As of 23:43 CDT

Weather in Clear Lake, SD

65°

Clear Lake, Saturday, 8 August, 23:43

Partly cloudy. Feels like 64°. High 81°, low 53°.

Pressure29.85 inHg

Wind7.8 mph S

Humidity79%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

Monthly outlook for Clear Lake, SD: average high 81.7°, average low 58.6°. That is 1.4° above the climate normal for August. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 5 days and 1.7 inches. The warmest day looks like 17 August (90.6°), the coolest 21 August (51.9°).

81.7°/58.6°

Average high / low

+1.4°

Above normal

6 / 5

Wet days / normal

1.6 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
8 August – 17 August	81.7°	79.4°	+1.3°
18 August – 27 August	81.9°	78.9°	+1.6°
28 August – 6 September	at normal	77.6°	—

August records over 66 years

99.7°2 August 2022All-time high

43°21 August 2004All-time low

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

Sun, 0981° / 63°

0.41

81 °

Clear Lake, Sunday, 9 August

Heavy rain. High 81°, low 63°.

Pressure29.80 inHg

Wind10.8 mph NE

Humidity56%

Visibility6.2 mi

Dew point64°

Mon, 1089° / 59°

0.27

89 °

Clear Lake, Monday, 10 August

Heavy rain. High 89°, low 59°.

Pressure29.88 inHg

Wind11.7 mph E

Humidity45%

Visibility6.2 mi

Dew point57°

Tue, 1181° / 63°

0.67

81 °

Clear Lake, Tuesday, 11 August

Heavy rain. High 81°, low 63°.

Pressure29.88 inHg

Wind10.2 mph NE

Humidity68%

Visibility6.2 mi

Dew point64°

Wed, 1280° / 61°

80 °

Clear Lake, Wednesday, 12 August

Clear. High 80°, low 61°.

Pressure29.97 inHg

Wind11.3 mph NE

Humidity44%

Visibility6.2 mi

Dew point52°

Thu, 1371° / 59°

0.03

71 °

Clear Lake, Thursday, 13 August

Light rain. High 71°, low 59°.

Pressure30.06 inHg

Wind8.6 mph SE

Humidity61%

Visibility—

Dew point50°

Fri, 1478° / 57°

78 °

Clear Lake, Friday, 14 August

Overcast. High 78°, low 57°.

Pressure30.12 inHg

Wind11.3 mph E

Humidity43%

Visibility—

Dew point51°

Sat, 1583° / 60°

83 °

Clear Lake, Saturday, 15 August

Overcast. High 83°, low 60°.

Pressure30.15 inHg

Wind12 mph SE

Humidity38%

Visibility—

Dew point49°

Sun, 1683° / 59°

0.08

83 °

Clear Lake, Sunday, 16 August

Light rain. High 83°, low 59°.

Pressure30.06 inHg

Wind11.3 mph SW

Humidity54%

Visibility—

Dew point60°

Mon, 1791° / 58°

0.04

91 °

Clear Lake, Monday, 17 August

Light rain. High 91°, low 58°.

Pressure30.00 inHg

Wind8.8 mph SW

Humidity56%

Visibility—

Dew point62°

Tue, 1890° / 66°

90 °

Clear Lake, Tuesday, 18 August

Partly cloudy. High 90°, low 66°.

Pressure29.94 inHg

Wind17.8 mph N

Humidity34%

Visibility—

Dew point51°

Wed, 1976° / 56°

0.03

76 °

Clear Lake, Wednesday, 19 August

Light rain. High 76°, low 56°.

Pressure30.15 inHg

Wind12.4 mph N

Humidity43%

Visibility—

Dew point46°

Thu, 2075° / 60°

0.02

75 °

Clear Lake, Thursday, 20 August

Light rain. High 75°, low 60°.

Pressure30.12 inHg

Wind14.4 mph SW

Humidity51%

Visibility—

Dew point47°

Fri, 2183° / 52°

0.01

83 °

Clear Lake, Friday, 21 August

Light rain. High 83°, low 52°.

Pressure29.91 inHg

Wind16.9 mph S

Humidity33%

Visibility—

Dew point43°

Sat, 2285° / 59°

0.07

85 °

Clear Lake, Saturday, 22 August

Light rain. High 85°, low 59°.

Pressure29.74 inHg

Wind21.4 mph NW

Humidity36%

Visibility—

Dew point50°

Sun, 2382° / 53°

82 °

Clear Lake, Sunday, 23 August

Partly cloudy. High 82°, low 53°.

Pressure29.97 inHg

Wind10.6 mph W

Humidity35%

Visibility—

Dew point44°

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

Mon, 2480° / 63°

0.09

80 °

Clear Lake, Monday, 24 August

Climate normal for this date — 60-year average.

Average high80°

Average low63°

Average precipitation0.09 in

Chance of precipitation25%

Record high91° (1970)

Record low51° (1979)

Tue, 2579° / 63°

0.13

79 °

Clear Lake, Tuesday, 25 August

Climate normal for this date — 60-year average.

Average high79°

Average low63°

Average precipitation0.13 in

Chance of precipitation35%

Record high94° (2020)

Record low48° (1968)

Wed, 2679° / 62°

0.13

79 °

Clear Lake, Wednesday, 26 August

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.13 in

Chance of precipitation30%

Record high96° (1976)

Record low48° (1992)

Thu, 2778° / 62°

0.09

78 °

Clear Lake, Thursday, 27 August

Climate normal for this date — 60-year average.

Average high78°

Average low62°

Average precipitation0.09 in

Chance of precipitation22%

Record high92° (1991)

Record low46° (1986)

Fri, 2879° / 62°

0.11

79 °

Clear Lake, Friday, 28 August

Climate normal for this date — 60-year average.

Average high79°

Average low62°

Average precipitation0.11 in

Chance of precipitation33%

Record high94° (1984)

Record low43° (1965)

Sat, 2979° / 61°

0.07

79 °

Clear Lake, Saturday, 29 August

Climate normal for this date — 60-year average.

Average high79°

Average low61°

Average precipitation0.07 in

Chance of precipitation23%

Record high97° (2012)

Record low47° (1988)

Sun, 3078° / 60°

0.07

78 °

Clear Lake, Sunday, 30 August

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.07 in

Chance of precipitation23%

Record high90° (1976)

Record low47° (2009)

Mon, 3178° / 61°

0.09

78 °

Clear Lake, Monday, 31 August

Climate normal for this date — 60-year average.

Average high78°

Average low61°

Average precipitation0.09 in

Chance of precipitation23%

Record high90° (2013)

Record low46° (1967)

Tue, 0177° / 61°

0.09

77 °

Clear Lake, Tuesday, 1 September

Climate normal for this date — 60-year average.

Average high77°

Average low61°

Average precipitation0.09 in

Chance of precipitation20%

Record high93° (2022)

Record low45° (1974)

Wed, 0278° / 60°

0.13

78 °

Clear Lake, Wednesday, 2 September

Climate normal for this date — 60-year average.

Average high78°

Average low60°

Average precipitation0.13 in

Chance of precipitation27%

Record high95° (2023)

Record low45° (1974)

Thu, 0377° / 60°

0.06

77 °

Clear Lake, Thursday, 3 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.06 in

Chance of precipitation25%

Record high97° (2023)

Record low40° (1974)

Fri, 0477° / 60°

0.09

77 °

Clear Lake, Friday, 4 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.09 in

Chance of precipitation22%

Record high98° (2023)

Record low44° (2025)

Sat, 0577° / 60°

0.09

77 °

Clear Lake, Saturday, 5 September

Climate normal for this date — 60-year average.

Average high77°

Average low60°

Average precipitation0.09 in

Chance of precipitation25%

Record high92° (1960)

Record low40° (1965)

Sun, 0677° / 58°

0.06

77 °

Clear Lake, Sunday, 6 September

Climate normal for this date — 60-year average.

Average high77°

Average low58°

Average precipitation0.06 in

Chance of precipitation20%

Record high96° (1976)

Record low46° (1966)

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, SD 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, SD 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.