The Treasure Valley is trending almost 15°F above normal but cooler conditions are set to roll in very soon.
- Near-record warmth continues: Treasure Valley temperatures are running about 15°F above normal, with Boise reaching the low 90s.
- Wind and cooler air arrive Friday: Gusts up to 28 mph will accompany a cold front moving into southern Idaho.
- Fall weather takes over: Highs will drop from the low 90s to the upper 60s by the weekend, with cooler, dry conditions continuing into October.
The third day of Fall brought some Summer like weather to Idaho with mid 80s in most parts of the I-84 corridor and 90's in the Boise region. Skies are nice and clear but that is set to shift soon as a cold front will come in soon and drop us into temperatures normal to this time of year.
Before highlighting the temperatures drop, we also need to highlight windy weather also coming in. Friday into Friday night, gusts could reach up to 28MPH on the valley floors and higher in places like Mountain Home. Winds settle down over the weekend but that wind brings in cooler conditions.
We go from low 90s Thursday to upper 60s with a 25°F drop over 48 hours in daytime highs. Boise will level out into the low 70s but this system will truly bring in Fall weather to southern Idaho. This may be the final day of 2026 that we see 90s so soak it up while it lasts.
Idaho heading into October is trending slightly warmer than normal and very dry as well. This means very comfortable conditions are on the way for the gem state so I would have your outdoor plans ready to go.
Cooler weather moves in soon, clear skies continue over the next week.
