❮
Today Hourly 7 days 30 days September
❯

September 2026 Weather | Allentown, Pennsylvania

Tue 9/1
Cloudy Weather
Day 77°
Night 61°
55
Wed 9/2
Rainy Weather
Day 79°
Night 61°
62
Thu 9/3
Rainy Weather
Day 75°
Night 59°
57
Fri 9/4
Cloudy Weather
Day 79°
Night 57°
1
Sat 9/5
Cloudy Weather
Day 79°
Night 59°
0
Sun 9/6
Cloudy Weather
Day 73°
Night 55°
20
Mon 9/7
Cloudy Weather
Day 81°
Night 61°
10
Tue 9/8
Cloudy Weather
Day 79°
Night 57°
20
Wed 9/9
Cloudy Weather
Day 79°
Night 63°
Thu 9/10
Cloudy Weather
Day 79°
Night 61°
Fri 9/11
Sunny Weather
Day 75°
Night 57°
Sat 9/12
Cloudy Weather
Day 77°
Night 61°
Sun 9/13
Cloudy Weather
Day 81°
Night 57°
Mon 9/14
Sunny Weather
Day 73°
Night 54°
Tue 9/15
Sunny Weather
Day 75°
Night 55°
Wed 9/16
Cloudy Weather
Day 79°
Night 57°
Thu 9/17
Cloudy Weather
Day 75°
Night 59°
Fri 9/18
Cloudy Weather
Day 81°
Night 55°
Sat 9/19
Cloudy Weather
Day 75°
Night 52°
Sun 9/20
Cloudy Weather
Day 72°
Night 50°
Mon 9/21
Cloudy Weather
Day 73°
Night 57°
Tue 9/22
Sunny Weather
Day 79°
Night 57°
Wed 9/23
Cloudy Weather
Day 79°
Night 55°
Thu 9/24
Cloudy Weather
Day 73°
Night 50°
Fri 9/25
Cloudy Weather
Day 70°
Night 52°
Sat 9/26
Sunny Weather
Day 70°
Night 48°
Sun 9/27
Sunny Weather
Day 68°
Night 46°
Mon 9/28
Sunny Weather
Day 68°
Night 48°
Tue 9/29
Sunny Weather
Day 70°
Night 46°
Wed 9/30
Cloudy Weather
Day 70°
Night 48°

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