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As of 03:03 CDT

Weather in Harristown, IL

48°Current weather

Harristown, Thursday, 22 October, 03:03

Clear. Feels like 48°. High 75°, low 47°.

Pressure30.21 inHg
Wind1.4 mph E
Humidity87%
Visibility6.2 mi
Dew point44°
Fri, 2372° / 46°0Clear
72 °Clear

Harristown, Friday, 23 October

Clear. High 72°, low 46°.

Pressure30.30 inHg
Wind6.8 mph SE
Humidity43%
Visibility6.2 mi
Dew point46°
Sat, 2471° / 50°0Overcast
71 °Overcast

Harristown, Saturday, 24 October

Overcast. High 71°, low 50°.

Pressure30.36 inHg
Wind6.4 mph SE
Humidity48%
Visibility6.2 mi
Dew point48°
Sun, 2573° / 50°0Partly cloudy
73 °Partly cloudy

Harristown, Sunday, 25 October

Partly cloudy. High 73°, low 50°.

Pressure30.39 inHg
Wind4.3 mph S
Humidity48%
Visibility6.2 mi
Dew point48°
Mon, 2673° / 52°0Overcast
73 °Overcast

Harristown, Monday, 26 October

Overcast. High 73°, low 52°.

Pressure30.33 inHg
Wind5 mph S
Humidity43%
Visibility—
Dew point45°
Tue, 2771° / 52°0Overcast
71 °Overcast

Harristown, Tuesday, 27 October

Overcast. High 71°, low 52°.

Pressure30.18 inHg
Wind10.2 mph W
Humidity41%
Visibility—
Dew point44°
Wed, 2856° / 44°0.02Light rain
56 °Light rain

Harristown, Wednesday, 28 October

Light rain. High 56°, low 44°.

Pressure30.27 inHg
Wind15.2 mph NW
Humidity80%
Visibility—
Dew point41°
Thu, 2957° / 36°0Clear
57 °Clear

Harristown, Thursday, 29 October

Clear. High 57°, low 36°.

Pressure30.33 inHg
Wind9 mph N
Humidity35%
Visibility—
Dew point25°
Fri, 3063° / 40°0Mostly clear
63 °Mostly clear

Harristown, Friday, 30 October

Mostly clear. High 63°, low 40°.

Pressure30.18 inHg
Wind13.1 mph S
Humidity28%
Visibility—
Dew point26°
Sat, 3168° / 50°0Overcast
68 °Overcast

Harristown, Saturday, 31 October

Overcast. High 68°, low 50°.

Pressure30.06 inHg
Wind19.1 mph S
Humidity41%
Visibility—
Dew point40°
Sun, 0162° / 54°0.67Rain
62 °Rain

Harristown, Sunday, 1 November

Rain. High 62°, low 54°.

Pressure29.97 inHg
Wind23.9 mph S
Humidity89%
Visibility—
Dew point52°
Mon, 0259° / 44°0.13Light rain
59 °Light rain

Harristown, Monday, 2 November

Light rain. High 59°, low 44°.

Pressure30.18 inHg
Wind18.3 mph NW
Humidity39%
Visibility—
Dew point31°
Tue, 0353° / 37°0Overcast
53 °Overcast

Harristown, Tuesday, 3 November

Overcast. High 53°, low 37°.

Pressure30.33 inHg
Wind9.7 mph W
Humidity30%
Visibility—
Dew point19°
Wed, 0454° / 48°0.01Light rain
54 °Light rain

Harristown, Wednesday, 4 November

Light rain. High 54°, low 48°.

Pressure29.88 inHg
Wind20.6 mph S
Humidity65%
Visibility—
Dew point41°
Thu, 0558° / 42°0.02Light rain
58 °Light rain

Harristown, Thursday, 5 November

Light rain. High 58°, low 42°.

Pressure29.74 inHg
Wind23.8 mph NW
Humidity37%
Visibility—
Dew point31°
Fri, 0646° / 36°0Overcast
46 °Overcast

Harristown, Friday, 6 November

Overcast. High 46°, low 36°.

Pressure30.09 inHg
Wind6.4 mph NW
Humidity42%
Visibility—
Dew point23°

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.