As of 00:17 CDT

Weather in Dennison, IL

62°

Dennison, Thursday, 8 October, 00:17

Clear. Feels like 61°. High 80°, low 52°.

Pressure29.94 inHg

Wind9 mph N

Humidity63%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Fri, 0983° / 49°

83 °

Dennison, Friday, 9 October

Clear. High 83°, low 49°.

Pressure30.15 inHg

Wind9.5 mph S

Humidity34%

Visibility6.2 mi

Dew point48°

Sat, 1082° / 59°

82 °

Dennison, Saturday, 10 October

Overcast. High 82°, low 59°.

Pressure30.18 inHg

Wind5.9 mph SE

Humidity41%

Visibility6.2 mi

Dew point54°

Sun, 1171° / 60°

0.13

71 °

Dennison, Sunday, 11 October

Light rain. High 71°, low 60°.

Pressure29.91 inHg

Wind6.5 mph E

Humidity76%

Visibility6.2 mi

Dew point58°

Mon, 1285° / 58°

85 °

Dennison, Monday, 12 October

Clear. High 85°, low 58°.

Pressure29.91 inHg

Wind12.1 mph SW

Humidity39%

Visibility—

Dew point52°

Tue, 1373° / 51°

73 °

Dennison, Tuesday, 13 October

Overcast. High 73°, low 51°.

Pressure29.97 inHg

Wind14.7 mph N

Humidity48%

Visibility—

Dew point49°

Wed, 1468° / 42°

68 °

Dennison, Wednesday, 14 October

Mostly clear. High 68°, low 42°.

Pressure30.09 inHg

Wind9.2 mph NE

Humidity29%

Visibility—

Dew point31°

Thu, 1593° / 59°

93 °

Dennison, Thursday, 15 October

Clear. High 93°, low 59°.

Pressure29.91 inHg

Wind18.4 mph SW

Humidity41%

Visibility—

Dew point60°

Fri, 1688° / 71°

0.03

88 °

Dennison, Friday, 16 October

Light rain. High 88°, low 71°.

Pressure29.97 inHg

Wind21.4 mph SW

Humidity47%

Visibility—

Dew point63°

Sat, 1763° / 52°

0.02

63 °

Dennison, Saturday, 17 October

Light rain. High 63°, low 52°.

Pressure30.18 inHg

Wind14.6 mph NW

Humidity47%

Visibility—

Dew point36°

Sun, 1861° / 42°

61 °

Dennison, Sunday, 18 October

Clear. High 61°, low 42°.

Pressure30.27 inHg

Wind9.2 mph NW

Humidity40%

Visibility—

Dew point32°

Mon, 1964° / 40°

64 °

Dennison, Monday, 19 October

Mostly clear. High 64°, low 40°.

Pressure30.27 inHg

Wind6.7 mph NE

Humidity34%

Visibility—

Dew point30°

Tue, 2071° / 44°

71 °

Dennison, Tuesday, 20 October

Overcast. High 71°, low 44°.

Pressure30.12 inHg

Wind12.3 mph N

Humidity28%

Visibility—

Dew point31°

Wed, 2162° / 41°

62 °

Dennison, Wednesday, 21 October

Overcast. High 62°, low 41°.

Pressure30.21 inHg

Wind10.9 mph NE

Humidity29%

Visibility—

Dew point25°

Thu, 2262° / 46°

0.2

62 °

Dennison, Thursday, 22 October

Light rain. High 62°, low 46°.

Pressure29.83 inHg

Wind15.2 mph S

Humidity50%

Visibility—

Dew point42°

Fri, 2358° / 53°

0.02

58 °

Dennison, Friday, 23 October

Light rain. High 58°, low 53°.

Pressure29.77 inHg

Wind12.7 mph S

Humidity91%

Visibility—

Dew point51°

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.