Boulder Canyon, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Boulder Canyon weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Heavy Rain50%0.51″74°55°—
- FridayJun 5Overcast12%—79°57°+5°
- SaturdayJun 6Overcast——95°67°+16°
- SundayJun 7Overcast46%—92°62°-3°
- MondayJun 8Light Drizzle46%—85°53°-7°
- TuesdayJun 9Partly Cloudy11%—97°67°+12°
- WednesdayJun 10Overcast20%—90°71°-7°
PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.7 µg/m³, PM10 to 9.7 µg/m³. 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 37 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 37
- UV peak
- 2.6 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 37
PM × Wind × Precip
PM scrubbed by 2 hours of recent rain — PM2.5 down to 7.7 µg/m³, PM10 to 9.7 µg/m³.
- PM2.5/PM10
- 0.79
- Wind
- breezy
- Recent rain
- 2h in last 6h
- Pattern
- washed out
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
- 5:41 AM
- Moonset
- 2:44 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
Boulder Canyon at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: May 12 (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 — Boulder Canyon
SPC has placed Boulder Canyon in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWNONENo severe 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.