Record envelope, standing records and threshold days for La Delle 7 NE (USC00394661), South Dakota, United States, with 78 years of record.
Key Facts for La Delle 7 NE
La Delle 7 NE (USC00394661) is a weather station in South Dakota, United States at 44.68 latitude and -98.00 longitude, 427 m (1,401 ft) above sea level.
The station reports from 1897 to 1974, 78 years of record.
1,464 records set at La Delle 7 NE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
La Delle 7 NE tied a daily record low minimum temperature of -6.1 C (21.0 F) on 1 October 1974.
About the Station
Location: South Dakota, United States, 44.68 latitude, -98.00 longitude.
Elevation: 427 m (1,401 ft).
Period of record: 1897 to 1974, 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 La Delle 7 NE. 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 La Delle 7 NE, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-43.9 C (-47.0 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-43.9 C (-47.0 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-20.0 C (-4.0 F)
n/a
n/a
May
43.3 C (109.9 F)
-12.8 C (9.0 F)
n/a
n/a
Jun
46.1 C (115.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
44.4 C (111.9 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
41.7 C (107.1 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at La Delle 7 NE still stand. 1936 holds the most, with 55.
Standing records at La Delle 7 NE by the year they were set
Year set
Standing records
1897
45
1898
18
1899
29
1900
25
1901
18
1902
31
1903
20
1904
16
1905
25
1906
13
1907
18
1908
17
1909
26
1910
24
1911
22
1912
21
1913
22
1914
16
1915
20
1916
22
1917
27
1918
19
1919
24
1920
10
1921
23
1922
17
1923
22
1924
29
1925
26
1926
18
1927
22
1928
19
1929
17
1930
24
1931
49
1932
22
1933
26
1934
43
1935
23
1936
55
1937
31
1938
14
1939
29
1940
14
1941
22
1942
18
1943
14
1944
12
1945
11
1946
13
1947
18
1948
13
1949
14
1950
23
1951
15
1952
14
1953
16
1954
13
1955
23
1956
8
1957
2
1958
20
1959
19
1960
8
1961
3
1962
9
1963
13
1964
18
1965
22
1966
19
1967
9
1969
3
1970
3
1971
7
1972
9
1973
2
All-Time Record Progression
2 new records
2 all-time records were set at La Delle 7 NE between 28 June 1931 and 30 July 1933. Each dot is a new record.
When La Delle 7 NE set new all-time records
Date
Kind
Detail
1931-06-28
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
1933-07-30
Record high minimum temperature
Record high minimum temperature 30.0 C (86.0 F)
Wettest Day of Each Month
Aug: 118.9 mm (4.7 in)
The wettest day on record for each calendar month at La Delle 7 NE. The most was 118.9 mm (4.7 in) on 22 August 1905.
Record daily precipitation for each month at La Delle 7 NE
Month
Record daily precipitation (mm)
Date
Jan
39.4 mm (1.6 in)
5 January 1897
Feb
33.0 mm (1.3 in)
13 February 1915
Mar
41.7 mm (1.6 in)
25 March 1942
Apr
67.3 mm (2.6 in)
13 April 1912
May
79.8 mm (3.1 in)
25 May 1907
Jun
101.6 mm (4.0 in)
30 June 1946
Jul
88.6 mm (3.5 in)
23 July 1902
Aug
118.9 mm (4.7 in)
22 August 1905
Sep
89.9 mm (3.5 in)
25 September 1901
Oct
95.3 mm (3.8 in)
5 October 1946
Nov
52.1 mm (2.1 in)
2 November 1972
Dec
34.3 mm (1.4 in)
11 December 1949
Period of Record Coverage
1897 to 1974
Complete yearUnder 90 percent of days
77 years of record at La Delle 7 NE, 1897 to 1974. 23 years have data for under 90 percent of days and are left out of rankings: 1898, 1910, 1912, 1914, 1916, 1917, 1919, 1920 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at La Delle 7 NE, 1897 to 1964. Blue stripes are years cooler than the station's own mean of 6.9 C (44.5 F); red stripes are warmer. The coolest year was 1950, at 5.0 C (41.0 F), and the warmest was 1931, at 10.0 C (49.9 F). The strongest colour marks a difference of 3.1 C (5.6 F).
Annual mean temperature at La Delle 7 NE as warming stripes, 1897 to 1964
Year
Annual mean temperature
Difference from the station mean
1897
5.6 C
-1.31 C
1899
5.8 C
-1.10 C
1900
7.7 C
+0.79 C
1902
6.3 C
-0.68 C
1903
5.7 C
-1.22 C
1904
5.5 C
-1.44 C
1905
6.0 C
-0.92 C
1906
6.6 C
-0.31 C
1907
5.7 C
-1.20 C
1908
7.9 C
+0.93 C
1911
6.6 C
-0.38 C
1913
7.5 C
+0.56 C
1919
7.0 C
+0.07 C
1925
7.4 C
+0.47 C
1928
8.0 C
+1.02 C
1929
5.9 C
-1.04 C
1931
10.0 C
+3.02 C
1934
9.2 C
+2.22 C
1935
7.2 C
+0.26 C
1936
6.0 C
-0.93 C
1937
6.1 C
-0.89 C
1938
7.8 C
+0.88 C
1939
8.3 C
+1.35 C
1940
7.0 C
+0.03 C
1941
8.2 C
+1.22 C
1942
7.1 C
+0.13 C
1943
6.4 C
-0.50 C
1944
6.9 C
-0.02 C
1945
6.1 C
-0.80 C
1946
7.3 C
+0.33 C
1947
6.4 C
-0.55 C
1948
6.6 C
-0.36 C
1949
7.2 C
+0.24 C
1950
5.0 C
-1.96 C
1951
5.2 C
-1.78 C
1952
7.3 C
+0.34 C
1953
7.6 C
+0.70 C
1954
7.5 C
+0.58 C
1955
7.0 C
+0.09 C
1956
6.5 C
-0.44 C
1958
7.5 C
+0.55 C
1959
7.1 C
+0.20 C
1963
7.9 C
+0.99 C
1964
7.6 C
+0.70 C
The fitted trend in annual mean temperature here over 1897 to 1964 is 0.12 C (-0.03 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at La Delle 7 NE
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.12 C (-0.03 to 0.27) per decade
0.2 F (-0.1 to 0.5) per decade
1897 to 1964
44
Not clearly different from zero
Mean daily maximum
0.18 C (-0.01 to 0.37) per decade
0.32 F (-0.01 to 0.66) per decade
1897 to 1964
44
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.4) per decade
1897 to 1964
44
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
1897 to 1974
Yearly extremes at La Delle 7 NE: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.1 C (115.0 F)
1931
38.3 C (100.9 F)
77
Coldest night (TNn)
-43.9 C (-47.0 F)
1899
-34.4 C (-29.9 F)
77
Wettest day (Rx1day)
118.9 mm (4.7 in)
1905
47.0 mm (1.9 in)
77
Wettest five days (Rx5day)
166.1 mm (6.5 in)
1956
73.2 mm (2.9 in)
77
Longest dry spell (CDD)
74 days
1939
31 days
77
Hottest day (TXx)
The hottest day of the year at La Delle 7 NE, 1897 to 1974. The record is 46.1 C (115.0 F) in 1931, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at La Delle 7 NE by year
Year
Hottest day (TXx)
1897
38.9 C (102.0 F)
1898
38.9 C (102.0 F)
1899
40.6 C (105.1 F)
1900
38.9 C (102.0 F)
1901
42.2 C (108.0 F)
1902
36.7 C (98.1 F)
1903
33.9 C (93.0 F)
1904
36.7 C (98.1 F)
1905
33.9 C (93.0 F)
1906
35.6 C (96.1 F)
1907
35.6 C (96.1 F)
1908
38.9 C (102.0 F)
1909
35.0 C (95.0 F)
1910
37.2 C (99.0 F)
1911
40.0 C (104.0 F)
1912
37.8 C (100.0 F)
1913
40.6 C (105.1 F)
1914
39.4 C (102.9 F)
1915
33.3 C (91.9 F)
1916
35.6 C (96.1 F)
1917
41.1 C (106.0 F)
1918
35.0 C (95.0 F)
1919
37.8 C (100.0 F)
1920
34.4 C (93.9 F)
1921
35.0 C (95.0 F)
1922
36.1 C (97.0 F)
1923
37.2 C (99.0 F)
1924
34.4 C (93.9 F)
1925
40.0 C (104.0 F)
1926
42.8 C (109.0 F)
1927
37.8 C (100.0 F)
1928
40.6 C (105.1 F)
1929
41.1 C (106.0 F)
1930
42.8 C (109.0 F)
1931
46.1 C (115.0 F)
1932
43.3 C (109.9 F)
1933
43.9 C (111.0 F)
1934
45.0 C (113.0 F)
1935
40.6 C (105.1 F)
1936
44.4 C (111.9 F)
1937
43.3 C (109.9 F)
1938
40.0 C (104.0 F)
1939
38.9 C (102.0 F)
1940
43.3 C (109.9 F)
1941
43.3 C (109.9 F)
1942
36.1 C (97.0 F)
1943
37.2 C (99.0 F)
1944
35.0 C (95.0 F)
1945
36.7 C (98.1 F)
1946
35.6 C (96.1 F)
1947
41.1 C (106.0 F)
1948
35.6 C (96.1 F)
1949
38.3 C (100.9 F)
1950
36.1 C (97.0 F)
1951
35.6 C (96.1 F)
1952
38.3 C (100.9 F)
1953
35.6 C (96.1 F)
1954
37.8 C (100.0 F)
1955
41.1 C (106.0 F)
1956
37.8 C (100.0 F)
1957
40.0 C (104.0 F)
1958
37.8 C (100.0 F)
1959
38.9 C (102.0 F)
1960
37.8 C (100.0 F)
1961
37.8 C (100.0 F)
1962
34.4 C (93.9 F)
1963
37.2 C (99.0 F)
1964
41.1 C (106.0 F)
1965
44.4 C (111.9 F)
1966
45.0 C (113.0 F)
1967
39.4 C (102.9 F)
1969
37.2 C (99.0 F)
1970
40.0 C (104.0 F)
1971
40.6 C (105.1 F)
1972
36.7 C (98.1 F)
1973
39.4 C (102.9 F)
1974
36.1 C (97.0 F)
Coldest night (TNn)
The coldest night of the year at La Delle 7 NE, 1897 to 1974. The record is -43.9 C (-47.0 F) in 1899, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at La Delle 7 NE by year
Year
Coldest night (TNn)
1897
-33.3 C (-27.9 F)
1898
-33.9 C (-29.0 F)
1899
-43.9 C (-47.0 F)
1900
-31.7 C (-25.1 F)
1901
-32.2 C (-26.0 F)
1902
-33.3 C (-27.9 F)
1903
-35.0 C (-31.0 F)
1904
-37.2 C (-35.0 F)
1905
-41.7 C (-43.1 F)
1906
-32.2 C (-26.0 F)
1907
-33.3 C (-27.9 F)
1908
-29.4 C (-20.9 F)
1909
-38.9 C (-38.0 F)
1910
-34.4 C (-29.9 F)
1911
-36.1 C (-33.0 F)
1912
-43.9 C (-47.0 F)
1913
-33.9 C (-29.0 F)
1914
-39.4 C (-38.9 F)
1915
-36.1 C (-33.0 F)
1916
-42.8 C (-45.0 F)
1917
-40.6 C (-41.1 F)
1918
-35.6 C (-32.1 F)
1919
-28.9 C (-20.0 F)
1920
-31.7 C (-25.1 F)
1921
-22.8 C (-9.0 F)
1922
-35.6 C (-32.1 F)
1923
-30.6 C (-23.1 F)
1924
-40.6 C (-41.1 F)
1925
-32.2 C (-26.0 F)
1926
-37.8 C (-36.0 F)
1927
-35.6 C (-32.1 F)
1928
-36.1 C (-33.0 F)
1929
-40.0 C (-40.0 F)
1930
-36.1 C (-33.0 F)
1931
-30.0 C (-22.0 F)
1932
-36.1 C (-33.0 F)
1933
-35.6 C (-32.1 F)
1934
-30.6 C (-23.1 F)
1935
-32.8 C (-27.0 F)
1936
-43.3 C (-45.9 F)
1937
-34.4 C (-29.9 F)
1938
-36.7 C (-34.1 F)
1939
-35.6 C (-32.1 F)
1940
-34.4 C (-29.9 F)
1941
-30.6 C (-23.1 F)
1942
-33.3 C (-27.9 F)
1943
-40.6 C (-41.1 F)
1944
-34.4 C (-29.9 F)
1945
-31.7 C (-25.1 F)
1946
-30.0 C (-22.0 F)
1947
-30.0 C (-22.0 F)
1948
-34.4 C (-29.9 F)
1949
-37.8 C (-36.0 F)
1950
-35.6 C (-32.1 F)
1951
-35.0 C (-31.0 F)
1952
-31.7 C (-25.1 F)
1953
-30.6 C (-23.1 F)
1954
-36.7 C (-34.1 F)
1955
-34.4 C (-29.9 F)
1956
-35.0 C (-31.0 F)
1957
-33.9 C (-29.0 F)
1958
-36.1 C (-33.0 F)
1959
-36.1 C (-33.0 F)
1960
-34.4 C (-29.9 F)
1961
-34.4 C (-29.9 F)
1962
-33.9 C (-29.0 F)
1963
-40.0 C (-40.0 F)
1964
-36.7 C (-34.1 F)
1965
-37.2 C (-35.0 F)
1966
-38.9 C (-38.0 F)
1967
-40.0 C (-40.0 F)
1969
-26.1 C (-15.0 F)
1970
-5.0 C (23.0 F)
1971
-28.3 C (-18.9 F)
1972
-40.6 C (-41.1 F)
1973
-3.9 C (25.0 F)
1974
-6.7 C (19.9 F)
Wettest day (Rx1day)
The wettest day of the year at La Delle 7 NE, 1897 to 1974. The record is 118.9 mm (4.7 in) in 1905, marked on the chart; the median year is 47.0 mm (1.9 in).
Wettest day (Rx1day) at La Delle 7 NE by year
Year
Wettest day (Rx1day)
1897
39.4 mm (1.6 in)
1898
44.2 mm (1.7 in)
1899
40.6 mm (1.6 in)
1900
65.8 mm (2.6 in)
1901
89.9 mm (3.5 in)
1902
88.6 mm (3.5 in)
1903
83.8 mm (3.3 in)
1904
37.6 mm (1.5 in)
1905
118.9 mm (4.7 in)
1906
49.8 mm (2.0 in)
1907
79.8 mm (3.1 in)
1908
52.1 mm (2.1 in)
1909
66.0 mm (2.6 in)
1910
38.6 mm (1.5 in)
1911
55.9 mm (2.2 in)
1912
67.3 mm (2.6 in)
1913
41.9 mm (1.6 in)
1914
63.5 mm (2.5 in)
1915
68.6 mm (2.7 in)
1916
85.1 mm (3.4 in)
1917
45.2 mm (1.8 in)
1918
47.5 mm (1.9 in)
1919
64.8 mm (2.6 in)
1920
47.0 mm (1.9 in)
1921
49.5 mm (1.9 in)
1922
27.9 mm (1.1 in)
1923
54.1 mm (2.1 in)
1924
77.5 mm (3.1 in)
1925
62.2 mm (2.4 in)
1926
58.4 mm (2.3 in)
1927
43.2 mm (1.7 in)
1928
32.5 mm (1.3 in)
1929
32.5 mm (1.3 in)
1930
36.3 mm (1.4 in)
1931
24.4 mm (1.0 in)
1932
43.2 mm (1.7 in)
1933
53.1 mm (2.1 in)
1934
44.5 mm (1.8 in)
1935
35.6 mm (1.4 in)
1936
35.6 mm (1.4 in)
1937
28.7 mm (1.1 in)
1938
47.8 mm (1.9 in)
1939
37.3 mm (1.5 in)
1940
66.0 mm (2.6 in)
1941
43.9 mm (1.7 in)
1942
53.6 mm (2.1 in)
1943
99.1 mm (3.9 in)
1944
42.2 mm (1.7 in)
1945
66.8 mm (2.6 in)
1946
101.6 mm (4.0 in)
1947
50.3 mm (2.0 in)
1948
49.5 mm (1.9 in)
1949
34.3 mm (1.4 in)
1950
50.8 mm (2.0 in)
1951
35.6 mm (1.4 in)
1952
45.7 mm (1.8 in)
1953
69.3 mm (2.7 in)
1954
24.1 mm (0.9 in)
1955
31.2 mm (1.2 in)
1956
77.2 mm (3.0 in)
1957
43.9 mm (1.7 in)
1958
65.3 mm (2.6 in)
1959
45.7 mm (1.8 in)
1960
71.6 mm (2.8 in)
1961
91.4 mm (3.6 in)
1962
45.7 mm (1.8 in)
1963
45.0 mm (1.8 in)
1964
26.2 mm (1.0 in)
1965
42.7 mm (1.7 in)
1966
45.7 mm (1.8 in)
1967
57.4 mm (2.3 in)
1969
39.1 mm (1.5 in)
1970
42.9 mm (1.7 in)
1971
34.5 mm (1.4 in)
1972
58.4 mm (2.3 in)
1973
25.4 mm (1.0 in)
1974
7.6 mm (0.30 in)
Wettest five days (Rx5day)
The wettest five days of the year at La Delle 7 NE, 1897 to 1974. The record is 166.1 mm (6.5 in) in 1956, marked on the chart; the median year is 73.2 mm (2.9 in).
Wettest five days (Rx5day) at La Delle 7 NE by year
Year
Wettest five days (Rx5day)
1897
49.2 mm (1.9 in)
1898
51.6 mm (2.0 in)
1899
69.4 mm (2.7 in)
1900
105.5 mm (4.2 in)
1901
134.9 mm (5.3 in)
1902
115.6 mm (4.6 in)
1903
141.7 mm (5.6 in)
1904
52.3 mm (2.1 in)
1905
128.8 mm (5.1 in)
1906
81.8 mm (3.2 in)
1907
82.3 mm (3.2 in)
1908
104.2 mm (4.1 in)
1909
92.2 mm (3.6 in)
1910
57.7 mm (2.3 in)
1911
64.8 mm (2.6 in)
1912
78.8 mm (3.1 in)
1913
78.2 mm (3.1 in)
1914
139.9 mm (5.5 in)
1915
78.8 mm (3.1 in)
1916
111.8 mm (4.4 in)
1917
59.3 mm (2.3 in)
1918
58.3 mm (2.3 in)
1919
75.0 mm (3.0 in)
1920
71.9 mm (2.8 in)
1921
75.9 mm (3.0 in)
1922
52.1 mm (2.1 in)
1923
71.4 mm (2.8 in)
1924
111.8 mm (4.4 in)
1925
94.0 mm (3.7 in)
1926
102.9 mm (4.1 in)
1927
88.4 mm (3.5 in)
1928
55.9 mm (2.2 in)
1929
37.8 mm (1.5 in)
1930
57.2 mm (2.3 in)
1931
34.3 mm (1.4 in)
1932
54.9 mm (2.2 in)
1933
56.9 mm (2.2 in)
1934
46.5 mm (1.8 in)
1935
51.1 mm (2.0 in)
1936
52.8 mm (2.1 in)
1937
56.6 mm (2.2 in)
1938
73.2 mm (2.9 in)
1939
40.9 mm (1.6 in)
1940
85.6 mm (3.4 in)
1941
43.9 mm (1.7 in)
1942
89.0 mm (3.5 in)
1943
121.7 mm (4.8 in)
1944
71.2 mm (2.8 in)
1945
86.1 mm (3.4 in)
1946
125.2 mm (4.9 in)
1947
60.7 mm (2.4 in)
1948
64.3 mm (2.5 in)
1949
49.0 mm (1.9 in)
1950
88.1 mm (3.5 in)
1951
56.6 mm (2.2 in)
1952
60.1 mm (2.4 in)
1953
143.0 mm (5.6 in)
1954
33.8 mm (1.3 in)
1955
44.2 mm (1.7 in)
1956
166.1 mm (6.5 in)
1957
70.9 mm (2.8 in)
1958
92.3 mm (3.6 in)
1959
63.3 mm (2.5 in)
1960
111.0 mm (4.4 in)
1961
135.9 mm (5.4 in)
1962
74.3 mm (2.9 in)
1963
72.0 mm (2.8 in)
1964
34.0 mm (1.3 in)
1965
102.8 mm (4.0 in)
1966
74.9 mm (2.9 in)
1967
103.5 mm (4.1 in)
1969
77.2 mm (3.0 in)
1970
107.7 mm (4.2 in)
1971
64.7 mm (2.5 in)
1972
140.1 mm (5.5 in)
1973
25.4 mm (1.0 in)
1974
12.7 mm (0.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at La Delle 7 NE, 1897 to 1974. The record is 74 days in 1939, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at La Delle 7 NE by year
Year
Longest dry spell (CDD)
1897
19 days
1898
40 days
1899
38 days
1900
24 days
1901
28 days
1902
32 days
1903
26 days
1904
22 days
1905
24 days
1906
25 days
1907
39 days
1908
30 days
1909
35 days
1910
36 days
1911
36 days
1912
32 days
1913
35 days
1914
26 days
1915
19 days
1916
48 days
1917
19 days
1918
21 days
1919
32 days
1920
22 days
1921
23 days
1922
17 days
1923
35 days
1924
29 days
1925
48 days
1926
19 days
1927
23 days
1928
24 days
1929
16 days
1930
41 days
1931
34 days
1932
17 days
1933
31 days
1934
57 days
1935
45 days
1936
25 days
1937
35 days
1938
25 days
1939
74 days
1940
31 days
1941
36 days
1942
70 days
1943
36 days
1944
33 days
1945
30 days
1946
30 days
1947
26 days
1948
35 days
1949
59 days
1950
31 days
1951
33 days
1952
64 days
1953
25 days
1954
30 days
1955
27 days
1956
33 days
1957
20 days
1958
43 days
1959
45 days
1960
31 days
1961
35 days
1962
21 days
1963
43 days
1964
34 days
1965
30 days
1966
30 days
1967
24 days
1969
17 days
1970
33 days
1971
23 days
1972
30 days
1973
14 days
1974
31 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
44 years with a frost
Across 44 years with a frost, the median last spring frost at La Delle 7 NE falls on 24 May and the median first autumn frost on 18 September, which leaves a median of 122 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 La Delle 7 NE
Measure
Median, all years
Earliest period
Recent period (1928 to 1964)
Recent against earliest
Fitted trend
Last spring frost
24 May
n/a
24 May
n/a
+0.2 days per decade
First autumn frost
18 September
n/a
16 September
n/a
-1.1 days per decade
Growing days
122 days
n/a
116 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
60 years, 1897 to 1966
A day with at least 51.7 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 124.5 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at La Delle 7 NE: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.7 mm (2.0 in)
5 years
70.9 mm (2.8 in)
10 years
83.7 mm (3.3 in)
25 years
100.0 mm (3.9 in)
50 years
112.3 mm (4.4 in)
100 years
124.5 mm (4.9 in)
Longer than the 60 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, 60 years of values from 1897 to 1966.
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: 118.9 mm (4.7 in) in 1905; 101.6 mm (4.0 in) in 1946; 99.1 mm (3.9 in) in 1943.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of La Delle 7 NE, at 1935 and 1950. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1935 ran 0.3 C (0.6 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1950 ran 0.3 C (0.5 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at La Delle 7 NE, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1935
-0.3
-0.6
likely
5
1950
+0.3
+0.5
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
Data for La Delle 7 NE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for La Delle 7 NE 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.