| NWS Forecast for: Petersburg Borough Issued by: National Weather Service Juneau, AK Last Update: 730 PM AKDT Fri Jul 31 2026 |  |
| Tonight: Mostly cloudy. Chance of rain showers in the evening. Rain showers likely late. Lows in the lower 50s. Southwest winds 10 to 15 mph early in the evening becoming light. Saturday: Chance of rain showers in the morning, then rain showers in the afternoon. Highs 61 to 67. Light winds. Saturday Night: Rain showers in the evening, then slight chance of rain showers late. 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. Slight chance of rain showers. Lows in the mid 50s. Light winds. Monday: Mostly cloudy. Highs 66 to 74. Monday Night: Partly cloudy. Lows in the lower 50s. Tuesday: Mostly cloudy. Highs 65 to 73. Tuesday Night: Mostly cloudy. Lows in the lower 50s. Wednesday: Mostly cloudy. Highs 65 to 72. Wednesday Night: Partly cloudy. Lows in the lower 50s. Thursday: Mostly cloudy. Highs 64 to 71. Thursday Night: Mostly cloudy. Chance of rain showers. Lows in the lower 50s. Friday: Mostly cloudy. Chance of rain showers. Highs 64 to 71. | |
| Zone Forecast: Petersburg Borough | |
Visit your local NWS office at: https://www.weather.gov/Juneau |