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As of 15:50 CDT

Weather in Harrison, IL

88°Current weather

Harrison, Friday, 9 October, 15:50

Clear. Feels like 85°. High 88°, low 53°.

Pressure30.03 inHg
Wind9.2 mph S
Humidity23%
Visibility6.2 mi
Dew point46°
Sat, 1075° / 55°0Overcast
75 °Overcast

Harrison, Saturday, 10 October

Overcast. High 75°, low 55°.

Pressure30.06 inHg
Wind4.7 mph NE
Humidity60%
Visibility6.2 mi
Dew point54°
Sun, 1182° / 54°0Clear
82 °Clear

Harrison, Sunday, 11 October

Clear. High 82°, low 54°.

Pressure29.97 inHg
Wind4.5 mph NW
Humidity57%
Visibility6.2 mi
Dew point59°
Mon, 1289° / 64°0Clear
89 °Clear

Harrison, Monday, 12 October

Clear. High 89°, low 64°.

Pressure29.94 inHg
Wind10.4 mph SW
Humidity44%
Visibility6.2 mi
Dew point61°
Tue, 1391° / 69°0Clear
91 °Clear

Harrison, Tuesday, 13 October

Clear. High 91°, low 69°.

Pressure29.91 inHg
Wind9.4 mph SW
Humidity53%
Visibility6.2 mi
Dew point66°
Wed, 1477° / 71°0.36Rain
77 °Rain

Harrison, Wednesday, 14 October

Rain. High 77°, low 71°.

Pressure30.00 inHg
Wind7.8 mph SW
Humidity95%
Visibility—
Dew point74°
Thu, 1592° / 67°0.74Heavy rain
92 °Heavy rain

Harrison, Thursday, 15 October

Heavy rain. High 92°, low 67°.

Pressure29.94 inHg
Wind17.2 mph SW
Humidity41%
Visibility—
Dew point62°
Fri, 1671° / 55°0.07Light rain
71 °Light rain

Harrison, Friday, 16 October

Light rain. High 71°, low 55°.

Pressure30.15 inHg
Wind16.6 mph NW
Humidity32%
Visibility—
Dew point34°
Sat, 1752° / 41°0Clear
52 °Clear

Harrison, Saturday, 17 October

Clear. High 52°, low 41°.

Pressure30.39 inHg
Wind18.8 mph NW
Humidity37%
Visibility—
Dew point26°
Sun, 1857° / 34°0Overcast
57 °Overcast

Harrison, Sunday, 18 October

Overcast. High 57°, low 34°.

Pressure30.47 inHg
Wind6.2 mph N
Humidity35%
Visibility—
Dew point24°
Mon, 1963° / 39°0Overcast
63 °Overcast

Harrison, Monday, 19 October

Overcast. High 63°, low 39°.

Pressure30.39 inHg
Wind5.4 mph SE
Humidity27%
Visibility—
Dew point24°
Tue, 2069° / 43°0Clear
69 °Clear

Harrison, Tuesday, 20 October

Clear. High 69°, low 43°.

Pressure30.39 inHg
Wind4.4 mph E
Humidity25%
Visibility—
Dew point28°
Wed, 2172° / 46°0Clear
72 °Clear

Harrison, Wednesday, 21 October

Clear. High 72°, low 46°.

Pressure30.33 inHg
Wind4.7 mph S
Humidity25%
Visibility—
Dew point30°
Thu, 2276° / 49°0Clear
76 °Clear

Harrison, Thursday, 22 October

Clear. High 76°, low 49°.

Pressure30.18 inHg
Wind6.7 mph SW
Humidity29%
Visibility—
Dew point36°
Fri, 2377° / 52°0Clear
77 °Clear

Harrison, Friday, 23 October

Clear. High 77°, low 52°.

Pressure30.06 inHg
Wind7.6 mph SW
Humidity28%
Visibility—
Dew point38°
Sat, 2478° / 53°0Partly cloudy
78 °Partly cloudy

Harrison, Saturday, 24 October

Partly cloudy. High 78°, low 53°.

Pressure30.09 inHg
Wind10.2 mph SW
Humidity25%
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 Harrison, 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 Harrison, 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.