Weather StoryAlmanac, microseasons, and the day's weather story.

Knoxville, Tennessee Weather

Dusk arrives one minute earlier each night. Day 43 of summer. Read this microseason across nine climate regions →

Knoxville weather forecast — hour by hour, 7-day outlook, NOAA radar

Knoxville, TN
Sunday, August 2 at 11:00 AM
78
°
Clear
Feels like
85°
Humidity
83%
Wind
8 mph
Sunrise
2:44 AM
Sunset
4:39 PM
Knoxville, TN
Hour by hour · 24h
24-Hour ForecastKnoxville, TN: 24-hour forecast. Temperatures range from 69 to 82 degrees Fahrenheit.
L 69°H 82°
Knoxville, TN
7-day forecast
  1. Today
    Aug 2
    Heavy Rain
    77%
    0.79″
    82°71°—
  2. Monday
    Aug 3
    Showers
    31%
    0.21″
    78°69°-4°
  3. Tuesday
    Aug 4
    Thunderstorm
    63%
    —
    88°67°+10°
  4. Wednesday
    Aug 5
    Heavy Drizzle
    70%
    —
    86°69°-2°
  5. Thursday
    Aug 6
    Heavy Drizzle
    32%
    —
    91°70°+5°
  6. Friday
    Aug 7
    Drizzle
    36%
    —
    90°70°-1°
  7. Saturday
    Aug 8
    Light Drizzle
    47%
    —
    94°72°+4°
Knoxville, TN
Next 24 hours · Mild now
66°76°86°12p6p12a6anow 76°high 82°low 69°PRECIP %
Knoxville, TN
Anemometer · 24h winds · from true
NESW
From · True
SW
228° · backing 153°
Direction
SW
228°
Sustained
8
mph
Gust
17
mph
Peak 24h
28
avg 4 mph
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 mph · pk 28 mph @ 12:00a
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 182SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 153° from the sw.
Knoxville, TN
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
975.9
+0.9 mb in 3h · rising · 28.82 inHg
Now
975.9
mb
3h
+0.9
mb
12h
+1.2
mb
24h
-3.3
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 975–979
970975980985-21h-18h-15h-12h-9h-6h-3h-24hNOW979.3974.6975.9
The low is filling — pressure climbing out of storm territory.
Knoxville, TN
Air quality
53
AQI
Moderate
→-3 in 6h

AQI 53 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 34 now. With UV 3.4 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 11.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5Good
3.1μg/m³
PM 10Good
3μg/m³
NO₂Good
2μg/m³
OzoneDRIVERModerate
73μg/m³
UV IndexModerate
2.4

What's driving it

Ozone × UV × Sky

Ozone at AQI 34 now. With UV 3.4 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 11.

Present
AQI 34
UV peak
3.4 at 1 PM
Sky at peak
partly cloudy
Projected peak
AQI 11

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).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³460
Knoxville, TN
Sky cover · visibility · 24h
Cloud cover
5%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
36.1mi
UNLIMITED
37 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
15:00 UTC · Knoxville, TN · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
15:00 UTC · Knoxville, TN · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Knoxville, TN
Satellite · infrared · animated
Knoxville, TN
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Knoxville, TN
Almanac · Sunday, August 2
Red sky at night, sailor's delight.
Civil dawn
6:16 AM
Sunrise
2:44 AM
Daylight
13h 55m
Sunset
4:39 PM
Civil dusk
9:09 PM
Planting note
Sow fall peas. Start kale and collard seedlings for fall.
Knoxville, TN
The moon
Waning Gibbous
84% illuminated
Moonrise
10:18 PM
Moonset
10:39 AM
In sign
♓︎ Pisces
Knoxville, TN
Microseason
Aug 1–5

Dusk arrives one minute earlier each night

celestial
Jan 159% of the yearDec 31

Read this microseason across nine climate regions →

Knoxville at a glance

  • Today vs. normal: 11°F above the seasonal normal for this latitude
  • Last frost: March 23 (climatological average for this latitude)
  • Microseason: Aug 1–5
  • Planting window: Sow fall peas. Start kale and collard seedlings for fall.

ZIP codes: 37902, 37909, 37912, 37914, 37915, 37916, 37917, 37918 +10 more

16-Day Forecast — Knoxville

  1. Sun82°71°77%
  2. Mon78°69°31%
  3. Tue88°67°63%
  4. Wed86°69°70%
  5. Thu91°70°32%
  6. Fri90°70°36%
  7. Sat94°72°47%
  8. Sun94°72°41%
  9. Mon88°73°41%
  10. Tue94°73°29%
  11. Wed96°74°38%
  12. Thu97°75°52%
  13. Fri97°76°52%
  14. Sat94°73°45%
  15. Sun94°71°42%
  16. Mon93°72°43%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Knoxville

Right now in the garden

Peak growing season

As of August 2, 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 3TSTMGeneral Thunderstorms

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.

Sun & seasons in Knoxville

Knoxville sits in Knox County, where the year’s longest day runs 14h 36m of daylight and its shortest just 9h 43m — a swing of +4h 53m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.

Nashville, the state’s largest city, lies about 159 miles to the W. The nearest town Knoxville tracks is Kahite, roughly 32 miles to the SSW.

Air quality in Knoxville’s county has held roughly steady since 2020; its cleanest year on record was 2020 (median AQI 44). See the full air-quality history for Knoxville.

January 1–5: Frost quiets the live oaks.January 6–10: Still water thickens with ice.January 11–15: Springs begin to move beneath ice.January 16–20: Cardinal dawn calls grow bolder.January 21–25: Late January thaw pulses.January 26–31: Last freeze locks the land.February 1–5: February's lengthening light.February 6–10: Warming winds thaw the margin.February 11–15: Magnolia blooms break the gray.February 16–20: Mockingbirds resume the dawn chorus.February 21–25: Rain replaces the last snow.February 26–28: Mist clings to greening valleys.March 1–5: The green pulse awakens.March 6–10: Hibernators emerge to call.March 11–15: Dogwood and redbud ignite.March 16–20: Swallowtails emerge from winter silk.March 21–25: Light crowns the dogwood canopy.March 26–31: Redbud cascades over the thaw.April 1–5: Thunder announces the wet season.April 6–10: Barn swallows carve the warming sky.April 11–15: Magnolia blooms and falls in a breath.April 16–20: First rainbows arch over thunderheads.April 21–25: Reeds push through marsh water.April 26–30: Frost retreats; seedlings rise free.May 1–5: Warblers flood the canopy in waves.May 6–10: Tulip poplar lights the forest crown.May 11–15: Shad pulse upstream through rapids.May 16–20: Roses open on the Piedmont edge.May 21–25: Fireflies scout the humid dusk.May 26–31: Frog choruses rise from every wetland.June 1–5: Fireflies pulse through the magnolias.June 6–10: Kudzu climbs deeper into green.June 11–15: Sun climbs to its northern throne.June 16–20: Heat settles and the rain begins.June 21–25: The longest day turns toward shadow.June 26–30: Fireflies drift through Spanish moss.July 1–5: Cicadas claim the scorching afternoon.July 6–10: Thunderheads boil and break at dusk.July 11–15: Thunder builds each drowsy afternoon.July 16–20: Cicadas claim the long noon.July 21–25: Dog days drape the earth in haze.July 26–31: Katydids begin their rasping chorus.August 1–5: Dusk arrives one minute earlier each night.August 6–10: Meteorological summer's turning page.August 11–15: Cool winds gather at the margins.August 16–20: Dog-day cicadas rise.August 21–25: Heat breaks in creek beds.August 26–31: Monarchs gather strength.September 1–5: Harvests begin in earnest.September 6–10: Dew beads on resurrection fern.September 11–15: Raptors trail the thermals.September 16–20: Day and dark find balance.September 21–25: Thunder quiets the land.September 26–30: Insects retreat below.October 1–5: Swamp waters recede.October 6–10: Maples ignite the ridge.October 11–15: Asters crown the meadows.October 16–20: Crickets sing at dusk.October 21–25: Frost paints the garden.October 26–31: Light rains whisper down.November 1–5: Sweetgum Turns Crimson.November 6–10: Camellia Blooms Break Through.November 11–15: Earth Stiffens Underfoot.November 16–20: Bare Limbs Hold the Light.November 21–25: First Frost Grips the High Ground.November 26–30: North Wind Strips the Last Leaves.December 1–5: Darkness Falls Before Dinner.December 6–10: Winter Locks the Land.December 11–15: Wildlife Retreats to Shelter.December 16–20: Ice Edges Deepen Inward.December 21–25: The Sun Begins its Return.December 26–31: The Year Turns in Silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · August 1–5

Dusk arrives one minute earlier each night

Sunset slides back toward 8 PM; darkness creeps in, signaling summer's decline though heat persists.

Day 214 of 365 · Wedge 43 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
Marchlettuce, peas, spinach, radishes—
Aprillettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash—
Maytomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
July—tomatoes, beans, summer squash
August—tomatoes, beans, summer squash
September—tomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
Novemberfall brassicas, garlic (overwinter), carrots—
December——

A year in weather

Knoxville peaks at about 77°F in July and bottoms near 37°F in January; December brings the heaviest rain (4.9 inches) and October the least (2.4 inches).

MonthMean tempPrecipRainy days
January37°4.6″16
February40°4.1″15
March48°4.8″17
April57°4.0″16
May65°3.5″17
June74°3.8″17
July77°4.5″22
August76°4.4″22
September71°2.7″14
October60°2.4″10
November48°3.7″13
December40°4.9″16

Regional context

In Knoxville, NOAA NCEI 1991-2020 normals put January near 37°F and July near 77°F — a 41°F seasonal arc — with about 47.5 inches of precipitation over 197 rainy or snowy days.

Rainfall in Knoxville stays even across the calendar: December tops out at 4.9 inches over 16.2 rainy days, and October still logs 2.4 inches across 9.8 — a narrow range for Knoxville. That even rhythm groups Knoxville with places like Powell, TN, Halls, TN and John Sevier, TN.

Once Knoxville passes mid-March, overnight freezes fade and peas, lettuce, spinach, and radishes can be sown. Knoxville's heat-lovers — tomatoes, peppers, squash — hold off until Knoxville's frost risk clears, 10-14 days on. Frost returns to Knoxville near mid-December, ending the tender-crop season. Knoxville's low ground holds frost later into spring than Knoxville's benches, which run 3-5 days ahead.

Similar climates: Powell, TN, Halls, TN, John Sevier, TN, Karns, TN, Rockford, TN.

Naturalist notes

Late April brings the emergence of mayapple colonies across Tennessee woodlands, their umbrella-shaped leaves unfurling in shaded forest floors.

Wood thrushes return to Knoxville's deciduous forests by early May, their flute-like songs echoing through the canopy during evening hours.

Frequently asked

When does it freeze in Knoxville?
Knoxville's last spring frost lands near mid-March, and in Knoxville the first fall frost follows around mid-December.
What is the rainy season in Knoxville?
Knoxville sees its heaviest rain in December (around 4.9 inches), part of roughly 48 inches a year.
What is the warmest month in Knoxville?
July is Knoxville's warmest month, averaging about 77°F.
What is the coldest month in Knoxville?
Knoxville bottoms out in January, with a mean near 37°F.
When can I start a vegetable garden in Knoxville?
Time tomatoes in Knoxville for two weeks after mid-March; peas and greens start at Knoxville's frost line.
How many rainy days does Knoxville get?
Expect roughly 197 wet days a year in Knoxville.
What hardiness zone is Knoxville?
Knoxville's USDA zone comes from its January mean (37°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Knoxville?
Knoxville's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
Will it rain this week in Knoxville?
See this week's day-by-day rain chances for Knoxville in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Knoxville?
Current conditions for Knoxville and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Knoxville forecast updated?
The Knoxville forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Knoxville?
Today's sunrise and sunset times for Knoxville are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
How accurate is the weather forecast for Knoxville?
The next few days in Knoxville's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Knoxville, Tennessee occupies a humid subtropical zone, with January means near 37°F and July around 77°F — a 40°F swing.

Yearly precipitation in Knoxville totals around 48 inches, spread over about 197 days of rain or snow.

The 40°F gap between Knoxville's summer and winter, at 36.0°N, shapes Knoxville's frost calendar.

All cities in Tennessee →

Nashville, TN weather →

ZIP codes in Knoxville

  • 37909
  • 37902
  • 37924
  • 37920
  • 37921
  • 37922
  • 37923
  • 37929
  • 37919
  • 37918
  • 37915
  • 37914
  • 37917
  • 37916
  • 37912
  • 37901
  • 37927
  • 37928
  • 37939
  • 37950
  • 37995
  • 37996
  • 37997

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.