As of 02:21 CDT

Weather in Marengo, IL

52°

Marengo, Friday, 16 October, 02:21

Overcast. Feels like 51°. High 54°, low 45°.

Pressure29.85 inHg

Wind18.6 mph NW

Humidity87%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Sat, 1755° / 36°

55 °

Marengo, Saturday, 17 October

Clear. High 55°, low 36°.

Pressure30.53 inHg

Wind6.1 mph SW

Humidity47%

Visibility6.2 mi

Dew point30°

Sun, 1861° / 41°

61 °

Marengo, Sunday, 18 October

Clear. High 61°, low 41°.

Pressure30.45 inHg

Wind14.4 mph SW

Humidity47%

Visibility6.2 mi

Dew point37°

Mon, 1963° / 41°

63 °

Marengo, Monday, 19 October

Overcast. High 63°, low 41°.

Pressure30.39 inHg

Wind5.8 mph S

Humidity54%

Visibility6.2 mi

Dew point42°

Tue, 2066° / 45°

66 °

Marengo, Tuesday, 20 October

Overcast. High 66°, low 45°.

Pressure30.33 inHg

Wind6 mph SE

Humidity46%

Visibility—

Dew point41°

Wed, 2168° / 45°

68 °

Marengo, Wednesday, 21 October

Clear. High 68°, low 45°.

Pressure30.30 inHg

Wind6.8 mph S

Humidity42%

Visibility—

Dew point41°

Thu, 2270° / 52°

70 °

Marengo, Thursday, 22 October

Overcast. High 70°, low 52°.

Pressure30.24 inHg

Wind9.2 mph S

Humidity38%

Visibility—

Dew point40°

Fri, 2370° / 56°

70 °

Marengo, Friday, 23 October

Mostly clear. High 70°, low 56°.

Pressure30.18 inHg

Wind10.6 mph S

Humidity39%

Visibility—

Dew point42°

Sat, 2468° / 54°

68 °

Marengo, Saturday, 24 October

Overcast. High 68°, low 54°.

Pressure30.21 inHg

Wind11.3 mph SE

Humidity41%

Visibility—

Dew point41°

Sun, 2570° / 53°

70 °

Marengo, Sunday, 25 October

Partly cloudy. High 70°, low 53°.

Pressure30.27 inHg

Wind7.5 mph E

Humidity34%

Visibility—

Dew point38°

Mon, 2665° / 53°

65 °

Marengo, Monday, 26 October

Overcast. High 65°, low 53°.

Pressure30.06 inHg

Wind12.3 mph SE

Humidity49%

Visibility—

Dew point43°

Tue, 2759° / 47°

59 °

Marengo, Tuesday, 27 October

Overcast. High 59°, low 47°.

Pressure30.00 inHg

Wind15.3 mph S

Humidity71%

Visibility—

Dew point44°

Wed, 2853° / 47°

0.8

53 °

Marengo, Wednesday, 28 October

Rain. High 53°, low 47°.

Pressure29.71 inHg

Wind13.4 mph SE

Humidity84%

Visibility—

Dew point46°

Thu, 2955° / 48°

55 °

Marengo, Thursday, 29 October

Overcast. High 55°, low 48°.

Pressure29.83 inHg

Wind13.4 mph NW

Humidity83%

Visibility—

Dew point49°

Fri, 3057° / 43°

57 °

Marengo, Friday, 30 October

Clear. High 57°, low 43°.

Pressure29.97 inHg

Wind16 mph W

Humidity46%

Visibility—

Dew point35°

Sat, 3158° / 40°

58 °

Marengo, Saturday, 31 October

Partly cloudy. High 58°, low 40°.

Pressure29.97 inHg

Wind7 mph SW

Humidity45%

Visibility—

Dew point35°

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.