As of 14:45 CDT

Weather in Dewey, IL

78°

Dewey, Saturday, 10 October, 14:45

Overcast. Feels like 78°. High 78°, low 56°.

Pressure30.06 inHg

Wind10.4 mph SE

Humidity36%

Visibility6.2 mi

Dew point48°

See detailed hourly forecast

Monthly outlook for Dewey, IL: average high 65.3°, average low 47.1°. That is 1.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.8 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (85.9°), the coolest 18 October (29.6°).

65.3°/47.1°

Average high / low

+1.2°

Above normal

4 / 5

Wet days / normal

0.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	67.5°	64.1°	+1.9°
20 October – 29 October	61.6°	60.2°	+0.8°
30 October – 8 November	at normal	56.3°	—

October records over 66 years

88.2°7 October 2007All-time high

21.7°24 October 1981All-time low

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

Sun, 1179° / 52°

79 °

Dewey, Sunday, 11 October

Clear. High 79°, low 52°.

Pressure30.00 inHg

Wind2.4 mph N

Humidity54%

Visibility6.2 mi

Dew point54°

Mon, 1286° / 53°

86 °

Dewey, Monday, 12 October

Clear. High 86°, low 53°.

Pressure29.91 inHg

Wind11.4 mph SW

Humidity48%

Visibility6.2 mi

Dew point60°

Tue, 1386° / 70°

86 °

Dewey, Tuesday, 13 October

Clear. High 86°, low 70°.

Pressure29.85 inHg

Wind11.8 mph W

Humidity52%

Visibility6.2 mi

Dew point64°

Wed, 1475° / 58°

75 °

Dewey, Wednesday, 14 October

Overcast. High 75°, low 58°.

Pressure30.06 inHg

Wind8.6 mph NE

Humidity59%

Visibility6.2 mi

Dew point58°

Thu, 1563° / 55°

0.18

63 °

Dewey, Thursday, 15 October

Light rain. High 63°, low 55°.

Pressure30.24 inHg

Wind11.7 mph E

Humidity60%

Visibility—

Dew point48°

Fri, 1661° / 42°

0.1

61 °

Dewey, Friday, 16 October

Light rain. High 61°, low 42°.

Pressure29.91 inHg

Wind25.4 mph W

Humidity42%

Visibility—

Dew point33°

Sat, 1741° / 33°

41 °

Dewey, Saturday, 17 October

Overcast. High 41°, low 33°.

Pressure30.30 inHg

Wind20.2 mph NW

Humidity53%

Visibility—

Dew point23°

Sun, 1848° / 30°

48 °

Dewey, Sunday, 18 October

Clear. High 48°, low 30°.

Pressure30.50 inHg

Wind10.1 mph NW

Humidity37%

Visibility—

Dew point20°

Mon, 1958° / 36°

58 °

Dewey, Monday, 19 October

Overcast. High 58°, low 36°.

Pressure30.42 inHg

Wind13 mph S

Humidity34%

Visibility—

Dew point24°

Tue, 2064° / 40°

64 °

Dewey, Tuesday, 20 October

Overcast. High 64°, low 40°.

Pressure30.30 inHg

Wind13.7 mph S

Humidity30%

Visibility—

Dew point28°

Wed, 2159° / 49°

0.12

59 °

Dewey, Wednesday, 21 October

Light rain. High 59°, low 49°.

Pressure30.03 inHg

Wind17.2 mph SW

Humidity54%

Visibility—

Dew point41°

Thu, 2266° / 43°

66 °

Dewey, Thursday, 22 October

Clear. High 66°, low 43°.

Pressure30.15 inHg

Wind12.6 mph SW

Humidity40%

Visibility—

Dew point36°

Fri, 2361° / 46°

61 °

Dewey, Friday, 23 October

Clear. High 61°, low 46°.

Pressure30.18 inHg

Wind11.2 mph NW

Humidity36%

Visibility—

Dew point31°

Sat, 2460° / 45°

60 °

Dewey, Saturday, 24 October

Overcast. High 60°, low 45°.

Pressure30.18 inHg

Wind6.5 mph SE

Humidity34%

Visibility—

Dew point29°

Sun, 2559° / 46°

0.41

59 °

Dewey, Sunday, 25 October

Rain. High 59°, low 46°.

Pressure29.74 inHg

Wind17.4 mph S

Humidity87%

Visibility—

Dew point55°

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

Mon, 2659° / 44°

0.12

59 °

Dewey, Monday, 26 October

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.12 in

Chance of precipitation30%

Record high81° (1963)

Record low23° (1962)

Tue, 2759° / 44°

0.08

59 °

Dewey, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.08 in

Chance of precipitation33%

Record high75° (1984)

Record low31° (2001)

Wed, 2858° / 42°

0.07

58 °

Dewey, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high58°

Average low42°

Average precipitation0.07 in

Chance of precipitation18%

Record high76° (1999)

Record low26° (1976)

Thu, 2958° / 42°

0.06

58 °

Dewey, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high58°

Average low42°

Average precipitation0.06 in

Chance of precipitation22%

Record high78° (2024)

Record low25° (1980)

Fri, 3060° / 44°

0.09

60 °

Dewey, Friday, 30 October

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.09 in

Chance of precipitation30%

Record high79° (1971)

Record low24° (1980)

Sat, 3159° / 45°

0.17

59 °

Dewey, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high59°

Average low45°

Average precipitation0.17 in

Chance of precipitation37%

Record high75° (1974)

Record low26° (1988)

Sun, 0158° / 43°

0.18

58 °

Dewey, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high58°

Average low43°

Average precipitation0.18 in

Chance of precipitation30%

Record high76° (2016)

Record low26° (1993)

Mon, 0257° / 42°

0.1

57 °

Dewey, Monday, 2 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.1 in

Chance of precipitation28%

Record high76° (2016)

Record low25° (1996)

Tue, 0356° / 40°

0.08

56 °

Dewey, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°

Average low40°

Average precipitation0.08 in

Chance of precipitation25%

Record high76° (1987)

Record low19° (1991)

Wed, 0455° / 42°

0.09

55 °

Dewey, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high55°

Average low42°

Average precipitation0.09 in

Chance of precipitation28%

Record high74° (1978)

Record low17° (1991)

Thu, 0555° / 40°

0.11

55 °

Dewey, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high55°

Average low40°

Average precipitation0.11 in

Chance of precipitation28%

Record high76° (1978)

Record low19° (1991)

Fri, 0655° / 39°

0.07

55 °

Dewey, Friday, 6 November

Climate normal for this date — 60-year average.

Average high55°

Average low39°

Average precipitation0.07 in

Chance of precipitation25%

Record high70° (2020)

Record low25° (2010)

Sat, 0754° / 39°

0.09

54 °

Dewey, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.09 in

Chance of precipitation22%

Record high69° (1966)

Record low19° (1991)

Sun, 0854° / 39°

0.04

54 °

Dewey, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high54°

Average low39°

Average precipitation0.04 in

Chance of precipitation17%

Record high76° (2023)

Record low10° (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 Dewey, 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 Dewey, 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.