Mountain City, Tennessee Weather
Dusk arrives one minute earlier each night. Day 43 of summer. Read this microseason across nine climate regions →
Mountain City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Light Rain56%0.14″81°70°—
- MondayAug 3Light Drizzle40%0.03″77°65°-4°
- TuesdayAug 4Light Showers48%—80°65°+3°
- WednesdayAug 5Thunderstorm70%—78°64°-2°
- ThursdayAug 6Light Drizzle67%—86°64°+8°
- FridayAug 7T-storm w/ Hail69%—81°64°-5°
- SaturdayAug 8Heavy Drizzle64%—89°66°+8°
AQI 35 (Good), driven by Ozone. AQI down 8 over the last 6 hours (gradual decline). Ozone at AQI 34 now. With UV 3.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12.
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 3.7 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 12.
- Present
- AQI 34
- UV peak
- 3.7 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 12
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).
Red sky at night, sailor's delight.
- Moonrise
- 10:09 PM
- Moonset
- 10:30 AM
- In sign
- ♓︎ Pisces
Dusk arrives one minute earlier each night
Mountain City at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: March 26 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP code: 37683
16-Day Forecast — Mountain City
- Sun81°70°64%
- Mon77°65°39%
- Tue80°65°53%
- Wed78°64°69%
- Thu86°64°63%
- Fri81°64°65%
- Sat89°66°67%
- Sun88°66°50%
- Mon86°65°39%
- Tue85°65°35%
- Wed88°66°49%
- Thu89°67°72%
- Fri90°67°77%
- Sat82°68°71%
- Sun89°68°61%
- Mon82°67°61%
Forecast data from Open-Meteo (CC BY 4.0).
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 — Mountain City
SPC has placed Mountain City in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Isolated severe storms possible. Limited threat for hail or damaging wind.
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 Mountain City
Mountain City sits in Johnson County, where the year’s longest day runs 14h 39m of daylight and its shortest just 9h 40m — a swing of +4h 59m 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 278 miles to the W. The nearest town Mountain City tracks is Johnson City, roughly 33 miles to the WSW.
ZIP codes in Mountain City
- 37683