| NWS Forecast for: Petersburg Borough Issued by: National Weather Service Juneau, AK Last Update: 310 AM AKDT Fri Jul 31 2026 | |
| Today: Rain showers likely. Highs 64 to 70. Light winds. Tonight: Mostly cloudy. Chance of rain showers. Lows in the lower 50s. Light winds. Saturday: Mostly cloudy. Chance of rain showers. Highs 61 to 67. Light winds. Saturday Night: Cloudy. Chance of rain showers. Lows in the lower 50s. Light winds. Sunday: Mostly cloudy. Slight chance of rain showers. Highs 65 to 71. Light winds. Sunday Night: Mostly cloudy. Lows in the mid 50s. Monday: Mostly cloudy. Highs 67 to 75. Monday Night: Mostly clear. Lows in the lower 50s. Tuesday: Partly cloudy. Highs 66 to 74. Tuesday Night: Mostly cloudy. Lows in the lower 50s. Wednesday: Mostly cloudy. Highs 66 to 74. Wednesday Night: Partly cloudy. Lows in the lower 50s. Thursday: Mostly cloudy. Chance of rain showers. Highs 66 to 72. | |
| Zone Forecast: Petersburg Borough | |
Visit your local NWS office at: https://www.weather.gov/Juneau |