Baltimore climate
Baltimore (Maryland, United States) has a hot-summer humid continental climate (Köppen Dfa). The average temperature over the year is 13 °C55 °F, and about 1,163 mm46 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Baltimore climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 439 | −424 | 032 | 702.8 | 26 |
| Feb | 542 | −425 | 134 | 712.8 | 24 |
| Mar | 1151 | 033 | 642 | 853.3 | 18 |
| Apr | 1864 | 643 | 1254 | 943.7 | 4 |
| May | 2374 | 1254 | 1864 | 1064.2 | 0 |
| Jun | 2882 | 1864 | 2373 | 1174.6 | 0 |
| Jul | 3188 | 2169 | 2679 | 1144.5 | 0 |
| Aug | 3087 | 2068 | 2577 | 1064.2 | 0 |
| Sep | 2780 | 1660 | 2170 | 1134.5 | 0 |
| Oct | 1967 | 948 | 1457 | 1084.3 | 1 |
| Nov | 1355 | 337 | 846 | 813.2 | 10 |
| Dec | 643 | −229 | 236 | 963.8 | 22 |
| Year | 3188 | −424 | 1355 | 1,16346 | 106 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 84% | 63% | 2.0 | 9:41 |
| Feb | 82% | 62% | 2.9 | 10:40 |
| Mar | 80% | 61% | 3.8 | 11:50 |
| Apr | 77% | 59% | 5.0 | 13:11 |
| May | 79% | 62% | 5.5 | 14:19 |
| Jun | 76% | 56% | 6.2 | 14:55 |
| Jul | 70% | 53% | 6.2 | 14:40 |
| Aug | 70% | 53% | 5.4 | 13:42 |
| Sep | 72% | 51% | 4.4 | 12:23 |
| Oct | 77% | 54% | 3.2 | 11:05 |
| Nov | 80% | 55% | 2.3 | 9:58 |
| Dec | 85% | 63% | 1.7 | 9:25 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Baltimore is like
The warmest month is July, with an average high of 31 °C88 °F and a low of 21 °C69 °F. The coldest is January, when highs average 4 °C39 °F and lows −4 °C24 °F. Seasons are strongly marked: the warmest month is on average 26.1 °C47 °F warmer than the coldest.
It is wet, with about 1,163 mm46 in of precipitation per year. Rain is spread fairly evenly through the year. The wettest month is June (117 mm4.6 in), the driest is January (70 mm2.8 in).
Relative humidity ranges from 70% in July to 85% in December. The clearest skies (lowest average cloud amount, 51%) are typical of September. Average wind speed near the ground ranges from 7 km/h (4 mph) in August to 12 km/h (7 mph) in March. Daylight lasts from about 9.4 hours in December to 14.9 hours in June.
A lasting snow cover is typical in January and February, when the average snow depth in the reanalysis exceeds 10 cm (deepest in February, about 13 cm).
Best time to visit Baltimore
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May and June and September and October: average highs of 19 °C67 °F to 28 °C82 °F with 106 mm4.2 in to 117 mm4.6 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 4 °C39 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Baltimore
- Winter (December–February) — highs 439 to 6 °C43 °F, lows −424 to −2 °C29 °F, about 79 mm3.1 in of precipitation a month. Pack a warm coat, layers and closed shoes and shoes with good grip, as frost is common.
- Spring (March–May) — highs 1151 to 23 °C74 °F, lows 033 to 12 °C54 °F, about 95 mm3.7 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 2882 to 31 °C88 °F, lows 1864 to 21 °C69 °F, about 113 mm4.4 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1355 to 27 °C80 °F, lows 337 to 16 °C60 °F, about 101 mm4.0 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
How Baltimore compares
Compared with Washington, about 57 km to the southwest, Baltimore is on average 0.6 °C1 °F cooler and receives a similar amount of precipitation. The difference is largest in February (0.8 °C1.5 °F cooler).
Of the 222 places in the United States covered by World Climates, Baltimore is the 135th warmest by annual mean temperature and the 78th wettest by annual precipitation. See all of them on the United States climate page.
Places in other countries with the most similar temperature and rainfall pattern: Nagano (Japan, Dfa), Maykop (Russia, Cfa) and Fukushima (Japan, Dfa).
Nearby places
- Washington 57 km · 14 °C56 °F · 1,153 mm45 in
- Philadelphia 144 km · 12 °C54 °F · 1,226 mm48 in
- Allentown 175 km · 11 °C52 °F · 1,233 mm49 in
- Atlantic City 188 km · 13 °C55 °F · 1,203 mm47 in
- Richmond 207 km · 14 °C58 °F · 1,182 mm47 in
- Wilkes-Barre 226 km · 11 °C51 °F · 1,214 mm48 in
- East Hampton 252 km · 16 °C60 °F · 1,207 mm48 in
- Staten Island 254 km · 12 °C53 °F · 1,226 mm48 in
Frequently asked questions
What is the warmest month in Baltimore?
July is the warmest month in Baltimore, with an average high of 31 °C (88 °F) and an average low of 21 °C (69 °F).
What is the coldest month in Baltimore?
January is the coldest month, with an average high of 4 °C (39 °F) and an average low of -4 °C (24 °F).
When does it rain the most in Baltimore?
June is the wettest month with about 117 mm (4.6 in) of precipitation; January is the driest with about 70 mm (2.8 in).
What is the best time to visit Baltimore?
Judging by long-term averages, the most comfortable months are May and June and September and October.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 149 m, while Baltimore lies at about 10 m. Temperatures on this page were therefore adjusted by +0.9 °C1.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.