Yellowstone Park Temperatures: Averages by Month
The numbers here tell you how hot and cold the weather usually is in Yellowstone Park, Wyoming during each month of the year.
The average high and low temperatures at the Park near Old Faithful are listed below 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 Yellowstone Park, 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 1991 to 2020.
| High °F | Low °F | High °C | Low °C | |
|---|---|---|---|---|
| 28 | 1 | January | -2 | -17 |
| 31 | 2 | February | 0 | -17 |
| 39 | 10 | March | 4 | -12 |
| 46 | 19 | April | 8 | -7 |
| 55 | 29 | May | 13 | -2 |
| 65 | 35 | June | 18 | 2 |
| 76 | 39 | July | 24 | 4 |
| 75 | 37 | August | 24 | 3 |
| 65 | 30 | September | 18 | -1 |
| 50 | 22 | October | 10 | -6 |
| 35 | 10 | November | 2 | -12 |
| 27 | 1 | December | -3 | -17 |
| 49 | 20 | Year | 10 | -7 |
Days of Hot Weather in Yellowstone Park
Even though the geysers are hot, the weather rarely is at Upper Geyser Basin in Yellowstone, due to the 7500 feet (2240 metres) of elevation. Only 21 days a year normally reach into the 80s Fahrenheit. Once every few years the air temperature here does make it 90 degrees (32 °C).
| 60 °F 16 °C |
70 °F 21 °C |
80 °F 27 °C |
|
|---|---|---|---|
| January | 0 | 0 | 0 |
| February | 0 | 0 | 0 |
| March | 0 | 0 | 0 |
| April | 2 | 0 | 0 |
| May | 11 | 3 | 0 |
| June | 22 | 11 | 1 |
| July | 30 | 26 | 10 |
| August | 30 | 26 | 8 |
| September | 22 | 11 | 1 |
| October | 7 | 1 | 0 |
| November | 0 | 0 | 0 |
| December | 0 | 0 | 0 |
| Year | 124 | 77 | 21 |
How Often Yellowstone Park Has Cold Temperatures
Freezing temperatures happen every month and most nights of the year at Old Faithful in Yellowstone Park. The place typically has 271 frosty nights a year.
On an average of 84 days annually the thermometer stays below freezing. Days that chilly can occur from October to April or May, including most of December and January.
| 0 °F -18 °C |
10 °F -12 °C |
20 °F -8 °C |
|
|---|---|---|---|
| January | 15 | 22 | 28 |
| February | 13 | 19 | 25 |
| March | 7 | 15 | 23 |
| April | 2 | 6 | 16 |
| May | 0 | 1 | 3 |
| June | 0 | 0 | 0 |
| July | 0 | 0 | 0 |
| August | 0 | 0 | 0 |
| September | 0 | 0 | 2 |
| October | 1 | 3 | 11 |
| November | 8 | 15 | 22 |
| December | 15 | 22 | 27 |
| Year | 60 | 102 | 156 |
Reference
NOAA National Centers for Environmental Information (NCEI). Climate Normals.