Box Elder, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Box Elder weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast18%—73°56°—
- ThursdayJun 4Showers24%0.24″77°55°+4°
- FridayJun 5Light Drizzle21%0.02″81°57°+4°
- SaturdayJun 6Overcast——98°63°+17°
- SundayJun 7Drizzle28%—98°68°0°
- MondayJun 8Overcast28%—83°59°-15°
- TuesdayJun 9Overcast14%—101°67°+18°
PM2.5 at 6.8 µg/m³ (AQI 38) with a 0.83 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust. AQI flat over the last 6 hours (within ±3 points).
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 30 now. With UV 0.0 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 5 by mid-afternoon.
- Present
- AQI 30
- UV peak
- 0.0 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 5
PM × Wind × Precip
PM2.5 at 6.8 µg/m³ (AQI 38) with a 0.83 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:37 AM
- Moonset
- 2:43 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Box Elder at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: May 11 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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 — Box Elder
SPC has placed Box Elder in the Slight Risk category for severe thunderstorms tomorrow.
- TODAYNONENo severe risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.
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.