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As of 17:56 CDT

Weather in Eureka, IL

83°Current weather

Eureka, Saturday, 8 August, 17:56

Clear. Feels like 88°. High 84°, low 69°.

Pressure30.00 inHg
Wind3.9 mph NW
Humidity67%
Visibility6.2 mi
Dew point71°
Sun, 0993° / 69°0Overcast
93 °Overcast

Eureka, Sunday, 9 August

Overcast. High 93°, low 69°.

Pressure29.91 inHg
Wind16.8 mph S
Humidity74%
Visibility6.2 mi
Dew point75°
Mon, 1091° / 76°0.05Light rain
91 °Light rain

Eureka, Monday, 10 August

Light rain. High 91°, low 76°.

Pressure29.91 inHg
Wind10.4 mph SW
Humidity63%
Visibility6.2 mi
Dew point74°
Tue, 1189° / 71°0.1Light rain
89 °Light rain

Eureka, Tuesday, 11 August

Light rain. High 89°, low 71°.

Pressure29.83 inHg
Wind6.3 mph S
Humidity74%
Visibility6.2 mi
Dew point73°
Wed, 1277° / 68°0.04Light rain
77 °Light rain

Eureka, Wednesday, 12 August

Light rain. High 77°, low 68°.

Pressure29.88 inHg
Wind9.9 mph NE
Humidity78%
Visibility6.2 mi
Dew point71°
Thu, 1370° / 64°0.44Rain
70 °Rain

Eureka, Thursday, 13 August

Rain. High 70°, low 64°.

Pressure29.91 inHg
Wind10 mph NE
Humidity96%
Visibility—
Dew point69°
Fri, 1474° / 55°0Clear
74 °Clear

Eureka, Friday, 14 August

Clear. High 74°, low 55°.

Pressure30.18 inHg
Wind7.8 mph NE
Humidity64%
Visibility—
Dew point58°
Sat, 1573° / 55°0Partly cloudy
73 °Partly cloudy

Eureka, Saturday, 15 August

Partly cloudy. High 73°, low 55°.

Pressure30.30 inHg
Wind8 mph SE
Humidity58%
Visibility—
Dew point54°
Sun, 1678° / 56°0Partly cloudy
78 °Partly cloudy

Eureka, Sunday, 16 August

Partly cloudy. High 78°, low 56°.

Pressure30.18 inHg
Wind11.7 mph S
Humidity66%
Visibility—
Dew point60°
Mon, 1780° / 66°0.04Light rain
80 °Light rain

Eureka, Monday, 17 August

Light rain. High 80°, low 66°.

Pressure29.97 inHg
Wind11.3 mph S
Humidity85%
Visibility—
Dew point72°
Tue, 1882° / 70°0.02Light rain
82 °Light rain

Eureka, Tuesday, 18 August

Light rain. High 82°, low 70°.

Pressure30.00 inHg
Wind7.3 mph NE
Humidity73%
Visibility—
Dew point71°
Wed, 1986° / 67°0.1Light rain
86 °Light rain

Eureka, Wednesday, 19 August

Light rain. High 86°, low 67°.

Pressure29.91 inHg
Wind8.5 mph S
Humidity69%
Visibility—
Dew point71°
Thu, 2080° / 67°0.14Light rain
80 °Light rain

Eureka, Thursday, 20 August

Light rain. High 80°, low 67°.

Pressure29.88 inHg
Wind9 mph N
Humidity69%
Visibility—
Dew point68°
Fri, 2180° / 63°0Mostly clear
80 °Mostly clear

Eureka, Friday, 21 August

Mostly clear. High 80°, low 63°.

Pressure29.97 inHg
Wind7.9 mph NE
Humidity64%
Visibility—
Dew point63°
Sat, 2281° / 60°0.02Light rain
81 °Light rain

Eureka, Saturday, 22 August

Light rain. High 81°, low 60°.

Pressure29.91 inHg
Wind17.6 mph NE
Humidity62%
Visibility—
Dew point64°
Sun, 2367° / 49°0Mostly clear
67 °Mostly clear

Eureka, Sunday, 23 August

Mostly clear. High 67°, low 49°.

Pressure30.21 inHg
Wind13.6 mph E
Humidity52%
Visibility—
Dew point45°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Eureka, IL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Eureka, IL since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.