Yellowstone National Park
Monthly Weather Summary
Temperature
| Month | Mean High Temperature F |
Mean Low Temperature F |
| January | 23.0 | -1.7 |
| February | 28.0 | -1.0 |
| March | 34.6 | 3.6 |
| April | 42.8 | 14.5 |
| May | 52.3 | 24.9 |
| June | 61.2 | 32.8 |
| July | 71.5 | 38.4 |
| August | 71.0 | 37.3 |
| September | 61.4 | 29.4 |
| October | 49.2 | 21.8 |
| November | 33.9 | 11.3 |
| December | 25.3 | 2.6 |
Precipitation
| Month | Mean Precipitation in. | Mean Total Snowfall in. |
| January | 2.00 | 35.1 |
| February | 1.48 | 25.2 |
| March | 1.64 | 26.0 |
| April | 1.57 | 15.5 |
| May | 1.94 | 5.9 |
| June | 2.21 | 0.8 |
| July | 1.53 | 0.0 |
| August | 1.67 | 0.1 |
| September | 1.61 | 1.4 |
| October | 1.33 | 7.7 |
| November | 1.64 | 22.9 |
| December | 1.74 | 30.2 |
| Annual | 20.35 | 170.6 |
Annual temperature and precipitation data taken at Lake Yellowstone Station from 1948 to 2006
Source: Western Regional Climate Center
