Johnson City, Tennessee Weather
Dusk arrives one minute earlier each night. Day 43 of summer. Read this microseason across nine climate regions →
Johnson City weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Showers62%1.3″87°70°—
- MondayAug 3Heavy Rain26%0.34″76°67°-11°
- TuesdayAug 4Thunderstorm70%0.01″85°64°+9°
- WednesdayAug 5T-storm w/ Hail78%—79°64°-6°
- ThursdayAug 6Light Drizzle65%0.01″87°65°+8°
- FridayAug 7Thunderstorm62%—85°64°-2°
- SaturdayAug 8Light Drizzle56%—88°66°+3°
AQI 33 (Good), driven by Ozone. AQI down 5 over the last 6 hours (gradual decline). Ozone at AQI 35 now. With UV 4.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 16.
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 35 now. With UV 4.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 16.
- Present
- AQI 35
- UV peak
- 4.8 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 16
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
- 10:11 PM
- Moonset
- 10:32 AM
- In sign
- ♓︎ Pisces
Dusk arrives one minute earlier each night
Johnson City at a glance
- Today vs. normal: 13°F above the seasonal normal for this latitude
- Last frost: March 25 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 37601, 37604, 37614, 37615
16-Day Forecast — Johnson City
- Sun87°70°62%
- Mon76°67°26%
- Tue85°64°70%
- Wed79°64°78%
- Thu87°65°65%
- Fri85°64°62%
- Sat88°66°56%
- Sun88°64°51%
- Mon85°66°36%
- Tue86°67°41%
- Wed89°67°41%
- Thu89°67°65%
- Fri91°68°68%
- Sat82°69°65%
- Sun88°68°59%
- Mon85°69°65%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Johnson City
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 — Johnson City
SPC has placed Johnson 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 Johnson City
Johnson City sits in Washington County, where the year’s longest day runs 14h 38m of daylight and its shortest just 9h 41m — a swing of +4h 58m 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 246 miles to the W. The nearest town Johnson City tracks is Mountain City, roughly 33 miles to the ENE.
ZIP codes in Johnson City
- 37614
- 37615
- 37601
- 37604
- 37602
- 37605
- 37684