Signal Mountain, TN 37377 Weather

Hamilton County4:44 AM EDT35.15°N, 85.34°W

Current conditions

Clear
48°
Clear
Feels like 48°
High 68°·Low 46° tonight
WindCalm
Humidity87%
Dew point45°
Pressure30.19 inHg
Visibility10 mi
Cloud cover2%
UV index0 Low
Sunrise7:55 AM
Sunset6:58 PM

Observed at Chattanooga, Lovell Field · 1 hr ago

Forecast

10-day

  • Tonight

    Clear, with a low around 46. Northeast wind around 5 mph, with gusts as high as 20 mph.

  • Friday

    Sunny, with a high near 68. East wind 0 to 5 mph.

  • Friday Night

    Clear, with a low around 47. East wind around 0 mph.

National Weather Service forecast updated 21 hrs ago.

Hourly

Hourly forecast
  1. Now Clear 50°
  2. 5 AM Clear 48°
  3. 6 AM Sunny 48°
  4. 7 AM Sunny 47°
  5. 8 AM Sunny 47°
  6. 9 AM Sunny 48°
  7. 10 AM Sunny 53°
  8. 11 AM Sunny 57°
  9. 12 PM Sunny 60°
  10. 1 PM Sunny 62°
  11. 2 PM Sunny 65°
  12. 3 PM Sunny 67°
  13. 4 PM Sunny 67°
  14. 5 PM Sunny 68°
  15. 6 PM Mostly Clear 65°
  16. 7 PM Clear 61°
  17. 8 PM Clear 58°
  18. 9 PM Clear 54°
  19. 10 PM Clear 52°
  20. 11 PM Clear 52°
  21. Sat12 AM Clear 51°
  22. 1 AM Clear 51°
  23. 2 AM Clear 50°
  24. 3 AM Clear 49°

10-day forecast

Details
  1. ThuOct 22 Sunny Sunny46°70°
  2. TodayOct 23 Sunny Sunny47°68°
  3. SatOct 24 Sunny Sunny46°67°
  4. SunOct 25 Sunny Sunny46°66°
  5. MonOct 26 Sunny Sunny48°67°
  6. TueOct 27 Mostly Sunny Mostly Sunny50°69°
  7. WedOct 28 Mostly Sunny Mostly Sunny48°68°
  8. ThuOct 29 Partly cloudy Partly cloudy51°71°
  9. FriOct 30 Sunny Sunny45°64°
  10. SatOct 31 Cloudy Cloudy43°67°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news in Tennessee

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Air quality

53
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • FriModerate (51)
  • SatModerate (51)

Chattanooga, TN reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:55 AM
Sunset 6:58 PM
Daylight 11 h 2 min (−2 min 3 s tomorrow)
Waxing Gibbous · 91% lit
Moonrise 5:20 PM Moonset 5:10 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low71° / 48°
Record high88° (1941)
Record low28° (1974)
Wettest2.31 in (2007)
Month to date2.71 in (normal 2.57 in)

Chattanooga Area, records since 1879. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in MRX, issued 3 hrs ago

Key Messages

Updated at 139 AM EDT Fri Oct 23 2026

- Early morning patchy fog potential continues near rivers and lakes.

- Dry weather dominates the forecast period, with cool mornings and pleasant afternoons each day. Afternoon relative humidity will remain on the lower side as well.

Discussion

Issued at 139 AM EDT Fri Oct 23 2026

Patchy early morning fog will be possible again today, but it should be mainly near rivers and lakes.

We remain in a persistent pattern of a large upper ridge centered to our west and surface high pressure extending into our area from the north and northeast. This will continue to provide dry weather through the weekend and well into next week. Models generally show at least some suppression of the upper ridge in the mid week time frame with short wave energy moving through the Great Lakes region, but precipitation currently looks likely to remain well to our north with dry weather continuing for our area through next Thursday.

For the entire period we can expect cool nights and pleasant afternoons with high temperatures each day not far off of seasonal normals. We will also see low relative humidity values during the afternoon hours, but light winds will help to mitigate fire weather concerns.

Aviation

(06Z TAFS) Issued at 139 AM EDT Fri Oct 23 2026

VFR under high pressure conditions; mostly SKC; variable or light NWly winds; fog possible at TRI later this morning.

Preliminary Point Temps

Chattanooga Airport, TN 73 46 72 45 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 72 41 72 44 / 0 0 0 0 Oak Ridge, TN 71 41 73 42 / 0 0 0 0 Tri Cities Airport, TN 70 38 69 36 / 0 0 0 0

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.