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, with a low around 62. South wind around 3 mph.
Day: A chance of rain showers after 1pm. Partly sunny. High near 77, with temperatures falling to around 71 in the afternoon. Northwest wind 3 to 12 mph. Chance of precipitation is 40%.
Night: A chance of rain showers. Mostly cloudy, with a low around 53. Northwest wind 2 to 8 mph. Chance of precipitation is 50%.
Day: A chance of rain showers before 7am. Sunny, with a high near 78. Northwest wind 2 to 6 mph. Chance of precipitation is 50%.
Night: Mostly clear, with a low around 51. West wind around 5 mph.
Day: Sunny, with a high near 78.
Night: Clear, with a low around 46.
Day: Sunny, with a high near 80.
Night: Mostly clear, with a low around 50.
Day: Sunny, with a high near 85.
Night: Mostly clear, with a low around 54.
Day: Sunny, with a high near 89.
Night: Mostly clear, with a low around 60.
Day: Sunny, with a high near 92.
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