October 27 is generally a great time to visit Chicago. While there is a slight chance of rain (27%), showers are usually brief. Expect comfortable 12°C weather. As it's peak season for Chicago, we recommend booking your stay well in advance to secure the best rates.
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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 27
"Mild & Comfortable. Expect average highs of 12.3°C. 27% chance of rain."
What to Wear in Chicago in October
Based on historical data for October 27, Chicago typically experiences temperatures between 6.8°C and 12.3°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. With a 27% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Chicago
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
12.3°C
Daytime Peak
Average Low
6.8°C
Nighttime Low
Feels Like
11.1°C
🌤️ Minor difference
Rain Chance
27%
Avg 1.8mm if it rains
Cloud Cover
62%
Overcast
Pressure
1018.2 hPa
Medium volatility
Chicago Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
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
7.8°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
06:17
☀️ Noon
11:35
🌇 Sunset
16:53
⏱️ Daylight
10h 35m
Wind Speed
22.6 km/h
Moderate wind
Sunshine
6.5 hrs
Direct Sun (Cloud-free)
Humidity
74%
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
⛅ Good
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 27 averages 12.3°C with a 27% precipitation probability. Wedding/Outdoor Event Score: 78/100."
— 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 20
15°C • 22% rain
Score
91
October 21
14.8°C • 23% rain
Score
90
October 22
14.6°C • 23% rain
Score
89
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 27) in other destinations
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Spain
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Italy
London
United Kingdom
Prague
Czech Republic
Amsterdam
Netherlands
🌍 Explore the same date in different destinations around the world
📍 Is Chicago Worth Visiting on October 27?
Planning a trip to Chicago on October 27? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 12.3°C with a 27% historical precipitation risk.
✈️ Travel Logistics: Approximately 1,222 landing slots available daily during this period, indicating peak tourist activity.
📊 Historical Extremes: The hottest October 27 recorded in the last 30 years saw temperatures hit 21.1°C in 2023, while the coldest dropped to 1.3°C in 2020.