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Current weather in Brant Lake is broken clouds.

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

Now · 1:37 PM

Brant Lake Weather & Hourly Forecast

United States · South Dakota · 57016

58°F

Mostly cloudy

Feels like: 53°F

💧 Humidity 79% 🌡 Pressure 30.30 inHg 💨 Wind 9 mph 👁 Visibility 25.1 mi ☁ Clouds 85% ☀️ UV index 0.6 · Low 🌅 Sunrise 7:13 AM 🌇 Sunset 7:26 PM

Hourly Forecast for Brant Lake

Today

2:00 PM

Overcast

61° 💧 0.001 in 💨 10 mph H 72%30.27 inHg

5:00 PM

Overcast

61° 💧 0.000 in 💨 10 mph H 69%30.24 inHg

8:00 PM

Overcast night

59° 💧 None 💨 10 mph H 75%30.24 inHg

11:00 PM

Overcast night

57° 💧 0.003 in 💨 10 mph H 80%30.30 inHg

Tomorrow

2:00 AM

Overcast night

56° 💧 0.001 in 💨 11 mph H 89%30.27 inHg

5:00 AM

Overcast night

54° 💧 None 💨 10 mph H 91%30.27 inHg

8:00 AM

Mostly cloudy

53° 💧 None 💨 10 mph H 94%30.30 inHg

11:00 AM

Overcast

59° 💧 0.001 in 💨 14 mph H 80%30.30 inHg

2:00 PM

Overcast

63° 💧 None 💨 15 mph H 70%30.24 inHg

5:00 PM

Overcast

64° 💧 None 💨 16 mph H 70%30.21 inHg

8:00 PM

Overcast night

60° 💧 0.006 in 💨 12 mph H 76%30.21 inHg

11:00 PM

Overcast night

59° 💧 0.032 in 💨 13 mph H 80%30.21 inHg

Thursday

2:00 AM

Light rain

58° 💧 0.268 in 💨 11 mph H 87%30.21 inHg

5:00 AM

Light rain

57° 💧 0.041 in 💨 12 mph H 93%30.18 inHg

8:00 AM

Overcast

57° 💧 None 💨 12 mph H 93%30.18 inHg

11:00 AM

Overcast

60° 💧 0.001 in 💨 14 mph H 87%30.18 inHg

Today

2:00 PM

Overcast

61° 💧 0.000 in 💨 10 mph H 72%30.27 inHg

3:00 PM

Overcast

61° 💧 0.001 in 💨 10 mph H 70%30.24 inHg

4:00 PM

Overcast

61° 💧 None 💨 10 mph H 70%30.24 inHg

5:00 PM

Overcast

61° 💧 0.000 in 💨 10 mph H 69%30.24 inHg

6:00 PM

Overcast

61° 💧 None 💨 10 mph H 71%30.24 inHg

7:00 PM

Overcast

60° 💧 None 💨 9 mph H 74%30.24 inHg

8:00 PM

Overcast night

59° 💧 None 💨 10 mph H 75%30.24 inHg

9:00 PM

Overcast night

58° 💧 None 💨 10 mph H 76%30.27 inHg

10:00 PM

Overcast night

57° 💧 None 💨 10 mph H 78%30.27 inHg

11:00 PM

Overcast night

57° 💧 None 💨 10 mph H 80%30.30 inHg

Tomorrow

12:00 AM

Overcast night

57° 💧 0.002 in 💨 10 mph H 84%30.30 inHg

1:00 AM

Overcast night

56° 💧 0.001 in 💨 11 mph H 87%30.30 inHg

2:00 AM

Overcast night

56° 💧 0.001 in 💨 11 mph H 89%30.27 inHg

3:00 AM

Partly cloudy night

55° 💧 None 💨 10 mph H 91%30.27 inHg

4:00 AM

Mostly cloudy night

53° 💧 None 💨 9 mph H 94%30.30 inHg

5:00 AM

Overcast night

54° 💧 None 💨 10 mph H 91%30.27 inHg

6:00 AM

Mostly clear night

54° 💧 None 💨 10 mph H 91%30.27 inHg

7:00 AM

Partly cloudy night

53° 💧 None 💨 9 mph H 95%30.30 inHg

8:00 AM

Mostly cloudy

53° 💧 None 💨 10 mph H 94%30.30 inHg

9:00 AM

Mostly cloudy

55° 💧 None 💨 12 mph H 88%30.30 inHg

10:00 AM

Mostly cloudy

57° 💧 None 💨 13 mph H 84%30.30 inHg

11:00 AM

Overcast

59° 💧 None 💨 14 mph H 80%30.30 inHg

12:00 PM

Overcast

60° 💧 None 💨 15 mph H 77%30.30 inHg

1:00 PM

Overcast

63° 💧 0.001 in 💨 15 mph H 72%30.27 inHg

2:00 PM

Overcast

63° 💧 None 💨 15 mph H 70%30.24 inHg

3:00 PM

Overcast

64° 💧 None 💨 15 mph H 69%30.21 inHg

4:00 PM

Overcast

64° 💧 None 💨 16 mph H 69%30.21 inHg

5:00 PM

Overcast

64° 💧 None 💨 16 mph H 70%30.21 inHg

6:00 PM

Overcast

63° 💧 None 💨 14 mph H 73%30.21 inHg

7:00 PM

Overcast

61° 💧 None 💨 12 mph H 75%30.21 inHg

8:00 PM

Overcast night

60° 💧 None 💨 12 mph H 76%30.21 inHg

9:00 PM

Overcast night

60° 💧 None 💨 12 mph H 78%30.24 inHg

10:00 PM

Light rain

59° 💧 0.006 in 💨 12 mph H 79%30.24 inHg

11:00 PM

Overcast night

59° 💧 0.001 in 💨 13 mph H 80%30.21 inHg

Thursday

12:00 AM

Light thunderstorms

59° 💧 0.024 in 💨 14 mph H 83%30.18 inHg

1:00 AM

Light rain

58° 💧 0.007 in 💨 13 mph H 86%30.21 inHg

2:00 AM

Light rain

58° 💧 0.017 in 💨 11 mph H 87%30.21 inHg

3:00 AM

Thunderstorms

57° 💧 0.127 in 💨 13 mph H 90%30.18 inHg

4:00 AM

Thunderstorms

57° 💧 0.123 in 💨 14 mph H 92%30.18 inHg

5:00 AM

Light rain

57° 💧 0.038 in 💨 12 mph H 93%30.18 inHg

6:00 AM

Overcast night

57° 💧 0.002 in 💨 13 mph H 93%30.18 inHg

7:00 AM

Overcast night

57° 💧 0.001 in 💨 12 mph H 93%30.18 inHg

8:00 AM

Overcast

57° 💧 None 💨 12 mph H 93%30.18 inHg

9:00 AM

Overcast

58° 💧 None 💨 11 mph H 91%30.18 inHg

10:00 AM

Overcast

59° 💧 None 💨 13 mph H 90%30.18 inHg

11:00 AM

Overcast

60° 💧 None 💨 14 mph H 87%30.18 inHg

12:00 PM

Overcast

62° 💧 0.001 in 💨 13 mph H 84%30.18 inHg

1:00 PM

Overcast

62° 💧 None 💨 12 mph H 85%30.18 inHg

2:00 PM

Overcast

63° 💧 None 💨 11 mph H 83%30.15 inHg

3:00 PM

Overcast

64° 💧 None 💨 10 mph H 83%30.15 inHg

4:00 PM

Overcast

64° 💧 None 💨 10 mph H 83%30.15 inHg

5:00 PM

Overcast

64° 💧 None 💨 8 mph H 85%30.15 inHg

6:00 PM

Overcast

63° 💧 None 💨 7 mph H 86%30.15 inHg

7:00 PM

Overcast

62° 💧 0.001 in 💨 6 mph H 90%30.15 inHg

Friday

4:00 AM

Overcast night

58° 💧 None 💨 10 mph H 95%30.18 inHg

7:00 AM

Overcast night

58° 💧 None 💨 10 mph H 94%30.18 inHg

10:00 AM

Light rain

59° 💧 None 💨 13 mph H 92%30.18 inHg

1:00 PM

Overcast

59° 💧 None 💨 14 mph H 95%30.15 inHg

4:00 PM

Light rain

63° 💧 None 💨 17 mph H 83%30.06 inHg

7:00 PM

Overcast

61° 💧 None 💨 16 mph H 87%30.03 inHg

10:00 PM

Light rain

60° 💧 None 💨 16 mph H 91%30.00 inHg

Saturday

1:00 AM

Light rain

59° 💧 None 💨 16 mph H 96%29.94 inHg

4:00 AM

Light rain

61° 💧 None 💨 13 mph H 97%29.91 inHg

7:00 AM

Light rain

61° 💧 None 💨 12 mph H 97%29.88 inHg

10:00 AM

Overcast

63° 💧 None 💨 11 mph H 97%29.88 inHg

1:00 PM

Overcast

66° 💧 None 💨 13 mph H 91%29.85 inHg

4:00 PM

Overcast

70° 💧 None 💨 12 mph H 84%29.83 inHg

7:00 PM

Partly cloudy

68° 💧 None 💨 7 mph H 92%29.85 inHg

10:00 PM

Clear night

65° 💧 None 💨 7 mph H 96%29.91 inHg

Sunday

1:00 AM

Clear night

64° 💧 None 💨 6 mph H 98%29.91 inHg

4:00 AM

Mostly clear night

62° 💧 None 💨 4 mph H 100%29.91 inHg

7:00 AM

Overcast night

62° 💧 None 💨 6 mph H 100%29.94 inHg

10:00 AM

Overcast

65° 💧 None 💨 7 mph H 99%29.94 inHg

1:00 PM

Overcast

75° 💧 None 💨 9 mph H 78%29.94 inHg

4:00 PM

Partly cloudy

78° 💧 None 💨 9 mph H 66%29.88 inHg

7:00 PM

Sunny

72° 💧 None 💨 5 mph H 81%29.88 inHg

10:00 PM

Clear night

67° 💧 None 💨 7 mph H 91%29.88 inHg

Monday

1:00 AM

Mostly clear night

66° 💧 None 💨 9 mph H 96%29.88 inHg

7:00 AM

Clear night

66° 💧 None 💨 9 mph H 95%29.91 inHg

1:00 PM

Overcast

64° 💧 None 💨 7 mph H 100%29.91 inHg

7:00 PM

Overcast

65° 💧 None 💨 10 mph H 92%29.88 inHg

Tuesday

1:00 AM

Overcast night

70° 💧 None 💨 2 mph H 89%29.83 inHg

7:00 AM

Overcast night

63° 💧 None 💨 5 mph H 98%29.88 inHg

1:00 PM

Overcast

62° 💧 None 💨 6 mph H 98%29.85 inHg

7:00 PM

Light rain

67° 💧 None 💨 10 mph H 83%29.88 inHg

Wednesday

1:00 AM

Moderate rain

63° 💧 None 💨 7 mph H 93%29.85 inHg

7:00 AM

Overcast night

61° 💧 None 💨 10 mph H 91%29.88 inHg

1:00 PM

Overcast

60° 💧 None 💨 9 mph H 95%29.88 inHg

7:00 PM

Overcast

62° 💧 None 💨 11 mph H 83%29.94 inHg

Thursday

1:00 AM

Light rain

61° 💧 None 💨 9 mph H 94%29.91 inHg

7:00 AM

Overcast night

59° 💧 None 💨 10 mph H 89%29.97 inHg

1:00 PM

Overcast

59° 💧 None 💨 9 mph H 94%29.97 inHg

7:00 PM

Moderate rain

62° 💧 None 💨 8 mph H 93%29.97 inHg

Friday

1:00 AM

Light rain

64° 💧 None 💨 6 mph H 94%29.88 inHg

7:00 AM

Overcast night

64° 💧 None 💨 8 mph H 97%29.91 inHg

1:00 PM

Overcast

64° 💧 None 💨 7 mph H 99%29.94 inHg

7:00 PM

Light rain

72° 💧 None 💨 11 mph H 80%29.94 inHg

Saturday

1:00 AM

Mostly clear night

71° 💧 None 💨 8 mph H 83%29.85 inHg

7:00 AM

Mostly clear night

67° 💧 None 💨 11 mph H 93%29.88 inHg

1:00 PM

Partly cloudy

66° 💧 None 💨 11 mph H 97%29.85 inHg

7:00 PM

Overcast

71° 💧 None 💨 15 mph H 82%29.83 inHg

Sunday

1:00 AM

Mostly cloudy night

72° 💧 None 💨 9 mph H 79%29.80 inHg

7:00 AM

Partly cloudy night

61° 💧 None 💨 15 mph H 67%29.97 inHg

1:00 PM

Mostly sunny

51° 💧 None 💨 14 mph H 75%30.15 inHg

7:00 PM

Mostly sunny

58° 💧 None 💨 13 mph H 56%30.27 inHg

Monday

1:00 AM

Clear night

54° 💧 None 💨 5 mph H 64%30.27 inHg

7:00 AM

Partly cloudy night

47° 💧 None 💨 2 mph H 87%30.30 inHg

1:00 PM

Sunny

44° 💧 None 💨 3 mph H 92%30.30 inHg

7:00 PM

Mostly cloudy

58° 💧 None 💨 9 mph H 56%30.24 inHg

Tuesday

1:00 AM

Overcast night

54° 💧 None 💨 6 mph H 69%30.15 inHg

7:00 AM

Mostly cloudy night

48° 💧 None 💨 7 mph H 85%30.15 inHg

1:00 PM

Sunny

46° 💧 None 💨 5 mph H 94%30.12 inHg

7:00 PM

Sunny

64° 💧 None 💨 5 mph H 62%30.12 inHg

Wednesday

1:00 AM

Clear night

59° 💧 None 💨 4 mph H 82%30.12 inHg

In Brant Lake and, more broadly, across the state of South Dakota: This morning will start with mostly cloudy skies and cool temperatures around 52 to 56 degrees Fahrenheit. Winds will be coming from the east at about 10 mph, with gusts reaching up to 17 mph. There is a possibility of light rain throughout the day, with total accumulation around 0.16 inches. As the afternoon progresses, the cloudy conditions are expected to persist, and the chance of rain remains high. Temperatures are likely to stay in the same cool range, and breezes from the east will continue at similar speeds. Overall, it will be a damp, breezy day with limited sunshine. Be prepared for possible showers if you're heading outdoors.

15-Day Weather Outlook for Brant Lake

TomorrowTomorrow

Overcast 64°/53° 💧 None 💨 16 mph

Thursday, Sep 24Thu Sep 24

Light thunderstorms 64°/57° 💧 None 💨 14 mph

Friday, Sep 25Fri Sep 25

Light rain 63°/58° 💧 0.579 in 💨 17 mph

Saturday, Sep 26Sat Sep 26

Light rain 70°/59° 💧 0.506 in 💨 16 mph

Sunday, Sep 27Sun Sep 27

Overcast 78°/62° 💧 0.002 in 💨 9 mph

Monday, Sep 28Mon Sep 28

Overcast 66°/64° 💧 0.853 in 💨 10 mph

Tuesday, Sep 29Tue Sep 29

Light rain 70°/62° 💧 0.261 in 💨 10 mph

Wednesday, Sep 30Wed Sep 30

Moderate rain 63°/60° 💧 0.435 in 💨 11 mph

Thursday, Oct 1Thu Oct 1

Moderate rain 62°/59° 💧 0.394 in 💨 10 mph

Friday, Oct 2Fri Oct 2

Light rain 72°/64° 💧 0.175 in 💨 11 mph

Saturday, Oct 3Sat Oct 3

Mostly sunny 71°/66° 💧 0.040 in 💨 15 mph

Sunday, Oct 4Sun Oct 4

Mostly cloudy 72°/51° 💧 0.032 in 💨 15 mph

Monday, Oct 5Mon Oct 5

Partly cloudy 58°/44° 💧 None 💨 9 mph

Tuesday, Oct 6Tue Oct 6

Overcast 64°/46° 💧 None 💨 7 mph

Wednesday, Oct 7Wed Oct 7

Sunny 59°/59° 💧 None 💨 4 mph

TEMPERATURE OUTLOOK

Temperature & Weather Trends in Brant Lake

Vertical axis: °F · Color based on temperature

AIR QUALITY FORECAST

Air Quality Forecast for Brant Lake

Hourly forecast · Updated every 2 hours

Good

Nearest forecast value 2:00 PM

PM2.5 Fine particles Good 1,2µg/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 1,3µg/m³

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

O₃ Ozone Good 43,5µg/m³

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

NO₂ Nitrogen dioxide Good 1,8µg/m³

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

Air quality is favorable for outdoor activities.

UV & HEALTH

UV, Sun & Health Outlook in Brant 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 2,7Low 😊Good

Tomorrow UV 5,1Moderate 🙂Fair

Thursday UV 0,7Low 🙂Fair

Friday UV 0,6Low 😊Good

Saturday UV 4,0Moderate 🙂Fair

Sunday UV 6,0High —Unavailable

Monday UV 5,0Moderate —Unavailable

Hourly UV index today

2:00 PMUV 2,7 3:00 PMUV 1,9 4:00 PMUV 1,7 5:00 PMUV 0,9 6:00 PMUV 0,3 7:00 PMUV 0,0

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

Low UV risk

UV radiation will be low, although basic protection is still advisable during prolonged exposure.

Good air quality

Air quality is good and outdoor activities can be enjoyed normally.

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 Brant Lake

Vertical axis: mph · Horizontal axis: hours

Sustained wind Max gusts

NIGHT SKY · BRANT LAKE, SOUTH DAKOTA

Tonight's Stargazing & Shooting Stars

Good observing conditions. Best local viewing window: 6:00 AM–7:00 AM.

79/100Best-hour score

BEST TIME TONIGHT 6:00 AM–7:00 AM Astronomical darkness: 9:02 PM–5:39 AM

☁ Cloud cover 26% Real hourly forecast for the best viewing hour.

☾ Moonlight 89% Waxing Gibbous · Moon below the horizon at the best viewing hour.

☄ Meteor activity Southern Taurids Reference ZHR 7 · Radiant 57° high at the best hour.

✦ Estimated visible meteors 1–3/hour Local estimate after weather, moonlight and radiant-height adjustments.

Chance ≥1 meteor in 30 min62%

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

SEP 20–NOV 20

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

ACTIVE NOW

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

NOV 6–NOV 30

LeonidsStart NOV 6 · Peak NOV 17 · End NOV 30 · ZHR 15 · 52% 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 Brant Lake were last refreshed today at 12:58 PM. The current forecast period extends through 24/09/2026 at 11:00 AM. 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.