Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will build across the Southwest U.S. through the end of the week with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Severe thunderstorms are expected across parts of the central and southern High Plains, central Great Lakes, and Ozarks Wednesday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

61°F

16°C

Humidity	NA
Wind Speed	Calm
Barometer	30.11 in (1020.7 mb)
Dewpoint	N/A
Visibility	10.00 mi
Last update	26 Aug 6:56 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Olney MD

Today
High: 85 °F
Increasing
Clouds
Tonight
Low: 69 °F
Mostly Cloudy
Thursday
High: 87 °F
Slight Chance
T-storms then
Severe
Thunderstorms
Thursday Night
Low: 66 °F
Severe
Thunderstorms
then Chance
Showers
Friday
High: 83 °F
Partly Sunny
then Chance
Showers
Friday Night
Low: 66 °F
Chance
Showers
Saturday
High: 82 °F
Partly Sunny
Saturday Night
Low: 66 °F
Partly Cloudy
Sunday
High: 85 °F
Mostly Sunny

Detailed Forecast

Today

Increasing clouds, with a high near 85. Calm wind becoming south 5 to 8 mph in the afternoon.

Tonight

Mostly cloudy, with a low around 69. South wind 6 to 8 mph.

Thursday

A chance of showers and thunderstorms, mainly after noon. Some of the storms could be severe. Partly sunny, with a high near 87. South wind 6 to 9 mph. Chance of precipitation is 50%.

Thursday Night

Showers and thunderstorms likely, mainly before 8pm. Some of the storms could be severe. Mostly cloudy, with a low around 66. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Friday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 83. Light north wind. Chance of precipitation is 30%.

Friday Night

A chance of showers and thunderstorms before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

Saturday

Partly sunny, with a high near 82.

Saturday Night

Partly cloudy, with a low around 66.

Sunday

Mostly sunny, with a high near 85.

Sunday Night

Mostly clear, with a low around 69.

Monday

Sunny, with a high near 90.

Monday Night

Partly cloudy, with a low around 72.