Live Weather & Forecast
Weather in Greenville
Illinois, United States · Real-time conditions & 3-day outlook
18°C
Feels like 18°C
64°F / Feels 64°F
Partly Cloudy
Greenville, Illinois
🌙 Nighttime
Updated: 2026-04-13 04:15
Humidity
83%
Wind
21.2 km/h SSW
Wind Gust
34.2 km/h
Pressure
1015 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
15.4°C
Wind Degree
200°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
144.9 μg/m³
NO₂
4.1 μg/m³
O₃
74 μg/m³
SO₂
2.1 μg/m³
PM 2.5
3.6 μg/m³
PM 10
3.8 μg/m³
Weather Alerts 1
Met
· Moderate · Expected
Special Weather Statement issued April 12 at 10:23PM CDT by NWS Lincoln IL
Moderately strong winds out of the south to southwest will continue late this evening into the overnight hours. Expect a few sporadic gusts of 40 to 50 mph with more frequent gusts of 25 to 40 mph. These winds can make driving difficult, especially for high profile vehicles.
Today's Hourly Forecast
24-hour breakdown for Greenville, Illinois
12 AM
20°
Clear
1 AM
19°
Clear
2 AM
19°
Clear
3 AM
19°
Clear
4 AM
18°
Partly Cloudy
5 AM
19°
Clear
6 AM
19°
Partly Cloudy
7 AM
20°
Overcast
8 AM
20°
Cloudy
9 AM
21°
Overcast
10 AM
22°
Cloudy
11 AM
24°
Cloudy
12 PM
25°
Cloudy
1 PM
26°
Cloudy
2 PM
28°
Partly Cloudy
3 PM
29°
Sunny
4 PM
29°
Sunny
5 PM
26°
Sunny
6 PM
25°
Thundery outbreaks in nearby
7 PM
24°
Thundery outbreaks in nearby
8 PM
23°
Thundery outbreaks in nearby
9 PM
22°
Thundery outbreaks in nearby
10 PM
22°
Cloudy
11 PM
21°
Thundery outbreaks in nearby
3-Day Forecast
Daily overview for Greenville, Illinois
Today
Cloudy
30°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 30.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:24 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Thundery outbreaks in nearby
25°
/
19°
🌧️ 0% chance of rain
💧 Avg. humidity: 79%
💨 Max wind: 32.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:34 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
23°
/
19°
🌧️ 88% chance of rain
💧 Avg. humidity: 83%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 9.3 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:35 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Greenville
Plan your trip to Greenville, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Greenville?
Current conditions in Greenville: Partly Cloudy, temperature 18°C, humidity 83%.
What is the best time to visit Greenville?
The best time to visit Greenville is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Greenville?
Greenville is located at approximately 38.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Greenville?
The wettest period in Greenville is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Greenville?
For visits to Greenville during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Greenville in?
Greenville is located in United States, in the state of Illinois.
What are the public holidays in Greenville in 2026?
View the 2026 public holidays for Greenville on our Holidays page.
What are the GPS coordinates used for the weather forecast in Greenville?
The weather forecast for Greenville uses coordinates 38.8923, -89.4131.