October 20 is generally a great time to visit Chicago. While there is a slight chance of rain (22%), showers are usually brief. Expect comfortable 15°C weather. Expect a bustling atmosphere in Chicago right now—this is when the city truly comes alive with visitors.
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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 October 20
"Mild & Comfortable. Expect average highs of 15°C. 22% chance of rain."
What to Wear in Chicago in October
Based on historical data for October 20, Chicago typically experiences temperatures between 7.9°C and 15°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (22% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Chicago
Smart Suitcase
- Light Jacket
- Long Pants
Average High
15°C
Daytime Peak
Average Low
7.9°C
Nighttime Low
Feels Like
15°C
🌤️ Feels accurate
Rain Chance
22%
Avg 1.1mm if it rains
Cloud Cover
53%
Overcast
Pressure
1015.4 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 75% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 57 min to burn
Type III-IV
🟡 86 min to burn
Type V-VI
🟢 143 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
9.1°C
Dry air
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in United States
Flight Traffic
High
89/100 pressure index
Health Advisory
Healthy
Routine only • View Details →
Landing Slots
~1,222
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Chicago
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:09
☀️ Noon
11:36
🌇 Sunset
17:03
⏱️ Daylight
10h 53m
Wind Speed
23.6 km/h
Moderate wind
Sunshine
7.6 hrs
Direct Sun (Cloud-free)
Humidity
68%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Chicago
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Chicago
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
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 October 20 averages 15°C with a 22% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— 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 (October 20) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Chicago Worth Visiting on October 20?
Planning a trip to Chicago on October 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 15°C with a 22% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,222 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest October 20 recorded in the last 30 years saw temperatures hit 23.7°C in 2024, while the coldest dropped to 0.5°C in 2022.