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As of 08:40 CDT

Weather in Dennison, IL

57°Current weather

Dennison, Thursday, 8 October, 08:40

Clear. Feels like 57°. High 80°, low 52°.

Pressure30.06 inHg
Wind0.7 mph NW
Humidity99%
Visibility6.2 mi
Dew point57°
Fri, 0985° / 50°0Clear
85 °Clear

Dennison, Friday, 9 October

Clear. High 85°, low 50°.

Pressure30.18 inHg
Wind8.5 mph S
Humidity30%
Visibility6.2 mi
Dew point45°
Sat, 1080° / 57°0Overcast
80 °Overcast

Dennison, Saturday, 10 October

Overcast. High 80°, low 57°.

Pressure30.12 inHg
Wind7.4 mph SE
Humidity38%
Visibility6.2 mi
Dew point50°
Sun, 1172° / 58°0.2Rain
72 °Rain

Dennison, Sunday, 11 October

Rain. High 72°, low 58°.

Pressure29.91 inHg
Wind6.4 mph N
Humidity89%
Visibility3.4 mi
Dew point60°
Mon, 1285° / 57°0Clear
85 °Clear

Dennison, Monday, 12 October

Clear. High 85°, low 57°.

Pressure29.91 inHg
Wind10.7 mph SW
Humidity42%
Visibility—
Dew point55°
Tue, 1388° / 69°0Clear
88 °Clear

Dennison, Tuesday, 13 October

Clear. High 88°, low 69°.

Pressure29.85 inHg
Wind10.8 mph SW
Humidity39%
Visibility—
Dew point56°
Wed, 1481° / 58°0.02Light rain
81 °Light rain

Dennison, Wednesday, 14 October

Light rain. High 81°, low 58°.

Pressure30.00 inHg
Wind14 mph SE
Humidity49%
Visibility—
Dew point52°
Thu, 1594° / 69°0Mostly clear
94 °Mostly clear

Dennison, Thursday, 15 October

Mostly clear. High 94°, low 69°.

Pressure29.94 inHg
Wind18.2 mph SW
Humidity36%
Visibility—
Dew point60°
Fri, 1680° / 58°0.59Rain
80 °Rain

Dennison, Friday, 16 October

Rain. High 80°, low 58°.

Pressure30.18 inHg
Wind16.3 mph NW
Humidity68%
Visibility—
Dew point58°
Sat, 1761° / 48°0Mostly clear
61 °Mostly clear

Dennison, Saturday, 17 October

Mostly clear. High 61°, low 48°.

Pressure30.53 inHg
Wind17.9 mph NE
Humidity40%
Visibility—
Dew point35°
Sun, 1864° / 41°0Overcast
64 °Overcast

Dennison, Sunday, 18 October

Overcast. High 64°, low 41°.

Pressure30.45 inHg
Wind10.5 mph E
Humidity30%
Visibility—
Dew point26°
Mon, 1965° / 51°0.01Light rain
65 °Light rain

Dennison, Monday, 19 October

Light rain. High 65°, low 51°.

Pressure30.27 inHg
Wind13.9 mph S
Humidity55%
Visibility—
Dew point44°
Tue, 2076° / 60°0.04Light rain
76 °Light rain

Dennison, Tuesday, 20 October

Light rain. High 76°, low 60°.

Pressure30.18 inHg
Wind13.1 mph S
Humidity58%
Visibility—
Dew point56°
Wed, 2177° / 57°0.03Light rain
77 °Light rain

Dennison, Wednesday, 21 October

Light rain. High 77°, low 57°.

Pressure30.09 inHg
Wind10.3 mph SW
Humidity54%
Visibility—
Dew point55°
Thu, 2275° / 54°0.06Light rain
75 °Light rain

Dennison, Thursday, 22 October

Light rain. High 75°, low 54°.

Pressure29.91 inHg
Wind19 mph SW
Humidity50%
Visibility—
Dew point53°
Fri, 2363° / 44°0Clear
63 °Clear

Dennison, Friday, 23 October

Clear. High 63°, low 44°.

Pressure30.18 inHg
Wind10.4 mph NW
Humidity34%
Visibility—
Dew point30°

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 Dennison, 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 Dennison, 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.