Baltimore, MD Climate & Monthly Averages
The climate of Baltimore
Seasons are the whole story in Baltimore. The gap between an average July and an average January is 24°C - hot, humid summers and generally mild winters - which in practice means 87°F (30°C) afternoons at one end of the calendar and 42°F (6°C) at the other.
Climate quick facts
- Hottest month: July - highs near 87°F (30°C)
- Coldest month: January - highs near 42°F (6°C)
- Decade extremes (2015-2024): 100°F (38°C) high · -2°F (-19°C) low
- Wettest month: July (15 rainy days) · Sunniest: July (11.7 h sun/day)
- Climate type: humid subtropical
- Annual swing: 24°C between the average warmest and coolest month · day to night: 9°C
- Snow: about 8 days a year
- Months averaging 30°C or hotter: 1
- Average humidity: 71%
Temperatures through the year
Warmth peaks in July: highs of 87°F (30°C), lows of 70°F (21°C). January bottoms out at 42°F (6°C) in daylight, 28°F (-2°C) after dark. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 100°F (38°C) and the lowest daily minimum -2°F (-19°C). Snow falls on roughly 8 days a year, mostly December through March.
Rain, sun and snow
Overnight lows average at or below freezing for 2 months, January through February. July is the brightest month at 11.7 hours of sun a day, against an annual average of 8.7. Three of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is September through October.
How Baltimore compares
- Baltimore sits close to the middle of our dataset on most measures: 57°F (14°C) as an annual average, 59.0 inches (1498 mm) of precipitation and 8.7 hours of sun a day.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 42° | 28° | 10 | 3.6 in | 6.0 h/day | 68% |
| February | 47° | 30° | 11 | 3.6 in | 7.0 h/day | 67% |
| March | 54° | 35° | 11 | 4.2 in | 8.0 h/day | 66% |
| April | 64° | 45° | 12 | 4.4 in | 9.2 h/day | 67% |
| May | 73° | 56° | 14 | 5.6 in | 9.7 h/day | 73% |
| June | 82° | 65° | 13 | 5.9 in | 11.3 h/day | 70% |
| July | 87° | 70° | 15 | 7.5 in | 11.7 h/day | 74% |
| August | 84° | 69° | 15 | 6.7 in | 10.8 h/day | 76% |
| September | 79° | 63° | 11 | 5.1 in | 8.9 h/day | 74% |
| October | 68° | 52° | 9 | 4.3 in | 8.0 h/day | 74% |
| November | 56° | 40° | 8 | 3.2 in | 7.5 h/day | 69% |
| December | 47° | 33° | 10 | 4.8 in | 6.0 h/day | 72% |
Baltimore month by month
Baltimore weather in January
January brings highs around 42°F (6°C), lows near 28°F (-2°C), about 10 wet days and roughly 3 snowy days - typically the coldest month of the year in Baltimore.
Baltimore weather in February
February brings highs around 47°F (8°C), lows near 30°F (-1°C), about 11 wet days and roughly 3 snowy days.
Baltimore weather in March
March brings highs around 54°F (12°C), lows near 35°F (2°C), about 11 wet days and roughly 2 snowy days.
Baltimore weather in April
April brings highs around 64°F (18°C), lows near 45°F (7°C), about 12 wet days.
Baltimore weather in May
May brings highs around 73°F (23°C), lows near 56°F (13°C), about 14 wet days.
Baltimore weather in June
June brings highs around 82°F (28°C), lows near 65°F (18°C), about 13 wet days.
Baltimore weather in July
July brings highs around 87°F (30°C), lows near 70°F (21°C), about 15 wet days - typically the hottest month and the wettest month and the sunniest month of the year in Baltimore.
Baltimore weather in August
August brings highs around 84°F (29°C), lows near 69°F (20°C), about 15 wet days.
Baltimore weather in September
September brings highs around 79°F (26°C), lows near 63°F (17°C), about 11 wet days.
Baltimore weather in October
October brings highs around 68°F (20°C), lows near 52°F (11°C), about 9 wet days.
Baltimore weather in November
November brings highs around 56°F (13°C), lows near 40°F (4°C), about 8 wet days - typically the driest month of the year in Baltimore.
Baltimore weather in December
December brings highs around 47°F (9°C), lows near 33°F (1°C), about 10 wet days.
Seasons in Baltimore
Spring (March through May)
Through spring, Baltimore is mild: 64°F (18°C) by day, 46°F (8°C) after dark, and rain falls on around 37 of the 90 days.
Summer (June through August)
Through summer, Baltimore runs hot: 84°F (29°C) by day, 68°F (20°C) after dark, and rain falls on around 43 of the 90 days. Daylight is generous - around 11.3 hours of sun a day. With the moisture factored in, afternoons feel hotter than the reading suggests - the humidity and dew point converter shows why.
Fall (September through November)
Fall stays on the cool side of mild here - highs near 67°F (20°C), nights near 52°F (11°C), and expect showers on roughly 28 days across the season.
Winter (December through February)
Winter in Baltimore is brisk and cold, with daytime highs averaging 45°F (7°C) and nights around 30°F (-1°C); expect showers on roughly 30 days across the season, plus about 6 snowy days.
Climate questions, answered
Is Baltimore cold in winter?
Does it freeze in Baltimore?
Is Baltimore a wet city?
What is the average temperature in Baltimore?
Is Baltimore hot in summer?
Best time to visit Baltimore
September to November and April is the sweet spot for Baltimore - warm days, manageable rainfall and plenty of daylight line up. Expect 67°F (19°C) in the afternoon and around 10 days of rain in a typical month of it. For the same question asked the other way round, see where else is warm in September.
Pack for Baltimore with light clothing for the warm months, a warm jacket and layers for the cooler season and a compact umbrella or rain shell. July nights average 70°F (21°C), so evenings rarely match the afternoons.
Baltimore temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.