Climateby Month

Baltimore, MD climate by month

NOAA 1991-2020 normals · 36 ft elevation · also covers Columbia

Summers in Baltimore are hot and humid; winters are chilly. Highs peak at 89°F in July and fall to 43°F in January. Wet days are spread through the year, from about 9 to 12 a month. Normal snowfall is about 19 in a year. The most comfortable time to visit is April and May.

Warmest month
89°F
July normal high
Coldest month
25°F
January normal low
Wet days a year
121
45.0 in of precipitation
Snow a year
19.3 in
normal snowfall

How warm is Baltimore?

Normal highs range from 43°F in January to 89°F in July.

20°40°60°80°100° January: normal high 43°F (6°C), low 25°F (-4°C) 43° 25° February: normal high 46°F (8°C), low 27°F (-3°C) March: normal high 55°F (13°C), low 34°F (1°C) April: normal high 67°F (19°C), low 44°F (7°C) May: normal high 76°F (24°C), low 53°F (12°C) June: normal high 84°F (29°C), low 63°F (17°C) July: normal high 89°F (32°C), low 68°F (20°C) 89° 68° August: normal high 87°F (31°C), low 66°F (19°C) September: normal high 80°F (27°C), low 59°F (15°C) October: normal high 68°F (20°C), low 47°F (8°C) November: normal high 57°F (14°C), low 37°F (3°C) December: normal high 48°F (9°C), low 30°F (-1°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Baltimore?

May has the most wet days (about 12); the year brings about 45 in of precipitation.

January: 10 wet days February: 9 wet days March: 11 wet days April: 11 wet days May: 12 wet days 12 June: 11 wet days July: 10 wet days August: 10 wet days September: 9 wet days October: 9 wet days November: 9 wet days 9 December: 10 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 19.3 in a year, most of it in February.

January: 6.4 in of snow February: 7.5 in of snow 7.5 March: 2.8 in of snow April: 0.0 in of snow 0.0 May: 0.0 in of snow June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 0.1 in of snow December: 2.5 in of snow JFMAMJJASOND

How humid is Baltimore?

Muggy days peak in July, at about 19 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 3 muggy days June: 11 muggy days July: 19 muggy days 19 August: 17 muggy days September: 8 muggy days October: 1 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Baltimore-Washington Intl Airport, 9.0 mi SSW of the city center.

How much daylight?

Daylight ranges from about 9.5 hours in December to 14.9 hours in June.

January: 9.8 hours of daylight February: 10.7 hours of daylight March: 12.0 hours of daylight April: 13.3 hours of daylight May: 14.3 hours of daylight June: 14.9 hours of daylight 14.9 July: 14.6 hours of daylight August: 13.7 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.0 hours of daylight December: 9.4 hours of daylight 9.4 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Baltimore, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 43°F25°F 3.1 in10 6.4 in 0 9.8 h
February 46°F27°F 2.9 in9 7.5 in 0 10.7 h
March 55°F34°F 4.0 in11 2.8 in 0 12.0 h
April 67°F44°F 3.4 in11 0.0 in 0 13.3 h
May 76°F53°F 3.9 in12 0.0 in 3 14.3 h
June 84°F63°F 4.0 in11 0.0 in 11 14.9 h
July 89°F68°F 4.5 in10 0.0 in 19 14.6 h
August 87°F66°F 4.1 in10 0.0 in 17 13.7 h
September 80°F59°F 4.4 in9 0.0 in 8 12.4 h
October 68°F47°F 3.9 in9 0.0 in 1 11.2 h
November 57°F37°F 3.1 in9 0.1 in 0 10.0 h
December 48°F30°F 3.7 in10 2.5 in 0 9.4 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Baltimore

By our comfort score, the best months are April and May.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 351614
Feb 402610
Mar 52573
Apr 671361
May 701472
Jun 57677
Jul 461713
Aug 49268
Sep 611163
Oct 651550
Nov 50651
Dec 38168

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Baltimore

The last spring frost typically comes around Mar 24, and the first fall frost around Nov 21, leaving 244 frost-free days in a typical year.

Frost and freeze dates for Baltimore
Typical date1 year in 10
Last spring frost (32°F)Mar 24after Apr 4
First fall frost (32°F)Nov 21before Nov 7
Last hard freeze (28°F)Mar 11after Mar 26
First hard freeze (28°F)Dec 5before Nov 18
Frost-free season244 daysunder 224 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Md Sci Ctr Baltimore (USW00093784), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Maryland.

Hottest and coldest readings, 1991-2020

The highest reading was 106°F (July 22, 2011); the lowest was -5°F (January 19, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Baltimore

Similar climates elsewhere

Also covers

Columbia uses the same temperature and rain stations as Baltimore, so its monthly numbers are the ones on this page.

Where the numbers come from

  • Temperature, rain, snowfall, snow depth and humidity and wind by hour: Baltimore Wash Intl Airport (USW00093721), 9.4 mi SSW of the city center, 156 ft (120 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Frost dates: Md Sci Ctr Baltimore (USW00093784), 0.7 mi SSE of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
  • Cloud cover: Camp Springs Andrews AFB (USW00013705), 36 mi SSW of the city center, 282 ft (246 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Baltimore-Washington Intl Airport (724060-93721), 9.0 mi SSW of the city center, 138 ft (102 ft higher than the city). Hourly observations, 1991-2020.

Distances from the city center (USGS). Methodology · Report an error