Monthly outlook for Franklin Park, IL: average high 85°, average low 69.4°. That is 2.7° above the climate normal for August. Precipitation is expected on 4 days (about 2.2 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 22 August (98.4°), the coolest 9 August (63.8°).
85°/69.4°
Average high / low
+2.7°
Above normal
4 / 6
Wet days / normal
2.2 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
9 August – 18 August
82.3°
80.3°
+1.1°
19 August – 28 August
89.6°
80.3°
+5.2°
29 August – 7 September
at normal
78.5°
—
August records over 66 years
99.3°24 August 2023All-time high
48°29 August 1965All-time low
Climate normals and records are computed from the nearest reference point — Stone Park (2 mi).
Mon, 1089° / 71°1.07
89 °
Franklin Park, Monday, 10 August
Heavy rain. High 89°, low 71°.
Pressure29.88 inHg
Wind4.7 mph N
Humidity71%
Visibility6.2 mi
Dew point73°
Tue, 1183° / 69°0.06
83 °
Franklin Park, Tuesday, 11 August
Light rain. High 83°, low 69°.
Pressure29.85 inHg
Wind4.1 mph NE
Humidity84%
Visibility6.2 mi
Dew point70°
Wed, 1287° / 70°0.03
87 °
Franklin Park, Wednesday, 12 August
Light rain. High 87°, low 70°.
Pressure29.83 inHg
Wind3.9 mph NW
Humidity50%
Visibility6.2 mi
Dew point66°
Thu, 1377° / 68°0
77 °
Franklin Park, Thursday, 13 August
Overcast. High 77°, low 68°.
Pressure30.03 inHg
Wind9.5 mph NE
Humidity47%
Visibility—
Dew point54°
Fri, 1477° / 64°0
77 °
Franklin Park, Friday, 14 August
Partly cloudy. High 77°, low 64°.
Pressure30.15 inHg
Wind9.2 mph NE
Humidity34%
Visibility—
Dew point45°
Sat, 1581° / 66°0
81 °
Franklin Park, Saturday, 15 August
Overcast. High 81°, low 66°.
Pressure30.21 inHg
Wind7.4 mph SE
Humidity31%
Visibility—
Dew point46°
Sun, 1680° / 68°0.01
80 °
Franklin Park, Sunday, 16 August
Light rain. High 80°, low 68°.
Pressure30.09 inHg
Wind4.9 mph SE
Humidity50%
Visibility—
Dew point58°
Mon, 1784° / 67°0.01
84 °
Franklin Park, Monday, 17 August
Light rain. High 84°, low 67°.
Pressure30.06 inHg
Wind6.1 mph E
Humidity47%
Visibility—
Dew point60°
Tue, 1883° / 68°0
83 °
Franklin Park, Tuesday, 18 August
Overcast. High 83°, low 68°.
Pressure30.00 inHg
Wind3.5 mph NE
Humidity58%
Visibility—
Dew point60°
Wed, 1988° / 69°0.15
88 °
Franklin Park, Wednesday, 19 August
Light rain. High 88°, low 69°.
Pressure29.91 inHg
Wind11.9 mph S
Humidity47%
Visibility—
Dew point63°
Thu, 2087° / 77°0
87 °
Franklin Park, Thursday, 20 August
Overcast. High 87°, low 77°.
Pressure29.77 inHg
Wind6.3 mph S
Humidity59%
Visibility—
Dew point68°
Fri, 2186° / 75°0
86 °
Franklin Park, Friday, 21 August
Clear. High 86°, low 75°.
Pressure29.94 inHg
Wind11.5 mph NE
Humidity39%
Visibility—
Dew point57°
Sat, 2298° / 71°0
98 °
Franklin Park, Saturday, 22 August
Clear. High 98°, low 71°.
Pressure29.85 inHg
Wind11.3 mph S
Humidity36%
Visibility—
Dew point62°
Sun, 2394° / 73°0.01
94 °
Franklin Park, Sunday, 23 August
Light rain. High 94°, low 73°.
Pressure29.83 inHg
Wind8.6 mph N
Humidity35%
Visibility—
Dew point61°
Mon, 2483° / 71°0.02
83 °
Franklin Park, Monday, 24 August
Light rain. High 83°, low 71°.
Pressure30.03 inHg
Wind9.3 mph NE
Humidity57%
Visibility—
Dew point64°
From day 17 onward the outlook is built from 60-year climate statistics
Tue, 2581° / 65°0.07
81 °
Franklin Park, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high81°
Average low65°
Average precipitation0.07 in
Chance of precipitation25%
Record high92° (2024)
Record low51° (2017)
Wed, 2681° / 66°0.15
81 °
Franklin Park, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high81°
Average low66°
Average precipitation0.15 in
Chance of precipitation32%
Record high96° (2024)
Record low53° (1964)
Thu, 2781° / 67°0.11
81 °
Franklin Park, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high81°
Average low67°
Average precipitation0.11 in
Chance of precipitation28%
Record high97° (2024)
Record low54° (2025)
Fri, 2880° / 66°0.13
80 °
Franklin Park, 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°0.12
80 °
Franklin Park, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high80°
Average low65°
Average precipitation0.12 in
Chance of precipitation28%
Record high95° (1984)
Record low48° (1965)
Sun, 3079° / 64°0.13
79 °
Franklin Park, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.13 in
Chance of precipitation28%
Record high94° (2013)
Record low53° (1986)
Mon, 3179° / 64°0.08
79 °
Franklin Park, Monday, 31 August
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.08 in
Chance of precipitation18%
Record high91° (2012)
Record low53° (2023)
Tue, 0179° / 64°0.12
79 °
Franklin Park, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.12 in
Chance of precipitation32%
Record high94° (2011)
Record low51° (2009)
Wed, 0279° / 64°0.04
79 °
Franklin Park, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.04 in
Chance of precipitation22%
Record high92° (2008)
Record low48° (2017)
Thu, 0379° / 64°0.09
79 °
Franklin Park, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high79°
Average low64°
Average precipitation0.09 in
Chance of precipitation28%
Record high94° (2023)
Record low51° (1974)
Fri, 0478° / 63°0.09
78 °
Franklin Park, Friday, 4 September
Climate normal for this date — 60-year average.
Average high78°
Average low63°
Average precipitation0.09 in
Chance of precipitation32%
Record high92° (2023)
Record low49° (2025)
Sat, 0578° / 62°0.08
78 °
Franklin Park, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.08 in
Chance of precipitation23%
Record high90° (2023)
Record low52° (2010)
Sun, 0677° / 63°0.11
77 °
Franklin Park, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high77°
Average low63°
Average precipitation0.11 in
Chance of precipitation38%
Record high92° (1990)
Record low49° (2025)
Mon, 0778° / 62°0.09
78 °
Franklin Park, Monday, 7 September
Climate normal for this date — 60-year average.
Average high78°
Average low62°
Average precipitation0.09 in
Chance of precipitation28%
Record high92° (1960)
Record low47° (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 Franklin Park, 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 Franklin Park, 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.