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Eureka IL Weather - Partly Cloudy - 95°F
Partly Cloudy
95°F
Updated 2:55 pm
Feels Like 110°F
Humidity 49%
Wind SW 9 mph
Barometer  29.93 in
Dew Point 73°F
Eureka IL Weather - Partly Cloudy - 35°C
Partly Cloudy
35°C
Updated 2:55 pm
Feels Like 43°C
Humidity 49%
Wind SW 14 km/h
Barometer  101.4 kPa
Dew Point 23°C
Eureka, IL Weather and Current Conditionseureka il weather forecast

Eureka, IL Weather Forecast

Eureka Illinois WeatherEureka, Illinois Weather Weather Forecast
Here is the API 14 day weather forecast for Eureka, Illinois. Note: The 7-day weather forecast for Eureka, IL is the most reliable and accurate weather forecast. This template should only be used as a probable scenario. Forecasting weather beyond the next 7 days is a challenge.
Eureka, IL Weather Forecast Dated: 255 PM Thu Sep 03 2026
Expect a very warm period with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Thursday, September 3, 2026

Mid-Morning
Eureka Weather - 2026-09-03 - Morning - Sunny
82°F 28°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-03 - Afternoon - Sunny
96°F 36°C
Sunny
Early-Evening
Eureka Weather - 2026-09-03 - Evening - Nearby Thunderstorms
89°F 32°C
Nearby Thunderstorms
Sizzling hot near 96°F 36°C with a heat index reaching 108°F 42°C, periods of heavy thunderstorms, with lower humidity and steady pressure. Winds turning from the SW to the SSE at 10 mph 15 km/h. Gusts up to 21 mph 33 km/h.

Friday, September 4, 2026

Mid-Morning
Eureka Weather - 2026-09-04 - Morning - Scattered Showers
81°F 27°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-04 - Afternoon - Nearby Thunderstorms
93°F 34°C
Nearby Thunderstorms
Early-Evening
Eureka Weather - 2026-09-04 - Evening - Overcast
89°F 32°C
Overcast
Hot and sweltering around 93°F 34°C (heat index 99°F 37°C), scattered downpours possible, with steady humidity and steady pressure. Winds switching from the SW to the SSE at 6 mph 10 km/h.

Saturday, September 5, 2026

Mid-Morning
Eureka Weather - 2026-09-05 - Morning - Scattered Showers
79°F 26°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-05 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Eureka Weather - 2026-09-05 - Evening - Sunny
81°F 27°C
Sunny
Very hot with a high of 91°F 33°C, feeling closer to 95°F 35°C in the humidity, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the NNW to the ENE at 12 mph 20 km/h. Gusts up to 21 mph 33 km/h.

Sunday, September 6, 2026

Mid-Morning
Eureka Weather - 2026-09-06 - Morning - Sunny
71°F 22°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-06 - Afternoon - Sunny
80°F 27°C
Sunny
Early-Evening
Eureka Weather - 2026-09-06 - Evening - Sunny
73°F 23°C
Sunny
Warm temperatures up to 80°F 27°C, sunny throughout the day, with steady humidity and steady pressure. Winds out of the E at 12 mph 19 km/h. Gusts up to 20 mph 31 km/h.

Monday, September 7, 2026

Mid-Morning
Eureka Weather - 2026-09-07 - Morning - Sunny
63°F 17°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-07 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Eureka Weather - 2026-09-07 - Evening - Sunny
71°F 22°C
Sunny
Mild with a high of 77°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds shifting from the E to the ESE at 8 mph 13 km/h.

Tuesday, September 8, 2026

Mid-Morning
Eureka Weather - 2026-09-08 - Morning - Overcast
71°F 22°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-08 - Afternoon - Partly Cloudy
84°F 29°C
Partly Cloudy
Early-Evening
Eureka Weather - 2026-09-08 - Evening - Overcast
84°F 29°C
Overcast
Warm and summery near 84°F 29°C, partly cloudy in the morning, cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds SSE at 9 mph 14 km/h. Gusts up to 27 mph 44 km/h.

Wednesday, September 9, 2026

Mid-Morning
Eureka Weather - 2026-09-09 - Morning - Cloudy
85°F 29°C
Cloudy
Mid-Afternoon
Eureka Weather - 2026-09-09 - Afternoon - Cloudy
94°F 35°C
Cloudy
Early-Evening
Eureka Weather - 2026-09-09 - Evening - Overcast
87°F 31°C
Overcast
Hot and sweltering around 94°F 35°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds switching from the WSW to the ESE at 9 mph 15 km/h.

Thursday, September 10, 2026

Mid-Morning
Eureka Weather - 2026-09-10 - Morning - Scattered Showers
75°F 24°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-10 - Afternoon - Overcast
80°F 27°C
Overcast
Early-Evening
Eureka Weather - 2026-09-10 - Evening - Overcast
72°F 22°C
Overcast
Quite warm around 80°F 27°C, scattered downpours possible, with steady humidity and steady pressure. Winds moving from the NNE to the ESE at 9 mph 13 km/h.

Friday, September 11, 2026

Mid-Morning
Eureka Weather - 2026-09-11 - Morning - Cloudy
66°F 19°C
Cloudy
Mid-Afternoon
Eureka Weather - 2026-09-11 - Afternoon - Overcast
69°F 20°C
Overcast
Early-Evening
Eureka Weather - 2026-09-11 - Evening - Overcast
70°F 21°C
Overcast
Mild temperatures up to 69°F 20°C, overcast through the afternoon, turning cloudy this evening, with steady humidity and steady pressure.

Saturday, September 12, 2026

Mid-Morning
Eureka Weather - 2026-09-12 - Morning - Overcast
70°F 21°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-12 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Eureka Weather - 2026-09-12 - Evening - Partly Cloudy
81°F 27°C
Partly Cloudy
Very warm with a high of 84°F 29°C, overcast in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds SSE at 15 mph 23 km/h. Gusts up to 27 mph 43 km/h.

Sunday, September 13, 2026

Mid-Morning
Eureka Weather - 2026-09-13 - Morning - Scattered Showers
77°F 25°C
Scattered Showers
Mid-Afternoon
Eureka Weather - 2026-09-13 - Afternoon - Scattered Showers
84°F 29°C
Scattered Showers
Early-Evening
Eureka Weather - 2026-09-13 - Evening - Scattered Showers
77°F 26°C
Scattered Showers
Quite warm reaching 84°F 29°C, feeling like 89°F 32°C during peak afternoon, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds shifting from the SW to the W at 9 mph 14 km/h. Gusts up to 20 mph 32 km/h.

Monday, September 14, 2026

Mid-Morning
Eureka Weather - 2026-09-14 - Morning - Overcast
76°F 25°C
Overcast
Mid-Afternoon
Eureka Weather - 2026-09-14 - Afternoon - Partly Cloudy
90°F 32°C
Partly Cloudy
Early-Evening
Eureka Weather - 2026-09-14 - Evening - Sunny
74°F 23°C
Sunny
Very hot with a high of 90°F 32°C, feeling closer to 93°F 34°C in the humidity, cloudy in the morning, partly cloudy in the afternoon, and overcast this evening, with increasing humidity and steady pressure. Winds turning from the SW to the WNW at 15 mph 24 km/h. Gusts up to 26 mph 41 km/h.

Tuesday, September 15, 2026

Mid-Morning
Eureka Weather - 2026-09-15 - Morning - Sunny
62°F 17°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-15 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Eureka Weather - 2026-09-15 - Evening - Sunny
65°F 19°C
Sunny
Enjoyable around 72°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the W to the NW at 8 mph 13 km/h.

Wednesday, September 16, 2026

Mid-Morning
Eureka Weather - 2026-09-16 - Morning - Sunny
58°F 15°C
Sunny
Mid-Afternoon
Eureka Weather - 2026-09-16 - Afternoon - Sunny
69°F 20°C
Sunny
Early-Evening
Eureka Weather - 2026-09-16 - Evening - Partly Cloudy
65°F 19°C
Partly Cloudy
Mild temperatures up to 69°F 20°C, sunny in the morning, partly cloudy in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds moving from the NNW to the NNE at 7 mph 11 km/h.

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Weather by the Numbers

Thu, 3rd
Eureka IL Weather - Thursday, Sep 3, 2026 - Sunny
Hi: 96°F 36°C
Lo: 74°F 23°C
Sunrise 06:26 AM
Sunset 07:26 PM
Wind SW 11 mph18 km/h
Dew Point 77°F25°C
uv Index 8
Barometric Pressure 29.94 in1014 mb
POP 3% *
Humidity 57%
Fri, 4th
Eureka IL Weather - Friday, Sep 4, 2026 - Sunny
Hi: 93°F 34°C
Lo: 79°F 26°C
Sunrise 06:27 AM
Sunset 07:24 PM
Wind WSW 8 mph13 km/h
Dew Point 67°F19°C
uv Index 7
Barometric Pressure 29.91 in1013 mb
POP 2% *
Humidity 50%
Sat, 5th
Eureka IL Weather - Saturday, Sep 5, 2026 - Sunny
Hi: 91°F 33°C
Lo: 72°F 22°C
Sunrise 06:28 AM
Sunset 07:23 PM
Wind N 4 mph6 km/h
Dew Point 67°F19°C
uv Index 7
Barometric Pressure 29.88 in1012 mb
POP 2% *
Humidity 50%
Sun, 6th
Eureka IL Weather - Sunday, Sep 6, 2026 - Sunny
Hi: 80°F 27°C
Lo: 66°F 19°C
Sunrise 06:29 AM
Sunset 07:21 PM
Wind E 12 mph19 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 3% *
Humidity 53%
Mon, 7th
Eureka IL Weather - Monday, Sep 7, 2026 - Sunny
Hi: 77°F 25°C
Lo: 63°F 17°C
Sunrise 06:30 AM
Sunset 07:19 PM
Wind E 9 mph14 km/h
Dew Point 50°F10°C
uv Index 6
Barometric Pressure 30.15 in1021 mb
POP 2% *
Humidity 42%
Tue, 8th
Eureka IL Weather - Tuesday, Sep 8, 2026 - Partly Cloudy
Hi: 85°F 29°C
Lo: 64°F 18°C
Sunrise 06:31 AM
Sunset 07:18 PM
Wind SSE 9 mph15 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 30.06 in1018 mb
POP 3% *
Humidity 48%
Wed, 9th
Eureka IL Weather - Wednesday, Sep 9, 2026 - Cloudy
Hi: 95°F 35°C
Lo: 82°F 28°C
Sunrise 06:32 AM
Sunset 07:16 PM
Wind WSW 9 mph15 km/h
Dew Point 59°F15°C
uv Index 7
Barometric Pressure 29.94 in1014 mb
POP 7% *
Humidity 35%
Thu, 10th
Eureka IL Weather - Thursday, Sep 10, 2026 - Overcast
Hi: 84°F 29°C
Lo: 65°F 18°C
Sunrise 06:33 AM
Sunset 07:14 PM
Wind WSW 11 mph18 km/h
Dew Point 52°F11°C
uv Index 6
Barometric Pressure 29.97 in1015 mb
POP 10% *
Humidity 40%
Fri, 11th
Eureka IL Weather - Friday, Sep 11, 2026 - Overcast
Hi: 72°F 22°C
Lo: 63°F 17°C
Sunrise 06:34 AM
Sunset 07:13 PM
Wind ENE 5 mph8 km/h
Dew Point 53°F12°C
uv Index 4
Barometric Pressure 30.09 in1019 mb
POP 15% *
Humidity 61%
Sat, 12th
Eureka IL Weather - Saturday, Sep 12, 2026 - Patchy Rain Nearby
Hi: 86°F 30°C
Lo: 65°F 18°C
Sunrise 06:35 AM
Sunset 07:11 PM
Wind SE 13 mph20 km/h
Dew Point 58°F15°C
uv Index 6
Barometric Pressure 30.03 in1017 mb
POP 17% *
Humidity 50%
Sun, 13th
Eureka IL Weather - Sunday, Sep 13, 2026 - Overcast
Hi: 86°F 30°C
Lo: 72°F 22°C
Sunrise 06:36 AM
Sunset 07:09 PM
Wind SW 9 mph15 km/h
Dew Point 68°F20°C
uv Index 6
Barometric Pressure 29.83 in1010 mb
POP 24% *
Humidity 65%
Mon, 14th
Eureka IL Weather - Monday, Sep 14, 2026 - Partly Cloudy
Hi: 91°F 33°C
Lo: 67°F 19°C
Sunrise 06:37 AM
Sunset 07:08 PM
Wind SW 17 mph28 km/h
Dew Point 66°F19°C
uv Index 7
Barometric Pressure 29.68 in1005 mb
POP 4% *
Humidity 55%
Tue, 15th
Eureka IL Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 72°F 22°C
Lo: 56°F 13°C
Sunrise 06:38 AM
Sunset 07:06 PM
Wind W 18 mph28 km/h
Dew Point 45°F7°C
uv Index 6
Barometric Pressure 29.83 in1010 mb
POP 1% *
Humidity 42%
Wed, 16th
Eureka IL Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 69°F 21°C
Lo: 54°F 12°C
Sunrise 06:39 AM
Sunset 07:04 PM
Wind NNW 9 mph14 km/h
Dew Point 47°F8°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 2% *
Humidity 52%
* POP = Probability of Precipitation. Data for 12:00 PM.