NWS Forecast for Petersburg AK

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

Updated: 8:01 pm AKDT Jun 29, 2026

Tonight Partly Cloudy	Tuesday Mostly Cloudy	Tuesday Night Chance Showers	Wednesday Showers	Wednesday Night Showers Likely then Chance Showers	Thursday Chance Showers	Thursday Night Chance Showers	Friday Chance Showers	Friday Night Showers Likely
Lo 48 °F	Hi 60 °F	Lo 48 °F	Hi 56 °F	Lo 46 °F	Hi 59 °F	Lo 47 °F	Hi 59 °F	Lo 48 °F

Tonight	Partly cloudy, with a low around 48. West wind around 5 mph.
Tuesday	Mostly cloudy, with a high near 60. Northwest wind around 5 mph.
Tuesday Night	A 40 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 48. Calm wind.
Wednesday	Showers, mainly after 10am. High near 56. Calm wind. Chance of precipitation is 80%.
Wednesday Night	Showers likely, mainly before 10pm. Mostly cloudy, with a low around 46. Calm wind. Chance of precipitation is 70%.
Thursday	A 40 percent chance of showers. Mostly cloudy, with a high near 59.
Thursday Night	A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Friday	A chance of showers. Cloudy, with a high near 59.
Friday Night	Showers likely. Cloudy, with a low around 48.
Independence Day	Showers likely. Cloudy, with a high near 59.
Saturday Night	Showers likely. Mostly cloudy, with a low around 48.
Sunday	A chance of showers. Mostly cloudy, with a high near 60.
Sunday Night	A chance of showers. Mostly cloudy, with a low around 48.
Monday	A chance of showers. Mostly cloudy, with a high near 61.

Forecast from NOAA-NWS for Petersburg AK.