As of 12:52 CDT

Weather in Marengo, IL

78°

Marengo, Saturday, 10 October, 12:52

Overcast. Feels like 78°. High 78°, low 58°.

Pressure30.06 inHg

Wind11.8 mph S

Humidity45%

Visibility6.2 mi

Dew point55°

See detailed hourly forecast

Sun, 1174° / 55°

74 °

Marengo, Sunday, 11 October

Clear. High 74°, low 55°.

Pressure29.97 inHg

Wind6.7 mph S

Humidity57%

Visibility6.2 mi

Dew point55°

Mon, 1281° / 61°

81 °

Marengo, Monday, 12 October

Clear. High 81°, low 61°.

Pressure29.83 inHg

Wind11.4 mph SW

Humidity58%

Visibility6.2 mi

Dew point62°

Tue, 1374° / 61°

74 °

Marengo, Tuesday, 13 October

Overcast. High 74°, low 61°.

Pressure29.83 inHg

Wind11.1 mph NW

Humidity70%

Visibility6.2 mi

Dew point64°

Wed, 1463° / 54°

0.04

63 °

Marengo, Wednesday, 14 October

Light rain. High 63°, low 54°.

Pressure30.15 inHg

Wind8.3 mph NE

Humidity71%

Visibility6.2 mi

Dew point53°

Thu, 1559° / 53°

59 °

Marengo, Thursday, 15 October

Overcast. High 59°, low 53°.

Pressure30.33 inHg

Wind12.4 mph E

Humidity62%

Visibility—

Dew point45°

Fri, 1657° / 37°

0.06

57 °

Marengo, Friday, 16 October

Light rain. High 57°, low 37°.

Pressure29.77 inHg

Wind27.2 mph W

Humidity53%

Visibility—

Dew point33°

Sat, 1741° / 32°

41 °

Marengo, Saturday, 17 October

Overcast. High 41°, low 32°.

Pressure30.27 inHg

Wind21.9 mph W

Humidity50%

Visibility—

Dew point23°

Sun, 1846° / 25°

46 °

Marengo, Sunday, 18 October

Mostly clear. High 46°, low 25°.

Pressure30.50 inHg

Wind8.6 mph N

Humidity37%

Visibility—

Dew point17°

Mon, 1955° / 35°

55 °

Marengo, Monday, 19 October

Overcast. High 55°, low 35°.

Pressure30.36 inHg

Wind16.2 mph S

Humidity39%

Visibility—

Dew point26°

Tue, 2058° / 41°

58 °

Marengo, Tuesday, 20 October

Overcast. High 58°, low 41°.

Pressure30.27 inHg

Wind15.4 mph S

Humidity40%

Visibility—

Dew point31°

Wed, 2153° / 49°

0.13

53 °

Marengo, Wednesday, 21 October

Light rain. High 53°, low 49°.

Pressure29.94 inHg

Wind17.1 mph S

Humidity71%

Visibility—

Dew point42°

Thu, 2263° / 42°

63 °

Marengo, Thursday, 22 October

Clear. High 63°, low 42°.

Pressure30.03 inHg

Wind17.2 mph SW

Humidity46%

Visibility—

Dew point37°

Fri, 2355° / 40°

55 °

Marengo, Friday, 23 October

Clear. High 55°, low 40°.

Pressure30.15 inHg

Wind13.2 mph NW

Humidity41%

Visibility—

Dew point28°

Sat, 2455° / 39°

55 °

Marengo, Saturday, 24 October

Overcast. High 55°, low 39°.

Pressure30.21 inHg

Wind8.2 mph E

Humidity39%

Visibility—

Dew point28°

Sun, 2549° / 37°

0.27

49 °

Marengo, Sunday, 25 October

Light rain. High 49°, low 37°.

Pressure29.74 inHg

Wind18.5 mph N

Humidity92%

Visibility—

Dew point46°

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.