As of 02:58 CDT

Weather in Eureka, IL

64°

Eureka, Monday, 12 October, 02:58

Partly cloudy. Feels like 64°. High 86°, low 61°.

Pressure29.91 inHg

Wind9.3 mph S

Humidity83%

Visibility6.2 mi

Dew point59°

See detailed hourly forecast

Tue, 1384° / 69°

0.03

84 °

Eureka, Tuesday, 13 October

Light rain. High 84°, low 69°.

Pressure29.85 inHg

Wind8.9 mph W

Humidity62%

Visibility6.2 mi

Dew point66°

Wed, 1474° / 64°

0.1

74 °

Eureka, Wednesday, 14 October

Rain. High 74°, low 64°.

Pressure30.06 inHg

Wind6.2 mph NE

Humidity74%

Visibility6.2 mi

Dew point64°

Thu, 1570° / 61°

70 °

Eureka, Thursday, 15 October

Rain. High 70°, low 61°.

Pressure30.00 inHg

Wind2.9 mph SE

Humidity95%

Visibility1.6 mi

Dew point65°

Fri, 1660° / 49°

0.15

60 °

Eureka, Friday, 16 October

Rain. High 60°, low 49°.

Pressure30.39 inHg

Wind20.8 mph N

Humidity45%

Visibility—

Dew point37°

Sat, 1757° / 42°

57 °

Eureka, Saturday, 17 October

Clear. High 57°, low 42°.

Pressure30.50 inHg

Wind8.9 mph S

Humidity41%

Visibility—

Dew point31°

Sun, 1862° / 37°

62 °

Eureka, Sunday, 18 October

Clear. High 62°, low 37°.

Pressure30.39 inHg

Wind15.7 mph SW

Humidity24%

Visibility—

Dew point19°

Mon, 1969° / 47°

69 °

Eureka, Monday, 19 October

Overcast. High 69°, low 47°.

Pressure30.30 inHg

Wind14.4 mph S

Humidity40%

Visibility—

Dew point40°

Tue, 2074° / 56°

74 °

Eureka, Tuesday, 20 October

Partly cloudy. High 74°, low 56°.

Pressure30.15 inHg

Wind13.4 mph S

Humidity50%

Visibility—

Dew point51°

Wed, 2179° / 61°

0.05

79 °

Eureka, Wednesday, 21 October

Light rain. High 79°, low 61°.

Pressure29.97 inHg

Wind21.5 mph S

Humidity58%

Visibility—

Dew point58°

Thu, 2268° / 52°

0.71

68 °

Eureka, Thursday, 22 October

Rain. High 68°, low 52°.

Pressure29.80 inHg

Wind21.8 mph S

Humidity51%

Visibility—

Dew point43°

Fri, 2350° / 44°

50 °

Eureka, Friday, 23 October

Clear. High 50°, low 44°.

Pressure30.03 inHg

Wind17.9 mph NW

Humidity49%

Visibility—

Dew point31°

Sat, 2453° / 36°

53 °

Eureka, Saturday, 24 October

Partly cloudy. High 53°, low 36°.

Pressure30.15 inHg

Wind7.5 mph NW

Humidity40%

Visibility—

Dew point26°

Sun, 2554° / 46°

0.22

54 °

Eureka, Sunday, 25 October

Light rain. High 54°, low 46°.

Pressure29.74 inHg

Wind13.4 mph SE

Humidity51%

Visibility—

Dew point35°

Mon, 2654° / 47°

54 °

Eureka, Monday, 26 October

Overcast. High 54°, low 47°.

Pressure30.00 inHg

Wind10.8 mph NE

Humidity67%

Visibility—

Dew point42°

Tue, 2755° / 45°

55 °

Eureka, Tuesday, 27 October

Clear. High 55°, low 45°.

Pressure30.03 inHg

Wind12.7 mph NW

Humidity48%

Visibility—

Dew point34°

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.