High pressure over the Four Corners region is expanding northward into Idaho, maintaining clear skies and bringing much warmer air into the region. The hottest temps of the year, so far, are in store to kick off next week.

In the meantime, tonight is another relatively cool and comfortable night.  Valley temps will range from 54-59°.  If sleeping with the window open at night is something you enjoy, tonight is a nice night to do so.  As the heat amplifies into next week, even our morning lows will be on the warm side.

Tomorrow is much warmer than today, with highs in the mid to upper 90s.  We'll likely get the first triple-digit day of the year for Boise on Monday.   The last time Boise had 100°+ was August 11th, 2018, when it was 104°. 

With all of the heat pumping in from the south, some monsoonal moisture will also be moving in.  This could trigger isolated afternoon thunderstorms for Sunday, Monday and Tuesday.  However, with the extreme heat, little rainfall is expected, but there may be some gusty downburst winds.

Tuesday will remain hot, close to 100 degrees, with partly cloudy skies, followed by a slight cool down to near-normal temperatures in the mid 90's for Wednesday.  That's a brief "cool down," back to average highs though.  Looking at the rest of July, it appears that above-normal temperatures will be sticking around.

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  • Idaho's Chief Meteorologist Rick Lantz began his broadcasting career in 1975 working in both radio and television in Weiser, Caldwell, Nampa, and Boise. He has been bringing you the weather each weeknight for over 30 years on KTVB.
  • Meteorologist Larry Gebert began his broadcasting career in 1977 working for a radio station while he was completing his degree. He began working in television the following year in Montana before moving to Boise in 1983. Larry has been with KTVB since 1992 working as a meteorologist.
  • Meteorologist Bri Eggers joined the KTVB weather team in the fall of 2018. She became a meteorologist while working here in the Treasure Valley, and has earned her National Weather Association seal of approval. After spending four years in Boston, forecasting blizzards, nor’easters and humid summer days, Bri is excited to dive back into mountain meteorology. 
  • Meteorologist Jim Duthie has been a part of KTVB's weather team since August of 2008, but it's not his first experience with Idaho weather. Jim began forecasting on television in the Treasure Valley in 1998. Prior to coming to Idaho, he had extensive weather forecasting experience both in the private sector and in broadcasting.