Record envelope, standing records and threshold days for Chattanooga (USC00341706), Oklahoma, United States, with 122 years of record.
Key Facts for Chattanooga
Chattanooga (USC00341706) is a weather station in Oklahoma, United States at 34.42 latitude and -98.65 longitude, 350 m (1,148 ft) above sea level.
The station reports from 1905 to 2026, 122 years of record.
1,464 records set at Chattanooga still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Chattanooga set a monthly record daily precipitation of 124.2 mm (4.9 in) on 6 June 2026.
About the Station
Location: Oklahoma, United States, 34.42 latitude, -98.65 longitude.
Elevation: 350 m (1,148 ft).
Period of record: 1905 to 2026, 122 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Chattanooga. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Chattanooga, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
32.2 C (90.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Feb
33.3 C (91.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Mar
37.2 C (99.0 F)
-15.6 C (3.9 F)
n/a
n/a
Apr
39.4 C (102.9 F)
-6.7 C (19.9 F)
n/a
n/a
May
43.9 C (111.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jun
46.7 C (116.1 F)
6.7 C (44.1 F)
n/a
n/a
Jul
45.6 C (114.1 F)
10.0 C (50.0 F)
n/a
n/a
Aug
46.1 C (115.0 F)
8.3 C (46.9 F)
n/a
n/a
Sep
45.0 C (113.0 F)
1.1 C (34.0 F)
n/a
n/a
Oct
40.6 C (105.1 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-12.2 C (10.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Chattanooga still stand. 1911 holds the most, with 35.
Standing records at Chattanooga by the year they were set
Year set
Standing records
1906
11
1907
28
1908
18
1909
20
1910
13
1911
35
1912
21
1913
20
1914
18
1915
21
1916
11
1917
31
1918
27
1919
18
1920
16
1921
21
1922
12
1923
15
1924
15
1925
18
1926
12
1927
15
1928
6
1929
14
1930
25
1931
15
1932
16
1933
15
1934
22
1935
10
1936
20
1937
8
1938
15
1939
18
1940
16
1941
8
1942
7
1943
16
1944
13
1945
13
1946
9
1947
18
1948
8
1949
5
1950
22
1951
24
1952
21
1953
16
1954
24
1955
14
1956
19
1957
12
1958
6
1959
8
1960
13
1961
12
1962
16
1963
9
1964
13
1965
19
1966
21
1967
14
1968
9
1969
11
1970
13
1971
13
1972
12
1973
7
1974
17
1975
15
1976
8
1977
6
1978
10
1979
16
1980
17
1981
8
1982
7
1983
16
1984
16
1985
9
1986
16
1987
2
1988
5
1989
17
1990
12
1991
9
1992
7
1993
8
1994
8
1995
8
1996
21
1997
9
1998
16
1999
4
2000
22
2001
10
2002
10
2003
15
2004
8
2005
9
2006
19
2007
8
2008
10
2009
5
All-Time Record Progression
8 new records
8 all-time records were set at Chattanooga between 19 July 1936 and 27 June 1994. Each dot is a new record.
When Chattanooga set new all-time records
Date
Kind
Detail
1936-07-19
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
1937-08-01
Record high minimum temperature
Record high minimum temperature 30.0 C (86.0 F)
1947-01-04
Record low minimum temperature
Record low minimum temperature -27.2 C (-17.0 F)
1954-01-21
Record low maximum temperature
Record low maximum temperature -11.1 C (12.0 F)
1964-08-06
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
1988-01-07
Record daily snowfall
Record daily snowfall 22.9 cm (9.0 in)
1989-12-22
Record low maximum temperature
Record low maximum temperature -12.2 C (10.0 F)
1994-06-27
Record high maximum temperature
Record high maximum temperature 46.7 C (116.1 F)
Wettest Day of Each Month
Sep: 170.2 mm (6.7 in)
The wettest day on record for each calendar month at Chattanooga. The most was 170.2 mm (6.7 in) on 14 September 1925.
Record daily precipitation for each month at Chattanooga
Month
Record daily precipitation (mm)
Date
Jan
50.8 mm (2.0 in)
31 January 1923
Feb
53.1 mm (2.1 in)
23 February 1985
Mar
67.3 mm (2.6 in)
23 March 2000
Apr
114.8 mm (4.5 in)
30 April 2025
May
162.8 mm (6.4 in)
17 May 1951
Jun
124.2 mm (4.9 in)
6 June 2026
Jul
152.4 mm (6.0 in)
20 July 1931
Aug
127.0 mm (5.0 in)
19 August 2007
Sep
170.2 mm (6.7 in)
14 September 1925
Oct
114.3 mm (4.5 in)
18 October 1960
Nov
76.2 mm (3.0 in)
29 November 1909
Dec
101.6 mm (4.0 in)
9 December 1911
Period of Record Coverage
1905 to 2009
Complete yearUnder 90 percent of days
105 years of record at Chattanooga, 1905 to 2009. 7 years have data for under 90 percent of days and are left out of rankings: 1905, 1923, 1928, 1932, 1947, 1992, 2009.
Cooler than the station meanWarmer than the station mean
One stripe for each of 87 complete years at Chattanooga, 1907 to 2008. Blue stripes are years cooler than the station's own mean of 16.9 C (62.3 F); red stripes are warmer. The coolest year was 1912, at 15.3 C (59.5 F), and the warmest was 1939, at 18.4 C (65.2 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Chattanooga as warming stripes, 1907 to 2008
Year
Annual mean temperature
Difference from the station mean
1907
16.9 C
+0.07 C
1908
17.2 C
+0.30 C
1909
16.9 C
+0.08 C
1910
17.0 C
+0.17 C
1912
15.3 C
-1.59 C
1913
15.4 C
-1.45 C
1914
16.5 C
-0.34 C
1915
15.8 C
-1.02 C
1916
16.7 C
-0.18 C
1917
16.7 C
-0.13 C
1918
16.8 C
-0.01 C
1920
16.2 C
-0.64 C
1922
17.3 C
+0.48 C
1924
16.2 C
-0.64 C
1925
17.2 C
+0.37 C
1926
16.3 C
-0.56 C
1929
16.5 C
-0.36 C
1930
17.3 C
+0.42 C
1931
17.2 C
+0.34 C
1933
18.1 C
+1.26 C
1934
18.3 C
+1.40 C
1935
17.0 C
+0.18 C
1936
17.2 C
+0.30 C
1938
18.2 C
+1.39 C
1939
18.4 C
+1.57 C
1940
16.5 C
-0.31 C
1941
16.5 C
-0.33 C
1942
16.6 C
-0.25 C
1943
17.2 C
+0.33 C
1944
17.2 C
+0.31 C
1945
16.4 C
-0.43 C
1946
17.5 C
+0.64 C
1948
17.0 C
+0.11 C
1949
16.0 C
-0.89 C
1950
16.6 C
-0.27 C
1951
17.1 C
+0.25 C
1952
17.5 C
+0.65 C
1953
17.5 C
+0.63 C
1954
18.0 C
+1.11 C
1957
16.5 C
-0.32 C
1958
16.3 C
-0.51 C
1959
16.7 C
-0.20 C
1960
16.2 C
-0.70 C
1961
16.0 C
-0.90 C
1962
16.5 C
-0.31 C
1963
17.7 C
+0.89 C
1964
17.2 C
+0.35 C
1965
17.4 C
+0.52 C
1966
16.5 C
-0.38 C
1967
17.4 C
+0.51 C
1969
16.8 C
-0.01 C
1970
17.0 C
+0.13 C
1971
17.2 C
+0.32 C
1972
16.9 C
+0.07 C
1973
16.4 C
-0.42 C
1974
17.0 C
+0.16 C
1975
16.1 C
-0.71 C
1976
16.5 C
-0.38 C
1977
17.5 C
+0.66 C
1978
16.6 C
-0.26 C
1979
16.0 C
-0.87 C
1980
17.7 C
+0.89 C
1981
17.6 C
+0.79 C
1982
16.8 C
-0.05 C
1983
16.5 C
-0.39 C
1984
17.5 C
+0.66 C
1986
17.5 C
+0.61 C
1987
16.8 C
-0.08 C
1988
16.7 C
-0.19 C
1989
16.4 C
-0.44 C
1990
17.4 C
+0.56 C
1991
17.1 C
+0.28 C
1993
16.5 C
-0.32 C
1994
17.3 C
+0.40 C
1995
17.1 C
+0.26 C
1996
17.3 C
+0.47 C
1997
16.7 C
-0.14 C
1998
17.7 C
+0.89 C
1999
17.1 C
+0.20 C
2001
16.6 C
-0.27 C
2002
15.6 C
-1.25 C
2003
16.0 C
-0.90 C
2004
16.3 C
-0.56 C
2005
16.3 C
-0.51 C
2006
17.4 C
+0.59 C
2007
15.9 C
-0.94 C
2008
15.8 C
-1.06 C
The fitted trend in annual mean temperature here over 1907 to 2008 is -0.01 C (-0.05 to 0.04) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.01 F (-0.09 to 0.07) per decade. The slope is a straight line fitted to 87 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Chattanooga
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.01 C (-0.05 to 0.04) per decade
-0.01 F (-0.09 to 0.07) per decade
1907 to 2008
87
Not clearly different from zero
Mean daily maximum
0.02 C (-0.05 to 0.08) per decade
0.03 F (-0.09 to 0.14) per decade
1907 to 2008
87
Not clearly different from zero
Mean daily minimum
-0.03 C (-0.07 to 0.02) per decade
-0.05 F (-0.13 to 0.04) per decade
1907 to 2008
87
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1905 to 2026
Yearly extremes at Chattanooga: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.7 C (116.1 F)
1994
42.2 C (108.0 F)
105
Coldest night (TNn)
-27.2 C (-17.0 F)
1947
-14.4 C (6.1 F)
105
Wettest day (Rx1day)
170.2 mm (6.7 in)
1925
71.1 mm (2.8 in)
111
Wettest five days (Rx5day)
267.7 mm (10.5 in)
1983
106.1 mm (4.2 in)
110
Longest dry spell (CDD)
90 days
1950
38 days
111
Hottest day (TXx)
The hottest day of the year at Chattanooga, 1905 to 2026. The record is 46.7 C (116.1 F) in 1994, marked on the chart; the median year is 42.2 C (108.0 F).
Hottest day (TXx) at Chattanooga by year
Year
Hottest day (TXx)
1905
26.7 C (80.1 F)
1906
37.2 C (99.0 F)
1907
39.4 C (102.9 F)
1908
38.9 C (102.0 F)
1909
40.0 C (104.0 F)
1910
43.9 C (111.0 F)
1911
43.3 C (109.9 F)
1912
38.9 C (102.0 F)
1913
39.4 C (102.9 F)
1914
45.0 C (113.0 F)
1915
38.9 C (102.0 F)
1916
40.6 C (105.1 F)
1917
42.2 C (108.0 F)
1918
41.1 C (106.0 F)
1919
41.1 C (106.0 F)
1920
37.8 C (100.0 F)
1921
41.1 C (106.0 F)
1922
42.8 C (109.0 F)
1923
42.8 C (109.0 F)
1924
42.8 C (109.0 F)
1925
43.3 C (109.9 F)
1926
40.6 C (105.1 F)
1927
41.1 C (106.0 F)
1928
40.6 C (105.1 F)
1929
42.2 C (108.0 F)
1930
42.8 C (109.0 F)
1931
41.7 C (107.1 F)
1932
40.0 C (104.0 F)
1933
43.3 C (109.9 F)
1934
42.8 C (109.0 F)
1935
42.8 C (109.0 F)
1936
45.6 C (114.1 F)
1937
43.9 C (111.0 F)
1938
40.0 C (104.0 F)
1939
42.8 C (109.0 F)
1940
41.1 C (106.0 F)
1941
39.4 C (102.9 F)
1942
40.0 C (104.0 F)
1943
45.6 C (114.1 F)
1944
43.3 C (109.9 F)
1945
41.1 C (106.0 F)
1946
43.9 C (111.0 F)
1947
43.9 C (111.0 F)
1948
41.1 C (106.0 F)
1949
40.6 C (105.1 F)
1950
37.2 C (99.0 F)
1951
43.9 C (111.0 F)
1952
43.3 C (109.9 F)
1953
44.4 C (111.9 F)
1954
43.3 C (109.9 F)
1955
40.6 C (105.1 F)
1956
42.8 C (109.0 F)
1957
41.1 C (106.0 F)
1958
42.2 C (108.0 F)
1959
40.6 C (105.1 F)
1960
39.4 C (102.9 F)
1961
40.6 C (105.1 F)
1962
43.9 C (111.0 F)
1963
42.8 C (109.0 F)
1964
46.1 C (115.0 F)
1965
40.6 C (105.1 F)
1966
42.2 C (108.0 F)
1967
41.7 C (107.1 F)
1968
40.0 C (104.0 F)
1969
42.2 C (108.0 F)
1970
43.9 C (111.0 F)
1971
42.2 C (108.0 F)
1972
45.0 C (113.0 F)
1973
40.6 C (105.1 F)
1974
44.4 C (111.9 F)
1975
38.9 C (102.0 F)
1976
42.2 C (108.0 F)
1977
42.2 C (108.0 F)
1978
42.8 C (109.0 F)
1979
40.6 C (105.1 F)
1980
45.6 C (114.1 F)
1981
43.3 C (109.9 F)
1982
42.2 C (108.0 F)
1983
42.8 C (109.0 F)
1984
43.3 C (109.9 F)
1985
41.7 C (107.1 F)
1986
43.3 C (109.9 F)
1987
39.4 C (102.9 F)
1988
42.8 C (109.0 F)
1989
40.0 C (104.0 F)
1990
42.2 C (108.0 F)
1991
41.1 C (106.0 F)
1992
38.3 C (100.9 F)
1993
41.7 C (107.1 F)
1994
46.7 C (116.1 F)
1995
42.2 C (108.0 F)
1996
45.0 C (113.0 F)
1997
40.0 C (104.0 F)
1998
44.4 C (111.9 F)
1999
42.8 C (109.0 F)
2000
45.0 C (113.0 F)
2001
42.8 C (109.0 F)
2002
39.4 C (102.9 F)
2003
42.2 C (108.0 F)
2004
40.0 C (104.0 F)
2005
39.4 C (102.9 F)
2006
42.8 C (109.0 F)
2007
39.4 C (102.9 F)
2008
42.8 C (109.0 F)
2009
28.3 C (82.9 F)
2010
n/a
2011
n/a
2012
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Chattanooga, 1905 to 2026. The record is -27.2 C (-17.0 F) in 1947, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Chattanooga by year
Year
Coldest night (TNn)
1905
-6.7 C (19.9 F)
1906
-10.6 C (12.9 F)
1907
-10.6 C (12.9 F)
1908
-12.2 C (10.0 F)
1909
-16.1 C (3.0 F)
1910
-14.4 C (6.1 F)
1911
-14.4 C (6.1 F)
1912
-21.1 C (-6.0 F)
1913
-13.3 C (8.1 F)
1914
-16.7 C (1.9 F)
1915
-12.2 C (10.0 F)
1916
-16.1 C (3.0 F)
1917
-14.4 C (6.1 F)
1918
-17.8 C (0.0 F)
1919
-15.0 C (5.0 F)
1920
-13.3 C (8.1 F)
1921
-12.2 C (10.0 F)
1922
-13.9 C (7.0 F)
1923
-11.7 C (10.9 F)
1924
-16.7 C (1.9 F)
1925
-12.8 C (9.0 F)
1926
-12.2 C (10.0 F)
1927
-13.9 C (7.0 F)
1928
-3.9 C (25.0 F)
1929
-14.4 C (6.1 F)
1930
-21.7 C (-7.1 F)
1931
-8.3 C (17.1 F)
1932
-12.2 C (10.0 F)
1933
-18.9 C (-2.0 F)
1934
-9.4 C (15.1 F)
1935
-16.1 C (3.0 F)
1936
-15.6 C (3.9 F)
1937
-12.2 C (10.0 F)
1938
-10.0 C (14.0 F)
1939
-10.6 C (12.9 F)
1940
-16.1 C (3.0 F)
1941
-7.8 C (18.0 F)
1942
-15.6 C (3.9 F)
1943
-16.7 C (1.9 F)
1944
-11.7 C (10.9 F)
1945
-12.8 C (9.0 F)
1946
-12.8 C (9.0 F)
1947
-27.2 C (-17.0 F)
1948
-12.8 C (9.0 F)
1949
-14.4 C (6.1 F)
1950
-15.6 C (3.9 F)
1951
-20.6 C (-5.1 F)
1952
-9.4 C (15.1 F)
1953
-11.7 C (10.9 F)
1954
-16.7 C (1.9 F)
1955
-10.6 C (12.9 F)
1956
-12.2 C (10.0 F)
1957
-11.7 C (10.9 F)
1958
-15.0 C (5.0 F)
1959
-17.8 C (0.0 F)
1960
-15.0 C (5.0 F)
1961
-13.3 C (8.1 F)
1962
-20.6 C (-5.1 F)
1963
-17.2 C (1.0 F)
1964
-16.7 C (1.9 F)
1965
-12.8 C (9.0 F)
1966
-22.8 C (-9.0 F)
1967
-13.9 C (7.0 F)
1968
-14.4 C (6.1 F)
1969
-12.8 C (9.0 F)
1970
-13.3 C (8.1 F)
1971
-16.7 C (1.9 F)
1972
-14.4 C (6.1 F)
1973
-18.9 C (-2.0 F)
1974
-12.8 C (9.0 F)
1975
-14.4 C (6.1 F)
1976
-14.4 C (6.1 F)
1977
-21.1 C (-6.0 F)
1978
-16.7 C (1.9 F)
1979
-16.1 C (3.0 F)
1980
-16.1 C (3.0 F)
1981
-15.0 C (5.0 F)
1982
-16.7 C (1.9 F)
1983
-17.8 C (0.0 F)
1984
-15.6 C (3.9 F)
1985
-20.0 C (-4.0 F)
1986
-17.2 C (1.0 F)
1987
-12.8 C (9.0 F)
1988
-22.8 C (-9.0 F)
1989
-25.0 C (-13.0 F)
1990
-15.0 C (5.0 F)
1991
-8.3 C (17.1 F)
1992
-8.3 C (17.1 F)
1993
-11.1 C (12.0 F)
1994
-12.2 C (10.0 F)
1995
-10.6 C (12.9 F)
1996
-18.9 C (-2.0 F)
1997
-12.8 C (9.0 F)
1998
-11.7 C (10.9 F)
1999
-11.7 C (10.9 F)
2000
-10.6 C (12.9 F)
2001
-10.6 C (12.9 F)
2002
-15.0 C (5.0 F)
2003
-10.6 C (12.9 F)
2004
-13.9 C (7.0 F)
2005
-15.6 C (3.9 F)
2006
-13.9 C (7.0 F)
2007
-10.6 C (12.9 F)
2008
-12.2 C (10.0 F)
2009
-14.4 C (6.1 F)
2010
n/a
2011
n/a
2012
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Chattanooga, 1905 to 2026. The record is 170.2 mm (6.7 in) in 1925, marked on the chart; the median year is 71.1 mm (2.8 in).
Wettest day (Rx1day) at Chattanooga by year
Year
Wettest day (Rx1day)
1905
2.3 mm (0.09 in)
1906
50.8 mm (2.0 in)
1907
82.6 mm (3.3 in)
1908
118.1 mm (4.6 in)
1909
108.0 mm (4.3 in)
1910
39.4 mm (1.6 in)
1911
101.6 mm (4.0 in)
1912
82.3 mm (3.2 in)
1913
81.3 mm (3.2 in)
1914
76.2 mm (3.0 in)
1915
82.6 mm (3.3 in)
1916
61.0 mm (2.4 in)
1917
33.0 mm (1.3 in)
1918
76.2 mm (3.0 in)
1919
99.1 mm (3.9 in)
1920
81.3 mm (3.2 in)
1921
39.9 mm (1.6 in)
1922
76.2 mm (3.0 in)
1923
71.1 mm (2.8 in)
1924
55.9 mm (2.2 in)
1925
170.2 mm (6.7 in)
1926
81.3 mm (3.2 in)
1927
58.4 mm (2.3 in)
1928
50.8 mm (2.0 in)
1929
78.7 mm (3.1 in)
1930
101.6 mm (4.0 in)
1931
152.4 mm (6.0 in)
1932
121.2 mm (4.8 in)
1933
50.8 mm (2.0 in)
1934
52.3 mm (2.1 in)
1935
57.2 mm (2.3 in)
1936
64.3 mm (2.5 in)
1937
59.4 mm (2.3 in)
1938
45.7 mm (1.8 in)
1939
47.0 mm (1.9 in)
1940
45.7 mm (1.8 in)
1941
60.5 mm (2.4 in)
1942
59.2 mm (2.3 in)
1943
52.1 mm (2.1 in)
1944
52.8 mm (2.1 in)
1945
81.3 mm (3.2 in)
1946
42.7 mm (1.7 in)
1947
71.9 mm (2.8 in)
1948
105.2 mm (4.1 in)
1949
123.2 mm (4.9 in)
1950
77.7 mm (3.1 in)
1951
162.8 mm (6.4 in)
1952
157.5 mm (6.2 in)
1953
97.3 mm (3.8 in)
1954
61.0 mm (2.4 in)
1955
82.6 mm (3.3 in)
1956
42.9 mm (1.7 in)
1957
61.7 mm (2.4 in)
1958
61.0 mm (2.4 in)
1959
70.4 mm (2.8 in)
1960
114.3 mm (4.5 in)
1961
68.6 mm (2.7 in)
1962
80.3 mm (3.2 in)
1963
61.5 mm (2.4 in)
1964
45.7 mm (1.8 in)
1965
63.5 mm (2.5 in)
1966
81.3 mm (3.2 in)
1967
53.3 mm (2.1 in)
1968
59.2 mm (2.3 in)
1969
160.8 mm (6.3 in)
1970
61.5 mm (2.4 in)
1971
51.1 mm (2.0 in)
1972
93.7 mm (3.7 in)
1973
135.9 mm (5.4 in)
1974
99.3 mm (3.9 in)
1975
49.5 mm (1.9 in)
1976
67.6 mm (2.7 in)
1977
61.0 mm (2.4 in)
1978
83.1 mm (3.3 in)
1979
133.9 mm (5.3 in)
1980
69.9 mm (2.8 in)
1981
47.2 mm (1.9 in)
1982
93.7 mm (3.7 in)
1983
108.2 mm (4.3 in)
1984
76.5 mm (3.0 in)
1985
105.2 mm (4.1 in)
1986
98.0 mm (3.9 in)
1987
130.8 mm (5.1 in)
1988
55.9 mm (2.2 in)
1989
113.5 mm (4.5 in)
1990
57.7 mm (2.3 in)
1991
100.8 mm (4.0 in)
1992
61.5 mm (2.4 in)
1993
94.5 mm (3.7 in)
1994
84.3 mm (3.3 in)
1995
78.0 mm (3.1 in)
1996
70.9 mm (2.8 in)
1997
47.0 mm (1.9 in)
1998
57.4 mm (2.3 in)
1999
46.5 mm (1.8 in)
2000
67.3 mm (2.6 in)
2001
50.8 mm (2.0 in)
2002
72.9 mm (2.9 in)
2003
72.6 mm (2.9 in)
2004
46.2 mm (1.8 in)
2005
42.7 mm (1.7 in)
2006
78.7 mm (3.1 in)
2007
127.0 mm (5.0 in)
2008
101.1 mm (4.0 in)
2009
64.8 mm (2.6 in)
2010
69.6 mm (2.7 in)
2011
100.3 mm (3.9 in)
2012
17.8 mm (0.7 in)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
34.3 mm (1.4 in)
2025
114.8 mm (4.5 in)
2026
124.2 mm (4.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Chattanooga, 1905 to 2026. The record is 267.7 mm (10.5 in) in 1983, marked on the chart; the median year is 106.1 mm (4.2 in).
Wettest five days (Rx5day) at Chattanooga by year
Year
Wettest five days (Rx5day)
1905
2.6 mm (0.10 in)
1906
136.2 mm (5.4 in)
1907
143.6 mm (5.7 in)
1908
237.5 mm (9.4 in)
1909
119.4 mm (4.7 in)
1910
47.8 mm (1.9 in)
1911
106.7 mm (4.2 in)
1912
124.2 mm (4.9 in)
1913
92.7 mm (3.6 in)
1914
88.1 mm (3.5 in)
1915
133.1 mm (5.2 in)
1916
61.0 mm (2.4 in)
1917
48.0 mm (1.9 in)
1918
94.0 mm (3.7 in)
1919
215.2 mm (8.5 in)
1920
113.3 mm (4.5 in)
1921
68.6 mm (2.7 in)
1922
93.7 mm (3.7 in)
1923
117.9 mm (4.6 in)
1924
64.3 mm (2.5 in)
1925
229.1 mm (9.0 in)
1926
92.7 mm (3.6 in)
1927
75.4 mm (3.0 in)
1928
73.1 mm (2.9 in)
1929
137.4 mm (5.4 in)
1930
112.5 mm (4.4 in)
1931
184.9 mm (7.3 in)
1932
131.4 mm (5.2 in)
1933
69.1 mm (2.7 in)
1934
68.6 mm (2.7 in)
1935
69.1 mm (2.7 in)
1936
89.2 mm (3.5 in)
1937
114.9 mm (4.5 in)
1938
126.5 mm (5.0 in)
1939
58.9 mm (2.3 in)
1940
63.0 mm (2.5 in)
1941
103.9 mm (4.1 in)
1942
80.6 mm (3.2 in)
1943
92.4 mm (3.6 in)
1944
76.9 mm (3.0 in)
1945
210.4 mm (8.3 in)
1946
124.5 mm (4.9 in)
1947
112.0 mm (4.4 in)
1948
105.2 mm (4.1 in)
1949
166.4 mm (6.6 in)
1950
102.4 mm (4.0 in)
1951
213.1 mm (8.4 in)
1952
157.5 mm (6.2 in)
1953
151.6 mm (6.0 in)
1954
122.0 mm (4.8 in)
1955
131.0 mm (5.2 in)
1956
76.4 mm (3.0 in)
1957
92.7 mm (3.6 in)
1958
110.8 mm (4.4 in)
1959
100.8 mm (4.0 in)
1960
145.5 mm (5.7 in)
1961
95.3 mm (3.8 in)
1962
111.8 mm (4.4 in)
1963
78.0 mm (3.1 in)
1964
76.2 mm (3.0 in)
1965
89.2 mm (3.5 in)
1966
124.5 mm (4.9 in)
1967
89.6 mm (3.5 in)
1968
101.8 mm (4.0 in)
1969
167.2 mm (6.6 in)
1970
80.3 mm (3.2 in)
1971
112.5 mm (4.4 in)
1972
145.3 mm (5.7 in)
1973
175.0 mm (6.9 in)
1974
130.0 mm (5.1 in)
1975
85.6 mm (3.4 in)
1976
108.2 mm (4.3 in)
1977
63.3 mm (2.5 in)
1978
131.6 mm (5.2 in)
1979
143.3 mm (5.6 in)
1980
69.9 mm (2.8 in)
1981
91.7 mm (3.6 in)
1982
120.7 mm (4.8 in)
1983
267.7 mm (10.5 in)
1984
83.4 mm (3.3 in)
1985
138.0 mm (5.4 in)
1986
129.9 mm (5.1 in)
1987
208.3 mm (8.2 in)
1988
102.3 mm (4.0 in)
1989
177.5 mm (7.0 in)
1990
93.1 mm (3.7 in)
1991
146.3 mm (5.8 in)
1992
124.8 mm (4.9 in)
1993
101.6 mm (4.0 in)
1994
91.2 mm (3.6 in)
1995
130.0 mm (5.1 in)
1996
167.2 mm (6.6 in)
1997
66.9 mm (2.6 in)
1998
91.5 mm (3.6 in)
1999
63.9 mm (2.5 in)
2000
186.2 mm (7.3 in)
2001
56.1 mm (2.2 in)
2002
84.6 mm (3.3 in)
2003
101.6 mm (4.0 in)
2004
87.9 mm (3.5 in)
2005
75.6 mm (3.0 in)
2006
124.9 mm (4.9 in)
2007
174.5 mm (6.9 in)
2008
228.1 mm (9.0 in)
2009
115.1 mm (4.5 in)
2010
105.4 mm (4.1 in)
2011
100.3 mm (3.9 in)
2012
17.8 mm (0.7 in)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
236.7 mm (9.3 in)
2026
124.2 mm (4.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Chattanooga, 1905 to 2026. The record is 90 days in 1950, marked on the chart; the median year is 38 days.
Longest dry spell (CDD) at Chattanooga by year
Year
Longest dry spell (CDD)
1905
19 days
1906
42 days
1907
48 days
1908
35 days
1909
43 days
1910
41 days
1911
32 days
1912
43 days
1913
44 days
1914
48 days
1915
29 days
1916
52 days
1917
38 days
1918
55 days
1919
28 days
1920
36 days
1921
73 days
1922
49 days
1923
28 days
1924
41 days
1925
33 days
1926
52 days
1927
33 days
1928
22 days
1929
52 days
1930
38 days
1931
55 days
1932
34 days
1933
30 days
1934
45 days
1935
35 days
1936
84 days
1937
31 days
1938
44 days
1939
42 days
1940
41 days
1941
24 days
1942
27 days
1943
44 days
1944
35 days
1945
52 days
1946
36 days
1947
40 days
1948
35 days
1949
38 days
1950
90 days
1951
37 days
1952
47 days
1953
30 days
1954
38 days
1955
56 days
1956
56 days
1957
32 days
1958
32 days
1959
53 days
1960
24 days
1961
26 days
1962
27 days
1963
46 days
1964
41 days
1965
43 days
1966
53 days
1967
30 days
1968
17 days
1969
36 days
1970
52 days
1971
31 days
1972
40 days
1973
34 days
1974
37 days
1975
33 days
1976
35 days
1977
53 days
1978
39 days
1979
24 days
1980
59 days
1981
31 days
1982
25 days
1983
39 days
1984
28 days
1985
26 days
1986
33 days
1987
39 days
1988
33 days
1989
44 days
1990
39 days
1991
55 days
1992
47 days
1993
23 days
1994
42 days
1995
45 days
1996
54 days
1997
36 days
1998
33 days
1999
62 days
2000
56 days
2001
43 days
2002
28 days
2003
31 days
2004
25 days
2005
54 days
2006
33 days
2007
34 days
2008
74 days
2009
33 days
2010
31 days
2011
73 days
2012
13 days
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
1 day
2025
27 days
2026
70 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
87 years with a frost
Across 87 years with a frost, the median last spring frost at Chattanooga falls on 6 April and the median first autumn frost on 3 November, which leaves a median of 211 days between them.
In 1976 to 2008 the median growing season was 212 days. That is 4 days more than in 1907 to 1944.
Fitted over all years, the growing season changes by +1.0 days per decade at this station.
Frost dates and growing season at Chattanooga
Measure
Median, all years
Earliest period (1907 to 1944)
Recent period (1976 to 2008)
Recent against earliest
Fitted trend
Last spring frost
6 April
9 April
6 April
3 days earlier
-0.3 days per decade
First autumn frost
3 November
3 November
4 November
1 day later
+0.7 days per decade
Growing days
211 days
208 days
212 days
4 days more
+1.0 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
100 years, 1906 to 2011
A day with at least 72.2 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 186.8 mm (7.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Chattanooga: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
72.2 mm (2.8 in)
5 years
98.8 mm (3.9 in)
10 years
118.0 mm (4.6 in)
25 years
144.0 mm (5.7 in)
50 years
164.8 mm (6.5 in)
100 years
186.8 mm (7.4 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 100 years of values from 1906 to 2011.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 170.2 mm (6.7 in) in 1925; 162.8 mm (6.4 in) in 1951; 160.8 mm (6.3 in) in 1969.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Chattanooga standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chattanooga threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.