Flat Lake, SD 14 Day Weather

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Flat Lake, SD Weather - 14-Day Weather Forecast

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Flat Lake SD Weather - Clear - 60°F
Clear
60°F
Updated 1:18 pm
Feels Like 56°F
Humidity 55%
Wind NNE 15 mph
Barometer  30.19 in
Dew Point 44°F
Flat Lake SD Weather - Clear - 16°C
Clear
16°C
Updated 1:18 pm
Feels Like 14°C
Humidity 55%
Wind NNE 24 km/h
Barometer  102.2 kPa
Dew Point 7°C
Flat Lake, SD Weather and Current Conditionsflat lake sd weather forecast

Flat Lake, SD Weather Forecast

Flat Lake South Dakota WeatherFlat Lake, South Dakota Weather Weather Forecast
14 day API weather forecast for Flat Lake. Note: The 7-day Flat 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.
Flat Lake, SD Weather Forecast Dated: 118 PM Wed Oct 21 2026
Expect a cool pattern with a mix of sun and clouds and occasional showers over the coming period. moderate humidity and a stable pattern will dominate.

Wednesday, October 21, 2026

Mid-Morning
Flat Lake Weather - 2026-10-21 - Morning - Sunny
51°F 10°C
Sunny
Mid-Afternoon
Flat Lake Weather - 2026-10-21 - Afternoon - Sunny
67°F 19°C
Sunny
Early-Evening
Flat Lake Weather - 2026-10-21 - Evening - Overcast
59°F 15°C
Overcast
Refreshing around 67°F 19°C, sunny through the afternoon, turning overcast this evening, with lower humidity and steady pressure. Winds turning from the N to the NNE at 7 mph 11 km/h.

Thursday, October 22, 2026

Mid-Morning
Flat Lake Weather - 2026-10-22 - Morning - Cloudy
53°F 12°C
Cloudy
Mid-Afternoon
Flat Lake Weather - 2026-10-22 - Afternoon - Sunny
77°F 25°C
Sunny
Early-Evening
Flat Lake Weather - 2026-10-22 - Evening - Sunny
69°F 21°C
Sunny
Comfortable with temperatures reaching 77°F 25°C, cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and barometric pressure falling. Winds switching from the SSE to the S at 10 mph 15 km/h. Gusts up to 22 mph 36 km/h.

Friday, October 23, 2026

Mid-Morning
Flat Lake Weather - 2026-10-23 - Morning - Overcast
62°F 16°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-23 - Afternoon - Cloudy
73°F 23°C
Cloudy
Early-Evening
Flat Lake Weather - 2026-10-23 - Evening - Overcast
72°F 22°C
Overcast
Enjoyable around 73°F 23°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds moving from the SE to the SSE at 20 mph 31 km/h. Gusts up to 33 mph 54 km/h.

Saturday, October 24, 2026

Mid-Morning
Flat Lake Weather - 2026-10-24 - Morning - Overcast
65°F 18°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-24 - Afternoon - Overcast
64°F 18°C
Overcast
Early-Evening
Flat Lake Weather - 2026-10-24 - Evening - Overcast
58°F 15°C
Overcast
Cool with a high near 64°F 18°C, overcast throughout the day, with lower humidity and barometric pressure rising. Winds swinging from the SSW to the NNW at 9 mph 14 km/h.

Sunday, October 25, 2026

Mid-Morning
Flat Lake Weather - 2026-10-25 - Morning - Overcast
45°F 7°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-25 - Afternoon - Overcast
52°F 11°C
Overcast
Early-Evening
Flat Lake Weather - 2026-10-25 - Evening - Overcast
47°F 8°C
Overcast
Brisk around 52°F 11°C, overcast throughout the day, with steady humidity and steady pressure. Winds shifting from the NNW to the NNE at 10 mph 15 km/h.

Monday, October 26, 2026

Mid-Morning
Flat Lake Weather - 2026-10-26 - Morning - Scattered Showers
39°F 4°C
Scattered Showers
Mid-Afternoon
Flat Lake Weather - 2026-10-26 - Afternoon - Overcast
47°F 8°C
Overcast
Early-Evening
Flat Lake Weather - 2026-10-26 - Evening - Cloudy
42°F 6°C
Cloudy
Cool and brisk at 47°F 8°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds turning from the NE to the SE at 6 mph 10 km/h.

Tuesday, October 27, 2026

Mid-Morning
Flat Lake Weather - 2026-10-27 - Morning - Overcast
42°F 6°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-27 - Afternoon - Cloudy
48°F 9°C
Cloudy
Early-Evening
Flat Lake Weather - 2026-10-27 - Evening - Overcast
50°F 10°C
Overcast
Chilly near 48°F 9°C, cloudy in the morning, becoming overcast through the afternoon and evening, with increasing humidity and barometric pressure falling. Winds out of the SSE at 10 mph 17 km/h.

Wednesday, October 28, 2026

Mid-Morning
Flat Lake Weather - 2026-10-28 - Morning - Overcast
47°F 9°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-28 - Afternoon - Cloudy
52°F 11°C
Cloudy
Early-Evening
Flat Lake Weather - 2026-10-28 - Evening - Overcast
44°F 7°C
Overcast
Crisp with a high near 52°F 11°C, overcast through the afternoon, turning sunny this evening, with lower humidity and barometric pressure rising. Winds moving from the WNW to the NW at 10 mph 17 km/h. Gusts up to 20 mph 31 km/h.

Thursday, October 29, 2026

Mid-Morning
Flat Lake Weather - 2026-10-29 - Morning - Sunny
41°F 5°C
Sunny
Mid-Afternoon
Flat Lake Weather - 2026-10-29 - Afternoon - Sunny
57°F 14°C
Sunny
Early-Evening
Flat Lake Weather - 2026-10-29 - Evening - Sunny
49°F 10°C
Sunny
Brisk around 57°F 14°C, sunny throughout the day, with lower humidity and steady pressure. Winds swinging from the WSW to the W at 6 mph 10 km/h.

Friday, October 30, 2026

Mid-Morning
Flat Lake Weather - 2026-10-30 - Morning - Overcast
45°F 7°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-10-30 - Afternoon - Overcast
55°F 13°C
Overcast
Early-Evening
Flat Lake Weather - 2026-10-30 - Evening - Overcast
52°F 11°C
Overcast
Cool and brisk at 55°F 13°C, overcast throughout the day, with steady humidity and barometric pressure falling. Winds picking up from SE at 11 mph 18 km/h to SSE at 22 mph 35 km/h. Gusts up to 36 mph 58 km/h.

Saturday, October 31, 2026

Mid-Morning
Flat Lake Weather - 2026-10-31 - Morning - Drizzle
46°F 8°C
Drizzle
Mid-Afternoon
Flat Lake Weather - 2026-10-31 - Afternoon - Light Rain
50°F 10°C
Light Rain
Early-Evening
Flat Lake Weather - 2026-10-31 - Evening - Overcast
53°F 12°C
Overcast
Chilly near 50°F 10°C, showers lingering into the afternoon before clearing, with steady humidity and steady pressure. Winds tapering down from SE 14 mph 23 km/h to W 6 mph 10 km/h.

Sunday, November 1, 2026

Mid-Morning
Flat Lake Weather - 2026-11-01 - Morning - Overcast
43°F 6°C
Overcast
Mid-Afternoon
Flat Lake Weather - 2026-11-01 - Afternoon - Overcast
48°F 9°C
Overcast
Early-Evening
Flat Lake Weather - 2026-11-01 - Evening - Sunny
41°F 5°C
Sunny
Crisp with a high near 48°F 9°C, overcast through the afternoon, turning sunny this evening, with steady humidity and barometric pressure rising. Winds switching from the NW to the NNW at 7 mph 12 km/h.

Monday, November 2, 2026

Mid-Morning
Flat Lake Weather - 2026-11-02 - Morning - Sunny
37°F 3°C
Sunny
Mid-Afternoon
Flat Lake Weather - 2026-11-02 - Afternoon - Sunny
49°F 10°C
Sunny
Early-Evening
Flat Lake Weather - 2026-11-02 - Evening - Clear
42°F 6°C
Clear
Brisk around 49°F 10°C, sunny through the afternoon, turning partly cloudy this evening, with lower humidity and steady pressure.

Tuesday, November 3, 2026

Mid-Morning
Flat Lake Weather - 2026-11-03 - Morning - Sunny
42°F 5°C
Sunny
Mid-Afternoon
Flat Lake Weather - 2026-11-03 - Afternoon - Sunny
54°F 12°C
Sunny
Early-Evening
Flat Lake Weather - 2026-11-03 - Evening - Clear
44°F 7°C
Clear
Cool and brisk at 54°F 12°C, sunny throughout the day, with increasing humidity and steady pressure. Winds moving from the NW to the NNE at 8 mph 13 km/h.

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Weather by the Numbers

Wed, 21st
Flat Lake SD Weather - Wednesday, Oct 21, 2026 - Sunny
Hi: 67°F 20°C
Lo: 50°F 10°C
Sunrise 07:54 AM
Sunset 06:32 PM
Wind NNE 10 mph16 km/h
Dew Point 41°F5°C
uv Index 2
Barometric Pressure 30.18 in1022 mb
POP 2% *
Humidity 48%
Thu, 22nd
Flat Lake SD Weather - Thursday, Oct 22, 2026 - Sunny
Hi: 78°F 26°C
Lo: 50°F 10°C
Sunrise 07:55 AM
Sunset 06:30 PM
Wind SSE 11 mph18 km/h
Dew Point 50°F10°C
uv Index 2
Barometric Pressure 30.06 in1018 mb
POP 3% *
Humidity 55%
Fri, 23rd
Flat Lake SD Weather - Friday, Oct 23, 2026 - Patchy Rain Nearby
Hi: 77°F 25°C
Lo: 59°F 15°C
Sunrise 07:56 AM
Sunset 06:28 PM
Wind SSE 19 mph31 km/h
Dew Point 53°F12°C
uv Index 2
Barometric Pressure 29.91 in1013 mb
POP 18% *
Humidity 55%
Sat, 24th
Flat Lake SD Weather - Saturday, Oct 24, 2026 - Overcast
Hi: 69°F 21°C
Lo: 53°F 11°C
Sunrise 07:58 AM
Sunset 06:27 PM
Wind WNW 18 mph28 km/h
Dew Point 45°F7°C
uv Index 4
Barometric Pressure 29.97 in1015 mb
POP 10% *
Humidity 44%
Sun, 25th
Flat Lake SD Weather - Sunday, Oct 25, 2026 - Overcast
Hi: 52°F 11°C
Lo: 43°F 6°C
Sunrise 07:59 AM
Sunset 06:25 PM
Wind N 11 mph18 km/h
Dew Point 19°F-7°C
uv Index 3
Barometric Pressure 30.5 in1033 mb
POP 9% *
Humidity 28%
Mon, 26th
Flat Lake SD Weather - Monday, Oct 26, 2026 - Patchy Rain Nearby
Hi: 48°F 9°C
Lo: 38°F 4°C
Sunrise 08:00 AM
Sunset 06:23 PM
Wind ENE 9 mph14 km/h
Dew Point 23°F-5°C
uv Index 2
Barometric Pressure 30.59 in1036 mb
POP 11% *
Humidity 45%
Tue, 27th
Flat Lake SD Weather - Tuesday, Oct 27, 2026 - Cloudy
Hi: 50°F 10°C
Lo: 41°F 5°C
Sunrise 08:02 AM
Sunset 06:22 PM
Wind SSE 10 mph17 km/h
Dew Point 37°F3°C
uv Index 2
Barometric Pressure 30.24 in1024 mb
POP 17% *
Humidity 75%
Wed, 28th
Flat Lake SD Weather - Wednesday, Oct 28, 2026 - Overcast
Hi: 53°F 11°C
Lo: 39°F 4°C
Sunrise 08:03 AM
Sunset 06:20 PM
Wind NNW 15 mph25 km/h
Dew Point 35°F2°C
uv Index 3
Barometric Pressure 30 in1016 mb
POP 11% *
Humidity 55%
Thu, 29th
Flat Lake SD Weather - Thursday, Oct 29, 2026 - Sunny
Hi: 58°F 14°C
Lo: 35°F 2°C
Sunrise 08:05 AM
Sunset 06:19 PM
Wind W 12 mph20 km/h
Dew Point 17°F-8°C
uv Index 4
Barometric Pressure 30.24 in1024 mb
POP 0% *
Humidity 26%
Fri, 30th
Flat Lake SD Weather - Friday, Oct 30, 2026 - Overcast
Hi: 56°F 13°C
Lo: 40°F 5°C
Sunrise 08:06 AM
Sunset 06:17 PM
Wind SSE 16 mph26 km/h
Dew Point 25°F-4°C
uv Index 3
Barometric Pressure 30.09 in1019 mb
POP 10% *
Humidity 36%
Sat, 31st
Flat Lake SD Weather - Saturday, Oct 31, 2026 - Light Drizzle
Hi: 54°F 12°C
Lo: 45°F 7°C
Sunrise 08:07 AM
Sunset 06:16 PM
Wind SSE 9 mph14 km/h
Dew Point 46°F8°C
uv Index 2
Barometric Pressure 29.44 in997 mb
POP 73% *
Humidity 95%
Sun, 1st
Flat Lake SD Weather - Sunday, Nov 1, 2026 - Overcast
Hi: 49°F 10°C
Lo: 38°F 3°C
Sunrise 08:09 AM
Sunset 06:14 PM
Wind NNW 13 mph20 km/h
Dew Point 35°F2°C
uv Index 2
Barometric Pressure 30 in1016 mb
POP 17% *
Humidity 66%
Mon, 2nd
Flat Lake SD Weather - Monday, Nov 2, 2026 - Sunny
Hi: 49°F 10°C
Lo: 33°F 1°C
Sunrise 07:10 AM
Sunset 05:13 PM
Wind WNW 2 mph3 km/h
Dew Point 29°F-2°C
uv Index 3
Barometric Pressure 30.24 in1024 mb
POP 2% *
Humidity 51%
Tue, 3rd
Flat Lake SD Weather - Tuesday, Nov 3, 2026 - Sunny
Hi: 54°F 12°C
Lo: 38°F 3°C
Sunrise 07:12 AM
Sunset 05:12 PM
Wind NNE 6 mph9 km/h
Dew Point 26°F-3°C
uv Index 4
Barometric Pressure 30.18 in1022 mb
POP 1% *
Humidity 37%
* POP = Probability of Precipitation. Data for 12:00 PM.