September 1 is statistically one of the best days of the year in Chicago. With minimal rain risk (14%) and pleasant highs of 25°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Chicago right now—this is when the city truly comes alive with visitors. Note: September 1 is Labour Day in Chicago, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Chicago
Currency
USD
$ United States dollar
Language
English
Driving
Right side
Connect
The first Internet café in the United St...
Safety
Moderate Safety
GPI: 2.44
Chicago Weather Forecast for September 1
"Warm & Sunny. Expect average highs of 25.1°C. 14% chance of rain."
What to Wear in Chicago in September
Based on historical data for September 1, Chicago typically experiences temperatures between 18.5°C and 25.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (14% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Chicago
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
25.1°C
Daytime Peak
Average Low
18.5°C
Nighttime Low
Feels Like
25.9°C
☀️ Feels accurate
Rain Chance
14%
Avg 0.7mm if it rains
Cloud Cover
42%
Overcast
Pressure
1017.1 hPa
Medium volatility
Chicago Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 86% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 25 min to burn
Type III-IV
🟡 38 min to burn
Type V-VI
🟢 63 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
19.5°C
Noticeable
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Morning hours (before 11 AM)
Travel & Logistics Insights
Local Calendar
Holiday
Labour Day
Flight Traffic
High
96/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~1,314
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Chicago
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:17
☀️ Noon
11:52
🌇 Sunset
18:26
⏱️ Daylight
13h 8m
Wind Speed
18.7 km/h
Gentle breeze
Sunshine
10.8 hrs
Direct Sun (Cloud-free)
Humidity
71%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Chicago
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Chicago
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Chicago on September 1 averages 25.1°C with a 14% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Chicago Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 1) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Chicago Worth Visiting on September 1?
Planning a trip to Chicago on September 1? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 25.1°C with a 14% historical precipitation risk.
🎉 Local Event: The date coincides with Labour Day, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 1,314 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest September 1 recorded in the last 30 years saw temperatures hit 30.4°C in 2022, while the coldest dropped to 13.4°C in 2017.