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Long Valley SD Weather - Clear - 55°F
Clear
55°F
Updated 8:30 pm
Feels Like 57°F
Humidity 62%
Wind E 5 mph
Barometer  30.06 in
Dew Point 42°F
Long Valley SD Weather - Clear - 13°C
Clear
13°C
Updated 8:30 pm
Feels Like 14°C
Humidity 62%
Wind E 8 km/h
Barometer  101.8 kPa
Dew Point 6°C
Long Valley, SD Weather and Current Conditionslong valley sd weather forecast

Long Valley, SD Weather Forecast

Long Valley South Dakota WeatherLong Valley, South Dakota Weather Weather Forecast
14 day API weather forecast for Long Valley, South Dakota. Note: The 7-day weather forecast for Long Valley, SD 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.
Long Valley, SD Weather Forecast Dated: 830 PM Sat Sep 12 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.

Saturday, September 12, 2026

Mid-Morning
Long Valley Weather - 2026-09-12 - Morning - Sunny
54°F 12°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-12 - Afternoon - Overcast
69°F 21°C
Overcast
Early-Evening
Long Valley Weather - 2026-09-12 - Evening - Overcast
67°F 19°C
Overcast
Pleasant near 69°F 21°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds turning from the N to the E at 10 mph 15 km/h. Gusts up to 20 mph 32 km/h.

Sunday, September 13, 2026

Mid-Morning
Long Valley Weather - 2026-09-13 - Morning - Partly Cloudy
57°F 14°C
Partly Cloudy
Mid-Afternoon
Long Valley Weather - 2026-09-13 - Afternoon - Cloudy
74°F 24°C
Cloudy
Early-Evening
Long Valley Weather - 2026-09-13 - Evening - Partly Cloudy
67°F 20°C
Partly Cloudy
Comfortable with temperatures reaching 74°F 24°C, cloudy throughout the day, with steady humidity and barometric pressure falling. Winds switching from the ESE to the SE at 21 mph 34 km/h. Gusts up to 33 mph 53 km/h.

Monday, September 14, 2026

Mid-Morning
Long Valley Weather - 2026-09-14 - Morning - Overcast
66°F 19°C
Overcast
Mid-Afternoon
Long Valley Weather - 2026-09-14 - Afternoon - Partly Cloudy
75°F 24°C
Partly Cloudy
Early-Evening
Long Valley Weather - 2026-09-14 - Evening - Sunny
72°F 23°C
Sunny
Enjoyable around 75°F 24°C, overcast in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure rising. Winds moving from the SSW to the N at 11 mph 18 km/h. Gusts up to 21 mph 35 km/h.

Tuesday, September 15, 2026

Mid-Morning
Long Valley Weather - 2026-09-15 - Morning - Sunny
52°F 11°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-15 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
Long Valley Weather - 2026-09-15 - Evening - Sunny
68°F 20°C
Sunny
Cool with a high near 67°F 20°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and barometric pressure falling. Winds swinging from the N to the ESE at 13 mph 20 km/h. Gusts up to 21 mph 34 km/h.

Wednesday, September 16, 2026

Mid-Morning
Long Valley Weather - 2026-09-16 - Morning - Light Showers
57°F 14°C
Light Showers
Mid-Afternoon
Long Valley Weather - 2026-09-16 - Afternoon - Cloudy
63°F 17°C
Cloudy
Early-Evening
Long Valley Weather - 2026-09-16 - Evening - Overcast
56°F 13°C
Overcast
Refreshing around 63°F 17°C, scattered morning showers before drying out later, with steady humidity and barometric pressure rising. Winds shifting from the SE to the E at 13 mph 21 km/h.

Thursday, September 17, 2026

Mid-Morning
Long Valley Weather - 2026-09-17 - Morning - Scattered Showers
54°F 12°C
Scattered Showers
Mid-Afternoon
Long Valley Weather - 2026-09-17 - Afternoon - Overcast
74°F 23°C
Overcast
Early-Evening
Long Valley Weather - 2026-09-17 - Evening - Overcast
66°F 19°C
Overcast
Pleasant near 74°F 23°C, locally heavy downpours at times, with lower humidity and barometric pressure falling. Winds turning from the ESE to the SSE at 14 mph 23 km/h. Gusts up to 21 mph 34 km/h.

Friday, September 18, 2026

Mid-Morning
Long Valley Weather - 2026-09-18 - Morning - Heavy Rain Showers
56°F 14°C
Heavy Rain Showers
Mid-Afternoon
Long Valley Weather - 2026-09-18 - Afternoon - Light Showers
56°F 13°C
Light Showers
Early-Evening
Long Valley Weather - 2026-09-18 - Evening - Light Showers
55°F 13°C
Light Showers
Chilly near 56°F 13°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds switching from the E to the NNE at 12 mph 19 km/h.

Saturday, September 19, 2026

Mid-Morning
Long Valley Weather - 2026-09-19 - Morning - Partly Cloudy
56°F 13°C
Partly Cloudy
Mid-Afternoon
Long Valley Weather - 2026-09-19 - Afternoon - Sunny
67°F 20°C
Sunny
Early-Evening
Long Valley Weather - 2026-09-19 - Evening - Sunny
68°F 20°C
Sunny
Cool with a high near 67°F 20°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds moving from the N to the SE at 8 mph 12 km/h.

Sunday, September 20, 2026

Mid-Morning
Long Valley Weather - 2026-09-20 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-20 - Afternoon - Sunny
70°F 21°C
Sunny
Early-Evening
Long Valley Weather - 2026-09-20 - Evening - Sunny
69°F 21°C
Sunny
Mild temperatures up to 70°F 21°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the S to the SSE at 13 mph 21 km/h. Gusts up to 25 mph 41 km/h.

Monday, September 21, 2026

Mid-Morning
Long Valley Weather - 2026-09-21 - Morning - Sunny
59°F 15°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-21 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Long Valley Weather - 2026-09-21 - Evening - Sunny
71°F 22°C
Sunny
Mild with a high of 72°F 22°C, sunny throughout the day, with steady humidity and steady pressure. Winds shifting from the S to the SSE at 13 mph 21 km/h. Gusts up to 25 mph 40 km/h.

Tuesday, September 22, 2026

Mid-Morning
Long Valley Weather - 2026-09-22 - Morning - Overcast
60°F 16°C
Overcast
Mid-Afternoon
Long Valley Weather - 2026-09-22 - Afternoon - Overcast
74°F 23°C
Overcast
Early-Evening
Long Valley Weather - 2026-09-22 - Evening - Overcast
78°F 25°C
Overcast
Pleasant near 74°F 23°C, overcast throughout the day, with steady humidity and steady pressure. Winds tapering down from S 14 mph 22 km/h to NNW 4 mph 7 km/h.

Wednesday, September 23, 2026

Mid-Morning
Long Valley Weather - 2026-09-23 - Morning - Sunny
55°F 13°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-23 - Afternoon - Sunny
64°F 18°C
Sunny
Early-Evening
Long Valley Weather - 2026-09-23 - Evening - Sunny
65°F 18°C
Sunny
Cool with a high near 64°F 18°C, sunny throughout the day, with steady humidity and steady pressure. Winds switching from the NE to the E at 8 mph 13 km/h.

Thursday, September 24, 2026

Mid-Morning
Long Valley Weather - 2026-09-24 - Morning - Sunny
54°F 12°C
Sunny
Mid-Afternoon
Long Valley Weather - 2026-09-24 - Afternoon - Partly Cloudy
77°F 25°C
Partly Cloudy
Early-Evening
Long Valley Weather - 2026-09-24 - Evening - Sunny
82°F 28°C
Sunny
Enjoyable around 77°F 25°C, sunny in the morning, partly cloudy in the afternoon, and sunny this evening, with lower humidity and barometric pressure falling. Winds easing from SSE 22 mph 36 km/h to SSW 10 mph 16 km/h.

Friday, September 25, 2026

Mid-Morning
Long Valley Weather - 2026-09-25 - Morning - Partly Cloudy
60°F 15°C
Partly Cloudy
Mid-Afternoon
Long Valley Weather - 2026-09-25 - Afternoon - Partly Cloudy
56°F 13°C
Partly Cloudy
Early-Evening
Long Valley Weather - 2026-09-25 - Evening - Sunny
51°F 10°C
Sunny
Cool and brisk at 56°F 13°C, partly cloudy in the morning, becoming cloudy through the afternoon and evening, with increasing humidity and barometric pressure rising. Winds tapering down from NNW 21 mph 34 km/h to NE 12 mph 19 km/h.

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Weather by the Numbers

Sat, 12th
Long Valley SD Weather - Saturday, Sep 12, 2026 - Sunny
Hi: 71°F 21°C
Lo: 50°F 10°C
Sunrise 06:21 AM
Sunset 07:01 PM
Wind N 4 mph7 km/h
Dew Point 42°F5°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 45%
Sun, 13th
Long Valley SD Weather - Sunday, Sep 13, 2026 - Partly Cloudy
Hi: 79°F 26°C
Lo: 52°F 11°C
Sunrise 06:23 AM
Sunset 06:59 PM
Wind ESE 17 mph27 km/h
Dew Point 36°F2°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 2% *
Humidity 32%
Mon, 14th
Long Valley SD Weather - Monday, Sep 14, 2026 - Overcast
Hi: 78°F 25°C
Lo: 57°F 14°C
Sunrise 06:24 AM
Sunset 06:57 PM
Wind NW 22 mph35 km/h
Dew Point 45°F7°C
uv Index 6
Barometric Pressure 29.65 in1004 mb
POP 10% *
Humidity 38%
Tue, 15th
Long Valley SD Weather - Tuesday, Sep 15, 2026 - Cloudy
Hi: 76°F 25°C
Lo: 50°F 10°C
Sunrise 06:25 AM
Sunset 06:55 PM
Wind ENE 5 mph8 km/h
Dew Point 33°F0°C
uv Index 6
Barometric Pressure 30.12 in1020 mb
POP 8% *
Humidity 36%
Wed, 16th
Long Valley SD Weather - Wednesday, Sep 16, 2026 - Patchy Rain Nearby
Hi: 65°F 18°C
Lo: 51°F 11°C
Sunrise 06:26 AM
Sunset 06:53 PM
Wind SSE 13 mph21 km/h
Dew Point 50°F10°C
uv Index 3
Barometric Pressure 30.12 in1020 mb
POP 17% *
Humidity 73%
Thu, 17th
Long Valley SD Weather - Thursday, Sep 17, 2026 - Partly Cloudy
Hi: 74°F 23°C
Lo: 50°F 10°C
Sunrise 06:27 AM
Sunset 06:52 PM
Wind SE 9 mph14 km/h
Dew Point 52°F11°C
uv Index 5
Barometric Pressure 30.18 in1022 mb
POP 5% *
Humidity 62%
Fri, 18th
Long Valley SD Weather - Friday, Sep 18, 2026 - Moderate Or Heavy Rain Shower
Hi: 59°F 15°C
Lo: 54°F 12°C
Sunrise 06:28 AM
Sunset 06:50 PM
Wind ENE 11 mph17 km/h
Dew Point 55°F13°C
uv Index 3
Barometric Pressure 30.03 in1017 mb
POP 87% *
Humidity 97%
Sat, 19th
Long Valley SD Weather - Saturday, Sep 19, 2026 - Sunny
Hi: 71°F 22°C
Lo: 52°F 11°C
Sunrise 06:29 AM
Sunset 06:48 PM
Wind NNE 5 mph9 km/h
Dew Point 48°F9°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 3% *
Humidity 58%
Sun, 20th
Long Valley SD Weather - Sunday, Sep 20, 2026 - Sunny
Hi: 71°F 22°C
Lo: 61°F 16°C
Sunrise 06:30 AM
Sunset 06:46 PM
Wind S 17 mph27 km/h
Dew Point 42°F5°C
uv Index 5
Barometric Pressure 30.06 in1018 mb
POP 1% *
Humidity 39%
Mon, 21st
Long Valley SD Weather - Monday, Sep 21, 2026 - Partly Cloudy
Hi: 73°F 23°C
Lo: 59°F 15°C
Sunrise 06:32 AM
Sunset 06:44 PM
Wind S 20 mph33 km/h
Dew Point 44°F7°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 3% *
Humidity 41%
Tue, 22nd
Long Valley SD Weather - Tuesday, Sep 22, 2026 - Partly Cloudy
Hi: 79°F 26°C
Lo: 60°F 16°C
Sunrise 06:33 AM
Sunset 06:42 PM
Wind S 14 mph22 km/h
Dew Point 45°F7°C
uv Index 6
Barometric Pressure 29.85 in1011 mb
POP 4% *
Humidity 41%
Wed, 23rd
Long Valley SD Weather - Wednesday, Sep 23, 2026 - Sunny
Hi: 70°F 21°C
Lo: 55°F 13°C
Sunrise 06:34 AM
Sunset 06:41 PM
Wind NE 11 mph18 km/h
Dew Point 30°F-1°C
uv Index 5
Barometric Pressure 30.15 in1021 mb
POP 1% *
Humidity 30%
Thu, 24th
Long Valley SD Weather - Thursday, Sep 24, 2026 - Overcast
Hi: 86°F 30°C
Lo: 54°F 12°C
Sunrise 06:35 AM
Sunset 06:39 PM
Wind S 19 mph31 km/h
Dew Point 40°F4°C
uv Index 4
Barometric Pressure 29.83 in1010 mb
POP 8% *
Humidity 38%
Fri, 25th
Long Valley SD Weather - Friday, Sep 25, 2026 - Cloudy
Hi: 75°F 24°C
Lo: 46°F 8°C
Sunrise 06:36 AM
Sunset 06:37 PM
Wind N 22 mph36 km/h
Dew Point 32°F-0°C
uv Index 3
Barometric Pressure 30.12 in1020 mb
POP 7% *
Humidity 39%
* POP = Probability of Precipitation. Data for 12:00 PM.