Knoxville, Arkansas Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Knoxville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast23%—93°73°—
- SundayJul 5Overcast18%—93°71°0°
- MondayJul 6Light Drizzle19%—96°72°+3°
- TuesdayJul 7Overcast12%—96°70°0°
- WednesdayJul 8Overcast——100°72°+4°
- ThursdayJul 9Overcast——102°71°+2°
- FridayJul 10Overcast20%—98°76°-4°
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 10.9 µg/m³, PM10 at 11.6 µg/m³ — typical background levels with no transport signature.
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 31. Overcast through the UV peak window (cloud cover ~94%) — afternoon ozone should stay flat.
- Present
- AQI 31
- UV peak
- 0.0 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 4
PM × Wind × Precip
PM2.5 at 10.9 µg/m³, PM10 at 11.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.94
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 11:29 PM
- Moonset
- 11:27 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Knoxville at a glance
- Today vs. normal: 3°F below the seasonal normal for this latitude
- Last frost: March 19 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 72845
16-Day Forecast — Knoxville
- Sat93°73°23%
- Sun94°71°18%
- Mon96°72°19%
- Tue96°70°12%
- Wed100°72°3%
- Thu102°71°9%
- Fri98°76°20%
- Sat96°68°28%
- Sun76°68°17%
- Mon85°64°5%
- Tue91°67°5%
- Wed96°71°11%
- Thu101°73°13%
- Fri100°74°13%
- Sat101°74°16%
- Sun101°73°26%
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 has placed Knoxville in the Slight Risk category for severe thunderstorms today.
- TODAYSLGTSlight Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
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.
ZIP codes in Knoxville
- 72845