Decorah, Iowa Weather
Prairie lightning bugs rise. Day 76 of spring. Read this microseason across nine climate regions →
Decorah weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——83°56°—
- ThursdayJun 4Showers44%0.40″85°59°+2°
- FridayJun 5Showers78%—80°64°-5°
- SaturdayJun 6Drizzle49%—81°63°+1°
- SundayJun 7Overcast20%—79°63°-2°
- MondayJun 8Light Drizzle34%0.01″73°63°-6°
- TuesdayJun 9Light Drizzle23%—79°69°+6°
Ozone at AQI 85 — peak already passed at 1 PM under clear skies. AQI up 31 in the last 6 hours — air quality is degrading. Levels should ease through evening.
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 85 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 85
- UV peak
- 1.0 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 85
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).
The higher the clouds, the finer the weather.
- Moonrise
- 4:12 AM
- Moonset
- 12:53 PM
- In sign
- ♑︎ Capricorn
Prairie lightning bugs rise
Decorah at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: May 6 (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 3, 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 — Decorah
SPC has placed Decorah 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.