Will County (Joliet)
May
Weather in Will County, Illinois for May 2026
Your guide to Will County weather in May - trends and predictions
The forecast for the next days in Will County predicts temperatures to be around 20 °F, close to the historical average.
In general, the average temperature in Will County at the beginning of May is 17.6 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 22 °F by the end of May.
Will County in May brings notable rainfall, with an average of 20 rainy days and a total precipitation of 209.6 mm.
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Temperatures
Rain 🌧️
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11
Dry days
20
Rainy days
0
Snow days
21°/10°
Temperatures
20 km/h
Avg max wind
72 %
Avg humidity
Will County Weather May
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Temperatures trend during May in Will County
See the weather trend as well as the moving average line
May weather in Will County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 17° /9° | 12.4 mm | 5 | |
| May 2 |  Overcast | 17° /7° | 4.1 mm | 6 | |
| May 3 | Light rain shower | 19° /8° | 1.3 mm | 5 | |
| May 4 |  Moderate or heavy rain shower | 19° /8° | 14.6 mm | 5 | |
| May 5 |  Cloudy | 16° /8° | 0.8 mm | 4 | |
| May 6 |  Sunny | 18° /5° | 0 mm | 5.3 | |
| May 7 | Patchy rain possible | 17° /5° | 1.7 mm | 5.6 | |
| May 8 |  Moderate rain | 16° /9° | 8 mm | 0.3 | |
| May 9 | Patchy rain possible | 21° /7° | 1.2 mm | 3 | |
| May 10 | Moderate rain | 16° /8° | 10.7 mm | 3 | |
| May 11 | Patchy rain possible | 21° /7° | 0.8 mm | 3 | |
| May 12 | Patchy rain possible | 23° /13° | 2.7 mm | 4 | |
| May 13 | Patchy rain possible | 27° /13° | 0.6 mm | 4 | |
| May 14 | Patchy rain possible | 25° /16° | 4.9 mm | 4 | |
| May 15 | Patchy rain possible | 18° /8° | 4.9 mm | 3 | |
| May 16 | Patchy rain possible | 19° /9° | 0.5 mm | 3 | |
| May 17 |  Partly cloudy | 16° /9° | 0.1 mm | 4 | |
| May 18 | Sunny | 17° /8° | 0 mm | 4 | |
| May 19 | Partly cloudy | 19° /7° | 0 mm | 4 | |
| 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 | |
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Important Notice
Our weather forecast for Will County 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 Will County forecast closer to your planned date for the most up-to-date weather information.
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Will County in May - FAQ
What are the expected maximum and minimum temperatures in Will County during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Will County during May?
Significant rainfall exceeding 209.6 mm is expected in Will County during May, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Will County during May?
The average wind speed in Will County during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Will County
Explore the daily rainfall trends and prepare for Will Countys May weather 💧
Typically, Will County has 20 rainy days in May with a total of 209.6 mm of rainfall.
UV exposure in Will County during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Will County?Get accurate weather forecasts for Will County, located at latitude 41.525 and longitude -88.083. Stay updated with localized weather information tailored for Will County.
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