Annual mean 16°C · wettest around February · prevailing wind W
Warmest
30.3 °C
Coldest
7.4 °C
Wettest
42%
Windiest
4.0 m/s
Prevailing
W
3.1 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Chattanooga over the whole year is 16°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 2°C. Chattanooga has no sharply defined rainy season: the chance of rain on a given day runs from 33% in September, the driest month, to 41% in February, the wettest. Winds in Chattanooga are highest in March, averaging 2.6 m/s (9 km/h), and lightest in August, at 1.5 m/s (5 km/h). The prevailing wind is from the W. The clearest skies in Chattanooga come in July, when the sky is typically 42% covered; February is the cloudiest month, at 59%.
Month by month Chattanooga climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
8°C
2°C
4°C
37%
57%
2.4 m/s
9
0
32
February
12°C
5°C
8°C
41%
59%
2.5 m/s
22
0
52
March
16°C
8°C
12°C
37%
52%
2.6 m/s
40
1
69
April
20°C
11°C
17°C
35%
47%
2.4 m/s
63
14
66
May
25°C
16°C
24°C
35%
49%
2.0 m/s
63
45
35
June
28°C
20°C
30°C
37%
45%
1.8 m/s
30
60
7
July
30°C
22°C
33°C
35%
42%
1.6 m/s
7
48
1
August
29°C
21°C
32°C
35%
46%
1.5 m/s
13
54
2
September
28°C
18°C
28°C
33%
43%
1.5 m/s
38
59
16
October
22°C
12°C
21°C
33%
43%
1.7 m/s
66
26
56
November
15°C
6°C
12°C
34%
45%
1.8 m/s
37
4
67
December
10°C
4°C
7°C
39%
58%
2.1 m/s
15
0
48
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Chattanooga weather by season
Year round, Chattanooga has days of about 8°C at their warmest in January, its coolest month, and 30°C in July, its warmest; the coolest hours of the day run from 2°C to 22°C through the year, and the average temperature over the year is 16°C around the clock. Rain is most likely around February and least likely around September. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Chattanooga weather in winterDecember to February
High 10°CLow 4°CRain 39%
Winter in Chattanooga has typical daily highs of about 10°C and lows of about 4°C, with a 39% chance of rain on a given day.
Chattanooga weather in springMarch to May
High 20°CLow 12°CRain 36%
Spring in Chattanooga has typical daily highs of about 20°C and lows of about 12°C, with a 36% chance of rain on a given day.
Chattanooga weather in summerJune to August
High 29°CLow 21°CRain 36%
Summer in Chattanooga has typical daily highs of about 29°C and lows of about 21°C, with a 36% chance of rain on a given day.
Chattanooga weather in autumnSeptember to November
High 22°CLow 12°CRain 33%
Autumn in Chattanooga has typical daily highs of about 22°C and lows of about 12°C, with a 33% chance of rain on a given day.
When is the rainy season in Chattanooga?
Chattanooga has no sharply defined rainy season: the chance of rain on a given day runs from 33% in September, the driest month, to 41% in February, the wettest.
What time of year is Chattanooga windiest?
Winds in Chattanooga are highest in March, averaging 2.6 m/s (9 km/h), and lightest in August, at 1.5 m/s (5 km/h). The prevailing wind is from the W.
What is the average temperature in Chattanooga year round?
The average temperature in Chattanooga over the whole year is 16°C. July is the hottest month, with highs of about 30°C; January is the coldest, with lows of about 2°C.