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Spearfish SD Weather - Clear - 55°F
Clear
55°F
Updated 8:39 am
Feels Like 55°F
Humidity 66%
Wind N 0 mph
Barometer  30.11 in
Dew Point 44°F
Spearfish SD Weather - Clear - 13°C
Clear
13°C
Updated 8:39 am
Feels Like 13°C
Humidity 66%
Wind N 0 km/h
Barometer  101.9 kPa
Dew Point 7°C
Spearfish, SD Weather and Current Conditionsspearfish sd weather forecast

Spearfish, SD Weather Forecast

Spearfish South Dakota WeatherSpearfish, South Dakota Weather Weather Forecast
14 day API forecast for Spearfish, South Dakota. Note. The 7-day weather forecast for Spearfish, 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.
Spearfish, SD Weather Forecast Dated: 839 AM Wed Sep 16 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.

Wednesday, September 16, 2026

Mid-Morning
Spearfish Weather - 2026-09-16 - Morning - Overcast
63°F 17°C
Overcast
Mid-Afternoon
Spearfish Weather - 2026-09-16 - Afternoon - Cloudy
78°F 25°C
Cloudy
Early-Evening
Spearfish Weather - 2026-09-16 - Evening - Cloudy
69°F 21°C
Cloudy
Pleasant near 78°F 25°C, overcast in the morning, cloudy in the afternoon, and overcast this evening, with steady humidity and steady pressure. Winds turning from the ENE to the SSW at 6 mph 9 km/h.

Thursday, September 17, 2026

Mid-Morning
Spearfish Weather - 2026-09-17 - Morning - Scattered Showers
66°F 19°C
Scattered Showers
Mid-Afternoon
Spearfish Weather - 2026-09-17 - Afternoon - Scattered Showers
72°F 22°C
Scattered Showers
Early-Evening
Spearfish Weather - 2026-09-17 - Evening - Light Showers
65°F 18°C
Light Showers
Comfortable with temperatures reaching 72°F 22°C, scattered downpours possible, with increasing humidity and barometric pressure falling. Winds switching from the E to the SE at 4 mph 7 km/h.

Friday, September 18, 2026

Mid-Morning
Spearfish Weather - 2026-09-18 - Morning - Overcast
64°F 18°C
Overcast
Mid-Afternoon
Spearfish Weather - 2026-09-18 - Afternoon - Scattered Showers
67°F 19°C
Scattered Showers
Early-Evening
Spearfish Weather - 2026-09-18 - Evening - Partly Cloudy
61°F 16°C
Partly Cloudy
Comfortable at 67°F 19°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds moving from the WNW to the ESE at 5 mph 9 km/h.

Saturday, September 19, 2026

Mid-Morning
Spearfish Weather - 2026-09-19 - Morning - Light Showers
58°F 14°C
Light Showers
Mid-Afternoon
Spearfish Weather - 2026-09-19 - Afternoon - Light Showers
61°F 16°C
Light Showers
Early-Evening
Spearfish Weather - 2026-09-19 - Evening - Light Showers
56°F 13°C
Light Showers
Cool with a high near 61°F 16°C, rounds of showers expected off and on all day, with steady humidity and steady pressure. Winds out of the E at 10 mph 16 km/h.

Sunday, September 20, 2026

Mid-Morning
Spearfish Weather - 2026-09-20 - Morning - Light Showers
54°F 12°C
Light Showers
Mid-Afternoon
Spearfish Weather - 2026-09-20 - Afternoon - Scattered Showers
54°F 12°C
Scattered Showers
Early-Evening
Spearfish Weather - 2026-09-20 - Evening - Scattered Showers
50°F 10°C
Scattered Showers
Brisk around 54°F 12°C, scattered downpours possible, with steady humidity and steady pressure. Winds shifting from the E to the ESE at 7 mph 11 km/h.

Monday, September 21, 2026

Mid-Morning
Spearfish Weather - 2026-09-21 - Morning - Overcast
55°F 13°C
Overcast
Mid-Afternoon
Spearfish Weather - 2026-09-21 - Afternoon - Sunny
65°F 19°C
Sunny
Early-Evening
Spearfish Weather - 2026-09-21 - Evening - Sunny
58°F 14°C
Sunny
Mildly cool near 65°F 19°C, overcast in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and barometric pressure falling. Winds increasing from the NE at 1 mph 2 km/h to SE at 10 mph 15 km/h.

Tuesday, September 22, 2026

Mid-Morning
Spearfish Weather - 2026-09-22 - Morning - Overcast
59°F 15°C
Overcast
Mid-Afternoon
Spearfish Weather - 2026-09-22 - Afternoon - Partly Cloudy
78°F 25°C
Partly Cloudy
Early-Evening
Spearfish Weather - 2026-09-22 - Evening - Nearby Thunderstorms
68°F 20°C
Nearby Thunderstorms
Comfortable with temperatures reaching 78°F 25°C, periods of heavy thunderstorms, with steady humidity and steady pressure. Winds switching from the ENE to the SE at 8 mph 13 km/h.

Wednesday, September 23, 2026

Mid-Morning
Spearfish Weather - 2026-09-23 - Morning - Sunny
49°F 9°C
Sunny
Mid-Afternoon
Spearfish Weather - 2026-09-23 - Afternoon - Sunny
61°F 16°C
Sunny
Early-Evening
Spearfish Weather - 2026-09-23 - Evening - Sunny
53°F 12°C
Sunny
Cool with a high near 61°F 16°C, partly cloudy in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure. Winds tapering down from WNW 22 mph 36 km/h to SW 10 mph 16 km/h.

Thursday, September 24, 2026

Mid-Morning
Spearfish Weather - 2026-09-24 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
Spearfish Weather - 2026-09-24 - Afternoon - Sunny
78°F 25°C
Sunny
Early-Evening
Spearfish Weather - 2026-09-24 - Evening - Sunny
67°F 20°C
Sunny
Mild temperatures up to 78°F 25°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds swinging from the ESE to the S at 9 mph 14 km/h.

Friday, September 25, 2026

Mid-Morning
Spearfish Weather - 2026-09-25 - Morning - Sunny
78°F 25°C
Sunny
Mid-Afternoon
Spearfish Weather - 2026-09-25 - Afternoon - Sunny
91°F 33°C
Sunny
Early-Evening
Spearfish Weather - 2026-09-25 - Evening - Overcast
77°F 25°C
Overcast
Very hot with a high of 91°F 33°C, sunny through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling. Winds picking up from SSE at 3 mph 5 km/h to S at 11 mph 17 km/h.

Saturday, September 26, 2026

Mid-Morning
Spearfish Weather - 2026-09-26 - Morning - Overcast
78°F 26°C
Overcast
Mid-Afternoon
Spearfish Weather - 2026-09-26 - Afternoon - Overcast
83°F 28°C
Overcast
Early-Evening
Spearfish Weather - 2026-09-26 - Evening - Cloudy
78°F 26°C
Cloudy
Warm and summery near 83°F 28°C, overcast throughout the day, with steady humidity and steady pressure. Winds blowing from the WSW at 15 mph 24 km/h.

Sunday, September 27, 2026

Mid-Morning
Spearfish Weather - 2026-09-27 - Morning - Sunny
67°F 20°C
Sunny
Mid-Afternoon
Spearfish Weather - 2026-09-27 - Afternoon - Overcast
85°F 29°C
Overcast
Early-Evening
Spearfish Weather - 2026-09-27 - Evening - Cloudy
73°F 23°C
Cloudy
Balmy with temperatures reaching 85°F 29°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds increasing from the ESE at 1 mph 2 km/h to S at 9 mph 14 km/h.

Monday, September 28, 2026

Mid-Morning
Spearfish Weather - 2026-09-28 - Morning - Partly Cloudy
57°F 14°C
Partly Cloudy
Mid-Afternoon
Spearfish Weather - 2026-09-28 - Afternoon - Scattered Showers
39°F 4°C
Scattered Showers
Early-Evening
Spearfish Weather - 2026-09-28 - Evening - Overcast
38°F 4°C
Overcast
Nippy around 39°F 4°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure rising. Winds picking up from W at 17 mph 27 km/h to WNW at 27 mph 42 km/h. Gusts up to 43 mph 70 km/h.

Tuesday, September 29, 2026

Mid-Morning
Spearfish Weather - 2026-09-29 - Morning - Sunny
48°F 9°C
Sunny
Mid-Afternoon
Spearfish Weather - 2026-09-29 - Afternoon - Sunny
62°F 17°C
Sunny
Early-Evening
Spearfish Weather - 2026-09-29 - Evening - Cloudy
52°F 11°C
Cloudy
Mildly cool near 62°F 17°C, sunny through the afternoon, turning overcast this evening, with steady humidity and barometric pressure falling. Winds swinging from the WNW to the SSE at 10 mph 16 km/h.

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Weather by the Numbers

Wed, 16th
Spearfish SD Weather - Wednesday, Sep 16, 2026 - Overcast
Hi: 78°F 25°C
Lo: 53°F 12°C
Sunrise 06:36 AM
Sunset 07:04 PM
Wind N 8 mph13 km/h
Dew Point 41°F5°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 9% *
Humidity 31%
Thu, 17th
Spearfish SD Weather - Thursday, Sep 17, 2026 - Patchy Rain Nearby
Hi: 76°F 25°C
Lo: 58°F 14°C
Sunrise 06:37 AM
Sunset 07:02 PM
Wind ESE 15 mph24 km/h
Dew Point 53°F11°C
uv Index 2
Barometric Pressure 30.06 in1018 mb
POP 17% *
Humidity 49%
Fri, 18th
Spearfish SD Weather - Friday, Sep 18, 2026 - Mist
Hi: 67°F 19°C
Lo: 56°F 13°C
Sunrise 06:38 AM
Sunset 07:00 PM
Wind NNW 7 mph12 km/h
Dew Point 59°F15°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 40% *
Humidity 95%
Sat, 19th
Spearfish SD Weather - Saturday, Sep 19, 2026 - Light Rain Shower
Hi: 61°F 16°C
Lo: 54°F 12°C
Sunrise 06:39 AM
Sunset 06:58 PM
Wind E 9 mph14 km/h
Dew Point 56°F13°C
uv Index 2
Barometric Pressure 29.97 in1015 mb
POP 70% *
Humidity 86%
Sun, 20th
Spearfish SD Weather - Sunday, Sep 20, 2026 - Mist
Hi: 54°F 12°C
Lo: 49°F 9°C
Sunrise 06:40 AM
Sunset 06:56 PM
Wind E 7 mph12 km/h
Dew Point 53°F11°C
uv Index 3
Barometric Pressure 30.06 in1018 mb
POP 50% *
Humidity 94%
Mon, 21st
Spearfish SD Weather - Monday, Sep 21, 2026 - Partly Cloudy
Hi: 65°F 19°C
Lo: 47°F 8°C
Sunrise 06:41 AM
Sunset 06:54 PM
Wind ENE 6 mph10 km/h
Dew Point 51°F10°C
uv Index 4
Barometric Pressure 30 in1016 mb
POP 14% *
Humidity 76%
Tue, 22nd
Spearfish SD Weather - Tuesday, Sep 22, 2026 - Overcast
Hi: 78°F 25°C
Lo: 51°F 11°C
Sunrise 06:43 AM
Sunset 06:53 PM
Wind NE 7 mph12 km/h
Dew Point 45°F7°C
uv Index 5
Barometric Pressure 29.8 in1009 mb
POP 10% *
Humidity 36%
Wed, 23rd
Spearfish SD Weather - Wednesday, Sep 23, 2026 - Cloudy
Hi: 61°F 16°C
Lo: 47°F 9°C
Sunrise 06:44 AM
Sunset 06:51 PM
Wind NW 22 mph35 km/h
Dew Point 34°F1°C
uv Index 3
Barometric Pressure 30.18 in1022 mb
POP 6% *
Humidity 42%
Thu, 24th
Spearfish SD Weather - Thursday, Sep 24, 2026 - Sunny
Hi: 78°F 25°C
Lo: 47°F 8°C
Sunrise 06:45 AM
Sunset 06:49 PM
Wind NE 6 mph10 km/h
Dew Point 29°F-1°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 0% *
Humidity 20%
Fri, 25th
Spearfish SD Weather - Friday, Sep 25, 2026 - Sunny
Hi: 91°F 33°C
Lo: 63°F 17°C
Sunrise 06:46 AM
Sunset 06:47 PM
Wind E 10 mph17 km/h
Dew Point 26°F-3°C
uv Index 8
Barometric Pressure 29.77 in1008 mb
POP 0% *
Humidity 10%
Sat, 26th
Spearfish SD Weather - Saturday, Sep 26, 2026 - Overcast
Hi: 83°F 28°C
Lo: 72°F 22°C
Sunrise 06:47 AM
Sunset 06:45 PM
Wind SW 19 mph31 km/h
Dew Point 44°F7°C
uv Index 6
Barometric Pressure 29.53 in1000 mb
POP 9% *
Humidity 28%
Sun, 27th
Spearfish SD Weather - Sunday, Sep 27, 2026 - Sunny
Hi: 85°F 29°C
Lo: 57°F 14°C
Sunrise 06:49 AM
Sunset 06:43 PM
Wind NNE 2 mph3 km/h
Dew Point 40°F4°C
uv Index 7
Barometric Pressure 29.65 in1004 mb
POP 0% *
Humidity 25%
Mon, 28th
Spearfish SD Weather - Monday, Sep 28, 2026 - Overcast
Hi: 65°F 18°C
Lo: 37°F 3°C
Sunrise 06:50 AM
Sunset 06:41 PM
Wind W 25 mph40 km/h
Dew Point 38°F3°C
uv Index 2
Barometric Pressure 29.85 in1011 mb
POP 18% *
Humidity 70%
Tue, 29th
Spearfish SD Weather - Tuesday, Sep 29, 2026 - Sunny
Hi: 62°F 17°C
Lo: 37°F 3°C
Sunrise 06:51 AM
Sunset 06:39 PM
Wind NNW 8 mph13 km/h
Dew Point 28°F-2°C
uv Index 4
Barometric Pressure 30.15 in1021 mb
POP 1% *
Humidity 32%
* POP = Probability of Precipitation. Data for 12:00 PM.