Marvin, South Dakota Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Marvin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——85°60°—
- MondayJul 6Overcast15%—91°69°+6°
- TuesdayJul 7Thunderstorm71%0.03″84°68°-7°
- WednesdayJul 8Heavy Showers87%0.36″77°64°-7°
- ThursdayJul 9Overcast——81°58°+4°
- FridayJul 10Overcast——83°62°+2°
- SaturdayJul 11Partly Cloudy——94°63°+11°
AQI 44 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 50 — peak already passed at 1 PM under clear skies. 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 50 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 50
- UV peak
- 6.8 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 50
PM × Wind × Precip
PM2.5 at 8.7 µg/m³, PM10 at 11.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.78
- 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
- 11:50 PM
- Moonset
- 11:39 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Marvin at a glance
- Today vs. normal: 19°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
- Sun86°60°0%
- Mon91°69°15%
- Tue84°68°71%
- Wed77°64°87%
- Thu81°58°7%
- Fri83°62°7%
- Sat94°63°7%
- Sun92°66°8%
- Mon84°56°8%
- Tue85°61°9%
- Wed91°58°15%
- Thu92°69°14%
- Fri100°71°17%
- Sat105°75°10%
- Sun97°73°16%
- Mon109°74°16%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3SLGTSlight 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.
ZIP codes in Marvin
- 57251