Roslyn, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Roslyn weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle18%0.01″84°60°—
- SundayJul 5Mostly Clear——86°61°+2°
- MondayJul 6Heavy Drizzle43%—95°69°+9°
- TuesdayJul 7Heavy Showers50%0.29″88°63°-7°
- WednesdayJul 8Showers67%0.25″76°58°-12°
- ThursdayJul 9Overcast23%—80°58°+4°
- FridayJul 10T-storm w/ Hail25%—84°65°+4°
AQI 59 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 13.9 µg/m³ (AQI 60) with a 0.85 fine-to-coarse ratio and 3 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
PM × Wind × Precip
PM2.5 at 13.9 µg/m³ (AQI 60) with a 0.85 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.85
- 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
- 11:34 PM
- Moonset
- 10:30 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Roslyn at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: May 19 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57261
15-Day Forecast — Roslyn
- Sat84°60°18%
- Sun86°61°1%
- Mon95°69°43%
- Tue88°63°50%
- Wed76°58°67%
- Thu80°58°23%
- Fri84°65°25%
- Sat81°62°23%
- Sun92°59°8%
- Mon79°62°8%
- Tue82°56°9%
- Wed93°61°13%
- Thu98°73°23%
- Fri84°63°16%
- Sat94°60°19%
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 — Roslyn
SPC has placed Roslyn in the Marginal Risk category for severe thunderstorms day after tomorrow.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3MRGLMarginal Risk
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 Roslyn
- 57261