Chattanooga Climate Page

Note: The following monthly climatological data is not considered official. For copies of official data, contact the National Climatic Data Center.

Daily and Monthly Climate Normals and Records ('Normals' are thirty year averages based on the period 1981-2010)
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

Chattanooga Annual Averages
Precipitation.....52.48 inches	Days with 0.01" or more of precipitation.....119.6
Snowfall.....3.9 inches	Days with 1.0" or more of snowfall.....1
Days with thunderstorms.....54.8	Days at or above 90 F.....47.7
Days with dense fog.....27.3	Days at or below 32 F.....58.3
Average first freeze.....November 4	Average last freeze.....April 1
Average first frost.....October 20	Average last frost.....April 14

Chattanooga All-Time Records
All Time Highest Temperature	107 F	June 30 and July 1, 2012
All Time Lowest Temperature	-10 F	January 21, 1985
Most Rain in One Hour	2.70"	July 27, 1976
Most Rain in 24 Hours	9.50"	September 5-6, 2011
Most Rain in One Month	16.32"	March 1980
Most Rain in One Year	73.70"	1994
Most Snow in 24 Hours	20"	March 12-13, 1993
Most Snow in One Season	23.9"	1894-95
Snowfall on Christmas	2.5"	2010
	Trace	2002
	Trace	1993
	0.2"	1989
	Trace	1976
	Trace	1970
	5.1"	1969
	Trace	1962
	Trace	1961
	Trace	1956
	Trace	1953
	Trace	1935
	Trace	1915
	0.1"	1913
	1.2"	1902
	0.1"	1899
	Trace	1879
Strongest Wind Gust	56 MPH	June 1987

Warmest/Coldest Monthly Average Temperatures
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Warmest	53.7	54.0	62.9	65.6	75.2	82.2	85.2	85.7	82.8	69.6	58.8	57.2
	1950	1890	2012	1954	1962	1952	1993	2007	1925	1919	1985	1889
Coldest	28.5	33.8	39.0	53.3	62.6	68.4	72.8	73.5	67.4	54.6	42.7	34.3
	1977	1895	1960	1907	1917	1974	1967	1992	1918	1917	1976	1917

Wettest/Driest Monthly Precipitation Totals
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Wettest	14.74	12.30	16.32	15.29	12.00	9.40	13.49	12.36	14.18	11.91	13.59	13.68
	1882	1939	1980	1911	1929	1949	1916	1920	1977	1925	1948	1961
Driest	0.90	0.62	0.42	0.44	0.54	0.29	0.20	0.01	0.04	0.08	0.16	0.44
	1986	1941	2012	1942	1941	1931	1957	2011	1919	1938	1890	1889

National Weather Service Weather Forecast Office