As of 22:55 CDT

Weather in Clear Lake, IL

76°

Clear Lake, Saturday, 8 August, 22:55

Clear. Feels like 77°. High 88°, low 70°.

Pressure30.03 inHg

Wind4.5 mph S

Humidity81%

Visibility6.2 mi

Dew point70°

See detailed hourly forecast

Monthly outlook for Clear Lake, IL: average high 82.6°, average low 65.3°. That is 0.3° below the climate normal for August. Precipitation is expected on 8 days (about 3.9 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 11 August (96.4°), the coolest 21 August (53.2°).

82.6°/65.3°

Average high / low

−0.3°

Below normal

8 / 5

Wet days / normal

3.9 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	84.2°	83.2°	+0.5°
18 August – 27 August	80°	83.5°	-1.9°
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 (5 mi).

Sun, 0993° / 71°

93 °

Clear Lake, Sunday, 9 August

Clear. High 93°, low 71°.

Pressure29.94 inHg

Wind15.2 mph S

Humidity61%

Visibility6.2 mi

Dew point73°

Mon, 1095° / 76°

95 °

Clear Lake, Monday, 10 August

Partly cloudy. High 95°, low 76°.

Pressure29.91 inHg

Wind14.6 mph SW

Humidity56%

Visibility6.2 mi

Dew point71°

Tue, 1196° / 72°

0.12

96 °

Clear Lake, Tuesday, 11 August

Rain. High 96°, low 72°.

Pressure29.85 inHg

Wind13.7 mph SW

Humidity62%

Visibility6.2 mi

Dew point70°

Wed, 1283° / 73°

0.4

83 °

Clear Lake, Wednesday, 12 August

Rain. High 83°, low 73°.

Pressure29.85 inHg

Wind1.8 mph N

Humidity79%

Visibility6.2 mi

Dew point75°

Thu, 1383° / 64°

2.97

83 °

Clear Lake, Thursday, 13 August

Heavy rain. High 83°, low 64°.

Pressure29.91 inHg

Wind13.6 mph E

Humidity64%

Visibility—

Dew point67°

Fri, 1478° / 65°

0.04

78 °

Clear Lake, Friday, 14 August

Light rain. High 78°, low 65°.

Pressure30.06 inHg

Wind12.6 mph E

Humidity74%

Visibility—

Dew point66°

Sat, 1572° / 63°

0.11

72 °

Clear Lake, Saturday, 15 August

Light rain. High 72°, low 63°.

Pressure30.21 inHg

Wind14.2 mph E

Humidity83%

Visibility—

Dew point62°

Sun, 1675° / 63°

0.1

75 °

Clear Lake, Sunday, 16 August

Light rain. High 75°, low 63°.

Pressure30.09 inHg

Wind9.2 mph E

Humidity83%

Visibility—

Dew point66°

Mon, 1779° / 64°

0.07

79 °

Clear Lake, Monday, 17 August

Light rain. High 79°, low 64°.

Pressure30.06 inHg

Wind6.3 mph NE

Humidity76%

Visibility—

Dew point67°

Tue, 1883° / 65°

83 °

Clear Lake, Tuesday, 18 August

Overcast. High 83°, low 65°.

Pressure30.03 inHg

Wind5.9 mph SE

Humidity70%

Visibility—

Dew point68°

Wed, 1984° / 63°

84 °

Clear Lake, Wednesday, 19 August

Overcast. High 84°, low 63°.

Pressure29.91 inHg

Wind12.9 mph N

Humidity71%

Visibility—

Dew point72°

Thu, 2074° / 55°

74 °

Clear Lake, Thursday, 20 August

Overcast. High 74°, low 55°.

Pressure30.03 inHg

Wind14.1 mph NE

Humidity60%

Visibility—

Dew point55°

Fri, 2172° / 53°

72 °

Clear Lake, Friday, 21 August

Overcast. High 72°, low 53°.

Pressure30.03 inHg

Wind13.2 mph E

Humidity58%

Visibility—

Dew point54°

Sat, 2279° / 60°

0.11

79 °

Clear Lake, Saturday, 22 August

Light rain. High 79°, low 60°.

Pressure29.85 inHg

Wind13.2 mph S

Humidity70%

Visibility—

Dew point66°

Sun, 2388° / 67°

88 °

Clear Lake, Sunday, 23 August

Mostly clear. High 88°, low 67°.

Pressure29.94 inHg

Wind6.8 mph W

Humidity56%

Visibility—

Dew point66°

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

Mon, 2483° / 66°

0.11

83 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 °

Clear Lake, 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 Clear Lake, 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 Clear Lake, 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.