Petersburg, AK has a maritime climate, meaning temperatures are milder than the rest of Alaska. The average annual temperature is 41.3 °F (5.2 °C), with monthly highs ranging from 48–59 °F (9–15 °C) in the summer and 28–37 °F (-2 to 3°C) during the winter months. Petersburg experiences light precipitation all year round, mostly in the form of rain or snow, though snowfall is light due to its warmer climate. The town also benefits from abundant sunshine throughout most of the year.
Petersburg, Alaska gets 109 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Petersburg averages 77 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 96 sunny days per year in Petersburg. The US average is 205 sunny days.
Petersburg gets some kind of precipitation, on average, 233 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Summer High: the July high is around 64 degrees
Winter Low: the January low is 26
Rain: averages 109 inches of rain a year
Snow: averages 77 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Petersburg is 5.2 (10=best), which means it is more comfortable than most places in Alaska.
7.5 / 3.2
Summer / Winter
July, August and June are the most pleasant months in Petersburg, while January and December are the least comfortable months.