Climate and monthly weather forecastBaltimore, MD
Climate and monthly weather forecast
The climate of Baltimore
Baltimore, Maryland is situated in the humid subtropical climate zone according to the Köppen climate classification, marked as Cfa. It indicates no dry season and hot summers. Throughout the year, the city experiences moderate climatic variations, with notable weather transitions occurring each season.The annual average temperatures in Baltimore range from a low of 27.1°F (-2.7°C) in January to a high of 85.3°F (29.6°C) in July. Humidity levels stay fairly consistent throughout the year, usually staying between 72% to 75%. Rainfall is a common occurrence all year round in this city, with the highest precipitation, 4.13" (105mm), observed in August. The city even receives a small amount of snow (about 2.09" (53mm) in January) and is known for its occasionally harsh winters.
Daylight hours in Baltimore extend between a minimum of 9.8 hours in December to a maximum of 14.9 hours in June. In line with the daylight timings, the sunshine hours vary from 5.2 hours in December up to 10.9 hours in July. Despite the fluctuating daylight hours, the UV index remains constant/year-round, swinging between 2 and 6. In regards to wind conditions, speeds can surge up to 9.1mph (14.6km/h) in March and fall to a milder 5.7mph (9.2km/h) from July to September.
The best time to visit Baltimore
Tourists often find the best time to visit Baltimore to be the months of May and June when weather conditions are most favorable. During this time, temperatures average between 63°F (17.2°C) to 80.1°F (26.7°C), offering a comfortable atmosphere for outdoor activities. The moderately high humidity, ranging from 72% to 77%, adds to the pleasant early summer climate. While there is rainfall during these months, it is not excessive as to disrupt plans, with an average of 2.32" (59mm) in April and 2.76" (70mm) in June.The worst time to visit Baltimore
Traveling to Baltimore between January and March is often considered less ideal due to harsh winter conditions. During this period, the city experiences its lowest temperatures, sometimes dropping to as low as 27.1°F (-2.7°C) in January. In addition, these months record the most snowfall with January registering about 2.09" (53mm).Spring weather in Baltimore
Spring in Baltimore extends from March to May, with temperatures rising steadily from an average low of 36.3°F (2.4°C) in March to a peak of 55.9°F (13.3°C) by May. Rainfall during this season is significant, with the highest recorded levels of 3.07" (78mm) in May. Additionally, the length of daylight hours also increases in spring, from 12 hours in March to 14.3 hours by May’s end.Summer weather in Baltimore
June through August marks summer in Baltimore, with July often being the hottest month, boasting an average high temperature of 85.3°F (29.6°C). Summers in Baltimore are characterized by higher humidity, peaking at 77%. Rainfall is extensive during this season, escalating to a yearly high of 4.13" (105mm) in August.Autumn weather in Baltimore
Autumn in Baltimore falls between September and November, with temperatures during this season ranging from a high of 77°F (25°C) in September to a low of 40.3°F (4.6°C) in November. Rainfall drops significantly during this period, from 2.24" (57mm) in September to approximately 2.09" (53mm) in November.Winter weather in Baltimore
The winter months in Baltimore - December, January, and February - are usually cold with occasional snowfall. Temperatures during this season fluctuate from a low of 27.1°F (-2.7°C) in January to a higher, but still chilly, 42.4°F (5.8°C) in February. Baltimore's winters also have lower rainfall, with an average of around 1.97" (50mm) in February.Weather in January
January in Baltimore, Maryland, brings chilly temperatures and the beginning of the year. The coldest month on average, this month generally starts with temperatures ranging from 38.5°F (3.6°C) down to 27.1°F (-2.7°C). A snowfall of 2.09" (53mm) makes this winter period a typical scene with a fresh coat of white powdery substance. Weather in January »Weather in February
The weather in February still holds onto the chills of Winter in Baltimore, but signs of spring are often in view towards the month's end. Compared to January, the temperature range in February shows a slight increase. With an average high temperature of 42.4°F (5.8°C) and a low of 29.7°F (-1.3°C), February offers a noticeable shift towards warmer conditions. Weather in February »Weather in March
As the city of Baltimore steps into the early phase of Spring, March displays a significant difference in temperatures. The smooth transition from winter to spring means the weather varies from day to day, sometimes showcasing the last of winter's chill, other times hinting at spring's warmth. Weather in March »Weather in April
April in Baltimore begins to experience the full effects of the Spring season. This month brings warmer temperatures, blooming flowers, and a refreshing sense of change. Steeper daytime temperatures become the norm, reaching a high of 63°F (17.2°C) and a low of 46°F (7.8°C). Weather in April »Weather in May
May in Baltimore is well within Spring and showcases the best it has to offer with beautiful seasonal flora and warmer temperatures. May brings the first taste of Summer, leading to an increase in outdoor activities—parks, trails, and outdoor adventures are bustling with life. Weather in May »Weather in June
The month of June in Baltimore officially welcomes Summer with extended daylight hours and increasing temperatures. Locals and visitors alike take full advantage of the increased sunshine and longer days during this month. With a leap to more summer-friendly temperatures, June holds an average high of 80.1°F (26.7°C). Weather in June »Weather in July
July in Baltimore presents itself as the heart of Summer, offering the pinnacle of heat for the whole year. This month, Baltimore basks in the peak of Summer's high temperature of 85.3°F (29.6°C). Days are long, and sun exposures are high making it the perfect time for beach getaways, water activities, and festivals. Weather in July »Weather in August
August in Baltimore is the month of high Summer where temperatures remain consistently warm, although slightly lower than July. The heat lingers in the air even as the gradual transition into autumn begins. Despite having a high temperature of 83.5°F (28.6°C), August sees a slight uptick in rainfall with 4.13" (105mm) on average. Weather in August »Weather in September
September brings about a significant seasonal shift in Baltimore as it transitions from the Summer's heat to the cooler temperatures of Autumn. The humidity is less oppressive, and a touch of Fall is palpable in the cool mornings and evenings. Weather in September »Weather in October
October in Baltimore presents the Autumn season in its full glory. This month is characterized by cool temperatures, colorful foliage, and a crispness in the air. By this time, the summer heat has entirely faded with average temperatures dropping to a high of 65.3°F (18.5°C). Weather in October »Weather in November
November leads Baltimore further into the Fall season, bringing cooler weather and decreasing daylight hours. Outdoor activities are still quite enjoyable, albeit with the addition of warmer clothing. Temperatures decrease considerably and start to register a high of 53.2°F (11.8°C). Weather in November »Weather in December
December in Baltimore represents the arrival of Winter and the end of the year. The city gets decked up with holiday decorations and can experience some snowfall towards the late December period. The temperatures are colder with an average high of 44.8°F (7.1°C), pointing towards the upcoming depth of Winter. Weather in December »Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Baltimore's January weather reaches an average high of 38.5°F (3.6°C) and an average low of 27.1°F (-2.7°C), making it the coldest month.
The month with the least rainfall is January, when the rain falls for 8.7 days and typically collects 1.85" (47mm) of precipitation.
Throughout the year, there are 158.5 rainfall days, and 30.75" (781mm) of precipitation is accumulated.
Months with snowfall are January through March, November and December.
The month with the most snowfall is January, when snow falls for 4.2 days and typically aggregates up to 2.09" (53mm) of snow.
Throughout the year, there are 12.8 snowfall days, and 6.06" (154mm) of snow is accumulated.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Baltimore.
February is the month with the coldest seawater in Baltimore, with an average ocean temperature of 44.4°F (6.9°C).
The month with the least sunshine is February, with an average of 5h of sunshine.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
April, July and November, with an average relative humidity of 72%, are the least humid months in Baltimore, Maryland.
April through October are months without snowfall.
May is the most humid month, with an average relative humidity of 77%.
May through August, with an average maximum UV index of 6, are months with the highest UV index.
The month with the longest days is June, with an average of 14h and 54min of daylight.
The warmest period tends to be July, when average temperatures fluctuate between a high of 85.3°F (29.6°C) and a low of 69.6°F (20.9°C).
With an average of 10.9h of sunshine, July has the most sunshine of the year.
August is the month with the most rainfall in Baltimore. Rain falls for 16.8 days and accumulates 4.13" (105mm) of precipitation.
The month with the warmest seawater is August, with an average ocean temperature of 77.5°F (25.3°C).
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Baltimore, MD
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (38.5°F).
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (27.1°F).
Average pressure
Baltimore, MD
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.07"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.99"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Baltimore, MD
- Average wind speed in January:
9mph - Average wind speed in February:
9mph - Average wind speed in March:
9.1mph - Average wind speed in April:
8.8mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.5mph - Average wind speed in October:
7.8mph - Average wind speed in November:
8.1mph - Average wind speed in December:
8.4mph
The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity
Baltimore, MD
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are April, July and November (72%).
Average rainfall
Baltimore, MD
- Average rainfall in January:
1.85" - Average rainfall in February:
1.97" - Average rainfall in March:
2.24" - Average rainfall in April:
2.32" - Average rainfall in May:
3.07" - Average rainfall in June:
2.76"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days
Baltimore, MD
- Average rainfall days in January:
8.7 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
14.6 days - Average rainfall days in May:
18.1 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
13.2 days - Average rainfall days in October:
12.4 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.4 days).
Average snowfall
Baltimore, MD
The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Baltimore, MD
- Average snowfall days in January:
4.2 days - Average snowfall days in February:
3.7 days - Average snowfall days in March:
2.3 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.3 days - Average snowfall days in December:
2.2 days
The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature
Baltimore, MD
The best month for swimming (with the highest average sea temperature) is August (77.5°F).
The coldest month (with the lowest average sea temperature) is February (44.5°F).
Average daylight / Average sunshine
Baltimore, MD
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 18min - Average sunshine in February:
5h and 0min - Average sunshine in March:
6h and 48min - Average sunshine in April:
8h and 48min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 24min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 24min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days
Baltimore, MD
- Average sunshine days in January:
18.3 days - Average sunshine days in February:
15.5 days - Average sunshine days in March:
15.1 days - Average sunshine days in April:
13.8 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
11.7 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
12.1 days - Average sunshine days in September:
14.6 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
19.9 days - Average sunshine days in December:
18.2 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is May (10.3 days).
Average UV index
Baltimore, MD
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover
Baltimore, MD
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility
Baltimore, MD
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
