Record envelope, standing records and threshold days for Loudon 1 E (USC00405451), Tennessee, United States, with 78 years of record.
Key Facts for Loudon 1 E
Loudon 1 E (USC00405451) is a weather station in Tennessee, United States at 35.73 latitude and -84.33 longitude, 244 m (801 ft) above sea level.
The station reports from 1885 to 1962, 78 years of record.
1,464 records set at Loudon 1 E still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Loudon 1 E set a daily record precipitation of 74.7 mm (2.9 in) on 12 June 1962.
About the Station
Location: Tennessee, United States, 35.73 latitude, -84.33 longitude.
Elevation: 244 m (801 ft).
Period of record: 1885 to 1962, 78 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 Loudon 1 E. 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 Loudon 1 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Feb
26.7 C (80.1 F)
-19.4 C (-2.9 F)
n/a
n/a
Mar
31.7 C (89.1 F)
-14.4 C (6.1 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-6.1 C (21.0 F)
n/a
n/a
May
37.2 C (99.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jun
41.1 C (106.0 F)
5.0 C (41.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
7.8 C (46.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
7.2 C (45.0 F)
n/a
n/a
Sep
41.1 C (106.0 F)
-0.6 C (30.9 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-5.6 C (21.9 F)
n/a
n/a
Nov
29.4 C (84.9 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
26.1 C (79.0 F)
-17.8 C (0.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Loudon 1 E still stand. 1925 holds the most, with 57.
Standing records at Loudon 1 E by the year they were set
Year set
Standing records
1913
30
1914
48
1915
28
1916
32
1917
53
1918
33
1919
28
1920
32
1921
24
1922
13
1923
19
1924
38
1925
57
1926
19
1927
46
1928
37
1929
35
1930
42
1931
45
1932
27
1933
29
1934
32
1935
45
1936
53
1937
31
1938
25
1939
31
1940
44
1941
28
1942
26
1943
23
1944
28
1945
14
1946
20
1947
19
1948
34
1949
14
1950
35
1951
29
1952
23
1953
15
1954
28
1955
33
1956
19
1957
13
1958
14
1959
9
1960
24
1961
32
1962
8
Wettest Day of Each Month
Mar: 142.5 mm (5.6 in)
The wettest day on record for each calendar month at Loudon 1 E. The most was 142.5 mm (5.6 in) on 30 March 1886.
Record daily precipitation for each month at Loudon 1 E
Month
Record daily precipitation (mm)
Date
Jan
80.3 mm (3.2 in)
21 January 1954
Feb
82.8 mm (3.3 in)
13 February 1948
Mar
142.5 mm (5.6 in)
30 March 1886
Apr
90.2 mm (3.6 in)
6 April 1892
May
61.0 mm (2.4 in)
13 May 1897
Jun
85.9 mm (3.4 in)
29 June 1928
Jul
128.3 mm (5.1 in)
28 July 1948
Aug
78.0 mm (3.1 in)
4 August 1914
Sep
106.7 mm (4.2 in)
16 September 1889
Oct
88.9 mm (3.5 in)
14 October 1919
Nov
94.0 mm (3.7 in)
19 November 1948
Dec
101.6 mm (4.0 in)
13 December 1956
Period of Record Coverage
1913 to 1962
Complete yearUnder 90 percent of days
50 years of record at Loudon 1 E, 1913 to 1962. 7 years have data for under 90 percent of days and are left out of rankings: 1913, 1920, 1936, 1939, 1945, 1949, 1962.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Loudon 1 E, 1914 to 1961. Blue stripes are years cooler than the station's own mean of 14.8 C (58.6 F); red stripes are warmer. The coolest year was 1924, at 13.2 C (55.7 F), and the warmest was 1935, at 15.9 C (60.6 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Loudon 1 E as warming stripes, 1914 to 1961
Year
Annual mean temperature
Difference from the station mean
1914
14.2 C
-0.53 C
1915
14.4 C
-0.41 C
1917
13.5 C
-1.22 C
1918
14.7 C
-0.02 C
1919
15.3 C
+0.58 C
1922
15.6 C
+0.85 C
1923
14.7 C
-0.10 C
1924
13.2 C
-1.59 C
1925
15.1 C
+0.29 C
1926
13.8 C
-0.93 C
1927
15.0 C
+0.20 C
1928
13.3 C
-1.42 C
1929
14.9 C
+0.09 C
1930
14.9 C
+0.15 C
1931
15.7 C
+0.97 C
1932
15.8 C
+1.06 C
1934
15.5 C
+0.73 C
1935
15.9 C
+1.14 C
1937
15.2 C
+0.45 C
1940
14.3 C
-0.51 C
1941
15.5 C
+0.72 C
1942
14.4 C
-0.36 C
1943
14.6 C
-0.19 C
1944
15.0 C
+0.27 C
1948
15.4 C
+0.66 C
1950
15.3 C
+0.58 C
1951
15.6 C
+0.87 C
1953
15.1 C
+0.36 C
1955
14.6 C
-0.15 C
1956
14.9 C
+0.09 C
1957
15.4 C
+0.62 C
1958
13.8 C
-0.97 C
1959
14.6 C
-0.16 C
1960
13.5 C
-1.27 C
1961
13.9 C
-0.82 C
The fitted trend in annual mean temperature here over 1914 to 1961 is 0.02 C (-0.16 to 0.20) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.28 to 0.37) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Loudon 1 E
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.02 C (-0.16 to 0.20) per decade
0.04 F (-0.28 to 0.37) per decade
1914 to 1961
35
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.2) per decade
1914 to 1961
35
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.4) per decade
0.3 F (-0.2 to 0.7) per decade
1914 to 1961
35
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
1885 to 1962
Yearly extremes at Loudon 1 E: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1930
37.2 C (99.0 F)
50
Coldest night (TNn)
-22.8 C (-9.0 F)
1940
-14.1 C (6.5 F)
50
Wettest day (Rx1day)
142.5 mm (5.6 in)
1886
62.9 mm (2.5 in)
74
Wettest five days (Rx5day)
235.9 mm (9.3 in)
1886
111.9 mm (4.4 in)
74
Longest dry spell (CDD)
40 days
1920
20 days
74
Hottest day (TXx)
The hottest day of the year at Loudon 1 E, 1885 to 1962. The record is 42.2 C (108.0 F) in 1930, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Loudon 1 E by year
Year
Hottest day (TXx)
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1901
n/a
1904
n/a
1905
n/a
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
39.4 C (102.9 F)
1914
39.4 C (102.9 F)
1915
37.2 C (99.0 F)
1916
36.7 C (98.1 F)
1917
37.2 C (99.0 F)
1918
39.4 C (102.9 F)
1919
39.4 C (102.9 F)
1920
35.6 C (96.1 F)
1921
37.2 C (99.0 F)
1922
36.1 C (97.0 F)
1923
36.1 C (97.0 F)
1924
38.3 C (100.9 F)
1925
41.1 C (106.0 F)
1926
39.4 C (102.9 F)
1927
37.2 C (99.0 F)
1928
36.1 C (97.0 F)
1929
37.2 C (99.0 F)
1930
42.2 C (108.0 F)
1931
40.6 C (105.1 F)
1932
38.9 C (102.0 F)
1933
39.4 C (102.9 F)
1934
41.1 C (106.0 F)
1935
40.0 C (104.0 F)
1936
41.1 C (106.0 F)
1937
36.7 C (98.1 F)
1938
36.1 C (97.0 F)
1939
38.9 C (102.0 F)
1940
37.8 C (100.0 F)
1941
37.2 C (99.0 F)
1942
36.1 C (97.0 F)
1943
38.3 C (100.9 F)
1944
37.8 C (100.0 F)
1945
30.6 C (87.1 F)
1946
35.0 C (95.0 F)
1947
35.6 C (96.1 F)
1948
37.8 C (100.0 F)
1949
35.6 C (96.1 F)
1950
33.9 C (93.0 F)
1951
37.8 C (100.0 F)
1952
41.1 C (106.0 F)
1953
38.3 C (100.9 F)
1954
40.6 C (105.1 F)
1955
36.7 C (98.1 F)
1956
38.3 C (100.9 F)
1957
37.2 C (99.0 F)
1958
36.7 C (98.1 F)
1959
36.7 C (98.1 F)
1960
35.6 C (96.1 F)
1961
33.9 C (93.0 F)
1962
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Loudon 1 E, 1885 to 1962. The record is -22.8 C (-9.0 F) in 1940, marked on the chart; the median year is -14.1 C (6.5 F).
Coldest night (TNn) at Loudon 1 E by year
Year
Coldest night (TNn)
1885
n/a
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1901
n/a
1904
n/a
1905
n/a
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
-8.9 C (16.0 F)
1914
-17.2 C (1.0 F)
1915
-7.8 C (18.0 F)
1916
-15.6 C (3.9 F)
1917
-17.8 C (0.0 F)
1918
-20.0 C (-4.0 F)
1919
-20.0 C (-4.0 F)
1920
-13.3 C (8.1 F)
1921
-6.7 C (19.9 F)
1922
-9.4 C (15.1 F)
1923
-12.8 C (9.0 F)
1924
-16.7 C (1.9 F)
1925
-17.8 C (0.0 F)
1926
-12.2 C (10.0 F)
1927
-16.7 C (1.9 F)
1928
-20.6 C (-5.1 F)
1929
-15.6 C (3.9 F)
1930
-14.4 C (6.1 F)
1931
-12.8 C (9.0 F)
1932
-11.7 C (10.9 F)
1933
-16.7 C (1.9 F)
1934
-15.0 C (5.0 F)
1935
-12.8 C (9.0 F)
1936
-16.1 C (3.0 F)
1937
-12.2 C (10.0 F)
1938
-11.1 C (12.0 F)
1939
-11.1 C (12.0 F)
1940
-22.8 C (-9.0 F)
1941
-10.0 C (14.0 F)
1942
-15.6 C (3.9 F)
1943
-14.4 C (6.1 F)
1944
-10.6 C (12.9 F)
1945
-11.7 C (10.9 F)
1946
-9.4 C (15.1 F)
1947
-13.3 C (8.1 F)
1948
-18.3 C (-0.9 F)
1949
-8.3 C (17.1 F)
1950
-16.7 C (1.9 F)
1951
-16.1 C (3.0 F)
1952
-10.6 C (12.9 F)
1953
-13.3 C (8.1 F)
1954
-11.1 C (12.0 F)
1955
-13.9 C (7.0 F)
1956
-10.0 C (14.0 F)
1957
-13.9 C (7.0 F)
1958
-19.4 C (-2.9 F)
1959
-14.4 C (6.1 F)
1960
-15.6 C (3.9 F)
1961
-15.6 C (3.9 F)
1962
-17.2 C (1.0 F)
Wettest day (Rx1day)
The wettest day of the year at Loudon 1 E, 1885 to 1962. The record is 142.5 mm (5.6 in) in 1886, marked on the chart; the median year is 62.9 mm (2.5 in).
Wettest day (Rx1day) at Loudon 1 E by year
Year
Wettest day (Rx1day)
1885
37.3 mm (1.5 in)
1886
142.5 mm (5.6 in)
1887
44.7 mm (1.8 in)
1888
44.5 mm (1.8 in)
1889
106.7 mm (4.2 in)
1890
50.0 mm (2.0 in)
1891
51.3 mm (2.0 in)
1892
90.2 mm (3.6 in)
1893
56.1 mm (2.2 in)
1894
58.4 mm (2.3 in)
1895
55.9 mm (2.2 in)
1896
57.7 mm (2.3 in)
1897
61.0 mm (2.4 in)
1898
10.2 mm (0.4 in)
1899
38.1 mm (1.5 in)
1901
n/a
1904
43.2 mm (1.7 in)
1905
51.3 mm (2.0 in)
1906
55.9 mm (2.2 in)
1907
94.0 mm (3.7 in)
1908
81.3 mm (3.2 in)
1909
66.0 mm (2.6 in)
1910
83.8 mm (3.3 in)
1911
63.5 mm (2.5 in)
1912
72.1 mm (2.8 in)
1913
62.2 mm (2.4 in)
1914
78.0 mm (3.1 in)
1915
78.5 mm (3.1 in)
1916
58.7 mm (2.3 in)
1917
82.6 mm (3.3 in)
1918
53.6 mm (2.1 in)
1919
88.9 mm (3.5 in)
1920
85.6 mm (3.4 in)
1921
81.8 mm (3.2 in)
1922
72.1 mm (2.8 in)
1923
59.4 mm (2.3 in)
1924
56.9 mm (2.2 in)
1925
72.1 mm (2.8 in)
1926
56.9 mm (2.2 in)
1927
53.8 mm (2.1 in)
1928
85.9 mm (3.4 in)
1929
93.5 mm (3.7 in)
1930
46.7 mm (1.8 in)
1931
68.1 mm (2.7 in)
1932
64.0 mm (2.5 in)
1933
59.7 mm (2.4 in)
1934
66.0 mm (2.6 in)
1935
90.9 mm (3.6 in)
1936
100.3 mm (3.9 in)
1937
61.0 mm (2.4 in)
1938
59.4 mm (2.3 in)
1939
72.1 mm (2.8 in)
1940
50.5 mm (2.0 in)
1941
61.2 mm (2.4 in)
1942
66.3 mm (2.6 in)
1943
47.8 mm (1.9 in)
1944
106.7 mm (4.2 in)
1945
61.0 mm (2.4 in)
1946
79.0 mm (3.1 in)
1947
53.8 mm (2.1 in)
1948
128.3 mm (5.1 in)
1949
56.6 mm (2.2 in)
1950
66.5 mm (2.6 in)
1951
60.2 mm (2.4 in)
1952
53.6 mm (2.1 in)
1953
52.1 mm (2.1 in)
1954
80.3 mm (3.2 in)
1955
44.7 mm (1.8 in)
1956
101.6 mm (4.0 in)
1957
72.9 mm (2.9 in)
1958
50.8 mm (2.0 in)
1959
70.1 mm (2.8 in)
1960
87.6 mm (3.4 in)
1961
86.4 mm (3.4 in)
1962
74.7 mm (2.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Loudon 1 E, 1885 to 1962. The record is 235.9 mm (9.3 in) in 1886, marked on the chart; the median year is 111.9 mm (4.4 in).
Wettest five days (Rx5day) at Loudon 1 E by year
Year
Wettest five days (Rx5day)
1885
109.0 mm (4.3 in)
1886
235.9 mm (9.3 in)
1887
73.9 mm (2.9 in)
1888
76.5 mm (3.0 in)
1889
140.0 mm (5.5 in)
1890
104.6 mm (4.1 in)
1891
98.6 mm (3.9 in)
1892
159.3 mm (6.3 in)
1893
94.2 mm (3.7 in)
1894
104.1 mm (4.1 in)
1895
114.5 mm (4.5 in)
1896
116.8 mm (4.6 in)
1897
119.3 mm (4.7 in)
1898
10.2 mm (0.4 in)
1899
60.2 mm (2.4 in)
1901
n/a
1904
71.2 mm (2.8 in)
1905
77.5 mm (3.1 in)
1906
87.7 mm (3.5 in)
1907
138.5 mm (5.5 in)
1908
137.2 mm (5.4 in)
1909
144.7 mm (5.7 in)
1910
106.2 mm (4.2 in)
1911
119.6 mm (4.7 in)
1912
127.2 mm (5.0 in)
1913
89.6 mm (3.5 in)
1914
114.8 mm (4.5 in)
1915
137.4 mm (5.4 in)
1916
85.4 mm (3.4 in)
1917
159.1 mm (6.3 in)
1918
89.4 mm (3.5 in)
1919
189.7 mm (7.5 in)
1920
134.7 mm (5.3 in)
1921
111.3 mm (4.4 in)
1922
109.2 mm (4.3 in)
1923
83.3 mm (3.3 in)
1924
152.2 mm (6.0 in)
1925
131.1 mm (5.2 in)
1926
126.0 mm (5.0 in)
1927
73.6 mm (2.9 in)
1928
112.3 mm (4.4 in)
1929
128.2 mm (5.0 in)
1930
80.8 mm (3.2 in)
1931
90.4 mm (3.6 in)
1932
111.5 mm (4.4 in)
1933
88.3 mm (3.5 in)
1934
107.9 mm (4.2 in)
1935
116.1 mm (4.6 in)
1936
200.7 mm (7.9 in)
1937
99.6 mm (3.9 in)
1938
87.4 mm (3.4 in)
1939
118.6 mm (4.7 in)
1940
72.7 mm (2.9 in)
1941
100.5 mm (4.0 in)
1942
122.2 mm (4.8 in)
1943
118.9 mm (4.7 in)
1944
157.5 mm (6.2 in)
1945
102.7 mm (4.0 in)
1946
101.4 mm (4.0 in)
1947
110.4 mm (4.3 in)
1948
150.1 mm (5.9 in)
1949
136.3 mm (5.4 in)
1950
117.1 mm (4.6 in)
1951
110.2 mm (4.3 in)
1952
84.6 mm (3.3 in)
1953
86.4 mm (3.4 in)
1954
171.1 mm (6.7 in)
1955
84.3 mm (3.3 in)
1956
184.4 mm (7.3 in)
1957
164.8 mm (6.5 in)
1958
88.1 mm (3.5 in)
1959
131.6 mm (5.2 in)
1960
112.2 mm (4.4 in)
1961
140.8 mm (5.5 in)
1962
124.7 mm (4.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Loudon 1 E, 1885 to 1962. The record is 40 days in 1920, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Loudon 1 E by year
Year
Longest dry spell (CDD)
1885
10 days
1886
9 days
1887
11 days
1888
8 days
1889
24 days
1890
20 days
1891
21 days
1892
17 days
1893
18 days
1894
23 days
1895
20 days
1896
22 days
1897
21 days
1898
30 days
1899
14 days
1901
n/a
1904
21 days
1905
17 days
1906
22 days
1907
18 days
1908
21 days
1909
22 days
1910
23 days
1911
18 days
1912
19 days
1913
29 days
1914
21 days
1915
22 days
1916
13 days
1917
24 days
1918
14 days
1919
13 days
1920
40 days
1921
16 days
1922
16 days
1923
26 days
1924
26 days
1925
29 days
1926
13 days
1927
31 days
1928
14 days
1929
15 days
1930
26 days
1931
34 days
1932
16 days
1933
34 days
1934
16 days
1935
34 days
1936
19 days
1937
11 days
1938
21 days
1939
14 days
1940
24 days
1941
28 days
1942
18 days
1943
28 days
1944
26 days
1945
14 days
1946
14 days
1947
15 days
1948
23 days
1949
11 days
1950
16 days
1951
20 days
1952
30 days
1953
22 days
1954
20 days
1955
20 days
1956
21 days
1957
16 days
1958
21 days
1959
19 days
1960
18 days
1961
18 days
1962
20 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
35 years with a frost
Across 35 years with a frost, the median last spring frost at Loudon 1 E falls on 15 April and the median first autumn frost on 27 October, which leaves a median of 199 days between them.
Fitted over all years, the growing season changes by +1.3 days per decade at this station.
Frost dates and growing season at Loudon 1 E
Measure
Median, all years
Earliest period
Recent period (1922 to 1961)
Recent against earliest
Fitted trend
Last spring frost
15 April
n/a
15 April
n/a
+0.8 days per decade
First autumn frost
27 October
n/a
27 October
n/a
+2.0 days per decade
Growing days
199 days
n/a
199 days
n/a
+1.3 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
62 years, 1890 to 1961
A day with at least 66.4 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 127.5 mm (5.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Loudon 1 E: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
66.4 mm (2.6 in)
5 years
82.0 mm (3.2 in)
10 years
92.6 mm (3.6 in)
25 years
106.4 mm (4.2 in)
50 years
116.9 mm (4.6 in)
100 years
127.5 mm (5.0 in)
Longer than the 62 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, 62 years of values from 1890 to 1961.
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: 128.3 mm (5.1 in) in 1948; 106.7 mm (4.2 in) in 1944; 101.6 mm (4.0 in) in 1956.
Download the Data
Data for Loudon 1 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Loudon 1 E 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.