Rockham, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Rockham weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Drizzle12%0.03″88°62°—
- SundayJul 5Clear——90°64°+2°
- MondayJul 6Heavy Rain59%0.41″100°67°+10°
- TuesdayJul 7Heavy Showers63%0.45″96°65°-4°
- WednesdayJul 8Showers73%0.01″82°64°-14°
- ThursdayJul 9Heavy Drizzle14%0.24″79°61°-3°
- FridayJul 10Light Drizzle18%—76°61°-3°
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 12.8 µg/m³ (AQI 58) with a 0.81 fine-to-coarse ratio and 4 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
Ozone × UV × Sky
Ozone at AQI 48 now. With UV 6.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 38 around 1 PM.
- Present
- AQI 48
- UV peak
- 6.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 38
PM × Wind × Precip
PM2.5 at 12.8 µg/m³ (AQI 58) with a 0.81 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.81
- 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
- 11:38 PM
- Moonset
- 10:37 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Rockham at a glance
- Today vs. normal: 18°F above the seasonal normal for this latitude
- Last frost: May 15 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57470
16-Day Forecast — Rockham
- Sat88°62°12%
- Sun90°64°1%
- Mon100°67°59%
- Tue96°65°63%
- Wed82°64°73%
- Thu79°61°14%
- Fri76°61°18%
- Sat80°57°18%
- Sun87°60°8%
- Mon89°63°7%
- Tue96°66°10%
- Wed100°68°13%
- Thu93°75°14%
- Fri78°65°19%
- Sat84°61°13%
- Sun87°58°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 — Rockham
SPC has placed Rockham 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 Rockham
- 57470