South Sioux City, Nebraska Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
South Sioux City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast——85°71°—
- SundayJul 5Overcast10%—94°65°+9°
- MondayJul 6Overcast——93°71°-1°
- TuesdayJul 7Overcast——94°70°+1°
- WednesdayJul 8Heavy Drizzle45%—93°68°-1°
- ThursdayJul 9Light Drizzle45%—82°64°-11°
- FridayJul 10Mostly Clear10%—90°64°+8°
AQI 61 (Moderate), driven by Ozone. AQI up 14 over the last 6 hours (gradual rise). Ozone at AQI 49 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 around 1 PM.
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 49 now. With UV 0.1 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 12 around 1 PM.
- Present
- AQI 49
- UV peak
- 0.1 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 12
PM × Wind × Precip
PM2.5 at 7.5 µg/m³ (AQI 42) with a 0.83 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.83
- 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
- 11:46 PM
- Moonset
- 11:38 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
South Sioux City at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: May 1 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 68776
16-Day Forecast — South Sioux City
- Sat85°71°8%
- Sun94°65°10%
- Mon93°71°1%
- Tue94°70°6%
- Wed93°68°45%
- Thu82°64°45%
- Fri90°64°10%
- Sat85°66°11%
- Sun87°62°5%
- Mon94°68°4%
- Tue99°72°5%
- Wed103°70°7%
- Thu111°77°13%
- Fri101°75°13%
- Sat108°73°10%
- Sun93°66°10%
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 — South Sioux City
SPC includes South Sioux City in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWNONENo severe risk
- DAY 3NONENo severe risk
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
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 South Sioux City
- 68776