Spearfish, South Dakota Weather Conditions

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Current Conditions

  • 86°
  • Clear
  • Wind: SE 7 mph
  • Humidity: 48%
  • Visibility: 10.0 miles
  • Dew Point: 64°
  • Pressure: 29.98 in. +
  • Heat Index: 87

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Next 12 Hours

6  pm
9  pm
12  am
3  am
6  am
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
87°
74°
76°
76°
74°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Clear
  • High: 95 °
  • Low: 58 °
  • Clear
  • Monday
  • Clear
  • High: 79 °
  • Low: 62 °
  • Clear
  • Tuesday
  • Clear
  • High: 89 °
  • Low: 68 °
  • Clear
  • Wednesday
  • Clear
  • High: 91 °
  • Low: 67 °
  • Clear
  • Thursday
  • Clear
  • High: 87 °
  • Low: 59 °
  • Clear

Forecast for Spearfish, South Dakota

Updated: 2:41 PM MDT on August 29, 2015

  • Tonight

    Mostly clear. Lows in the mid 60s. South winds 10 to 15 mph.

  • Sunday

    Mostly sunny in the morning...then partly cloudy with a 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Southwest winds 10 to 15 mph.

  • Sunday Night

    Breezy. Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows around 60. Southwest winds 5 to 10 mph with gusts to around 20 mph increasing to northwest 15 to 25 mph with gusts to around 35 mph after midnight.

  • Monday

    Mostly sunny. Highs in the upper 70s. Northwest winds 10 to 15 mph. Gusts up to 25 mph in the morning.

  • Monday Night

    Mostly clear. Lows in the upper 50s. Southeast winds 5 to 10 mph.

  • Tuesday

    Mostly sunny. Highs in the upper 80s.

  • Tuesday Night

    Mostly clear. Lows in the lower 60s.

  • Wednesday

    Mostly sunny. Highs around 90.

  • Wednesday Night

    Mostly clear. Lows in the lower 60s.

  • Thursday

    Mostly sunny. Highs in the upper 80s.

  • Thursday Night

    Mostly clear. Lows in the upper 50s.

  • Friday

    Partly cloudy. Highs in the lower 80s.

  • Friday Night

    Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the lower 50s.

  • Saturday

    Partly cloudy with a 30 percent chance of showers and thunderstorms. Highs in the upper 70s.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: TMWC, Spearfish, SD

Updated: 5:28 PM MDT

Temperature: 88.0 °F Dew Point: 54 °F Humidity: 32% Wind: SSW at 3.5 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 86 °F Graphs

Location: Maitland Road, Spearfish, SD

Updated: 5:20 PM MDT

Temperature: 88.0 °F Dew Point: 57 °F Humidity: 34% Wind: North at - Pressure: 30.12 in Hourly Precipitation: - Heat Index: 86 °F Graphs

Location: Gigear Road, Sturgis, SD

Updated: 5:20 PM MDT

Temperature: 89.4 °F Dew Point: 60 °F Humidity: 37% Wind: North at - Pressure: 30.06 in Hourly Precipitation: - Heat Index: 89 °F Graphs

Location: NonFedAWOS, Belle Fourche, SD

Updated: 4:55 PM MDT

Temperature: 93 °F Dew Point: 54 °F Humidity: 26% Wind: East at 10 mph Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 91 °F Graphs

Location: NonFedAWOS, Sturgis, SD

Updated: 4:55 PM MDT

Temperature: 91 °F Dew Point: 57 °F Humidity: 32% Wind: ESE at 12 mph Pressure: 29.93 in Hourly Precipitation: 0.00 in Heat Index: 90 °F Graphs

Location: APRSWXNET, Savoy, SD

Updated: 5:00 PM MDT

Temperature: 83 °F Dew Point: 50 °F Humidity: 32% Wind: Calm Pressure: 30.08 in Hourly Precipitation: 0.00 in Heat Index: 81 °F Graphs

Location: Dumont Trailhead, Lead, SD

Updated: 5:25 PM MDT

Temperature: 81.0 °F Dew Point: 38 °F Humidity: 22% Wind: SSE at 7.0 mph Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: 79 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion for western South Dakota and northeastern Wyoming 
National Weather Service Rapid City South Dakota 
516 PM MDT Sat Aug 29 2015 


Short term...this evening through Sunday night 
issued at 258 PM MDT Sat Aug 29 2015 


Current surface analysis shows low pressure over sk...with a cold 
front trailing southwestward into northwest Montana and northern Idaho. A 
surface trough extends southward across eastern Montana into northeast 
Wyoming. Upper level analysis shows ridging over The Rockies and into 
the High Plains. Flow aloft has become westerly over the area and 
will become southwesterly into tonight. Temperatures are in the 90s 
across the plains...with 80s in the Black Hills. Winds are south 
to southwest...breezy across portions of northeast Wyoming. Hazy 
sunshine continues through the smoke...though conditions appear to 
be gradually improving in most areas this afternoon. 


As ridge builds over and east of the area through the weekend...hot 
conditions can be expected. The cold front to the northwest of the 
region will eventually make it into the forecast area late Sunday 
and Sunday night...bringing mostly isolated showers and 
thunderstorms...along with cooler and breezy conditions behind it 
into Monday. 


For tonight...skies will stay mainly clear with lows mostly in the 
60s to around 70 degrees. Low level southerly jet will intensify 
over the area overnight...with breezy conditions at times in the 
usual areas from northeast Wyoming through southwest into south central 
South Dakota. Atmosphere looks too dry to get any showers to develop with the 
jet. 


Sunday will see mostly sunny to partly cloudy skies with highs in 
the 90s to around 100 degrees on the plains as the thermal ridge 
moves across western into central South Dakota during the day. Exact timing of 
the cold front is still a bit uncertain...but it should move into 
northeast Wyoming late in the day and across the rest of the forecast 
area Sunday night. Winds will switch to the west-northwest and 
become breezy to windy across northwest into west central South Dakota 
overnight. Embedded energy in southwest flow aloft will combine with 
the front to produce at least isolated showers and storms over a 
good portion of the County Warning Area Sunday night. The threat for strong to 
severe storms is minimal with the timing of the front...though winds 
could get gusty with some of the showers behind the front. 


Long term...Monday through Saturday 
issued at 258 PM MDT Sat Aug 29 2015 


Negative height anomaly over the Pacific northwest will remain nearly 
stationary through the period...with generally warm conds over the 
northern plains as upper level SW flow persists. The western noam 
upper trough will gradually shift east as a stronger northern 
stream impulse merges with it...leading toward breakdown of the 
persistent ridge. In the meantime...above normal temperatures will 
persist through most of the period...with mainly dry conds. Weak 
cold front will advect through the area Monday morning... 
supporting cooler but still seasonal temperatures in a cold air advection regime Monday. 
Central noam ridge will re-surge Tue-thur...with very warm conds 
expected once again as southerly flow spreads over the region. 
Weak SW flow impulses could support a few isolated rain showers/ts in the 
Tuesday-Wednesday period...especially with any concentrated positive Theta-E advection. 
However...lack of any appreciable signals preclude any pop 
mention. Northwest Pacific upper trough will bias east by the end of the week 
with cooler weather looking more likely with increasing chances 
for rain. 


&& 


Aviation...(for the 00z tafs through 00z Sunday evening) 
issued at 515 PM MDT Sat Aug 29 2015 


VFR conditions will prevail through Sunday afternoon. Low level 
wind shear is expected on the South Dakota plains later this evening through 
Sunday morning as a low level jet from 30-40kts develops. 


&& 


Fire weather... 
issued at 258 PM MDT Sat Aug 29 2015 


Warm and dry conds will persist across NE Wyoming. Relative humidity 
across portions of the northeast Wyoming plains will drop to 15 
percent or below this afternoon and again Sunday afternoon. Gusty 
southwest winds will continue through Sunday...and are expected to 
be strongest Sunday afternoon ahead of a cold front. SW winds of 
20 to 30 miles per hour with gusts to around 35 miles per hour are expected sun. 
Partially mixed conds can be expected tonight given pressure 
falls...with SW winds continuing under poor relative humidity recovery. Went 
ahead and extended the red flag warning through Sunday afternoon 
for this. 


&& 


Unr watches/warnings/advisories... 
South Dakota...none. 
Wyoming...red flag warning until 8 PM MDT Sunday for wyz259-297-298. 


&& 


$$ 


Short term...26 
long term...jc 
aviation...helgeson 
fire weather...jc 



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