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As of 06:27 CDT

Weather in Harmon, IL

48°Current weather

Harmon, Thursday, 8 October, 06:27

Partly cloudy. Feels like 48°. High 74°, low 48°.

Pressure30.03 inHg
Wind0 mph N
Humidity91%
Visibility6.2 mi
Dew point46°
Fri, 0973° / 51°0.02Light rain
73 °Light rain

Harmon, Friday, 9 October

Light rain. High 73°, low 51°.

Pressure30.09 inHg
Wind8.1 mph SE
Humidity61%
Visibility6.2 mi
Dew point52°
Sat, 1079° / 61°0Overcast
79 °Overcast

Harmon, Saturday, 10 October

Overcast. High 79°, low 61°.

Pressure30.06 inHg
Wind10.2 mph S
Humidity50%
Visibility6.2 mi
Dew point58°
Sun, 1175° / 57°0Clear
75 °Clear

Harmon, Sunday, 11 October

Clear. High 75°, low 57°.

Pressure30.00 inHg
Wind5 mph SE
Humidity57%
Visibility6.2 mi
Dew point55°
Mon, 1283° / 57°0Clear
83 °Clear

Harmon, Monday, 12 October

Clear. High 83°, low 57°.

Pressure29.83 inHg
Wind11 mph S
Humidity51%
Visibility—
Dew point57°
Tue, 1371° / 55°0Overcast
71 °Overcast

Harmon, Tuesday, 13 October

Overcast. High 71°, low 55°.

Pressure29.94 inHg
Wind11.2 mph N
Humidity58%
Visibility—
Dew point53°
Wed, 1465° / 47°0Overcast
65 °Overcast

Harmon, Wednesday, 14 October

Overcast. High 65°, low 47°.

Pressure30.06 inHg
Wind17.8 mph SE
Humidity51%
Visibility—
Dew point41°
Thu, 1588° / 62°0.24Rain
88 °Rain

Harmon, Thursday, 15 October

Rain. High 88°, low 62°.

Pressure29.77 inHg
Wind20.3 mph SW
Humidity55%
Visibility—
Dew point64°
Fri, 1672° / 53°0.04Light rain
72 °Light rain

Harmon, Friday, 16 October

Light rain. High 72°, low 53°.

Pressure30.12 inHg
Wind16.7 mph NW
Humidity51%
Visibility—
Dew point45°
Sat, 1758° / 45°0Overcast
58 °Overcast

Harmon, Saturday, 17 October

Overcast. High 58°, low 45°.

Pressure30.45 inHg
Wind11.4 mph NE
Humidity58%
Visibility—
Dew point41°
Sun, 1864° / 51°0.01Light rain
64 °Light rain

Harmon, Sunday, 18 October

Light rain. High 64°, low 51°.

Pressure30.24 inHg
Wind5.7 mph E
Humidity54%
Visibility—
Dew point44°
Mon, 1957° / 54°0.35Rain
57 °Rain

Harmon, Monday, 19 October

Rain. High 57°, low 54°.

Pressure30.18 inHg
Wind6.7 mph SE
Humidity91%
Visibility—
Dew point54°
Tue, 2065° / 58°0.01Light rain
65 °Light rain

Harmon, Tuesday, 20 October

Light rain. High 65°, low 58°.

Pressure30.12 inHg
Wind5.4 mph NW
Humidity82%
Visibility—
Dew point55°
Wed, 2168° / 53°0Mostly clear
68 °Mostly clear

Harmon, Wednesday, 21 October

Mostly clear. High 68°, low 53°.

Pressure29.97 inHg
Wind7.2 mph SE
Humidity57%
Visibility—
Dew point49°
Thu, 2273° / 54°0.12Light rain
73 °Light rain

Harmon, Thursday, 22 October

Light rain. High 73°, low 54°.

Pressure29.68 inHg
Wind18 mph S
Humidity54%
Visibility—
Dew point50°
Fri, 2379° / 61°0Clear
79 °Clear

Harmon, Friday, 23 October

Clear. High 79°, low 61°.

Pressure29.77 inHg
Wind14.2 mph S
Humidity57%
Visibility—
Dew point59°

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 Harmon, 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 Harmon, 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.