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Current weather in Clear Lake is broken clouds.

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This page shows hourly weather forecast for Clear Lake, including temperature, wind, precipitation, humidity and cloud cover.

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Weather data for Clear Lake is updated regularly with the latest available observations and forecasts.

Now · 12:41 AM

Clear Lake Weather & Hourly Forecast

United States · South Dakota · 57247

74°F

Mostly cloudy night

Feels like: 75°F

💧 Humidity 84% 🌡 Pressure 29.91 inHg 💨 Wind 11 mph 👁 Visibility 22.0 mi ☁ Clouds 88% ☀️ UV index 0.0 · Low 🌅 Sunrise — 🌇 Sunset —

Hourly Forecast for Clear Lake

Today

1:00 AM

Mostly cloudy night

74° 💧 None 💨 11 mph H 84%29.91 inHg

4:00 AM

Clear night

72° 💧 0.000 in 💨 10 mph H 95%29.91 inHg

7:00 AM

Severe thunderstorms

68° 💧 1.159 in 💨 14 mph H 98%30.00 inHg

10:00 AM

Light rain

69° 💧 0.037 in 💨 16 mph H 95%29.91 inHg

1:00 PM

Mostly cloudy

75° 💧 None 💨 21 mph H 83%29.88 inHg

4:00 PM

Sunny

81° 💧 None 💨 7 mph H 69%29.88 inHg

7:00 PM

Overcast

75° 💧 None 💨 13 mph H 86%29.91 inHg

10:00 PM

Light rain

72° 💧 0.009 in 💨 14 mph H 96%29.94 inHg

Tomorrow

1:00 AM

Mist at night

71° 💧 None 💨 13 mph H 98%29.91 inHg

4:00 AM

Clear night

70° 💧 None 💨 13 mph H 97%29.88 inHg

7:00 AM

Mostly cloudy

69° 💧 None 💨 13 mph H 96%29.91 inHg

10:00 AM

Overcast

74° 💧 0.115 in 💨 16 mph H 86%29.85 inHg

1:00 PM

Light rain

76° 💧 0.120 in 💨 20 mph H 86%29.83 inHg

4:00 PM

Light thunderstorms

77° 💧 0.032 in 💨 18 mph H 88%29.77 inHg

7:00 PM

Light rain

76° 💧 0.053 in 💨 21 mph H 86%29.71 inHg

10:00 PM

Light rain

71° 💧 0.029 in 💨 24 mph H 97%29.77 inHg

Today

1:00 AM

Mostly cloudy night

74° 💧 None 💨 11 mph H 84%29.91 inHg

2:00 AM

Overcast night

73° 💧 None 💨 12 mph H 89%29.91 inHg

3:00 AM

Mostly cloudy night

73° 💧 None 💨 11 mph H 93%29.91 inHg

4:00 AM

Clear night

72° 💧 None 💨 10 mph H 95%29.91 inHg

5:00 AM

Clear night

72° 💧 None 💨 12 mph H 96%29.88 inHg

6:00 AM

Overcast night

70° 💧 0.000 in 💨 11 mph H 97%29.91 inHg

7:00 AM

Severe thunderstorms

68° 💧 0.472 in 💨 14 mph H 98%30.00 inHg

8:00 AM

Severe thunderstorms

67° 💧 0.450 in 💨 8 mph H 99%30.03 inHg

9:00 AM

Moderate rain

67° 💧 0.236 in 💨 14 mph H 98%29.97 inHg

10:00 AM

Light rain

69° 💧 0.037 in 💨 16 mph H 95%29.91 inHg

11:00 AM

Overcast

71° 💧 0.000 in 💨 18 mph H 91%29.88 inHg

12:00 PM

Mostly cloudy

74° 💧 None 💨 15 mph H 88%29.88 inHg

1:00 PM

Mostly cloudy

75° 💧 None 💨 21 mph H 83%29.88 inHg

2:00 PM

Sunny

78° 💧 None 💨 13 mph H 74%29.88 inHg

3:00 PM

Sunny

80° 💧 None 💨 5 mph H 69%29.88 inHg

4:00 PM

Sunny

81° 💧 None 💨 7 mph H 69%29.88 inHg

5:00 PM

Sunny

80° 💧 None 💨 11 mph H 75%29.88 inHg

6:00 PM

Mostly sunny

77° 💧 None 💨 13 mph H 83%29.91 inHg

7:00 PM

Overcast

75° 💧 None 💨 13 mph H 86%29.91 inHg

8:00 PM

Overcast night

73° 💧 None 💨 11 mph H 92%29.94 inHg

9:00 PM

Overcast night

72° 💧 None 💨 11 mph H 94%29.94 inHg

10:00 PM

Light rain

72° 💧 0.004 in 💨 14 mph H 96%29.94 inHg

11:00 PM

Light rain

71° 💧 0.005 in 💨 15 mph H 97%29.94 inHg

Tomorrow

12:00 AM

Partly cloudy night

71° 💧 None 💨 13 mph H 97%29.94 inHg

1:00 AM

Mist at night

71° 💧 None 💨 13 mph H 98%29.91 inHg

2:00 AM

Fog at night

71° 💧 None 💨 13 mph H 98%29.91 inHg

3:00 AM

Mist at night

71° 💧 None 💨 12 mph H 98%29.91 inHg

4:00 AM

Clear night

70° 💧 None 💨 13 mph H 97%29.88 inHg

5:00 AM

Clear night

70° 💧 None 💨 12 mph H 96%29.88 inHg

6:00 AM

Partly cloudy night

69° 💧 None 💨 12 mph H 97%29.91 inHg

7:00 AM

Mostly cloudy

69° 💧 None 💨 13 mph H 96%29.91 inHg

8:00 AM

Mostly cloudy

70° 💧 None 💨 14 mph H 95%29.91 inHg

9:00 AM

Mostly cloudy

72° 💧 None 💨 14 mph H 91%29.88 inHg

10:00 AM

Overcast

74° 💧 None 💨 16 mph H 86%29.85 inHg

11:00 AM

Light thunderstorms

72° 💧 0.067 in 💨 16 mph H 93%29.88 inHg

12:00 PM

Light rain

72° 💧 0.047 in 💨 20 mph H 95%29.85 inHg

1:00 PM

Light rain

76° 💧 0.013 in 💨 20 mph H 86%29.83 inHg

2:00 PM

Light thunderstorms

78° 💧 0.005 in 💨 16 mph H 81%29.83 inHg

3:00 PM

Thunderstorms

76° 💧 0.102 in 💨 11 mph H 86%29.83 inHg

4:00 PM

Light thunderstorms

77° 💧 0.027 in 💨 18 mph H 88%29.77 inHg

5:00 PM

Mostly cloudy

79° 💧 0.001 in 💨 18 mph H 83%29.74 inHg

6:00 PM

Overcast

78° 💧 0.003 in 💨 18 mph H 82%29.74 inHg

7:00 PM

Light rain

76° 💧 0.014 in 💨 21 mph H 86%29.71 inHg

8:00 PM

Light rain

76° 💧 0.005 in 💨 22 mph H 87%29.74 inHg

9:00 PM

Light rain

73° 💧 0.033 in 💨 23 mph H 93%29.74 inHg

10:00 PM

Light rain

71° 💧 0.025 in 💨 24 mph H 97%29.77 inHg

11:00 PM

Light rain

73° 💧 0.004 in 💨 21 mph H 93%29.74 inHg

Tuesday

12:00 AM

Clear night

74° 💧 None 💨 21 mph H 93%29.74 inHg

1:00 AM

Mostly clear night

74° 💧 None 💨 20 mph H 92%29.71 inHg

2:00 AM

Mostly clear night

73° 💧 None 💨 19 mph H 93%29.71 inHg

3:00 AM

Clear night

73° 💧 None 💨 18 mph H 92%29.71 inHg

4:00 AM

Clear night

73° 💧 None 💨 17 mph H 92%29.71 inHg

5:00 AM

Clear night

73° 💧 None 💨 12 mph H 92%29.74 inHg

6:00 AM

Clear night

72° 💧 None 💨 10 mph H 93%29.74 inHg

7:00 AM

Mostly sunny

71° 💧 None 💨 10 mph H 94%29.74 inHg

4:00 PM

Sunny

79° 💧 None 💨 11 mph H 46%29.83 inHg

7:00 PM

Sunny

75° 💧 None 💨 10 mph H 54%29.83 inHg

10:00 PM

Clear night

73° 💧 None 💨 15 mph H 35%29.85 inHg

Wednesday

1:00 AM

Clear night

69° 💧 None 💨 14 mph H 42%29.88 inHg

4:00 AM

Clear night

64° 💧 None 💨 18 mph H 60%29.94 inHg

7:00 AM

Sunny

61° 💧 None 💨 16 mph H 78%30.00 inHg

10:00 AM

Mostly sunny

65° 💧 None 💨 18 mph H 72%30.06 inHg

1:00 PM

Partly cloudy

69° 💧 None 💨 17 mph H 62%30.06 inHg

4:00 PM

Mostly sunny

70° 💧 None 💨 16 mph H 55%30.03 inHg

7:00 PM

Sunny

68° 💧 None 💨 10 mph H 61%30.00 inHg

10:00 PM

Clear night

63° 💧 None 💨 7 mph H 69%30.03 inHg

Thursday

1:00 AM

Clear night

62° 💧 None 💨 5 mph H 73%30.00 inHg

4:00 AM

Clear night

61° 💧 None 💨 5 mph H 76%30.00 inHg

7:00 AM

Sunny

62° 💧 None 💨 10 mph H 67%29.97 inHg

10:00 AM

Sunny

69° 💧 None 💨 11 mph H 64%29.94 inHg

1:00 PM

Sunny

78° 💧 None 💨 14 mph H 50%29.88 inHg

4:00 PM

Sunny

80° 💧 None 💨 15 mph H 46%29.80 inHg

7:00 PM

Sunny

76° 💧 None 💨 11 mph H 51%29.74 inHg

10:00 PM

Clear night

75° 💧 None 💨 16 mph H 47%29.71 inHg

Friday

1:00 AM

Clear night

72° 💧 None 💨 19 mph H 56%29.68 inHg

4:00 AM

Clear night

70° 💧 None 💨 17 mph H 59%29.65 inHg

7:00 AM

Clear night

67° 💧 None 💨 17 mph H 66%29.62 inHg

10:00 AM

Sunny

71° 💧 None 💨 12 mph H 68%29.62 inHg

1:00 PM

Sunny

78° 💧 None 💨 3 mph H 59%29.62 inHg

7:00 PM

Sunny

80° 💧 None 💨 8 mph H 68%29.71 inHg

Saturday

1:00 AM

Clear night

80° 💧 None 💨 1 mph H 64%29.65 inHg

7:00 AM

Clear night

70° 💧 None 💨 9 mph H 89%29.59 inHg

1:00 PM

Light rain

65° 💧 None 💨 12 mph H 98%29.41 inHg

7:00 PM

Overcast

62° 💧 None 💨 20 mph H 64%29.65 inHg

Sunday

1:00 AM

Overcast night

62° 💧 None 💨 14 mph H 54%29.80 inHg

7:00 AM

Overcast night

56° 💧 None 💨 9 mph H 70%29.94 inHg

1:00 PM

Sunny

50° 💧 None 💨 10 mph H 81%30.06 inHg

7:00 PM

Mostly cloudy

61° 💧 None 💨 14 mph H 47%30.15 inHg

Monday

1:00 AM

Clear night

62° 💧 None 💨 12 mph H 37%30.12 inHg

7:00 AM

Clear night

54° 💧 None 💨 3 mph H 68%30.18 inHg

1:00 PM

Sunny

54° 💧 None 💨 8 mph H 68%30.18 inHg

7:00 PM

Sunny

70° 💧 None 💨 14 mph H 41%30.12 inHg

Tuesday

1:00 AM

Clear night

68° 💧 None 💨 9 mph H 49%30.00 inHg

7:00 AM

Clear night

63° 💧 None 💨 17 mph H 62%30.03 inHg

1:00 PM

Mostly sunny

59° 💧 None 💨 7 mph H 75%30.06 inHg

7:00 PM

Sunny

71° 💧 None 💨 4 mph H 54%30.09 inHg

Wednesday

1:00 AM

Clear night

70° 💧 None 💨 3 mph H 62%30.06 inHg

7:00 AM

Clear night

61° 💧 None 💨 1 mph H 80%30.15 inHg

1:00 PM

Mostly sunny

57° 💧 None 💨 1 mph H 78%30.18 inHg

7:00 PM

Sunny

74° 💧 None 💨 4 mph H 44%30.21 inHg

Thursday

1:00 AM

Mostly clear night

72° 💧 None 💨 3 mph H 51%30.18 inHg

7:00 AM

Mostly cloudy night

62° 💧 None 💨 5 mph H 65%30.24 inHg

1:00 PM

Mostly cloudy

61° 💧 None 💨 6 mph H 75%30.21 inHg

7:00 PM

Overcast

72° 💧 None 💨 8 mph H 62%30.21 inHg

Friday

1:00 AM

Mostly clear night

72° 💧 None 💨 9 mph H 67%30.12 inHg

7:00 AM

Overcast night

63° 💧 None 💨 6 mph H 88%30.09 inHg

1:00 PM

Light rain

62° 💧 None 💨 5 mph H 98%30.06 inHg

7:00 PM

Light rain

71° 💧 None 💨 7 mph H 78%29.97 inHg

Saturday

1:00 AM

Mostly clear night

66° 💧 None 💨 11 mph H 80%29.97 inHg

7:00 AM

Mostly cloudy night

62° 💧 None 💨 10 mph H 79%30.00 inHg

1:00 PM

Mostly sunny

56° 💧 None 💨 9 mph H 90%30.00 inHg

7:00 PM

Mostly cloudy

63° 💧 None 💨 7 mph H 70%30.00 inHg

Sunday

1:00 AM

Overcast night

62° 💧 None 💨 8 mph H 60%29.97 inHg

7:00 AM

Partly cloudy night

52° 💧 None 💨 7 mph H 93%30.09 inHg

1:00 PM

Sunny

46° 💧 None 💨 9 mph H 93%30.21 inHg

In Clear Lake and, more broadly, across the state of South Dakota: Clear skies will persist through the evening, with temperatures remaining quite warm between 84 and 87 degrees Fahrenheit. Expect moderate southeast winds at around 10 mph, with gusts reaching up to 17 mph. A brief chance of rain exists, with a small accumulation of approximately 0.04 inches possible, and the likelihood of rain reaching nearly 100 percent. Overall, it will stay warm and mostly dry tonight, with occasional breezes from the southeast.

15-Day Weather Outlook for Clear Lake

TomorrowTomorrow

Light thunderstorms 79°/69° 💧 None 💨 20 mph

Tuesday, Sep 8Tue Sep 8

Light rain 79°/71° 💧 1.789 in 💨 24 mph

Wednesday, Sep 9Wed Sep 9

Partly cloudy 75°/61° 💧 0.001 in 💨 18 mph

Thursday, Sep 10Thu Sep 10

Sunny 80°/61° 💧 None 💨 15 mph

Friday, Sep 11Fri Sep 11

Sunny 78°/67° 💧 None 💨 19 mph

Saturday, Sep 12Sat Sep 12

Light rain 80°/65° 💧 0.085 in 💨 12 mph

Sunday, Sep 13Sun Sep 13

Overcast 62°/50° 💧 0.097 in 💨 20 mph

Monday, Sep 14Mon Sep 14

Mostly cloudy 62°/54° 💧 None 💨 14 mph

Tuesday, Sep 15Tue Sep 15

Mostly sunny 70°/59° 💧 None 💨 17 mph

Wednesday, Sep 16Wed Sep 16

Mostly sunny 71°/57° 💧 None 💨 4 mph

Thursday, Sep 17Thu Sep 17

Mostly sunny 74°/61° 💧 None 💨 6 mph

Friday, Sep 18Fri Sep 18

Light rain 72°/62° 💧 0.132 in 💨 9 mph

Saturday, Sep 19Sat Sep 19

Light rain 71°/56° 💧 0.569 in 💨 11 mph

Sunday, Sep 20Sun Sep 20

Overcast 63°/46° 💧 0.111 in 💨 9 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Clear Lake

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Clear Lake

Hourly forecast · Updated every 2 hours

Fair

Nearest forecast value 1:00 AM

PM2.5 Fine particles Good 5,2µg/m³

Microscopic particles that can penetrate deep into the lungs. Elevated concentrations can especially affect children, older adults and people with respiratory conditions.

PM10 Particulate matter Good 5,3µg/m³

Includes dust, pollen and other airborne particles. High concentrations may irritate the respiratory system.

O₃ Ozone Fair 75,2µg/m³

Ground-level ozone can irritate the eyes and respiratory system when concentrations are elevated.

NO₂ Nitrogen dioxide Good 1,0µg/m³

A gas emitted mainly by traffic and some industrial activity. High exposure can affect respiratory health.

Air quality is acceptable for most people.

UV & HEALTH

UV, Sun & Health Outlook in Clear Lake

Maximum daily UV Today, tomorrow and the following day show the maximum UV index forecast for each day.

0–2 Low 3–5 Moderate 6–7 High 8–10 Very high 11+ Extreme

Today UV 6,3High 🙂Fair

Tomorrow UV 6,0High 🙂Fair

Tuesday UV 5,9Moderate 😐Moderate

Wednesday UV 5,6Moderate 😐Moderate

Thursday UV 6,0High —Unavailable

Friday UV 6,0High —Unavailable

Saturday UV 5,0Moderate —Unavailable

Hourly UV index today

7:00 AMUV 0,0 8:00 AMUV 0,2 9:00 AMUV 0,7 10:00 AMUV 1,8 11:00 AMUV 3,7 12:00 PMUV 5,8 1:00 PMUV 6,2 2:00 PMUV 6,3 3:00 PMUV 5,7 4:00 PMUV 4,1 5:00 PMUV 2,4 6:00 PMUV 1,0

Today's weather health advice Open today's recommendations.

Strong UV exposure

Protect exposed skin with SPF 30+ sunscreen, wear sunglasses, and try to limit direct midday sun.

Acceptable air quality

Air quality is acceptable for most people. Very sensitive people may want to reduce prolonged exertion.

Comfortable temperature conditions

Temperatures should feel comfortable for most people, with no particular heat or cold precautions needed.

Good conditions for outdoor activities

Outdoor activities can generally be enjoyed normally, with sun protection adjusted to the UV level.

WIND OUTLOOK

Hourly Wind Forecast for Clear Lake

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · CLEAR LAKE, SOUTH DAKOTA

Tonight's Stargazing & Shooting Stars

Excellent observing conditions. Best local viewing window: 5:00 AM–6:00 AM.

88/100Best-hour score

BEST TIME TONIGHT 5:00 AM–6:00 AM Astronomical darkness: 9:45 PM–5:12 AM

☁ Cloud cover 5% Real hourly forecast for the best viewing hour.

☾ Moonlight 30% Waning Crescent · Moon about 35° above the horizon at the best viewing hour.

☄ Meteor activity September ε-Perseids Reference ZHR 8 · Radiant 81° high at the best hour.

✦ Estimated visible meteors 1–4/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min70%

UPCOMING METEOR PERIODSStart, peak and end dates · weather should be checked closer to the peak.

SEP 5–SEP 21

September ε-PerseidsStart SEP 5 · Peak SEP 9 · End SEP 21 · ZHR 8 · 6% Moon at peak

ACTIVE NOW

SEP 20–NOV 20

Southern TauridsStart SEP 20 · Peak NOV 5 · End NOV 20 · ZHR 7 · 20% Moon at peak

UPCOMING

OCT 2–NOV 7

OrionidsStart OCT 2 · Peak OCT 21 · End NOV 7 · ZHR 20 · 77% Moon at peak

UPCOMING

OCT 20–DEC 10

Northern TauridsStart OCT 20 · Peak NOV 12 · End DEC 10 · ZHR 5 · 7% Moon at peak

UPCOMING

Experimental local observing estimate. Weather values come from the hourly forecast already used on this page. Moon position and astronomical darkness are calculated locally from time and coordinates. Meteor-shower ZHR describes ideal conditions and is not the number of meteors a person should expect to see locally.

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Forecast data for Clear Lake were last refreshed today at 12:41 AM. The current forecast period extends through 07/09/2026 at 10:00 PM. Weather, air-quality and UV-index data are provided through WEATHER-INFO.COM. Forecasts are produced automatically from the latest available data and are subject to periodic technical checks. This service is intended for general weather information.