Sully Lake, SD 14 Day Weather

Feedback E-mail the Weather

Quick Weather Clicks

Sully Lake, SD Weather - 14-Day Weather Forecast

Current Conditions

Settings
Sully Lake SD Weather - Clear - 77°F
Clear
77°F
Updated 11:48 am
Feels Like 72°F
Humidity 65%
Wind ESE 2 mph
Barometer  29.58 in
Dew Point 64°F
Sully Lake SD Weather - Clear - 25°C
Clear
25°C
Updated 11:48 am
Feels Like 22°C
Humidity 65%
Wind ESE 3 km/h
Barometer  100.1 kPa
Dew Point 18°C
Sully Lake, SD Weather and Current Conditionssully lake sd weather forecast

Sully Lake, SD Weather Forecast

Sully Lake South Dakota WeatherSully Lake, South Dakota Weather Weather Forecast
14 day API weather forecast for Sully Lake. Note: The 7-day Sully Lake weather forecast is the most reliable and accurate weather forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days ahead.
Sully Lake, SD Weather Forecast Dated: 1148 AM Fri Sep 11 2026
Expect a mild stretch with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and no major pressure swings will dominate.

Friday, September 11, 2026

Mid-Morning
Sully Lake Weather - 2026-09-11 - Morning - Overcast
65°F 19°C
Overcast
Mid-Afternoon
Sully Lake Weather - 2026-09-11 - Afternoon - Overcast
80°F 27°C
Overcast
Early-Evening
Sully Lake Weather - 2026-09-11 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery near 80°F 27°C, overcast through the afternoon, turning sunny this evening, with lower humidity and barometric pressure rising. Winds picking up from SSE at 11 mph 18 km/h to N at 19 mph 30 km/h. Gusts up to 27 mph 44 km/h.

Saturday, September 12, 2026

Mid-Morning
Sully Lake Weather - 2026-09-12 - Morning - Scattered Showers
55°F 13°C
Scattered Showers
Mid-Afternoon
Sully Lake Weather - 2026-09-12 - Afternoon - Overcast
65°F 18°C
Overcast
Early-Evening
Sully Lake Weather - 2026-09-12 - Evening - Cloudy
65°F 19°C
Cloudy
Mildly cool near 65°F 18°C, scattered downpours possible, with lower humidity and steady pressure. Winds switching from the NNW to the NNE at 7 mph 11 km/h.

Sunday, September 13, 2026

Mid-Morning
Sully Lake Weather - 2026-09-13 - Morning - Scattered Showers
50°F 10°C
Scattered Showers
Mid-Afternoon
Sully Lake Weather - 2026-09-13 - Afternoon - Light Showers
56°F 13°C
Light Showers
Early-Evening
Sully Lake Weather - 2026-09-13 - Evening - Scattered Showers
56°F 14°C
Scattered Showers
Chilly near 56°F 13°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds moving from the E to the ESE at 12 mph 18 km/h. Gusts up to 26 mph 42 km/h.

Monday, September 14, 2026

Mid-Morning
Sully Lake Weather - 2026-09-14 - Morning - Light Showers
55°F 13°C
Light Showers
Mid-Afternoon
Sully Lake Weather - 2026-09-14 - Afternoon - Sunny
73°F 23°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-14 - Evening - Sunny
71°F 22°C
Sunny
Mild temperatures up to 73°F 23°C, early showers breaking for a drier afternoon, with lower humidity and steady pressure. Winds swinging from the SSE to the NW at 14 mph 23 km/h. Gusts up to 23 mph 37 km/h.

Tuesday, September 15, 2026

Mid-Morning
Sully Lake Weather - 2026-09-15 - Morning - Partly Cloudy
50°F 10°C
Partly Cloudy
Mid-Afternoon
Sully Lake Weather - 2026-09-15 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-15 - Evening - Sunny
67°F 19°C
Sunny
Refreshing around 67°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds shifting from the N to the ESE at 6 mph 10 km/h.

Wednesday, September 16, 2026

Mid-Morning
Sully Lake Weather - 2026-09-16 - Morning - Cloudy
50°F 10°C
Cloudy
Mid-Afternoon
Sully Lake Weather - 2026-09-16 - Afternoon - Cloudy
54°F 12°C
Cloudy
Early-Evening
Sully Lake Weather - 2026-09-16 - Evening - Overcast
50°F 10°C
Overcast
Cool and brisk at 54°F 12°C, overcast throughout the day, with steady humidity and steady pressure. Winds SSW at 6 mph 9 km/h.

Thursday, September 17, 2026

Mid-Morning
Sully Lake Weather - 2026-09-17 - Morning - Sunny
50°F 10°C
Sunny
Mid-Afternoon
Sully Lake Weather - 2026-09-17 - Afternoon - Sunny
64°F 18°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-17 - Evening - Sunny
66°F 19°C
Sunny
Comfortable at 64°F 18°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds out of the S at 10 mph 16 km/h.

Friday, September 18, 2026

Mid-Morning
Sully Lake Weather - 2026-09-18 - Morning - Sunny
62°F 17°C
Sunny
Mid-Afternoon
Sully Lake Weather - 2026-09-18 - Afternoon - Sunny
79°F 26°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-18 - Evening - Sunny
77°F 25°C
Sunny
Enjoyable around 79°F 26°C, sunny throughout the day, with lower humidity and steady pressure. Winds moving from the SSW to the ESE at 12 mph 18 km/h. Gusts up to 22 mph 36 km/h.

Saturday, September 19, 2026

Mid-Morning
Sully Lake Weather - 2026-09-19 - Morning - Sunny
58°F 15°C
Sunny
Mid-Afternoon
Sully Lake Weather - 2026-09-19 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-19 - Evening - Sunny
74°F 23°C
Sunny
Mild temperatures up to 72°F 22°C, sunny through the afternoon, turning overcast this evening, with lower humidity and barometric pressure falling.

Sunday, September 20, 2026

Mid-Morning
Sully Lake Weather - 2026-09-20 - Morning - Sunny
65°F 19°C
Sunny
Mid-Afternoon
Sully Lake Weather - 2026-09-20 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-20 - Evening - Partly Cloudy
84°F 29°C
Partly Cloudy
Very warm with a high of 84°F 29°C, sunny in the morning, becoming partly cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds SSE at 15 mph 24 km/h. Gusts up to 28 mph 45 km/h.

Monday, September 21, 2026

Mid-Morning
Sully Lake Weather - 2026-09-21 - Morning - Overcast
72°F 22°C
Overcast
Mid-Afternoon
Sully Lake Weather - 2026-09-21 - Afternoon - Overcast
81°F 27°C
Overcast
Early-Evening
Sully Lake Weather - 2026-09-21 - Evening - Overcast
72°F 22°C
Overcast
Warm and summery near 81°F 27°C, overcast throughout the day, with increasing humidity and barometric pressure falling. Winds out of the S at 23 mph 37 km/h. Gusts up to 31 mph 51 km/h.

Tuesday, September 22, 2026

Mid-Morning
Sully Lake Weather - 2026-09-22 - Morning - Overcast
58°F 15°C
Overcast
Mid-Afternoon
Sully Lake Weather - 2026-09-22 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
Sully Lake Weather - 2026-09-22 - Evening - Sunny
57°F 14°C
Sunny
Cool with a high near 67°F 20°C, cloudy in the morning, sunny in the afternoon, and partly cloudy this evening, with steady humidity and steady pressure. Winds turning from the NNW to the SE at 15 mph 23 km/h. Gusts up to 21 mph 34 km/h.

Wednesday, September 23, 2026

Mid-Morning
Sully Lake Weather - 2026-09-23 - Morning - Scattered Showers
46°F 8°C
Scattered Showers
Mid-Afternoon
Sully Lake Weather - 2026-09-23 - Afternoon - Light Showers
46°F 8°C
Light Showers
Early-Evening
Sully Lake Weather - 2026-09-23 - Evening - Scattered Showers
45°F 7°C
Scattered Showers
Brisk around 46°F 8°C, periods of heavy rain and gusty conditions, with steady humidity and barometric pressure rising. Winds switching from the NE to the ENE at 13 mph 21 km/h. Gusts up to 23 mph 37 km/h.

Thursday, September 24, 2026

Mid-Morning
Sully Lake Weather - 2026-09-24 - Morning - Light Showers
38°F 4°C
Light Showers
Mid-Afternoon
Sully Lake Weather - 2026-09-24 - Afternoon - Light Showers
38°F 3°C
Light Showers
Early-Evening
Sully Lake Weather - 2026-09-24 - Evening - Light Showers
38°F 3°C
Light Showers
Biting cold near 38°F 3°C, persistent showers off and on through the day, with steady humidity and steady pressure. Winds moving from the ENE to the NE at 11 mph 17 km/h.

Trending Headlines

Sully Lake, SD Weather Radar Map

Use the map search tool if you want to place a location marker on the radar map...

Sully Lake, SD 7 Day Weather

National Two Day Weather Forecast


E-mail the Sully Lake Weather Forecast

Voice your opinion or tell us about page issues...

Weather by the Numbers

Fri, 11th
Sully Lake SD Weather - Friday, Sep 11, 2026 - Overcast
Hi: 84°F 29°C
Lo: 61°F 16°C
Sunrise 07:15 AM
Sunset 07:58 PM
Wind SW 5 mph8 km/h
Dew Point 63°F17°C
uv Index 4
Barometric Pressure 29.47 in998 mb
POP 14% *
Humidity 60%
Sat, 12th
Sully Lake SD Weather - Saturday, Sep 12, 2026 - Patchy Rain Nearby
Hi: 67°F 19°C
Lo: 52°F 11°C
Sunrise 07:16 AM
Sunset 07:56 PM
Wind N 11 mph18 km/h
Dew Point 37°F3°C
uv Index 4
Barometric Pressure 30.06 in1018 mb
POP 9% *
Humidity 41%
Sun, 13th
Sully Lake SD Weather - Sunday, Sep 13, 2026 - Patchy Rain Nearby
Hi: 63°F 17°C
Lo: 50°F 10°C
Sunrise 07:17 AM
Sunset 07:55 PM
Wind E 13 mph20 km/h
Dew Point 39°F4°C
uv Index 2
Barometric Pressure 30.09 in1019 mb
POP 19% *
Humidity 60%
Mon, 14th
Sully Lake SD Weather - Monday, Sep 14, 2026 - Overcast
Hi: 75°F 24°C
Lo: 54°F 12°C
Sunrise 07:18 AM
Sunset 07:53 PM
Wind SSW 9 mph14 km/h
Dew Point 57°F14°C
uv Index 1
Barometric Pressure 29.74 in1007 mb
POP 31% *
Humidity 92%
Tue, 15th
Sully Lake SD Weather - Tuesday, Sep 15, 2026 - Sunny
Hi: 69°F 20°C
Lo: 47°F 8°C
Sunrise 07:19 AM
Sunset 07:51 PM
Wind N 8 mph12 km/h
Dew Point 35°F2°C
uv Index 5
Barometric Pressure 30.18 in1022 mb
POP 1% *
Humidity 40%
Wed, 16th
Sully Lake SD Weather - Wednesday, Sep 16, 2026 - Overcast
Hi: 63°F 17°C
Lo: 47°F 8°C
Sunrise 07:21 AM
Sunset 07:49 PM
Wind N 6 mph10 km/h
Dew Point 27°F-3°C
uv Index 3
Barometric Pressure 30.39 in1029 mb
POP 7% *
Humidity 38%
Thu, 17th
Sully Lake SD Weather - Thursday, Sep 17, 2026 - Sunny
Hi: 66°F 19°C
Lo: 49°F 10°C
Sunrise 07:22 AM
Sunset 07:47 PM
Wind SSE 8 mph13 km/h
Dew Point 36°F2°C
uv Index 4
Barometric Pressure 30.39 in1029 mb
POP 1% *
Humidity 46%
Fri, 18th
Sully Lake SD Weather - Friday, Sep 18, 2026 - Sunny
Hi: 81°F 27°C
Lo: 61°F 16°C
Sunrise 07:23 AM
Sunset 07:45 PM
Wind WSW 6 mph10 km/h
Dew Point 52°F11°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 2% *
Humidity 52%
Sat, 19th
Sully Lake SD Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 75°F 24°C
Lo: 58°F 15°C
Sunrise 07:24 AM
Sunset 07:43 PM
Wind ESE 6 mph9 km/h
Dew Point 42°F6°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 1% *
Humidity 43%
Sun, 20th
Sully Lake SD Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 87°F 30°C
Lo: 64°F 18°C
Sunrise 07:25 AM
Sunset 07:41 PM
Wind SSE 14 mph22 km/h
Dew Point 45°F7°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 1% *
Humidity 35%
Mon, 21st
Sully Lake SD Weather - Monday, Sep 21, 2026 - Overcast
Hi: 83°F 28°C
Lo: 66°F 19°C
Sunrise 07:27 AM
Sunset 07:40 PM
Wind S 23 mph37 km/h
Dew Point 48°F9°C
uv Index 5
Barometric Pressure 29.56 in1001 mb
POP 10% *
Humidity 37%
Tue, 22nd
Sully Lake SD Weather - Tuesday, Sep 22, 2026 - Partly Cloudy
Hi: 70°F 21°C
Lo: 49°F 10°C
Sunrise 07:28 AM
Sunset 07:38 PM
Wind NNW 9 mph15 km/h
Dew Point 33°F1°C
uv Index 5
Barometric Pressure 29.8 in1009 mb
POP 2% *
Humidity 32%
Wed, 23rd
Sully Lake SD Weather - Wednesday, Sep 23, 2026 - Patchy Rain Nearby
Hi: 48°F 9°C
Lo: 43°F 6°C
Sunrise 07:29 AM
Sunset 07:36 PM
Wind ENE 10 mph16 km/h
Dew Point 42°F6°C
uv Index 2
Barometric Pressure 30.09 in1019 mb
POP 42% *
Humidity 85%
Thu, 24th
Sully Lake SD Weather - Thursday, Sep 24, 2026 - Light Rain Shower
Hi: 42°F 6°C
Lo: 37°F 3°C
Sunrise 07:30 AM
Sunset 07:34 PM
Wind NE 15 mph25 km/h
Dew Point 36°F2°C
uv Index 1
Barometric Pressure 30.24 in1024 mb
POP 65% *
Humidity 91%
* POP = Probability of Precipitation. Data for 12:00 PM.