Heat and Fire Weather Concerns West; Heavy Rain and Thunderstorms from Plains to mid-Atlantic

Thunderstorms and locally heavy rainfall is expected from the Central Plains to the Ohio Valley, mid-Atlantic and across the Southeast. Severe weather from the Upper Midwest to Central Plains increases on Friday. Major to Extreme HeatRisk continues across the Southern Plains to the lower Mississippi Valley late this week. Fire weather concerns for the northern Rockies and northern Plains today. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

78°F

26°C

Humidity	76%
Wind Speed	NW 3 mph
Barometer	29.93 in (1014.4 mb)
Dewpoint	70°F (21°C)
Visibility	7.00 mi
Heat Index	80°F (27°C)
Last update	10 Sep 7:56 pm EDT

More Information:

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

Extended Forecast for

Olney MD

Tonight
Low: 68 °F
Mostly Cloudy
then Showers
Likely
Friday
High: 79 °F
Showers
Likely then
Mostly Cloudy
Friday Night
Low: 65 °F
Mostly Cloudy
Saturday
High: 80 °F
Partly Sunny
then Showers
Likely
Saturday Night
Low: 67 °F
Showers
Sunday
High: 83 °F
Chance
Showers then
Slight Chance
T-storms
Sunday Night
Low: 66 °F
Partly Cloudy
Monday
High: 79 °F
Mostly Sunny
Monday Night
Low: 58 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Friday

Showers likely, mainly before 9am. Mostly cloudy, with a high near 79. North wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

Friday Night

Mostly cloudy, with a low around 65. Calm wind.

Saturday

Showers likely and possibly a thunderstorm, mainly after 5pm. Mostly cloudy, with a high near 80. Southeast wind 5 to 7 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 67. Southeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.

Sunday

A chance of showers before 8am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.

Sunday Night

Partly cloudy, with a low around 66.

Monday

Mostly sunny, with a high near 79.

Monday Night

Partly cloudy, with a low around 58.

Tuesday

Mostly sunny, with a high near 78.

Tuesday Night

Mostly clear, with a low around 62.

Wednesday

Sunny, with a high near 84.