Monthly outlook for North Barrington, IL: average high 79°, average low 62.1°. That is 0.4° below the climate normal for August. Precipitation is expected on 8 days (about 3.2 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (90.1°), the coolest 23 August (55.2°).
79°/62.1°
Average high / low
−0.4°
Below normal
8 / 6
Wet days / normal
3.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.8°
79.8°
-0°
19 August – 28 August
77.6°
79.9°
-1.2°
29 August – 7 September
at normal
78.1°
—
August records over 66 years
98.1°24 August 2023All-time high
46.4°29 August 1986All-time low
Climate normals and records are computed from the nearest reference point — Elgin (15 mi).
Mon, 1090° / 72°0.62
90 °
North Barrington, Monday, 10 August
Rain. High 90°, low 72°.
Pressure29.88 inHg
Wind3.5 mph E
Humidity66%
Visibility6.2 mi
Dew point72°
Tue, 1184° / 65°1.19
84 °
North Barrington, Tuesday, 11 August
Heavy rain. High 84°, low 65°.
Pressure29.80 inHg
Wind8.4 mph S
Humidity64%
Visibility6.2 mi
Dew point71°
Wed, 1284° / 63°0
84 °
North Barrington, Wednesday, 12 August
Clear. High 84°, low 63°.
Pressure29.85 inHg
Wind4.2 mph NW
Humidity61%
Visibility6.2 mi
Dew point66°
Thu, 1374° / 62°0.07
74 °
North Barrington, Thursday, 13 August
Light rain. High 74°, low 62°.
Pressure29.97 inHg
Wind7.2 mph E
Humidity69%
Visibility—
Dew point61°
Fri, 1473° / 59°0
73 °
North Barrington, Friday, 14 August
Overcast. High 73°, low 59°.
Pressure30.15 inHg
Wind13.3 mph E
Humidity51%
Visibility—
Dew point52°
Sat, 1577° / 62°0.07
77 °
North Barrington, Saturday, 15 August
Light rain. High 77°, low 62°.
Pressure30.21 inHg
Wind12.6 mph SE
Humidity47%
Visibility—
Dew point52°
Sun, 1675° / 64°0.21
75 °
North Barrington, Sunday, 16 August
Rain. High 75°, low 64°.
Pressure30.00 inHg
Wind11.5 mph NW
Humidity82%
Visibility—
Dew point66°
Mon, 1777° / 63°0
77 °
North Barrington, Monday, 17 August
Overcast. High 77°, low 63°.
Pressure30.09 inHg
Wind7.5 mph N
Humidity57%
Visibility—
Dew point56°
Tue, 1878° / 60°0
78 °
North Barrington, Tuesday, 18 August
Overcast. High 78°, low 60°.
Pressure29.91 inHg
Wind9.4 mph SW
Humidity77%
Visibility—
Dew point59°
Wed, 1975° / 63°0.01
75 °
North Barrington, Wednesday, 19 August
Light rain. High 75°, low 63°.
Pressure29.83 inHg
Wind12.8 mph NW
Humidity68%
Visibility—
Dew point62°
Thu, 2076° / 59°0.08
76 °
North Barrington, Thursday, 20 August
Light rain. High 76°, low 59°.
Pressure29.94 inHg
Wind6 mph SE
Humidity71%
Visibility—
Dew point61°
Fri, 2178° / 61°0.12
78 °
North Barrington, Friday, 21 August
Light rain. High 78°, low 61°.
Pressure29.77 inHg
Wind14.4 mph S
Humidity62%
Visibility—
Dew point59°
Sat, 2280° / 64°0.02
80 °
North Barrington, Saturday, 22 August
Light rain. High 80°, low 64°.
Pressure29.80 inHg
Wind14.1 mph NW
Humidity48%
Visibility—
Dew point57°
Sun, 2377° / 55°0
77 °
North Barrington, Sunday, 23 August
Clear. High 77°, low 55°.
Pressure30.15 inHg
Wind8.2 mph W
Humidity46%
Visibility—
Dew point50°
Mon, 2479° / 60°0
79 °
North Barrington, Monday, 24 August
Clear. High 79°, low 60°.
Pressure30.21 inHg
Wind8.9 mph W
Humidity58%
Visibility—
Dew point59°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 64°0.08
80 °
North Barrington, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.08 in
Chance of precipitation25%
Record high92° (2003)
Record low53° (2025)
Wed, 2680° / 65°0.16
80 °
North Barrington, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.16 in
Chance of precipitation33%
Record high95° (2024)
Record low51° (2025)
Thu, 2780° / 65°0.11
80 °
North Barrington, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation28%
Record high96° (2024)
Record low53° (2025)
Fri, 2880° / 65°0.13
80 °
North Barrington, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.13 in
Chance of precipitation38%
Record high93° (1984)
Record low47° (1986)
Sat, 2980° / 64°0.13
80 °
North Barrington, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low64°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (1984)
Record low46° (1986)
Sun, 3079° / 63°0.11
79 °
North Barrington, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.11 in
Chance of precipitation28%
Record high94° (2013)
Record low52° (1986)
Mon, 3179° / 63°0.09
79 °
North Barrington, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low63°
Average precipitation0.09 in
Chance of precipitation20%
Record high90° (2012)
Record low51° (2009)
Tue, 0178° / 63°0.12
78 °
North Barrington, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.12 in
Chance of precipitation32%
Record high93° (2011)
Record low49° (2009)
Wed, 0278° / 63°0.04
78 °
North Barrington, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.04 in
Chance of precipitation23%
Record high92° (2008)
Record low49° (1967)
Thu, 0378° / 63°0.09
78 °
North Barrington, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation27%
Record high93° (2023)
Record low47° (1974)
Fri, 0477° / 62°0.1
77 °
North Barrington, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low62°
Average precipitation0.1 in
Chance of precipitation32%
Record high92° (2023)
Record low47° (1974)
Sat, 0577° / 61°0.07
77 °
North Barrington, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.07 in
Chance of precipitation20%
Record high89° (2023)
Record low50° (1962)
Sun, 0677° / 61°0.12
77 °
North Barrington, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.12 in
Chance of precipitation35%
Record high91° (1990)
Record low48° (2025)
Mon, 0777° / 61°0.09
77 °
North Barrington, Monday, 7 September
Climate normal for this date — 60-year average.
Average high77°
Average low61°
Average precipitation0.09 in
Chance of precipitation28%
Record high91° (1960)
Record low46° (2025)
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 North 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 North 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.