Monthly outlook for Millburn, IL: average high 63.7°, average low 49.4°. That is 2.2° above the climate normal for October. Precipitation is expected on 2 days (about 1.5 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 12 October (80°), the coolest 19 October (37.8°).
63.7°/49.4°
Average high / low
+2.2°
Above normal
2 / 5
Wet days / normal
1.5 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
68.3°
60.9°
+4.1°
18 October – 27 October
55.9°
56.7°
-0.4°
28 October – 6 November
at normal
52.7°
—
October records over 66 years
86.9°3 October 2025All-time high
26.1°30 October 1988All-time low
Climate normals and records are computed from the nearest reference point — Round Lake Beach (5 mi).
Fri, 0972° / 52°0.02
72 °
Millburn, Friday, 9 October
Light rain. High 72°, low 52°.
Pressure30.15 inHg
Wind7.1 mph SE
Humidity55%
Visibility6.2 mi
Dew point49°
Sat, 1077° / 58°0
77 °
Millburn, Saturday, 10 October
Overcast. High 77°, low 58°.
Pressure30.09 inHg
Wind9.2 mph S
Humidity57%
Visibility6.2 mi
Dew point56°
Sun, 1170° / 58°0
70 °
Millburn, Sunday, 11 October
Overcast. High 70°, low 58°.
Pressure29.94 inHg
Wind3.8 mph E
Humidity66%
Visibility6.2 mi
Dew point57°
Mon, 1280° / 57°0
80 °
Millburn, Monday, 12 October
Mostly clear. High 80°, low 57°.
Pressure29.80 inHg
Wind10.8 mph SW
Humidity62%
Visibility6.2 mi
Dew point61°
Tue, 1367° / 59°0.09
67 °
Millburn, Tuesday, 13 October
Light rain. High 67°, low 59°.
Pressure29.85 inHg
Wind8.2 mph N
Humidity80%
Visibility—
Dew point61°
Wed, 1459° / 54°0
59 °
Millburn, Wednesday, 14 October
Overcast. High 59°, low 54°.
Pressure30.12 inHg
Wind10.8 mph NE
Humidity68%
Visibility—
Dew point48°
Thu, 1575° / 55°1.34
75 °
Millburn, Thursday, 15 October
Heavy rain. High 75°, low 55°.
Pressure29.80 inHg
Wind18.5 mph SW
Humidity87%
Visibility—
Dew point64°
Fri, 1663° / 49°0
63 °
Millburn, Friday, 16 October
Overcast. High 63°, low 49°.
Pressure30.09 inHg
Wind16.1 mph W
Humidity67%
Visibility—
Dew point43°
Sat, 1749° / 38°0
49 °
Millburn, Saturday, 17 October
Clear. High 49°, low 38°.
Pressure30.47 inHg
Wind14.9 mph NW
Humidity47%
Visibility—
Dew point28°
Sun, 1851° / 38°0
51 °
Millburn, Sunday, 18 October
Overcast. High 51°, low 38°.
Pressure30.50 inHg
Wind6.1 mph SW
Humidity55%
Visibility—
Dew point33°
Mon, 1956° / 38°0
56 °
Millburn, Monday, 19 October
Clear. High 56°, low 38°.
Pressure30.50 inHg
Wind8.2 mph E
Humidity51%
Visibility—
Dew point36°
Tue, 2051° / 48°0
51 °
Millburn, Tuesday, 20 October
Overcast. High 51°, low 48°.
Pressure30.33 inHg
Wind7 mph S
Humidity59%
Visibility—
Dew point37°
Wed, 2164° / 46°0
64 °
Millburn, Wednesday, 21 October
Mostly clear. High 64°, low 46°.
Pressure30.12 inHg
Wind12.6 mph SW
Humidity65%
Visibility—
Dew point48°
Thu, 2260° / 48°0
60 °
Millburn, Thursday, 22 October
Mostly clear. High 60°, low 48°.
Pressure30.21 inHg
Wind10.3 mph NE
Humidity64%
Visibility—
Dew point46°
Fri, 2354° / 44°0.01
54 °
Millburn, Friday, 23 October
Light rain. High 54°, low 44°.
Pressure30.33 inHg
Wind9.8 mph NE
Humidity53%
Visibility—
Dew point36°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2456° / 45°0.1
56 °
Millburn, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high56°
Average low45°
Average precipitation0.1 in
Chance of precipitation38%
Record high76° (2023)
Record low27° (1981)
Sun, 2556° / 44°0.1
56 °
Millburn, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high56°
Average low44°
Average precipitation0.1 in
Chance of precipitation33%
Record high72° (2012)
Record low30° (1962)
Mon, 2655° / 44°0.13
55 °
Millburn, Monday, 26 October
Climate normal for this date — 60-year average.
Average high55°
Average low44°
Average precipitation0.13 in
Chance of precipitation28%
Record high76° (1963)
Record low26° (1962)
Tue, 2755° / 43°0.08
55 °
Millburn, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high55°
Average low43°
Average precipitation0.08 in
Chance of precipitation33%
Record high73° (2014)
Record low30° (1980)
Wed, 2854° / 43°0.05
54 °
Millburn, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.05 in
Chance of precipitation22%
Record high68° (1999)
Record low30° (1976)
Thu, 2954° / 42°0.06
54 °
Millburn, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high54°
Average low42°
Average precipitation0.06 in
Chance of precipitation20%
Record high78° (2024)
Record low28° (1988)
Fri, 3056° / 43°0.09
56 °
Millburn, Friday, 30 October
Climate normal for this date — 60-year average.
Average high56°
Average low43°
Average precipitation0.09 in
Chance of precipitation30%
Record high76° (2024)
Record low26° (1988)
Sat, 3154° / 43°0.12
54 °
Millburn, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high54°
Average low43°
Average precipitation0.12 in
Chance of precipitation42%
Record high71° (1974)
Record low28° (2019)
Sun, 0153° / 42°0.16
53 °
Millburn, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high53°
Average low42°
Average precipitation0.16 in
Chance of precipitation45%
Record high71° (2016)
Record low20° (2019)
Mon, 0252° / 41°0.14
52 °
Millburn, Monday, 2 November
Climate normal for this date — 60-year average.
Average high52°
Average low41°
Average precipitation0.14 in
Chance of precipitation37%
Record high72° (1961)
Record low23° (1991)
Tue, 0351° / 40°0.06
51 °
Millburn, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.06 in
Chance of precipitation30%
Record high70° (1987)
Record low17° (1991)
Wed, 0451° / 41°0.1
51 °
Millburn, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high51°
Average low41°
Average precipitation0.1 in
Chance of precipitation32%
Record high69° (2022)
Record low15° (1991)
Thu, 0551° / 40°0.12
51 °
Millburn, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high51°
Average low40°
Average precipitation0.12 in
Chance of precipitation28%
Record high71° (1978)
Record low20° (1991)
Fri, 0651° / 38°0.09
51 °
Millburn, Friday, 6 November
Climate normal for this date — 60-year average.
Average high51°
Average low38°
Average precipitation0.09 in
Chance of precipitation30%
Record high70° (2020)
Record low22° (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 Millburn, 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 Millburn, 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.