About Katmai Weather
Katmai National Park features "typical" Alaska weather. Winters, early spring, and late fall are cold and snowy. Summers are rainy, overcast, and unpredictable. The National Park Service estimates that the skies are clear about 20% of the time in summer. Rain can last for days at a time. Strong winds are also common, and can occasionally gust to 50-60 miles per hour. The statistics below are taken from King Salmon, Alaska, located just west of the park boundary and the sites of the park's headquarters.
| Month | Avg High | Avg Low | Record High | Record Low | Avg Pcpt |
| January | 23° | 8° | 53°/1963 | -48°/1989 | 1.03" |
| February | 24° | 7° | 57°/1991 | -43°/2006 | 0.72" |
| March | 32° | 15° | 59°/1934 | -42°/1971 | 0.79" |
| April | 41° | 25° | 69°/2005 | -19°/1956 | 0.94" |
| May | 52° | 35° | 85°/2006 | 4°/1945 | 1.35" |
| June | 60° | 42° | 88°/1953 | 27°/2006 | 1.70" |
| July | 64° | 48° | 86°/1951 | 33°/1993 | 2.15" |
| August | 62° | 47° | 84°/1968 | 25°/1984 | 2.89" |
| September | 55° | 40° | 75°/1933 | 15°/2003 | 2.81" |
| October | 41° | 26° | 67°/1954 | -12°/1983 | 2.10" |
| November | 31° | 16° | 56°/1986 | -28°/1988 | 1.54" |
| December | 25° | 9° | 49°/2002 | -38°/2001 | 1.39" |
