Monthly outlook for Chicago Heights, IL: average high 60.2°, average low 49.9°. That is 4.4° above the climate normal for October. Precipitation is expected on 5 days (about 1.2 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 3 November (70.3°), the coolest 6 November (39.1°).
60.2°/49.9°
Average high / low
+4.4°
Above normal
5 / 5
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
29 October – 7 November
60.7°
54°
+3.7°
8 November – 17 November
59.4°
48.5°
+6.1°
18 November – 27 November
at normal
44.9°
—
October records over 66 years
88.5°3 October 2025All-time high
26.1°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Blue Island (10 mi).
Fri, 3065° / 50°0
65 °
Chicago Heights, Friday, 30 October
Light rain. High 65°, low 50°.
Pressure30.36 inHg
Wind5 mph E
Humidity64%
Visibility6.2 mi
Dew point48°
Sat, 3154° / 51°0.44
54 °
Chicago Heights, Saturday, 31 October
Rain. High 54°, low 51°.
Pressure30.36 inHg
Wind7.3 mph SE
Humidity88%
Visibility3.4 mi
Dew point50°
Sun, 0163° / 51°0
63 °
Chicago Heights, Sunday, 1 November
Overcast. High 63°, low 51°.
Pressure30.33 inHg
Wind3.2 mph SE
Humidity63%
Visibility6.2 mi
Dew point50°
Mon, 0261° / 54°0.01
61 °
Chicago Heights, Monday, 2 November
Light rain. High 61°, low 54°.
Pressure30.12 inHg
Wind10.5 mph S
Humidity77%
Visibility—
Dew point51°
Tue, 0370° / 59°0.05
70 °
Chicago Heights, Tuesday, 3 November
Light rain. High 70°, low 59°.
Pressure29.88 inHg
Wind15 mph S
Humidity72%
Visibility—
Dew point58°
Wed, 0467° / 59°0.36
67 °
Chicago Heights, Wednesday, 4 November
Rain. High 67°, low 59°.
Pressure29.65 inHg
Wind18.2 mph S
Humidity89%
Visibility—
Dew point60°
Thu, 0551° / 44°0.02
51 °
Chicago Heights, Thursday, 5 November
Light rain. High 51°, low 44°.
Pressure29.83 inHg
Wind13.8 mph W
Humidity42%
Visibility—
Dew point28°
Fri, 0652° / 39°0
52 °
Chicago Heights, Friday, 6 November
Clear. High 52°, low 39°.
Pressure29.97 inHg
Wind11.7 mph W
Humidity34%
Visibility—
Dew point22°
Sat, 0754° / 40°0
54 °
Chicago Heights, Saturday, 7 November
Overcast. High 54°, low 40°.
Pressure30.18 inHg
Wind5.3 mph E
Humidity37%
Visibility—
Dew point25°
Sun, 0861° / 46°0
61 °
Chicago Heights, Sunday, 8 November
Overcast. High 61°, low 46°.
Pressure30.12 inHg
Wind10.7 mph SE
Humidity50%
Visibility—
Dew point38°
Mon, 0954° / 51°0.29
54 °
Chicago Heights, Monday, 9 November
Rain. High 54°, low 51°.
Pressure29.91 inHg
Wind10.6 mph SE
Humidity84%
Visibility—
Dew point46°
Tue, 1054° / 51°0.06
54 °
Chicago Heights, Tuesday, 10 November
Light rain. High 54°, low 51°.
Pressure30.03 inHg
Wind8.7 mph N
Humidity85%
Visibility—
Dew point50°
Wed, 1157° / 50°0
57 °
Chicago Heights, Wednesday, 11 November
Overcast. High 57°, low 50°.
Pressure30.09 inHg
Wind8.8 mph SW
Humidity69%
Visibility—
Dew point45°
Thu, 1262° / 49°0
62 °
Chicago Heights, Thursday, 12 November
Overcast. High 62°, low 49°.
Pressure29.88 inHg
Wind10.7 mph W
Humidity58%
Visibility—
Dew point44°
Fri, 1368° / 52°0
68 °
Chicago Heights, Friday, 13 November
Partly cloudy. High 68°, low 52°.
Pressure29.83 inHg
Wind7.1 mph S
Humidity55%
Visibility—
Dew point47°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 1448° / 35°0.07
48 °
Chicago Heights, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.07 in
Chance of precipitation33%
Record high68° (1971)
Record low15° (1986)
Sun, 1547° / 36°0.1
47 °
Chicago Heights, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.1 in
Chance of precipitation32%
Record high67° (2025)
Record low21° (1982)
Mon, 1647° / 35°0.05
47 °
Chicago Heights, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.05 in
Chance of precipitation25%
Record high63° (2023)
Record low22° (1997)
Tue, 1747° / 36°0.09
47 °
Chicago Heights, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.09 in
Chance of precipitation30%
Record high68° (2016)
Record low17° (2014)
Wed, 1848° / 36°0.15
48 °
Chicago Heights, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.15 in
Chance of precipitation30%
Record high66° (2016)
Record low12° (2014)
Thu, 1947° / 36°0.08
47 °
Chicago Heights, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high47°
Average low36°
Average precipitation0.08 in
Chance of precipitation35%
Record high65° (1985)
Record low19° (2014)
Fri, 2046° / 35°0.1
46 °
Chicago Heights, Friday, 20 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation37%
Record high62° (2003)
Record low14° (2022)
Sat, 2145° / 34°0.11
45 °
Chicago Heights, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high45°
Average low34°
Average precipitation0.11 in
Chance of precipitation27%
Record high65° (1990)
Record low11° (1964)
Sun, 2245° / 33°0.05
45 °
Chicago Heights, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.05 in
Chance of precipitation18%
Record high67° (2010)
Record low11° (2015)
Mon, 2345° / 33°0.09
45 °
Chicago Heights, Monday, 23 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.09 in
Chance of precipitation28%
Record high63° (2003)
Record low14° (1970)
Tue, 2443° / 32°0.08
43 °
Chicago Heights, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.08 in
Chance of precipitation28%
Record high65° (1966)
Record low15° (1970)
Wed, 2544° / 33°0.08
44 °
Chicago Heights, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.08 in
Chance of precipitation37%
Record high59° (1966)
Record low18° (2005)
Thu, 2644° / 32°0.13
44 °
Chicago Heights, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.13 in
Chance of precipitation43%
Record high62° (1990)
Record low8° (1977)
Fri, 2743° / 32°0.22
43 °
Chicago Heights, Friday, 27 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.22 in
Chance of precipitation47%
Record high65° (1990)
Record low16° (1977)
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 Chicago 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 Chicago 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.