About Lake Clark Weather
Lake Clark National Park's weather is broken into two areas: those areas along the coast and those in the interior of the park. The sea moderates the temperatures, and leads to a higher level of precipitation. The interior is very cold in winter, and has much less precipitation. The weather in Lake Clark is even more unpredictable than most areas of Alaska. High winds, rain, snow, fog, and sunny skies can occur at any time, often during the same day. The statistics below are taken from Port Alsworth, located within the park and the location of park headquarters.

| Month | Avg High | Avg Low | Record High | Record Low | Avg Pcpt |
| January | 23° | 7° | 54°/1963 | -53°/1973 | 0.79" |
| February | 25° | 7° | 54°/1982 | -55°/1971 | 0.58" |
| March | 34° | 14° | 56°/1970 | -50°/1966 | 0.65" |
| April | 44° | 26° | 70°/2005 | -18°/1972 | 0.48" |
| May | 55° | 37° | 81°/1997 | 13°/1967 | 0.48" |
| June | 63° | 45° | 89°/2004 | 20°/1975 | 0.92" |
| July | 67° | 49° | 89°/2004 | 25°/1974 | 1.40" |
| August | 64° | 48° | 87°/2004 | -13°/1971 | 2.06" |
| September | 55° | 41° | 75°/1963 | 13°/1983 | 2.09" |
| October | 41° | 28° | 66°/1963 | -13°/1971 | 1.37" |
| November | 31° | 17° | 55°/1986 | -24°/1990 | 1.25" |
| December | 25° | 10° | 53°/1961 | -48°/1968 | 1.08" |
