National Weather Service Forecast for: Petersburg AK
Issued by: National Weather Service Juneau, AK
Updated: 9:48 pm AKDT Sep 12, 2026
 
Today

Today: Sunny, with a high near 63. Calm wind becoming northwest around 5 mph in the morning.
Sunny
 Tonight

Tonight: Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming calm.
Partly Cloudy
 Monday

Monday: Partly sunny, with a high near 62. Calm wind becoming northwest around 5 mph.
Partly Sunny
 Monday
Night
Monday Night: Partly cloudy, with a low around 47. Calm wind.
Partly Cloudy
 Tuesday

Tuesday: Mostly cloudy, with a high near 60. Calm wind.
Mostly Cloudy
 Tuesday
Night
Tuesday Night: A 50 percent chance of rain after 7pm. Mostly cloudy, with a low around 48.
Chance Rain
 Wednesday

Wednesday: Rain likely. Cloudy, with a high near 58. Chance of precipitation is 70%.
Rain Likely
 Wednesday
Night
Wednesday Night: Rain likely. Mostly cloudy, with a low around 50.
Rain Likely
 Thursday

Thursday: Rain likely, mainly before 10am. Cloudy, with a high near 58.
Rain Likely
Hi 63 °F Lo 47 °F Hi 62 °F Lo 47 °F Hi 60 °F Lo 48 °F Hi 58 °F Lo 50 °F Hi 58 °F

 

Today
 
 Sunny, with a high near 63. Calm wind becoming northwest around 5 mph in the morning.
Tonight
 
 Partly cloudy, with a low around 47. Northwest wind around 5 mph becoming calm.
Monday
 
 Partly sunny, with a high near 62. Calm wind becoming northwest around 5 mph.
Monday Night
 
 Partly cloudy, with a low around 47. Calm wind.
Tuesday
 
 Mostly cloudy, with a high near 60. Calm wind.
Tuesday Night
 
 A 50 percent chance of rain after 7pm. Mostly cloudy, with a low around 48.
Wednesday
 
 Rain likely. Cloudy, with a high near 58. Chance of precipitation is 70%.
Wednesday Night
 
 Rain likely. Mostly cloudy, with a low around 50.
Thursday
 
 Rain likely, mainly before 10am. Cloudy, with a high near 58.
Thursday Night
 
 A chance of showers. Mostly cloudy, with a low around 48.
Friday
 
 A chance of showers. Mostly cloudy, with a high near 58.
Friday Night
 
 A chance of showers. Mostly cloudy, with a low around 48.
Saturday
 
 Showers likely. Mostly cloudy, with a high near 58.

 

Forecast from NOAA-NWS for Petersburg AK.