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Belle Fourche, South Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Belle Fourche SD
National Weather Service Forecast for: Belle Fourche SD
Issued by: National Weather Service Rapid City, SD
Updated: 3:29 am MDT Jul 16, 2025
 
Overnight

Overnight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am.  Patchy fog.  Otherwise, cloudy, with a steady temperature around 54. East wind around 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 60%.
Showers
Likely and
Patchy Fog

Wednesday

Wednesday: Showers and thunderstorms, mainly before 3pm.  Patchy fog before 4pm. High near 57. East wind 10 to 15 mph, with gusts as high as 20 mph.  Chance of precipitation is 100%.
Showers and
Patchy Fog

Wednesday
Night
Wednesday Night: A 20 percent chance of showers before 7pm.  Patchy fog before 9pm.  Otherwise, mostly cloudy, with a low around 48. East wind around 10 mph, with gusts as high as 20 mph.
Slight Chance
Showers and
Patchy Fog
then Mostly
Cloudy
Thursday

Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 77. East wind 10 to 15 mph, with gusts as high as 25 mph.
Decreasing
Clouds

Thursday
Night
Thursday Night: A 40 percent chance of showers and thunderstorms.  Mostly clear, with a low around 55. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Chance
T-storms

Friday

Friday: Sunny, with a high near 82. Northwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Sunny


Friday
Night
Friday Night: A 30 percent chance of showers and thunderstorms after midnight.  Increasing clouds, with a low around 59. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Partly Cloudy
then Chance
Showers

Saturday

Saturday: A chance of showers and thunderstorms.  Partly sunny, with a high near 81. East wind 5 to 15 mph, with gusts as high as 25 mph.
Chance
Showers then
Chance
T-storms
Saturday
Night
Saturday Night: A chance of showers and thunderstorms before midnight.  Partly cloudy, with a low around 60.
Chance
T-storms then
Partly Cloudy

Lo 54 °F Hi 57 °F Lo 48 °F Hi 77 °F Lo 55 °F Hi 82 °F Lo 59 °F Hi 81 °F Lo 60 °F

Hazardous Weather Outlook
 

Overnight
 
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Otherwise, cloudy, with a steady temperature around 54. East wind around 15 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Wednesday
 
Showers and thunderstorms, mainly before 3pm. Patchy fog before 4pm. High near 57. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 100%.
Wednesday Night
 
A 20 percent chance of showers before 7pm. Patchy fog before 9pm. Otherwise, mostly cloudy, with a low around 48. East wind around 10 mph, with gusts as high as 20 mph.
Thursday
 
Mostly cloudy, then gradually becoming sunny, with a high near 77. East wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday Night
 
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 55. East wind 5 to 15 mph becoming northwest after midnight. Winds could gust as high as 25 mph.
Friday
 
Sunny, with a high near 82. Northwest wind 5 to 10 mph becoming east in the afternoon. Winds could gust as high as 15 mph.
Friday Night
 
A 30 percent chance of showers and thunderstorms after midnight. Increasing clouds, with a low around 59. Southeast wind 5 to 10 mph, with gusts as high as 15 mph.
Saturday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 81. East wind 5 to 15 mph, with gusts as high as 25 mph.
Saturday Night
 
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 60.
Sunday
 
Sunny, with a high near 88.
Sunday Night
 
A slight chance of showers and thunderstorms. Mostly clear, with a low around 62.
Monday
 
A slight chance of showers and thunderstorms. Sunny, with a high near 86.
Monday Night
 
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 60.
Tuesday
 
Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Belle Fourche SD.

Weather Forecast Discussion
958
FXUS63 KUNR 160830
AFDUNR

Area Forecast Discussion For Western SD and Northeastern WY
National Weather Service Rapid City SD
230 AM MDT Wed Jul 16 2025

.KEY MESSAGES...

- Showers/isolated thunderstorms continue today with 15-30F below
  normal temperatures
- Zonal flow promotes a return to summer by Sunday with daily
  opportunities for thunderstorms into next week

&&

.DISCUSSION...(Today Through Tuesday)
Issued at 227 AM MDT Wed Jul 16 2025

08z surface analysis had cold front south/east of the CWA with
high pressure over south-central Canada promoting northeasterly
upslope flow over western SD. Water vapour loop had upper trough
from SK to ID with lead wave over eastern WY assisting initial
band of shra/TS moving through the CWA. Main synoptic/QG-forcing
over MT/northwest WY sliding eastward with additional shra/TS
ahead of it. Disposition of upper trough the main short term
forecast concern.

Today, upper trough moves across the northern plains as initial
shra/TS shifts east of CWA and next band of precipitation slides
across the area. Latest HREF (50-80% chance >0.25" additional QPF)
guidance shows best QPF from second wave over the northern half
of the CWA. Upslope flow will support low clouds/fog at times and
perhaps even some drizzle outside of shra/TS. Temperatures will be
15-30F below normal with guidance depicting well.

Tonight, precipitation wanes this evening with perhaps some fog
overnight, especially in/near the Black Hills. As surface high
slips into the area, temperatures will be within reach of a few
record lows if low clouds/fog dissipate.

Thursday through early next week, zonal flow expected with a
series of disturbances moving across the US/Canadian border
dropping boundaries through the northern plains. An almost daily
chance of TSRA is painted, but plenty of dry hours are foreseen.
Thermal ridge expands into the area for the weekend with a return
to summery temperatures Sunday through Tuesday.

&&

.AVIATION...(For the 06Z TAFS Through 06Z Wednesday Night)
Issued At 1051 PM MDT Tue Jul 15 2025

Widespread MVFR/IFR CIGS are expected through the TAF period
through the rest of tonight into Wednesday. Ongoing line of SHRA/TSRA
over northeastern WY will continue to move east through the
overnight hours. Widespread showers and isolated TSRA will
continue through much of Wednesday. VSBY will also drop overnight
and persist into Wednesday as FG/BR develop.

&&

.UNR WATCHES/WARNINGS/ADVISORIES...
SD...None.
WY...None.
&&

$$

DISCUSSION/KEY MESSAGES...Helgeson
AVIATION...Wong
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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