Marvin, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Marvin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast18%—86°64°—
- SundayJul 5Overcast——86°66°0°
- MondayJul 6Overcast41%—91°68°+5°
- TuesdayJul 7Drizzle53%—94°66°+3°
- WednesdayJul 8Heavy Drizzle76%0.01″79°61°-15°
- ThursdayJul 9Overcast20%—80°58°+1°
- FridayJul 10Overcast15%—93°64°+13°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 11.3 µg/m³, PM10 at 13.4 µg/m³ — typical background levels with no transport signature.
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 33 now. With UV 4.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 22 around 1 PM.
- Present
- AQI 33
- UV peak
- 4.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 22
PM × Wind × Precip
PM2.5 at 11.3 µg/m³, PM10 at 13.4 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.84
- Wind
- light
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:31 PM
- Moonset
- 10:28 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Marvin at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: May 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57251
16-Day Forecast — Marvin
- Sat86°64°18%
- Sun86°66°2%
- Mon91°68°41%
- Tue94°66°53%
- Wed79°61°76%
- Thu80°58°20%
- Fri93°64°15%
- Sat78°60°18%
- Sun83°54°14%
- Mon90°57°7%
- Tue98°68°9%
- Wed87°62°13%
- Thu94°60°10%
- Fri95°67°19%
- Sat97°67°29%
- Sun104°72°20%
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 — Marvin
SPC has placed Marvin in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- 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 Marvin
- 57251