As of 16:24 CDT

Weather in Cascade, IL

91°

Cascade, Saturday, 8 August, 16:24

Partly cloudy. Feels like 104°. High 91°, low 71°.

Pressure30.00 inHg

Wind2.6 mph SW

Humidity65%

Visibility6.2 mi

Dew point76°

See detailed hourly forecast

Monthly outlook for Cascade, IL: average high 85.6°, average low 67.1°. That is 1.3° above the climate normal for August. Precipitation is expected on 4 days (about 0.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 10 August (95.2°), the coolest 23 August (56.3°).

85.6°/67.1°

Average high / low

+1.3°

Above normal

4 / 5

Wet days / normal

0.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	85.5°	83.2°	+1.3°
18 August – 27 August	85.6°	83.5°	+1.2°
28 August – 6 September	at normal	81.9°	—

August records over 66 years

99.3°14 August 2007All-time high

47.5°29 August 1986All-time low

Climate normals and records are computed from the nearest reference point — Springfield (11 mi).

Sun, 0993° / 71°

93 °

Cascade, Sunday, 9 August

Overcast. High 93°, low 71°.

Pressure29.94 inHg

Wind15.9 mph S

Humidity64%

Visibility6.2 mi

Dew point74°

Mon, 1095° / 76°

95 °

Cascade, Monday, 10 August

Partly cloudy. High 95°, low 76°.

Pressure29.91 inHg

Wind15.2 mph SW

Humidity55%

Visibility6.2 mi

Dew point72°

Tue, 1193° / 78°

93 °

Cascade, Tuesday, 11 August

Overcast. High 93°, low 78°.

Pressure29.85 inHg

Wind16.7 mph SW

Humidity45%

Visibility6.2 mi

Dew point66°

Wed, 1289° / 73°

0.01

89 °

Cascade, Wednesday, 12 August

Light rain. High 89°, low 73°.

Pressure29.83 inHg

Wind9.9 mph NE

Humidity66%

Visibility6.2 mi

Dew point74°

Thu, 1376° / 67°

0.6

76 °

Cascade, Thursday, 13 August

Rain. High 76°, low 67°.

Pressure29.91 inHg

Wind11.7 mph NE

Humidity84%

Visibility—

Dew point70°

Fri, 1477° / 58°

77 °

Cascade, Friday, 14 August

Clear. High 77°, low 58°.

Pressure30.18 inHg

Wind10.6 mph NE

Humidity47%

Visibility—

Dew point52°

Sat, 1577° / 57°

77 °

Cascade, Saturday, 15 August

Partly cloudy. High 77°, low 57°.

Pressure30.30 inHg

Wind7.9 mph SE

Humidity44%

Visibility—

Dew point49°

Sun, 1680° / 58°

0.02

80 °

Cascade, Sunday, 16 August

Light rain. High 80°, low 58°.

Pressure30.18 inHg

Wind13 mph S

Humidity53%

Visibility—

Dew point59°

Mon, 1785° / 68°

0.11

85 °

Cascade, Monday, 17 August

Light rain. High 85°, low 68°.

Pressure29.94 inHg

Wind13.6 mph SW

Humidity67%

Visibility—

Dew point71°

Tue, 1888° / 71°

88 °

Cascade, Tuesday, 18 August

Overcast. High 88°, low 71°.

Pressure30.00 inHg

Wind10.1 mph NE

Humidity58%

Visibility—

Dew point69°

Wed, 1991° / 69°

91 °

Cascade, Wednesday, 19 August

Overcast. High 91°, low 69°.

Pressure29.91 inHg

Wind9.6 mph S

Humidity55%

Visibility—

Dew point68°

Thu, 2084° / 71°

0.15

84 °

Cascade, Thursday, 20 August

Light rain. High 84°, low 71°.

Pressure29.88 inHg

Wind9.8 mph N

Humidity65%

Visibility—

Dew point70°

Fri, 2184° / 67°

84 °

Cascade, Friday, 21 August

Mostly clear. High 84°, low 67°.

Pressure29.94 inHg

Wind11.2 mph NE

Humidity52%

Visibility—

Dew point62°

Sat, 2291° / 64°

91 °

Cascade, Saturday, 22 August

Light rain. High 91°, low 64°.

Pressure29.91 inHg

Wind15 mph NE

Humidity38%

Visibility—

Dew point56°

Sun, 2376° / 56°

0.04

76 °

Cascade, Sunday, 23 August

Light rain. High 76°, low 56°.

Pressure30.15 inHg

Wind12.1 mph E

Humidity40%

Visibility—

Dew point46°

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

Mon, 2483° / 66°

0.11

83 °

Cascade, Monday, 24 August

Climate normal for this date — 60-year average.

Average high83°

Average low66°

Average precipitation0.11 in

Chance of precipitation25%

Record high97° (2023)

Record low55° (1966)

Tue, 2584° / 67°

0.08

84 °

Cascade, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high84°

Average low67°

Average precipitation0.08 in

Chance of precipitation32%

Record high94° (1983)

Record low56° (1966)

Wed, 2684° / 68°

0.11

84 °

Cascade, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high84°

Average low68°

Average precipitation0.11 in

Chance of precipitation32%

Record high95° (2003)

Record low55° (2025)

Thu, 2784° / 68°

0.09

84 °

Cascade, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high84°

Average low68°

Average precipitation0.09 in

Chance of precipitation32%

Record high94° (1983)

Record low56° (2025)

Fri, 2884° / 67°

0.11

84 °

Cascade, Friday, 28 August

Climate normal for this date — 60-year average.

Average high84°

Average low67°

Average precipitation0.11 in

Chance of precipitation28%

Record high96° (2013)

Record low51° (1986)

Sat, 2983° / 66°

0.08

83 °

Cascade, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high83°

Average low66°

Average precipitation0.08 in

Chance of precipitation27%

Record high95° (1984)

Record low47° (1986)

Sun, 3082° / 66°

0.06

82 °

Cascade, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.06 in

Chance of precipitation22%

Record high96° (2013)

Record low51° (1986)

Mon, 3182° / 66°

0.09

82 °

Cascade, Monday, 31 August

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.09 in

Chance of precipitation33%

Record high97° (2013)

Record low53° (1967)

Tue, 0182° / 66°

0.17

82 °

Cascade, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high82°

Average low66°

Average precipitation0.17 in

Chance of precipitation25%

Record high98° (2011)

Record low50° (1967)

Wed, 0282° / 65°

0.11

82 °

Cascade, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.11 in

Chance of precipitation22%

Record high96° (2011)

Record low51° (2017)

Thu, 0382° / 65°

0.09

82 °

Cascade, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high82°

Average low65°

Average precipitation0.09 in

Chance of precipitation25%

Record high94° (2007)

Record low47° (1974)

Fri, 0481° / 64°

0.1

81 °

Cascade, Friday, 4 September

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.1 in

Chance of precipitation25%

Record high96° (2007)

Record low49° (1974)

Sat, 0581° / 64°

0.04

81 °

Cascade, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.04 in

Chance of precipitation20%

Record high94° (1990)

Record low50° (1974)

Sun, 0681° / 64°

0.05

81 °

Cascade, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high81°

Average low64°

Average precipitation0.05 in

Chance of precipitation23%

Record high95° (1990)

Record low50° (1962)

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 Cascade, 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 Cascade, 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.