May's high and low temps lead to average month 2016.06.08

By DAVID GREEN

With 12 of the past 13 days in the 80° range, a chilly spring quickly moved into a hot ending last month.

Cooler temperatures earlier in May tempered the warm finish and the average for the month ended right where it’s expected.

“There’s generally some departure from normal,” said Morenci climate observer George Isobar, “and it’s unusual to have right on the average. What am I saying—it’s unusual to have it the usual?”

Isobar recorded a low temperature of 32° on the morning of May 15—one of six morning temperatures in the 30s. The high came in at 87° on May 29 and 30. 

“We had a high temperature of only 51° on the 15th,” Isobar said, “and gave a departure 16° below average.”

On the other side of the scale, temperatures in the upper 80s led to double-digit departures on the warm side from May 26 to 29.

Precipitation was about eight tenths of an inch below normal last month, and most of the three inches recorded fell in the first half of the month.

“We had 20 days with less than a tenth of an inch,” Isobar said. “I was beginning to think a little drought might be underway.”

That came to an end on Saturday when 1.75 inches of rain fell, plus another tenth on Sunday.

JUNE—“We finally had a cool day on Tuesday, but there’s bound to be a return to the summery stuff soon,” Isobar said. “It’s a rare June when we don’t have at least one day on the 90s.”

Rarely, he said, it gets even warmer than that.