Erwin, Tennessee Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Erwin weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast31%—86°70°—
- SundayJul 5Overcast27%—90°72°+4°
- MondayJul 6Thunderstorm81%—88°68°-2°
- TuesdayJul 7Light Showers45%—84°67°-4°
- WednesdayJul 8Light Drizzle15%—84°63°0°
- ThursdayJul 9Overcast24%—87°64°+3°
- FridayJul 10Light Drizzle59%—88°67°+1°
AQI 48 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.5 µg/m³ (AQI 42) with a 0.91 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
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 0.4 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 8 around 1 PM.
- Present
- AQI 34
- UV peak
- 0.4 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 8
PM × Wind × Precip
PM2.5 at 7.5 µg/m³ (AQI 42) with a 0.91 fine-to-coarse ratio and 1 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.91
- Wind
- calm
- 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
- 11:18 PM
- Moonset
- 10:38 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Erwin at a glance
- Today vs. normal: 10°F above the seasonal normal for this latitude
- Last frost: March 24 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 37650
16-Day Forecast — Erwin
- Sat86°70°31%
- Sun90°72°27%
- Mon88°68°81%
- Tue84°67°45%
- Wed84°63°15%
- Thu87°64°24%
- Fri88°67°59%
- Sat78°65°67%
- Sun71°62°51%
- Mon79°58°34%
- Tue83°59°19%
- Wed88°66°59%
- Thu83°66°57%
- Fri89°67°72%
- Sat86°67°81%
- Sun82°65°84%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 4, 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 — Erwin
SPC has placed Erwin in the Marginal Risk category for severe thunderstorms today.
- TODAYMRGLMarginal Risk
- TOMORROWMRGLMarginal Risk
- 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.
ZIP codes in Erwin
- 37650