Cities experiencing record temperatures included Reno, Tonopah, Eureka, Ely and Elko.
The National Weather Service says Reno saw an all-time high for the date on Monday, at 94 degrees.
Highs temperatures of 91 degrees in Tonopah and Elko and 90 in Eureka and Ely also were record-breakers.
The previous high for a Sept. 27 in Reno was 93 degrees last year.
Weather service technician Jessica Kielhorn said the same high pressure system gave Los Angeles 113 degrees temperatures on Monday.