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 after 11am. Partly sunny. High near 86, with temperatures falling to around 81 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Night: A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy. Low around 69, with temperatures rising to around 71 overnight. Southwest wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Day: A chance of showers and thunderstorms before 1pm, then a chance of showers and thunderstorms. Partly sunny. High near 83, with temperatures falling to around 80 in the afternoon. West wind 5 to 10 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
Night: A chance of showers and thunderstorms before 7pm. Partly cloudy, with a low around 64. Northwest wind 0 to 5 mph. Chance of precipitation is 50%.
Day: Sunny, with a high near 84. North wind around 5 mph.
Night: Mostly clear, with a low around 62. North wind 0 to 5 mph.
Day: Sunny, with a high near 85. North wind around 5 mph.
Night: Mostly clear, with a low around 61. North wind around 5 mph.
Day: Sunny, with a high near 87. North wind around 5 mph.
Night: Mostly clear, with a low around 62. Northeast wind 0 to 5 mph.
Day: Sunny, with a high near 88. Northeast wind around 5 mph.
Night: Mostly clear, with a low around 64. Northeast wind 0 to 5 mph.
Day: Sunny, with a high near 87. Northeast wind around 5 mph.
Night: Mostly clear, with a low around 65. Northeast wind 0 to 5 mph.
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