SYLVAN LAKE, SD 57730 Weather Forecast & Current Conditions
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  57730 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

CUSTER, SD
Current Weather
7:53 AM MDT JUL 4, 2025
Broken Clouds
66°F
Feels Like: 66°F
Dewpoint: 54°F
Rel. Hum.: 65%
Visibility: 10 miles
Wind: NW at 3 mph
Pressure:
Last 72 hours

Local Area Snow Depth

South Dakota Current Weather

South Dakota MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  57730 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

SYLVAN LAKE, SD 57730
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
TODAY
Becoming partly cloudy. A chance of showers and thunderstorms. Highs in the lower 80s. Northwest winds 5 to 10 mph. Gusts up to 20 mph this afternoon. Chance of rain 50 percent.
TONIGHT
Partly cloudy with a chance of showers and thunderstorms in the evening, then mostly clear after midnight. Lows around 60. Northwest winds 5 to 10 mph. Chance of rain 40 percent.
SATURDAY
Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. East winds 5 to 10 mph. Gusts up to 20 mph in the afternoon. Chance of rain 40 percent.
SATURDAY NIGHT
Partly cloudy with a chance of thunderstorms. Showers likely in the evening, then a chance of showers after midnight. Lows in the upper 50s. East winds 5 to 10 mph. Gusts up to 20 mph in the evening. Chance of rain 60 percent.
SUNDAY
Partly cloudy in the morning, then mostly sunny with a chance of showers and thunderstorms in the afternoon. Highs in the upper 70s. North winds 5 to 10 mph, becoming southeast with gusts up to 20 mph in the afternoon. Chance of rain 30 percent.
SUNDAY NIGHT
Mostly clear. A slight chance of showers and thunderstorms in the evening, then a chance of showers and thunderstorms after midnight. Lows in the upper 50s. Chance of rain 30 percent.
MONDAY
Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40 percent.
MONDAY NIGHT
Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows around 60. Chance of rain 20 percent.
TUESDAY
Sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent.
TUESDAY NIGHT
Partly cloudy with a slight chance of showers and thunderstorms in the evening, then clear after midnight. Lows in the lower 60s. Chance of rain 20 percent.
WEDNESDAY
Sunny. Highs around 90.
WEDNESDAY NIGHT
Mostly clear. A slight chance of showers and thunderstorms in the evening. Lows in the mid 60s. Chance of rain 20 percent.
THURSDAY
Mostly sunny in the morning, then partly cloudy with a slight chance of showers and thunderstorms in the afternoon. Highs in the upper 80s. Chance of rain 20 percent.

  57730 WEATHER SATELLITE LOOPS
Visible Weather Satellite
SYLVAN LAKE, SD 57730
Infrared Weather Satellite
SYLVAN LAKE, SD 57730
  57730 WEATHER RADAR LOOP
NEXRAD Weather Radar
SYLVAN LAKE, SD 57730
 MOS COMPUTER WEATHER FORECAST

CUSTER, SD 3 hourly weather forecast
weather forecast created  7:00 PM CDT  7/ 3/2025
Friday
4 JUL 2025		 SYLVAN LAKE, SD 57730 weather forecast Day 1, 0 hours 12 AM 69° 69° Mostly Cloudy 19%
RAIN
<.01 in		 0% Thunder
( 15% severe)		 SW   6 57% 53°
Low 62° SYLVAN LAKE, SD 57730 weather forecast Day 1, 3 hours 3 AM 64° 65° Mostly Cloudy NW   5 63% 51°
High 76° SYLVAN LAKE, SD 57730 weather forecast Day 1, 6 hours 6 AM 63° 64° Mostly Cloudy 28%
RAIN
>2 in		 0% Thunder
( 16% severe)		 NNW   5 67% 52°

Mostly Cloudy

Rain Likely

 SYLVAN LAKE, SD 57730 weather forecast Day 1, 9 hours 9 AM 70° 70° Mostly Cloudy NW   6 55% 53°
SYLVAN LAKE, SD 57730 weather forecast Day 1, 12 hours 12 PM 72° 72° Mostly Cloudy 65%
RAIN
***		 0% Thunder
( 49% severe)		 SW   7 49% 52°
SYLVAN LAKE, SD 57730 weather forecast Day 1, 15 hours 3 PM 69° 69° Mostly Cloudy N   7 61% 55°
SYLVAN LAKE, SD 57730 weather forecast Day 1, 18 hours 6 PM 69° 69° Partly Cloudy 37%
RAIN
.01–.1 in		 0% Thunder
( 45% severe)		 NNE   6 63% 56°
SYLVAN LAKE, SD 57730 weather forecast Day 1, 21 hours 9 PM 63° 64° Partly Cloudy WNW   5 78% 56°
Saturday
5 JUL 2025		 SYLVAN LAKE, SD 57730 weather forecast Day 2, 0 hours 12 AM 58° 58° Mostly Cloudy 6%

 0% Thunder
( 11% severe)		 NNW   3 87% 54°
Low 53° SYLVAN LAKE, SD 57730 weather forecast Day 2, 3 hours 3 AM 55° 55° Partly Cloudy NW   2 86% 51°
High 78° SYLVAN LAKE, SD 57730 weather forecast Day 2, 6 hours 6 AM 55° 55° Partly Cloudy 6%

 0% Thunder
( 8% severe)		 NNW   3 86% 51°

Partly Cloudy

Chance of Rain

 SYLVAN LAKE, SD 57730 weather forecast Day 2, 9 hours 9 AM 67° 67° Clear ENE   3 59% 52°
SYLVAN LAKE, SD 57730 weather forecast Day 2, 12 hours 12 PM 74° 74° Partly Cloudy 40%
RAIN
.5–1 in		 0% Thunder
( 43% severe)		 SE   7 43% 50°
SYLVAN LAKE, SD 57730 weather forecast Day 2, 15 hours 3 PM 75° 75° Partly Cloudy SE   8 43% 51°
SYLVAN LAKE, SD 57730 weather forecast Day 2, 18 hours 6 PM 71° 71° Partly Cloudy 50%
RAIN
.5–1 in		 0% Thunder
( 39% severe)		 ESE   7 53% 53°
SYLVAN LAKE, SD 57730 weather forecast Day 2, 21 hours 9 PM 64° 64° Partly Cloudy ESE   6 70% 54°

CUSTER, SD extended weather forecast
BAD DAY
BAD DATE		 BAD DAY
BAD DATE		 BAD DAY
BAD DATE		 BAD DAY
BAD DATE		 BAD DAY
BAD DATE
Low 53° Low 52° Low 54° Low 57° Low 58°
High 77° High 74° High 79° High 84° High 82°
SYLVAN LAKE, SD 57730 weather forecast Day 3 SYLVAN LAKE, SD 57730 weather forecast Day 4 SYLVAN LAKE, SD 57730 weather forecast Day 5 SYLVAN LAKE, SD 57730 weather forecast Day 6 SYLVAN LAKE, SD 57730 weather forecast Day 7
Partly Cloudy
41% Rain		 Partly Cloudy
51% Rain		 Mostly Cloudy
37% Rain		 Partly Cloudy
28% Rain		 Partly Cloudy
24% Rain
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