About Grand Teton Weather
Grand Teton National Park weather is typical of the northern Rockies region. Summers are short but warm, with frequent afternoon thunderstorms. Even in summer the nights are quite cool. Spring and fall can be pleasant, but the potential for winter weather is high, and often occurs with little or no warning. Winter is long and cold, with heavy snows.
| Month | Avg High | Avg Low | Record High | Record Low | Avg Pcpt |
| January | 27° | 2° | 51°/1974 | -52°/1930 | 3.22" |
| February | 33° | 4° | 60°/1915 | -63°/1933 | 2.37" |
| March | 41° | 13° | 63°/2004 | -43°/1922 | 2.24" |
| April | 49° | 21° | 73°/1987 | -28°/1945 | 2.00" |
| May | 58° | 30° | 82°/1936 | 5°/1929 | 2.32" |
| June | 69° | 38° | 92°/1926 | 18°/1929 | 1.53" |
| July | 78° | 42° | 92°/2003 | 23°/1988 | 1.35" |
| August | 77° | 41° | 92°/2003 | 19°/1928 | 1.27" |
| September | 68° | 34° | 87°/1924 | 7°/1926 | 1.40" |
| October | 55° | 26° | 79°/1934 | -11°/1917 | 1.59" |
| November | 37° | 16° | 64°/1999 | -45°/1938 | 2.88" |
| December | 27° | 5° | 53°/1939 | -50°/1924 | 2.99" |
