Joliet (IL)
May
Weather in Joliet, Illinois for May 2026
Your guide to Joliet weather in May - trends and predictions
In general, the average temperature in Joliet at the beginning of May is 19.3 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 22 °F by the end of May.
Joliet in May brings notable rainfall, with an average of 17 rainy days and a total precipitation of 168.5 mm.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
14
Dry days
17
Rainy days
0
Snow days
22°/11°
Temperatures
19 km/h
Avg max wind
71 %
Avg humidity
Joliet Weather May
Move between months or click on a day
Temperatures trend during May in Joliet
See the weather trend as well as the moving average line
May weather in Joliet day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 21° /13° | 17.8 mm | 5 | |
| May 2 |  Moderate rain at times | 20° /10° | 6.2 mm | 5 | |
| May 3 | Light rain shower | 19° /9° | 1.6 mm | 5 | |
| May 4 | Moderate or heavy rain shower | 16° /8° | 17.5 mm | 4 | |
| May 5 |  Cloudy | 17° /8° | 0 mm | 4 | |
| May 6 |  Partly cloudy | 21° /8° | 0 mm | 5 | |
| May 7 |  Patchy light rain with thunder | 21° /11° | 7.6 mm | 5 | |
| May 8 |  Thundery outbreaks possible | 20° /9° | 9.6 mm | 5 | |
| May 9 |  Light rain | 17° /4° | 2.6 mm | 4 | |
| May 10 | Patchy rain possible | 21° /7° | 0.2 mm | 6 | |
| May 11 | Cloudy | 22° /7° | 2.3 mm | 5 | |
| May 12 | Patchy rain possible | 25° /10° | 0.5 mm | 6 | |
| May 13 | Light rain shower | 23° /15° | 13.3 mm | 5 | |
| May 14 | Light rain | 20° /12° | 13.6 mm | 5 | |
| May 15 | Patchy rain possible | 25° /12° | 0.2 mm | 6 | |
| May 16 | Light rain shower | 26° /13° | 23 mm | 6 | |
| May 17 | Light rain shower | 21° /12° | 5 mm | 5 | |
| May 18 |  Fog | 20° /11° | 0.1 mm | 5 | |
| May 19 | Light rain shower | 22° /11° | 9.9 mm | 5 | |
| May 20 | Partly cloudy | 17° /8° | 31.5 mm | 5 | |
| May 21 | Partly cloudy | 18° /9° | 24.9 mm | 5 | |
| May 22 | Partly cloudy | 21° /10° | 0.4 mm | 5 | |
| May 23 |  Sunny | 24° /11° | 0 mm | 6 | |
| May 24 | Cloudy | 22° /10° | 7 mm | 5 | |
| May 25 | Partly cloudy | 20° /8° | 0 mm | 5 | |
| May 26 | Partly cloudy | 22° /8° | 8.4 mm | 5 | |
| May 27 | Sunny | 20° /10° | 2.6 mm | 5 | |
| May 28 | Sunny | 21° /11° | 0.9 mm | 5 | |
| May 29 | Sunny | 22° /11° | 0 mm | 5 | |
| May 30 |  Overcast | 24° /11° | 2 mm | 6 | |
| May 31 |  Heavy rain at times | 25° /12° | 0.9 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Joliet in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Joliet forecast closer to your planned date for the most up-to-date weather information.
Change Month
Joliet in May - FAQ
What are the expected maximum and minimum temperatures in Joliet during May?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Joliet during May?
Significant rainfall exceeding 168.5 mm is expected in Joliet during May, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Joliet during May?
The average wind speed in Joliet during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Joliet
Explore the daily rainfall trends and prepare for Joliets May weather 💧
UV exposure in Joliet during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Quick links
More Joliet weather pages
You are here
Where is Joliet?Get accurate weather forecasts for Joliet, located at latitude 41.525 and longitude -88.083. Stay updated with localized weather information tailored for Joliet.
Found a mistake?
We appreciate your attention to details. Tell us here.