Weather StoryAlmanac, microseasons, and the day's weather story.

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

Signal Mountain, TN
Saturday, July 4 at 11:32 PM
77
°
Partly Cloudy
Feels like
82°
Humidity
72%
Wind
5 mph
Sunrise
2:32 AM
Sunset
4:59 PM
Signal Mountain, TN
Hour by hour · 24h
24-Hour ForecastSignal Mountain, TN: 24-hour forecast. Temperatures range from 72 to 86 degrees Fahrenheit with a 26% chance of precipitation at 9 PM.
L 72°H 86°
Signal Mountain, TN
7-day forecast
  1. Today
    Jul 4
    Light Drizzle
    11%
    87°69°
  2. Sunday
    Jul 5
    Overcast
    26%
    86°72°-1°
  3. Monday
    Jul 6
    Heavy Drizzle
    79%
    0.03″
    79°69°-7°
  4. Tuesday
    Jul 7
    Light Drizzle
    32%
    89°67°+10°
  5. Wednesday
    Jul 8
    Overcast
    15%
    91°64°+2°
  6. Thursday
    Jul 9
    Partly Cloudy
    13%
    92°64°+1°
  7. Friday
    Jul 10
    Light Drizzle
    55%
    84°67°-8°
Signal Mountain, TN
Anemometer · 24h winds · from true
NESW
From · True
NW
315° · backing 90°
Direction
NW
315°
Sustained
5
mph
Gust
7
mph
Peak 24h
11
avg 4
Beaufort · 2 · LIGHT BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 4 · pk 11 @ 11:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 132SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Signal Mountain, TN
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
955.9
+0.3 mb in 3h · steady · 28.23 inHg
Now
955.9
mb
3h
+0.3
mb
12h
-4.0
mb
24h
-2.0
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 956960
950955960965-21h-18h-15h-12h-9h-6h-3h-24hNOW959.8955.5955.8
−24h−18h−12h−6hnow
Deep low — expect rough seas, strong wind, and persistent rain.
Signal Mountain, TN
Air quality
57
AQI
Moderate
0 in 6h

AQI 57 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 16.4 µg/m³ (AQI 65) with a 0.96 fine-to-coarse ratio and 5 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.

PM 2.5DRIVERModerate
16.4μg/m³
PM 10Good
17μg/m³
NO₂Good
13μg/m³
OzoneGood
56μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 16.4 µg/m³ (AQI 65) with a 0.96 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.96
Wind
light
Recent rain
0h in last 6h
Pattern
stagnant smoke
Signal Mountain, TN
Sky cover · visibility · 24h
Cloud cover
57%
PARTLY CLOUDY
100%0%−24h−18h−12h−6hnow

Visibility
45.1mi
UNLIMITED
65 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
03:32 UTC · Signal Mountain, TN · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
03:32 UTC · Signal Mountain, TN · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Signal Mountain, TN
Satellite · infrared · animated
Signal Mountain, TN
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Signal Mountain, TN
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
6:03 AM
Sunrise
2:32 AM
Daylight
14h 27m
Sunset
4:59 PM
Civil dusk
9:30 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Signal Mountain, TN
The moon
Waning Gibbous
76% illuminated
Moonrise
11:55 PM
Moonset
11:55 AM
In sign
♓︎ Pisces
Signal Mountain, TN
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Signal Mountain at a glance

  • Today vs. normal: 77°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

16-Day Forecast — Signal Mountain

  1. Sat87°69°11%
  2. Sun86°73°26%
  3. Mon79°69°79%
  4. Tue89°67°32%
  5. Wed91°64°15%
  6. Thu92°64°13%
  7. Fri84°67°55%
  8. Sat81°67°53%
  9. Sun69°63°32%
  10. Mon80°62°18%
  11. Tue87°62°13%
  12. Wed90°63°18%
  13. Thu76°65°49%
  14. Fri89°64°39%
  15. Sat85°67°48%
  16. 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

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.