Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

McCook Halloween Climatology

Period of Record 112 Years: 1909-2023

Missing: 1910, 1917 and 1971

Temperature Information

*Record High*	88°F (1968)
*Record Low*	14°F (1991)
*Coldest High Temperature*	21°F (1991)
*Warmest Low Temperature*	50°F (1933)
Average High (Period of Record)	60°F
Average Low (Period of Record)	31.4°F
30 year Normal High (1992-2023)	61.6°F
30 year Normal Low (1992-2023)	32.3°F

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Distribution of High Temperatures in 10 Degree Fahrenheit Ranges

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Distribution of Low Temperatures in 10 Degree Fahrenheit Ranges

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Precipitation Information

*Greatest Precipitation*	1.30” (1920)
*Greatest Snowfall*	4.0” (1991)
*Precipitation*	17 of 112 years 13.3%
Measurable Precipitation (more than a Trace)	12 of 112 years 10.7%
*Snowfall*	6 of 112 years 5.3%
Measurable Snowfall (more than a Trace)	5 of 112 years 4.4%
*Greatest Snow Depth*	5” (2002)
“White” Halloween (Snow Depth of 1” or more)	5 of 112 years 4.4%