Chicago Weather in January
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
January in Chicago sees average temperatures ranging from a low of -5.9°C (21.4°F) to a high of 0.7°C (33.3°F), with a mean of -2.6°C (27.3°F). Compared to the annual average of 10.9°C (51.6°F), this month is 13.5°C cooler than the yearly norm. This is the coldest month of the year, with average lows of -5.9°C (21.4°F). Precipitation averages 74.6mm, making it approximately 19.0mm drier than the monthly average of 94.0mm. The city receives an average of 4.4 hours of sunshine per day during January, with relative humidity averaging 78.3%. Wind speeds reach an average maximum of 25.8 km/h. Snowfall averages 27.6cm during January, which can affect travel plans and outdoor activities. For travelers, this month offers a coldest month of the year experience in Chicago, with drier-than-average conditions compared to the rest of the year.
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.
January vs Adjacent Months
| Metric | December | January | February |
|---|---|---|---|
| Mean Temp | 1.0°C (33.8°F) | -2.6°C (27.3°F) | -1.9°C (28.6°F) |
| Rainfall | 62.0mm | 74.6mm | 54.7mm |
| Sunshine | 4.7 hrs | 4.4 hrs | 7.2 hrs |
| Humidity | 75.3% | 78.3% | 72.9% |
| Wind | 25.2 km/h | 25.8 km/h | 28.2 km/h |
| Rainy Days | 10.2 | 7.2 | 5.4 |
| Snowfall | 5.6 cm | 27.6 cm | 17.5 cm |
Seasonal Context
January falls in Winter in the Northern Hemisphere. Winter is the coolest season with the shortest daylight hours. For travelers visiting Chicago in January, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in Chicago in January?
The average temperature in Chicago during January ranges from -5.9°C (21.4°F) to 0.7°C (33.3°F), with a mean of -2.6°C (27.3°F).
How much does it rain in Chicago in January?
Chicago receives an average of 74.6mm of precipitation in January, spread across approximately 7.2 rainy days.
What should I pack for Chicago in January?
Based on January weather data, pack heavy winter clothing, thermal layers, and a warm coat.
Is January a good time to visit Chicago?
January is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for Chicago
Cities with Similar January Climate (Humid Continental)
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.