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).
| 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 |
| 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.
| 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.
| 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.