Monthly outlook for Palos Hills, IL: average high 80.4°, average low 65.6°. That is 0° above the climate normal for August. Precipitation is expected on 3 days (about 1.2 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 10 August (90.2°), the coolest 21 August (57.7°).
80.4°/65.6°
Average high / low
+0°
Above normal
3 / 6
Wet days / normal
1.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
81.9°
80.4°
+0.8°
19 August – 28 August
77.8°
80.4°
-1.4°
29 August – 7 September
at normal
78.7°
—
August records over 66 years
98.2°24 August 2023All-time high
48°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Chicago Ridge (2 mi).
Mon, 1090° / 72°0.75
90 °
Palos Hills, Monday, 10 August
Rain. High 90°, low 72°.
Pressure29.88 inHg
Wind4.7 mph NW
Humidity62%
Visibility6.2 mi
Dew point73°
Tue, 1185° / 73°0.04
85 °
Palos Hills, Tuesday, 11 August
Light rain. High 85°, low 73°.
Pressure29.83 inHg
Wind8.7 mph SW
Humidity91%
Visibility6.2 mi
Dew point72°
Wed, 1284° / 70°0
84 °
Palos Hills, Wednesday, 12 August
Light rain. High 84°, low 70°.
Pressure29.85 inHg
Wind3.6 mph N
Humidity49%
Visibility6.2 mi
Dew point64°
Thu, 1376° / 66°0
76 °
Palos Hills, Thursday, 13 August
Overcast. High 76°, low 66°.
Pressure30.00 inHg
Wind8.2 mph NE
Humidity44%
Visibility—
Dew point52°
Fri, 1481° / 63°0
81 °
Palos Hills, Friday, 14 August
Clear. High 81°, low 63°.
Pressure30.09 inHg
Wind9.2 mph NE
Humidity35%
Visibility—
Dew point49°
Sat, 1571° / 65°0.01
71 °
Palos Hills, Saturday, 15 August
Light rain. High 71°, low 65°.
Pressure30.30 inHg
Wind8.2 mph SW
Humidity56%
Visibility—
Dew point52°
Sun, 1678° / 65°0
78 °
Palos Hills, Sunday, 16 August
Overcast. High 78°, low 65°.
Pressure30.12 inHg
Wind5.8 mph S
Humidity50%
Visibility—
Dew point55°
Mon, 1784° / 67°0
84 °
Palos Hills, Monday, 17 August
Overcast. High 84°, low 67°.
Pressure30.03 inHg
Wind7.6 mph SW
Humidity52%
Visibility—
Dew point60°
Tue, 1884° / 68°0
84 °
Palos Hills, Tuesday, 18 August
Overcast. High 84°, low 68°.
Pressure29.97 inHg
Wind9.7 mph SW
Humidity56%
Visibility—
Dew point64°
Wed, 1976° / 67°0.04
76 °
Palos Hills, Wednesday, 19 August
Light rain. High 76°, low 67°.
Pressure29.91 inHg
Wind11.8 mph NW
Humidity55%
Visibility—
Dew point56°
Thu, 2069° / 61°0
69 °
Palos Hills, Thursday, 20 August
Overcast. High 69°, low 61°.
Pressure30.06 inHg
Wind8.5 mph N
Humidity57%
Visibility—
Dew point50°
Fri, 2179° / 58°0
79 °
Palos Hills, Friday, 21 August
Clear. High 79°, low 58°.
Pressure30.06 inHg
Wind8.7 mph NE
Humidity38%
Visibility—
Dew point49°
Sat, 2272° / 59°0
72 °
Palos Hills, Saturday, 22 August
Overcast. High 72°, low 59°.
Pressure29.91 inHg
Wind8.8 mph S
Humidity66%
Visibility—
Dew point56°
Sun, 2385° / 65°0
85 °
Palos Hills, Sunday, 23 August
Clear. High 85°, low 65°.
Pressure29.91 inHg
Wind12.1 mph W
Humidity37%
Visibility—
Dew point53°
Mon, 2486° / 66°0
86 °
Palos Hills, Monday, 24 August
Overcast. High 86°, low 66°.
Pressure30.00 inHg
Wind7.6 mph SW
Humidity38%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 65°0.07
81 °
Palos Hills, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation28%
Record high92° (2003)
Record low50° (2017)
Wed, 2681° / 66°0.17
81 °
Palos Hills, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.17 in
Chance of precipitation35%
Record high95° (2024)
Record low53° (2025)
Thu, 2781° / 67°0.14
81 °
Palos Hills, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.14 in
Chance of precipitation33%
Record high96° (2024)
Record low54° (2025)
Fri, 2880° / 66°0.13
80 °
Palos Hills, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.13 in
Chance of precipitation37%
Record high93° (1984)
Record low50° (1986)
Sat, 2980° / 65°0.11
80 °
Palos Hills, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (1984)
Record low48° (1965)
Sun, 3079° / 65°0.1
79 °
Palos Hills, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.1 in
Chance of precipitation30%
Record high93° (2013)
Record low53° (1986)
Mon, 3179° / 64°0.06
79 °
Palos Hills, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.06 in
Chance of precipitation23%
Record high89° (2012)
Record low54° (2023)
Tue, 0179° / 64°0.13
79 °
Palos Hills, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.13 in
Chance of precipitation30%
Record high95° (2011)
Record low53° (1967)
Wed, 0279° / 64°0.06
79 °
Palos Hills, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.06 in
Chance of precipitation27%
Record high92° (2008)
Record low50° (1965)
Thu, 0379° / 64°0.07
79 °
Palos Hills, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.07 in
Chance of precipitation27%
Record high93° (2023)
Record low51° (1974)
Fri, 0478° / 63°0.09
78 °
Palos Hills, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation33%
Record high91° (2023)
Record low50° (2025)
Sat, 0578° / 63°0.07
78 °
Palos Hills, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.07 in
Chance of precipitation27%
Record high90° (2023)
Record low52° (1974)
Sun, 0678° / 63°0.1
78 °
Palos Hills, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.1 in
Chance of precipitation38%
Record high92° (1990)
Record low49° (2025)
Mon, 0778° / 62°0.13
78 °
Palos Hills, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.13 in
Chance of precipitation30%
Record high92° (1960)
Record low48° (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 Palos 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 Palos 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.