Monthly outlook for Millburn, IL: average high 68.6°, average low 53.3°. That is 5° above the climate normal for October. Precipitation is expected on 5 days (about 0.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 15 October (84.6°), the coolest 14 October (46.6°).
68.6°/53.3°
Average high / low
+5°
Above normal
5 / 5
Wet days / normal
0.9 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
70.5°
60.9°
+5.4°
18 October – 27 October
65.5°
56.7°
+4.9°
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, 0973° / 52°0.04
73 °
Millburn, Friday, 9 October
Light rain. High 73°, low 52°.
Pressure30.15 inHg
Wind5.2 mph SE
Humidity48%
Visibility6.2 mi
Dew point47°
Sat, 1077° / 60°0
77 °
Millburn, Saturday, 10 October
Mostly clear. High 77°, low 60°.
Pressure30.09 inHg
Wind9.3 mph S
Humidity53%
Visibility6.2 mi
Dew point57°
Sun, 1170° / 58°0
70 °
Millburn, Sunday, 11 October
Clear. High 70°, low 58°.
Pressure30.03 inHg
Wind5.6 mph SE
Humidity65%
Visibility6.2 mi
Dew point57°
Mon, 1278° / 56°0
78 °
Millburn, Monday, 12 October
Overcast. High 78°, low 56°.
Pressure29.83 inHg
Wind11.4 mph SW
Humidity60%
Visibility—
Dew point58°
Tue, 1371° / 53°0
71 °
Millburn, Tuesday, 13 October
Overcast. High 71°, low 53°.
Pressure29.91 inHg
Wind12.8 mph NW
Humidity66%
Visibility—
Dew point53°
Wed, 1456° / 47°0
56 °
Millburn, Wednesday, 14 October
Overcast. High 56°, low 47°.
Pressure30.12 inHg
Wind11.2 mph SE
Humidity58%
Visibility—
Dew point40°
Thu, 1585° / 58°0.56
85 °
Millburn, Thursday, 15 October
Heavy rain. High 85°, low 58°.
Pressure29.77 inHg
Wind19 mph SW
Humidity57%
Visibility—
Dew point61°
Fri, 1671° / 52°0.06
71 °
Millburn, Friday, 16 October
Light rain. High 71°, low 52°.
Pressure30.03 inHg
Wind18.8 mph W
Humidity49%
Visibility—
Dew point45°
Sat, 1753° / 48°0
53 °
Millburn, Saturday, 17 October
Overcast. High 53°, low 48°.
Pressure30.45 inHg
Wind10.8 mph NE
Humidity63%
Visibility—
Dew point40°
Sun, 1862° / 49°0.02
62 °
Millburn, Sunday, 18 October
Light rain. High 62°, low 49°.
Pressure30.24 inHg
Wind7.3 mph W
Humidity56%
Visibility—
Dew point44°
Mon, 1956° / 52°0.15
56 °
Millburn, Monday, 19 October
Light rain. High 56°, low 52°.
Pressure30.21 inHg
Wind5.1 mph SE
Humidity90%
Visibility—
Dew point53°
Tue, 2061° / 56°0.04
61 °
Millburn, Tuesday, 20 October
Light rain. High 61°, low 56°.
Pressure30.09 inHg
Wind5.7 mph NE
Humidity79%
Visibility—
Dew point54°
Wed, 2166° / 51°0
66 °
Millburn, Wednesday, 21 October
Partly cloudy. High 66°, low 51°.
Pressure29.97 inHg
Wind7.3 mph SE
Humidity56%
Visibility—
Dew point47°
Thu, 2270° / 52°0.04
70 °
Millburn, Thursday, 22 October
Light rain. High 70°, low 52°.
Pressure29.71 inHg
Wind14.9 mph S
Humidity52%
Visibility—
Dew point48°
Fri, 2377° / 59°0.01
77 °
Millburn, Friday, 23 October
Light rain. High 77°, low 59°.
Pressure29.80 inHg
Wind13.8 mph SW
Humidity63%
Visibility—
Dew point60°
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.