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National Weather Service: Casper sees warm, dry June; more rain fell July 1 than last month

A group of children lay down on fresh water at the David Street Station splash pad as temperatures soared past 100 degrees on Tuesday, June 15, 2021 in Casper. (Dan Cepeda, Oil City)

CASPER, Wyo. — Although June’s temperatures were near normal in Casper, it was a much drier than normal month, according to the National Weather Service in Riverton. June was so dry, in fact, that more rain fell in the city on Friday, July 1, than in the entirety of June.

Just 0.21 inches of precipitation were recorded in Casper during June, about 16% of the normal rainfall. On Friday, the weather service recorded 0.29 inches of rain for the day.

While the Riverton weather service office didn’t release an official ranking for Casper, it reported this June as the fourth driest June for Buffalo, third driest for Greybull and Riverton Airport, and tied for driest for Lander. The weather service office in Cheyenne said June was the 12th driest on record for that city. It was also the fourth driest April–May–June period, according to records dating back to 1873.

“Most precipitation came from isolated afternoon thunderstorms due to weak monsoonal moisture flow occasionally through the month,” the Riverton weather service office said. “High pressure dominated through much of the month, keeping most areas much drier than normal.”

(National Weather Service Riverton graphic)

The average daily temperature in Casper was 62.4 degrees, about 0.1 degrees below normal, according to the weather service.

The lack of precipitation throughout the state has led to widespread drought conditions, the weather service reported. About half of Wyoming, mostly in the south, west and east, is seeing persistent drought, according to drought mapping.