Spearfish, South Dakota Weather Conditions

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Current Conditions

  • 18°
  • Clear
  • Wind: West 14 mph
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 7°
  • Pressure: 30.21 in. 0
  • Heat Index: 4

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Next 12 Hours

9  am
12  pm
3  pm
6  pm
9  pm
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Overcast
Overcast
Clear
Clear
Clear
Clear
14°
19°
23°
18°
14°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Sunday
  • Partly Cloudy
  • High: 25 °
  • Low: 14 °
  • Partly Cloudy
  • Monday
  • Chance of Snow
  • High: 36 °
  • Low: 3 °
  • Chance of Snow
  • Tuesday
  • Snow
  • High: 10 °
  • Low: -6 °
  • Snow
  • Wednesday
  • Partly Cloudy
  • High: 18 °
  • Low: 7 °
  • Partly Cloudy
  • Thursday
  • Clear
  • High: 46 °
  • Low: 27 °
  • Clear

Forecast for Spearfish, South Dakota

Updated: 9:00 AM CST on March 01, 2015

  • Sunday

    Partly cloudy in the morning, then overcast. High of 25F with a windchill as low as 1F. Winds from the WNW at 10 to 15 mph.

  • Sunday Night

    Clear. Low of 14F. Winds from the West at 5 to 10 mph shifting to the South after midnight.

  • Monday

    Overcast in the morning, then partly cloudy. High of 36F. Winds from the SW at 5 to 10 mph. Chance of snow 20%.

  • Monday Night

    Overcast with a chance of snow, then snow after midnight. Low of 3F with a windchill as low as -6F. Winds from the NNW at 5 to 20 mph. Chance of snow 80% with accumulations up to 1 in. possible.

  • Tuesday

    Overcast with snow, then a chance of snow in the afternoon. High of 10F with a windchill as low as -15F. Breezy. Winds from the NW at 15 to 20 mph with gusts to 30 mph. Chance of snow 70% with accumulations up to 1 in. possible.

  • Tuesday Night

    Partly cloudy. Low of -6F with a windchill as low as -22F. Breezy. Winds from the WNW at 15 to 20 mph.

  • Wednesday

    Partly cloudy. Fog early. High of 18F with a windchill as low as -29F. Breezy. Winds from the WNW at 15 to 25 mph.

  • Wednesday Night

    Clear. Low of 7F with a windchill as low as -6F. Winds from the SW at 10 to 15 mph.

  • Thursday

    Partly cloudy in the morning, then clear. High of 46F. Breezy. Winds from the SW at 10 to 20 mph.

  • Thursday Night

    Partly cloudy. Low of 27F with a windchill as low as 21F. Breezy. Winds from the SW at 10 to 20 mph.

  • Friday

    Clear. High of 37F with a windchill as low as 21F. Breezy. Winds from the WNW at 15 to 25 mph.

  • Friday Night

    Partly cloudy. Low of 25F with a windchill as low as 18F. Winds from the WNW at 10 to 15 mph.

  • Saturday

    Clear. High of 48F. Winds from the WSW at 10 to 15 mph.

  • Saturday Night

    Clear. Low of 21F with a windchill as low as 14F. Winds from the SW at 10 to 15 mph.

  • Sunday

    Clear. High of 36F with a windchill as low as 18F. Breezy. Winds from the WNW at 15 to 25 mph.

  • Sunday Night

    Clear. Fog overnight. Low of 16F with a windchill as low as 9F. Breezy. Winds from the WNW at 10 to 20 mph.

  • Monday

    Clear. High of 41F. Winds from the West at 5 to 10 mph.

  • Monday Night

    Clear. Fog overnight. Low of 10F. Winds from the West at 5 to 10 mph.

  • Tuesday

    Clear. High of 46F. Winds less than 5 mph.

  • Tuesday Night

    Clear. Low of 30F. Winds less than 5 mph.

  • Wednesday

    Clear. High of 50F. Winds from the SW at 5 to 10 mph.

  • Wednesday Night

    Clear. Low of 30F. Winds from the WSW at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: TMWC, Spearfish, SD

Updated: 8:02 AM MST

Temperature: 19.6 °F Dew Point: 6 °F Humidity: 54% Wind: WSW at 9.2 mph Pressure: 30.12 in Hourly Precipitation: 0.00 in Windchill: 9 °F Graphs

Location: Green Acres, Spearfish, SD

Updated: 8:02 AM MST

Temperature: 22.3 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: - Windchill: 22 °F Graphs

Location: Maitland Road, Spearfish, SD

Updated: 8:01 AM MST

Temperature: 14.0 °F Dew Point: 6 °F Humidity: 71% Wind: North at - Pressure: 30.25 in Hourly Precipitation: - Windchill: 14 °F Graphs

Location: Hat Ranch, Belle Fourche, SD

Updated: 8:00 AM MST

Temperature: 19.7 °F Dew Point: 10 °F Humidity: 64% Wind: West at 7.0 mph Pressure: 30.22 in Hourly Precipitation: 0.00 in Windchill: 11 °F Graphs

Location: NonFedAWOS BELLE FOURCHE SD US SUPERAWOS, Belle Fourche, SD

Updated: 7:35 AM MST

Temperature: 14 °F Dew Point: 7 °F Humidity: 73% Wind: West at 7 mph Pressure: 30.26 in Hourly Precipitation: 0.00 in Windchill: 4 °F Graphs

Location: Dumont Trailhead, Lead, SD

Updated: 7:58 AM MST

Temperature: 9.0 °F Dew Point: 4 °F Humidity: 80% Wind: WNW at 10.0 mph Pressure: 29.99 in Hourly Precipitation: 0.00 in Windchill: -5 °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 
238 am MST sun Mar 1 2015 


Short term...today through Monday night 
issued at 237 am MST sun Mar 1 2015 


Northwest flow will prevail in the period with a strong 
phasing system on track Monday into Tuesday. A strong northwest flow upper 
level trough will merge with the ejecting SW Continental U.S. Upper level 
trough...helping to force of period of long trajectory northerly 
flow. This will support another round of Arctic air into the 
Continental U.S....along with some snow and wind locally. A weaker shortwave 
will traverse the northern plains today...supporting reinforcing 
cold thermal fields. Lack of moisture with large scale sink 
locally...expected to support dry conds in the forecast area. Increasing return 
flow forced by shortwave ridging ahead of the approaching stronger 
northwest flow impulse...will support a warmer day Monday with continued 
dry conds...before snow and wind return to the region Monday night. 


Today...another northwest flow impulse expected into the region. Although 
most if not all of the lsa/uvm will pass north of the forecast area...cannot 
rule out a few high based snow showers over the north half of the forecast area 
and over the Black Hills given fairly steep ll lapse rates. 
However...given dry profiles...virga would be anticipated thus no 
probability of precipitation warranted. Steep ll lapse rates per insolation and mixing will 
force faster flow down supporting breezy conds...especially on the South Dakota 
plains with 15 to 25 miles per hour winds expected. Thermal fields will 
basically see near neutral temperature advection...with temperatures similar to Sat/S 
numbers...slightly warmer. Associated surface high will shift southeast of the 
region tonight...with gusty southerly return flow developing over NE 
Wyoming and portions of the South Dakota plains. 


Monday...return flow will rev up with southerly winds increasing 
through the day. Warm air advection will be ongoing with most locations seeing 40s 
for highs...possibly near 50 in the Lee of the Black Hills. Strong 
northwest flow upper trough and the ejecting SW Continental U.S. Upper low will 
support increasing large scale ascent across the southern half of 
the forecast area Monday evening with increasing moisture and forcing 
supporting increasing chances for snow. Better chances will arrive 
later Monday night as a strong cold front is forced through the 
forecast area...supporting increasing fgen across most of the forecast area...especially the 
southern third. Decent ll moisture coupled with modest forcing will 
at least support up to a couple inches of snow across scentral 
South Dakota...with lesser amounts outside of the northern Black Hills. 
Increasing flow with sufficient ll moisture and forcing in the dgz 
will support a good period of upslope in the Northern Hills with a 
few inches possible there by Tuesday morning. Strong cold air advection coupled with 
fast ll momentum will support strong gusty winds northwest winds on the South Dakota 
plains early Tuesday morning. Although snow amounts look minimal on 
the plains...blowing snow and hazardous travel is a concern and 
will certainly need to be monitored with future forecast packages. 
Very cold air will begin to advect into the region early Tuesday morning 
over the northwest half...with windchills falling below zero by dawn most 
places there. 


Long term...Tuesday through Saturday 
issued at 237 am MST sun Mar 1 2015 


Arctic high pressure continues to surge into the northern plains on 
Tuesday...with strong northwesterly winds persisting through much of 
the day...and temperatures steady or continuing to fall into the 
evening. Light snow will be likely from northeast Wyoming through 
southern South Dakota...with snowfall diminishing from north to 
south during the day. Temperatures will fall below zero across much 
of the area Tuesday night. 


The bitter cold will last through Wednesday before another warm up 
is expected. This next warm up...however...looks to be fairly long 
lived and dry. The GFS and European model (ecmwf) have been showing a very strong 
ridge building into the western US by midweek and persisting well 
beyond the end of the forecast period. Expect highs during that 
period to be above climatology for this time of year. 


&& 


Aviation...for the 12z tafs through 12z Monday morning 
issued at 237 am MST sun Mar 1 2015 


Local MVFR ceilings will be possible across northeast Wyoming and the 
Black Hills area through 18z. Otherwise...VFR conditions are 
expected through Monday morning. 


&& 


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


$$ 


Short term...jc 
long term...15 
aviation...15 












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