Chicago Weather in May
United States · Humid Continental climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
May in Chicago sees average temperatures ranging from a low of 10.4°C (50.7°F) to a high of 19.3°C (66.7°F), with a mean of 14.9°C (58.8°F). Compared to the annual average of 10.9°C (51.6°F), this month is 4.0°C warmer than the yearly norm. Precipitation averages 106.7mm, making it approximately 13.0mm wetter than the monthly average of 94.0mm. The city receives an average of 10.2 hours of sunshine per day during May, with relative humidity averaging 73.1%. Wind speeds reach an average maximum of 25.3 km/h. Snowfall averages 0.1cm during May, which can affect travel plans and outdoor activities. For travelers, this month offers a temperature experience in Chicago, with wetter-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.
May vs Adjacent Months
| Metric | April | May | June |
|---|---|---|---|
| Mean Temp | 8.9°C (48.0°F) | 14.9°C (58.8°F) | 21.5°C (70.7°F) |
| Rainfall | 95.8mm | 106.7mm | 97.6mm |
| Sunshine | 8.8 hrs | 10.2 hrs | 11.8 hrs |
| Humidity | 71.0% | 73.1% | 68.8% |
| Wind | 28.1 km/h | 25.3 km/h | 24.6 km/h |
| Rainy Days | 15.8 | 15.6 | 13.6 |
| Snowfall | 4.2 cm | 0.1 cm | 0.0 cm |
Seasonal Context
May falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting Chicago in May, 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 May?
The average temperature in Chicago during May ranges from 10.4°C (50.7°F) to 19.3°C (66.7°F), with a mean of 14.9°C (58.8°F).
How much does it rain in Chicago in May?
Chicago receives an average of 106.7mm of precipitation in May, spread across approximately 15.6 rainy days.
What should I pack for Chicago in May?
Based on May weather data, pack warm layers, a medium jacket, and waterproof outerwear. Rain gear is essential — this month averages 106.7mm of precipitation.
Is May a good time to visit Chicago?
May 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 May 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.