Denver Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Denver, Colorado during each month of the year.
The average high and low temperatures are listed below monthly and annually for Denver, 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 Denver, 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.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 46 | 18 | January | 8 | -8 |
| 44 | 18 | February | 7 | -8 |
| 56 | 28 | March | 13 | -2 |
| 62 | 34 | April | 17 | 1 |
| 68 | 43 | May | 20 | 6 |
| 85 | 54 | June | 29 | 12 |
| 89 | 60 | July | 32 | 16 |
| 88 | 58 | August | 31 | 14 |
| 82 | 51 | September | 28 | 10 |
| 66 | 37 | October | 19 | 3 |
| 55 | 26 | November | 13 | -3 |
| 45 | 18 | December | 7 | -8 |
| 65 | 37 | Year | 19 | 3 |
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 47 | 18 | January | 8 | -8 |
| 48 | 19 | February | 9 | -7 |
| 56 | 27 | March | 14 | -3 |
| 63 | 34 | April | 17 | 1 |
| 72 | 43 | May | 22 | 6 |
| 84 | 53 | June | 29 | 12 |
| 90 | 59 | July | 32 | 15 |
| 88 | 57 | August | 31 | 14 |
| 80 | 48 | September | 27 | 9 |
| 67 | 36 | October | 19 | 2 |
| 55 | 26 | November | 13 | -4 |
| 46 | 18 | December | 8 | -8 |
| 66 | 37 | Year | 19 | 3 |
Days of Hot Weather in Denver
Denver usually gets a taste of scorching hot weather each year. On average, the thermometer hits 100 degrees Fahrenheit two days in summer. Temperatures in the 90s occur from May to September, including on about half of July days.
Winters are much cooler. Just a few days from December to February make it to 60 degrees, and just one normally reaches past 70.
Regardless of how warm the days get, Denver cools down at night to below 70 °F. Summer nights can stay in the 60s, but outside of July lows are more often down to the 50s. From October to April, nighttime temperatures in Denver normally fall below 50 degrees.
| 70 °F 21 °C |
80 °F 27 °C |
90 °F 32 °C | |
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 1 | 0 | 0 |
| March | 4 | 0 | 0 |
| April | 9 | 2 | 0 |
| May | 18 | 8 | 1 |
| June | 27 | 20 | 8 |
| July | 30 | 28 | 17 |
| August | 30 | 27 | 13 |
| September | 25 | 17 | 4 |
| October | 14 | 5 | 0 |
| November | 4 | 0 | 0 |
| December | 0 | 0 | 0 |
| Year | 163 | 106 | 42 |
How Often Denver Has Cold Temperatures
Denver has freezing temperatures more frequently than other metropolitan areas its size. Nighttime lows can drop to 32 degrees or less in all but three months a year.
The coldest nights get to zero degrees Fahrenheit or below. Temperatures in negative territory happen five times a year on average, scattered among January, February and December.
Despite the frequency of night frost, Denver usually thaws during the day. Just 21 days a year typically have highs that don't break through the 32-degree freezing point. Weather this chilly shows up anytime from October to April, with any one month averaging at most five days.
| 10 °F -12 °C |
20 °F -8 °C |
32 °F 0 °C | |
|---|---|---|---|
| January | 2 | 6 | 17 |
| February | 1 | 4 | 13 |
| March | 0 | 1 | 5 |
| April | 0 | 0 | 1 |
| 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 | 1 | 7 |
| December | 1 | 6 | 18 |
| Year | 5 | 19 | 62 |
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.