Charlotte Hall weather by month
What a typical year looks like in Charlotte Hall, Maryland: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Mechanicsville 5 NE, 6 km from Charlotte Hall; records cover 1974–2026.
The year at a glance
- Precipitation a year
- 48.1 in1222 mm
- Snow a year
- 15 in38 cm
- Last spring freeze
- Apr 12
- First fall freeze
- Nov 1
- Heating degree days
- 4,588
- Cooling degree days
- 1,029
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 10°−12° (heating, 99%) and 94°34° (cooling, 1%).
Month by month
Charlotte Hall in January
Highs average 44°7° and lows 25°−4°, with 3.3 in84 mm of precipitation and 5 in13 cm of snow in a typical January.
- Record high
- 81°27° (2002)
- Record low
- −7°−22° (1982)
- Heating degree days
- 945
- Cooling degree days
- 0
Charlotte Hall in February
Highs average 48°9° and lows 26°−3°, with 3 in75 mm of precipitation and 6 in16 cm of snow in a typical February.
- Record high
- 81°27° (1985)
- Record low
- −9°−23° (1996)
- Heating degree days
- 787
- Cooling degree days
- 0
Charlotte Hall in March
Highs average 56°13° and lows 33°0°, with 4.2 in108 mm of precipitation and 1.8 in4.6 cm of snow in a typical March.
- Record high
- 91°33° (1998)
- Record low
- 5°−15° (2009)
- Heating degree days
- 645
- Cooling degree days
- 2
Charlotte Hall in April
Highs average 67°20° and lows 43°6°, with 3.3 in84 mm of precipitation and 0.1 in0.3 cm of snow in a typical April.
- Record high
- 94°34° (1985)
- Record low
- 21°−6° (1982)
- Heating degree days
- 324
- Cooling degree days
- 21
Charlotte Hall in May
Highs average 74°23° and lows 52°11°, with 4.3 in110 mm of precipitation in a typical May.
- Record high
- 94°34° (1991)
- Record low
- 30°−1° (1986)
- Heating degree days
- 133
- Cooling degree days
- 66
Charlotte Hall in June
Highs average 82°28° and lows 61°16°, with 4.2 in106 mm of precipitation in a typical June.
- Record high
- 99°37° (2012)
- Record low
- 40°4° (1988)
- Heating degree days
- 17
- Cooling degree days
- 203
Charlotte Hall in July
Highs average 85°30° and lows 66°19°, with 4.6 in116 mm of precipitation in a typical July.
- Record high
- 103°39° (1980)
- Record low
- 45°7° (1979)
- Heating degree days
- 0
- Cooling degree days
- 329
Charlotte Hall in August
Highs average 83°29° and lows 64°18°, with 4.8 in123 mm of precipitation in a typical August.
- Record high
- 101°38° (1983)
- Record low
- 41°5° (1986)
- Heating degree days
- 2
- Cooling degree days
- 273
Charlotte Hall in September
Highs average 77°25° and lows 58°14°, with 4.9 in124 mm of precipitation in a typical September.
- Record high
- 100°38° (1980)
- Record low
- 35°2° (1981)
- Heating degree days
- 53
- Cooling degree days
- 119
Charlotte Hall in OctoberThis month
Highs average 66°19° and lows 46°8°, with 4.2 in106 mm of precipitation in a typical October.
- Record high
- 90°32° (2019)
- Record low
- 20°−7° (2003)
- Heating degree days
- 297
- Cooling degree days
- 15
Charlotte Hall in November
Highs average 57°14° and lows 36°2°, with 3.3 in85 mm of precipitation in a typical November.
- Record high
- 82°28° (1974)
- Record low
- 14°−10° (1976)
- Heating degree days
- 559
- Cooling degree days
- 1
Charlotte Hall in December
Highs average 48°9° and lows 29°−2°, with 4 in101 mm of precipitation and 2 in5.1 cm of snow in a typical December.
- Record high
- 80°27° (1998)
- Record low
- 0°−18° (1989)
- Heating degree days
- 826
- Cooling degree days
- 0