Monthly outlook for Des Plaines, IL: average high 63.3°, average low 49.3°. That is 3.3° above the climate normal for October. Precipitation is expected on 2 days (about 1.3 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 24 October (73.9°), the coolest 17 October (38.8°).
63.3°/49.3°
Average high / low
+3.3°
Above normal
2 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
16 October – 25 October
64.4°
58.5°
+3.3°
26 October – 4 November
61.5°
54.7°
+3.8°
5 November – 14 November
at normal
49.5°
—
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).
Sat, 1755° / 39°0
55 °
Des Plaines, Saturday, 17 October
Clear. High 55°, low 39°.
Pressure30.53 inHg
Wind4.5 mph SW
Humidity46%
Visibility6.2 mi
Dew point31°
Sun, 1860° / 42°0
60 °
Des Plaines, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.47 inHg
Wind11 mph SW
Humidity58%
Visibility6.2 mi
Dew point42°
Mon, 1962° / 42°0
62 °
Des Plaines, Monday, 19 October
Clear. High 62°, low 42°.
Pressure30.42 inHg
Wind4 mph S
Humidity56%
Visibility6.2 mi
Dew point43°
Tue, 2063° / 43°0
63 °
Des Plaines, Tuesday, 20 October
Mostly clear. High 63°, low 43°.
Pressure30.39 inHg
Wind4.9 mph E
Humidity44%
Visibility—
Dew point38°
Wed, 2165° / 44°0
65 °
Des Plaines, Wednesday, 21 October
Clear. High 65°, low 44°.
Pressure30.33 inHg
Wind4.3 mph SE
Humidity50%
Visibility—
Dew point42°
Thu, 2261° / 56°0.02
61 °
Des Plaines, Thursday, 22 October
Light rain. High 61°, low 56°.
Pressure30.18 inHg
Wind4.8 mph SW
Humidity68%
Visibility—
Dew point49°
Fri, 2373° / 55°0
73 °
Des Plaines, Friday, 23 October
Clear. High 73°, low 55°.
Pressure30.21 inHg
Wind4.5 mph SE
Humidity27%
Visibility—
Dew point33°
Sat, 2474° / 58°0
74 °
Des Plaines, Saturday, 24 October
Mostly clear. High 74°, low 58°.
Pressure30.21 inHg
Wind6 mph S
Humidity32%
Visibility—
Dew point39°
Sun, 2573° / 58°0
73 °
Des Plaines, Sunday, 25 October
Partly cloudy. High 73°, low 58°.
Pressure30.18 inHg
Wind4.1 mph E
Humidity23%
Visibility—
Dew point31°
Mon, 2666° / 57°0
66 °
Des Plaines, Monday, 26 October
Overcast. High 66°, low 57°.
Pressure29.97 inHg
Wind7.2 mph E
Humidity33%
Visibility—
Dew point35°
Tue, 2764° / 53°0.01
64 °
Des Plaines, Tuesday, 27 October
Light rain. High 64°, low 53°.
Pressure29.83 inHg
Wind13.1 mph SW
Humidity64%
Visibility—
Dew point43°
Wed, 2866° / 50°0
66 °
Des Plaines, Wednesday, 28 October
Clear. High 66°, low 50°.
Pressure30.00 inHg
Wind9.9 mph SW
Humidity37%
Visibility—
Dew point35°
Thu, 2963° / 55°0
63 °
Des Plaines, Thursday, 29 October
Partly cloudy. High 63°, low 55°.
Pressure29.85 inHg
Wind6.8 mph S
Humidity64%
Visibility—
Dew point50°
Fri, 3063° / 50°1.23
63 °
Des Plaines, Friday, 30 October
Heavy rain. High 63°, low 50°.
Pressure29.47 inHg
Wind17.7 mph W
Humidity83%
Visibility—
Dew point57°
Sat, 3147° / 43°0.01
47 °
Des Plaines, Saturday, 31 October
Light rain. High 47°, low 43°.
Pressure29.83 inHg
Wind14.1 mph W
Humidity58%
Visibility—
Dew point30°
From day 17 onward the outlook is built from 60-year climate statistics
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)
Mon, 0951° / 39°0.12
51 °
Des Plaines, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low39°
Average precipitation0.12 in
Chance of precipitation38%
Record high72° (2020)
Record low21° (1991)
Tue, 1050° / 39°0.11
50 °
Des Plaines, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high50°
Average low39°
Average precipitation0.11 in
Chance of precipitation33%
Record high73° (2020)
Record low18° (2017)
Wed, 1148° / 36°0.08
48 °
Des Plaines, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high48°
Average low36°
Average precipitation0.08 in
Chance of precipitation32%
Record high69° (1964)
Record low15° (2019)
Thu, 1246° / 35°0.06
46 °
Des Plaines, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.06 in
Chance of precipitation23%
Record high66° (1964)
Record low3° (2019)
Fri, 1346° / 35°0.05
46 °
Des Plaines, Friday, 13 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.05 in
Chance of precipitation18%
Record high68° (1999)
Record low1° (2019)
Sat, 1447° / 35°0.07
47 °
Des Plaines, Saturday, 14 November
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.07 in
Chance of precipitation33%
Record high68° (1971)
Record low15° (1986)
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.