Chicago weather by month
The best time to visit Chicago, United States is September. Pick a month for full climate normals and a verdict.
- Januaryfreezing, a little rain, clean air41tier F
- Februaryfreezing, a little rain, clean air45tier F
- Marchcold, rainy, clean air63tier C
- Aprilcool, rainy, clean air73tier B
- Maynice, rainy82tier A
- Junewarm, rainy88tier A
- Julyhot, rainy80tier A
- Augusthot, a little rain84tier A
- Septemberwarm, rainy, clean air90tier S
- Octobercool, rainy, clean air74tier B
- Novembercold, a little rain, clean air66tier C
- Decembercold, a little rain, clean air53tier D