Baltimore Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Baltimore, Maryland during each month of the year.

The average high and low temperatures are listed below monthly and annually for the city, in both degrees Fahrenheit and Celsius.

Maximums and minimums are only part of the temperature picture. To fill in the rest, there's information on how many days a month get above or below a given temperature.

To find out how often it rises over 70, 80 or 90 °F each month in Baltimore, scroll down farther. There are also monthly and yearly counts of days with cold weather.

The first set of high and low temperatures are averages for 2010 to 2019. Everything else here is based on 1991 to 2020 weather.

10-year temperature averages for Baltimore, 2010 to 2019
High °F Low °F   High °C Low °C
42 25 January 6 -4
46 27 February 8 -3
54 34 March 12 1
67 45 April 20 7
76 56 May 25 13
85 64 June 29 18
89 69 July 32 21
86 66 August 30 19
81 61 September 27 16
69 49 October 20 9
56 36 November 13 2
48 32 December 9 0
67 47 Year 19 8
30-year temperature averages for Baltimore, 1991 to 2020
High °F Low °F   High °C Low °C
43 25 January 6 -4
46 27 February 8 -3
55 34 March 13 1
67 44 April 19 6
76 53 May 24 12
84 63 June 29 17
89 68 July 32 20
87 66 August 30 19
80 59 September 27 15
68 47 October 20 8
57 37 November 14 3
48 30 December 9 -1
67 46 Year 19 8

Days of Hot Weather in Baltimore

Baltimore regularly gets 90-degree Fahrenheit weather during summer. As well, a day with temperatures in the 90s can happen as early as April or as late as October.

The thermometer sometimes reaches 100 °F (38 °C) here. The temperature has climbed to 100 or more on an average of one day a year.

Days per month in Baltimore of at least 70, 80 or 90 °F
  70 °F
21 °C
80 °F
27 °C
90 °F
32 °C
January 0 0 0
February 1 0 0
March 4 1 0
April 11 3 0
May 22 11 2
June 29 23 7
July 31 29 13
August 31 27 8
September 27 14 3
October 13 3 0
November 3 0 0
December 1 0 0
Year 172 111 34

How Often Baltimore Has Cold Temperatures

The coldest winter nights at Baltimore get down to 0 °F (-18 °C) or less. But temperatures that low are rare, happening on average just once a decade.

Baltimore typically has 11 days a year when the temperature never rises above freezing. Frosty days can occur anytime from December to March, but are most common in January.

Days per month on average in Baltimore when the minimum temperature drops to 32, 20, or 10 °F or below
  10 °F
-12 °C
20 °F
-8 °C
32 °F
0 °C
January 2 9 24
February 1 6 21
March 0 2 14
April 0 0 2
May 0 0 0
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 0 0 1
November 0 0 10
December 0 4 21
Year 3 21 93
References

Jay Lawrimore, Ron Ray, Scott Applequist, Bryant Korzeniewski, Matthew Menne. 2016. Global Summary of the Month and Year, Version 1.0. NOAA National Centers for Environmental Information.

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

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