Strong high pressure brings several days of above-normal warmth; Boise could reach 89–90°F Sunday — a reading that would challenge the daily record and be the first October 90° since 2015.
High pressure over southwest Idaho will push temperatures 10–15°F above normal for early October, with valley highs in the low to mid-80s today and warming through the weekend.
Boise is forecast at 89°F Sunday with a 40% chance of hitting 90°F, potentially breaking the daily record of 88°F and becoming the first October 90° since 2015.
Model signals suggest a system could approach the Pacific Northwest next weekend and models also hint at possible tropical moisture for the West, but timing and local impacts remain uncertain.
90-degree weather returns in October Weather Actions Facebook Tweet Email 90-degree weather returns in October Prev Next Copyright 2026 Scripps Media, Inc. This material may not be published, broadcast, rewritten, or redistributed. Sophia Cruz Posted and last updated Friday starts off dry and mild across southwest Idaho as high pressure continues to strengthen over the region.
Mostly clear skies are expected Saturday and Sunday as high pressure reaches peak strength. Temperatures will climb a few degrees each day, with Sunday shaping up to be the warmest day of the stretch. Boise is forecast to reach 89 degrees Sunday, which would challenge the daily record high of 88 degrees.
Idaho News 6 Even warmer weather is on the way this weekend. There is also a 40% chance Boise reaches 90 degrees. Idaho News 6 Sophia Cruz's Idaho News 6 Forecast.
4 things to know about the weather: Nice & warm Thursday, Friday Rain returns Friday PM Cool, showery weekend October chill next week From making a run at 90° to the potential for frost, we’re going to be in an active weather pattern over the next five to six days. The warm air comes first as most of the area will see
It's October! I am tracking a nice start to the month with near-average temperatures. But temperatures will be warming back into the triple-digits and low 100s for the weekend. The post Tracking a seasonable start to October with warmer days ahead appeared first on KYMA .
4 things to know about the weather: Dry weather returns Sunny days start Wednesday Nearing 90° by Friday Sunday soaking looks likely High pressure over the Great Lakes will finally shove the weekend nor’easter out to sea. As the storm and its attending cloud deck move out, our weather will improve. Sunshine will still
The normal high on October 1 is 68°F, and by Halloween the normal high temperature drops to 56°F.
Stunning fall weather builds to 87 degrees Thursday in the Treasure Valley before a dramatic cold front drops temperatures to 67 degrees Sunday with mountain showers.
Picture-perfect weather returns to the Treasure Valley with sunny skies and temperatures in the mid-70s to low 80s Tuesday through Thursday after last week's significant rainfall.
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