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As of 14:57 CDT

Weather in Dennison, IL

90°Current weather

Dennison, Saturday, 8 August, 14:57

Mostly clear. Feels like 102°. High 90°, low 72°.

Pressure30.00 inHg
Wind2 mph SW
Humidity66%
Visibility6.2 mi
Dew point77°
Sun, 0992° / 72°0Mostly clear
92 °Mostly clear

Dennison, Sunday, 9 August

Mostly clear. High 92°, low 72°.

Pressure30.00 inHg
Wind12.2 mph SW
Humidity72%
Visibility6.2 mi
Dew point75°
Mon, 1090° / 75°0Mostly clear
90 °Mostly clear

Dennison, Monday, 10 August

Mostly clear. High 90°, low 75°.

Pressure29.97 inHg
Wind12.5 mph SW
Humidity69%
Visibility6.2 mi
Dew point75°
Tue, 1191° / 74°0.02Light rain
91 °Light rain

Dennison, Tuesday, 11 August

Light rain. High 91°, low 74°.

Pressure29.88 inHg
Wind15.3 mph SW
Humidity66%
Visibility6.2 mi
Dew point75°
Wed, 1287° / 70°0.2Light rain
87 °Light rain

Dennison, Wednesday, 12 August

Light rain. High 87°, low 70°.

Pressure29.83 inHg
Wind5.8 mph N
Humidity74%
Visibility6.2 mi
Dew point76°
Thu, 1379° / 67°0.44Rain
79 °Rain

Dennison, Thursday, 13 August

Rain. High 79°, low 67°.

Pressure29.88 inHg
Wind10.8 mph W
Humidity79%
Visibility—
Dew point71°
Fri, 1473° / 59°0.01Light rain
73 °Light rain

Dennison, Friday, 14 August

Light rain. High 73°, low 59°.

Pressure30.15 inHg
Wind12.4 mph NE
Humidity57%
Visibility—
Dew point55°
Sat, 1575° / 53°0Partly cloudy
75 °Partly cloudy

Dennison, Saturday, 15 August

Partly cloudy. High 75°, low 53°.

Pressure30.30 inHg
Wind7.1 mph E
Humidity59%
Visibility—
Dew point55°
Sun, 1677° / 57°0Overcast
77 °Overcast

Dennison, Sunday, 16 August

Overcast. High 77°, low 57°.

Pressure30.24 inHg
Wind8.7 mph S
Humidity60%
Visibility—
Dew point58°
Mon, 1782° / 66°0.13Light rain
82 °Light rain

Dennison, Monday, 17 August

Light rain. High 82°, low 66°.

Pressure30.00 inHg
Wind13.1 mph S
Humidity78%
Visibility—
Dew point72°
Tue, 1883° / 71°0.04Light rain
83 °Light rain

Dennison, Tuesday, 18 August

Light rain. High 83°, low 71°.

Pressure29.97 inHg
Wind9.9 mph NE
Humidity75%
Visibility—
Dew point72°
Wed, 1986° / 68°0Partly cloudy
86 °Partly cloudy

Dennison, Wednesday, 19 August

Partly cloudy. High 86°, low 68°.

Pressure29.94 inHg
Wind6.6 mph S
Humidity66%
Visibility—
Dew point69°
Thu, 2083° / 71°0.3Light rain
83 °Light rain

Dennison, Thursday, 20 August

Light rain. High 83°, low 71°.

Pressure29.88 inHg
Wind7.8 mph SW
Humidity68%
Visibility—
Dew point69°
Fri, 2180° / 65°0Overcast
80 °Overcast

Dennison, Friday, 21 August

Overcast. High 80°, low 65°.

Pressure29.91 inHg
Wind11.1 mph NE
Humidity65%
Visibility—
Dew point64°
Sat, 2284° / 64°0.01Light rain
84 °Light rain

Dennison, Saturday, 22 August

Light rain. High 84°, low 64°.

Pressure29.91 inHg
Wind16.2 mph NE
Humidity58%
Visibility—
Dew point64°
Sun, 2371° / 54°0Partly cloudy
71 °Partly cloudy

Dennison, Sunday, 23 August

Partly cloudy. High 71°, low 54°.

Pressure30.15 inHg
Wind13.6 mph E
Humidity52%
Visibility—
Dew point49°

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.