Iowa City, Iowa Weather
Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Iowa City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Rain61%0.25″85°69°—
- SundayJul 5Overcast12%—85°70°0°
- MondayJul 6Mostly Clear——82°66°-3°
- TuesdayJul 7Overcast——81°64°-1°
- WednesdayJul 8Overcast24%—83°64°+2°
- ThursdayJul 9Showers31%—81°70°-2°
- FridayJul 10Overcast18%—80°66°-1°
AQI 24 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 34 now. With UV 1.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 10 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 34 now. With UV 1.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 34
- UV peak
- 1.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 5.4 µg/m³ (AQI 30) with a 0.74 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.74
- Wind
- light
- 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
- 11:03 PM
- Moonset
- 10:10 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Iowa City at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 26 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 52240, 52242, 52245, 52246
16-Day Forecast — Iowa City
- Sat85°69°61%
- Sun85°70°12%
- Mon82°66°2%
- Tue81°64°3%
- Wed83°64°24%
- Thu81°70°31%
- Fri80°66°18%
- Sat85°67°9%
- Sun68°59°8%
- Mon76°55°9%
- Tue78°61°9%
- Wed78°64°11%
- Thu82°67°14%
- Fri83°68°13%
- Sat84°70°11%
- Sun85°71°19%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Iowa City
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 — Iowa City
SPC includes Iowa City 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 Iowa City
- 52245
- 52246
- 52240
- 52242
- 52243
- 52244