Live Weather & Forecast
Weather in Eureka
Illinois, United States · Real-time conditions & 3-day outlook
17°C
Feels like 17°C
63°F / Feels 63°F
Partly cloudy
Eureka, Illinois
🌙 Nighttime
Updated: 2026-04-13 04:15
Humidity
87%
Wind
24.5 km/h SSW
Wind Gust
38.3 km/h
Pressure
1011 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
50%
Dew Point
15.1°C
Wind Degree
213°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
149.9 μg/m³
NO₂
3.6 μg/m³
O₃
70 μg/m³
SO₂
1.9 μg/m³
PM 2.5
4 μg/m³
PM 10
4.3 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 Eureka, Illinois
12 AM
17°
Patchy rain nearby
1 AM
17°
Clear
2 AM
17°
Clear
3 AM
17°
Clear
4 AM
17°
Partly cloudy
5 AM
18°
Clear
6 AM
18°
Overcast
7 AM
18°
Partly Cloudy
8 AM
19°
Overcast
9 AM
20°
Overcast
10 AM
21°
Overcast
11 AM
22°
Overcast
12 PM
23°
Cloudy
1 PM
24°
Partly Cloudy
2 PM
22°
Patchy rain nearby
3 PM
24°
Heavy rain at times
4 PM
25°
Patchy rain nearby
5 PM
24°
Sunny
6 PM
23°
Thundery outbreaks in nearby
7 PM
22°
Thundery outbreaks in nearby
8 PM
21°
Overcast
9 PM
21°
Overcast
10 PM
21°
Overcast
11 PM
20°
Overcast
3-Day Forecast
Daily overview for Eureka, Illinois
Today
Moderate rain
27°
/
17°
🌧️ 83% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 30.6 km/h
🌧️ Total precip: 9.07 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:21 AM
🌇 Sunset: 07:35 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
25°
/
19°
🌧️ 82% chance of rain
💧 Avg. humidity: 86%
💨 Max wind: 31.3 km/h
🌧️ Total precip: 0.24 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:36 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Moderate rain
21°
/
19°
🌧️ 84% chance of rain
💧 Avg. humidity: 88%
💨 Max wind: 33.8 km/h
🌧️ Total precip: 15.24 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:18 AM
🌇 Sunset: 07:37 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Eureka
Plan your trip to Eureka, 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 Eureka?
Current conditions in Eureka: Partly cloudy, temperature 17°C, humidity 87%.
What is the best time to visit Eureka?
The best time to visit Eureka is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Eureka?
Eureka is located at approximately 40.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Eureka?
The wettest period in Eureka is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Eureka?
For visits to Eureka during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Eureka in?
Eureka is located in United States, in the state of Illinois.
What are the public holidays in Eureka in 2026?
View the 2026 public holidays for Eureka on our Holidays page.
What are the GPS coordinates used for the weather forecast in Eureka?
The weather forecast for Eureka uses coordinates 40.7213, -89.2727.