Monthly outlook for Niles, IL: average high 63.8°, average low 50.5°. That is 3.4° above the climate normal for October. Precipitation is expected on 4 days (about 2.1 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 23 October (78.8°), the coolest 17 October (37.9°).
63.8°/50.5°
Average high / low
+3.4°
Above normal
4 / 5
Wet days / normal
2.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
15 October – 24 October
65.9°
58.9°
+3.9°
25 October – 3 November
60.4°
55.1°
+3°
4 November – 13 November
at normal
50°
—
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 (2 mi).
Fri, 1659° / 44°0.04
59 °
Niles, Friday, 16 October
Light rain. High 59°, low 44°.
Pressure30.00 inHg
Wind13.2 mph NW
Humidity65%
Visibility6.2 mi
Dew point43°
Sat, 1754° / 38°0
54 °
Niles, Saturday, 17 October
Clear. High 54°, low 38°.
Pressure30.53 inHg
Wind3.7 mph W
Humidity50%
Visibility6.2 mi
Dew point33°
Sun, 1860° / 42°0
60 °
Niles, Sunday, 18 October
Clear. High 60°, low 42°.
Pressure30.45 inHg
Wind10.3 mph SW
Humidity57%
Visibility6.2 mi
Dew point40°
Mon, 1961° / 42°0
61 °
Niles, Monday, 19 October
Overcast. High 61°, low 42°.
Pressure30.39 inHg
Wind6.3 mph SW
Humidity56%
Visibility—
Dew point42°
Tue, 2067° / 42°0
67 °
Niles, Tuesday, 20 October
Clear. High 67°, low 42°.
Pressure30.36 inHg
Wind5 mph E
Humidity46%
Visibility—
Dew point41°
Wed, 2173° / 57°0
73 °
Niles, Wednesday, 21 October
Overcast. High 73°, low 57°.
Pressure30.33 inHg
Wind6.2 mph S
Humidity37%
Visibility—
Dew point42°
Thu, 2275° / 60°0
75 °
Niles, Thursday, 22 October
Overcast. High 75°, low 60°.
Pressure30.21 inHg
Wind8.6 mph S
Humidity34%
Visibility—
Dew point42°
Fri, 2379° / 64°0.02
79 °
Niles, Friday, 23 October
Light rain. High 79°, low 64°.
Pressure30.00 inHg
Wind13.8 mph S
Humidity45%
Visibility—
Dew point52°
Sat, 2470° / 64°0.28
70 °
Niles, Saturday, 24 October
Light rain. High 70°, low 64°.
Pressure30.18 inHg
Wind7.2 mph SW
Humidity72%
Visibility—
Dew point60°
Sun, 2563° / 54°0.04
63 °
Niles, Sunday, 25 October
Light rain. High 63°, low 54°.
Pressure30.15 inHg
Wind10.5 mph N
Humidity63%
Visibility—
Dew point45°
Mon, 2657° / 46°1.08
57 °
Niles, Monday, 26 October
Heavy rain. High 57°, low 46°.
Pressure30.03 inHg
Wind10.8 mph NW
Humidity37%
Visibility—
Dew point28°
Tue, 2761° / 50°0
61 °
Niles, Tuesday, 27 October
Clear. High 61°, low 50°.
Pressure30.15 inHg
Wind3.9 mph SW
Humidity39%
Visibility—
Dew point34°
Wed, 2862° / 51°0
62 °
Niles, Wednesday, 28 October
Overcast. High 62°, low 51°.
Pressure29.91 inHg
Wind3.7 mph W
Humidity36%
Visibility—
Dew point33°
Thu, 2960° / 52°0
60 °
Niles, Thursday, 29 October
Clear. High 60°, low 52°.
Pressure29.94 inHg
Wind11.6 mph NW
Humidity39%
Visibility—
Dew point34°
Fri, 3059° / 46°0
59 °
Niles, Friday, 30 October
Clear. High 59°, low 46°.
Pressure30.12 inHg
Wind8.4 mph S
Humidity24%
Visibility—
Dew point21°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 3156° / 44°0.14
56 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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 °
Niles, 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)
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 Niles, 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 Niles, 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.