Extreme Heat and Tropical Storm Bertha Impacts

Dangerous heat will expand from the Gulf Coast into the Southern Plains and Desert Southwest through week's end. Additional extreme heat impacting the Pacific Northwest will shift to the northern Plains by the weekend. Tropical Storm Bertha is expected to continue to impact portions of the northern Gulf Coast from the western Florida Panhandle to southeastern Louisiana through tonight. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

69°F

21°C

Humidity	61%
Wind Speed	Vrbl 3 mph
Barometer	30.02 in (1017.6 mb)
Dewpoint	55°F (13°C)
Visibility	10.00 mi
Last update	23 Jul 12:56 am EDT

More Information:

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

Extended Forecast for

Olney MD

Overnight
Low: 62 °F
Mostly Cloudy
Thursday
High: 78 °F
Sunny
Thursday Night
Low: 59 °F
Mostly Clear
Friday
High: 79 °F
Mostly Sunny
Friday Night
Low: 62 °F
Partly Cloudy
Saturday
High: 80 °F
Mostly Sunny
Saturday Night
Low: 63 °F
Partly Cloudy
then Slight
Chance
Showers
Sunday
High: 83 °F
Mostly Sunny
then Chance
T-storms
Sunday Night
Low: 66 °F
Chance
T-storms

Detailed Forecast

Overnight

Mostly cloudy, with a low around 62. North wind around 6 mph.

Thursday

Sunny, with a high near 78. North wind 3 to 6 mph.

Thursday Night

Mostly clear, with a low around 59. Calm wind.

Friday

Mostly sunny, with a high near 79. Calm wind becoming east around 6 mph in the afternoon.

Friday Night

Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.

Saturday

Mostly sunny, with a high near 80.

Saturday Night

A slight chance of showers after 2am. Partly cloudy, with a low around 63. Chance of precipitation is 20%.

Sunday

A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 40%.

Sunday Night

A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 66. Chance of precipitation is 30%.

Monday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.

Monday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 67. Chance of precipitation is 40%.

Tuesday

A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 50%.

Tuesday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Chance of precipitation is 40%.

Wednesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 20%.