Chattanooga Wb City Weather Records (USW00053875)
Record envelope, standing records and threshold days for Chattanooga Wb City (USW00053875), Tennessee, United States, with 72 years of record.
Key Facts for Chattanooga Wb City
- Chattanooga Wb City (USW00053875) is a weather station in Tennessee, United States at 35.07 latitude and -85.30 longitude, 209 m (685 ft) above sea level.
- The station reports from 1879 to 1950, 72 years of record.
- 1,464 records set at Chattanooga Wb City still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Chattanooga Wb City set a daily record low maximum temperature of 0.6 C (33.1 F) on 28 November 1950.
About the Station
- Location: Tennessee, United States, 35.07 latitude, -85.30 longitude.
- Elevation: 209 m (685 ft).
- Period of record: 1879 to 1950, 72 years.
- Eligible elements: tmax, tmin, prcp, snow.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 26.1 C (79.0 F) | -21.7 C (-7.1 F) | n/a | n/a |
| Feb | 26.1 C (79.0 F) | -23.3 C (-9.9 F) | n/a | n/a |
| Mar | 31.7 C (89.1 F) | -16.7 C (1.9 F) | n/a | n/a |
| Apr | 33.3 C (91.9 F) | -3.9 C (25.0 F) | n/a | n/a |
| May | 35.0 C (95.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 13.3 C (55.9 F) | n/a | n/a |
| Aug | 40.0 C (104.0 F) | 12.2 C (54.0 F) | n/a | n/a |
| Sep | 40.0 C (104.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Oct | 33.3 C (91.9 F) | -3.3 C (26.1 F) | n/a | n/a |
| Nov | 28.3 C (82.9 F) | -14.4 C (6.1 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -16.1 C (3.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1879 | 45 |
| 1880 | 25 |
| 1881 | 27 |
| 1882 | 19 |
| 1883 | 13 |
| 1884 | 24 |
| 1885 | 20 |
| 1886 | 30 |
| 1887 | 31 |
| 1888 | 16 |
| 1889 | 35 |
| 1890 | 30 |
| 1891 | 24 |
| 1892 | 15 |
| 1893 | 17 |
| 1894 | 30 |
| 1895 | 27 |
| 1896 | 27 |
| 1897 | 21 |
| 1898 | 23 |
| 1899 | 34 |
| 1900 | 19 |
| 1901 | 34 |
| 1902 | 26 |
| 1903 | 23 |
| 1904 | 13 |
| 1905 | 18 |
| 1906 | 15 |
| 1907 | 34 |
| 1908 | 8 |
| 1909 | 18 |
| 1910 | 19 |
| 1911 | 24 |
| 1912 | 15 |
| 1913 | 25 |
| 1914 | 19 |
| 1915 | 12 |
| 1916 | 16 |
| 1917 | 36 |
| 1918 | 21 |
| 1919 | 17 |
| 1920 | 14 |
| 1921 | 21 |
| 1922 | 13 |
| 1923 | 14 |
| 1924 | 17 |
| 1925 | 46 |
| 1926 | 14 |
| 1927 | 34 |
| 1928 | 15 |
| 1929 | 21 |
| 1930 | 18 |
| 1931 | 24 |
| 1932 | 20 |
| 1933 | 19 |
| 1934 | 22 |
| 1935 | 28 |
| 1936 | 46 |
| 1937 | 22 |
| 1938 | 9 |
| 1939 | 21 |
| 1940 | 25 |
| 1948 | 6 |
| 1949 | 19 |
| 1950 | 31 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1911-04-04 | Record daily precipitation | Record daily precipitation 152.1 mm (6.0 in) |
| 1925-09-04 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 1925-09-05 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
Wettest Day of Each Month
Apr: 152.1 mm (6.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 104.6 mm (4.1 in) | 5 January 1949 |
| Feb | 81.0 mm (3.2 in) | 7 February 1884 |
| Mar | 130.8 mm (5.1 in) | 30 March 1886 |
| Apr | 152.1 mm (6.0 in) | 4 April 1911 |
| May | 88.1 mm (3.5 in) | 30 May 1903 |
| Jun | 82.6 mm (3.3 in) | 16 June 1949 |
| Jul | 122.9 mm (4.8 in) | 8 July 1916 |
| Aug | 81.5 mm (3.2 in) | 5 August 1908 |
| Sep | 109.2 mm (4.3 in) | 2 September 1898 |
| Oct | 102.6 mm (4.0 in) | 16 October 1932 |
| Nov | 76.2 mm (3.0 in) | 22 November 1883 |
| Dec | 77.5 mm (3.1 in) | 6 December 1908 |
Period of Record Coverage
1879 to 1950| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1879 | 357 | 98% | Yes |
| 1880 | 363 | 99% | Yes |
| 1881 | 365 | 100% | Yes |
| 1882 | 364 | 100% | Yes |
| 1883 | 365 | 100% | Yes |
| 1884 | 366 | 100% | Yes |
| 1885 | 364 | 100% | Yes |
| 1886 | 365 | 100% | Yes |
| 1887 | 365 | 100% | Yes |
| 1888 | 364 | 99% | Yes |
| 1889 | 360 | 99% | Yes |
| 1890 | 357 | 98% | Yes |
| 1891 | 355 | 97% | Yes |
| 1892 | 361 | 99% | Yes |
| 1893 | 362 | 99% | Yes |
| 1894 | 362 | 99% | Yes |
| 1895 | 356 | 98% | Yes |
| 1896 | 363 | 99% | Yes |
| 1897 | 365 | 100% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 365 | 100% | Yes |
| 1900 | 365 | 100% | Yes |
| 1901 | 365 | 100% | Yes |
| 1902 | 365 | 100% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 366 | 100% | Yes |
| 1905 | 365 | 100% | Yes |
| 1906 | 365 | 100% | Yes |
| 1907 | 364 | 100% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 365 | 100% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 365 | 100% | Yes |
| 1915 | 365 | 100% | Yes |
| 1916 | 366 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 365 | 100% | Yes |
| 1924 | 365 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 365 | 100% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 182 | 50% | No |
| 1948 | 120 | 33% | No |
| 1949 | 364 | 100% | Yes |
| 1950 | 362 | 99% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 November 1950 | Chattanooga Wb City, US | daily low max | 0.6 C (33.1 F) | 1.6 C (2.9 F) | 51 years | 24 of 100 (Routine) |
| 26 November 1950 | Chattanooga Wb City, US | daily low min | -7.2 C (19.0 F) | 1.6 C (2.9 F) | 51 years | 25 of 100 (Routine) |
| 26 November 1950 | Chattanooga Wb City, US | daily low max | 0.6 C (33.1 F) | 1.6 C (2.9 F) | 13 years | 13 of 100 (Routine) |
| 25 November 1950 | Chattanooga Wb City, US | monthly low max | -7.2 C (19.0 F) | 4.4 C (7.9 F) | 13 years | 28 of 100 (Routine) |
| 25 November 1950 | Chattanooga Wb City, US | monthly low min | -14.4 C (6.1 F) | 2.7 C (4.9 F) | 20 years | 28 of 100 (Routine) |
| 25 November 1950 | Chattanooga Wb City, US | daily snowfall | 5.8 cm (2.3 in) | 5.5 cm (2.2 in) | 20 years | 24 of 100 (Routine) |
| 24 November 1950 | Chattanooga Wb City, US | daily low min | -10.6 C (12.9 F) | 5.0 C (9.0 F) | 57 years | 33 of 100 (Routine) |
| 24 November 1950 | Chattanooga Wb City, US | daily snowfall | 1.5 cm (0.6 in) | 1.2 cm (0.5 in) | 39 years | 20 of 100 (Routine) |
| 31 October 1950 | Chattanooga Wb City, US | daily high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 12 years | 12 of 100 (Routine) |
| 21 October 1950 | Chattanooga Wb City, US | daily high min | 18.3 C (64.9 F) | 2.2 C (4.0 F) | 31 years | 20 of 100 (Routine) |
| 20 October 1950 | Chattanooga Wb City, US | daily high min | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 66 years | 29 of 100 (Routine) |
| 20 October 1950 | Chattanooga Wb City, US | daily rain | 38.6 mm (1.5 in) | 10.9 mm (0.4 in) | 15 years | 18 of 100 (Routine) |
| 15 October 1950 | Chattanooga Wb City, US | daily high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 68 years | 29 of 100 (Routine) |
| 8 September 1950 | Chattanooga Wb City, US | daily rain | 100.1 mm (3.9 in) | 70.6 mm (2.8 in) | 65 years | 66 of 100 (Major) |
| 2 September 1950 | Chattanooga Wb City, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 17 years | 3 of 100 (Routine) |
| 30 August 1950 | Chattanooga Wb City, US | daily rain | 39.1 mm (1.5 in) | 9.6 mm (0.38 in) | 50 years | 30 of 100 (Routine) |
| 25 August 1950 | Chattanooga Wb City, US | daily low max | 24.4 C (75.9 F) | 0.6 C (1.1 F) | 24 years | 16 of 100 (Routine) |
| 15 July 1950 | Chattanooga Wb City, US | daily low max | 23.3 C (73.9 F) | 1.7 C (3.1 F) | 52 years | 27 of 100 (Routine) |
| 26 June 1950 | Chattanooga Wb City, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 20 years | 15 of 100 (Routine) |
| 19 June 1950 | Chattanooga Wb City, US | daily high min | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 66 years | 29 of 100 (Routine) |
Climate Trend
63 complete years, 1879 to 1950| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1879 | 16.2 C | +0.18 C |
| 1880 | 16.1 C | +0.12 C |
| 1881 | 16.3 C | +0.33 C |
| 1882 | 16.2 C | +0.20 C |
| 1883 | 16.4 C | +0.38 C |
| 1884 | 15.8 C | -0.19 C |
| 1885 | 14.7 C | -1.30 C |
| 1886 | 14.5 C | -1.47 C |
| 1887 | 16.0 C | +0.01 C |
| 1888 | 15.8 C | -0.17 C |
| 1889 | 15.8 C | -0.22 C |
| 1890 | 16.9 C | +0.88 C |
| 1891 | 15.9 C | -0.10 C |
| 1892 | 15.2 C | -0.80 C |
| 1893 | 15.6 C | -0.40 C |
| 1894 | 16.2 C | +0.17 C |
| 1895 | 14.8 C | -1.21 C |
| 1896 | 16.4 C | +0.41 C |
| 1897 | 16.1 C | +0.14 C |
| 1898 | 15.9 C | -0.13 C |
| 1899 | 15.7 C | -0.25 C |
| 1900 | 16.1 C | +0.08 C |
| 1901 | 14.6 C | -1.35 C |
| 1902 | 15.7 C | -0.27 C |
| 1903 | 15.0 C | -0.95 C |
| 1904 | 15.0 C | -0.95 C |
| 1905 | 15.4 C | -0.55 C |
| 1906 | 15.9 C | -0.14 C |
| 1907 | 16.0 C | +0.01 C |
| 1908 | 16.2 C | +0.25 C |
| 1909 | 16.0 C | +0.03 C |
| 1910 | 15.3 C | -0.65 C |
| 1911 | 16.8 C | +0.76 C |
| 1912 | 15.0 C | -1.00 C |
| 1913 | 16.2 C | +0.25 C |
| 1914 | 15.6 C | -0.38 C |
| 1915 | 15.8 C | -0.19 C |
| 1916 | 15.8 C | -0.22 C |
| 1917 | 14.5 C | -1.53 C |
| 1918 | 16.0 C | +0.03 C |
| 1919 | 16.2 C | +0.25 C |
| 1920 | 15.0 C | -0.99 C |
| 1921 | 17.1 C | +1.11 C |
| 1922 | 16.6 C | +0.62 C |
| 1923 | 15.9 C | -0.09 C |
| 1924 | 15.0 C | -1.04 C |
| 1925 | 16.9 C | +0.86 C |
| 1926 | 15.5 C | -0.46 C |
| 1927 | 16.8 C | +0.84 C |
| 1928 | 15.3 C | -0.65 C |
| 1929 | 15.7 C | -0.32 C |
| 1930 | 16.0 C | +0.00 C |
| 1931 | 16.9 C | +0.94 C |
| 1932 | 16.4 C | +0.44 C |
| 1933 | 17.0 C | +0.96 C |
| 1934 | 16.6 C | +0.65 C |
| 1935 | 16.9 C | +0.86 C |
| 1936 | 17.0 C | +1.00 C |
| 1937 | 16.5 C | +0.48 C |
| 1938 | 17.3 C | +1.28 C |
| 1939 | 17.2 C | +1.17 C |
| 1949 | 17.5 C | +1.47 C |
| 1950 | 16.6 C | +0.56 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1879 to 1950. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1879 to 1950 | 63 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1879 to 1950 | 63 | Rise |
| Mean daily minimum | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.1 to 0.4) per decade | 1879 to 1950 | 63 | Rise |
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
1879 to 1950| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1925 | 36.1 C (97.0 F) | 65 |
| Coldest night (TNn) | -23.3 C (-9.9 F) | 1899 | -12.2 C (10.0 F) | 65 |
| Wettest day (Rx1day) | 152.1 mm (6.0 in) | 1911 | 73.7 mm (2.9 in) | 65 |
| Wettest five days (Rx5day) | 273.5 mm (10.8 in) | 1916 | 120.5 mm (4.7 in) | 65 |
| Longest dry spell (CDD) | 41 days | 1931 | 20 days | 65 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1879 | 38.3 C (100.9 F) |
| 1880 | 35.0 C (95.0 F) |
| 1881 | 37.8 C (100.0 F) |
| 1882 | 34.4 C (93.9 F) |
| 1883 | 36.1 C (97.0 F) |
| 1884 | 33.3 C (91.9 F) |
| 1885 | 35.6 C (96.1 F) |
| 1886 | 36.1 C (97.0 F) |
| 1887 | 37.2 C (99.0 F) |
| 1888 | 36.7 C (98.1 F) |
| 1889 | 33.3 C (91.9 F) |
| 1890 | 35.0 C (95.0 F) |
| 1891 | 35.6 C (96.1 F) |
| 1892 | 35.0 C (95.0 F) |
| 1893 | 36.7 C (98.1 F) |
| 1894 | 36.7 C (98.1 F) |
| 1895 | 36.1 C (97.0 F) |
| 1896 | 36.7 C (98.1 F) |
| 1897 | 36.7 C (98.1 F) |
| 1898 | 36.1 C (97.0 F) |
| 1899 | 36.7 C (98.1 F) |
| 1900 | 36.7 C (98.1 F) |
| 1901 | 37.8 C (100.0 F) |
| 1902 | 38.3 C (100.9 F) |
| 1903 | 34.4 C (93.9 F) |
| 1904 | 35.0 C (95.0 F) |
| 1905 | 35.0 C (95.0 F) |
| 1906 | 34.4 C (93.9 F) |
| 1907 | 35.6 C (96.1 F) |
| 1908 | 35.0 C (95.0 F) |
| 1909 | 35.0 C (95.0 F) |
| 1910 | 33.3 C (91.9 F) |
| 1911 | 36.1 C (97.0 F) |
| 1912 | 34.4 C (93.9 F) |
| 1913 | 36.7 C (98.1 F) |
| 1914 | 36.7 C (98.1 F) |
| 1915 | 36.1 C (97.0 F) |
| 1916 | 34.4 C (93.9 F) |
| 1917 | 35.6 C (96.1 F) |
| 1918 | 36.1 C (97.0 F) |
| 1919 | 36.7 C (98.1 F) |
| 1920 | 33.9 C (93.0 F) |
| 1921 | 36.7 C (98.1 F) |
| 1922 | 35.0 C (95.0 F) |
| 1923 | 33.9 C (93.0 F) |
| 1924 | 37.8 C (100.0 F) |
| 1925 | 40.0 C (104.0 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 36.7 C (98.1 F) |
| 1928 | 34.4 C (93.9 F) |
| 1929 | 34.4 C (93.9 F) |
| 1930 | 40.0 C (104.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 36.1 C (97.0 F) |
| 1933 | 37.8 C (100.0 F) |
| 1934 | 40.0 C (104.0 F) |
| 1935 | 40.0 C (104.0 F) |
| 1936 | 39.4 C (102.9 F) |
| 1937 | 37.2 C (99.0 F) |
| 1938 | 36.1 C (97.0 F) |
| 1939 | 36.7 C (98.1 F) |
| 1940 | 35.0 C (95.0 F) |
| 1948 | 33.3 C (91.9 F) |
| 1949 | 36.7 C (98.1 F) |
| 1950 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1879 | -11.1 C (12.0 F) |
| 1880 | -16.1 C (3.0 F) |
| 1881 | -10.6 C (12.9 F) |
| 1882 | -11.1 C (12.0 F) |
| 1883 | -10.0 C (14.0 F) |
| 1884 | -18.3 C (-0.9 F) |
| 1885 | -14.4 C (6.1 F) |
| 1886 | -21.7 C (-7.1 F) |
| 1887 | -13.9 C (7.0 F) |
| 1888 | -12.2 C (10.0 F) |
| 1889 | -10.6 C (12.9 F) |
| 1890 | -9.4 C (15.1 F) |
| 1891 | -7.8 C (18.0 F) |
| 1892 | -11.1 C (12.0 F) |
| 1893 | -15.0 C (5.0 F) |
| 1894 | -15.0 C (5.0 F) |
| 1895 | -18.9 C (-2.0 F) |
| 1896 | -13.3 C (8.1 F) |
| 1897 | -14.4 C (6.1 F) |
| 1898 | -11.1 C (12.0 F) |
| 1899 | -23.3 C (-9.9 F) |
| 1900 | -13.3 C (8.1 F) |
| 1901 | -15.0 C (5.0 F) |
| 1902 | -10.6 C (12.9 F) |
| 1903 | -14.4 C (6.1 F) |
| 1904 | -10.0 C (14.0 F) |
| 1905 | -20.0 C (-4.0 F) |
| 1906 | -8.3 C (17.1 F) |
| 1907 | -7.2 C (19.0 F) |
| 1908 | -10.6 C (12.9 F) |
| 1909 | -14.4 C (6.1 F) |
| 1910 | -10.6 C (12.9 F) |
| 1911 | -12.2 C (10.0 F) |
| 1912 | -16.1 C (3.0 F) |
| 1913 | -7.8 C (18.0 F) |
| 1914 | -14.4 C (6.1 F) |
| 1915 | -5.6 C (21.9 F) |
| 1916 | -11.1 C (12.0 F) |
| 1917 | -15.6 C (3.9 F) |
| 1918 | -18.3 C (-0.9 F) |
| 1919 | -15.6 C (3.9 F) |
| 1920 | -11.1 C (12.0 F) |
| 1921 | -3.9 C (25.0 F) |
| 1922 | -6.7 C (19.9 F) |
| 1923 | -11.1 C (12.0 F) |
| 1924 | -18.3 C (-0.9 F) |
| 1925 | -15.6 C (3.9 F) |
| 1926 | -8.3 C (17.1 F) |
| 1927 | -15.6 C (3.9 F) |
| 1928 | -17.8 C (0.0 F) |
| 1929 | -12.8 C (9.0 F) |
| 1930 | -12.2 C (10.0 F) |
| 1931 | -8.3 C (17.1 F) |
| 1932 | -8.9 C (16.0 F) |
| 1933 | -15.6 C (3.9 F) |
| 1934 | -13.3 C (8.1 F) |
| 1935 | -11.7 C (10.9 F) |
| 1936 | -15.0 C (5.0 F) |
| 1937 | -11.1 C (12.0 F) |
| 1938 | -8.3 C (17.1 F) |
| 1939 | -7.8 C (18.0 F) |
| 1940 | -17.8 C (0.0 F) |
| 1948 | -6.7 C (19.9 F) |
| 1949 | -5.0 C (23.0 F) |
| 1950 | -14.4 C (6.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1879 | 64.5 mm (2.5 in) |
| 1880 | 60.7 mm (2.4 in) |
| 1881 | 73.2 mm (2.9 in) |
| 1882 | 75.9 mm (3.0 in) |
| 1883 | 76.2 mm (3.0 in) |
| 1884 | 81.0 mm (3.2 in) |
| 1885 | 55.9 mm (2.2 in) |
| 1886 | 130.8 mm (5.1 in) |
| 1887 | 88.4 mm (3.5 in) |
| 1888 | 69.6 mm (2.7 in) |
| 1889 | 64.8 mm (2.6 in) |
| 1890 | 47.2 mm (1.9 in) |
| 1891 | 74.7 mm (2.9 in) |
| 1892 | 73.7 mm (2.9 in) |
| 1893 | 69.6 mm (2.7 in) |
| 1894 | 61.2 mm (2.4 in) |
| 1895 | 49.3 mm (1.9 in) |
| 1896 | 54.1 mm (2.1 in) |
| 1897 | 52.6 mm (2.1 in) |
| 1898 | 109.2 mm (4.3 in) |
| 1899 | 104.1 mm (4.1 in) |
| 1900 | 55.4 mm (2.2 in) |
| 1901 | 77.5 mm (3.1 in) |
| 1902 | 45.7 mm (1.8 in) |
| 1903 | 88.1 mm (3.5 in) |
| 1904 | 73.9 mm (2.9 in) |
| 1905 | 53.1 mm (2.1 in) |
| 1906 | 117.1 mm (4.6 in) |
| 1907 | 65.8 mm (2.6 in) |
| 1908 | 81.5 mm (3.2 in) |
| 1909 | 77.2 mm (3.0 in) |
| 1910 | 73.4 mm (2.9 in) |
| 1911 | 152.1 mm (6.0 in) |
| 1912 | 95.0 mm (3.7 in) |
| 1913 | 53.8 mm (2.1 in) |
| 1914 | 78.7 mm (3.1 in) |
| 1915 | 104.6 mm (4.1 in) |
| 1916 | 122.9 mm (4.8 in) |
| 1917 | 47.2 mm (1.9 in) |
| 1918 | 83.6 mm (3.3 in) |
| 1919 | 52.3 mm (2.1 in) |
| 1920 | 115.1 mm (4.5 in) |
| 1921 | 98.0 mm (3.9 in) |
| 1922 | 90.2 mm (3.6 in) |
| 1923 | 56.4 mm (2.2 in) |
| 1924 | 104.1 mm (4.1 in) |
| 1925 | 81.3 mm (3.2 in) |
| 1926 | 73.7 mm (2.9 in) |
| 1927 | 78.0 mm (3.1 in) |
| 1928 | 54.1 mm (2.1 in) |
| 1929 | 67.3 mm (2.6 in) |
| 1930 | 69.1 mm (2.7 in) |
| 1931 | 75.2 mm (3.0 in) |
| 1932 | 102.6 mm (4.0 in) |
| 1933 | 117.1 mm (4.6 in) |
| 1934 | 81.0 mm (3.2 in) |
| 1935 | 62.2 mm (2.4 in) |
| 1936 | 65.3 mm (2.6 in) |
| 1937 | 72.9 mm (2.9 in) |
| 1938 | 55.4 mm (2.2 in) |
| 1939 | 43.9 mm (1.7 in) |
| 1940 | 59.4 mm (2.3 in) |
| 1948 | 47.0 mm (1.9 in) |
| 1949 | 115.8 mm (4.6 in) |
| 1950 | 100.1 mm (3.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1879 | 149.7 mm (5.9 in) |
| 1880 | 162.8 mm (6.4 in) |
| 1881 | 131.0 mm (5.2 in) |
| 1882 | 97.3 mm (3.8 in) |
| 1883 | 135.8 mm (5.3 in) |
| 1884 | 134.9 mm (5.3 in) |
| 1885 | 94.8 mm (3.7 in) |
| 1886 | 262.1 mm (10.3 in) |
| 1887 | 92.7 mm (3.6 in) |
| 1888 | 121.9 mm (4.8 in) |
| 1889 | 125.0 mm (4.9 in) |
| 1890 | 111.0 mm (4.4 in) |
| 1891 | 144.3 mm (5.7 in) |
| 1892 | 136.9 mm (5.4 in) |
| 1893 | 100.6 mm (4.0 in) |
| 1894 | 100.6 mm (4.0 in) |
| 1895 | 85.7 mm (3.4 in) |
| 1896 | 86.7 mm (3.4 in) |
| 1897 | 112.3 mm (4.4 in) |
| 1898 | 118.6 mm (4.7 in) |
| 1899 | 254.2 mm (10.0 in) |
| 1900 | 107.4 mm (4.2 in) |
| 1901 | 136.3 mm (5.4 in) |
| 1902 | 67.4 mm (2.7 in) |
| 1903 | 129.3 mm (5.1 in) |
| 1904 | 79.2 mm (3.1 in) |
| 1905 | 97.3 mm (3.8 in) |
| 1906 | 165.4 mm (6.5 in) |
| 1907 | 65.8 mm (2.6 in) |
| 1908 | 131.4 mm (5.2 in) |
| 1909 | 111.3 mm (4.4 in) |
| 1910 | 89.6 mm (3.5 in) |
| 1911 | 266.6 mm (10.5 in) |
| 1912 | 115.3 mm (4.5 in) |
| 1913 | 92.4 mm (3.6 in) |
| 1914 | 141.6 mm (5.6 in) |
| 1915 | 131.3 mm (5.2 in) |
| 1916 | 273.5 mm (10.8 in) |
| 1917 | 123.7 mm (4.9 in) |
| 1918 | 91.3 mm (3.6 in) |
| 1919 | 83.6 mm (3.3 in) |
| 1920 | 195.5 mm (7.7 in) |
| 1921 | 117.9 mm (4.6 in) |
| 1922 | 120.5 mm (4.7 in) |
| 1923 | 82.4 mm (3.2 in) |
| 1924 | 151.8 mm (6.0 in) |
| 1925 | 131.3 mm (5.2 in) |
| 1926 | 139.2 mm (5.5 in) |
| 1927 | 130.1 mm (5.1 in) |
| 1928 | 120.7 mm (4.8 in) |
| 1929 | 182.5 mm (7.2 in) |
| 1930 | 99.2 mm (3.9 in) |
| 1931 | 115.9 mm (4.6 in) |
| 1932 | 150.3 mm (5.9 in) |
| 1933 | 131.3 mm (5.2 in) |
| 1934 | 115.8 mm (4.6 in) |
| 1935 | 140.6 mm (5.5 in) |
| 1936 | 112.4 mm (4.4 in) |
| 1937 | 143.3 mm (5.6 in) |
| 1938 | 117.6 mm (4.6 in) |
| 1939 | 98.5 mm (3.9 in) |
| 1940 | 87.8 mm (3.5 in) |
| 1948 | 109.2 mm (4.3 in) |
| 1949 | 148.3 mm (5.8 in) |
| 1950 | 115.1 mm (4.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1879 | 23 days |
| 1880 | 11 days |
| 1881 | 13 days |
| 1882 | 15 days |
| 1883 | 17 days |
| 1884 | 26 days |
| 1885 | 15 days |
| 1886 | 23 days |
| 1887 | 26 days |
| 1888 | 20 days |
| 1889 | 22 days |
| 1890 | 16 days |
| 1891 | 22 days |
| 1892 | 16 days |
| 1893 | 17 days |
| 1894 | 17 days |
| 1895 | 19 days |
| 1896 | 17 days |
| 1897 | 29 days |
| 1898 | 21 days |
| 1899 | 18 days |
| 1900 | 16 days |
| 1901 | 22 days |
| 1902 | 22 days |
| 1903 | 21 days |
| 1904 | 28 days |
| 1905 | 17 days |
| 1906 | 23 days |
| 1907 | 18 days |
| 1908 | 18 days |
| 1909 | 25 days |
| 1910 | 27 days |
| 1911 | 18 days |
| 1912 | 20 days |
| 1913 | 23 days |
| 1914 | 24 days |
| 1915 | 23 days |
| 1916 | 20 days |
| 1917 | 20 days |
| 1918 | 16 days |
| 1919 | 34 days |
| 1920 | 39 days |
| 1921 | 20 days |
| 1922 | 15 days |
| 1923 | 22 days |
| 1924 | 26 days |
| 1925 | 25 days |
| 1926 | 14 days |
| 1927 | 20 days |
| 1928 | 17 days |
| 1929 | 23 days |
| 1930 | 26 days |
| 1931 | 41 days |
| 1932 | 16 days |
| 1933 | 15 days |
| 1934 | 13 days |
| 1935 | 39 days |
| 1936 | 24 days |
| 1937 | 13 days |
| 1938 | 23 days |
| 1939 | 25 days |
| 1940 | 13 days |
| 1948 | 17 days |
| 1949 | 12 days |
| 1950 | 17 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
62 years with a frostAcross 62 years with a frost, the median last spring frost at Chattanooga Wb City falls on 24 March and the median first autumn frost on 8 November, which leaves a median of 228 days between them.
In 1911 to 1950 the median growing season was 229 days. That is 1 day more than in 1879 to 1908.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1879 to 1908) | Recent period (1911 to 1950) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 March | 24 March | 21 March | 3 days earlier | +0.2 days per decade |
| First autumn frost | 8 November | 7 November | 12 November | 5 days later | +0.5 days per decade |
| Growing days | 228 days | 228 days | 229 days | 1 day more | +0.3 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
61 years, 1879 to 1939A day with at least 72.7 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 154.7 mm (6.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 72.7 mm (2.9 in) | |
| 5 years | 93.4 mm (3.7 in) | |
| 10 years | 107.6 mm (4.2 in) | |
| 25 years | 126.1 mm (5.0 in) | |
| 50 years | 140.3 mm (5.5 in) | |
| 100 years | 154.7 mm (6.1 in) | Longer than the 61 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 61 years of values from 1879 to 1939.
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: 152.1 mm (6.0 in) in 1911; 130.8 mm (5.1 in) in 1886; 122.9 mm (4.8 in) in 1916.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Chattanooga Wb City, at 1901 and 1934. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1901 ran 0.2 C (0.4 F) lower than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1934 ran 0.5 C (0.9 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1901 | -0.2 | -0.4 | possible | 5 |
| 1934 | +0.5 | +0.9 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).