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: Partly sunny, with a high near 69. North wind around 10 mph.
Night: Partly cloudy, with a low around 53. North wind around 5 mph.
Day: Mostly sunny, with a high near 73. Northwest wind 5 to 10 mph.
Night: Mostly clear, with a low around 53. West wind 0 to 5 mph.
Day: Sunny, with a high near 80. West wind around 5 mph.
Night: Mostly clear, with a low around 56. Southwest wind 0 to 5 mph.
Day: Sunny, with a high near 82. Southwest wind 5 to 10 mph.
Night: Mostly clear, with a low around 55. Northwest wind 0 to 5 mph.
Day: Sunny, with a high near 80.
Night: Mostly clear, with a low around 56.
Day: Sunny. High near 81, with temperatures falling to around 76 in the afternoon.
Night: Partly cloudy, with a low around 57.
Day: Mostly sunny, with a high near 79.
Night: Partly cloudy, with a low around 57.
Tue's High Temperature
108 at 16 Miles Southwest Of Tecopa, CA and Death Valley, CA
Wed's Low Temperature
19 at 14 Miles West-southwest Of Mackay, ID