Grantville, New York Weather
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Weather Forecast for Grantville, New York : St. Lawrence County
Issued: 6:21 am EDT Sep 14, 2025 Latitude: 44.859496 Longitude: -74.9210326 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
Mostly Sunny on Today Cloudy on Tonight Mostly Cloudy on Monday Sunny on Tuesday Mostly Sunny on Wednesday Mostly Sunny on Thursday Mostly Sunny on Friday Sunny on Saturday
High: 75°F Low: 48°F High: 75°F High: 79°F High: 81°F High: 82°F High: 76°F High: 65°F
Low: 47°F Low: 50°F Low: 54°F Low: 55°F Low: 45°F  
Mostly Sunny Cloudy Mostly Cloudy Sunny Mostly Sunny Mostly Sunny Mostly Sunny Sunny
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Current Conditions at
MASSENA - (KMSS)
57°
Mostly Cloudy
as of 7:53 AM EDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 8 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
3 MPH
240° Southwest
Cloud Level(s): Broken at 6000ft, Broken at 12000ft
Current Conditions at
SARANAC LAKE - (KSLK)
55°
Cloudy
as of 7:51 AM EDST
Rel. Humidity: 93%
Dew Point: 54°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: IFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 500ft
Current Conditions at
FORT DRUM - (KGTB)
63°
Cloudy
as of 7:55 AM EDST
Rel. Humidity: 88%
Dew Point: 59°F
Visibility: 10 Miles
Pressure: 30.03 in.
Flight Rule: VFR
Wind Data
3 MPH
250° West
Cloud Level(s): Scattered at 4900ft, Broken at 6500ft, Solid Overcast at 9500ft
Current Conditions at
PLATTSBURGH AFB - (KPBG)
57°
Cloudy
as of 7:53 AM EDST
Rel. Humidity: 93%
Dew Point: 55°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Solid Overcast at 12000ft
Mostly Sunny on Today Today... Mostly sunny, with a high near 75. Calm wind becoming northwest around 6 mph in the afternoon.
Cloudy on Tonight Tonight... Partly cloudy, with a low around 48. Calm wind.
Mostly Cloudy on Monday Monday... Mostly cloudy, then gradually becoming sunny, with a high near 75. Calm wind becoming northeast around 5 mph in the afternoon.
Mostly Clear on Monday Night Monday Night... Mostly clear, with a low around 47. Calm wind.
Sunny on Tuesday Tuesday... Sunny, with a high near 79. Calm wind.
Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 50. Calm wind.
Mostly Sunny on Wednesday Wednesday... Mostly sunny, with a high near 81. Calm wind.
Cloudy on Wednesday Night Wednesday Night... Partly cloudy, with a low around 54. Calm wind.
Mostly Sunny on Thursday Thursday... Mostly sunny, with a high near 82. West wind 3 to 6 mph.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 55. Southwest wind 3 to 5 mph.
Mostly Sunny on Friday Friday... Mostly sunny, with a high near 76. Northwest wind 6 to 8 mph.
Cloudy on Friday Night Friday Night... Partly cloudy, with a low around 45. North wind around 6 mph.
Sunny on Saturday Saturday... Sunny, with a high near 65. Northeast wind 6 to 8 mph.
Current Radar Image


Sun Almanac for Grantville, New York
Sunrise: 06:38 AM
Sunset: 7:12 PM
Civil Sunrise:06:08 AM
Civil Sunset: 7:42 PM
Nautical Sunrise: 05:34 AM
Nautical Sunset: 8:17 PM
Astro Sunrise: 04:58 AM
Astro Sunset: 8:53 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.