No surprise here: This month is shaping up to be another hotter-than-usual June in the Tri-Cities.
The first triple digit-temperature of the year could be recorded Monday, with the high also coming close to 100 degrees Saturday, according to the National Weather Service.
“People will want to get out the sunscreen and fans,” said Nic Loyd, Washington State University meteorologist.
Usual highs for the start of June in the Tri-Cities are about 78 degrees, increasing to 86 degrees by the end of the month. Lows typically increase from 54 degrees to 59 degrees.
A warm ridge of high pressure off the Pacific Ocean will park itself over the region, bringing hot weather this weekend. Daily heat records around the state could be broken Sunday and Monday after the weather gradually warms up Friday and Saturday, Loyd said.
Last month was the third-warmest May on record in the Tri-Cities, as measured in Kennewick, according to the weather service. At Hanford, the month tied for the fifth-warmest May since World War II.
The weather service predicts that June also should be warmer than usual in the Tri-Cities, with precipitation close to the normal of 0.51 inches.
May rain storms helped keep Yakima River Basin flows and reservoirs fairly level through the second half of the month, said Chuck Garner, Yakima Project River Operations supervisor for the Bureau of Reclamation.
The water supply for irrigators with junior water rights remains at an estimated 44 percent. If precipitation and runoff continue to be unfavorable, the Bureau of Reclamation expects the water supply available for junior users to decline further.
May temperatures in the Tri-Cities averaged 66.2 degrees, which was 4.2 degrees above normal. High temperatures averaged 4.6 degrees above normal at 79.1 degrees, with 92 degrees the hottest temperature of the month as recorded the last two days of May in Kennewick.
At Hanford, temperatures averaged 4.4 degrees above normal, according to the Hanford Meteorological Station. The temperature reached 94 degrees on May 29.
One daily temperature record was set at Hanford in May, but not for warm weather. The high May 13 was only 56 degrees, breaking the old record for the coolest high on that date — 57 degrees, set in 1955.
The months of March through May also were warmer than normal at Hanford.
The average temperature at Hanford was 2.2 degrees above normal, according to the Hanford Meteorological Station. Spring precipitation totaled 2.23 inches, which was 136 percent of normal.
In the Tri-Cities, precipitation measured 0.99 inches in May, largely because of 0.93 inches that fell May 13. The rain storm helped precipitation for the month reach 0.35 inches above normal.
Precipitation for the year in the Tri-Cities remained below normal at 3.17 inches through May. Normal is 3.79 inches.
The peak wind gust in Kennewick in May was 37 mph and was recorded the same day as the May 13 rain storm. At the Hanford Meteorological Station, the peak gust was 47 mph on May 24.