Climateby Month

Chattanooga, TN climate by month

NOAA 1991-2020 normals · 676 ft elevation

Summers in Chattanooga are hot and oppressively humid; winters are chilly. Highs peak at 91°F in July and fall to 51°F in January. Wet days are spread through the year, from about 8 to 12 a month. Normal snowfall is about 3.6 in a year. The most comfortable time to visit is April and October.

Warmest month
91°F
July normal high
Coldest month
32°F
January normal low
Wet days a year
123
55.0 in of precipitation
Snow a year
3.6 in
normal snowfall

How warm is Chattanooga?

Normal highs range from 51°F in January to 91°F in July.

20°40°60°80°100° January: normal high 51°F (11°C), low 32°F (0°C) 51° 32° February: normal high 56°F (13°C), low 36°F (2°C) March: normal high 64°F (18°C), low 42°F (6°C) April: normal high 74°F (23°C), low 50°F (10°C) May: normal high 81°F (27°C), low 59°F (15°C) June: normal high 88°F (31°C), low 67°F (19°C) July: normal high 91°F (33°C), low 71°F (22°C) 91° 71° August: normal high 90°F (32°C), low 70°F (21°C) September: normal high 84°F (29°C), low 64°F (18°C) October: normal high 74°F (23°C), low 51°F (11°C) November: normal high 62°F (17°C), low 40°F (4°C) December: normal high 53°F (12°C), low 35°F (2°C) JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is Chattanooga?

July has the most wet days (about 12); the year brings about 55 in of precipitation.

January: 11 wet days February: 11 wet days March: 11 wet days April: 10 wet days May: 11 wet days June: 11 wet days July: 12 wet days 12 August: 9 wet days September: 8 wet days 8 October: 8 wet days November: 9 wet days December: 11 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 3.6 in a year, most of it in February.

January: 1.0 in of snow February: 1.2 in of snow 1.2 March: 1.1 in of snow April: 0.0 in of snow 0.0 May: 0.0 in of snow June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 0.0 in of snow December: 0.3 in of snow JFMAMJJASOND

How humid is Chattanooga?

Muggy days peak in July, at about 26 days.

January: 0 muggy days 0 February: 0 muggy days March: 0 muggy days April: 0 muggy days May: 6 muggy days June: 19 muggy days July: 26 muggy days 26 August: 25 muggy days September: 11 muggy days October: 2 muggy days November: 0 muggy days December: 0 muggy days JFMAMJJASOND

Muggy day: daily mean dew point of 65°F or higher, from hourly observations 1991-2020 at Lovell Field Airport, 6.3 mi E of the city center.

How much daylight?

Daylight ranges from about 9.8 hours in December to 14.5 hours in June.

January: 10.1 hours of daylight February: 10.9 hours of daylight March: 12.0 hours of daylight April: 13.1 hours of daylight May: 14.0 hours of daylight June: 14.5 hours of daylight 14.5 July: 14.2 hours of daylight August: 13.4 hours of daylight September: 12.4 hours of daylight October: 11.3 hours of daylight November: 10.3 hours of daylight December: 9.8 hours of daylight 9.8 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for Chattanooga, 1991-2020
MonthHighLowPrecip.Wet daysSnowMuggy daysDaylight
January 51°F32°F 5.0 in11 1.0 in 0 10.1 h
February 56°F36°F 5.0 in11 1.2 in 0 10.9 h
March 64°F42°F 5.3 in11 1.1 in 0 12.0 h
April 74°F50°F 4.9 in10 0.0 in 0 13.1 h
May 81°F59°F 3.9 in11 0.0 in 6 14.0 h
June 88°F67°F 4.2 in11 0.0 in 19 14.5 h
July 91°F71°F 5.1 in12 0.0 in 26 14.2 h
August 90°F70°F 3.7 in9 0.0 in 25 13.4 h
September 84°F64°F 4.2 in8 0.0 in 11 12.4 h
October 74°F51°F 3.6 in8 0.0 in 2 11.3 h
November 62°F40°F 4.8 in9 0.0 in 0 10.3 h
December 53°F35°F 5.3 in11 0.3 in 0 9.8 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit Chattanooga

By our comfort score, the best months are April and October.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 43375
Feb 51673
Mar 631480
Apr 701680
May 61973
Jun 461812
Jul 400819
Aug 400617
Sep 51557
Oct 681650
Nov 581160
Dec 43383

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. How the score works.

Frost dates in Chattanooga

The last spring frost typically comes around Mar 24, and the first fall frost around Nov 9, leaving 230 frost-free days in a typical year.

Frost and freeze dates for Chattanooga
Typical date1 year in 10
Last spring frost (32°F)Mar 24after Apr 8
First fall frost (32°F)Nov 9before Oct 27
Last hard freeze (28°F)Mar 11after Mar 30
First hard freeze (28°F)Nov 22before Nov 6
Frost-free season230 daysunder 210 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: Chattanooga Lovell Airport (USW00013882), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Tennessee.

Hottest and coldest readings, 1991-2020

The highest reading was 107°F (June 30, 2012); the lowest was 2°F (January 19, 1994).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near Chattanooga

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth, frost dates and humidity and wind by hour: Chattanooga Lovell Airport (USW00013882), 6.2 mi E of the city center, 671 ft . NOAA normals and daily records, 1991-2020.
  • Daily humidity and wind: Lovell Field Airport (723240-13882), 6.3 mi E of the city center, 669 ft . Hourly observations, 1991-2020.
  • Not available for this location: cloud cover (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error