Osceola, Iowa Weather
Prairie lightning bugs rise. Day 77 of spring. Read this microseason across nine climate regions →
Osceola weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Mostly Clear——80°57°—
- ThursdayJun 4Heavy Rain44%0.96″81°63°+1°
- FridayJun 5Thunderstorm77%1.0″81°66°0°
- SaturdayJun 6Thunderstorm77%0.04″83°63°+2°
- SundayJun 7Showers65%0.01″82°68°-1°
- MondayJun 8Light Showers61%—79°67°-3°
- TuesdayJun 9Thunderstorm18%—87°69°+8°
Ozone at AQI 39. AQI flat over the last 6 hours (within ±3 points). Overcast through the UV peak window (cloud cover ~99%) — afternoon ozone should stay flat.
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 39. Overcast through the UV peak window (cloud cover ~99%) — afternoon ozone should stay flat.
- Present
- AQI 39
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 5
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
- 4:48 AM
- Moonset
- 2:14 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Osceola at a glance
- Today vs. normal: 6°F below the seasonal normal for this latitude
- Last frost: April 22 (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 — Osceola
SPC has placed Osceola in the Slight Risk category for severe thunderstorms day after tomorrow.
- TODAYNONENo severe risk
- TOMORROWMRGLMarginal Risk
- DAY 3SLGTSlight Risk
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.