Monthly outlook for Westmont, IL: average high 48°, average low 37.8°. That is 0.8° above the climate normal for November. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 10 November (62.1°), the coolest 25 November (28.3°).
48°/37.8°
Average high / low
+0.8°
Above normal
4 / 5
Wet days / normal
0.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 November – 19 November
49.7°
47.7°
+1.1°
20 November – 29 November
45.1°
43.5°
+0.9°
30 November – 9 December
at normal
38.3°
—
November records over 66 years
74.8°5 November 1978All-time high
2.3°13 November 2019All-time low
Climate normals and records are computed from the nearest reference point — La Grange (5 mi).
Wed, 1159° / 41°0.12
59 °
Westmont, Wednesday, 11 November
Rain. High 59°, low 41°.
Pressure29.77 inHg
Wind3.6 mph NE
Humidity74%
Visibility6.2 mi
Dew point47°
Thu, 1243° / 35°0.05
43 °
Westmont, Thursday, 12 November
Light rain. High 43°, low 35°.
Pressure29.94 inHg
Wind16.4 mph N
Humidity80%
Visibility4.8 mi
Dew point34°
Fri, 1342° / 33°0
42 °
Westmont, Friday, 13 November
Clear. High 42°, low 33°.
Pressure30.03 inHg
Wind10.9 mph N
Humidity64%
Visibility6.2 mi
Dew point26°
Sat, 1443° / 29°0
43 °
Westmont, Saturday, 14 November
Mostly clear. High 43°, low 29°.
Pressure30.24 inHg
Wind5.9 mph NW
Humidity67%
Visibility—
Dew point29°
Sun, 1546° / 30°0
46 °
Westmont, Sunday, 15 November
Partly cloudy. High 46°, low 30°.
Pressure30.42 inHg
Wind3.8 mph NE
Humidity60%
Visibility—
Dew point31°
Mon, 1648° / 37°0
48 °
Westmont, Monday, 16 November
Overcast. High 48°, low 37°.
Pressure30.53 inHg
Wind5.8 mph NE
Humidity54%
Visibility—
Dew point31°
Tue, 1749° / 38°0
49 °
Westmont, Tuesday, 17 November
Clear. High 49°, low 38°.
Pressure30.47 inHg
Wind3.2 mph S
Humidity47%
Visibility—
Dew point27°
Wed, 1851° / 38°0
51 °
Westmont, Wednesday, 18 November
Clear. High 51°, low 38°.
Pressure30.42 inHg
Wind6.5 mph S
Humidity47%
Visibility—
Dew point29°
Thu, 1954° / 40°0
54 °
Westmont, Thursday, 19 November
Overcast. High 54°, low 40°.
Pressure30.33 inHg
Wind8.7 mph S
Humidity37%
Visibility—
Dew point25°
Fri, 2052° / 46°0
52 °
Westmont, Friday, 20 November
Overcast. High 52°, low 46°.
Pressure30.27 inHg
Wind7.3 mph SW
Humidity51%
Visibility—
Dew point34°
Sat, 2151° / 47°0.07
51 °
Westmont, Saturday, 21 November
Light rain. High 51°, low 47°.
Pressure30.06 inHg
Wind10.7 mph S
Humidity40%
Visibility—
Dew point27°
Sun, 2251° / 46°0.44
51 °
Westmont, Sunday, 22 November
Rain. High 51°, low 46°.
Pressure29.68 inHg
Wind12.8 mph S
Humidity94%
Visibility—
Dew point47°
Mon, 2344° / 39°0.01
44 °
Westmont, Monday, 23 November
Light rain. High 44°, low 39°.
Pressure29.62 inHg
Wind13.9 mph SW
Humidity59%
Visibility—
Dew point30°
Tue, 2439° / 33°0.01
39 °
Westmont, Tuesday, 24 November
Light snow. High 39°, low 33°.
Pressure29.88 inHg
Wind13.7 mph W
Humidity65%
Visibility—
Dew point28°
Wed, 2534° / 28°0
34 °
Westmont, Wednesday, 25 November
Overcast. High 34°, low 28°.
Pressure30.21 inHg
Wind13 mph W
Humidity43%
Visibility—
Dew point12°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2644° / 31°0.13
44 °
Westmont, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.13 in
Chance of precipitation45%
Record high63° (1990)
Record low5° (1977)
Fri, 2743° / 31°0.22
43 °
Westmont, Friday, 27 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.22 in
Chance of precipitation47%
Record high66° (1990)
Record low12° (1977)
Sat, 2840° / 29°0.14
40 °
Westmont, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.14 in
Chance of precipitation28%
Record high64° (1990)
Record low5° (2018)
Sun, 2941° / 29°0.08
41 °
Westmont, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high41°
Average low29°
Average precipitation0.08 in
Chance of precipitation32%
Record high65° (1998)
Record low8° (1976)
Mon, 3042° / 29°0.09
42 °
Westmont, Monday, 30 November
Climate normal for this date — 60-year average.
Average high42°
Average low29°
Average precipitation0.09 in
Chance of precipitation28%
Record high65° (1998)
Record low12° (1976)
Tue, 0139° / 28°0.15
39 °
Westmont, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.15 in
Chance of precipitation40%
Record high64° (1970)
Record low11° (2025)
Wed, 0240° / 28°0.07
40 °
Westmont, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.07 in
Chance of precipitation33%
Record high68° (1982)
Record low9° (1976)
Thu, 0339° / 28°0.09
39 °
Westmont, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.09 in
Chance of precipitation33%
Record high68° (2012)
Record low6° (2006)
Fri, 0439° / 27°0.07
39 °
Westmont, Friday, 4 December
Climate normal for this date — 60-year average.
Average high39°
Average low27°
Average precipitation0.07 in
Chance of precipitation27%
Record high64° (1998)
Record low-2° (1991)
Sat, 0539° / 26°0.09
39 °
Westmont, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high39°
Average low26°
Average precipitation0.09 in
Chance of precipitation32%
Record high66° (2001)
Record low-2° (1991)
Sun, 0637° / 25°0.07
37 °
Westmont, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high37°
Average low25°
Average precipitation0.07 in
Chance of precipitation27%
Record high62° (1998)
Record low4° (2005)
Mon, 0735° / 25°0.13
35 °
Westmont, Monday, 7 December
Climate normal for this date — 60-year average.
Average high35°
Average low25°
Average precipitation0.13 in
Chance of precipitation27%
Record high57° (1980)
Record low-3° (1972)
Tue, 0836° / 26°0.08
36 °
Westmont, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high36°
Average low26°
Average precipitation0.08 in
Chance of precipitation28%
Record high63° (1991)
Record low2° (2006)
Wed, 0937° / 24°0.09
37 °
Westmont, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high37°
Average low24°
Average precipitation0.09 in
Chance of precipitation40%
Record high53° (2023)
Record low-4° (1995)
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 Westmont, 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 Westmont, 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.