Weather Alert
St Mary's County Weather Warning NWS WEATHER ALERT FOR THE ST MARYS COUNTY, MD AREA - Issued: 1139 AM EDT Thu Sep 3 2026 St Mary's County Weather Warning

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St Mary's County, MD Weather - Hour by Hour Forecast

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St Mary's County, MD Weather - Hour by Hour Forecast

24 Hour Forecast

Current Conditions - Mostly Cloudy. Temperature is 85°F30°C, dew point 80°F27°C, humidity 84%. Wind direction is WSW at 6 mph10 km/h with visibility of 10 mi16 km. Barometric pressure is 30.05 in1018 mb.
Today - Mostly sunny. Isolated showers and thunderstorms this afternoon. Highs in the lower 90s. Southwest winds around 5 mph. Chance of r.. Full Forecast
Tonight - Mostly cloudy with scattered showers with isolated thunderstorms in the evening, then partly cloudy with isolated showers and thun.. Full Forecast

St Mary's County Hourly Weather

24 Hour Forecast Scroll
Thu, Sep 03
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St Mary's County, MD Hourly Weather - Partly Cloudy - 12:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 1:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 2:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 3:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 4:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 5:00 PM St Mary's County, MD Hourly Weather - Partly Cloudy - 6:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 7:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 8:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 9:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 10:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 11:00 PM St Mary's County, MD Hourly Weather - Mostly Cloudy - 12:00 AM St Mary's County, MD Hourly Weather - Mostly Cloudy - 1:00 AM St Mary's County, MD Hourly Weather - Mostly Cloudy - 2:00 AM St Mary's County, MD Hourly Weather - Mostly Cloudy - 3:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 4:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 5:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 6:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 7:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 8:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 9:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 10:00 AM St Mary's County, MD Hourly Weather - Partly Cloudy - 11:00 AM
Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Mostly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy Partly Cloudy
88°F31°C 90°F32°C 92°F33°C 92°F33°C 92°F33°C 92°F33°C 89°F32°C 85°F29°C 82°F28°C 80°F27°C 79°F26°C 77°F25°C 77°F25°C 76°F24°C 76°F24°C 75°F24°C 75°F24°C 74°F23°C 75°F24°C 77°F25°C 78°F26°C 81°F27°C 83°F28°C 86°F30°C
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0% 0% 0% 14% 14% 14% 14% 14% 14% 40% 40% 40% 40% 40% 40% 20% 20% 20% 20% 20% 20% 0% 0% 0%
74°F23°C 74°F23°C 73°F23°C 73°F23°C 72°F22°C 72°F22°C 72°F22°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 73°F23°C 72°F22°C 72°F22°C 73°F23°C 73°F23°C 74°F23°C 74°F23°C 73°F23°C 73°F23°C
63% 60% 54% 54% 52% 52% 57% 67% 74% 79% 82% 88% 88% 90% 90% 94% 90% 93% 94% 88% 88% 79% 72% 65%
SSW SSW SSW SSW SW SW SW SSE S SSE SSE SW SW SW SW SW SSW SSW SSW SSW SSW SSW W W
5 mph 4 mph 4 mph 4 mph 4 mph 4 mph 4 mph 2 mph 2 mph 2 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 3 mph 5 mph 5 mph
10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 6 mi10 km 6 mi10 km 5 mi8 km 6 mi10 km 6 mi10 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km 10 mi16 km
Hour (EDT)
Weather
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POP = Probability of Precipitation. ** Indicates missing data/values from K2W6 model statistics.

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Prob Precip % = Probability of Precipitation.

St Mary's County 36 Hour Forecast

POP = Probability of Precipitation. ** Indicates missing data/values from model statistics.

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