Signal Mountain, Tennessee Weather
Fireflies pulse through the magnolias. Day 77 of spring. Read this microseason across nine climate regions →
Signal Mountain weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Clear——74°55°—
- ThursdayJun 4Clear——77°60°+3°
- FridayJun 5Overcast——78°62°+1°
- SaturdayJun 6Overcast——85°58°+7°
- SundayJun 7Overcast18%—85°63°0°
- MondayJun 8Light Drizzle51%—82°62°-3°
- TuesdayJun 9Light Drizzle41%0.01″76°64°-6°
PM2.5 at 11.9 µg/m³ (AQI 56) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 5 over the last 6 hours (steady decline since this morning).
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 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 7 by mid-afternoon.
- Present
- AQI 31
- UV peak
- 0.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 7
PM × Wind × Precip
PM2.5 at 11.9 µg/m³ (AQI 56) with a 0.95 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.95
- Wind
- light
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 3:55 AM
- Moonset
- 1:57 PM
- In sign
- ♑︎ Capricorn
Fireflies pulse through the magnolias
Signal Mountain at a glance
- Today vs. normal: 15°F below the seasonal normal for this latitude
- Last frost: March 18 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 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.