Charlotte Hall has chilly winters and warm summers
A typical July afternoon reaches 88°, a January night drops to 27°, and about 15 inches of snow falls in a normal winter.
A year in Charlotte Hall at a glance
Each month’s typical high and low, and what it brings.
What stands out about Charlotte Hall’s climate
Read from where Charlotte Hall sits among Maryland’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Charlotte Hall averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.5°).
A bigger shift than in 69% of U.S. towns.
Change by month
What a year in Charlotte Hall feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
15 inches of snow, 46 of rain and melt
September is the wettest month and February the driest. Rain or snow falls on about 115 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 195 frost-free days a year
In half of years the last 32° night comes by April 17 and the first by October 27.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Charlotte Hall’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
195 frost-free days. The last frost comes by Apr 17 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 27.
About 15" a winter over 4 days with an inch or more, most in February. Snow covers the ground about 12 days a year.
Months averaging under 55° run from November through March. Heating is 82% of the year’s heating-and-cooling load.
About 16 days a year reach 90°, and July afternoons average 88°.
The nicest months are April, May, June, September and October.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Charlotte Hall compares
Against every U.S. town on TownTapestry, each counted once, with its place in Maryland.
Charlotte Hall 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 | 45° | 27° | 3.2" | 5.0" | 10 | 4 | 28° – 42° |
| February | 48° | 28° | 2.7" | 6.2" | 9 | 5 | 28° – 45° |
| March | 56° | 35° | 4.0" | 1.8" | 10 | 1 | 40° – 54° |
| April | 68° | 44° | 3.3" | 0.1" | 10 | 0 | 52° – 61° |
| May | 75° | 54° | 4.1" | 0 | 11 | 0 | 60° – 71° |
| June | 84° | 63° | 4.2" | 0 | 10 | 0 | 69° – 78° |
| July | 88° | 68° | 4.4" | 0 | 10 | 0 | 73° – 82° |
| August | 86° | 66° | 4.5" | 0 | 9 | 0 | 71° – 79° |
| September | 79° | 60° | 4.7" | 0 | 9 | 0 | 66° – 75° |
| October | 69° | 48° | 3.9" | 0 | 8 | 0 | 54° – 65° |
| November | 58° | 37° | 3.2" | 0 | 8 | 0 | 42° – 52° |
| December | 49° | 31° | 3.7" | 2.0" | 9 | 2 | 31° – 51° |
| Year | 67° | 47° | 45.8" | 15.1" | 115 | 12 |
Heating and cooling a home in Charlotte Hall
82% 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 31° to 51°. August is the most reliable, staying within 8°.
Common questions about Charlotte Hall’s climate
What is the coldest month in Charlotte Hall?
January, with a typical high of 45° and a low of 27°.
What is the hottest month in Charlotte Hall?
July, with a typical high of 88° and a low of 68°. About 16 days a year reach 90°.
How much snow does Charlotte Hall get?
About 15 inches in a normal winter, most of it in February.
When is the first frost in Charlotte Hall?
In half of years the first 32° night comes by October 27, and the last spring frost by April 17.
What is the rainiest month in Charlotte Hall?
September, with 4.7 inches of rain and melted snow. The year totals 46 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Charlotte Hall.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Charlotte Hall itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Mechanicsville 5 Ne, MD (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.