As of 07:01 CDT

Weather in Lemont, IL

50°

Lemont, Saturday, 24 October, 07:01

Overcast. Feels like 49°. High 70°, low 49°.

Pressure30.36 inHg

Wind8 mph E

Humidity76%

Visibility6.2 mi

Dew point44°

See detailed hourly forecast

Monthly outlook for Lemont, IL: average high 60.1°, average low 48.9°. That is 2.9° above the climate normal for October. Precipitation is expected on 3 days (about 0.9 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 25 October (72.3°), the coolest 6 November (30.1°).

60.1°/48.9°

Average high / low

+2.9°

Above normal

3 / 5

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
24 October – 2 November	66.8°	56.3°	+5.8°
3 November – 12 November	49°	51.3°	-1.2°
13 November – 22 November	at normal	46.9°	—

October records over 66 years

86.7°7 October 2007All-time high

23.9°26 October 1962All-time low

Climate normals and records are computed from the nearest reference point — Orland Hills (9 mi).

Sun, 2572° / 48°

72 °

Lemont, Sunday, 25 October

Overcast. High 72°, low 48°.

Pressure30.42 inHg

Wind4.5 mph S

Humidity65%

Visibility6.2 mi

Dew point53°

Mon, 2666° / 50°

66 °

Lemont, Monday, 26 October

Overcast. High 66°, low 50°.

Pressure30.33 inHg

Wind4.6 mph NE

Humidity81%

Visibility6.2 mi

Dew point56°

Tue, 2767° / 51°

67 °

Lemont, Tuesday, 27 October

Overcast. High 67°, low 51°.

Pressure30.27 inHg

Wind4.9 mph SE

Humidity75%

Visibility6.2 mi

Dew point55°

Wed, 2870° / 54°

70 °

Lemont, Wednesday, 28 October

Clear. High 70°, low 54°.

Pressure30.18 inHg

Wind8.5 mph S

Humidity60%

Visibility—

Dew point52°

Thu, 2971° / 56°

0.01

71 °

Lemont, Thursday, 29 October

Light rain. High 71°, low 56°.

Pressure30.15 inHg

Wind9.2 mph S

Humidity62%

Visibility—

Dew point54°

Fri, 3063° / 61°

0.02

63 °

Lemont, Friday, 30 October

Light rain. High 63°, low 61°.

Pressure30.21 inHg

Wind8 mph NE

Humidity81%

Visibility—

Dew point57°

Sat, 3167° / 58°

0.27

67 °

Lemont, Saturday, 31 October

Light rain. High 67°, low 58°.

Pressure30.09 inHg

Wind10.4 mph SW

Humidity67%

Visibility—

Dew point52°

Sun, 0162° / 57°

0.27

62 °

Lemont, Sunday, 1 November

Rain. High 62°, low 57°.

Pressure30.03 inHg

Wind8.1 mph S

Humidity85%

Visibility—

Dew point56°

Mon, 0261° / 56°

61 °

Lemont, Monday, 2 November

Overcast. High 61°, low 56°.

Pressure30.12 inHg

Wind10.1 mph NE

Humidity63%

Visibility—

Dew point48°

Tue, 0357° / 54°

0.31

57 °

Lemont, Tuesday, 3 November

Rain. High 57°, low 54°.

Pressure29.85 inHg

Wind13.8 mph NE

Humidity92%

Visibility—

Dew point52°

Wed, 0457° / 50°

57 °

Lemont, Wednesday, 4 November

Overcast. High 57°, low 50°.

Pressure29.94 inHg

Wind12.8 mph NE

Humidity44%

Visibility—

Dew point35°

Thu, 0549° / 37°

49 °

Lemont, Thursday, 5 November

Clear. High 49°, low 37°.

Pressure29.97 inHg

Wind14 mph N

Humidity38%

Visibility—

Dew point22°

Fri, 0640° / 30°

40 °

Lemont, Friday, 6 November

Clear. High 40°, low 30°.

Pressure30.33 inHg

Wind11.4 mph NW

Humidity35%

Visibility—

Dew point12°

Sat, 0742° / 31°

42 °

Lemont, Saturday, 7 November

Mostly clear. High 42°, low 31°.

Pressure30.45 inHg

Wind13.8 mph S

Humidity33%

Visibility—

Dew point13°

Sun, 0849° / 40°

0.01

49 °

Lemont, Sunday, 8 November

Light rain. High 49°, low 40°.

Pressure30.03 inHg

Wind16.2 mph SW

Humidity56%

Visibility—

Dew point32°

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

Mon, 0952° / 39°

0.13

52 °

Lemont, Monday, 9 November

Climate normal for this date — 60-year average.

Average high52°

Average low39°

Average precipitation0.13 in

Chance of precipitation35%

Record high71° (1999)

Record low18° (1991)

Tue, 1051° / 38°

0.14

51 °

Lemont, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high51°

Average low38°

Average precipitation0.14 in

Chance of precipitation33%

Record high72° (2020)

Record low17° (2018)

Wed, 1148° / 35°

0.07

48 °

Lemont, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high48°

Average low35°

Average precipitation0.07 in

Chance of precipitation30%

Record high71° (1964)

Record low18° (2019)

Thu, 1247° / 34°

0.06

47 °

Lemont, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.06 in

Chance of precipitation23%

Record high68° (1964)

Record low5° (2019)

Fri, 1347° / 34°

0.06

47 °

Lemont, Friday, 13 November

Climate normal for this date — 60-year average.

Average high47°

Average low34°

Average precipitation0.06 in

Chance of precipitation20%

Record high69° (1999)

Record low3° (2019)

Sat, 1448° / 34°

0.08

48 °

Lemont, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high48°

Average low34°

Average precipitation0.08 in

Chance of precipitation37%

Record high70° (1971)

Record low13° (1986)

Sun, 1548° / 35°

0.09

48 °

Lemont, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high48°

Average low35°

Average precipitation0.09 in

Chance of precipitation33%

Record high67° (2025)

Record low20° (1982)

Mon, 1647° / 35°

0.05

47 °

Lemont, Monday, 16 November

Climate normal for this date — 60-year average.

Average high47°

Average low35°

Average precipitation0.05 in

Chance of precipitation22%

Record high64° (1988)

Record low21° (1997)

Tue, 1748° / 35°

0.09

48 °

Lemont, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high48°

Average low35°

Average precipitation0.09 in

Chance of precipitation27%

Record high69° (2016)

Record low16° (2014)

Wed, 1848° / 36°

0.14

48 °

Lemont, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high48°

Average low36°

Average precipitation0.14 in

Chance of precipitation28%

Record high67° (2016)

Record low11° (2014)

Thu, 1947° / 35°

0.08

47 °

Lemont, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high47°

Average low35°

Average precipitation0.08 in

Chance of precipitation32%

Record high65° (1985)

Record low18° (2014)

Fri, 2046° / 34°

0.1

46 °

Lemont, Friday, 20 November

Climate normal for this date — 60-year average.

Average high46°

Average low34°

Average precipitation0.1 in

Chance of precipitation27%

Record high63° (2003)

Record low14° (2022)

Sat, 2145° / 33°

0.11

45 °

Lemont, Saturday, 21 November

Climate normal for this date — 60-year average.

Average high45°

Average low33°

Average precipitation0.11 in

Chance of precipitation30%

Record high67° (1990)

Record low10° (1964)

Sun, 2245° / 31°

0.05

45 °

Lemont, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high45°

Average low31°

Average precipitation0.05 in

Chance of precipitation22%

Record high68° (2010)

Record low8° (2015)

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 Lemont, 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 Lemont, 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.