North Sioux City, South Dakota Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
North Sioux City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast32%—81°68°—
- FridayJun 5Overcast——89°66°+8°
- SaturdayJun 6Overcast10%—87°68°-2°
- SundayJun 7Overcast38%—84°69°-3°
- MondayJun 8Thunderstorm32%—91°66°+7°
- TuesdayJun 9Thunderstorm19%0.21″92°67°+1°
- WednesdayJun 10Thunderstorm15%—102°75°+10°
Ozone at AQI 34 — peak already passed at 1 PM under overcast skies. AQI flat over the last 6 hours (within ±3 points). Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 34 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 34
- UV peak
- 1.8 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 34
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 5:04 AM
- Moonset
- 2:20 PM
- In sign
- ♒︎ Aquarius
Prairie lightning bugs rise
North Sioux City at a glance
- Today vs. normal: 9°F above the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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 — North Sioux City
SPC has placed North Sioux City in the Slight Risk category for severe thunderstorms tomorrow.
- TODAYMRGLMarginal Risk
- TOMORROWSLGTSlight Risk
- DAY 3TSTMGeneral Thunderstorms
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.