❮
Today Hourly 7 days 30 days September
❯

September 2026 Weather | Boise, Idaho

Today 9/1
Cloudy Weather
Day 82°
Night 59°
25
Wed 9/2
Cloudy Weather
Day 79°
Night 55°
7
Thu 9/3
Partly Sunny with Showers
Day 73°
Night 52°
80
Fri 9/4
Partly Sunny with Showers
Day 73°
Night 52°
80
Sat 9/5
Cloudy Weather
Day 79°
Night 54°
55
Sun 9/6
Cloudy Weather
Day 79°
Night 59°
55
Mon 9/7
Sunny Weather
Day 79°
Night 57°
18
Tue 9/8
Sunny Weather
Day 81°
Night 57°
2
Wed 9/9
Sunny Weather
Day 79°
Night 55°
1
Thu 9/10
Rainy Weather
Day 79°
Night 59°
75
Fri 9/11
Sunny Weather
Day 84°
Night 57°
0
Sat 9/12
Sunny Weather
Day 84°
Night 59°
0
Sun 9/13
Sunny Weather
Day 81°
Night 57°
0
Mon 9/14
Sunny Weather
Day 81°
Night 54°
20
Tue 9/15
Sunny Weather
Day 88°
Night 61°
20
Wed 9/16
Sunny Weather
Day 86°
Night 57°
Thu 9/17
Sunny Weather
Day 73°
Night 48°
Fri 9/18
Sunny Weather
Day 73°
Night 48°
Sat 9/19
Sunny Weather
Day 81°
Night 55°
Sun 9/20
Sunny Weather
Day 81°
Night 57°
Mon 9/21
Sunny Weather
Day 72°
Night 50°
Tue 9/22
Cloudy Weather
Day 79°
Night 55°
Wed 9/23
Sunny Weather
Day 82°
Night 57°
Thu 9/24
Rainy Weather
Day 79°
Night 50°
Fri 9/25
Cloudy Weather
Day 66°
Night 45°
Sat 9/26
Cloudy Weather
Day 70°
Night 55°
Sun 9/27
Cloudy Weather
Day 75°
Night 52°
Mon 9/28
Cloudy Weather
Day 68°
Night 45°
Tue 9/29
Sunny Weather
Day 66°
Night 45°
Wed 9/30
Cloudy Weather
Day 73°
Night 50°

Explore U.S. Weather Trends

❄️ Coldest Cities in the U.S. – Live Temperature Rankings 🔥 Hottest Cities Today – Real-Time Heat Observations ⚠️ Active Weather Alerts – Warnings, Watches & Advisories 🌪️ Windiest Cities – Highest Sustained Wind Speeds 🌫️ Worst Air Quality – Cities with the Highest AQI 🍃 Best Air Quality – Cities with the Lowest AQI