Monthly outlook for Park Ridge, IL: average high 80.3°, average low 66.6°. That is 0.3° above the climate normal for August. Precipitation is expected on 5 days (about 2.2 inches), against a normal of 6 days and 1.8 inches. The warmest day looks like 12 August (87°), the coolest 23 August (58.5°).
80.3°/66.6°
Average high / low
+0.3°
Above normal
5 / 6
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
82°
79.9°
+1.1°
18 August – 27 August
77.6°
79.7°
-1.2°
28 August – 6 September
at normal
78.2°
—
August records over 66 years
99.1°24 August 2023All-time high
49.5°29 August 1965All-time low
Sun, 0984° / 66°1.24
84 °
Park Ridge, Sunday, 9 August
Heavy rain. High 84°, low 66°.
Pressure29.91 inHg
Wind5.5 mph E
Humidity94%
Visibility6.2 mi
Dew point64°
Mon, 1086° / 73°0.12
86 °
Park Ridge, Monday, 10 August
Rain. High 86°, low 73°.
Pressure29.88 inHg
Wind3.8 mph SE
Humidity77%
Visibility6.2 mi
Dew point69°
Tue, 1185° / 72°0.26
85 °
Park Ridge, Tuesday, 11 August
Rain. High 85°, low 72°.
Pressure29.80 inHg
Wind7.3 mph NW
Humidity60%
Visibility6.2 mi
Dew point70°
Wed, 1287° / 69°0.02
87 °
Park Ridge, Wednesday, 12 August
Light rain. High 87°, low 69°.
Pressure29.85 inHg
Wind1.8 mph NE
Humidity55%
Visibility6.2 mi
Dew point63°
Thu, 1374° / 66°0.07
74 °
Park Ridge, Thursday, 13 August
Light rain. High 74°, low 66°.
Pressure29.94 inHg
Wind10.2 mph NE
Humidity60%
Visibility—
Dew point58°
Fri, 1475° / 63°0
75 °
Park Ridge, Friday, 14 August
Clear. High 75°, low 63°.
Pressure30.18 inHg
Wind9.7 mph NE
Humidity42%
Visibility—
Dew point49°
Sat, 1580° / 61°0
80 °
Park Ridge, Saturday, 15 August
Overcast. High 80°, low 61°.
Pressure30.30 inHg
Wind4.4 mph S
Humidity33%
Visibility—
Dew point45°
Sun, 1682° / 63°0
82 °
Park Ridge, Sunday, 16 August
Partly cloudy. High 82°, low 63°.
Pressure30.18 inHg
Wind9.4 mph SW
Humidity37%
Visibility—
Dew point50°
Mon, 1784° / 69°0.04
84 °
Park Ridge, Monday, 17 August
Light rain. High 84°, low 69°.
Pressure30.00 inHg
Wind5.4 mph S
Humidity81%
Visibility—
Dew point65°
Tue, 1882° / 71°0.01
82 °
Park Ridge, Tuesday, 18 August
Light rain. High 82°, low 71°.
Pressure30.03 inHg
Wind8.4 mph NE
Humidity54%
Visibility—
Dew point62°
Wed, 1987° / 69°0.42
87 °
Park Ridge, Wednesday, 19 August
Rain. High 87°, low 69°.
Pressure29.91 inHg
Wind7.2 mph SW
Humidity48%
Visibility—
Dew point63°
Thu, 2076° / 69°0.01
76 °
Park Ridge, Thursday, 20 August
Light rain. High 76°, low 69°.
Pressure29.91 inHg
Wind8.1 mph NE
Humidity68%
Visibility—
Dew point63°
Fri, 2178° / 66°0
78 °
Park Ridge, Friday, 21 August
Partly cloudy. High 78°, low 66°.
Pressure29.97 inHg
Wind9.2 mph NE
Humidity54%
Visibility—
Dew point59°
Sat, 2276° / 62°0.03
76 °
Park Ridge, Saturday, 22 August
Light rain. High 76°, low 62°.
Pressure29.97 inHg
Wind14 mph NE
Humidity75%
Visibility—
Dew point59°
Sun, 2366° / 58°0
66 °
Park Ridge, Sunday, 23 August
Clear. High 66°, low 58°.
Pressure30.24 inHg
Wind12.4 mph NE
Humidity45%
Visibility—
Dew point43°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2480° / 66°0.12
80 °
Park Ridge, Monday, 24 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.12 in
Chance of precipitation28%
Record high99° (2023)
Record low56° (1965)
Tue, 2580° / 66°0.06
80 °
Park Ridge, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.06 in
Chance of precipitation23%
Record high92° (2021)
Record low51° (2017)
Wed, 2680° / 67°0.15
80 °
Park Ridge, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.15 in
Chance of precipitation33%
Record high95° (2024)
Record low53° (2025)
Thu, 2780° / 68°0.11
80 °
Park Ridge, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high80°
Average low68°
Average precipitation0.11 in
Chance of precipitation32%
Record high98° (2024)
Record low54° (2025)
Fri, 2880° / 67°0.13
80 °
Park Ridge, Friday, 28 August
Climate normal for this date — 60-year average.
Average high80°
Average low67°
Average precipitation0.13 in
Chance of precipitation35%
Record high92° (1984)
Record low52° (1986)
Sat, 2980° / 66°0.11
80 °
Park Ridge, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low66°
Average precipitation0.11 in
Chance of precipitation30%
Record high94° (1984)
Record low49° (1965)
Sun, 3079° / 65°0.13
79 °
Park Ridge, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low65°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (2013)
Record low55° (2004)
Mon, 3178° / 65°0.07
78 °
Park Ridge, Monday, 31 August
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.07 in
Chance of precipitation22%
Record high91° (2012)
Record low54° (2023)
Tue, 0178° / 65°0.12
78 °
Park Ridge, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.12 in
Chance of precipitation32%
Record high92° (2011)
Record low55° (2023)
Wed, 0278° / 65°0.05
78 °
Park Ridge, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.05 in
Chance of precipitation25%
Record high91° (2011)
Record low47° (2017)
Thu, 0378° / 65°0.08
78 °
Park Ridge, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high78°
Average low65°
Average precipitation0.08 in
Chance of precipitation30%
Record high94° (2023)
Record low52° (1974)
Fri, 0477° / 64°0.09
77 °
Park Ridge, Friday, 4 September
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.09 in
Chance of precipitation30%
Record high93° (2023)
Record low49° (2025)
Sat, 0577° / 63°0.08
77 °
Park Ridge, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.08 in
Chance of precipitation22%
Record high90° (2023)
Record low54° (2010)
Sun, 0677° / 64°0.1
77 °
Park Ridge, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low64°
Average precipitation0.1 in
Chance of precipitation33%
Record high92° (1990)
Record low49° (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 Park Ridge, 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 Park Ridge, 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.