National Weather Service Forecast for: Petersburg AK
Issued by: National Weather Service Juneau, AK
Updated: 9:31 am AKDT Jul 12, 2026
 
Today

Today: Partly sunny, with a high near 62. South wind around 5 mph.
Partly Sunny

 Tonight

Tonight: Areas of fog after 4am. Otherwise, partly cloudy, with a low around 49. South wind around 5 mph becoming calm.
Partly Cloudy
then Areas
Fog
 Monday

Monday: Areas of fog before 7am. Otherwise, mostly cloudy, with a high near 63. Calm wind becoming southeast around 5 mph.
Areas Fog
then Mostly
Cloudy
 Monday
Night
Monday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Calm wind.
Decreasing
Clouds
 Tuesday

Tuesday: Mostly sunny, with a high near 65. Calm wind becoming northwest around 5 mph in the afternoon.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 50.
Partly Cloudy

 Wednesday

Wednesday: Partly sunny, with a high near 65.
Partly Sunny

 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 52.
Mostly Cloudy

 Thursday

Thursday: Mostly cloudy, with a high near 64.
Mostly Cloudy
Hi 62 °F Lo 49 °F Hi 63 °F Lo 48 °F Hi 65 °F Lo 50 °F Hi 65 °F Lo 52 °F Hi 64 °F

 

Today
 
 Partly sunny, with a high near 62. South wind around 5 mph.
Tonight
 
 Areas of fog after 4am. Otherwise, partly cloudy, with a low around 49. South wind around 5 mph becoming calm.
Monday
 
 Areas of fog before 7am. Otherwise, mostly cloudy, with a high near 63. Calm wind becoming southeast around 5 mph.
Monday Night
 
 Mostly cloudy, then gradually becoming mostly clear, with a low around 48. Calm wind.
Tuesday
 
 Mostly sunny, with a high near 65. Calm wind becoming northwest around 5 mph in the afternoon.
Tuesday Night
 
 Partly cloudy, with a low around 50.
Wednesday
 
 Partly sunny, with a high near 65.
Wednesday Night
 
 Mostly cloudy, with a low around 52.
Thursday
 
 Mostly cloudy, with a high near 64.
Thursday Night
 
 Mostly cloudy, with a low around 50.
Friday
 
 Mostly cloudy, with a high near 62.
Friday Night
 
 A chance of showers. Cloudy, with a low around 50.
Saturday
 
 A chance of showers. Cloudy, with a high near 61.

 

Forecast from NOAA-NWS for Petersburg AK.