Monthly outlook for Hillside, IL: average high 67.7°, average low 53°. That is 3.8° above the climate normal for October. Precipitation is expected on 3 days (about 1.8 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 12 October (81.8°), the coolest 18 October (43.5°).
67.7°/53°
Average high / low
+3.8°
Above normal
3 / 5
Wet days / normal
1.8 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 October – 18 October
68.5°
62.1°
+3.5°
19 October – 28 October
66.5°
57.9°
+4.8°
29 October – 7 November
at normal
54.1°
—
October records over 66 years
87.6°3 October 2025All-time high
25.5°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Bellwood (2 mi).
Sat, 1078° / 60°0
78 °
Hillside, Saturday, 10 October
Overcast. High 78°, low 60°.
Pressure30.09 inHg
Wind7 mph S
Humidity58%
Visibility6.2 mi
Dew point56°
Sun, 1170° / 58°0
70 °
Hillside, Sunday, 11 October
Overcast. High 70°, low 58°.
Pressure29.94 inHg
Wind3.6 mph NE
Humidity71%
Visibility6.2 mi
Dew point57°
Mon, 1282° / 58°0
82 °
Hillside, Monday, 12 October
Clear. High 82°, low 58°.
Pressure29.83 inHg
Wind8.9 mph SW
Humidity62%
Visibility6.2 mi
Dew point63°
Tue, 1377° / 62°0.15
77 °
Hillside, Tuesday, 13 October
Light rain. High 77°, low 62°.
Pressure29.80 inHg
Wind7.8 mph NE
Humidity76%
Visibility—
Dew point67°
Wed, 1465° / 61°0.93
65 °
Hillside, Wednesday, 14 October
Heavy rain. High 65°, low 61°.
Pressure29.88 inHg
Wind8.7 mph NE
Humidity95%
Visibility—
Dew point64°
Thu, 1571° / 58°0.63
71 °
Hillside, Thursday, 15 October
Rain. High 71°, low 58°.
Pressure29.83 inHg
Wind15.3 mph S
Humidity94%
Visibility—
Dew point61°
Fri, 1664° / 47°0
64 °
Hillside, Friday, 16 October
Overcast. High 64°, low 47°.
Pressure29.94 inHg
Wind16.8 mph W
Humidity39%
Visibility—
Dew point30°
Sat, 1748° / 44°0
48 °
Hillside, Saturday, 17 October
Overcast. High 48°, low 44°.
Pressure30.27 inHg
Wind11.3 mph W
Humidity53%
Visibility—
Dew point31°
Sun, 1856° / 44°0
56 °
Hillside, Sunday, 18 October
Partly cloudy. High 56°, low 44°.
Pressure30.33 inHg
Wind7 mph SW
Humidity37%
Visibility—
Dew point28°
Mon, 1963° / 46°0
63 °
Hillside, Monday, 19 October
Overcast. High 63°, low 46°.
Pressure30.36 inHg
Wind3.8 mph SW
Humidity33%
Visibility—
Dew point29°
Tue, 2066° / 50°0
66 °
Hillside, Tuesday, 20 October
Clear. High 66°, low 50°.
Pressure30.39 inHg
Wind5.5 mph E
Humidity24%
Visibility—
Dew point25°
Wed, 2169° / 51°0
69 °
Hillside, Wednesday, 21 October
Clear. High 69°, low 51°.
Pressure30.30 inHg
Wind3.8 mph E
Humidity25%
Visibility—
Dew point28°
Thu, 2268° / 53°0
68 °
Hillside, Thursday, 22 October
Clear. High 68°, low 53°.
Pressure30.24 inHg
Wind6.3 mph NE
Humidity30%
Visibility—
Dew point33°
Fri, 2367° / 53°0
67 °
Hillside, Friday, 23 October
Clear. High 67°, low 53°.
Pressure30.21 inHg
Wind7.2 mph NE
Humidity43%
Visibility—
Dew point42°
Sat, 2467° / 53°0
67 °
Hillside, Saturday, 24 October
Clear. High 67°, low 53°.
Pressure30.12 inHg
Wind6.4 mph E
Humidity29%
Visibility—
Dew point32°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 2557° / 44°0.11
57 °
Hillside, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1963)
Record low31° (1962)
Mon, 2656° / 44°0.11
56 °
Hillside, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.11 in
Chance of precipitation28%
Record high79° (1963)
Record low26° (1962)
Tue, 2756° / 43°0.09
56 °
Hillside, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.09 in
Chance of precipitation33%
Record high75° (2014)
Record low29° (1980)
Wed, 2856° / 43°0.05
56 °
Hillside, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.05 in
Chance of precipitation20%
Record high74° (1999)
Record low27° (1976)
Thu, 2956° / 43°0.06
56 °
Hillside, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.06 in
Chance of precipitation20%
Record high79° (2024)
Record low29° (1980)
Fri, 3057° / 43°0.11
57 °
Hillside, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low43°
Average precipitation0.11 in
Chance of precipitation30%
Record high77° (1971)
Record low28° (1988)
Sat, 3156° / 44°0.12
56 °
Hillside, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.12 in
Chance of precipitation38%
Record high74° (1974)
Record low26° (2023)
Sun, 0155° / 42°0.16
55 °
Hillside, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.16 in
Chance of precipitation38%
Record high73° (2016)
Record low19° (2019)
Mon, 0254° / 41°0.11
54 °
Hillside, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.11 in
Chance of precipitation38%
Record high74° (1961)
Record low24° (1991)
Tue, 0353° / 40°0.06
53 °
Hillside, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.06 in
Chance of precipitation25%
Record high73° (1987)
Record low18° (1991)
Wed, 0453° / 42°0.09
53 °
Hillside, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2015)
Record low17° (1991)
Thu, 0553° / 40°0.11
53 °
Hillside, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1978)
Record low19° (1991)
Fri, 0653° / 39°0.07
53 °
Hillside, Friday, 6 November
Climate normal for this date — 60-year average.
Average high53°
Average low39°
Average precipitation0.07 in
Chance of precipitation30%
Record high72° (1975)
Record low24° (1991)
Sat, 0752° / 39°0.05
52 °
Hillside, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.05 in
Chance of precipitation17%
Record high69° (2020)
Record low19° (1991)
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 Hillside, 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 Hillside, 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.