Monthly outlook for Des Plaines, IL: average high 62.1°, average low 48.8°. That is 1.2° above the climate normal for October. Precipitation is expected on 4 days (about 0.5 inches), against a normal of 5 days and 1.8 inches. The warmest day looks like 10 October (80.3°), the coolest 18 October (33.8°).
62.1°/48.8°
Average high / low
+1.2°
Above normal
4 / 5
Wet days / normal
0.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
10 October – 19 October
64.2°
60.9°
+1.8°
20 October – 29 October
58.6°
57.1°
+0.8°
30 October – 8 November
at normal
53.2°
—
October records over 66 years
88.2°3 October 2025All-time high
26.2°31 October 2023All-time low
Climate normals and records are computed from the nearest reference point — Park Ridge (3 mi).
Sun, 1175° / 59°0
75 °
Des Plaines, Sunday, 11 October
Clear. High 75°, low 59°.
Pressure29.97 inHg
Wind3.5 mph S
Humidity63%
Visibility6.2 mi
Dew point57°
Mon, 1280° / 61°0
80 °
Des Plaines, Monday, 12 October
Clear. High 80°, low 61°.
Pressure29.83 inHg
Wind9.2 mph SW
Humidity63%
Visibility6.2 mi
Dew point62°
Tue, 1377° / 61°0
77 °
Des Plaines, Tuesday, 13 October
Overcast. High 77°, low 61°.
Pressure29.80 inHg
Wind10.4 mph NW
Humidity71%
Visibility6.2 mi
Dew point67°
Wed, 1461° / 56°0.09
61 °
Des Plaines, Wednesday, 14 October
Light rain. High 61°, low 56°.
Pressure30.15 inHg
Wind8.6 mph NE
Humidity79%
Visibility6.2 mi
Dew point54°
Thu, 1558° / 54°0
58 °
Des Plaines, Thursday, 15 October
Overcast. High 58°, low 54°.
Pressure30.33 inHg
Wind9.8 mph E
Humidity70%
Visibility—
Dew point47°
Fri, 1661° / 42°0.04
61 °
Des Plaines, Friday, 16 October
Light rain. High 61°, low 42°.
Pressure29.74 inHg
Wind19.6 mph W
Humidity42%
Visibility—
Dew point32°
Sat, 1744° / 36°0
44 °
Des Plaines, Saturday, 17 October
Overcast. High 44°, low 36°.
Pressure30.24 inHg
Wind15.6 mph W
Humidity46%
Visibility—
Dew point23°
Sun, 1849° / 34°0
49 °
Des Plaines, Sunday, 18 October
Mostly clear. High 49°, low 34°.
Pressure30.50 inHg
Wind9.6 mph N
Humidity31%
Visibility—
Dew point17°
Mon, 1957° / 42°0
57 °
Des Plaines, Monday, 19 October
Overcast. High 57°, low 42°.
Pressure30.36 inHg
Wind11.2 mph SW
Humidity31%
Visibility—
Dew point22°
Tue, 2061° / 47°0
61 °
Des Plaines, Tuesday, 20 October
Overcast. High 61°, low 47°.
Pressure30.27 inHg
Wind9.9 mph S
Humidity25%
Visibility—
Dew point22°
Wed, 2158° / 51°0.11
58 °
Des Plaines, Wednesday, 21 October
Light rain. High 58°, low 51°.
Pressure29.94 inHg
Wind12 mph SW
Humidity47%
Visibility—
Dew point38°
Thu, 2264° / 47°0
64 °
Des Plaines, Thursday, 22 October
Clear. High 64°, low 47°.
Pressure30.06 inHg
Wind12.2 mph SW
Humidity41%
Visibility—
Dew point35°
Fri, 2357° / 46°0
57 °
Des Plaines, Friday, 23 October
Clear. High 57°, low 46°.
Pressure30.15 inHg
Wind9.6 mph NW
Humidity33%
Visibility—
Dew point25°
Sat, 2456° / 44°0
56 °
Des Plaines, Saturday, 24 October
Overcast. High 56°, low 44°.
Pressure30.21 inHg
Wind5.5 mph E
Humidity30%
Visibility—
Dew point22°
Sun, 2555° / 43°0.29
55 °
Des Plaines, Sunday, 25 October
Rain. High 55°, low 43°.
Pressure29.68 inHg
Wind12.5 mph NW
Humidity95%
Visibility—
Dew point53°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2656° / 45°0.11
56 °
Des Plaines, Monday, 26 October
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.11 in
Chance of precipitation28%
Record high78° (1963)
Record low27° (1962)
Tue, 2756° / 44°0.09
56 °
Des Plaines, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.09 in
Chance of precipitation33%
Record high74° (2014)
Record low31° (1980)
Wed, 2855° / 44°0.05
55 °
Des Plaines, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.05 in
Chance of precipitation20%
Record high72° (1999)
Record low29° (1976)
Thu, 2955° / 43°0.06
55 °
Des Plaines, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.06 in
Chance of precipitation22%
Record high79° (2024)
Record low30° (1988)
Fri, 3057° / 44°0.11
57 °
Des Plaines, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low44°
Average precipitation0.11 in
Chance of precipitation30%
Record high77° (2024)
Record low29° (2020)
Sat, 3156° / 44°0.14
56 °
Des Plaines, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.14 in
Chance of precipitation40%
Record high72° (1974)
Record low26° (2023)
Sun, 0155° / 43°0.16
55 °
Des Plaines, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.16 in
Chance of precipitation43%
Record high72° (2016)
Record low18° (2019)
Mon, 0254° / 42°0.12
54 °
Des Plaines, Monday, 2 November
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.12 in
Chance of precipitation38%
Record high73° (1961)
Record low24° (1991)
Tue, 0353° / 41°0.06
53 °
Des Plaines, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.06 in
Chance of precipitation22%
Record high71° (1987)
Record low18° (1991)
Wed, 0452° / 42°0.09
52 °
Des Plaines, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low42°
Average precipitation0.09 in
Chance of precipitation27%
Record high70° (2022)
Record low17° (1991)
Thu, 0553° / 41°0.13
53 °
Des Plaines, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high53°
Average low41°
Average precipitation0.13 in
Chance of precipitation33%
Record high73° (1978)
Record low20° (1991)
Fri, 0652° / 39°0.07
52 °
Des Plaines, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.07 in
Chance of precipitation30%
Record high71° (1975)
Record low24° (1991)
Sat, 0751° / 39°0.05
51 °
Des Plaines, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.05 in
Chance of precipitation22%
Record high69° (2020)
Record low20° (1991)
Sun, 0851° / 39°0.05
51 °
Des Plaines, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.05 in
Chance of precipitation18%
Record high74° (2020)
Record low17° (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 Des Plaines, 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 Des Plaines, 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.