As of 16:38 CDT

Weather in Marengo, IL

84°

Marengo, Monday, 12 October, 16:38

Overcast. Feels like 87°. High 85°, low 61°.

Pressure29.71 inHg

Wind13 mph SW

Humidity57%

Visibility6.2 mi

Dew point68°

See detailed hourly forecast

Tue, 1379° / 63°

0.39

79 °

Marengo, Tuesday, 13 October

Heavy rain. High 79°, low 63°.

Pressure29.85 inHg

Wind8.7 mph W

Humidity65%

Visibility6.2 mi

Dew point59°

Wed, 1470° / 57°

0.07

70 °

Marengo, Wednesday, 14 October

Rain. High 70°, low 57°.

Pressure30.09 inHg

Wind6.8 mph NE

Humidity60%

Visibility6.2 mi

Dew point55°

Thu, 1559° / 56°

0.51

59 °

Marengo, Thursday, 15 October

Rain. High 59°, low 56°.

Pressure30.09 inHg

Wind8.1 mph E

Humidity95%

Visibility1.6 mi

Dew point56°

Fri, 1655° / 45°

0.05

55 °

Marengo, Friday, 16 October

Light rain. High 55°, low 45°.

Pressure30.24 inHg

Wind24.2 mph NW

Humidity54%

Visibility6.2 mi

Dew point37°

Sat, 1758° / 36°

58 °

Marengo, Saturday, 17 October

Clear. High 58°, low 36°.

Pressure30.45 inHg

Wind11.9 mph SW

Humidity38%

Visibility—

Dew point29°

Sun, 1859° / 43°

59 °

Marengo, Sunday, 18 October

Clear. High 59°, low 43°.

Pressure30.27 inHg

Wind16.9 mph SW

Humidity43%

Visibility—

Dew point34°

Mon, 1963° / 44°

63 °

Marengo, Monday, 19 October

Overcast. High 63°, low 44°.

Pressure30.30 inHg

Wind8.8 mph S

Humidity44%

Visibility—

Dew point38°

Tue, 2066° / 53°

66 °

Marengo, Tuesday, 20 October

Overcast. High 66°, low 53°.

Pressure30.27 inHg

Wind6.4 mph S

Humidity68%

Visibility—

Dew point51°

Wed, 2172° / 55°

72 °

Marengo, Wednesday, 21 October

Partly cloudy. High 72°, low 55°.

Pressure30.18 inHg

Wind10.1 mph S

Humidity64%

Visibility—

Dew point55°

Thu, 2269° / 60°

0.05

69 °

Marengo, Thursday, 22 October

Light rain. High 69°, low 60°.

Pressure30.09 inHg

Wind16.5 mph S

Humidity60%

Visibility—

Dew point54°

Fri, 2373° / 63°

0.06

73 °

Marengo, Friday, 23 October

Light rain. High 73°, low 63°.

Pressure29.88 inHg

Wind19.8 mph SW

Humidity53%

Visibility—

Dew point54°

Sat, 2467° / 45°

0.04

67 °

Marengo, Saturday, 24 October

Light rain. High 67°, low 45°.

Pressure29.71 inHg

Wind21.9 mph SW

Humidity66%

Visibility—

Dew point42°

Sun, 2550° / 42°

50 °

Marengo, Sunday, 25 October

Partly cloudy. High 50°, low 42°.

Pressure30.06 inHg

Wind13.5 mph NW

Humidity64%

Visibility—

Dew point38°

Mon, 2657° / 41°

57 °

Marengo, Monday, 26 October

Clear. High 57°, low 41°.

Pressure30.21 inHg

Wind6.4 mph E

Humidity54%

Visibility—

Dew point37°

Tue, 2761° / 46°

61 °

Marengo, Tuesday, 27 October

Overcast. High 61°, low 46°.

Pressure29.94 inHg

Wind9.7 mph SW

Humidity55%

Visibility—

Dew point42°

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 Marengo, 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 Marengo, 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.