As of 08:31 CDT

Weather in Chestnut, IL

60°

Chestnut, Wednesday, 7 October, 08:31

Clear. Feels like 59°. High 81°, low 56°.

Pressure29.88 inHg

Wind7.5 mph SW

Humidity68%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Monthly outlook for Chestnut, IL: average high 71.4°, average low 50°. That is 3.4° above the climate normal for October. Precipitation is expected on 1 day (about 0.5 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 15 October (83.5°), the coolest 19 October (39.4°).

71.4°/50°

Average high / low

+3.4°

Above normal

1 / 4

Wet days / normal

0.5 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
7 October – 16 October	77.4°	66.8°	+5.9°
17 October – 26 October	61.3°	62°	-0.4°
27 October – 5 November	at normal	58.2°	—

October records over 66 years

89.4°7 October 2007All-time high

21.9°22 October 1976All-time low

Climate normals and records are computed from the nearest reference point — Broadwell (14 mi).

Thu, 0878° / 52°

78 °

Chestnut, Thursday, 8 October

Clear. High 78°, low 52°.

Pressure30.12 inHg

Wind2.8 mph W

Humidity43%

Visibility6.2 mi

Dew point49°

Fri, 0981° / 53°

81 °

Chestnut, Friday, 9 October

Mostly clear. High 81°, low 53°.

Pressure30.15 inHg

Wind11.3 mph S

Humidity37%

Visibility6.2 mi

Dew point49°

Sat, 1083° / 59°

83 °

Chestnut, Saturday, 10 October

Overcast. High 83°, low 59°.

Pressure30.12 inHg

Wind9.6 mph S

Humidity44%

Visibility6.2 mi

Dew point57°

Sun, 1167° / 61°

0.52

67 °

Chestnut, Sunday, 11 October

Rain. High 67°, low 61°.

Pressure29.83 inHg

Wind12 mph NE

Humidity80%

Visibility—

Dew point59°

Mon, 1282° / 57°

82 °

Chestnut, Monday, 12 October

Clear. High 82°, low 57°.

Pressure29.83 inHg

Wind9.1 mph SW

Humidity53%

Visibility—

Dew point58°

Tue, 1370° / 50°

70 °

Chestnut, Tuesday, 13 October

Clear. High 70°, low 50°.

Pressure29.97 inHg

Wind17.6 mph NW

Humidity47%

Visibility—

Dew point48°

Wed, 1468° / 43°

68 °

Chestnut, Wednesday, 14 October

Mostly clear. High 68°, low 43°.

Pressure30.18 inHg

Wind10.8 mph E

Humidity35%

Visibility—

Dew point33°

Thu, 1584° / 53°

84 °

Chestnut, Thursday, 15 October

Clear. High 84°, low 53°.

Pressure29.91 inHg

Wind18.4 mph S

Humidity27%

Visibility—

Dew point39°

Fri, 1680° / 59°

0.03

80 °

Chestnut, Friday, 16 October

Light rain. High 80°, low 59°.

Pressure29.85 inHg

Wind20.4 mph W

Humidity61%

Visibility—

Dew point62°

Sat, 1761° / 46°

61 °

Chestnut, Saturday, 17 October

Clear. High 61°, low 46°.

Pressure30.03 inHg

Wind14 mph W

Humidity42%

Visibility—

Dew point36°

Sun, 1853° / 43°

53 °

Chestnut, Sunday, 18 October

Partly cloudy. High 53°, low 43°.

Pressure30.12 inHg

Wind15.6 mph W

Humidity55%

Visibility—

Dew point35°

Mon, 1962° / 39°

62 °

Chestnut, Monday, 19 October

Clear. High 62°, low 39°.

Pressure30.21 inHg

Wind8.7 mph NW

Humidity45%

Visibility—

Dew point35°

Tue, 2070° / 44°

70 °

Chestnut, Tuesday, 20 October

Clear. High 70°, low 44°.

Pressure30.18 inHg

Wind7.9 mph NW

Humidity34%

Visibility—

Dew point35°

Wed, 2162° / 45°

62 °

Chestnut, Wednesday, 21 October

Clear. High 62°, low 45°.

Pressure30.24 inHg

Wind10.5 mph E

Humidity40%

Visibility—

Dew point34°

Thu, 2261° / 40°

61 °

Chestnut, Thursday, 22 October

Overcast. High 61°, low 40°.

Pressure30.27 inHg

Wind7.4 mph E

Humidity30%

Visibility—

Dew point25°

From day 17 onward the outlook is built from 60-year climate statistics

Fri, 2363° / 47°

0.1

63 °

Chestnut, Friday, 23 October

Climate normal for this date — 60-year average.

Average high63°

Average low47°

Average precipitation0.1 in

Chance of precipitation33%

Record high82° (1963)

Record low30° (1982)

Sat, 2461° / 46°

0.14

61 °

Chestnut, Saturday, 24 October

Climate normal for this date — 60-year average.

Average high61°

Average low46°

Average precipitation0.14 in

Chance of precipitation33%

Record high81° (1963)

Record low24° (1981)

Sun, 2561° / 45°

0.15

61 °

Chestnut, Sunday, 25 October

Climate normal for this date — 60-year average.

Average high61°

Average low45°

Average precipitation0.15 in

Chance of precipitation30%

Record high78° (1963)

Record low28° (2013)

Mon, 2659° / 44°

0.14

59 °

Chestnut, Monday, 26 October

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.14 in

Chance of precipitation32%

Record high82° (1963)

Record low24° (1962)

Tue, 2760° / 44°

0.09

60 °

Chestnut, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.09 in

Chance of precipitation32%

Record high77° (1984)

Record low31° (2001)

Wed, 2859° / 43°

0.06

59 °

Chestnut, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.06 in

Chance of precipitation18%

Record high76° (1999)

Record low27° (1976)

Thu, 2959° / 43°

0.08

59 °

Chestnut, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.08 in

Chance of precipitation27%

Record high79° (1971)

Record low25° (1980)

Fri, 3061° / 45°

0.12

61 °

Chestnut, Friday, 30 October

Climate normal for this date — 60-year average.

Average high61°

Average low45°

Average precipitation0.12 in

Chance of precipitation30%

Record high80° (1971)

Record low25° (1980)

Sat, 3160° / 45°

0.19

60 °

Chestnut, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high60°

Average low45°

Average precipitation0.19 in

Chance of precipitation42%

Record high77° (1968)

Record low28° (2019)

Sun, 0159° / 43°

0.2

59 °

Chestnut, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high59°

Average low43°

Average precipitation0.2 in

Chance of precipitation35%

Record high79° (2016)

Record low25° (1993)

Mon, 0257° / 42°

0.08

57 °

Chestnut, Monday, 2 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.08 in

Chance of precipitation28%

Record high77° (1961)

Record low25° (1996)

Tue, 0356° / 41°

0.11

56 °

Chestnut, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°

Average low41°

Average precipitation0.11 in

Chance of precipitation30%

Record high77° (1987)

Record low18° (1991)

Wed, 0456° / 42°

0.1

56 °

Chestnut, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high56°

Average low42°

Average precipitation0.1 in

Chance of precipitation25%

Record high76° (1978)

Record low16° (1991)

Thu, 0556° / 41°

0.15

56 °

Chestnut, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high56°

Average low41°

Average precipitation0.15 in

Chance of precipitation30%

Record high77° (1978)

Record low19° (1991)

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 Chestnut, 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 Chestnut, 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.