Precipitation ranges from 10 inches (26 cm) at North boundary to 80 inches (205 cm) in the Southwest corner
Temperatures range from 10° F (-12° C) mean in January to 55° F (13° C) mean in July at Yellowstone Lake in the center of the park
Record High Temp: 98° F (37° C) – Lamar 1936
Record Low Temp: -66° F (-54° C) – Madison 1933
Yellowstone’s Average Temperatures and Precipitation
| Weather Data – 48 Year Average | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| Average Maximum Temperature (F) | 28.6 | 34.0 | 39.6 | 49.4 | 60.4 | 70.0 | 79.6 | 78.3 | 67.8 | 55.7 | 38.7 | 30.5 | 52.8 |
| Average Minimum Temperature (F) | 9.6 | 13.0 | 17.2 | 26.0 | 34.3 | 41.2 | 46.7 | 45.3 | 37.0 | 29.4 | 19.2 | 11.8 | 27.6 |
| Average Precipitation (Inches) | 1.1 | 0.75 | 1.1 | 1.2 | 2.0 | 2.0 | 1.5 | 1.4 | 1.3 | 1.0 | 1.0 | 1.0 | 15.4 |
| Average Total Snow Fall (Inches) | 14.5 | 10.4 | 13.1 | 5.9 | 1.5 | 0.1 | 0.0 | 0.0 | 0.5 | 3.7 | 9.0 | 13.5 | 72.1 |