EN
English Español

As of 15:33 CDT

Weather in Harrison, IL

84°Current weather

Harrison, Thursday, 8 October, 15:33

Clear. Feels like 82°. High 85°, low 54°.

Pressure30.06 inHg
Wind0 mph N
Humidity22%
Visibility6.2 mi
Dew point41°
Fri, 0986° / 53°0Clear
86 °Clear

Harrison, Friday, 9 October

Clear. High 86°, low 53°.

Pressure30.12 inHg
Wind6 mph SE
Humidity37%
Visibility6.2 mi
Dew point52°
Sat, 1072° / 56°0.02Light rain
72 °Light rain

Harrison, Saturday, 10 October

Light rain. High 72°, low 56°.

Pressure30.06 inHg
Wind4.7 mph NE
Humidity56%
Visibility6.2 mi
Dew point54°
Sun, 1179° / 60°0Clear
79 °Clear

Harrison, Sunday, 11 October

Clear. High 79°, low 60°.

Pressure29.97 inHg
Wind9 mph NW
Humidity60%
Visibility6.2 mi
Dew point58°
Mon, 1290° / 62°0Clear
90 °Clear

Harrison, Monday, 12 October

Clear. High 90°, low 62°.

Pressure29.97 inHg
Wind8.9 mph SW
Humidity46%
Visibility6.2 mi
Dew point61°
Tue, 1391° / 67°0.05Light rain
91 °Light rain

Harrison, Tuesday, 13 October

Light rain. High 91°, low 67°.

Pressure29.88 inHg
Wind10.6 mph SW
Humidity50%
Visibility—
Dew point64°
Wed, 1488° / 68°0.01Light rain
88 °Light rain

Harrison, Wednesday, 14 October

Light rain. High 88°, low 68°.

Pressure29.91 inHg
Wind14 mph S
Humidity66%
Visibility—
Dew point64°
Thu, 1594° / 75°0Clear
94 °Clear

Harrison, Thursday, 15 October

Clear. High 94°, low 75°.

Pressure30.00 inHg
Wind14.9 mph S
Humidity39%
Visibility—
Dew point63°
Fri, 1683° / 63°0.04Light rain
83 °Light rain

Harrison, Friday, 16 October

Light rain. High 83°, low 63°.

Pressure30.15 inHg
Wind17.5 mph N
Humidity59%
Visibility—
Dew point66°
Sat, 1764° / 49°0Overcast
64 °Overcast

Harrison, Saturday, 17 October

Overcast. High 64°, low 49°.

Pressure30.42 inHg
Wind15.2 mph N
Humidity31%
Visibility—
Dew point31°
Sun, 1863° / 41°0Clear
63 °Clear

Harrison, Sunday, 18 October

Clear. High 63°, low 41°.

Pressure30.50 inHg
Wind11.7 mph NE
Humidity21%
Visibility—
Dew point19°
Mon, 1970° / 40°0Clear
70 °Clear

Harrison, Monday, 19 October

Clear. High 70°, low 40°.

Pressure30.42 inHg
Wind7.7 mph E
Humidity25%
Visibility—
Dew point27°
Tue, 2073° / 48°0Clear
73 °Clear

Harrison, Tuesday, 20 October

Clear. High 73°, low 48°.

Pressure30.27 inHg
Wind10.9 mph S
Humidity26%
Visibility—
Dew point32°
Wed, 2176° / 53°0.05Light rain
76 °Light rain

Harrison, Wednesday, 21 October

Light rain. High 76°, low 53°.

Pressure30.12 inHg
Wind12.3 mph SW
Humidity38%
Visibility—
Dew point46°
Thu, 2277° / 55°0.02Light rain
77 °Light rain

Harrison, Thursday, 22 October

Light rain. High 77°, low 55°.

Pressure30.18 inHg
Wind6.7 mph NW
Humidity38%
Visibility—
Dew point45°
Fri, 2379° / 53°0Overcast
79 °Overcast

Harrison, Friday, 23 October

Overcast. High 79°, low 53°.

Pressure30.18 inHg
Wind4.4 mph NE
Humidity29%
Visibility—
Dew point40°

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.