Baltimore, MD Climate & Monthly Averages
Baltimore has a humid subtropical climate. July is the hottest month, averaging 87° by day; January is the coldest at 42°.
Baltimore's climate is a story of contrasts
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.
July
87° by day 70° at nightJanuary
42° by day 28° at nightThe two ends of 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.
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.
More climate facts for Baltimore
- 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%
Four distinct parts of the year 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.
Baltimore temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.
Choosing a season in Baltimore
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.
What to pack
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.
Monthly highs, lows and seasonal change
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 42° | 28° | 10 | 3.6 in | 6.0 h/day | 9.7 h | 31% | 68% |
| February | 47° | 30° | 11 | 3.6 in | 7.0 h/day | 10.7 h | 38% | 67% |
| March | 54° | 35° | 11 | 4.2 in | 8.0 h/day | 11.8 h | 35% | 66% |
| April | 64° | 45° | 12 | 4.4 in | 9.2 h/day | 13.2 h | 40% | 67% |
| May | 73° | 56° | 14 | 5.6 in | 9.7 h/day | 14.3 h | 45% | 73% |
| June | 82° | 65° | 13 | 5.9 in | 11.3 h/day | 14.9 h | 45% | 70% |
| July | 87° | 70° | 15 | 7.5 in | 11.7 h/day | 14.7 h | 48% | 74% |
| August | 84° | 69° | 15 | 6.7 in | 10.8 h/day | 13.7 h | 47% | 76% |
| September | 79° | 63° | 11 | 5.1 in | 8.9 h/day | 12.4 h | 36% | 74% |
| October | 68° | 52° | 9 | 4.3 in | 8.0 h/day | 11.1 h | 30% | 74% |
| November | 56° | 40° | 8 | 3.2 in | 7.5 h/day | 10.0 h | 25% | 69% |
| December | 47° | 33° | 10 | 4.8 in | 6.0 h/day | 9.4 h | 31% | 72% |
Baltimore from the coldest month to the hottest
Each card shows the average high and low. The bar places that month between Baltimore's coldest night and warmest afternoon.
January
- Rain
- 10 days
- Sunshine
- 6.0 h
- Daylight
- 9.7 h
- Snow
- 3 days
February
- Rain
- 11 days
- Sunshine
- 7.0 h
- Daylight
- 10.7 h
- Snow
- 3 days
March
- Rain
- 11 days
- Sunshine
- 8.0 h
- Daylight
- 11.8 h
- Snow
- 2 days
April
- Rain
- 12 days
- Sunshine
- 9.2 h
- Daylight
- 13.2 h
May
- Rain
- 14 days
- Sunshine
- 9.7 h
- Daylight
- 14.3 h
June
- Rain
- 13 days
- Sunshine
- 11.3 h
- Daylight
- 14.9 h
July
- Rain
- 15 days
- Sunshine
- 11.7 h
- Daylight
- 14.7 h
August
- Rain
- 15 days
- Sunshine
- 10.8 h
- Daylight
- 13.7 h
September
- Rain
- 11 days
- Sunshine
- 8.9 h
- Daylight
- 12.4 h
October
- Rain
- 9 days
- Sunshine
- 8.0 h
- Daylight
- 11.1 h
November
- Rain
- 8 days
- Sunshine
- 7.5 h
- Daylight
- 10.0 h
December
- Rain
- 10 days
- Sunshine
- 6.0 h
- Daylight
- 9.4 h
Looking for warmer alternatives? Browse warm places by month, or compare Baltimore's coolest part of the year: January, February, December.
Where Baltimore sits among other climates
- 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.
These comparisons use the same ten-year window for every city in the dataset.