Best Time to Visit Chicago
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
Recommended Months
Based on temperature comfort, low precipitation, and sunshine hours, the best time to visit Chicago is:
July → August → June
July scores 66/100 — the highest-rated month for travel.
Monthly Ratings (0-100)
Scores are weighted: temperature comfort (50%), low precipitation (30%), sunshine (20%). Higher is better.
| Month | Overall Score | Temp Comfort | Precipitation | Sunshine | Bar |
|---|---|---|---|---|---|
| January | 0 | 0 | 0 | 0 | |
| February | 0 | 0 | 0 | 0 | |
| March | 3 | 6 | 0 | 0 | |
| April | 15 | 30 | 0 | 0 | |
| May | 30 | 60 | 0 | 0 | |
| June | 46 | 92 | 0 | 0 | |
| July | 50 | 100 | 0 | 0 | |
| August | 50 | 100 | 0 | 0 | |
| September | 42 | 83 | 0 | 0 | |
| October | 25 | 50 | 0 | 0 | |
| November | 8 | 16 | 0 | 0 | |
| December | 0 | 0 | 0 | 0 |
Monthly Temperature Comfort
| Month | Mean Temp | Comfort Level |
|---|---|---|
| January | -2.6°C (27.3°F) | Cold (Below 0°C) |
| February | -1.9°C (28.6°F) | Cold (Below 0°C) |
| March | 4.2°C (39.6°F) | Cool (0-9°C) |
| April | 8.9°C (48.0°F) | Cool (0-9°C) |
| May | 14.9°C (58.8°F) | Mild (10-17°C) |
| June | 21.5°C (70.7°F) | Warm (18-24°C) |
| July | 23.1°C (73.6°F) | Warm (18-24°C) |
| August | 22.9°C (73.2°F) | Warm (18-24°C) |
| September | 19.6°C (67.3°F) | Warm (18-24°C) |
| October | 12.9°C (55.2°F) | Mild (10-17°C) |
| November | 6.2°C (43.2°F) | Cool (0-9°C) |
| December | 1.0°C (33.8°F) | Cool (0-9°C) |
Monthly Precipitation Rating
| Month | Rainfall (mm) | Rainy Days | Rating |
|---|---|---|---|
| January | 74.6 mm | 7.2 | Wet |
| February | 54.7 mm | 5.4 | Moderate |
| March | 95.4 mm | 13.2 | Wet |
| April | 95.8 mm | 15.8 | Wet |
| May | 106.7 mm | 15.6 | Very Wet |
| June | 97.6 mm | 13.6 | Wet |
| July | 172.5 mm | 17.6 | Very Wet |
| August | 103.5 mm | 16.8 | Very Wet |
| September | 98.2 mm | 12.4 | Wet |
| October | 115.0 mm | 15.6 | Very Wet |
| November | 49.0 mm | 9.4 | Moderate |
| December | 62.0 mm | 10.2 | Wet |
Monthly Sunshine Rating
| Month | Sunshine (hrs/day) | Rating |
|---|---|---|
| January | 4.4 hrs | Moderate |
| February | 7.2 hrs | Good |
| March | 7.6 hrs | Good |
| April | 8.8 hrs | Excellent |
| May | 10.2 hrs | Excellent |
| June | 11.8 hrs | Excellent |
| July | 11.7 hrs | Excellent |
| August | 11.6 hrs | Excellent |
| September | 9.6 hrs | Excellent |
| October | 7.8 hrs | Good |
| November | 6.4 hrs | Good |
| December | 4.7 hrs | Moderate |
Season-by-Season Breakdown
Spring (Mar-May)
Temperature: 9.3°C (48.7°F)
Rainfall: 99.3mm avg
Sunshine: 8.9 hrs/day
Humidity: 72.5%
Rainy Days: 14.9/mo
Mild transitional weather — comfortable for most activities.
Summer (Jun-Aug)
Temperature: 22.5°C (72.5°F)
Rainfall: 124.5mm avg
Sunshine: 11.7 hrs/day
Humidity: 73.4%
Rainy Days: 16.0/mo
This is the warm season. Ideal for outdoor activities but be prepared for heat.
Autumn (Sep-Nov)
Temperature: 12.9°C (55.2°F)
Rainfall: 87.4mm avg
Sunshine: 7.9 hrs/day
Humidity: 71.5%
Rainy Days: 12.5/mo
Mild transitional weather — comfortable for most activities.
Winter (Dec-Feb)
Temperature: -1.2°C (29.8°F)
Rainfall: 63.8mm avg
Sunshine: 5.4 hrs/day
Humidity: 75.5%
Rainy Days: 7.6/mo
This is the cool season. Pack warm layers and plan indoor activities.
Frequently Asked Questions
What is the best time to visit Chicago?
Based on our data-driven analysis, the best months to visit Chicago are July, August, June, when temperatures are comfortable, rainfall is lower, and sunshine is plentiful. July scores 66/100, the highest-rated month.
What is the hottest month in Chicago?
July is the hottest month with an average temperature of 23.1°C (73.6°F).
What is the coldest month in Chicago?
January is the coldest month with an average temperature of -2.6°C (27.3°F).
When is the rainy season in Chicago?
July is the wettest month with an average of 172.5mm of precipitation. Chicago experiences about 153.0 rainy days per year. The driest month is November with 49.0mm.
What should I pack for a trip to Chicago?
Packing recommendations depend on the season of your visit. Based on the climate data, pack lightweight, breathable clothing if visiting during the warm months (July is hottest at 23.1°C). For cooler months, bring layers and a warm jacket (January averages -2.6°C). A waterproof jacket or umbrella is recommended year-round as Chicago receives 1125.0mm of annual precipitation. Sun protection is important, especially during months with high UV index.
There's something about Chicago in January that reveals the city's true character. I visited during the polar vortex — minus 25°C, Lake Michigan frozen at the edges, and the locals still walked to their neighborhood taverns as if nothing was unusual. The cultural calendar thrives in winter: theaters full, restaurants cozy, museums uncrowded. Summer (June-August) is when Chicago reclaims its lakefront — 25°C, festivals every weekend, the energy electric. I love October: 14°C, the city in autumn colors, and a melancholy knowing winter is coming. Each season reveals a different Chicago.
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 41.88°, -87.63°. Timezone: America/Chicago. Last updated: 2026-07-30.