High temperatures in Boise topped 100 on Friday — the eighth day in a row of triple-digit heat, according to the National Weather Service.
The record for consecutive days of 100 or more was set in 2003 and matched in 2006. Meteorologists believe we’ll again tie that record on Saturday.
“That’s a good bet there,” meteorologist Les Colin said.
But the forecast is showing a high of 98 for Sunday, so breaking the record looks iffy. A modest cooldown — to the mid-90s — is expected to come next week, and we may be down to the low 90s by Friday, meteorologists said.
This year’s hot streak started on June 26, when the high was 101. The highs over the days that followed were 106, 110, 103, 102, 102, 104 and 102.
Triple-digit heat may feel better in some parts of the Valley than others because humidity varies considerably by location. Humidity is higher along the river, in irrigated areas and places with a lot of green vegetation, according to meteorologist Joel Tannenholz.
At about 7 p.m. Saturday, the humidity was 9 percent at the airport. It was 19 percent in Eagle and 30 percent in Garden City, Tannenholz said.
Outflow winds from thunderstorms south of the Boise area on Saturday could increase fire danger during the Valley’s Fourth of July trifecta of heat, low humidity and fireworks.
“We’ll have to track that carefully,” Colin said.
Outdoor burning is prohibited Saturday in Ada and Canyon counties — and all the cities within those counties — due to a yellow air quality alert issued by the Idaho Department of Environmental Quality.
Moderately diminishing air quality could impact sensitive groups, including children, the elderly and those with lung or heart conditions. The public is asked to combine errands and limit driving as much as possible to reduce pollution in the Treasure Valley.