Spearfish, South Dakota Weather Conditions

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Current Conditions

  • 46°
  • Clear
  • Wind: Calm
  • Humidity: 66%
  • Visibility: 10.0 miles
  • Dew Point: 36°
  • Pressure: 30.35 in. +

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Next 12 Hours

4  am
7  am
10  am
1  pm
4  pm
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
Clear
45°
43°
57°
68°
70°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Clear
  • High: 70 °
  • Low: 48 °
  • Clear
  • Monday
  • Chance of a Thunderstorm
  • High: 75 °
  • Low: 48 °
  • Chance of T-Storms
  • Tuesday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 54 °
  • Chance of a Thunderstorm
  • Wednesday
  • Clear
  • High: 81 °
  • Low: 57 °
  • Clear
  • Thursday
  • Clear
  • High: 90 °
  • Low: 54 °
  • Clear

Forecast for Spearfish, South Dakota

Updated: 10:00 PM CDT on September 20, 2014

  • Sunday

    Clear. High of 70F. Winds less than 5 mph.

  • Sunday Night

    Clear in the evening, then partly cloudy. Low of 48F. Winds from the SSE at 5 to 10 mph.

  • Monday

    Mostly cloudy with a chance of a thunderstorm and a chance of rain. High of 75F. Winds from the SSE at 5 to 10 mph. Chance of rain 30%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm and a chance of rain. Low of 48F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm and a chance of rain. High of 77F. Winds from the SSW at 5 to 10 mph. Chance of rain 20%.

  • Tuesday Night

    Clear. Low of 54F. Winds from the North at 5 to 10 mph shifting to the West after midnight.

  • Wednesday

    Clear. High of 81F. Winds from the South at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 57F. Winds from the SSE at 10 to 15 mph.

  • Thursday

    Clear. High of 90F. Winds from the SSE at 10 to 15 mph.

  • Thursday Night

    Clear. Low of 54F. Winds from the SSE at 10 to 15 mph.

  • Friday

    Clear. High of 84F. Breezy. Winds from the South at 15 to 20 mph.

  • Friday Night

    Clear. Low of 55F. Breezy. Winds from the South at 10 to 20 mph.

  • Saturday

    Mostly cloudy with a chance of a thunderstorm. High of 75F. Winds from the SSE at 5 to 15 mph. Chance of rain 50%.

  • Saturday Night

    Overcast with a chance of a thunderstorm. Low of 50F. Winds from the South at 5 to 10 mph. Chance of rain 70% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Mostly cloudy with a chance of a thunderstorm. High of 64F. Winds from the NW at 10 to 15 mph. Chance of rain 30%.

  • Sunday Night

    Overcast with a chance of a thunderstorm. Fog overnight. Low of 45F. Winds from the NW at 5 to 15 mph. Chance of rain 50%.

  • Monday

    Partly cloudy. High of 63F. Winds less than 5 mph.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Low of 55F. Winds less than 5 mph. Chance of rain 40%.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm. High of 68F. Winds from the SSE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy. Low of 52F. Winds from the WSW at 5 to 10 mph.

  • Wednesday

    Clear. High of 64F. Winds from the WNW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 52F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: TMWC, Spearfish, SD

Updated: 4:06 AM MDT

Temperature: 52.3 °F Dew Point: 34 °F Humidity: 49% Wind: SSW at 6.9 mph Pressure: 30.24 in Hourly Precipitation: 0.00 in Windchill: - Graphs

Location: Spearfish, SD

Updated: 4:04 AM MDT

Temperature: 47.3 °F Dew Point: 37 °F Humidity: 68% Wind: Calm Pressure: 29.76 in Hourly Precipitation: 0.00 in Windchill: 47 °F Graphs

Location: County Road 172, Sundance, WY

Updated: 3:52 AM MDT

Temperature: 41.7 °F Dew Point: 36 °F Humidity: 79% Wind: West at 1.0 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Windchill: 42 °F Graphs

Location: HADS ANNIE CREEK NEAR LEAD 6SW SD US USGS, Lead, SD

Updated: 3:30 AM MDT

Temperature: 34 °F Dew Point: - Humidity: - Wind: Calm Pressure: - Hourly Precipitation: 0.00 in Windchill: 34 °F Graphs

Location: Dumont Trailhead, Lead, SD

Updated: 4:03 AM MDT

Temperature: 32.6 °F Dew Point: 31 °F Humidity: 95% Wind: Calm Pressure: 30.30 in Hourly Precipitation: 0.00 in Windchill: 33 °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 
206 am MDT sun Sep 21 2014 


Short term...today through Monday night 
issued at 205 am MDT sun Sep 21 2014 


Surface ridge will shift southeast of the region today as the SW 
Continental U.S. Upper low ejects toward the northern plains. Ll warm air advection will 
support an eastward shift of the western noam ridge as southerly 
return flow revs up. Deep moisture plume associated with the 
ejecting low will advect into the region later tonight...with positive 
Theta-E advection prevailing through Monday. Increasing moisture and lsa 
will support isolated to scattered showers and thunderstorms across much of 
the area Monday...especially the southeast forecast area as the SW Continental U.S. Upper low ejects NE 
across the area with an associated Theta-E ridge. 


Today...dry and sunny weather on tap as upper level ridging 
continues across the northern plains. Seasonal temperatures all places with 
highs in the 70s under generally light winds. Ll pressure falls will 
continue through tonight with deep layer positive Theta-E advection per the 
advancing SW Continental U.S. Upper trough and associated moisture plume. Gusty 
winds expected across NE Wyoming and possibly the northern bh foothills 
overnight given magnitude of pressure falls. Lack of appreciable 
forcing for ascent with relatively stable profiles per elevated 
convection precludes any pop mention tonight. Have opted dry all 
places. 


Monday...deep layer moisture plume will shift NE over the forecast area with 
diurnal heating supporting destabilization. However...expected middle 
level cloud cover may hamper this process...leaving some doubt to 
the degree of instability outside NE Wyoming. Increasing lsa per the 
advancing impulse will support increasing chances for rain showers/ts most 
places. However...lack of appreciable instability with the bulk of 
forcing shifting toward scentral South Dakota supports mostly low chance to 
slight chance probability of precipitation across most of the forecast area through Monday night...save 
for scentral South Dakota where overlap of stronger dynamic forcing/deep 
moisture will be found. Any activity over the northwest half of the forecast area is 
expected to mainly diurnally forced and more of a widely scattered to 
isolated nature. Did raise probability of precipitation over scentral South Dakota to high chance and 
likelies...especially toward Tripp County. Convective activity will have 
plenty of moisture to work with...with forecast models supporting 
well over an inch of precipitable water. Hence localized heavy rain is 
possible...especially over scentral South Dakota. Otherwise...mainly seasonal 
conditions will continue with highs in the 70s and lows in the 50s. 


&& 


Long term...Tuesday through Saturday 
issued at 205 am MDT sun Sep 21 2014 


Showers and thunderstorms will continue into 
Tuesday...and then diminish in the evening as the low moves east. 
Drier air will return Wednesday as a ridge builds...and highs will 
be above average for the second half of the workweek. The ecm and 
GFS continue to show a secondary upper low developing and 
retrograding back over the northern plains. The GFS keeps this low 
farther south...while the ecm has it lingering over western South Dakota 
before it gets pushed back into the main flow. Also the GFS is 
quicker than the ecm with bringing eastward the broad trough over 
the western Continental U.S.. decided to introduce some slight chance probability of precipitation for 
next weekend. 


&& 


Aviation...for the 12z tafs through 12z Monday morning 
issued at 205 am MDT sun Sep 21 2014 


Besides some breezy southeast winds across northeast 
Wyoming...winds will be generally light. VFR conditions are expected 
through Sunday night. 


&& 


Unr watches/warnings/advisories... 
South Dakota...none. 
Wyoming...none. 
&& 


$$ 


Short term...jc 
long term...pojorlie 
aviation...pojorlie 



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