Milwaukee Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Milwaukee, Wisconsin 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 Milwaukee, 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 Milwaukee, 2010 to 2019
High °F Low °F   High °C Low °C
30 16 January -1 -9
33 18 February 0 -8
43 29 March 6 -2
54 37 April 12 3
67 48 May 19 9
76 58 June 24 14
82 65 July 28 19
80 64 August 27 18
73 57 September 23 14
61 45 October 16 7
46 32 November 8 0
36 24 December 2 -5
57 41 Year 14 5
30-year temperature averages for Milwaukee, 1991 to 2020
High °F Low °F   High °C Low °C
31 17 January -1 -8
34 20 February 1 -7
44 29 March 7 -2
55 38 April 13 3
67 48 May 19 9
77 58 June 25 15
82 65 July 28 18
80 64 August 27 18
74 56 September 23 14
61 45 October 16 7
48 33 November 9 1
36 23 December 2 -5
57 41 Year 14 5

Days of Hot Weather in Milwaukee

A hot day at Milwaukee means highs in the 80s Fahrenheit. Nine days a year on average reach into the 90s (above 32 °C). Temperatures of 100 degrees F (38 °C) or more are not normal here.

Days per month in Milwaukee 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 0 0 0
March 1 0 0
April 3 1 0
May 11 5 0
June 22 12 2
July 29 18 4
August 29 15 3
September 19 7 1
October 6 1 0
November 1 0 0
December 0 0 0
Year 121 59 9

How Often Milwaukee Has Cold Temperatures

Milwaukee averages seven nights a year when the temperature drops to 0 °F (-18 °C) or less.

About half of winter days here stay below freezing for the entire day. From late fall to early spring, the city typically has 50 frosty days.

Days per month on average in Milwaukee when the minimum temperature drops to 10, 20, or 32 °F or below
  10 °F
-12 °C
20 °F
-8 °C
32 °F
0 °C
January 9 18 28
February 6 14 25
March 1 6 21
April 0 0 6
May 0 0 0
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 0
October 0 0 2
November 0 3 15
December 5 12 25
Year 22 52 123
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.

Wisconsin Temperatures
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