Alton, Maine Weather
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Weather Forecast for Alton, Maine : Penobscot County
Issued: 10:46 pm EDT Jul 17, 2025 Latitude: 45.0314546 Longitude: -68.7286452 View on Google Maps

MouseOver for Detail Forecast
Tonight Friday Saturday Sunday Monday Tuesday Wednesday Thursday
40% chance of thunderstorms on Tonight Sunny on Friday Mostly Sunny on Saturday 60% chance of thunderstorms on Sunday Sunny on Monday Sunny on Tuesday 20% chance of thunderstorms on Wednesday 20% chance of rain on Thursday
Low: 64°F High: 77°F High: 80°F High: 76°F High: 70°F High: 77°F High: 80°F High: 83°F
Low: 55°F Low: 61°F Low: 54°F Low: 51°F Low: 55°F Low: 61°F  
Thunderstorms Sunny Mostly Sunny Thunderstorms Sunny Sunny Thunderstorms Rain
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Current Conditions at
BANGOR - (KBGR)
70°
Cloudy
as of 10:53 PM EDST
Rel. Humidity: 88%
Dew Point: 66°F
Visibility: 10 Miles
Pressure: 29.63 in.
Flight Rule: IFR
Wind Data
8 MPH
180° South
Cloud Level(s): Broken at 500ft, Solid Overcast at 6000ft
Current Conditions at
MILLINOCKET - (KMLT)
73°
Mostly Cloudy
as of 11:18 PM EDST
Rel. Humidity: 88%
Dew Point: 70°F
Visibility: 10 Miles
Pressure: 29.61 in.
Flight Rule: MVFR
Wind Data
3 MPH
Cloud Level(s): Scattered at 1100ft, Broken at 2200ft, Broken at 5000ft
Current Conditions at
BAR HARBOR - (KBHB)
66°
Cloudy
Mist
as of 10:56 PM EDST
Rel. Humidity: 100%
Dew Point: 66°F
Visibility: 3/4 Miles
Pressure: 29.65 in.
Flight Rule: LIFR
Wind Data
10 MPH
200° South
Cloud Level(s): Solid Overcast at 100ft
Current Conditions at
GREENVILLE - (KGNR)
73°
Clear
as of 10:56 PM EDST
Rel. Humidity: 94%
Dew Point: 72°F
Pressure: 29.62 in.
Wind Data
Calm
40% chance of thunderstorms Tonight Tonight... Scattered showers and thunderstorms, mainly before 1am. Areas of fog. Otherwise, mostly cloudy, with a low around 64. West wind 8 to 10 mph. Chance of precipitation is 40%.
Sunny on Friday Friday... Sunny, with a high near 77. Northwest wind 13 to 16 mph, with gusts as high as 29 mph.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 55. West wind 5 to 7 mph.
Mostly Sunny on Saturday Saturday... Mostly sunny, with a high near 80. Light southwest wind increasing to 5 to 9 mph in the morning.
60% chance of thunderstorms Saturday Night Saturday Night... Showers likely, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 61. South wind 6 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
60% chance of thunderstorms Sunday Sunday... Showers likely and possibly a thunderstorm before 9am, then a chance of showers between 9am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 76. Southwest wind around 7 mph becoming west in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
20% chance of thunderstorms Sunday Night Sunday Night... A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 9pm. Partly cloudy, with a low around 54. Northwest wind around 7 mph. Chance of precipitation is 20%.
Sunny on Monday Monday... Sunny, with a high near 70.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 51.
Sunny on Tuesday Tuesday... Sunny, with a high near 77.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 55.
20% chance of thunderstorms Wednesday Wednesday... A slight chance of showers and thunderstorms. Mostly sunny, with a high near 80. Chance of precipitation is 20%.
20% chance of thunderstorms Wednesday Night Wednesday Night... A slight chance of showers and thunderstorms. Partly cloudy, with a low around 61. Chance of precipitation is 20%.
20% chance of rain Thursday Thursday... A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Current Radar Image


Sun Almanac for Alton, Maine
Sunrise: 05:05 AM
Sunset: 8:17 PM
Civil Sunrise:04:29 AM
Civil Sunset: 8:53 PM
Nautical Sunrise: 03:43 AM
Nautical Sunset: 9:39 PM
Astro Sunrise: 02:46 AM
Astro Sunset: 10:36 PM
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