Seymour, Iowa Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Seymour weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast16%—87°69°—
- MondayJul 6Overcast——87°67°0°
- TuesdayJul 7Overcast——83°64°-4°
- WednesdayJul 8Overcast28%—87°64°+4°
- ThursdayJul 9Thunderstorm55%0.01″79°66°-8°
- FridayJul 10Drizzle34%0.03″81°63°+2°
- SaturdayJul 11Light Showers—0.11″79°67°-2°
AQI 32 (Good), driven by PM2.5. AQI down 7 over the last 6 hours (gradual decline). PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.91 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
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 34 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 15 around 1 PM.
- Present
- AQI 34
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 15
PM × Wind × Precip
PM2.5 at 7.8 µg/m³ (AQI 43) with a 0.91 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- 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
- 11:31 PM
- Moonset
- 11:25 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Seymour at a glance
- Today vs. normal: 71°F — typical for the season
- Last frost: April 20 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 52590
15-Day Forecast — Seymour
- Sun87°69°16%
- Mon87°67°2%
- Tue83°64°1%
- Wed87°64°28%
- Thu79°66°55%
- Fri81°63°34%
- Sat79°67°6%
- Sun85°68°7%
- Mon87°70°5%
- Tue88°71°3%
- Wed85°69°7%
- Thu88°69°17%
- Fri85°68°17%
- Sat86°66°13%
- Sun89°68°13%
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 — Seymour
SPC includes Seymour 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 Seymour
- 52590