Severe Weather and Flooding Threats for the Central U.S.; Dangerous Heat in the Southern and Western U.S.

Severe weather and flooding threats will continue for portions of the central U.S. over the next couple of days, with multiple rounds of thunderstorms expected. Dangerous heat will persist across the southern and western U.S. through mid-week. Hot and dry conditions will fuel fire weather concerns for the Intermountain West, where dry thunderstorms may spark additional wildfires. Read More >

Chattanooga Climate Normals and Records
(records began in 1879)

Note: The following monthly climatological data is not considered official. For copies of official data, contact the National Climatic Data Center. Additional normals data can be found at: https://www.ncdc.noaa.gov/cdo-web/datatools/normals.

Daily and Monthly Climate Normals and Records ('Normals' are thirty year averages based on the period 1991-2020)
Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec

**Chattanooga Climatological Data**

(1991-2020 normals unless otherwise noted; POR is "Period of Record")
Average Rainfall..... 55.00"	Avg number of days max >= 90 F° (POR)..... 46 days
Average Snowfall..... 3.6"	Avg number of days min <= 32 F° (POR)..... 59 days
Median first frost..... October 31st	Median last frost..... April 4th
Median first freeze..... November 9th	Median last freeze..... March 24th
Thanksgiving avg temp (POR).....47.1 F	Thanksgiving avg rainfall (POR)..... 0.09"
Easter averages temp (POR)..... 58.1 F	Easter averages rainfall (POR)..... 0.14"

**Chattanooga Records**
Highest Temperature	107 F	July 1, 2012 & June 30, 2012
Lowest Temperature	-10 F	January 21, 1985 & January 31, 1966 & February 13, 1899
Highest rainfall total in one day	9.49"	September 5, 2011
Highest rainfall total in one month	16.32"	March 31, 1980
Highest rainfall total in one year	73.70"	1994
Most snow in one day	18.5"	March 13, 1993
Most snow in one month	20.0"	March 31, 1993
Most Snow in one season (Dec - Feb)	22.2"	1917-1918
Most snow in one year	22.7"	1992 - 1993
Easter highest rainfall total	3.13"	April 12, 2020
Easter highest snowfall total	1.6"	March 24, 1940
Easter warmest temperature	86 F	April 21, 1946 & March 27, 1910
Easter coldest temperature	26 F	April 1, 1923
Thanksgiving highest rainfall total	1.56"	November 28, 1963
Thanksgiving highest snowfall total	1.1"	November 29, 1883
Thanksgiving warmest temperature	75 F	November 24, 1921
Thanksgiving coldest temperature	20 F	November 27, 1930
Measurable snowfall on Christmas Day	5.1"	1969
	2.5"	2010
	2.5"	1910
	1.2"	1909
	0.3"	1989
	0.1"	1913
	0.1"	1899

Records updated on 6/18/2022 For climate data queries, please visit NOWData at: http://w2.weather.gov/climate/xmacis.php?wfo=mrx Helpful Information: Frost data - search for temperatures at or below 36 degrees Freeze data - search for temperatures at or below 32 degrees




Warmest/Coldest Monthly Average Temperatures



 
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC


Warmest
53.7
53.7
62.9
66.5
75.2
82.2
85.2
85.7
82.8
69.7
58.8
57.5


 
1950
1890
2012
2017
1962
1952
1993
2007
1925
1919
1985
1889



Coldest
28.5
33.8
39.0
53.2
62.6
68.4
72.8
73.5
67.4
54.5
42.7
34.5


 
1977
1958
1960
1907
1917
1974
1967
1992
1967
1917
1976
1917

Warmest/Coldest Monthly Average Temperatures
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Warmest	53.7	53.7	62.9	66.5	75.2	82.2	85.2	85.7	82.8	69.7	58.8	57.5
	1950	1890	2012	2017	1962	1952	1993	2007	1925	1919	1985	1889

Coldest	28.5	33.8	39.0	53.2	62.6	68.4	72.8	73.5	67.4	54.5	42.7	34.5
	1977	1958	1960	1907	1917	1974	1967	1992	1967	1917	1976	1917




Wettest/Driest Monthly Precipitation Totals



 
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC


Wettest
12.67
12.30
16.32
15.29
12.02
9.40
13.49
12.36
14.18
11.91
13.59
13.68


 
1882
1939
1980
1911
2025
1949
1916
1920
1977
1925
1948
1961



Driest
0.90
0.62
0.93
0.44
0.54
0.29
0.20
0.01
0.04
0.08
0.16
0.44


 
1986
1941
1910
1942
1941
1931
1957
2011
1919
2016
1890
1889

Wettest/Driest Monthly Precipitation Totals
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Wettest	12.67	12.30	16.32	15.29	12.02	9.40	13.49	12.36	14.18	11.91	13.59	13.68
	1882	1939	1980	1911	2025	1949	1916	1920	1977	1925	1948	1961

Driest	0.90	0.62	0.93	0.44	0.54	0.29	0.20	0.01	0.04	0.08	0.16	0.44
	1986	1941	1910	1942	1941	1931	1957	2011	1919	2016	1890	1889