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 60, 70 or 80 °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 1981 to 2010 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, 1981 to 2010
High °F Low °F   High °C Low °C
29 16 January -2 -9
33 19 February 0 -7
42 28 March 6 -2
54 37 April 12 3
65 47 May 18 8
75 57 June 24 14
80 64 July 27 18
79 63 August 26 17
71 55 September 22 13
59 43 October 15 6
46 32 November 8 0
33 20 December 0 -7
56 40 Year 13 5

Days of Hot Weather in Milwaukee

A hot day at Milwaukee means highs in the 80s Fahrenheit. Just seven days a year on average reach into the 90s (above 32 °C). Once a decade, the thermometer makes it to 100 degrees F (38 °C).

The 90-degree weather can show up anytime from May to September. But July is when most of the hot weather happens.

Days per month in Milwaukee of at least 60, 70 or 80 °F
  60 °F
16 °C
70 °F
21 °C
80 °F
27 °C
January 0 0 0
February 0 0 0
March 3 0 0
April 8 3 1
May 20 10 3
June 28 21 10
July 31 28 16
August 31 28 12
September 27 17 5
October 14 5 1
November 3 0 0
December 0 0 0
Year 165 113 49

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 52 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 19 29
February 6 13 25
March 1 5 22
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 14
December 6 14 26
Year 22 55 126
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. 1981-2010 U.S. Climate Normals. (Data Access. FTP.)

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