Monthly outlook for Lake Barrington, IL: average high 54.5°, average low 45.5°. That is 2.8° above the climate normal for October. Precipitation is expected on 5 days (about 1.3 inches), against a normal of 5 days and 1.4 inches. The warmest day looks like 3 November (71°), the coolest 15 November (31.9°).
54.5°/45.5°
Average high / low
+2.8°
Above normal
5 / 5
Wet days / normal
1.3 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
31 October – 9 November
59.3°
51.4°
+4.4°
10 November – 19 November
46.4°
46°
+0.3°
20 November – 29 November
at normal
41.9°
—
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 (12 mi).
Sun, 0168° / 54°0
68 °
Lake Barrington, Sunday, 1 November
Partly cloudy. High 68°, low 54°.
Pressure30.33 inHg
Wind4 mph SE
Humidity64%
Visibility6.2 mi
Dew point53°
Mon, 0259° / 54°0.13
59 °
Lake Barrington, Monday, 2 November
Light rain. High 59°, low 54°.
Pressure30.09 inHg
Wind11 mph S
Humidity78%
Visibility6.2 mi
Dew point51°
Tue, 0371° / 60°0.42
71 °
Lake Barrington, Tuesday, 3 November
Rain. High 71°, low 60°.
Pressure29.88 inHg
Wind9.4 mph S
Humidity84%
Visibility6.2 mi
Dew point61°
Wed, 0464° / 57°0.27
64 °
Lake Barrington, Wednesday, 4 November
Light rain. High 64°, low 57°.
Pressure29.65 inHg
Wind10.8 mph S
Humidity98%
Visibility2.2 mi
Dew point63°
Thu, 0558° / 54°0.02
58 °
Lake Barrington, Thursday, 5 November
Light rain. High 58°, low 54°.
Pressure29.62 inHg
Wind13.9 mph SW
Humidity69%
Visibility—
Dew point47°
Fri, 0652° / 49°0.02
52 °
Lake Barrington, Friday, 6 November
Light rain. High 52°, low 49°.
Pressure29.85 inHg
Wind9.4 mph N
Humidity86%
Visibility—
Dew point48°
Sat, 0755° / 47°0
55 °
Lake Barrington, Saturday, 7 November
Overcast. High 55°, low 47°.
Pressure29.77 inHg
Wind7 mph N
Humidity64%
Visibility—
Dew point41°
Sun, 0855° / 44°0
55 °
Lake Barrington, Sunday, 8 November
Overcast. High 55°, low 44°.
Pressure29.77 inHg
Wind11.2 mph NW
Humidity52%
Visibility—
Dew point35°
Mon, 0951° / 44°0
51 °
Lake Barrington, Monday, 9 November
Light rain. High 51°, low 44°.
Pressure29.88 inHg
Wind13.5 mph NW
Humidity56%
Visibility—
Dew point35°
Tue, 1056° / 39°0
56 °
Lake Barrington, Tuesday, 10 November
Clear. High 56°, low 39°.
Pressure29.94 inHg
Wind12.4 mph W
Humidity38%
Visibility—
Dew point28°
Wed, 1148° / 35°0
48 °
Lake Barrington, Wednesday, 11 November
Clear. High 48°, low 35°.
Pressure29.80 inHg
Wind13.4 mph NW
Humidity45%
Visibility—
Dew point26°
Thu, 1247° / 34°0
47 °
Lake Barrington, Thursday, 12 November
Mostly clear. High 47°, low 34°.
Pressure29.80 inHg
Wind8.2 mph NW
Humidity54%
Visibility—
Dew point29°
Fri, 1341° / 37°0.37
41 °
Lake Barrington, Friday, 13 November
Rain. High 41°, low 37°.
Pressure29.83 inHg
Wind7.6 mph NE
Humidity95%
Visibility—
Dew point38°
Sat, 1443° / 38°0.04
43 °
Lake Barrington, Saturday, 14 November
Light rain. High 43°, low 38°.
Pressure29.88 inHg
Wind12.3 mph N
Humidity75%
Visibility—
Dew point35°
Sun, 1544° / 32°0
44 °
Lake Barrington, Sunday, 15 November
Clear. High 44°, low 32°.
Pressure29.97 inHg
Wind9.4 mph N
Humidity54%
Visibility—
Dew point26°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 1646° / 34°0.05
46 °
Lake Barrington, Monday, 16 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.05 in
Chance of precipitation17%
Record high62° (1988)
Record low21° (1997)
Tue, 1746° / 35°0.1
46 °
Lake Barrington, Tuesday, 17 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation28%
Record high68° (2016)
Record low15° (2014)
Wed, 1846° / 35°0.1
46 °
Lake Barrington, Wednesday, 18 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.1 in
Chance of precipitation28%
Record high64° (1975)
Record low12° (2014)
Thu, 1946° / 35°0.07
46 °
Lake Barrington, Thursday, 19 November
Climate normal for this date — 60-year average.
Average high46°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high63° (1983)
Record low15° (2018)
Fri, 2044° / 33°0.07
44 °
Lake Barrington, Friday, 20 November
Climate normal for this date — 60-year average.
Average high44°
Average low33°
Average precipitation0.07 in
Chance of precipitation35%
Record high61° (2003)
Record low13° (2022)
Sat, 2143° / 32°0.1
43 °
Lake Barrington, Saturday, 21 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.1 in
Chance of precipitation25%
Record high64° (1990)
Record low11° (1964)
Sun, 2243° / 31°0.04
43 °
Lake Barrington, Sunday, 22 November
Climate normal for this date — 60-year average.
Average high43°
Average low31°
Average precipitation0.04 in
Chance of precipitation18%
Record high62° (2010)
Record low14° (2015)
Mon, 2343° / 32°0.07
43 °
Lake Barrington, Monday, 23 November
Climate normal for this date — 60-year average.
Average high43°
Average low32°
Average precipitation0.07 in
Chance of precipitation30%
Record high63° (2003)
Record low12° (1970)
Tue, 2442° / 30°0.08
42 °
Lake Barrington, Tuesday, 24 November
Climate normal for this date — 60-year average.
Average high42°
Average low30°
Average precipitation0.08 in
Chance of precipitation28%
Record high60° (1966)
Record low14° (2013)
Wed, 2542° / 32°0.09
42 °
Lake Barrington, Wednesday, 25 November
Climate normal for this date — 60-year average.
Average high42°
Average low32°
Average precipitation0.09 in
Chance of precipitation33%
Record high59° (1966)
Record low16° (2005)
Thu, 2642° / 31°0.12
42 °
Lake Barrington, Thursday, 26 November
Climate normal for this date — 60-year average.
Average high42°
Average low31°
Average precipitation0.12 in
Chance of precipitation45%
Record high61° (1990)
Record low6° (1977)
Fri, 2741° / 31°0.21
41 °
Lake Barrington, Friday, 27 November
Climate normal for this date — 60-year average.
Average high41°
Average low31°
Average precipitation0.21 in
Chance of precipitation50%
Record high63° (1990)
Record low15° (1977)
Sat, 2839° / 28°0.12
39 °
Lake Barrington, Saturday, 28 November
Climate normal for this date — 60-year average.
Average high39°
Average low28°
Average precipitation0.12 in
Chance of precipitation35%
Record high62° (1990)
Record low4° (2018)
Sun, 2940° / 28°0.08
40 °
Lake Barrington, Sunday, 29 November
Climate normal for this date — 60-year average.
Average high40°
Average low28°
Average precipitation0.08 in
Chance of precipitation37%
Record high63° (1998)
Record low7° (1976)
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 Lake Barrington, 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 Lake Barrington, 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.