Monthly outlook for Prospect Heights, IL: average high 48.5°, average low 38.6°. That is 1.4° above the climate normal for November. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 4 days and 1.3 inches. The warmest day looks like 10 November (64.5°), the coolest 25 November (28.3°).
48.5°/38.6°
Average high / low
+1.4°
Above normal
3 / 4
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 November – 19 November
50.3°
47.2°
+1.7°
20 November – 29 November
45.6°
43.1°
+1.3°
30 November – 9 December
at normal
38.2°
—
November records over 66 years
73.6°8 November 2020All-time high
1°13 November 2019All-time low
Climate normals and records are computed from the nearest reference point — Park Ridge (8 mi).
Wed, 1160° / 43°0
60 °
Prospect Heights, Wednesday, 11 November
Overcast. High 60°, low 43°.
Pressure29.80 inHg
Wind4.9 mph NE
Humidity71%
Visibility6.2 mi
Dew point46°
Thu, 1245° / 35°0.11
45 °
Prospect Heights, Thursday, 12 November
Light rain. High 45°, low 35°.
Pressure29.94 inHg
Wind13.5 mph N
Humidity89%
Visibility5.2 mi
Dew point35°
Fri, 1343° / 33°0
43 °
Prospect Heights, Friday, 13 November
Clear. High 43°, low 33°.
Pressure30.03 inHg
Wind12 mph N
Humidity63%
Visibility6.2 mi
Dew point25°
Sat, 1442° / 29°0
42 °
Prospect Heights, Saturday, 14 November
Overcast. High 42°, low 29°.
Pressure30.24 inHg
Wind4.6 mph N
Humidity63%
Visibility6.2 mi
Dew point26°
Sun, 1546° / 33°0
46 °
Prospect Heights, Sunday, 15 November
Light rain. High 46°, low 33°.
Pressure30.42 inHg
Wind4.4 mph NW
Humidity69%
Visibility—
Dew point35°
Mon, 1647° / 38°0
47 °
Prospect Heights, Monday, 16 November
Overcast. High 47°, low 38°.
Pressure30.53 inHg
Wind6.1 mph NE
Humidity55%
Visibility—
Dew point31°
Tue, 1750° / 39°0
50 °
Prospect Heights, Tuesday, 17 November
Clear. High 50°, low 39°.
Pressure30.47 inHg
Wind3.1 mph S
Humidity44%
Visibility—
Dew point26°
Wed, 1852° / 40°0
52 °
Prospect Heights, Wednesday, 18 November
Clear. High 52°, low 40°.
Pressure30.42 inHg
Wind6.1 mph SE
Humidity43%
Visibility—
Dew point27°
Thu, 1954° / 42°0
54 °
Prospect Heights, Thursday, 19 November
Overcast. High 54°, low 42°.
Pressure30.33 inHg
Wind8.2 mph S
Humidity35%
Visibility—
Dew point24°
Fri, 2051° / 47°0
51 °
Prospect Heights, Friday, 20 November
Overcast. High 51°, low 47°.
Pressure30.24 inHg
Wind6.2 mph S
Humidity53%
Visibility—
Dew point34°
Sat, 2152° / 49°0.07
52 °
Prospect Heights, Saturday, 21 November
Light rain. High 52°, low 49°.
Pressure30.06 inHg
Wind9.9 mph S
Humidity35%
Visibility—
Dew point25°
Sun, 2251° / 47°0.36
51 °
Prospect Heights, Sunday, 22 November
Rain. High 51°, low 47°.
Pressure29.68 inHg
Wind11.5 mph SW
Humidity93%
Visibility—
Dew point47°
Mon, 2345° / 39°0.01
45 °
Prospect Heights, Monday, 23 November
Light rain. High 45°, low 39°.
Pressure29.59 inHg
Wind12.3 mph SW
Humidity62%
Visibility—
Dew point31°
Tue, 2439° / 33°0.01
39 °
Prospect Heights, Tuesday, 24 November
Light snow. High 39°, low 33°.
Pressure29.85 inHg
Wind14.1 mph W
Humidity63%
Visibility—
Dew point27°
Wed, 2534° / 28°0
34 °
Prospect Heights, Wednesday, 25 November
Mostly clear. High 34°, low 28°.
Pressure30.18 inHg
Wind12.8 mph W
Humidity42%
Visibility—
Dew point12°
From day 17 onward the outlook is built from 60-year climate statistics
Thu, 2643° / 32°0.12
43 °
Prospect Heights, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.12 in
Chance of precipitation42%
Record high62° (1990)
Record low8° (1977)
Fri, 2742° / 32°0.21
42 °
Prospect Heights, Friday, 27 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.21 in
Chance of precipitation50%
Record high65° (1990)
Record low15° (2018)
Sat, 2840° / 29°0.12
40 °
Prospect Heights, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.12 in
Chance of precipitation28%
Record high63° (1990)
Record low2° (2018)
Sun, 2941° / 30°0.07
41 °
Prospect Heights, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high41°
Average low30°
Average precipitation0.07 in
Chance of precipitation33%
Record high64° (1998)
Record low10° (1976)
Mon, 3042° / 30°0.08
42 °
Prospect Heights, Monday, 30 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.08 in
Chance of precipitation30%
Record high64° (1998)
Record low13° (1976)
Tue, 0139° / 29°0.16
39 °
Prospect Heights, Tuesday, 1 December
Climate normal for this date — 60-year average.
Average high39°
Average low29°
Average precipitation0.16 in
Chance of precipitation42%
Record high63° (1970)
Record low9° (2025)
Wed, 0240° / 29°0.07
40 °
Prospect Heights, Wednesday, 2 December
Climate normal for this date — 60-year average.
Average high40°
Average low29°
Average precipitation0.07 in
Chance of precipitation33%
Record high66° (1982)
Record low10° (1976)
Thu, 0339° / 29°0.08
39 °
Prospect Heights, Thursday, 3 December
Climate normal for this date — 60-year average.
Average high39°
Average low29°
Average precipitation0.08 in
Chance of precipitation33%
Record high67° (2012)
Record low9° (2006)
Fri, 0438° / 28°0.06
38 °
Prospect Heights, Friday, 4 December
Climate normal for this date — 60-year average.
Average high38°
Average low28°
Average precipitation0.06 in
Chance of precipitation28%
Record high63° (1998)
Record low1° (1991)
Sat, 0539° / 27°0.09
39 °
Prospect Heights, Saturday, 5 December
Climate normal for this date — 60-year average.
Average high39°
Average low27°
Average precipitation0.09 in
Chance of precipitation32%
Record high65° (2001)
Record low0° (1991)
Sun, 0637° / 26°0.06
37 °
Prospect Heights, Sunday, 6 December
Climate normal for this date — 60-year average.
Average high37°
Average low26°
Average precipitation0.06 in
Chance of precipitation27%
Record high60° (1998)
Record low6° (1972)
Mon, 0735° / 26°0.13
35 °
Prospect Heights, Monday, 7 December
Climate normal for this date — 60-year average.
Average high35°
Average low26°
Average precipitation0.13 in
Chance of precipitation27%
Record high56° (1980)
Record low4° (1972)
Tue, 0836° / 27°0.08
36 °
Prospect Heights, Tuesday, 8 December
Climate normal for this date — 60-year average.
Average high36°
Average low27°
Average precipitation0.08 in
Chance of precipitation27%
Record high61° (1991)
Record low4° (2006)
Wed, 0937° / 26°0.09
37 °
Prospect Heights, Wednesday, 9 December
Climate normal for this date — 60-year average.
Average high37°
Average low26°
Average precipitation0.09 in
Chance of precipitation40%
Record high53° (2023)
Record low-3° (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 Prospect Heights, 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 Prospect Heights, 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.