Great Mills, Maryland Weather
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Weather Forecast for Great Mills, Maryland : St. Mary's County
Issued: 10:29 pm EDT Jun 17, 2025 Latitude: 38.2367924 Longitude: -76.4971762 View on Google Maps

MouseOver for Detail Forecast
Overnight Wednesday Juneteenth Friday Saturday Sunday Monday Tuesday
20% chance of thunderstorms on Overnight 30% chance of thunderstorms on Wednesday 60% chance of thunderstorms on Juneteenth Sunny on Friday Sunny on Saturday Sunny on Sunday Sunny on Monday Sunny on Tuesday
Low: 72°F High: 92°F High: 94°F High: 85°F High: 88°F High: 92°F High: 94°F High: 95°F
Low: 77°F Low: 69°F Low: 68°F Low: 72°F Low: 75°F Low: 77°F  
Thunderstorms Thunderstorms Thunderstorms Sunny Sunny Sunny Sunny Sunny
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Current Conditions at
PATUXENT RIV NAS - (KNHK)
75°
Cloudy
as of 12:37 AM EDST
Rel. Humidity: 88%
Dew Point: 72°F
Visibility: 7 Miles
Pressure: 29.96 in.
Flight Rule: LIFR
Wind Data
8 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 300ft
Current Conditions at
ST MARYS - (K2W6)
72°
Cloudy
as of 12:39 AM EDST
Rel. Humidity: 100%
Dew Point: 72°F
Visibility: 4 Miles
Pressure: 29.98 in.
Flight Rule: LIFR
Wind Data
3 MPH
130° Southeast
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
ST INIGOES/WEBSTER - (KNUI)
73°
Cloudy
Mist
as of 11:53 PM EDST
Rel. Humidity: 100%
Dew Point: 73°F
Visibility: 6 Miles
Pressure: 29.97 in.
Flight Rule: LIFR
Wind Data
6 MPH
150° Southeast
Cloud Level(s): Solid Overcast at 400ft
Current Conditions at
US NAVAL ACADEMY - (KNAK)
75°
Cloudy
as of 11:54 PM EDST
Rel. Humidity: 88%
Dew Point: 72°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: MVFR
Wind Data
9 MPH
160° South
Cloud Level(s): Solid Overcast at 1100ft
20% chance of thunderstorms Overnight Overnight... A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South wind around 5 mph. Chance of precipitation is 20%.
30% chance of thunderstorms Wednesday Wednesday... A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 92. Heat index values as high as 102. Southwest wind 6 to 11 mph. Chance of precipitation is 30%.
30% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 77. Southwest wind around 6 mph. Chance of precipitation is 30%.
60% chance of thunderstorms Juneteenth Juneteenth... Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 94. Heat index values as high as 102. Southwest wind 8 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
60% chance of thunderstorms Thursday Night Thursday Night... Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 69. West wind 5 to 7 mph. Chance of precipitation is 60%.
Sunny on Friday Friday... Sunny, with a high near 85.
Mostly Clear on Friday Night Friday Night... Mostly clear, with a low around 68.
Sunny on Saturday Saturday... Sunny, with a high near 88.
Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 72.
Sunny on Sunday Sunday... Sunny, with a high near 92.
Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 75.
Sunny on Monday Monday... Sunny, with a high near 94.
Clear on Monday Night Monday Night... Clear, with a low around 77.
Sunny on Tuesday Tuesday... Sunny, with a high near 95.
Current Radar Image


Sun Almanac for Great Mills, Maryland
Sunrise: 05:43 AM
Sunset: 8:32 PM
Civil Sunrise:05:11 AM
Civil Sunset: 9:04 PM
Nautical Sunrise: 04:31 AM
Nautical Sunset: 9:43 PM
Astro Sunrise: 03:46 AM
Astro Sunset: 10:29 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.