As of 02:55 CST

Weather in Lemont, IL

44°

Lemont, Thursday, 12 November, 02:55

Overcast. Feels like 39°. High 45°, low 36°.

Pressure29.83 inHg

Wind9.2 mph NW

Humidity87%

Visibility6.2 mi

Dew point41°

See detailed hourly forecast

Monthly outlook for Lemont, IL: average high 47.9°, average low 36.6°. That is 1.1° above the climate normal for November. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 20 November (62.9°), the coolest 26 November (23.3°).

47.9°/36.6°

Average high / low

+1.1°

Above normal

2 / 5

Wet days / normal

0.2 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
12 November – 21 November	51.7°	47.1°	+2.5°
22 November – 1 December	41.6°	42.7°	-0.6°
2 December – 11 December	at normal	37.6°	—

November records over 66 years

75.2°5 November 1978All-time high

2.7°13 November 2019All-time low

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

Fri, 1342° / 34°

0.01

42 °

Lemont, Friday, 13 November

Light rain. High 42°, low 34°.

Pressure30.06 inHg

Wind10.1 mph N

Humidity70%

Visibility6.2 mi

Dew point30°

Sat, 1444° / 30°

44 °

Lemont, Saturday, 14 November

Clear. High 44°, low 30°.

Pressure30.27 inHg

Wind6.2 mph NW

Humidity63%

Visibility6.2 mi

Dew point30°

Sun, 1545° / 30°

45 °

Lemont, Sunday, 15 November

Clear. High 45°, low 30°.

Pressure30.45 inHg

Wind3.9 mph NW

Humidity62%

Visibility6.2 mi

Dew point31°

Mon, 1648° / 30°

48 °

Lemont, Monday, 16 November

Clear. High 48°, low 30°.

Pressure30.50 inHg

Wind5.1 mph SW

Humidity59%

Visibility—

Dew point31°

Tue, 1751° / 31°

51 °

Lemont, Tuesday, 17 November

Clear. High 51°, low 31°.

Pressure30.47 inHg

Wind5.7 mph S

Humidity61%

Visibility—

Dew point34°

Wed, 1857° / 41°

57 °

Lemont, Wednesday, 18 November

Mostly clear. High 57°, low 41°.

Pressure30.30 inHg

Wind10.5 mph S

Humidity41%

Visibility—

Dew point30°

Thu, 1960° / 46°

60 °

Lemont, Thursday, 19 November

Overcast. High 60°, low 46°.

Pressure30.15 inHg

Wind13.1 mph S

Humidity41%

Visibility—

Dew point33°

Fri, 2063° / 50°

63 °

Lemont, Friday, 20 November

Partly cloudy. High 63°, low 50°.

Pressure30.12 inHg

Wind12.2 mph S

Humidity57%

Visibility—

Dew point45°

Sat, 2162° / 50°

62 °

Lemont, Saturday, 21 November

Overcast. High 62°, low 50°.

Pressure30.18 inHg

Wind9.5 mph S

Humidity60%

Visibility—

Dew point44°

Sun, 2258° / 51°

0.08

58 °

Lemont, Sunday, 22 November

Light rain. High 58°, low 51°.

Pressure29.71 inHg

Wind16.6 mph SW

Humidity63%

Visibility—

Dew point45°

Mon, 2347° / 39°

47 °

Lemont, Monday, 23 November

Overcast. High 47°, low 39°.

Pressure29.83 inHg

Wind14.2 mph W

Humidity37%

Visibility—

Dew point19°

Tue, 2445° / 38°

45 °

Lemont, Tuesday, 24 November

Overcast. High 45°, low 38°.

Pressure29.88 inHg

Wind10.1 mph NW

Humidity54%

Visibility—

Dew point28°

Wed, 2535° / 28°

35 °

Lemont, Wednesday, 25 November

Overcast. High 35°, low 28°.

Pressure30.18 inHg

Wind13 mph NW

Humidity31%

Visibility—

Dew point5°

Thu, 2631° / 23°

31 °

Lemont, Thursday, 26 November

Mostly clear. High 31°, low 23°.

Pressure30.45 inHg

Wind10 mph W

Humidity32%

Visibility—

Dew point3°

Fri, 2734° / 27°

0.07

34 °

Lemont, Friday, 27 November

Light snow. High 34°, low 27°.

Pressure30.27 inHg

Wind11.9 mph SW

Humidity68%

Visibility—

Dew point24°

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

Sat, 2841° / 29°

0.13

41 °

Lemont, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high41°

Average low29°

Average precipitation0.13 in

Chance of precipitation27%

Record high64° (1990)

Record low5° (2018)

Sun, 2941° / 29°

0.07

41 °

Lemont, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high41°

Average low29°

Average precipitation0.07 in

Chance of precipitation33%

Record high65° (1998)

Record low8° (1976)

Mon, 3042° / 29°

0.09

42 °

Lemont, Monday, 30 November

Climate normal for this date — 60-year average.

Average high42°

Average low29°

Average precipitation0.09 in

Chance of precipitation32%

Record high64° (1998)

Record low12° (1964)

Tue, 0139° / 28°

0.15

39 °

Lemont, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high39°

Average low28°

Average precipitation0.15 in

Chance of precipitation38%

Record high64° (1970)

Record low12° (2025)

Wed, 0240° / 28°

0.06

40 °

Lemont, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high40°

Average low28°

Average precipitation0.06 in

Chance of precipitation30%

Record high68° (1982)

Record low10° (1976)

Thu, 0340° / 28°

0.1

40 °

Lemont, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high40°

Average low28°

Average precipitation0.1 in

Chance of precipitation33%

Record high68° (2012)

Record low8° (2006)

Fri, 0439° / 28°

0.07

39 °

Lemont, Friday, 4 December

Climate normal for this date — 60-year average.

Average high39°

Average low28°

Average precipitation0.07 in

Chance of precipitation27%

Record high65° (1998)

Record low-1° (1991)

Sat, 0539° / 26°

0.09

39 °

Lemont, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high39°

Average low26°

Average precipitation0.09 in

Chance of precipitation30%

Record high66° (2001)

Record low-2° (1991)

Sun, 0637° / 25°

0.06

37 °

Lemont, Sunday, 6 December

Climate normal for this date — 60-year average.

Average high37°

Average low25°

Average precipitation0.06 in

Chance of precipitation23%

Record high62° (1998)

Record low2° (2007)

Mon, 0736° / 25°

0.13

36 °

Lemont, Monday, 7 December

Climate normal for this date — 60-year average.

Average high36°

Average low25°

Average precipitation0.13 in

Chance of precipitation28%

Record high57° (1980)

Record low-3° (1972)

Tue, 0837° / 26°

0.07

37 °

Lemont, Tuesday, 8 December

Climate normal for this date — 60-year average.

Average high37°

Average low26°

Average precipitation0.07 in

Chance of precipitation28%

Record high63° (1991)

Record low3° (2006)

Wed, 0937° / 24°

0.08

37 °

Lemont, Wednesday, 9 December

Climate normal for this date — 60-year average.

Average high37°

Average low24°

Average precipitation0.08 in

Chance of precipitation38%

Record high55° (2023)

Record low-4° (1977)

Thu, 1036° / 24°

0.08

36 °

Lemont, Thursday, 10 December

Climate normal for this date — 60-year average.

Average high36°

Average low24°

Average precipitation0.08 in

Chance of precipitation30%

Record high60° (1971)

Record low-6° (1978)

Fri, 1135° / 24°

0.11

35 °

Lemont, Friday, 11 December

Climate normal for this date — 60-year average.

Average high35°

Average low24°

Average precipitation0.11 in

Chance of precipitation30%

Record high59° (2021)

Record low-11° (1972)

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.