1939 - A thunderstorm deluged Washington D.C. with 4.4 inches of rain in two hours. September of that year was very dry across much of the nation, and Washington D.C. received more rain in that two hour period than most other places in the country that entire month.
More on this and other weather history
Night: Mostly clear. Low around 46, with temperatures rising to around 48 overnight. Northwest wind 15 to 25 mph, with gusts as high as 35 mph.
Day: Sunny. High near 65, with temperatures falling to around 63 in the afternoon. Northwest wind 15 to 20 mph, with gusts as high as 35 mph.
Night: Mostly clear, with a low around 39. Northwest wind 5 to 15 mph, with gusts as high as 30 mph.
Day: Sunny. High near 68, with temperatures falling to around 66 in the afternoon. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.
Night: Clear. Low around 39, with temperatures rising to around 41 overnight. East wind 5 to 10 mph, with gusts as high as 20 mph.
Day: Sunny. High near 74, with temperatures falling to around 72 in the afternoon. South wind 5 to 15 mph, with gusts as high as 25 mph.
Night: Mostly clear, with a low around 55. Southeast wind around 15 mph, with gusts as high as 25 mph.
Day: Mostly sunny, with a high near 86. South wind around 15 mph, with gusts as high as 25 mph.
Night: Partly cloudy, with a low around 59.
Day: Sunny, with a high near 89.
Night: Partly cloudy, with a low around 60.
Day: Mostly sunny, with a high near 88.
Night: A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 63.
Day: A slight chance of showers and thunderstorms before 7am. Mostly sunny, with a high near 89.
Thu's High Temperature
112 at Death Valley, CA and 16 Miles Southwest If Tecopa, CA
Thu's Low Temperature
28 at Peter Sinks, UT