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Grantville, New York Weather Forecast
Grantville, New York Weather
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Weather Forecast for Grantville, New York : St. Lawrence County
Issued: 5:47 am EST Dec 16, 2025 Latitude: 44.859496 Longitude: -74.9210326 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Wednesday Thursday Friday Saturday Sunday Monday
Cloudy on This Afternoon 20% chance of freezing rain on Tonight 30% chance of freezing rain & snow on Wednesday Partly Sunny on Thursday 80% chance of rain & snow on Friday 40% chance of snow on Saturday Mostly Cloudy on Sunday Partly Sunny on Monday
High: 28°F Low: 23°F High: 36°F High: 42°F High: 40°F High: 28°F High: 30°F High: 22°F
Low: 19°F Low: 36°F Low: 9 °F Low: 18°F Low: 9 °F  
Cloudy Freezing Rain Freezing Rain & Snow Partly Sunny Rain & Snow Snow Mostly Cloudy Partly Sunny
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Current Conditions at
MASSENA - (KMSS)
27°
Feels like 13°F
Cloudy
as of 12:53 PM EST
Rel. Humidity: 68%
Dew Point: 18°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
17 MPH
210° Southwest
Cloud Level(s): Scattered at 2500ft, Solid Overcast at 4000ft
Current Conditions at
SARANAC LAKE - (KSLK)
21°
Feels like 10°F
Cloudy
as of 12:51 PM EST
Rel. Humidity: 79%
Dew Point: 16°F
Visibility: 8 Miles
Pressure: 29.97 in.
Flight Rule: MVFR
Wind Data
9 MPH
220° Southwest
Cloud Level(s): Solid Overcast at 1500ft
Current Conditions at
FORT DRUM - (KGTB)
25°
Feels like 12°F
Cloudy
as of 12:55 PM EST
Rel. Humidity: 68%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.02 in.
Flight Rule: MVFR
Wind Data
15 MPH
200° South
Cloud Level(s): Broken at 1700ft, Solid Overcast at 2300ft
Current Conditions at
PLATTSBURGH AFB - (KPBG)
32°
Clear
as of 12:53 PM EST
Rel. Humidity: 50%
Dew Point: 16°F
Visibility: 10 Miles
Pressure: 30.05 in.
Flight Rule: VFR
Wind Data
5 MPH
Cloud Level(s): Clear
Cloudy on This Afternoon This Afternoon... Cloudy, with a high near 28. Southwest wind around 10 mph, with gusts as high as 20 mph.

20% chance of freezing rain Tonight Tonight... A slight chance of freezing rain and sleet between 3am and 5am. Mostly cloudy, with a low around 23. Southwest wind 10 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 20%.

30% chance of freezing rain & snow Wednesday Wednesday... A chance of snow, freezing rain, and sleet before 10am, then a chance of snow between 10am and 1pm, then a chance of rain and snow after 1pm. Mostly cloudy, with a high near 36. Southwest wind 14 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow and sleet accumulation expected.

Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 19. West wind 5 to 9 mph becoming light and variable.

Partly Sunny on Thursday Thursday... Partly sunny, with a high near 42. South wind 6 to 15 mph, with gusts as high as 28 mph.

100% chance of rain Thursday Night Thursday Night... Rain, mainly after 7pm. Low around 36. South wind around 18 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

80% chance of rain & snow Friday Friday... Rain before 11am, then rain and snow showers between 11am and noon, then snow showers after noon. High near 40. Southwest wind 16 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 9. West wind 7 to 15 mph.

40% chance of snow Saturday Saturday... A 40 percent chance of snow after 1pm. Partly sunny, with a high near 28. West wind 6 to 9 mph becoming south in the afternoon.

40% chance of snow Saturday Night Saturday Night... A 40 percent chance of snow. Cloudy, with a low around 18. Southeast wind 9 to 13 mph becoming southwest after midnight.

Mostly Cloudy on Sunday Sunday... Mostly cloudy, with a high near 30. West wind 10 to 13 mph.

Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 9. West wind around 7 mph.

Partly Sunny on Monday Monday... Partly sunny, with a high near 22. West wind 6 to 8 mph.

Current Radar Image


Sun Almanac for Grantville, New York
Sunrise: 07:32 AM
Sunset: 4:19 PM
Civil Sunrise:06:58 AM
Civil Sunset: 4:53 PM
Nautical Sunrise: 06:21 AM
Nautical Sunset: 5:30 PM
Astro Sunrise: 05:45 AM
Astro Sunset: 6:06 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.