Belle Fourche, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Belle Fourche weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle17%0.01″90°57°—
- SundayJul 5Overcast——99°62°+9°
- MondayJul 6Light Drizzle14%—97°68°-2°
- TuesdayJul 7Light Showers62%0.02″94°68°-3°
- WednesdayJul 8Light Drizzle62%—88°63°-6°
- ThursdayJul 9Light Drizzle35%—89°67°+1°
- FridayJul 10Clear19%—86°60°-3°
AQI 59 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 14.7 µg/m³ (AQI 61) with a 0.77 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 56 now. With UV 8.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 60 around 1 PM.
- Present
- AQI 56
- UV peak
- 8.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 60
PM × Wind × Precip
PM2.5 at 14.7 µg/m³ (AQI 61) with a 0.77 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.77
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:57 PM
- Moonset
- 9:59 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Belle Fourche at a glance
- Today vs. normal: 17°F above the seasonal normal for this latitude
- Last frost: May 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57717
16-Day Forecast — Belle Fourche
- Sat90°57°17%
- Sun99°62°2%
- Mon97°68°14%
- Tue94°68°62%
- Wed88°63°62%
- Thu89°67°35%
- Fri86°60°19%
- Sat91°57°11%
- Sun102°63°5%
- Mon104°68°8%
- Tue109°73°16%
- Wed112°77°18%
- Thu95°69°27%
- Fri88°64°26%
- Sat89°58°23%
- Sun95°61°23%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Belle Fourche
SPC has placed Belle Fourche in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWNONENo severe risk
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Belle Fourche
- 57717