River Sioux, Iowa Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
River Sioux weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Light Drizzle46%0.03″76°68°—
- FridayJun 5Thunderstorm59%0.01″83°67°+7°
- SaturdayJun 6Drizzle59%—87°65°+4°
- SundayJun 7Showers56%—81°68°-6°
- MondayJun 8Overcast33%—87°66°+6°
- TuesdayJun 9Thunderstorm25%—92°67°+5°
- WednesdayJun 10Thunderstorm13%—97°76°+5°
AQI 29 (Good), driven by Ozone. AQI down 20 over the last 6 hours — air quality is improving sharply.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
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
- 4:59 AM
- Moonset
- 2:21 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
River Sioux at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: April 27 (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 — River Sioux
SPC has placed River Sioux 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.