easeweather.com
Units
°C
°F
Williamson County
Forecast Today Tomorrow
more
Illinois United States

Weather in Williamson County for May 2025

Your guide to Williamson County weather in May - trends and predictions

    Temperatures

  • In general, the average temperature in Williamson County at the beginning of May is 24.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 24.1 °F by the end of May.

  • Rain 🌧️

  • Williamson County in May brings notable rainfall, with an average of 18 rainy days and a total precipitation of 182.8 mm.

  • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
13
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/15°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Williamson County in May average weather

Move between months or click on a day
Select a date

You can click on date

Access Williamson County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Got it

Temperatures trend during May in Williamson County

See the weather trend as well as the moving average line

May weather day by day

Click on a date for more information
Date Weather Temperatures Rain UV More
May 1 Thundery outbreaks possible
Thundery outbreaks possible
27° /14° 3 mm 6
May 2 Sunny
Sunny
26° /16° 5.9 mm 7
May 3 Patchy rain possible
Patchy rain possible
24° /16° 12.6 mm 5
May 4 Light drizzle
Light drizzle
26° /15° 2.3 mm 6
May 5 Light rain shower
Light rain shower
22° /16° 14.5 mm 5
May 6 Light rain shower
Light rain shower
22° /17° 18.2 mm 5
May 7 Light rain shower
Light rain shower
26° /19° 4 mm 6
May 8 Patchy light rain with thunder
Patchy light rain with thunder
27° /14° 7.3 mm 6
May 9 Patchy rain possible
Patchy rain possible
22° /11° 0 mm 5
May 10 Patchy rain possible
Patchy rain possible
18° /11° 0.1 mm 4
May 11 Partly cloudy
Partly cloudy
21° /11° 0 mm 6
May 12 Partly cloudy
Partly cloudy
23° /11° 0.1 mm 6
May 13 Light rain shower
Light rain shower
18° /16° 12.8 mm 4
May 14 Patchy light rain with thunder
Patchy light rain with thunder
22° /13° 42.8 mm 5
May 15 Patchy rain possible
Patchy rain possible
20° /15° 2.4 mm 5
May 16 Light rain shower
Light rain shower
23° /14° 10.8 mm 5
May 17 Light rain shower
Light rain shower
20° /17° 12.4 mm 5
May 18 Fog
Fog
23° /14° 0.4 mm 5
May 19 Patchy rain possible
Patchy rain possible
27° /17° 0.1 mm 6
May 20 Thundery outbreaks possible
Thundery outbreaks possible
27° /18° 0 mm 6
May 21 Partly cloudy
Partly cloudy
29° /18° 0 mm 7
May 22 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
26° /18° 16.4 mm 6
May 23 Light rain shower
Light rain shower
24° /16° 2.8 mm 5
May 24 Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
27° /18° 2.6 mm 6
May 25 Thundery outbreaks possible
Thundery outbreaks possible
27° /18° 0.7 mm 6
May 26 Thundery outbreaks possible
Thundery outbreaks possible
30° /20° 6 mm 7
May 27 Patchy rain possible
Patchy rain possible
24° /17° 0.1 mm 5
May 28 Sunny
Sunny
23° /15° 0 mm 6
May 29 Partly cloudy
Partly cloudy
22° /12° 0 mm 6
May 30 Sunny
Sunny
22° /11° 0 mm 6
May 31 Patchy light drizzle
Patchy light drizzle
21° /13° 4.6 mm 5
Next
Important Notice
Our weather forecast for Williamson 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 Williamson County forecast closer to your planned date for the most up-to-date weather information.

Williamson County in May - FAQ

What are the expected maximum and minimum temperatures in Williamson County during May?
During May, expect a variety of temperatures with highs around 24° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Williamson County during May?
Significant rainfall exceeding 182.8 mm is expected in Williamson County during May, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Williamson County during May?
The average wind speed in Williamson County during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.

May rainfall patterns in Williamson County

Explore the daily rainfall trends and prepare for Williamson Countys May weather 💧

UV exposure in Williamson County during May

Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
Top locations in Williamson County
Select a location for an accurate weather forecast
More Locations

Quick links

Location coordinates Where is Williamson County?

Get accurate weather forecasts for Williamson County, located at latitude 37.774 and longitude -89.026. Stay updated with localized weather information tailored for Williamson County.

Found a mistake?
We appreciate your attention to details. Tell us here.