Boise Weather This Weekend — What to Do When It's 90°F

Boise looks like 90°F this weekend — a solid window for hiking. Here's the forecast and what to do with it.

If you're deciding on Boise for 2026-08-22 – 2026-08-23, start with the numbers, then the plan.

What's the weekend looking like in Boise?

Treat the numbers as the story for Boise: temperature band and rain risk, then decide if the trip is on.

Boise, Idaho is looking at a 90°F high and 63°F low this weekend, with only light rain on the books (~0.07 in).

What matters isn’t whether Boise is famous — it’s whether 2026-08-22 – 2026-08-23 supports the outdoor time you want (trail-friendly highs).

Bottom line: go to Boise if this forecast matches the weekend you want; skip it if it doesn’t.

Zoo Boise (4.2): A wide array of animal exhibits, with an African boat ride, kids' farm, butterfly area & food/drink.
Wahooz Family Fun Zone (4.4): Spacious entertainment center features go-karts, mini-golf, arcade games & more, plus food & drink.
Julia Davis Park (4.7): Large city park offers sports courts, a rose garden, playground & duck pond, with a zoo & 3 museums.

Weather checklist3

Evening temperatures can drop from about 90°F to 63°F after sunset — pack a layer.
Daytime highs near 90°F — prioritize sun protection, breathable clothes, and water.
Strong sun is likely this week — SPF 30+ (SPF 50+ if you burn easily) is recommended.

If the forecast holds, Boise at about 90°F is worth planning around — use the local picks above to fill the day.

Updated August 18, 2026. Not a substitute for local advisories.