National Weather Service Forecast for: Petersburg AK
Issued by: National Weather Service Juneau, AK
Updated: 3:53 am AKDT Jul 28, 2026
 
This
Afternoon
This Afternoon: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 60. North wind around 5 mph. Chance of precipitation is 60%.
Showers
Likely

 Tonight

Tonight: Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Showers
Likely and
Patchy Fog

 Wednesday

Wednesday: Showers, mainly before 4pm. High near 59. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Showers


 Wednesday
Night
Wednesday Night: A 30 percent chance of showers before 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm.
Chance
Showers and
Patchy Fog
then Patchy
Fog
 Thursday

Thursday: Mostly sunny, with a high near 66. Calm wind becoming northwest around 5 mph.
Mostly Sunny


 Thursday
Night
Thursday Night: A 40 percent chance of showers after 10pm. Mostly cloudy, with a low around 51.
Chance
Showers

 Friday

Friday: A 40 percent chance of showers. Cloudy, with a high near 64.
Chance
Showers

 Friday
Night
Friday Night: A chance of showers. Cloudy, with a low around 51.
Chance
Showers

 Saturday

Saturday: Showers likely, mainly after 10am. Cloudy, with a high near 62.
Showers
Likely
Hi 60 °F Lo 51 °F Hi 59 °F Lo 48 °F Hi 66 °F Lo 51 °F Hi 64 °F Lo 51 °F Hi 62 °F

 

This Afternoon
 
 Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 60. North wind around 5 mph. Chance of precipitation is 60%.
Tonight
 
 Showers and thunderstorms likely before 10pm, then showers likely and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
 Showers, mainly before 4pm. High near 59. Southeast wind around 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
 A 30 percent chance of showers before 10pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 48. Southeast wind around 5 mph becoming calm.
Thursday
 
 Mostly sunny, with a high near 66. Calm wind becoming northwest around 5 mph.
Thursday Night
 
 A 40 percent chance of showers after 10pm. Mostly cloudy, with a low around 51.
Friday
 
 A 40 percent chance of showers. Cloudy, with a high near 64.
Friday Night
 
 A chance of showers. Cloudy, with a low around 51.
Saturday
 
 Showers likely, mainly after 10am. Cloudy, with a high near 62.
Saturday Night
 
 A chance of showers. Cloudy, with a low around 51.
Sunday
 
 A chance of showers. Cloudy, with a high near 62.
Sunday Night
 
 Mostly cloudy, with a low around 51.
Monday
 
 Mostly cloudy, with a high near 63.

 

Forecast from NOAA-NWS for Petersburg AK.