Missoula Temperatures: Averages by Month





The numbers here tell you how hot and cold the weather usually is in Missoula, Montana 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 Missoula, scroll down farther. There are also monthly and yearly counts of days with cold weather.

All the numbers are long-term historical averages based on climate data gathered from 1981 to 2010.

Average Missoula temperatures
High °F Low °F   High °C Low °C
33 18 January 1 -8
39 21 February 4 -6
50 28 March 10 -2
59 33 April 15 0
67 40 May 20 4
75 47 June 24 8
86 51 July 30 11
85 50 August 29 10
73 42 September 23 5
58 32 October 14 0
42 25 November 5 -4
31 17 December -1 -9
58 34 Year 15 1

Days of Hot Weather in Missoula

While Missoula doesn't experience long periods of hot weather, its heat can get intense. Temperatures in the 90s Fahrenheit are mainly confined to July and August, with a day or two in June and September. Usually a couple of days in summer make it to 100 °F (38 °C) or more.

Number of days in Missoula 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 0 0 0
April 4 1 0
May 12 4 0
June 20 10 2
July 29 23 11
August 28 23 10
September 18 10 1
October 4 0 0
November 0 0 0
December 0 0 0
Year 117 72 25

How Often Missoula Has Cold Temperatures

Freezing temperatures at night are the norm in Missoula from late October until early April. Usually May and September also get a few nights of frost. The coldest nights of winter drop to 0 °F or below.

On an average of 38 days annually the thermometer here never rises above freezing. Days that chilly can occur during November to March.

Days per month on average in Missoula when the minimum temperature drops to 32, 20 or 10 °F or below
  0 °F
-18 °C
10 °F
-12 °C
20 °F
-8 °C
January 3 7 15
February 2 4 10
March 0 1 3
April 0 0 0
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 2 7
December 2 7 18
Year 7 20 54
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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