snow on the ground about 30 days a year.
How hot does it get in Mifflintown?
July, with a typical high of 86° and a low of 63°. About 18 days a year reach 90° (Lewistown, PA).
When is the first and last frost in Mifflintown?
In half of years the last spring frost (32°) comes by April 21 and the first fall frost by October 24, about 185 frost-free days, at Lewistown, PA.
What growing zone is Mifflintown in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 1°.
What is the best time of year to visit Mifflintown?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, August, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Mifflintown getting warmer?
Yes: 1991–2020 averaged 1.1° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 72% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Mifflintown.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.