Signal Mountain, Tennessee Weather
Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Signal Mountain weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast21%—86°71°—
- MondayJul 6Heavy Drizzle79%0.03″79°69°-7°
- TuesdayJul 7Light Drizzle32%—89°67°+10°
- WednesdayJul 8Overcast15%—91°64°+2°
- ThursdayJul 9Partly Cloudy13%—92°64°+1°
- FridayJul 10Light Drizzle55%—84°67°-8°
- SaturdayJul 11T-storm w/ Hail53%0.05″81°67°-3°
AQI 51 (Moderate), driven by PM2.5. AQI down 21 over the last 6 hours — air quality is improving sharply. PM2.5 at 19.6 µg/m³ (AQI 71) with a 0.97 fine-to-coarse ratio and 6 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
PM × Wind × Precip
PM2.5 at 19.6 µg/m³ (AQI 71) with a 0.97 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.97
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:55 PM
- Moonset
- 11:55 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Signal Mountain at a glance
- Today vs. normal: 75°F — typical for the season
- Last frost: March 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 37377
15-Day Forecast — Signal Mountain
- Sun86°71°21%
- Mon79°69°79%
- Tue89°67°32%
- Wed91°64°15%
- Thu92°64°13%
- Fri84°67°55%
- Sat81°67°53%
- Sun69°63°32%
- Mon80°62°18%
- Tue87°62°13%
- Wed90°63°18%
- Thu76°65°49%
- Fri89°64°39%
- Sat85°67°48%
- Sun92°68°48%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Peak growing season
As of July 5, 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 — Signal Mountain
SPC has placed Signal Mountain in the Marginal Risk category for severe thunderstorms tomorrow.
- TODAYTSTMGeneral Thunderstorms
- 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 Signal Mountain
- 37377
- 37422