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Dewey County SD Weather - Clear - 72°F
Clear
72°F
Updated 2:55 pm
Feels Like 58°F
Humidity 36%
Wind NNW 21 mph
Barometer  30.05 in
Dew Point 44°F
Dewey County SD Weather - Clear - 22°C
Clear
22°C
Updated 2:55 pm
Feels Like 15°C
Humidity 36%
Wind NNW 34 km/h
Barometer  101.7 kPa
Dew Point 7°C
Dewey County, SD Weather and Current Conditionsdewey county sd weather forecast

Dewey County, SD Weather Forecast

Dewey County South Dakota WeatherDewey County, South Dakota Weather Weather Forecast
14 day API forecast for Dewey County, South Dakota. Note. The 7-day weather forecast for Dewey County, SD is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Dewey County, SD Weather Forecast Dated: 255 PM Sat Oct 03 2026
Expect a mild stretch with plenty of sunshine and mostly dry weather over the coming period. comfortable humidity and no major pressure swings will dominate.

Saturday, October 3, 2026

Mid-Morning
Dewey County Weather - 2026-10-03 - Morning - Scattered Showers
61°F 16°C
Scattered Showers
Mid-Afternoon
Dewey County Weather - 2026-10-03 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-03 - Evening - Sunny
63°F 17°C
Sunny
Pleasant near 72°F 22°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds turning from the NNW to the N at 12 mph 19 km/h. Gusts up to 22 mph 36 km/h.

Sunday, October 4, 2026

Mid-Morning
Dewey County Weather - 2026-10-04 - Morning - Sunny
58°F 15°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-04 - Afternoon - Sunny
69°F 20°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-04 - Evening - Sunny
64°F 18°C
Sunny
Comfortable with temperatures reaching 69°F 20°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds switching from the SSE to the ESE at 10 mph 16 km/h. Gusts up to 20 mph 32 km/h.

Monday, October 5, 2026

Mid-Morning
Dewey County Weather - 2026-10-05 - Morning - Sunny
60°F 15°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-05 - Afternoon - Sunny
81°F 27°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-05 - Evening - Sunny
75°F 24°C
Sunny
Quite warm around 81°F 27°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds decreasing from SSE 15 mph 23 km/h to W 7 mph 11 km/h.

Tuesday, October 6, 2026

Mid-Morning
Dewey County Weather - 2026-10-06 - Morning - Sunny
65°F 18°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-06 - Afternoon - Sunny
76°F 25°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-06 - Evening - Sunny
69°F 20°C
Sunny
Mild temperatures up to 76°F 25°C, sunny throughout the day, with steady humidity and steady pressure. Winds swinging from the N to the E at 6 mph 10 km/h.

Wednesday, October 7, 2026

Mid-Morning
Dewey County Weather - 2026-10-07 - Morning - Overcast
62°F 17°C
Overcast
Mid-Afternoon
Dewey County Weather - 2026-10-07 - Afternoon - Overcast
72°F 22°C
Overcast
Early-Evening
Dewey County Weather - 2026-10-07 - Evening - Overcast
65°F 18°C
Overcast
Mild with a high of 72°F 22°C, overcast throughout the day, with steady humidity and steady pressure. Winds shifting from the SSE to the NE at 9 mph 14 km/h.

Thursday, October 8, 2026

Mid-Morning
Dewey County Weather - 2026-10-08 - Morning - Partly Cloudy
58°F 14°C
Partly Cloudy
Mid-Afternoon
Dewey County Weather - 2026-10-08 - Afternoon - Overcast
71°F 22°C
Overcast
Early-Evening
Dewey County Weather - 2026-10-08 - Evening - Sunny
64°F 18°C
Sunny
Pleasant near 71°F 22°C, partly cloudy in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and steady pressure. Winds SE at 12 mph 19 km/h.

Friday, October 9, 2026

Mid-Morning
Dewey County Weather - 2026-10-09 - Morning - Cloudy
58°F 14°C
Cloudy
Mid-Afternoon
Dewey County Weather - 2026-10-09 - Afternoon - Sunny
74°F 23°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-09 - Evening - Sunny
65°F 19°C
Sunny
Comfortable with temperatures reaching 74°F 23°C, cloudy in the morning, becoming sunny through the afternoon and evening, with steady humidity and barometric pressure falling. Winds switching from the ESE to the E at 13 mph 21 km/h. Gusts up to 22 mph 36 km/h.

Saturday, October 10, 2026

Mid-Morning
Dewey County Weather - 2026-10-10 - Morning - Partly Cloudy
65°F 19°C
Partly Cloudy
Mid-Afternoon
Dewey County Weather - 2026-10-10 - Afternoon - Overcast
86°F 30°C
Overcast
Early-Evening
Dewey County Weather - 2026-10-10 - Evening - Overcast
77°F 25°C
Overcast
Quite warm around 86°F 30°C, partly cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds blowing from the SSE at 15 mph 24 km/h. Gusts up to 35 mph 55 km/h.

Sunday, October 11, 2026

Mid-Morning
Dewey County Weather - 2026-10-11 - Morning - Overcast
69°F 20°C
Overcast
Mid-Afternoon
Dewey County Weather - 2026-10-11 - Afternoon - Partly Cloudy
84°F 29°C
Partly Cloudy
Early-Evening
Dewey County Weather - 2026-10-11 - Evening - Cloudy
75°F 24°C
Cloudy
Warm temperatures up to 84°F 29°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and barometric pressure falling. Winds SSE at 19 mph 31 km/h. Gusts up to 35 mph 57 km/h.

Monday, October 12, 2026

Mid-Morning
Dewey County Weather - 2026-10-12 - Morning - Light Rain
49°F 10°C
Light Rain
Mid-Afternoon
Dewey County Weather - 2026-10-12 - Afternoon - Drizzle
48°F 9°C
Drizzle
Early-Evening
Dewey County Weather - 2026-10-12 - Evening - Overcast
49°F 10°C
Overcast
Cool and brisk at 48°F 9°C, intermittent showers through midday, easing by evening, with lower humidity and steady pressure. Winds out of the WNW at 19 mph 31 km/h. Gusts up to 25 mph 40 km/h.

Tuesday, October 13, 2026

Mid-Morning
Dewey County Weather - 2026-10-13 - Morning - Sunny
49°F 9°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-13 - Afternoon - Overcast
58°F 14°C
Overcast
Early-Evening
Dewey County Weather - 2026-10-13 - Evening - Sunny
52°F 11°C
Sunny
Comfortable at 58°F 14°C, sunny in the morning, overcast in the afternoon, and sunny this evening, with lower humidity and barometric pressure rising. Winds blowing from the NW at 24 mph 38 km/h. Gusts up to 26 mph 41 km/h.

Wednesday, October 14, 2026

Mid-Morning
Dewey County Weather - 2026-10-14 - Morning - Cloudy
48°F 9°C
Cloudy
Mid-Afternoon
Dewey County Weather - 2026-10-14 - Afternoon - Partly Cloudy
58°F 14°C
Partly Cloudy
Early-Evening
Dewey County Weather - 2026-10-14 - Evening - Clear
52°F 11°C
Clear
Cool with a high near 58°F 14°C, overcast in the morning, becoming cloudy through the afternoon and evening, with lower humidity and steady pressure. Winds WNW at 23 mph 36 km/h.

Thursday, October 15, 2026

Mid-Morning
Dewey County Weather - 2026-10-15 - Morning - Sunny
55°F 13°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-15 - Afternoon - Sunny
74°F 23°C
Sunny
Early-Evening
Dewey County Weather - 2026-10-15 - Evening - Clear
65°F 18°C
Clear
Enjoyable around 74°F 23°C, sunny throughout the day, with steady humidity and steady pressure. Winds moving from the W to the WNW at 9 mph 13 km/h.

Friday, October 16, 2026

Mid-Morning
Dewey County Weather - 2026-10-16 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Dewey County Weather - 2026-10-16 - Afternoon - Partly Cloudy
70°F 21°C
Partly Cloudy
Early-Evening
Dewey County Weather - 2026-10-16 - Evening - Clear
65°F 18°C
Clear
Mild temperatures up to 70°F 21°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with steady humidity and steady pressure.

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Weather by the Numbers

Sat, 3rd
Dewey County SD Weather - Saturday, Oct 3, 2026 - Sunny
Hi: 72°F 22°C
Lo: 52°F 11°C
Sunrise 06:43 AM
Sunset 06:19 PM
Wind NNW 17 mph28 km/h
Dew Point 44°F7°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 1% *
Humidity 37%
Sun, 4th
Dewey County SD Weather - Sunday, Oct 4, 2026 - Sunny
Hi: 69°F 21°C
Lo: 52°F 11°C
Sunrise 06:45 AM
Sunset 06:17 PM
Wind SSE 8 mph13 km/h
Dew Point 32°F0°C
uv Index 4
Barometric Pressure 30.24 in1024 mb
POP 1% *
Humidity 29%
Mon, 5th
Dewey County SD Weather - Monday, Oct 5, 2026 - Sunny
Hi: 82°F 28°C
Lo: 55°F 13°C
Sunrise 06:46 AM
Sunset 06:15 PM
Wind S 13 mph21 km/h
Dew Point 51°F11°C
uv Index 4
Barometric Pressure 29.83 in1010 mb
POP 1% *
Humidity 46%
Tue, 6th
Dewey County SD Weather - Tuesday, Oct 6, 2026 - Cloudy
Hi: 76°F 25°C
Lo: 61°F 16°C
Sunrise 06:47 AM
Sunset 06:13 PM
Wind N 10 mph15 km/h
Dew Point 38°F3°C
uv Index 4
Barometric Pressure 29.88 in1012 mb
POP 5% *
Humidity 27%
Wed, 7th
Dewey County SD Weather - Wednesday, Oct 7, 2026 - Overcast
Hi: 72°F 22°C
Lo: 57°F 14°C
Sunrise 06:48 AM
Sunset 06:12 PM
Wind NNE 3 mph5 km/h
Dew Point 40°F4°C
uv Index 2
Barometric Pressure 29.94 in1014 mb
POP 10% *
Humidity 35%
Thu, 8th
Dewey County SD Weather - Thursday, Oct 8, 2026 - Sunny
Hi: 71°F 22°C
Lo: 55°F 13°C
Sunrise 06:50 AM
Sunset 06:10 PM
Wind SE 13 mph21 km/h
Dew Point 33°F1°C
uv Index 5
Barometric Pressure 30.03 in1017 mb
POP 1% *
Humidity 28%
Fri, 9th
Dewey County SD Weather - Friday, Oct 9, 2026 - Sunny
Hi: 74°F 23°C
Lo: 55°F 13°C
Sunrise 06:51 AM
Sunset 06:08 PM
Wind SE 11 mph17 km/h
Dew Point 56°F13°C
uv Index 6
Barometric Pressure 29.88 in1012 mb
POP 4% *
Humidity 64%
Sat, 10th
Dewey County SD Weather - Saturday, Oct 10, 2026 - Overcast
Hi: 86°F 30°C
Lo: 59°F 15°C
Sunrise 06:52 AM
Sunset 06:06 PM
Wind S 17 mph27 km/h
Dew Point 44°F7°C
uv Index 6
Barometric Pressure 29.56 in1001 mb
POP 9% *
Humidity 30%
Sun, 11th
Dewey County SD Weather - Sunday, Oct 11, 2026 - Overcast
Hi: 84°F 29°C
Lo: 67°F 19°C
Sunrise 06:54 AM
Sunset 06:05 PM
Wind S 21 mph35 km/h
Dew Point 51°F11°C
uv Index 6
Barometric Pressure 29.38 in995 mb
POP 9% *
Humidity 39%
Mon, 12th
Dewey County SD Weather - Monday, Oct 12, 2026 - Patchy Rain Nearby
Hi: 67°F 20°C
Lo: 46°F 8°C
Sunrise 06:55 AM
Sunset 06:03 PM
Wind NW 23 mph36 km/h
Dew Point 39°F4°C
uv Index 2
Barometric Pressure 29.41 in996 mb
POP 25% *
Humidity 69%
Tue, 13th
Dewey County SD Weather - Tuesday, Oct 13, 2026 - Sunny
Hi: 58°F 14°C
Lo: 45°F 7°C
Sunrise 06:56 AM
Sunset 06:01 PM
Wind WNW 21 mph34 km/h
Dew Point 30°F-1°C
uv Index 4
Barometric Pressure 29.62 in1003 mb
POP 1% *
Humidity 38%
Wed, 14th
Dewey County SD Weather - Wednesday, Oct 14, 2026 - Sunny
Hi: 58°F 14°C
Lo: 44°F 7°C
Sunrise 06:58 AM
Sunset 05:59 PM
Wind W 20 mph32 km/h
Dew Point 27°F-3°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 1% *
Humidity 34%
Thu, 15th
Dewey County SD Weather - Thursday, Oct 15, 2026 - Sunny
Hi: 74°F 23°C
Lo: 48°F 9°C
Sunrise 06:59 AM
Sunset 05:58 PM
Wind W 15 mph24 km/h
Dew Point 36°F2°C
uv Index 5
Barometric Pressure 29.88 in1012 mb
POP 1% *
Humidity 31%
Fri, 16th
Dewey County SD Weather - Friday, Oct 16, 2026 - Sunny
Hi: 70°F 21°C
Lo: 56°F 14°C
Sunrise 07:00 AM
Sunset 05:56 PM
Wind SSE 6 mph10 km/h
Dew Point 39°F4°C
uv Index 5
Barometric Pressure 30.09 in1019 mb
POP 1% *
Humidity 36%
* POP = Probability of Precipitation. Data for 12:00 PM.