Knoxville, Iowa Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Knoxville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast10%—88°67°—
- MondayJul 6Light Drizzle——90°67°+2°
- TuesdayJul 7Light Drizzle——85°66°-5°
- WednesdayJul 8T-storm w/ Hail37%—88°66°+3°
- ThursdayJul 9Light Showers59%0.05″76°66°-12°
- FridayJul 10Overcast25%—81°66°+5°
- SaturdayJul 11Light Drizzle——76°64°-5°
AQI 38 (Good), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). 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.
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 5.6 µg/m³ (AQI 31) with a 0.90 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.90
- 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
- 11:32 PM
- Moonset
- 11:24 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Knoxville at a glance
- Today vs. normal: 72°F — typical for the season
- Last frost: April 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 50138
15-Day Forecast — Knoxville
- Sun88°67°10%
- Mon90°67°2%
- Tue85°66°1%
- Wed88°66°37%
- Thu76°66°59%
- Fri81°66°25%
- Sat76°64°6%
- Sun77°58°7%
- Mon82°60°6%
- Tue85°67°3%
- Wed84°69°8%
- Thu89°70°19%
- Fri91°73°14%
- Sat91°75°13%
- Sun84°64°16%
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 — Knoxville
SPC includes Knoxville 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 Knoxville
- 50138