Monthly climate ·Chicago weather in May
In May, Chicago averages around 19° by day and 10° at night, with 12 rain days a month — about a 39% chance of rain on any given day.
By day
19°C
At night
10°C
Daily rain chance
39%
Rain days a month
12
Monthly precipitation
125 mm
Sunshine hours a day
10.1
Average of 2016–2025 (Open-Meteo archive). Typical climate — not a forecast.
Is May a good time to visit Chicago?
May is a rainy month in Chicago — 12 rain days on average. Fine if you do not mind the rain, and usually a cheaper season too.
Every month in Chicago
Frequently asked questions
- What is the weather in Chicago in May?
- In May, temperatures in Chicago average between 10° at night and 19° by day, with 12 rain days a month (average of 2016–2025).
- How much rain falls in Chicago in May?
- Chicago gets about 125 mm of rain in May on average, spread over roughly 12 rain days.
- Is May a good time to visit Chicago?
- May is a rainy month in Chicago — 12 rain days on average. Fine if you do not mind the rain, and usually a cheaper season too.