United States · North America
What to Wear in Chicago
Month-by-month temperatures, rainfall, and clothing recommendations for Chicago, United States. Find out what to pack for every season.
Warmest month
July
29°C / 84°F
Coolest month
January
-1°C / 30°F
Wettest month
May
105 mm
Best months
May, June, July
Monthly climate & clothing guide
| Month | High | Low | Rain | Humidity | Climate |
|---|---|---|---|---|---|
| January | -1°C / 30°F | -9°C / 16°F | 45 mm | moderate | Cold |
| February | 1°C / 34°F | -7°C / 19°F | 45 mm | moderate | Cold |
| March | 8°C / 46°F | -2°C / 28°F | 64 mm | moderate | Cold |
| April | 15°C / 59°F | 4°C / 39°F | 93 mm | moderate | Cool |
| May | 21°C / 70°F | 10°C / 50°F | 105 mm | moderate | Mild |
| June | 27°C / 81°F | 16°C / 61°F | 103 mm | moderate | Warm |
| July | 29°C / 84°F | 19°C / 66°F | 101 mm | high | Warm |
| August | 28°C / 82°F | 18°C / 64°F | 100 mm | high | Warm |
| September | 25°C / 77°F | 14°C / 57°F | 81 mm | moderate | Warm |
| October | 17°C / 63°F | 8°C / 46°F | 82 mm | moderate | Cool |
| November | 10°C / 50°F | 1°C / 34°F | 78 mm | moderate | Cool |
| December | 2°C / 36°F | -6°C / 21°F | 58 mm | moderate | Cold |
Seasonal clothing guide for Chicago
Winter (Dec-Feb)
ColdAverage highs 1°C (34°F), lows -7°C (19°F). Total seasonal rainfall: 148 mm.
Full winter layering required. Multiple insulating layers, a weatherproof outer shell, and warm accessories are essential for comfort.
Spring (Mar-May)
CoolAverage highs 15°C (59°F), lows 4°C (39°F). Total seasonal rainfall: 262 mm.
Jacket weather. A proper 3-layer system with insulation keeps you comfortable during full days outdoors. Mornings and evenings need extra warmth.
Summer (Jun-Aug)
WarmAverage highs 28°C (82°F), lows 18°C (64°F). Total seasonal rainfall: 304 mm.
Comfortable temperatures with minimal layering needed. Focus on versatile pieces that work day and evening.
Fall (Sep-Nov)
CoolAverage highs 17°C (63°F), lows 8°C (46°F). Total seasonal rainfall: 241 mm.
Jacket weather. A proper 3-layer system with insulation keeps you comfortable during full days outdoors. Mornings and evenings need extra warmth.
FAQ
What should I wear when visiting Chicago?
What to wear in Chicago depends on the month. The warmest month is July (avg high 29°C / 84°F) and the coldest is January (avg high -1°C / 30°F). Check the month-by-month table above for specific clothing recommendations.
What is the best time to visit Chicago?
For comfortable weather and easy packing, the best months to visit Chicago are May, June, July, August, September. These months have mild to warm temperatures with manageable rainfall.
Does it rain a lot in Chicago?
The wettest month in Chicago is May with an average of 105 mm of rainfall. A packable rain jacket is recommended.
Do I need warm clothes for Chicago?
Yes. Chicago's coldest month is January with average highs of -1°C (30°F). You will need a proper layering system with insulation if visiting during the cooler months.
Ready to pack for Chicago?
Use our interactive tool to compare climates and get layering advice.
Open Climate Calendar