1926 - The temperature at Yellowstone Park dipped to nine degrees below zero. It was the coldest reading of record in the U.S. during September. Severe freezes were widespread over the northwestern U.S. causing great crop destruction. In Washington State, Spokane County experienced their earliest snow of record. Harney Branch Experiment Station in Oregon reported a temperature of 2 degrees above zero to establish a state record for the month of September.
More on this and other weather history
Day: Showers and thunderstorms likely between 11am and 3pm, then showers and thunderstorms between 3pm and 4pm, then showers and thunderstorms likely. Partly sunny. High near 94, with temperatures falling to around 87 in the afternoon. Heat index values as high as 102. West wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Night: A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 71. North wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Day: Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny. High near 87, with temperatures falling to around 84 in the afternoon. Northwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Night: A slight chance of showers and thunderstorms before 7pm. Clear, with a low around 66. North wind 5 to 10 mph. Chance of precipitation is 20%.
Day: Sunny, with a high near 89.
Night: Mostly clear, with a low around 65.
Day: Sunny, with a high near 90.
Night: Mostly clear, with a low around 66.
Day: Sunny, with a high near 89.
Night: Mostly clear, with a low around 66.
Day: Mostly sunny, with a high near 89.
Night: Partly cloudy, with a low around 67.
Day: Sunny, with a high near 90.
Tue's High Temperature
108 at 16 Miles Southwest Of Tecopa, CA and Death Valley, CA
Tue's Low Temperature
15 at 14 Miles West-southwest Of Mackay, ID