Heat Persists in the South Central U.S. and Southwest; Heavy rains in the Desert Southwest and Central Plains

Sweltering heat remains across the South-Central Plains, Lower/Middle Mississippi Valley, and the Southwest this week with limited nighttime relief. Thunderstorms will bring heavy rainfall leading to localized flash flooding in portions of the Desert Southwest and central Plains. Isolated strong to severe thunderstorms are possible across portions of the central Plains into the Northeast. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

65°F

18°C

Humidity	90%
Wind Speed	S 5 mph
Barometer	30.25 in (1025.4 mb)
Dewpoint	62°F (17°C)
Visibility	10.00 mi
Last update	9 Sep 6:56 am EDT

More Information:

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

Extended Forecast for

Rockville MD

Today
High: 87 °F
Mostly Sunny
Tonight
Low: 71 °F
Mostly Clear
Thursday
High: 86 °F
Mostly Sunny
then Chance
T-storms
Thursday Night
Low: 66 °F
Showers
Friday
High: 81 °F
Mostly Sunny
Friday Night
Low: 65 °F
Mostly Cloudy
Saturday
High: 80 °F
Showers
Likely
Saturday Night
Low: 68 °F
Showers
Likely
Sunday
High: 82 °F
Mostly Cloudy
then Slight
Chance
T-storms

Detailed Forecast

Today

Mostly sunny, with a high near 87. Southwest wind 5 to 10 mph.

Tonight

Mostly clear, with a low around 71. South wind around 9 mph, with gusts as high as 20 mph.

Thursday

A chance of showers and thunderstorms, mainly after 5pm. Mostly sunny, with a high near 86. West wind 5 to 8 mph. Chance of precipitation is 30%.

Thursday Night

Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am. Low around 66. Northwest wind 3 to 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday

Mostly sunny, with a high near 81. North wind 3 to 6 mph.

Friday Night

Mostly cloudy, with a low around 65.

Saturday

A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 60%.

Saturday Night

Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

Sunday

A slight chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 20%.

Sunday Night

Partly cloudy, with a low around 68.

Monday

Mostly sunny, with a high near 85.

Monday Night

Partly cloudy, with a low around 68.

Tuesday

Mostly sunny, with a high near 86.