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Spearfish, SD 57799 Weather
Current conditions
Observed at Spearfish / Clyde Ice · 45 min ago
Forecast
10-day-
Overnight
Partly cloudy. Low around 55, with temperatures rising to around 58 overnight. Southwest wind 5 to 8 mph, with gusts as high as 18 mph.
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Thursday
Mostly sunny. High near 77, with temperatures falling to around 73 in the afternoon. East wind around 5 mph.
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Thursday Night
Mostly cloudy. Low around 59, with temperatures rising to around 61 overnight. South wind 3 to 8 mph.
National Weather Service forecast updated 2 hrs ago.
Hourly
Hourly forecast- Now61°
- 4 AM59°
- 5 AM58°
- 6 AM56°
- 7 AM55°
- 8 AM57°
- 9 AM62°
- 10 AM67°
- 11 AM71°
- 12 PM74°
- 1 PM76°
- 2 PM77°
- 3 PM77°
- 4 PM76°
- 5 PM73°
- 6 PM69°
- 7 PM65°
- 8 PM63°
- 9 PM62°
- 10 PM62°
- 11 PM62°
- Fri12 AM63°
- 1 AM63°
- 2 AM63°
10-day forecast
Details- TonightOct 21Partly Cloudy55°
- TodayOct 22Mostly Sunny59°77°
- FriOct 23Mostly Sunny36°78°
- SatOct 24Mostly Sunny13%34°45°
- SunOct 25Chance Light Snow then Chance Rain And Snow43%33°46°
- MonOct 26Partly Sunny17%32°44°
- TueOct 27Mostly Sunny12%38°53°
- WedOct 28Mostly Sunny54°
- ThuOct 29Sunny34°53°
- FriOct 30Partly cloudy32°53°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Spearfish
More weather news-
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Rapid City, SD reporting area · 2 hrs ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlySpearfish, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Sturgis 30 km
- Belle Fourche 20 km
- Lead 18 km
- Blackhawk 59 km
- North Spearfish 2 km
- Summerset 54 km
Forecasters' discussion
From the National Weather Service office in UNR, issued 15 hrs ago
Key Messages
- Warm and dry weather through much of this week.
Update
Issued at 1058 PM MDT Tue Oct 20 2026
No major changes to the forecast this evening. Surface analysis shows a weak cold front crossing NW SD at this time. Across SW SD, temps are in the mid to upper 50s while over NW SD into portions of NE WY temps are dropping into the upper 40s. NW winds will continue overnight into Wed morning, then return flow sets up as the surface high pushes east of the CWA Wed afternoon. Max temps on Wed will be in the 60s to low 70s...but then a decent overnight LLJ/warm air advection will push highs on Thursday well above average (upper 70s to possibly mid 80s over the western SD plains).
Discussion
(This Evening Through Tuesday) Issued at 1254 PM MDT Tue Oct 20 2026
Current upper level analysis shows broad ridging over the central and western US with deepening trof off the west coast. The CWA sits under upper level southwest flow and clear skies. Sfc stations report light southerly winds across much of western SD with temperatures in the 60s to low 70s.
Weak front will cross the CWA overnight with the only impacts being a slight drop in tomorrow's highs and a brief period of breezy northwest winds overnight. Upper ridge builds over the region Wednesday into Thursday with southerly return flow supporting warming temps over the area.
Southerly winds pick up early Friday morning as upper level trof approaches with attendant sfc low and trailing cold front crossing the Northern Plains. WAA ahead of the front Friday afternoon will support highs in the upper 70s to low 80s over the western SD plains. As the front crosses the area later Friday evening, winds will shift to the northwest but remain breezy through the night, especially over northwestern SD. Much cooler conditions expected over the weekend with low chances for light precip.
Aviation
(For the 18Z TAFS Through 18Z Thursday) Issued At 1124 AM MDT Wed Oct 21 2026
VFR conditions are expected through the forecast period.
Main aviation changes will be centered around winds but overall concerns are low. Increased wind speeds, upwards of 10 to 20 kts, are likely through the tonight for NE WY and NW SD before a lull in speeds Thursday morning. Wind speeds increase again, up to 10 to 15 kts, for most of the area for Thursday afternoon.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.