Onaka, South Dakota Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Onaka weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast10%—87°61°—
- SundayJul 5Clear——88°62°+1°
- MondayJul 6Light Showers56%0.06″99°66°+11°
- TuesdayJul 7Light Showers74%—98°65°-1°
- WednesdayJul 8Light Showers74%0.01″80°63°-18°
- ThursdayJul 9Overcast16%—81°58°+1°
- FridayJul 10Light Drizzle16%—92°65°+11°
AQI 56 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 13.6 µg/m³ (AQI 59) with a 0.80 fine-to-coarse ratio and 5 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 45 now. With UV 5.8 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 35 around 1 PM.
- Present
- AQI 45
- UV peak
- 5.8 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 35
PM × Wind × Precip
PM2.5 at 13.6 µg/m³ (AQI 59) with a 0.80 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.80
- Wind
- light
- 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
- 11:41 PM
- Moonset
- 10:39 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Onaka at a glance
- Today vs. normal: 14°F above the seasonal normal for this latitude
- Last frost: May 17 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 57466
16-Day Forecast — Onaka
- Sat87°61°10%
- Sun88°62°1%
- Mon99°66°56%
- Tue98°65°74%
- Wed80°63°74%
- Thu81°58°16%
- Fri92°65°16%
- Sat83°61°16%
- Sun86°54°6%
- Mon99°66°9%
- Tue100°68°11%
- Wed87°60°11%
- Thu95°62°19%
- Fri96°64°23%
- Sat99°68°13%
- Sun107°78°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 — Onaka
SPC has placed Onaka 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 Onaka
- 57466