Excessive Rainfall in the Southern Plains; Extreme Heat Coming to the Southwest U.S.

Heavy to severe thunderstorms may bring areas of excessive rainfall and flooding over parts of the southern Plains through Friday. A Slight Risk of excessive rainfall has been issued. Dangerously hot temperatures are forecast across parts of southern Arizona and far southeastern California Saturday through Monday. An Extreme Heat Watch has been issued. Read More >

Knoxville Climate Normals and Records
(records began in 1871)

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

**Knoxville Climatological Data**

(1991-2020 normals unless otherwise noted; POR is "Period of Record")
Average Rainfall ..... 51.93"	Avg number of days max >= 90 F (POR)..... 34 days
Average Snowfall..... 4.6"	Avg number of days min <= 32 F (POR)..... 68 days
Median first frost..... October 24th	Median last frost..... April 14th
Median first freeze..... November 2nd	Median last freeze..... April 1st
Thanksgiving average temp (POR)..... 44.8 F	Thanksgiving average rainfall (POR)..... 0.08"
Easter average temp (POR)..... 57.0 F	Easter average rainfall (POR)..... 0.11"

**Knoxville Records**
Highest Temperature	105 F	July 1, 2012
Lowest Temperature	-24 F	January 21, 1985
Highest rainfall total in one day	6.14"	July 16, 1917
Highest rainfall total in one month	17.62"	April 1874
Highest rainfall total in one year	73.77"	1875
Most snow in one day	17.5"	February 13, 1960
Most snow in one month	25.7"	February 1895
Most Snow in one season (Dec - Feb)	41.6"	1894 - 1895
Most snow in one year	56.7"	1959 - 1960
Easter highest rainfall total	3.14"	April 12, 2020
Easter highest snowfall total	6.1"	March 24, 1940
Easter warmest temperature	88 F	April 21, 1946
Easter coldest temperature	23 F	April 8, 2007 & April 1, 1923
Thanksgiving highest rainfall total	1.09"	November 28, 1918
Thanksgiving highest snowfall total	1.3"	November 24, 1938
Thanksgiving warmest temperature	74 F	November 25, 2010 & November 22, 1979
Thanksgiving coldest temperature	17 F	November 27, 1930
Measurable snowfall on Christmas Day	7.0"	1969
	2.5"	2010
	2.2"	1887
	2.0"	1915
	1.2"	1976
	0.6"	1884
	0.4"	2020
	0.4"	1935
	0.4"	1929
	0.3"	1992
	0.3"	1909
	0.3"	1899
	0.1"	1989

Last 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
52.0
51.9
60.4
65.1
74.0
81.4
83.0
83.2
79.7
68.9
56.8
54.1


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



Coldest
26.7
30.5
36.8
51.2
60.9
69.1
71.8
72.0
65.1
52.4
40.2
29.5


 
1940
1895
1960
1907
1917
1903
1967
1875
1918
1917
1872
1876





Wettest/Driest Monthly Precipitation Totals



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


Wettest
16.98
13.08
13.35
17.62
10.98
11.83
13.16
11.33
9.19
9.51
10.36
12.34


 
1882
2019
1917
1874
1974
1928
1917
1920
1989
1925
1948
1901



Driest
0.95
0.56
0.72
0.39
0.71
0.20
0.33
0.77
0.03
0.00
0.17
0.45


 
1986
1898
1910
1976
1941
1944
1995
1954
2019
2000
1890
1965

Warmest/Coldest Monthly Average Temperatures
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Warmest	52.0	51.9	60.4	65.1	74.0	81.4	83.0	83.2	79.7	68.9	56.8	54.1
	1950	1890	2012	2017	1962	1952	1993	2007	1925	1919	1985	1889

Coldest	26.7	30.5	36.8	51.2	60.9	69.1	71.8	72.0	65.1	52.4	40.2	29.5
	1940	1895	1960	1907	1917	1903	1967	1875	1918	1917	1872	1876

Wettest/Driest Monthly Precipitation Totals
	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC
Wettest	16.98	13.08	13.35	17.62	10.98	11.83	13.16	11.33	9.19	9.51	10.36	12.34
	1882	2019	1917	1874	1974	1928	1917	1920	1989	1925	1948	1901

Driest	0.95	0.56	0.72	0.39	0.71	0.20	0.33	0.77	0.03	0.00	0.17	0.45
	1986	1898	1910	1976	1941	1944	1995	1954	2019	2000	1890	1965