Photo: Famartin · CC BY-SA 4.0A middle-of-the-road climate: Kemps Mill is close to most U.S. towns on every count
Midwinter brings lows of about 23°. The seasons are far apart: from a winter night to a summer afternoon the average spans 65°. In July, afternoons here are warmer than in 66% of U.S. towns. Seedlings are safe outdoors from about April 11, with the first autumn frost due around October 28.
A year in Kemps Mill at a glance
Each month’s typical high and low, and what it brings.
What stands out about Kemps Mill’s climate
Compared with towns across the U.S., with Kemps Mill’s place in Maryland beside it.
What a year in Kemps Mill feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 199 frost-free days a year
In half of years the last 32° night comes by April 11 and the first by October 28. Frost and day counts come from NOAA’s station at Hagerstown 1 E, MD, 6 miles from the town’s center, 140 ft higher.
The 2023 USDA map puts Kemps Mill’s center in zone 7a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 2°. 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 31 inches of snow a winter
Snow, measured at Chambersburg 1 Ese, PA, falls mostly in January. Precipitation (rain plus melted snow) adds up to 40 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 117 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Kemps Mill
82% of the work is heating. Months averaging under 55° run from November 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 Hagerstown 1 E, MD.
Living with Kemps Mill’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
199 frost-free days in zone 7a. The last frost comes by Apr 11 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 28.
Months with highs of 62–84° and lows of 40° or more: April, May, June, September and October.
Parks & trails →Of the yearly building losses FEMA expects in Kemps Mill from natural hazards, river flooding is the largest share (55%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Kemps Mill and similar climates
TownRatings has no climate map of the towns around Kemps Mill yet.
Climates most like Kemps Mill’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 |
|---|---|---|---|---|
| Kemps Mill, MD | 23° | 88° | 40" | 31" |
| Obetz, OH | 22° | 86° | 41" | 28" |
| Parkville, MO | 20° | 88° | 39" | 18" |
| Fort Wright, KY | 24° | 87° | 45" | 23" |
| Chatham, IL | 20° | 86° | 39" | 22" |
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 Kemps Mill averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.9°).
A bigger shift than in 67% 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 Kemps Mill compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Kemps Mill’s place among Maryland’s.
Kemps Mill weather by month
Highs, lows and precipitation from NOAA’s grid at Kemps Mill’s center; snow, wet days and snow on the ground from Chambersburg 1 Ese, PA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 41° | 23° | 2.7" | 10.0" | 10 | 11 | 23° – 40° |
| February | 44° | 24° | 2.2" | 8.0" | 9 | 11 | 24° – 43° |
| March | 53° | 31° | 3.4" | 6.0" | 10 | 5 | 37° – 52° |
| April | 66° | 41° | 3.5" | 0.3" | 11 | 0 | 49° – 59° |
| May | 75° | 51° | 4.0" | 0.0" | 12 | 0 | 58° – 69° |
| June | 83° | 59° | 3.7" | 0.0" | 11 | 0 | 67° – 74° |
| July | 88° | 64° | 3.7" | 0.0" | 10 | 0 | 71° – 79° |
| August | 86° | 62° | 3.3" | 0.0" | 9 | 0 | 69° – 77° |
| September | 79° | 55° | 4.0" | 0.0" | 9 | 0 | 64° – 71° |
| October | 67° | 43° | 3.1" | 0.0" | 9 | 0 | 52° – 62° |
| November | 55° | 34° | 2.9" | 1.0" | 8 | 0 | 38° – 50° |
| December | 44° | 27° | 3.3" | 5.5" | 9 | 5 | 26° – 45° |
| Year | 65° | 43° | 39.6" | 30.8" | 117 | 31 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 26° to 45°. September is the most reliable, staying within 7°.
Where Kemps Mill’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 Kemps Mill’s center.
- Snow: Chambersburg 1 Ese, PA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Hagerstown 1 E, MD, 6 miles from the town’s center, 140 ft higher; 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 Kemps Mill’s climate
What is the weather like in Kemps Mill?
A typical July afternoon reaches 88°, a January night drops to 23°, and about 31 inches of snow falls in a normal winter. Milder January nights than 55% of U.S. towns; hotter July afternoons than 66% of U.S. towns.
How cold does it get in Kemps Mill in winter?
January nights average 23°. About 103 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 23°.
How much snow does Kemps Mill get?
About 31 inches in a normal winter at Chambersburg 1 Ese, PA, most of it in January, with snow on the ground about 31 days a year.
How hot does it get in Kemps Mill?
July, with a typical high of 88° and a low of 64°. About 32 days a year reach 90° (Hagerstown 1 E, MD).
When is the first and last frost in Kemps Mill?
In half of years the last spring frost (32°) comes by April 11 and the first fall frost by October 28, about 199 frost-free days, at Hagerstown 1 E, MD.
What growing zone is Kemps Mill in?
Zone 7a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 2°.
What is the best time of year to visit Kemps Mill?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May, June, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Kemps Mill getting warmer?
Yes: 1991–2020 averaged 1.6° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 67% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Kemps Mill.
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.