Sumner, Iowa Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Sumner weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Light Drizzle36%0.01″81°69°—
- SundayJul 5Overcast11%—81°66°0°
- MondayJul 6Partly Cloudy——79°64°-2°
- TuesdayJul 7Overcast——81°63°+2°
- WednesdayJul 8T-storm w/ Hail39%—80°65°-1°
- ThursdayJul 9Overcast44%—77°63°-3°
- FridayJul 10Light Drizzle15%—79°62°+2°
AQI 41 (Good), driven by PM2.5. AQI up 6 over the last 6 hours (gradual rise). PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.75 fine-to-coarse ratio and 2 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 44 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 44
- UV peak
- 4.3 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 8.9 µg/m³ (AQI 49) with a 0.75 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.75
- 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
- 11:07 PM
- Moonset
- 10:11 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Sumner at a glance
- Today vs. normal: 12°F above the seasonal normal for this latitude
- Last frost: May 3 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 50674
16-Day Forecast — Sumner
- Sat82°69°36%
- Sun81°66°11%
- Mon79°64°2%
- Tue81°63°2%
- Wed80°65°39%
- Thu77°63°44%
- Fri79°62°15%
- Sat74°60°15%
- Sun77°56°11%
- Mon76°57°8%
- Tue79°60°5%
- Wed76°58°26%
- Thu79°63°29%
- Fri81°65°33%
- Sat72°59°28%
- Sun74°58°19%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 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 — Sumner
SPC includes Sumner in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- 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 Sumner
- 50674