NWS Forecast for Petersburg AK

National Weather Service Forecast for: Petersburg AK
Issued by: National Weather Service Juneau, AK

Updated: 7:34 pm AKST Dec 22, 2025

Tonight Partly Cloudy	Tuesday Mostly Sunny	Tuesday Night Partly Cloudy	Wednesday Sunny	Wednesday Night Partly Cloudy	Christmas Day Chance Snow	Thursday Night Chance Snow	Friday Mostly Cloudy then Heavy Snow	Friday Night Heavy Snow
Lo 6 °F	Hi 14 °F	Lo 9 °F	Hi 18 °F	Lo 11 °F	Hi 20 °F	Lo 13 °F	Hi 19 °F	Lo 15 °F

Cold Weather Advisory
Special Weather Statement

Tonight	Partly cloudy, with a low around 6. Calm wind.
Tuesday	Mostly sunny, with a high near 14. Calm wind.
Tuesday Night	Partly cloudy, with a low around 9. Calm wind becoming east around 5 mph.
Wednesday	Sunny, with a high near 18. Calm wind.
Wednesday Night	Partly cloudy, with a low around 11. Calm wind.
Christmas Day	A 50 percent chance of snow after 9am. Partly sunny, with a high near 20.
Thursday Night	A 50 percent chance of snow before 3am. Mostly cloudy, with a low around 13.
Friday	A chance of snow after 3pm. The snow could be heavy at times. Mostly cloudy, with a high near 19.
Friday Night	Snow, mainly after 9pm. The snow could be heavy at times. Cloudy, with a low around 15.
Saturday	Snow. The snow could be heavy at times. Cloudy, with a high near 33.
Saturday Night	Snow. The snow could be heavy at times. Cloudy, with a low around 28.
Sunday	Rain and snow. The snow could be heavy at times. Cloudy, with a high near 35.
Sunday Night	Rain and snow. Cloudy, with a low around 31.
Monday	Rain and snow likely. Cloudy, with a high near 35.

Forecast from NOAA-NWS for Petersburg AK.