As of 17:40 CDT

Weather in Eureka, IL

85°

Eureka, Monday, 12 October, 17:40

Overcast. Feels like 87°. High 87°, low 62°.

Pressure29.77 inHg

Wind12.4 mph S

Humidity53%

Visibility6.2 mi

Dew point66°

See detailed hourly forecast

Tue, 1386° / 65°

0.16

86 °

Eureka, Tuesday, 13 October

Rain. High 86°, low 65°.

Pressure29.85 inHg

Wind7.2 mph W

Humidity65%

Visibility6.2 mi

Dew point66°

Wed, 1475° / 60°

0.61

75 °

Eureka, Wednesday, 14 October

Heavy rain. High 75°, low 60°.

Pressure30.03 inHg

Wind7.1 mph NE

Humidity69%

Visibility6.2 mi

Dew point62°

Thu, 1567° / 60°

1.91

67 °

Eureka, Thursday, 15 October

Heavy rain. High 67°, low 60°.

Pressure30.00 inHg

Wind8.5 mph E

Humidity95%

Visibility1.6 mi

Dew point63°

Fri, 1658° / 48°

0.03

58 °

Eureka, Friday, 16 October

Light rain. High 58°, low 48°.

Pressure30.30 inHg

Wind21.6 mph NW

Humidity51%

Visibility6.2 mi

Dew point37°

Sat, 1759° / 40°

59 °

Eureka, Saturday, 17 October

Clear. High 59°, low 40°.

Pressure30.50 inHg

Wind8.8 mph S

Humidity39%

Visibility—

Dew point30°

Sun, 1863° / 44°

63 °

Eureka, Sunday, 18 October

Clear. High 63°, low 44°.

Pressure30.30 inHg

Wind13.7 mph S

Humidity37%

Visibility—

Dew point32°

Mon, 1969° / 47°

69 °

Eureka, Monday, 19 October

Overcast. High 69°, low 47°.

Pressure30.30 inHg

Wind9 mph S

Humidity44%

Visibility—

Dew point42°

Tue, 2070° / 58°

70 °

Eureka, Tuesday, 20 October

Light rain. High 70°, low 58°.

Pressure30.27 inHg

Wind9.6 mph S

Humidity61%

Visibility—

Dew point54°

Wed, 2175° / 57°

75 °

Eureka, Wednesday, 21 October

Clear. High 75°, low 57°.

Pressure30.18 inHg

Wind10.8 mph S

Humidity55%

Visibility—

Dew point54°

Thu, 2276° / 61°

76 °

Eureka, Thursday, 22 October

Overcast. High 76°, low 61°.

Pressure30.09 inHg

Wind14.9 mph S

Humidity54%

Visibility—

Dew point51°

Fri, 2378° / 66°

78 °

Eureka, Friday, 23 October

Overcast. High 78°, low 66°.

Pressure29.91 inHg

Wind20.6 mph S

Humidity44%

Visibility—

Dew point51°

Sat, 2471° / 49°

0.09

71 °

Eureka, Saturday, 24 October

Light rain. High 71°, low 49°.

Pressure29.80 inHg

Wind20.4 mph SW

Humidity56%

Visibility—

Dew point43°

Sun, 2554° / 45°

54 °

Eureka, Sunday, 25 October

Overcast. High 54°, low 45°.

Pressure30.06 inHg

Wind14 mph NW

Humidity53%

Visibility—

Dew point35°

Mon, 2660° / 42°

60 °

Eureka, Monday, 26 October

Clear. High 60°, low 42°.

Pressure30.18 inHg

Wind6.7 mph E

Humidity49%

Visibility—

Dew point37°

Tue, 2765° / 47°

65 °

Eureka, Tuesday, 27 October

Partly cloudy. High 65°, low 47°.

Pressure29.94 inHg

Wind9.3 mph S

Humidity45%

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.