Potomac River - Hollis Marsh Weather Forecast
- 77
- 88
Partly Sunny
- 72
- 81
Partly Sunny
- 72
- 79
Mostly Sunny
- 72
- 80
Mostly Sunny
- 76
- 84
Mostly Sunny
- 80
- 90
Mostly Sunny
Today 20 Jul Westmoreland
Partly sunny. Humid with Highs in the lower 90s. West Winds 5 to 10 Mph. Heat index Values up to 102.
Tonight 20 Jul Westmoreland
Partly cloudy with a slight chance of Showers and Thunderstorms. Humid with Lows in the mid 70s. Northwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 102 early in the evening.
Potomac River - Hollis Marsh Temperature Statistics
July Temperature
St Marys County Airport (14.9 miles)
Lowest 5 July, 2025
62.6 °FAverage July
78 °FHighest 1 July, 2025
91.4 °F
Climate (2020–Present)
St Marys County Airport (14.9 miles)
Average Low 2020–2025
49.6 °FAverage 2020–2025
58.1 °FAverage High 2020–2025
66.8 °F