Following Oklahoma's second-coldest April, the state had its hottest May.
Oklahoma's statewide average temperature for May was 74.6 degrees, breaking the previous record of 74 degrees set in 1962, according to state Climatologist Gary McManus. Data dates to 1895.
"The jet stream retreated to the north a little bit earlier than it usually does, that's what usually happens during the summer months, McManus said Friday. "That left us south of the jet stream to bake in the heat."