As of 23:42 CDT

Weather in Evergreen Park, IL

70°

Evergreen Park, Saturday, 8 August, 23:42

Clear. Feels like 70°. High 83°, low 69°.

Pressure30.03 inHg

Wind2.5 mph W

Humidity81%

Visibility6.2 mi

Dew point63°

See detailed hourly forecast

Monthly outlook for Evergreen Park, IL: average high 80.5°, average low 66.1°. That is 0.4° above the climate normal for August. Precipitation is expected on 4 days (about 0.7 inches), against a normal of 6 days and 1.9 inches. The warmest day looks like 10 August (88.3°), the coolest 21 August (58.4°).

80.5°/66.1°

Average high / low

+0.4°

Above normal

4 / 6

Wet days / normal

0.7 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	82.1°	80.1°	+1.1°
18 August – 27 August	78°	79.9°	-1.1°
28 August – 6 September	at normal	78.5°	—

August records over 66 years

98.4°24 August 2023All-time high

49.3°29 August 1965All-time low

Sun, 0987° / 65°

0.23

87 °

Evergreen Park, Sunday, 9 August

Rain. High 87°, low 65°.

Pressure29.94 inHg

Wind11.7 mph S

Humidity63%

Visibility6.2 mi

Dew point71°

Mon, 1088° / 72°

0.43

88 °

Evergreen Park, Monday, 10 August

Rain. High 88°, low 72°.

Pressure29.91 inHg

Wind1.6 mph E

Humidity57%

Visibility6.2 mi

Dew point70°

Tue, 1185° / 72°

0.04

85 °

Evergreen Park, Tuesday, 11 August

Light rain. High 85°, low 72°.

Pressure29.83 inHg

Wind9 mph SW

Humidity91%

Visibility6.2 mi

Dew point71°

Wed, 1284° / 70°

84 °

Evergreen Park, Wednesday, 12 August

Overcast. High 84°, low 70°.

Pressure29.85 inHg

Wind4 mph N

Humidity51%

Visibility6.2 mi

Dew point64°

Thu, 1375° / 66°

75 °

Evergreen Park, Thursday, 13 August

Overcast. High 75°, low 66°.

Pressure30.00 inHg

Wind8.8 mph NE

Humidity44%

Visibility—

Dew point51°

Fri, 1480° / 63°

80 °

Evergreen Park, Friday, 14 August

Clear. High 80°, low 63°.

Pressure30.09 inHg

Wind9.7 mph NE

Humidity36%

Visibility—

Dew point49°

Sat, 1573° / 66°

0.01

73 °

Evergreen Park, Saturday, 15 August

Light rain. High 73°, low 66°.

Pressure30.27 inHg

Wind8.2 mph SW

Humidity49%

Visibility—

Dew point49°

Sun, 1679° / 66°

79 °

Evergreen Park, Sunday, 16 August

Overcast. High 79°, low 66°.

Pressure30.12 inHg

Wind4.7 mph S

Humidity44%

Visibility—

Dew point53°

Mon, 1785° / 68°

85 °

Evergreen Park, Monday, 17 August

Overcast. High 85°, low 68°.

Pressure30.03 inHg

Wind5.4 mph SW

Humidity50%

Visibility—

Dew point60°

Tue, 1885° / 69°

85 °

Evergreen Park, Tuesday, 18 August

Overcast. High 85°, low 69°.

Pressure29.97 inHg

Wind10 mph SW

Humidity52%

Visibility—

Dew point62°

Wed, 1977° / 67°

0.04

77 °

Evergreen Park, Wednesday, 19 August

Light rain. High 77°, low 67°.

Pressure29.91 inHg

Wind11.3 mph N

Humidity51%

Visibility—

Dew point54°

Thu, 2069° / 62°

69 °

Evergreen Park, Thursday, 20 August

Overcast. High 69°, low 62°.

Pressure30.06 inHg

Wind9.6 mph NE

Humidity55%

Visibility—

Dew point50°

Fri, 2178° / 58°

78 °

Evergreen Park, Friday, 21 August

Clear. High 78°, low 58°.

Pressure30.06 inHg

Wind9.3 mph NE

Humidity39%

Visibility—

Dew point49°

Sat, 2273° / 60°

73 °

Evergreen Park, Saturday, 22 August

Overcast. High 73°, low 60°.

Pressure29.91 inHg

Wind9.6 mph S

Humidity62%

Visibility—

Dew point55°

Sun, 2386° / 65°

86 °

Evergreen Park, Sunday, 23 August

Clear. High 86°, low 65°.

Pressure29.88 inHg

Wind12.7 mph W

Humidity33%

Visibility—

Dew point51°

From day 17 onward the outlook is built from 60-year climate statistics

Mon, 2480° / 66°

0.14

80 °

Evergreen Park, Monday, 24 August

Climate normal for this date — 60-year average.

Average high80°

Average low66°

Average precipitation0.14 in

Chance of precipitation28%

Record high98° (2023)

Record low57° (1966)

Tue, 2580° / 66°

0.07

80 °

Evergreen Park, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high80°

Average low66°

Average precipitation0.07 in

Chance of precipitation27%

Record high92° (2021)

Record low53° (2017)

Wed, 2681° / 67°

0.16

81 °

Evergreen Park, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high81°

Average low67°

Average precipitation0.16 in

Chance of precipitation32%

Record high95° (2024)

Record low54° (2025)

Thu, 2780° / 67°

0.14

80 °

Evergreen Park, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high80°

Average low67°

Average precipitation0.14 in

Chance of precipitation35%

Record high96° (2024)

Record low55° (2025)

Fri, 2880° / 67°

0.14

80 °

Evergreen Park, Friday, 28 August

Climate normal for this date — 60-year average.

Average high80°

Average low67°

Average precipitation0.14 in

Chance of precipitation38%

Record high92° (1984)

Record low51° (1986)

Sat, 2980° / 66°

0.11

80 °

Evergreen Park, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high80°

Average low66°

Average precipitation0.11 in

Chance of precipitation30%

Record high93° (1984)

Record low49° (1965)

Sun, 3079° / 66°

0.09

79 °

Evergreen Park, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high79°

Average low66°

Average precipitation0.09 in

Chance of precipitation30%

Record high92° (2013)

Record low54° (1986)

Mon, 3178° / 65°

0.06

78 °

Evergreen Park, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low65°

Average precipitation0.06 in

Chance of precipitation23%

Record high89° (2012)

Record low56° (2023)

Tue, 0178° / 65°

0.13

78 °

Evergreen Park, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high78°

Average low65°

Average precipitation0.13 in

Chance of precipitation30%

Record high94° (2011)

Record low54° (1967)

Wed, 0279° / 65°

0.06

79 °

Evergreen Park, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high79°

Average low65°

Average precipitation0.06 in

Chance of precipitation27%

Record high92° (2011)

Record low52° (1965)

Thu, 0379° / 65°

0.07

79 °

Evergreen Park, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high79°

Average low65°

Average precipitation0.07 in

Chance of precipitation27%

Record high93° (2023)

Record low53° (1974)

Fri, 0477° / 64°

0.09

77 °

Evergreen Park, Friday, 4 September

Climate normal for this date — 60-year average.

Average high77°

Average low64°

Average precipitation0.09 in

Chance of precipitation33%

Record high91° (2023)

Record low51° (2025)

Sat, 0577° / 64°

0.07

77 °

Evergreen Park, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high77°

Average low64°

Average precipitation0.07 in

Chance of precipitation27%

Record high90° (2023)

Record low53° (2010)

Sun, 0677° / 64°

0.1

77 °

Evergreen Park, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low64°

Average precipitation0.1 in

Chance of precipitation38%

Record high91° (1990)

Record low50° (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 Evergreen 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 Evergreen 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.