As of 09:26 CDT

Weather in Richardson, IL

57°

Richardson, Friday, 23 October, 09:26

Clear. Feels like 56°. High 70°, low 47°.

Pressure30.33 inHg

Wind6.9 mph S

Humidity81%

Visibility6.2 mi

Dew point50°

See detailed hourly forecast

Monthly outlook for Richardson, IL: average high 63.2°, average low 50°. That is 4.8° above the climate normal for October. Precipitation is expected on 6 days (about 1.1 inches), against a normal of 4 days and 1.5 inches. The warmest day looks like 25 October (70.4°), the coolest 30 October (40.4°).

63.2°/50°

Average high / low

+4.8°

Above normal

6 / 4

Wet days / normal

1.1 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
23 October – 1 November	63°	56.1°	+3.8°
2 November – 11 November	63.5°	50.9°	+7°
12 November – 21 November	at normal	46.1°	—

October records over 66 years

87.1°3 October 2025All-time high

22.1°24 October 1981All-time low

Climate normals and records are computed from the nearest reference point — Sycamore (5 mi).

Sat, 2468° / 46°

68 °

Richardson, Saturday, 24 October

Overcast. High 68°, low 46°.

Pressure30.36 inHg

Wind8.1 mph S

Humidity61%

Visibility6.2 mi

Dew point49°

Sun, 2570° / 48°

70 °

Richardson, Sunday, 25 October

Partly cloudy. High 70°, low 48°.

Pressure30.39 inHg

Wind6 mph S

Humidity55%

Visibility6.2 mi

Dew point50°

Mon, 2663° / 49°

63 °

Richardson, Monday, 26 October

Overcast. High 63°, low 49°.

Pressure30.36 inHg

Wind6.8 mph NE

Humidity73%

Visibility6.2 mi

Dew point53°

Tue, 2762° / 49°

62 °

Richardson, Tuesday, 27 October

Overcast. High 62°, low 49°.

Pressure30.27 inHg

Wind8.7 mph SE

Humidity72%

Visibility—

Dew point50°

Wed, 2869° / 52°

69 °

Richardson, Wednesday, 28 October

Partly cloudy. High 69°, low 52°.

Pressure30.06 inHg

Wind15.5 mph S

Humidity57%

Visibility—

Dew point49°

Thu, 2961° / 47°

0.2

61 °

Richardson, Thursday, 29 October

Light rain. High 61°, low 47°.

Pressure30.06 inHg

Wind15.1 mph SW

Humidity91%

Visibility—

Dew point56°

Fri, 3049° / 40°

0.04

49 °

Richardson, Friday, 30 October

Light rain. High 49°, low 40°.

Pressure30.27 inHg

Wind10.3 mph NE

Humidity68%

Visibility—

Dew point37°

Sat, 3157° / 45°

0.17

57 °

Richardson, Saturday, 31 October

Light rain. High 57°, low 45°.

Pressure30.15 inHg

Wind10.6 mph E

Humidity93%

Visibility—

Dew point49°

Sun, 0161° / 52°

61 °

Richardson, Sunday, 1 November

Overcast. High 61°, low 52°.

Pressure30.12 inHg

Wind3.2 mph SE

Humidity71%

Visibility—

Dew point49°

Mon, 0261° / 50°

0.07

61 °

Richardson, Monday, 2 November

Light rain. High 61°, low 50°.

Pressure30.03 inHg

Wind10.4 mph SE

Humidity67%

Visibility—

Dew point49°

Tue, 0358° / 55°

0.46

58 °

Richardson, Tuesday, 3 November

Rain. High 58°, low 55°.

Pressure29.71 inHg

Wind12.4 mph SE

Humidity98%

Visibility—

Dew point57°

Wed, 0465° / 58°

0.03

65 °

Richardson, Wednesday, 4 November

Light rain. High 65°, low 58°.

Pressure29.68 inHg

Wind9 mph NW

Humidity83%

Visibility—

Dew point58°

Thu, 0565° / 55°

0.09

65 °

Richardson, Thursday, 5 November

Light rain. High 65°, low 55°.

Pressure29.83 inHg

Wind8.1 mph SE

Humidity68%

Visibility—

Dew point53°

Fri, 0664° / 54°

0.01

64 °

Richardson, Friday, 6 November

Light rain. High 64°, low 54°.

Pressure29.85 inHg

Wind13 mph SW

Humidity62%

Visibility—

Dew point49°

Sat, 0767° / 52°

67 °

Richardson, Saturday, 7 November

Clear. High 67°, low 52°.

Pressure29.74 inHg

Wind16.6 mph W

Humidity46%

Visibility—

Dew point44°

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

Sun, 0851° / 37°

0.05

51 °

Richardson, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.05 in

Chance of precipitation13%

Record high72° (2020)

Record low12° (1991)

Mon, 0951° / 37°

0.12

51 °

Richardson, Monday, 9 November

Climate normal for this date — 60-year average.

Average high51°

Average low37°

Average precipitation0.12 in

Chance of precipitation33%

Record high73° (1999)

Record low17° (1991)

Tue, 1049° / 35°

0.1

49 °

Richardson, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high49°

Average low35°

Average precipitation0.1 in

Chance of precipitation33%

Record high72° (2022)

Record low15° (2017)

Wed, 1147° / 33°

0.07

47 °

Richardson, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.07 in

Chance of precipitation25%

Record high70° (1964)

Record low13° (2019)

Thu, 1246° / 32°

0.06

46 °

Richardson, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.06 in

Chance of precipitation23%

Record high65° (1964)

Record low1° (2019)

Fri, 1346° / 32°

0.04

46 °

Richardson, Friday, 13 November

Climate normal for this date — 60-year average.

Average high46°

Average low32°

Average precipitation0.04 in

Chance of precipitation20%

Record high70° (1999)

Record low1° (2019)

Sat, 1447° / 32°

0.07

47 °

Richardson, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high47°

Average low32°

Average precipitation0.07 in

Chance of precipitation30%

Record high69° (1971)

Record low13° (1986)

Sun, 1546° / 33°

0.08

46 °

Richardson, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.08 in

Chance of precipitation23%

Record high69° (2025)

Record low14° (2019)

Mon, 1647° / 33°

0.05

47 °

Richardson, Monday, 16 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.05 in

Chance of precipitation15%

Record high63° (1988)

Record low18° (1997)

Tue, 1747° / 33°

0.1

47 °

Richardson, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high47°

Average low33°

Average precipitation0.1 in

Chance of precipitation28%

Record high71° (2016)

Record low14° (2014)

Wed, 1847° / 34°

0.1

47 °

Richardson, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.1 in

Chance of precipitation25%

Record high68° (1999)

Record low11° (2014)

Thu, 1946° / 33°

0.07

46 °

Richardson, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high46°

Average low33°

Average precipitation0.07 in

Chance of precipitation28%

Record high64° (1983)

Record low11° (2018)

Fri, 2045° / 32°

0.08

45 °

Richardson, Friday, 20 November

Climate normal for this date — 60-year average.

Average high45°

Average low32°

Average precipitation0.08 in

Chance of precipitation35%

Record high63° (2003)

Record low13° (2022)

Sat, 2144° / 30°

0.1

44 °

Richardson, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high44°

Average low30°

Average precipitation0.1 in

Chance of precipitation23%

Record high66° (1990)

Record low8° (1964)

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 Richardson, 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 Richardson, 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.