Baby clothes in Chicago, IL: the weather each month
In shortIn Chicago, IL, the average temperature goes from 26 °F (-3.3 °C) in January to 74 °F (23.4 °C) in July, a swing of 48 °F (26.7 °C). A baby born on October 15 needs 2 snowsuits or buntings by 6 months; one born on April 15, 0.
The typical weather in Chicago
| Month | Average | Low | High |
|---|---|---|---|
| January | 26 °F (-3.3 °C) | 20 °F (-6.6 °C) | 32 °F (-0.1 °C) |
| February | 29 °F (-1.4 °C) | 23 °F (-4.9 °C) | 36 °F (2.1 °C) |
| March | 38 °F (3.3 °C) | 31 °F (-0.6 °C) | 45 °F (7.2 °C) |
| April | 48 °F (8.8 °C) | 40 °F (4.7 °C) | 55 °F (12.9 °C) |
| May | 58 °F (14.4 °C) | 50 °F (10.1 °C) | 66 °F (18.7 °C) |
| June | 68 °F (19.9 °C) | 60 °F (15.6 °C) | 76 °F (24.3 °C) |
| July | 74 °F (23.4 °C) | 67 °F (19.6 °C) | 81 °F (27.2 °C) |
| August | 74 °F (23.2 °C) | 67 °F (19.7 °C) | 80 °F (26.7 °C) |
| September | 67 °F (19.3 °C) | 60 °F (15.7 °C) | 73 °F (22.9 °C) |
| October | 54 °F (12.4 °C) | 48 °F (8.7 °C) | 61 °F (16.1 °C) |
| November | 42 °F (5.8 °C) | 36 °F (2.4 °C) | 49 °F (9.2 °C) |
| December | 31 °F (-0.6 °C) | 25 °F (-3.8 °C) | 37 °F (2.6 °C) |
Freezing months, with an average low below 32 °F (0 °C): from December to March. In those months the list adds: snowsuit or bunting. Warm one-piece or bag for going out on freezing days. Comes off before buckling the car seat and when you get home.
Typical weather, the average of many years; not a forecast. Climate normals: NOAA National Centers for Environmental Information, U.S. Climate Normals 1991-2020, station CHICAGO NORTHERLY IS, IL US (USC00111550). Palecki, M., Durre, I., Applequist, S., Arguez, A., Lawrimore, J. (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). https://doi.org/10.25921/wck8-er13. Accessed 2026-10-13.
What a baby born in Chicago needs, by birth month
A baby born on October 15 spends 183 of the first 183 days in cold months and needs 2 snowsuits or buntings by 6 months; a baby born on April 15, 0. The table shows all 12 months.
| Born on | Cold days in the first 6 months | Long-sleeve bodysuits | Short-sleeve bodysuits | Fleece sleepers | Snowsuits or buntings |
|---|---|---|---|---|---|
| January 15 | 137 of 183 | 7 | 7 | 2 | 1 |
| February 15 | 106 of 183 | 7 | 7 | 2 | 1 |
| March 15 | 78 of 183 | 7 | 7 | 2 | 1 |
| April 15 | 61 of 183 | 7 | 7 | 2 | 0 |
| May 15 | 61 of 183 | 7 | 7 | 2 | 0 |
| June 15 | 75 of 183 | 7 | 7 | 2 | 1 |
| July 15 | 105 of 183 | 7 | 7 | 2 | 1 |
| August 15 | 136 of 183 | 7 | 7 | 2 | 1 |
| September 15 | 167 of 183 | 7 | 7 | 2 | 1 |
| October 15 | 183 of 183 | 7 | 7 | 2 | 2 |
| November 15 | 183 of 183 | 7 | 7 | 2 | 2 |
| December 15 | 168 of 183 | 7 | 7 | 2 | 2 |
Without heating at home, a baby born on October 15 would need 12 long-sleeve bodysuits.
Cotokim's list engine, balanced style, laundry every 2 days, for 1 baby born on the 15th of each month, with a clothes dryer and a home heated in winter (the tool's starting answers in this country). A month is cold when its average is below 64 °F (18 °C), and hot from 75 °F (24 °C) up. The exact due date changes the numbers a little; the tool does the math for your month.
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The list for your baby in Chicago
Pick the due month: the list follows the weather of each month your baby wears each size, with the reason behind every number.
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