Sitka weather is typical southeast Alaska weather, meaning its wetter, typically warmer in the winter and cooler in the summer, than southcentral, interior or western Alaska. In an average year, 2/3 of the days are rainy, with an average annual rainfall of about 83 inches. Average snowfall is about 64 inches.
Sitka weather would be considered on the cold side for the lower 48 but is pretty mild by Alaska standards. In January, the average high is about 35℉, while the average low is a balmy 30℉. In August, the warmest month of the year in Sitka, average temps range from 51℉ to 58℉. In a typical year, the low temperature will be about 20℉ and the high temperature will be about 70℉. Like most of Alaska, Sitka weather is typically best in the summer months of May through August.
May and June are usually the months with the least amount of rain, closely followed by July. In a usual year, these months average 3.8, 3.9 and 4.3 inches of rain. November is usually the rainiest month of the year with average rainfall over 10 inches. Interestingly enough, February is usually the month with the least number of days of rainfall (15) while October typically has the most and averages 24 days of rain.
Because Sitka is a seaside town, Sitka weather tends toward humid. Average humidity is in the 80-90% range for the entire year. The longest day of the year, summer solstice, has nearly 18 hours of daylight, while the shortest day, winter solstice, has 7 hours.
Generally speaking, it’s more windy in the winter months and less windy in the summer, which is good for anglers. Wind speeds typically range from 5- to 25 mph, with wind direction fluctuating over the year.
Sitka weather doesn’t get too cold or too hot, providing favorable conditions for cold water fish. Water temperatures range from about 40℉ to 55℉ over the course of the year.