Monthly outlook for Barrington, IL: average high 61.2°, average low 47.6°. That is 1.8° above the climate normal for October. Precipitation is expected on 4 days (about 0.6 inches), against a normal of 5 days and 1.5 inches. The warmest day looks like 24 October (71.4°), the coolest 17 October (38.1°).
61.2°/47.6°
Average high / low
+1.8°
Above normal
4 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
14 October – 23 October
62.6°
59.2°
+1.9°
24 October – 2 November
58.9°
55.4°
+1.9°
3 November – 12 November
at normal
50.1°
—
October records over 66 years
86.9°3 October 2025All-time high
23.4°26 October 1962All-time low
Climate normals and records are computed from the nearest reference point — Elgin (13 mi).
Thu, 1563° / 57°0.29
63 °
Barrington, Thursday, 15 October
Rain. High 63°, low 57°.
Pressure30.03 inHg
Wind8.3 mph E
Humidity94%
Visibility3.1 mi
Dew point56°
Fri, 1658° / 45°0.09
58 °
Barrington, Friday, 16 October
Light rain. High 58°, low 45°.
Pressure30.03 inHg
Wind14.2 mph NW
Humidity73%
Visibility6.2 mi
Dew point44°
Sat, 1754° / 38°0
54 °
Barrington, Saturday, 17 October
Clear. High 54°, low 38°.
Pressure30.53 inHg
Wind3.1 mph W
Humidity52%
Visibility6.2 mi
Dew point34°
Sun, 1859° / 42°0
59 °
Barrington, Sunday, 18 October
Clear. High 59°, low 42°.
Pressure30.45 inHg
Wind11 mph SW
Humidity56%
Visibility6.2 mi
Dew point40°
Mon, 1962° / 41°0
62 °
Barrington, Monday, 19 October
Clear. High 62°, low 41°.
Pressure30.42 inHg
Wind7.8 mph SW
Humidity49%
Visibility—
Dew point39°
Tue, 2067° / 44°0
67 °
Barrington, Tuesday, 20 October
Mostly clear. High 67°, low 44°.
Pressure30.33 inHg
Wind5.1 mph E
Humidity48%
Visibility—
Dew point42°
Wed, 2170° / 53°0
70 °
Barrington, Wednesday, 21 October
Clear. High 70°, low 53°.
Pressure30.21 inHg
Wind12.5 mph S
Humidity57%
Visibility—
Dew point51°
Thu, 2263° / 62°0.19
63 °
Barrington, Thursday, 22 October
Light rain. High 63°, low 62°.
Pressure29.94 inHg
Wind14.2 mph S
Humidity87%
Visibility—
Dew point59°
Fri, 2365° / 58°0.01
65 °
Barrington, Friday, 23 October
Light rain. High 65°, low 58°.
Pressure30.09 inHg
Wind9.6 mph N
Humidity74%
Visibility—
Dew point56°
Sat, 2471° / 50°0.06
71 °
Barrington, Saturday, 24 October
Light rain. High 71°, low 50°.
Pressure29.85 inHg
Wind17.8 mph SW
Humidity64%
Visibility—
Dew point58°
Sun, 2555° / 42°0
55 °
Barrington, Sunday, 25 October
Clear. High 55°, low 42°.
Pressure30.33 inHg
Wind11.1 mph W
Humidity42%
Visibility—
Dew point31°
Mon, 2652° / 39°0
52 °
Barrington, Monday, 26 October
Clear. High 52°, low 39°.
Pressure30.39 inHg
Wind7.8 mph W
Humidity40%
Visibility—
Dew point26°
Tue, 2755° / 40°0
55 °
Barrington, Tuesday, 27 October
Overcast. High 55°, low 40°.
Pressure30.24 inHg
Wind13.9 mph SW
Humidity44%
Visibility—
Dew point31°
Wed, 2859° / 45°0
59 °
Barrington, Wednesday, 28 October
Overcast. High 59°, low 45°.
Pressure30.06 inHg
Wind11.7 mph SW
Humidity39%
Visibility—
Dew point32°
Thu, 2960° / 48°0
60 °
Barrington, Thursday, 29 October
Overcast. High 60°, low 48°.
Pressure30.00 inHg
Wind11.4 mph SW
Humidity64%
Visibility—
Dew point45°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 3057° / 42°0.11
57 °
Barrington, Friday, 30 October
Climate normal for this date — 60-year average.
Average high57°
Average low42°
Average precipitation0.11 in
Chance of precipitation28%
Record high76° (1971)
Record low24° (1988)
Sat, 3155° / 42°0.12
55 °
Barrington, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high55°
Average low42°
Average precipitation0.12 in
Chance of precipitation37%
Record high73° (1974)
Record low26° (2019)
Sun, 0154° / 41°0.17
54 °
Barrington, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high54°
Average low41°
Average precipitation0.17 in
Chance of precipitation38%
Record high73° (2016)
Record low18° (2019)
Mon, 0253° / 40°0.11
53 °
Barrington, Monday, 2 November
Climate normal for this date — 60-year average.
Average high53°
Average low40°
Average precipitation0.11 in
Chance of precipitation35%
Record high74° (1961)
Record low22° (1991)
Tue, 0352° / 39°0.06
52 °
Barrington, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.06 in
Chance of precipitation30%
Record high72° (1987)
Record low16° (1991)
Wed, 0452° / 40°0.09
52 °
Barrington, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high52°
Average low40°
Average precipitation0.09 in
Chance of precipitation23%
Record high71° (2015)
Record low15° (1991)
Thu, 0552° / 39°0.12
52 °
Barrington, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high52°
Average low39°
Average precipitation0.12 in
Chance of precipitation28%
Record high74° (1978)
Record low18° (1991)
Fri, 0652° / 37°0.08
52 °
Barrington, Friday, 6 November
Climate normal for this date — 60-year average.
Average high52°
Average low37°
Average precipitation0.08 in
Chance of precipitation28%
Record high71° (1975)
Record low22° (1991)
Sat, 0751° / 37°0.04
51 °
Barrington, Saturday, 7 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.04 in
Chance of precipitation18%
Record high68° (2009)
Record low14° (1991)
Sun, 0850° / 37°0.05
50 °
Barrington, Sunday, 8 November
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.05 in
Chance of precipitation18%
Record high72° (2020)
Record low13° (1991)
Mon, 0951° / 37°0.12
51 °
Barrington, Monday, 9 November
Climate normal for this date — 60-year average.
Average high51°
Average low37°
Average precipitation0.12 in
Chance of precipitation32%
Record high72° (1999)
Record low17° (1991)
Tue, 1049° / 36°0.1
49 °
Barrington, Tuesday, 10 November
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.1 in
Chance of precipitation37%
Record high71° (2020)
Record low17° (2017)
Wed, 1147° / 34°0.06
47 °
Barrington, Wednesday, 11 November
Climate normal for this date — 60-year average.
Average high47°
Average low34°
Average precipitation0.06 in
Chance of precipitation27%
Record high70° (1964)
Record low15° (2019)
Thu, 1246° / 33°0.06
46 °
Barrington, Thursday, 12 November
Climate normal for this date — 60-year average.
Average high46°
Average low33°
Average precipitation0.06 in
Chance of precipitation23%
Record high65° (1964)
Record low2° (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 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 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.