Monthly outlook for Glen Oak, IL: average high 59°, average low 48°. That is 2.7° above the climate normal for October. Precipitation is expected on 4 days (about 1.1 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 25 October (71.8°), the coolest 6 November (29.1°).
59°/48°
Average high / low
+2.7°
Above normal
4 / 5
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
24 October – 2 November
65.6°
55.6°
+5.6°
3 November – 12 November
48.1°
50.5°
-1.3°
13 November – 22 November
at normal
46.1°
—
October records over 66 years
87.4°3 October 2025All-time high
22.5°24 October 1981All-time low
Climate normals and records are computed from the nearest reference point — Glendale Heights (3 mi).
Sun, 2572° / 48°0
72 °
Glen Oak, Sunday, 25 October
Overcast. High 72°, low 48°.
Pressure30.39 inHg
Wind5.1 mph S
Humidity65%
Visibility6.2 mi
Dew point53°
Mon, 2664° / 50°0
64 °
Glen Oak, Monday, 26 October
Overcast. High 64°, low 50°.
Pressure30.36 inHg
Wind5.7 mph NE
Humidity81%
Visibility6.2 mi
Dew point55°
Tue, 2766° / 50°0
66 °
Glen Oak, Tuesday, 27 October
Overcast. High 66°, low 50°.
Pressure30.27 inHg
Wind5.3 mph E
Humidity76%
Visibility6.2 mi
Dew point55°
Wed, 2870° / 54°0
70 °
Glen Oak, Wednesday, 28 October
Clear. High 70°, low 54°.
Pressure30.18 inHg
Wind8.9 mph S
Humidity62%
Visibility—
Dew point53°
Thu, 2969° / 56°0.06
69 °
Glen Oak, Thursday, 29 October
Light rain. High 69°, low 56°.
Pressure30.15 inHg
Wind8.5 mph SW
Humidity65%
Visibility—
Dew point55°
Fri, 3061° / 59°0.02
61 °
Glen Oak, Friday, 30 October
Light rain. High 61°, low 59°.
Pressure30.21 inHg
Wind7.4 mph NE
Humidity83%
Visibility—
Dew point55°
Sat, 3164° / 57°0.31
64 °
Glen Oak, Saturday, 31 October
Rain. High 64°, low 57°.
Pressure30.09 inHg
Wind10.3 mph SW
Humidity74%
Visibility—
Dew point53°
Sun, 0162° / 56°0.21
62 °
Glen Oak, Sunday, 1 November
Light rain. High 62°, low 56°.
Pressure30.03 inHg
Wind9.1 mph S
Humidity87%
Visibility—
Dew point56°
Mon, 0260° / 55°0
60 °
Glen Oak, Monday, 2 November
Overcast. High 60°, low 55°.
Pressure30.12 inHg
Wind10 mph NE
Humidity64%
Visibility—
Dew point47°
Tue, 0356° / 53°0.45
56 °
Glen Oak, Tuesday, 3 November
Rain. High 56°, low 53°.
Pressure29.85 inHg
Wind12.7 mph NE
Humidity93%
Visibility—
Dew point51°
Wed, 0457° / 48°0
57 °
Glen Oak, Wednesday, 4 November
Partly cloudy. High 57°, low 48°.
Pressure29.94 inHg
Wind12.2 mph NE
Humidity45%
Visibility—
Dew point35°
Thu, 0546° / 35°0
46 °
Glen Oak, Thursday, 5 November
Clear. High 46°, low 35°.
Pressure29.97 inHg
Wind14.8 mph N
Humidity37%
Visibility—
Dew point20°
Fri, 0639° / 29°0
39 °
Glen Oak, Friday, 6 November
Clear. High 39°, low 29°.
Pressure30.33 inHg
Wind11.7 mph NW
Humidity36%
Visibility—
Dew point12°
Sat, 0741° / 30°0
41 °
Glen Oak, Saturday, 7 November
Partly cloudy. High 41°, low 30°.
Pressure30.45 inHg
Wind14.4 mph S
Humidity35%
Visibility—
Dew point13°
Sun, 0850° / 39°0.02
50 °
Glen Oak, Sunday, 8 November
Light rain. High 50°, low 39°.
Pressure30.00 inHg
Wind16.2 mph S
Humidity57%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 0951° / 38°0.11
51 °
Glen Oak, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.11 in
Chance of precipitation35%
Record high72° (1999)
Record low17° (1991)
Tue, 1050° / 37°0.1
50 °
Glen Oak, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation32%
Record high72° (2020)
Record low17° (2017)
Wed, 1147° / 34°0.07
47 °
Glen Oak, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.07 in
Chance of precipitation28%
Record high70° (1964)
Record low15° (2019)
Thu, 1246° / 33°0.06
46 °
Glen Oak, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.06 in
Chance of precipitation22%
Record high66° (1964)
Record low2° (2019)
Fri, 1346° / 33°0.04
46 °
Glen Oak, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.04 in
Chance of precipitation17%
Record high69° (1999)
Record low3° (2019)
Sat, 1447° / 33°0.07
47 °
Glen Oak, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.07 in
Chance of precipitation30%
Record high69° (1971)
Record low13° (1986)
Sun, 1547° / 34°0.09
47 °
Glen Oak, Sunday, 15 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.09 in
Chance of precipitation28%
Record high69° (2025)
Record low19° (1982)
Mon, 1647° / 33°0.05
47 °
Glen Oak, Monday, 16 November
Climate normal for this date — 60-year average.
Average high47°
Average low33°
Average precipitation0.05 in
Chance of precipitation18%
Record high63° (1988)
Record low20° (1997)
Tue, 1747° / 34°0.08
47 °
Glen Oak, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.08 in
Chance of precipitation30%
Record high70° (2016)
Record low15° (2014)
Wed, 1847° / 35°0.11
47 °
Glen Oak, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.11 in
Chance of precipitation28%
Record high67° (1999)
Record low11° (2014)
Thu, 1947° / 34°0.07
47 °
Glen Oak, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.07 in
Chance of precipitation30%
Record high65° (1983)
Record low17° (2014)
Fri, 2045° / 33°0.08
45 °
Glen Oak, Friday, 20 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.08 in
Chance of precipitation28%
Record high63° (2003)
Record low14° (2022)
Sat, 2144° / 31°0.1
44 °
Glen Oak, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.1 in
Chance of precipitation25%
Record high66° (1990)
Record low9° (1964)
Sun, 2244° / 30°0.04
44 °
Glen Oak, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high44°
Average low30°
Average precipitation0.04 in
Chance of precipitation20%
Record high67° (2010)
Record low4° (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 Glen Oak, 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 Glen Oak, 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.