BOISE — Southwest Idaho is about a week into fall, but except for a day here and there, sweaters have stayed in dresser drawers and pumpkin spice lattes largely have been of the iced variety.
“We’ve been about 10 to 15 degrees warmer than normal in the Treasure Valley,” David Groenert, meteorologist at the National Weather Service office in Boise, told the Idaho Press on Thursday morning. “Even though the temperatures are above average, I wouldn’t say that means they’re out of the ordinary. We typically see a high-pressure ridge settle in as we transition from summer into fall, and it can get pretty warm this time of year.”
The average first freeze date in Boise — or the first time each year that the temperature reaches or falls below 32 degrees — is Oct. 17, according to NWS data…