As of 21:14 CDT

Weather in Quincy, IL

55°

Quincy, Monday, 19 October, 21:14

Overcast. Feels like 53°. High 70°, low 40°.

Pressure30.30 inHg

Wind5.7 mph SE

Humidity69%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Monthly outlook for Quincy, IL: average high 62.9°, average low 45°. That is 1.4° above the climate normal for October. Precipitation is expected on 4 days (about 2.2 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 22 October (72.4°), the coolest 28 October (27.9°).

62.9°/45°

Average high / low

+1.4°

Above normal

4 / 5

Wet days / normal

2.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
19 October – 28 October	65.4°	61.6°	+2.1°
29 October – 7 November	58.6°	57.1°	+0.8°
8 November – 17 November	at normal	52.3°	—

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).

Tue, 2072° / 45°

72 °

Quincy, Tuesday, 20 October

Clear. High 72°, low 45°.

Pressure30.36 inHg

Wind4.5 mph S

Humidity53%

Visibility6.2 mi

Dew point49°

Wed, 2172° / 48°

72 °

Quincy, Wednesday, 21 October

Partly cloudy. High 72°, low 48°.

Pressure30.27 inHg

Wind3.1 mph S

Humidity56%

Visibility6.2 mi

Dew point51°

Thu, 2272° / 51°

72 °

Quincy, Thursday, 22 October

Clear. High 72°, low 51°.

Pressure30.30 inHg

Wind2.3 mph E

Humidity51%

Visibility6.2 mi

Dew point51°

Fri, 2371° / 53°

71 °

Quincy, Friday, 23 October

Clear. High 71°, low 53°.

Pressure30.30 inHg

Wind7.3 mph SE

Humidity59%

Visibility6.2 mi

Dew point52°

Sat, 2471° / 53°

71 °

Quincy, Saturday, 24 October

Partly cloudy. High 71°, low 53°.

Pressure30.33 inHg

Wind9.1 mph S

Humidity49%

Visibility—

Dew point47°

Sun, 2572° / 56°

0.01

72 °

Quincy, Sunday, 25 October

Light rain. High 72°, low 56°.

Pressure30.36 inHg

Wind9 mph SE

Humidity53%

Visibility—

Dew point51°

Mon, 2660° / 52°

0.67

60 °

Quincy, Monday, 26 October

Rain. High 60°, low 52°.

Pressure30.27 inHg

Wind9 mph NE

Humidity93%

Visibility—

Dew point55°

Tue, 2751° / 36°

0.63

51 °

Quincy, Tuesday, 27 October

Rain. High 51°, low 36°.

Pressure30.39 inHg

Wind17.3 mph N

Humidity62%

Visibility—

Dew point36°

Wed, 2843° / 28°

43 °

Quincy, Wednesday, 28 October

Clear. High 43°, low 28°.

Pressure30.56 inHg

Wind10.5 mph N

Humidity35%

Visibility—

Dew point14°

Thu, 2952° / 29°

52 °

Quincy, Thursday, 29 October

Clear. High 52°, low 29°.

Pressure30.30 inHg

Wind7 mph SW

Humidity34%

Visibility—

Dew point19°

Fri, 3058° / 37°

58 °

Quincy, Friday, 30 October

Overcast. High 58°, low 37°.

Pressure30.12 inHg

Wind10.8 mph SW

Humidity36%

Visibility—

Dew point25°

Sat, 3166° / 43°

66 °

Quincy, Saturday, 31 October

Overcast. High 66°, low 43°.

Pressure30.12 inHg

Wind11 mph SW

Humidity34%

Visibility—

Dew point32°

Sun, 0156° / 50°

0.49

56 °

Quincy, Sunday, 1 November

Rain. High 56°, low 50°.

Pressure30.12 inHg

Wind15 mph S

Humidity92%

Visibility—

Dew point50°

Mon, 0257° / 51°

0.41

57 °

Quincy, Monday, 2 November

Rain. High 57°, low 51°.

Pressure29.97 inHg

Wind11.9 mph NW

Humidity91%

Visibility—

Dew point51°

Tue, 0363° / 48°

63 °

Quincy, Tuesday, 3 November

Clear. High 63°, low 48°.

Pressure30.00 inHg

Wind9.8 mph NW

Humidity55%

Visibility—

Dew point44°

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

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)

Mon, 0956° / 41°

0.12

56 °

Quincy, Monday, 9 November

Climate normal for this date — 60-year average.

Average high56°

Average low41°

Average precipitation0.12 in

Chance of precipitation30%

Record high76° (2022)

Record low5° (1991)

Tue, 1053° / 38°

0.13

53 °

Quincy, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high53°

Average low38°

Average precipitation0.13 in

Chance of precipitation32%

Record high75° (2022)

Record low17° (1991)

Wed, 1151° / 36°

0.07

51 °

Quincy, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.07 in

Chance of precipitation27%

Record high75° (1964)

Record low18° (2019)

Thu, 1250° / 35°

0.06

50 °

Quincy, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high50°

Average low35°

Average precipitation0.06 in

Chance of precipitation25%

Record high70° (1999)

Record low9° (2019)

Fri, 1351° / 35°

0.05

51 °

Quincy, Friday, 13 November

Climate normal for this date — 60-year average.

Average high51°

Average low35°

Average precipitation0.05 in

Chance of precipitation13%

Record high75° (1999)

Record low10° (1986)

Sat, 1452° / 37°

0.06

52 °

Quincy, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.06 in

Chance of precipitation22%

Record high76° (2025)

Record low15° (1986)

Sun, 1552° / 37°

0.07

52 °

Quincy, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high52°

Average low37°

Average precipitation0.07 in

Chance of precipitation28%

Record high73° (2025)

Record low21° (2014)

Mon, 1651° / 36°

0.07

51 °

Quincy, Monday, 16 November

Climate normal for this date — 60-year average.

Average high51°

Average low36°

Average precipitation0.07 in

Chance of precipitation20%

Record high71° (2001)

Record low21° (1997)

Tue, 1753° / 37°

0.16

53 °

Quincy, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high53°

Average low37°

Average precipitation0.16 in

Chance of precipitation30%

Record high74° (2016)

Record low19° (2014)

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.