Roslyn, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Roslyn weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast36%—78°62°—
- FridayJun 5Heavy Rain43%0.81″77°62°-1°
- SaturdayJun 6Overcast——81°58°+4°
- SundayJun 7Thunderstorm16%—86°65°+5°
- MondayJun 8Drizzle35%—86°65°0°
- TuesdayJun 9Light Drizzle15%—87°63°+1°
- WednesdayJun 10Thunderstorm23%—98°70°+11°
Ozone at AQI 44 — peak already passed at 1 PM under partly cloudy skies. AQI up 14 over the last 6 hours (gradual rise). Levels should ease through evening.
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 44 — peak already passed at 1 PM under partly cloudy skies. Levels should ease through evening.
- Present
- AQI 44
- UV peak
- 2.2 at earlier today
- Sky at peak
- partly cloudy
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 5.5 µg/m³, PM10 at 9.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.59
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 5:19 AM
- Moonset
- 2:14 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
Roslyn at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: May 19 (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 — Roslyn
SPC has placed Roslyn in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3NONENo severe risk
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.