October 31 is generally a great time to visit Chicago. While there is a slight chance of rain (21%), showers are usually brief. Expect comfortable 12°C weather. Chicago is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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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 31
"Mild & Comfortable. Expect average highs of 11.8°C. 21% chance of snow."
What to Wear in Chicago in October
Based on historical data for October 31, Chicago typically experiences temperatures between 5.6°C and 11.8°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (21% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Chicago
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
11.8°C
Daytime Peak
Average Low
5.6°C
Nighttime Low
Feels Like
10.2°C
🌤️ Minor difference
Snow Chance
21%
Avg 1.4mm if it snows
Snowfall
0.1 cm
~21% chance
Pressure
1017.7 hPa
Medium volatility
Chicago Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
❓ Expect variable conditions. Have flexible plans and pack for multiple weather scenarios.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 62 min to burn
Type III-IV
🟡 93 min to burn
Type V-VI
🟢 155 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
6.9°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
06:22
☀️ Noon
11:35
🌇 Sunset
16:47
⏱️ Daylight
10h 25m
Wind Speed
25.7 km/h
Moderate wind
Sunshine
6.7 hrs
Direct Sun (Cloud-free)
Humidity
72%
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
💰💰 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 31 averages 11.8°C with a 21% precipitation probability. Wedding/Outdoor Event Score: 73/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
October 24
13.9°C • 28% rain
Score
85
October 25
13.5°C • 31% rain
Score
80
October 26
12.8°C • 28% rain
Score
79
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 31) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Chicago Worth Visiting on October 31?
Planning a trip to Chicago on October 31? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 11.8°C with a 21% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,222 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest October 31 recorded in the last 30 years saw temperatures hit 20.2°C in 2024, while the coldest dropped to -2.6°C in 2019.