As of 17:44 CDT

Weather in Eureka, IL

75°

Eureka, Saturday, 10 October, 17:44

Overcast. Feels like 74°. High 80°, low 58°.

Pressure30.00 inHg

Wind6.1 mph SE

Humidity48%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

Sun, 1181° / 53°

81 °

Eureka, Sunday, 11 October

Clear. High 81°, low 53°.

Pressure29.97 inHg

Wind4 mph S

Humidity57%

Visibility6.2 mi

Dew point57°

Mon, 1283° / 61°

83 °

Eureka, Monday, 12 October

Clear. High 83°, low 61°.

Pressure29.85 inHg

Wind11.9 mph SW

Humidity59%

Visibility6.2 mi

Dew point64°

Tue, 1382° / 69°

82 °

Eureka, Tuesday, 13 October

Partly cloudy. High 82°, low 69°.

Pressure29.85 inHg

Wind9.3 mph W

Humidity62%

Visibility6.2 mi

Dew point66°

Wed, 1474° / 63°

0.57

74 °

Eureka, Wednesday, 14 October

Rain. High 74°, low 63°.

Pressure30.03 inHg

Wind7.1 mph N

Humidity71%

Visibility6.2 mi

Dew point62°

Thu, 1559° / 55°

1.42

59 °

Eureka, Thursday, 15 October

Heavy rain. High 59°, low 55°.

Pressure30.18 inHg

Wind11 mph E

Humidity96%

Visibility—

Dew point56°

Fri, 1656° / 40°

56 °

Eureka, Friday, 16 October

Light rain. High 56°, low 40°.

Pressure30.12 inHg

Wind23 mph NW

Humidity48%

Visibility—

Dew point36°

Sat, 1740° / 33°

0.01

40 °

Eureka, Saturday, 17 October

Light snow. High 40°, low 33°.

Pressure30.27 inHg

Wind18.2 mph NW

Humidity58%

Visibility—

Dew point23°

Sun, 1846° / 27°

46 °

Eureka, Sunday, 18 October

Clear. High 46°, low 27°.

Pressure30.59 inHg

Wind13.9 mph N

Humidity33%

Visibility—

Dew point15°

Mon, 1952° / 31°

52 °

Eureka, Monday, 19 October

Overcast. High 52°, low 31°.

Pressure30.62 inHg

Wind12.1 mph S

Humidity36%

Visibility—

Dew point22°

Tue, 2061° / 37°

61 °

Eureka, Tuesday, 20 October

Clear. High 61°, low 37°.

Pressure30.39 inHg

Wind13 mph S

Humidity26%

Visibility—

Dew point21°

Wed, 2168° / 43°

68 °

Eureka, Wednesday, 21 October

Clear. High 68°, low 43°.

Pressure30.27 inHg

Wind14.1 mph S

Humidity27%

Visibility—

Dew point28°

Thu, 2269° / 49°

69 °

Eureka, Thursday, 22 October

Overcast. High 69°, low 49°.

Pressure30.24 inHg

Wind15.2 mph SW

Humidity28%

Visibility—

Dew point30°

Fri, 2351° / 43°

0.02

51 °

Eureka, Friday, 23 October

Light rain. High 51°, low 43°.

Pressure30.21 inHg

Wind13.3 mph NW

Humidity69%

Visibility—

Dew point39°

Sat, 2458° / 45°

58 °

Eureka, Saturday, 24 October

Overcast. High 58°, low 45°.

Pressure30.18 inHg

Wind10.8 mph NE

Humidity69%

Visibility—

Dew point40°

Sun, 2563° / 45°

63 °

Eureka, Sunday, 25 October

Clear. High 63°, low 45°.

Pressure30.12 inHg

Wind13 mph NE

Humidity48%

Visibility—

Dew point40°

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.