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As of 14:28 CDT

Weather in Harristown, IL

75°Current weather

Harristown, Wednesday, 28 October, 14:28

Clear. Feels like 74°. High 75°, low 51°.

Pressure30.15 inHg
Wind10.4 mph SW
Humidity41%
Visibility6.2 mi
Dew point51°
Thu, 2978° / 52°0Overcast
78 °Overcast

Harristown, Thursday, 29 October

Overcast. High 78°, low 52°.

Pressure30.15 inHg
Wind9.1 mph SW
Humidity55%
Visibility6.2 mi
Dew point55°
Fri, 3073° / 51°0.04Light rain
73 °Light rain

Harristown, Friday, 30 October

Light rain. High 73°, low 51°.

Pressure30.27 inHg
Wind8.8 mph E
Humidity59%
Visibility6.2 mi
Dew point53°
Sat, 3169° / 58°0Overcast
69 °Overcast

Harristown, Saturday, 31 October

Overcast. High 69°, low 58°.

Pressure30.27 inHg
Wind4.9 mph S
Humidity61%
Visibility6.2 mi
Dew point53°
Sun, 0172° / 57°0Partly cloudy
72 °Partly cloudy

Harristown, Sunday, 1 November

Partly cloudy. High 72°, low 57°.

Pressure30.27 inHg
Wind6.7 mph E
Humidity57%
Visibility6.2 mi
Dew point52°
Mon, 0269° / 57°0.04Light rain
69 °Light rain

Harristown, Monday, 2 November

Light rain. High 69°, low 57°.

Pressure30.12 inHg
Wind13.2 mph SE
Humidity60%
Visibility—
Dew point53°
Tue, 0362° / 60°0.35Rain
62 °Rain

Harristown, Tuesday, 3 November

Rain. High 62°, low 60°.

Pressure29.83 inHg
Wind14.1 mph SE
Humidity93%
Visibility—
Dew point59°
Wed, 0461° / 59°0.98Rain
61 °Rain

Harristown, Wednesday, 4 November

Rain. High 61°, low 59°.

Pressure29.71 inHg
Wind16.6 mph SE
Humidity90%
Visibility—
Dew point58°
Thu, 0560° / 55°0.56Rain
60 °Rain

Harristown, Thursday, 5 November

Rain. High 60°, low 55°.

Pressure29.59 inHg
Wind13.6 mph N
Humidity95%
Visibility—
Dew point59°
Fri, 0655° / 46°0Partly cloudy
55 °Partly cloudy

Harristown, Friday, 6 November

Partly cloudy. High 55°, low 46°.

Pressure29.97 inHg
Wind14.4 mph N
Humidity41%
Visibility—
Dew point31°
Sat, 0753° / 42°0Overcast
53 °Overcast

Harristown, Saturday, 7 November

Overcast. High 53°, low 42°.

Pressure30.27 inHg
Wind6.4 mph NE
Humidity50%
Visibility—
Dew point33°
Sun, 0853° / 39°0Overcast
53 °Overcast

Harristown, Sunday, 8 November

Overcast. High 53°, low 39°.

Pressure30.36 inHg
Wind7.9 mph SE
Humidity44%
Visibility—
Dew point29°
Mon, 0955° / 39°0Overcast
55 °Overcast

Harristown, Monday, 9 November

Overcast. High 55°, low 39°.

Pressure30.12 inHg
Wind13.1 mph SE
Humidity44%
Visibility—
Dew point31°
Tue, 1054° / 48°0.73Rain
54 °Rain

Harristown, Tuesday, 10 November

Rain. High 54°, low 48°.

Pressure29.80 inHg
Wind18.5 mph SE
Humidity87%
Visibility—
Dew point48°
Wed, 1149° / 43°0.68Rain
49 °Rain

Harristown, Wednesday, 11 November

Rain. High 49°, low 43°.

Pressure29.91 inHg
Wind19.1 mph NE
Humidity87%
Visibility—
Dew point44°
Thu, 1244° / 42°0.02Light rain
44 °Light rain

Harristown, Thursday, 12 November

Light rain. High 44°, low 42°.

Pressure30.03 inHg
Wind15.6 mph N
Humidity79%
Visibility—
Dew point38°

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 Harristown, 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 Harristown, 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.