Monthly outlook for Lake in the Hills, IL: average high 79.5°, average low 64.5°. That is 0.1° below the climate normal for August. Precipitation is expected on 9 days (about 2.7 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 10 August (87.5°), the coolest 22 August (57.5°).
79.5°/64.5°
Average high / low
−0.1°
Below normal
9 / 6
Wet days / normal
2.7 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
79.7°
79.8°
-0.1°
19 August – 28 August
79.2°
79.9°
-0.4°
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 (11 mi).
Mon, 1087° / 71°0.28
87 °
Lake in the Hills, Monday, 10 August
Rain. High 87°, low 71°.
Pressure29.88 inHg
Wind4.4 mph SE
Humidity76%
Visibility6.2 mi
Dew point72°
Tue, 1180° / 68°0.39
80 °
Lake in the Hills, Tuesday, 11 August
Heavy rain. High 80°, low 68°.
Pressure29.80 inHg
Wind11.3 mph NE
Humidity96%
Visibility6.2 mi
Dew point68°
Wed, 1281° / 63°0
81 °
Lake in the Hills, Wednesday, 12 August
Overcast. High 81°, low 63°.
Pressure29.91 inHg
Wind3.3 mph N
Humidity70%
Visibility6.2 mi
Dew point68°
Thu, 1378° / 63°0.03
78 °
Lake in the Hills, Thursday, 13 August
Light rain. High 78°, low 63°.
Pressure29.97 inHg
Wind8.3 mph S
Humidity52%
Visibility6.2 mi
Dew point60°
Fri, 1475° / 66°0.16
75 °
Lake in the Hills, Friday, 14 August
Light rain. High 75°, low 66°.
Pressure30.06 inHg
Wind13.6 mph E
Humidity91%
Visibility—
Dew point68°
Sat, 1587° / 68°0.45
87 °
Lake in the Hills, Saturday, 15 August
Rain. High 87°, low 68°.
Pressure29.91 inHg
Wind12.2 mph E
Humidity78%
Visibility—
Dew point72°
Sun, 1674° / 66°0
74 °
Lake in the Hills, Sunday, 16 August
Overcast. High 74°, low 66°.
Pressure29.97 inHg
Wind14.9 mph NW
Humidity77%
Visibility—
Dew point64°
Mon, 1772° / 60°0.17
72 °
Lake in the Hills, Monday, 17 August
Light rain. High 72°, low 60°.
Pressure29.97 inHg
Wind12.2 mph E
Humidity86%
Visibility—
Dew point62°
Tue, 1883° / 69°0.02
83 °
Lake in the Hills, Tuesday, 18 August
Light rain. High 83°, low 69°.
Pressure29.85 inHg
Wind13.9 mph W
Humidity68%
Visibility—
Dew point69°
Wed, 1981° / 65°0
81 °
Lake in the Hills, Wednesday, 19 August
Overcast. High 81°, low 65°.
Pressure30.03 inHg
Wind7.4 mph NW
Humidity66%
Visibility—
Dew point66°
Thu, 2083° / 68°0.22
83 °
Lake in the Hills, Thursday, 20 August
Rain. High 83°, low 68°.
Pressure29.85 inHg
Wind8.7 mph SW
Humidity78%
Visibility—
Dew point71°
Fri, 2173° / 59°0.16
73 °
Lake in the Hills, Friday, 21 August
Rain. High 73°, low 59°.
Pressure29.94 inHg
Wind13.3 mph N
Humidity80%
Visibility—
Dew point65°
Sat, 2277° / 57°0
77 °
Lake in the Hills, Saturday, 22 August
Clear. High 77°, low 57°.
Pressure30.03 inHg
Wind7.8 mph NE
Humidity54%
Visibility—
Dew point55°
Sun, 2378° / 59°0
78 °
Lake in the Hills, Sunday, 23 August
Overcast. High 78°, low 59°.
Pressure29.97 inHg
Wind8.3 mph SW
Humidity70%
Visibility—
Dew point64°
Mon, 2483° / 67°0.06
83 °
Lake in the Hills, Monday, 24 August
Light rain. High 83°, low 67°.
Pressure30.03 inHg
Wind6.7 mph NW
Humidity72%
Visibility—
Dew point69°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2580° / 64°0.08
80 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 °
Lake in the Hills, 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 Lake in the Hills, 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 in the Hills, 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.