As of 05:33 CDT

Weather in Dennison, IL

48°

Dennison, Thursday, 8 October, 05:33

Clear. Feels like 47°. High 82°, low 48°.

Pressure30.03 inHg

Wind3.4 mph N

Humidity83%

Visibility6.2 mi

Dew point43°

See detailed hourly forecast

Fri, 0986° / 50°

86 °

Dennison, Friday, 9 October

Clear. High 86°, low 50°.

Pressure30.15 inHg

Wind8.6 mph S

Humidity28%

Visibility6.2 mi

Dew point44°

Sat, 1083° / 60°

83 °

Dennison, Saturday, 10 October

Overcast. High 83°, low 60°.

Pressure30.15 inHg

Wind5.7 mph SE

Humidity36%

Visibility6.2 mi

Dew point49°

Sun, 1174° / 60°

74 °

Dennison, Sunday, 11 October

Overcast. High 74°, low 60°.

Pressure29.94 inHg

Wind4.9 mph E

Humidity60%

Visibility6.2 mi

Dew point56°

Mon, 1287° / 57°

87 °

Dennison, Monday, 12 October

Clear. High 87°, low 57°.

Pressure29.91 inHg

Wind9.4 mph S

Humidity34%

Visibility—

Dew point49°

Tue, 1386° / 62°

86 °

Dennison, Tuesday, 13 October

Clear. High 86°, low 62°.

Pressure29.83 inHg

Wind11 mph NW

Humidity43%

Visibility—

Dew point59°

Wed, 1474° / 45°

74 °

Dennison, Wednesday, 14 October

Clear. High 74°, low 45°.

Pressure30.09 inHg

Wind8.9 mph SE

Humidity30%

Visibility—

Dew point34°

Thu, 1592° / 59°

92 °

Dennison, Thursday, 15 October

Clear. High 92°, low 59°.

Pressure29.94 inHg

Wind19.7 mph SW

Humidity37%

Visibility—

Dew point56°

Fri, 1682° / 65°

0.08

82 °

Dennison, Friday, 16 October

Light rain. High 82°, low 65°.

Pressure30.06 inHg

Wind18.2 mph S

Humidity51%

Visibility—

Dew point61°

Sat, 1765° / 54°

65 °

Dennison, Saturday, 17 October

Overcast. High 65°, low 54°.

Pressure30.33 inHg

Wind12.6 mph N

Humidity45%

Visibility—

Dew point42°

Sun, 1874° / 54°

74 °

Dennison, Sunday, 18 October

Overcast. High 74°, low 54°.

Pressure30.21 inHg

Wind6.1 mph NE

Humidity41%

Visibility—

Dew point46°

Mon, 1979° / 60°

0.07

79 °

Dennison, Monday, 19 October

Light rain. High 79°, low 60°.

Pressure30.12 inHg

Wind6.8 mph NE

Humidity50%

Visibility—

Dew point54°

Tue, 2076° / 59°

0.04

76 °

Dennison, Tuesday, 20 October

Light rain. High 76°, low 59°.

Pressure30.06 inHg

Wind8.5 mph N

Humidity54%

Visibility—

Dew point55°

Wed, 2172° / 55°

72 °

Dennison, Wednesday, 21 October

Mostly clear. High 72°, low 55°.

Pressure29.97 inHg

Wind7 mph E

Humidity44%

Visibility—

Dew point46°

Thu, 2280° / 52°

80 °

Dennison, Thursday, 22 October

Partly cloudy. High 80°, low 52°.

Pressure29.77 inHg

Wind12 mph S

Humidity36%

Visibility—

Dew point45°

Fri, 2385° / 63°

0.11

85 °

Dennison, Friday, 23 October

Light rain. High 85°, low 63°.

Pressure29.88 inHg

Wind15.4 mph SW

Humidity44%

Visibility—

Dew point57°

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.