Fort Collins Temperatures: Averages by Month





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

The average high and low temperatures are listed below monthly and annually for the ski resort, 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 Fort Collins, 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 recorded at an elevation of 4921 feet (1500 metres).

10-year temperature averages for Fort Collins, 2010 to 2019
High °F Low °F   High °C Low °C
44 16 January 7 -9
44 17 February 7 -8
57 27 March 14 -3
62 34 April 17 1
68 42 May 20 6
84 53 June 29 12
88 59 July 31 15
86 56 August 30 13
79 48 September 26 9
64 35 October 18 2
52 24 November 11 -4
42 16 December 5 -9
64 36 Year 18 2
30-year temperature averages for Fort Collins, 1991 to 2020
High °F Low °F   High °C Low °C
45 18 January 7 -8
47 21 February 8 -6
56 29 March 14 -2
63 35 April 17 2
71 44 May 22 7
82 53 June 28 12
87 59 July 31 15
85 57 August 29 14
77 48 September 25 9
64 36 October 18 2
53 26 November 11 -3
44 18 December 7 -8
65 37 Year 18 3

Days of Hot Weather in Fort Collins

During late spring and summer, Fort Collins typically has 30 days of 90-degree Fahrenheit temperatures.

The hottest days here are in the 100s Fahrenheit (over 38 °C). But that kind of heat only happens once a year on average. A day of 100-degree weather can show up in June or July.

Days per month in Fort Collins 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 4 0 0
April 9 1 0
May 18 7 0
June 28 19 6
July 31 27 13
August 30 25 8
September 24 14 2
October 11 3 0
November 2 0 0
December 0 0 0
Year 157 96 30

How Often Fort Collins Has Cold Temperatures

Nearly half the nights at Fort Collins have freezing temperatures. In a typical winter, four of those nights drop down to 0 °F (-8 °C) or lower.

The ski resort averages 15 days a year that never warm up to above freezing. A frosty day can appear any time from October to April.

Days per month on average in Fort Collins 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 6 17 29
February 4 12 26
March 1 4 22
April 0 1 9
May 0 0 1
June 0 0 0
July 0 0 0
August 0 0 0
September 0 0 1
October 0 1 9
November 1 7 24
December 5 18 30
Year 17 60 150
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.

Colorado Temperatures
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