As of 07:01 CDT

Weather in Quincy, IL

60°

Quincy, Saturday, 10 October, 07:01

Clear. Feels like 59°. High 84°, low 60°.

Pressure30.00 inHg

Wind4.6 mph S

Humidity71%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Monthly outlook for Quincy, IL: average high 67.9°, average low 50°. That is 2° above the climate normal for October. Precipitation is expected on 5 days (about 1.8 inches), against a normal of 4 days and 1.6 inches. The warmest day looks like 12 October (90.2°), the coolest 18 October (30.1°).

67.9°/50°

Average high / low

+2°

Above normal

5 / 4

Wet days / normal

1.8 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
10 October – 19 October	69.9°	65°	+2.7°
20 October – 29 October	64.6°	61.4°	+1.7°
30 October – 8 November	at normal	56.7°	—

October records over 66 years

90.7°10 October 1963All-time high

26.2°29 October 1980All-time low

Climate normals and records are computed from the nearest reference point — La Grange (10 mi).

Sun, 1187° / 54°

87 °

Quincy, Sunday, 11 October

Clear. High 87°, low 54°.

Pressure29.94 inHg

Wind6.4 mph S

Humidity50%

Visibility6.2 mi

Dew point57°

Mon, 1290° / 68°

90 °

Quincy, Monday, 12 October

Clear. High 90°, low 68°.

Pressure29.83 inHg

Wind12.1 mph SW

Humidity46%

Visibility6.2 mi

Dew point62°

Tue, 1385° / 73°

85 °

Quincy, Tuesday, 13 October

Partly cloudy. High 85°, low 73°.

Pressure29.85 inHg

Wind7.3 mph W

Humidity59%

Visibility6.2 mi

Dew point67°

Wed, 1470° / 67°

0.31

70 °

Quincy, Wednesday, 14 October

Rain. High 70°, low 67°.

Pressure30.06 inHg

Wind10.5 mph NE

Humidity80%

Visibility—

Dew point63°

Thu, 1565° / 54°

1.2

65 °

Quincy, Thursday, 15 October

Rain. High 65°, low 54°.

Pressure30.24 inHg

Wind12.5 mph E

Humidity94%

Visibility—

Dew point55°

Fri, 1664° / 50°

64 °

Quincy, Friday, 16 October

Partly cloudy. High 64°, low 50°.

Pressure30.00 inHg

Wind19.4 mph NW

Humidity41%

Visibility—

Dew point38°

Sat, 1746° / 38°

0.03

46 °

Quincy, Saturday, 17 October

Light rain. High 46°, low 38°.

Pressure30.27 inHg

Wind21.2 mph NW

Humidity66%

Visibility—

Dew point31°

Sun, 1849° / 30°

49 °

Quincy, Sunday, 18 October

Clear. High 49°, low 30°.

Pressure30.50 inHg

Wind13.2 mph N

Humidity37%

Visibility—

Dew point19°

Mon, 1958° / 33°

58 °

Quincy, Monday, 19 October

Partly cloudy. High 58°, low 33°.

Pressure30.36 inHg

Wind11.5 mph S

Humidity37%

Visibility—

Dew point26°

Tue, 2063° / 41°

63 °

Quincy, Tuesday, 20 October

Overcast. High 63°, low 41°.

Pressure30.24 inHg

Wind11.7 mph S

Humidity37%

Visibility—

Dew point32°

Wed, 2168° / 43°

68 °

Quincy, Wednesday, 21 October

Mostly clear. High 68°, low 43°.

Pressure30.21 inHg

Wind11.4 mph S

Humidity32%

Visibility—

Dew point33°

Thu, 2274° / 47°

0.08

74 °

Quincy, Thursday, 22 October

Light rain. High 74°, low 47°.

Pressure30.06 inHg

Wind16.4 mph S

Humidity31%

Visibility—

Dew point36°

Fri, 2359° / 53°

0.17

59 °

Quincy, Friday, 23 October

Rain. High 59°, low 53°.

Pressure29.97 inHg

Wind13.8 mph SE

Humidity79%

Visibility—

Dew point51°

Sat, 2465° / 48°

0.04

65 °

Quincy, Saturday, 24 October

Light rain. High 65°, low 48°.

Pressure29.77 inHg

Wind11.6 mph S

Humidity53%

Visibility—

Dew point45°

Sun, 2559° / 42°

59 °

Quincy, Sunday, 25 October

Overcast. High 59°, low 42°.

Pressure29.91 inHg

Wind12.9 mph W

Humidity41%

Visibility—

Dew point31°

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

Mon, 2660° / 45°

0.1

60 °

Quincy, Monday, 26 October

Climate normal for this date — 60-year average.

Average high60°

Average low45°

Average precipitation0.1 in

Chance of precipitation37%

Record high82° (1963)

Record low27° (1962)

Tue, 2759° / 45°

0.07

59 °

Quincy, Tuesday, 27 October

Climate normal for this date — 60-year average.

Average high59°

Average low45°

Average precipitation0.07 in

Chance of precipitation23%

Record high76° (2014)

Record low29° (1997)

Wed, 2859° / 44°

0.05

59 °

Quincy, Wednesday, 28 October

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.05 in

Chance of precipitation22%

Record high77° (2016)

Record low28° (1969)

Thu, 2960° / 44°

0.07

60 °

Quincy, Thursday, 29 October

Climate normal for this date — 60-year average.

Average high60°

Average low44°

Average precipitation0.07 in

Chance of precipitation25%

Record high81° (2024)

Record low26° (1980)

Fri, 3060° / 45°

0.13

60 °

Quincy, Friday, 30 October

Climate normal for this date — 60-year average.

Average high60°

Average low45°

Average precipitation0.13 in

Chance of precipitation35%

Record high78° (1971)

Record low28° (1980)

Sat, 3159° / 45°

0.19

59 °

Quincy, Saturday, 31 October

Climate normal for this date — 60-year average.

Average high59°

Average low45°

Average precipitation0.19 in

Chance of precipitation42%

Record high77° (1968)

Record low27° (1993)

Sun, 0159° / 44°

0.2

59 °

Quincy, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high59°

Average low44°

Average precipitation0.2 in

Chance of precipitation30%

Record high78° (2000)

Record low25° (1993)

Mon, 0257° / 42°

0.1

57 °

Quincy, Monday, 2 November

Climate normal for this date — 60-year average.

Average high57°

Average low42°

Average precipitation0.1 in

Chance of precipitation32%

Record high76° (1964)

Record low24° (1991)

Tue, 0356° / 42°

0.14

56 °

Quincy, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°

Average low42°

Average precipitation0.14 in

Chance of precipitation30%

Record high75° (1987)

Record low17° (1991)

Wed, 0456° / 42°

0.1

56 °

Quincy, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high56°

Average low42°

Average precipitation0.1 in

Chance of precipitation28%

Record high75° (1978)

Record low15° (1991)

Thu, 0555° / 41°

0.1

55 °

Quincy, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high55°

Average low41°

Average precipitation0.1 in

Chance of precipitation28%

Record high73° (1978)

Record low23° (1991)

Fri, 0655° / 40°

0.09

55 °

Quincy, Friday, 6 November

Climate normal for this date — 60-year average.

Average high55°

Average low40°

Average precipitation0.09 in

Chance of precipitation23%

Record high73° (2020)

Record low24° (1991)

Sat, 0755° / 40°

0.02

55 °

Quincy, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high55°

Average low40°

Average precipitation0.02 in

Chance of precipitation13%

Record high73° (1966)

Record low10° (1991)

Sun, 0855° / 40°

0.06

55 °

Quincy, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high55°

Average low40°

Average precipitation0.06 in

Chance of precipitation20%

Record high77° (1999)

Record low-4° (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 Quincy, 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 Quincy, 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.