Record envelope, standing records and threshold days for Ralph 1 N (USC00396907), South Dakota, United States, with 63 years of record.
Key Facts for Ralph 1 N
Ralph 1 N (USC00396907) is a weather station in South Dakota, United States at 45.78 latitude and -103.07 longitude, 850 m (2,790 ft) above sea level.
The station reports from 1941 to 2003, 63 years of record.
1,464 records set at Ralph 1 N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ralph 1 N set a daily record high maximum temperature of 41.7 C (107.1 F) on 25 July 2003.
About the Station
Location: South Dakota, United States, 45.78 latitude, -103.07 longitude.
Elevation: 850 m (2,790 ft).
Period of record: 1941 to 2003, 63 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 Ralph 1 N. 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 Ralph 1 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.6 C (69.1 F)
-41.1 C (-42.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Apr
35.0 C (95.0 F)
-22.2 C (-8.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
44.4 C (111.9 F)
0.0 C (32.0 F)
n/a
n/a
Aug
41.7 C (107.1 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
40.6 C (105.1 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ralph 1 N still stand. 1950 holds the most, with 46.
Standing records at Ralph 1 N by the year they were set
Year set
Standing records
1941
11
1942
28
1943
32
1944
18
1945
30
1946
23
1947
28
1948
25
1949
34
1950
46
1951
25
1952
33
1953
15
1954
22
1955
26
1956
22
1957
13
1958
26
1959
24
1960
24
1961
30
1962
24
1963
31
1964
15
1965
30
1966
19
1967
17
1968
18
1969
15
1970
14
1971
17
1972
33
1973
12
1974
23
1975
19
1976
23
1977
24
1978
17
1979
16
1980
27
1981
21
1982
9
1983
27
1984
12
1985
34
1986
30
1987
23
1988
37
1989
23
1990
29
1991
37
1992
39
1993
11
1994
21
1995
22
1996
24
1997
31
1998
21
1999
17
2000
24
2001
12
2002
18
2003
13
All-Time Record Progression
6 new records
6 all-time records were set at Ralph 1 N between 14 June 1976 and 5 April 1997. Each dot is a new record.
When Ralph 1 N set new all-time records
Date
Kind
Detail
1976-06-14
Record daily precipitation
Record daily precipitation 76.2 mm (3.0 in)
1981-07-07
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1984-09-23
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
1986-01-21
Record daily snowfall
Record daily snowfall 35.6 cm (14.0 in)
1987-03-21
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
1997-04-05
Record daily snowfall
Record daily snowfall 45.7 cm (18.0 in)
Wettest Day of Each Month
Jun: 76.2 mm (3.0 in)
The wettest day on record for each calendar month at Ralph 1 N. The most was 76.2 mm (3.0 in) on 14 June 1976.
Record daily precipitation for each month at Ralph 1 N
Month
Record daily precipitation (mm)
Date
Jan
24.1 mm (0.9 in)
21 January 1986
Feb
22.9 mm (0.9 in)
10 February 2000
Mar
45.0 mm (1.8 in)
21 March 1987
Apr
52.3 mm (2.1 in)
28 April 1975
May
66.0 mm (2.6 in)
26 May 1972
Jun
76.2 mm (3.0 in)
14 June 1976
Jul
46.2 mm (1.8 in)
14 July 1989
Aug
70.4 mm (2.8 in)
14 August 1976
Sep
59.7 mm (2.4 in)
20 September 1955
Oct
50.8 mm (2.0 in)
9 October 1982
Nov
33.8 mm (1.3 in)
1 November 2000
Dec
12.7 mm (0.5 in)
23 December 1972
Period of Record Coverage
1941 to 2003
Complete yearUnder 90 percent of days
63 years of record at Ralph 1 N, 1941 to 2003. 9 years have data for under 90 percent of days and are left out of rankings: 1941, 1951, 1964, 1973, 1974, 1980, 2001, 2002 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Ralph 1 N, 1942 to 2000. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1950, at 2.7 C (36.8 F), and the warmest was 1987, at 8.4 C (47.0 F). The strongest colour marks a difference of 3.4 C (6.1 F).
Annual mean temperature at Ralph 1 N as warming stripes, 1942 to 2000
Year
Annual mean temperature
Difference from the station mean
1942
5.7 C
-0.28 C
1944
4.8 C
-1.23 C
1945
4.8 C
-1.22 C
1946
6.9 C
+0.87 C
1947
5.0 C
-1.05 C
1948
5.1 C
-0.88 C
1949
4.7 C
-1.32 C
1950
2.7 C
-3.32 C
1952
5.0 C
-1.01 C
1953
6.5 C
+0.49 C
1954
6.4 C
+0.38 C
1955
5.3 C
-0.76 C
1956
6.0 C
-0.06 C
1957
5.6 C
-0.46 C
1958
6.1 C
+0.08 C
1959
5.7 C
-0.33 C
1960
5.5 C
-0.53 C
1961
6.8 C
+0.74 C
1962
5.8 C
-0.23 C
1963
6.9 C
+0.84 C
1965
4.7 C
-1.35 C
1966
5.1 C
-0.92 C
1967
5.9 C
-0.09 C
1968
5.7 C
-0.30 C
1969
5.5 C
-0.51 C
1971
5.3 C
-0.71 C
1972
5.3 C
-0.69 C
1975
5.3 C
-0.68 C
1976
7.4 C
+1.43 C
1977
6.8 C
+0.78 C
1978
4.7 C
-1.27 C
1979
5.3 C
-0.73 C
1981
8.2 C
+2.16 C
1982
5.3 C
-0.71 C
1983
6.6 C
+0.62 C
1984
6.6 C
+0.61 C
1985
5.5 C
-0.54 C
1986
7.0 C
+1.00 C
1987
8.4 C
+2.34 C
1988
7.7 C
+1.72 C
1989
6.0 C
-0.03 C
1990
7.7 C
+1.71 C
1991
7.6 C
+1.58 C
1992
7.3 C
+1.26 C
1993
4.9 C
-1.07 C
1994
6.5 C
+0.45 C
1995
6.5 C
+0.51 C
1996
4.4 C
-1.60 C
1997
6.6 C
+0.56 C
1998
7.4 C
+1.34 C
1999
7.9 C
+1.85 C
2000
6.7 C
+0.69 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.5) per decade over 1942 to 2000. In Fahrenheit: 0.6 F (0.3 to 0.9) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ralph 1 N
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.9) per decade
1942 to 2000
52
Rise
Mean daily maximum
0.15 C (-0.04 to 0.33) per decade
0.3 F (-0.1 to 0.6) per decade
1942 to 2000
52
Not clearly different from zero
Mean daily minimum
0.5 C (0.3 to 0.6) per decade
0.9 F (0.6 to 1.2) per decade
1942 to 2000
52
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
1941 to 2003
Yearly extremes at Ralph 1 N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
44.4 C (111.9 F)
1981
39.4 C (102.9 F)
63
Coldest night (TNn)
-41.1 C (-42.0 F)
1944
-34.4 C (-29.9 F)
63
Wettest day (Rx1day)
76.2 mm (3.0 in)
1976
36.1 mm (1.4 in)
63
Wettest five days (Rx5day)
124.4 mm (4.9 in)
1964
63.0 mm (2.5 in)
63
Longest dry spell (CDD)
109 days
1952
36 days
63
Hottest day (TXx)
The hottest day of the year at Ralph 1 N, 1941 to 2003. The record is 44.4 C (111.9 F) in 1981, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Ralph 1 N by year
Year
Hottest day (TXx)
1941
40.0 C (104.0 F)
1942
38.9 C (102.0 F)
1943
38.3 C (100.9 F)
1944
35.0 C (95.0 F)
1945
38.9 C (102.0 F)
1946
38.9 C (102.0 F)
1947
39.4 C (102.9 F)
1948
39.4 C (102.9 F)
1949
41.1 C (106.0 F)
1950
36.1 C (97.0 F)
1951
36.7 C (98.1 F)
1952
40.6 C (105.1 F)
1953
35.6 C (96.1 F)
1954
40.6 C (105.1 F)
1955
38.9 C (102.0 F)
1956
38.3 C (100.9 F)
1957
37.2 C (99.0 F)
1958
41.7 C (107.1 F)
1959
40.6 C (105.1 F)
1960
42.8 C (109.0 F)
1961
40.0 C (104.0 F)
1962
37.2 C (99.0 F)
1963
39.4 C (102.9 F)
1964
37.8 C (100.0 F)
1965
37.2 C (99.0 F)
1966
37.8 C (100.0 F)
1967
37.8 C (100.0 F)
1968
36.7 C (98.1 F)
1969
39.4 C (102.9 F)
1970
38.3 C (100.9 F)
1971
39.4 C (102.9 F)
1972
37.2 C (99.0 F)
1973
40.0 C (104.0 F)
1974
38.3 C (100.9 F)
1975
40.6 C (105.1 F)
1976
40.0 C (104.0 F)
1977
39.4 C (102.9 F)
1978
40.6 C (105.1 F)
1979
40.0 C (104.0 F)
1980
41.7 C (107.1 F)
1981
44.4 C (111.9 F)
1982
36.1 C (97.0 F)
1983
39.4 C (102.9 F)
1984
38.9 C (102.0 F)
1985
39.4 C (102.9 F)
1986
39.4 C (102.9 F)
1987
36.1 C (97.0 F)
1988
39.4 C (102.9 F)
1989
41.1 C (106.0 F)
1990
40.0 C (104.0 F)
1991
39.4 C (102.9 F)
1992
36.1 C (97.0 F)
1993
32.8 C (91.0 F)
1994
38.3 C (100.9 F)
1995
38.3 C (100.9 F)
1996
36.7 C (98.1 F)
1997
37.8 C (100.0 F)
1998
37.8 C (100.0 F)
1999
41.7 C (107.1 F)
2000
40.0 C (104.0 F)
2001
41.1 C (106.0 F)
2002
43.3 C (109.9 F)
2003
43.3 C (109.9 F)
Coldest night (TNn)
The coldest night of the year at Ralph 1 N, 1941 to 2003. The record is -41.1 C (-42.0 F) in 1944, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Ralph 1 N by year
Year
Coldest night (TNn)
1941
-21.7 C (-7.1 F)
1942
-36.7 C (-34.1 F)
1943
-38.3 C (-36.9 F)
1944
-41.1 C (-42.0 F)
1945
-33.3 C (-27.9 F)
1946
-35.0 C (-31.0 F)
1947
-33.3 C (-27.9 F)
1948
-37.2 C (-35.0 F)
1949
-41.1 C (-42.0 F)
1950
-40.6 C (-41.1 F)
1951
-37.8 C (-36.0 F)
1952
-34.4 C (-29.9 F)
1953
-31.1 C (-24.0 F)
1954
-40.0 C (-40.0 F)
1955
-35.0 C (-31.0 F)
1956
-34.4 C (-29.9 F)
1957
-37.2 C (-35.0 F)
1958
-31.1 C (-24.0 F)
1959
-32.8 C (-27.0 F)
1960
-33.3 C (-27.9 F)
1961
-30.0 C (-22.0 F)
1962
-32.2 C (-26.0 F)
1963
-35.6 C (-32.1 F)
1964
-32.8 C (-27.0 F)
1965
-31.1 C (-24.0 F)
1966
-37.2 C (-35.0 F)
1967
-31.1 C (-24.0 F)
1968
-33.3 C (-27.9 F)
1969
-35.6 C (-32.1 F)
1970
-38.3 C (-36.9 F)
1971
-33.3 C (-27.9 F)
1972
-37.2 C (-35.0 F)
1973
-31.7 C (-25.1 F)
1974
-34.4 C (-29.9 F)
1975
-32.2 C (-26.0 F)
1976
-37.8 C (-36.0 F)
1977
-40.0 C (-40.0 F)
1978
-34.4 C (-29.9 F)
1979
-35.6 C (-32.1 F)
1980
-32.2 C (-26.0 F)
1981
-28.9 C (-20.0 F)
1982
-35.6 C (-32.1 F)
1983
-36.7 C (-34.1 F)
1984
-32.2 C (-26.0 F)
1985
-34.4 C (-29.9 F)
1986
-29.4 C (-20.9 F)
1987
-22.8 C (-9.0 F)
1988
-36.1 C (-33.0 F)
1989
-38.3 C (-36.9 F)
1990
-36.7 C (-34.1 F)
1991
-31.1 C (-24.0 F)
1992
-31.1 C (-24.0 F)
1993
-31.7 C (-25.1 F)
1994
-38.3 C (-36.9 F)
1995
-31.1 C (-24.0 F)
1996
-37.8 C (-36.0 F)
1997
-31.1 C (-24.0 F)
1998
-36.7 C (-34.1 F)
1999
-31.1 C (-24.0 F)
2000
-30.0 C (-22.0 F)
2001
-30.0 C (-22.0 F)
2002
-26.7 C (-16.1 F)
2003
-23.9 C (-11.0 F)
Wettest day (Rx1day)
The wettest day of the year at Ralph 1 N, 1941 to 2003. The record is 76.2 mm (3.0 in) in 1976, marked on the chart; the median year is 36.1 mm (1.4 in).
Wettest day (Rx1day) at Ralph 1 N by year
Year
Wettest day (Rx1day)
1941
49.8 mm (2.0 in)
1942
36.3 mm (1.4 in)
1943
46.7 mm (1.8 in)
1944
59.2 mm (2.3 in)
1945
16.5 mm (0.6 in)
1946
39.4 mm (1.6 in)
1947
30.7 mm (1.2 in)
1948
29.2 mm (1.1 in)
1949
29.2 mm (1.1 in)
1950
25.9 mm (1.0 in)
1951
18.5 mm (0.7 in)
1952
28.7 mm (1.1 in)
1953
55.9 mm (2.2 in)
1954
31.8 mm (1.3 in)
1955
59.7 mm (2.4 in)
1956
61.0 mm (2.4 in)
1957
60.2 mm (2.4 in)
1958
40.9 mm (1.6 in)
1959
20.8 mm (0.8 in)
1960
33.5 mm (1.3 in)
1961
28.4 mm (1.1 in)
1962
58.4 mm (2.3 in)
1963
22.9 mm (0.9 in)
1964
70.1 mm (2.8 in)
1965
31.2 mm (1.2 in)
1966
29.2 mm (1.1 in)
1967
41.9 mm (1.6 in)
1968
21.1 mm (0.8 in)
1969
39.6 mm (1.6 in)
1970
33.8 mm (1.3 in)
1971
33.8 mm (1.3 in)
1972
66.0 mm (2.6 in)
1973
42.4 mm (1.7 in)
1974
23.9 mm (0.9 in)
1975
52.3 mm (2.1 in)
1976
76.2 mm (3.0 in)
1977
38.9 mm (1.5 in)
1978
38.9 mm (1.5 in)
1979
43.4 mm (1.7 in)
1980
29.7 mm (1.2 in)
1981
22.1 mm (0.9 in)
1982
50.8 mm (2.0 in)
1983
32.5 mm (1.3 in)
1984
43.9 mm (1.7 in)
1985
26.9 mm (1.1 in)
1986
36.1 mm (1.4 in)
1987
45.0 mm (1.8 in)
1988
63.8 mm (2.5 in)
1989
48.3 mm (1.9 in)
1990
26.2 mm (1.0 in)
1991
27.2 mm (1.1 in)
1992
28.2 mm (1.1 in)
1993
58.9 mm (2.3 in)
1994
43.7 mm (1.7 in)
1995
37.1 mm (1.5 in)
1996
47.0 mm (1.9 in)
1997
43.2 mm (1.7 in)
1998
34.3 mm (1.4 in)
1999
30.5 mm (1.2 in)
2000
35.6 mm (1.4 in)
2001
35.6 mm (1.4 in)
2002
33.8 mm (1.3 in)
2003
27.2 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ralph 1 N, 1941 to 2003. The record is 124.4 mm (4.9 in) in 1964, marked on the chart; the median year is 63.0 mm (2.5 in).
Wettest five days (Rx5day) at Ralph 1 N by year
Year
Wettest five days (Rx5day)
1941
72.1 mm (2.8 in)
1942
46.2 mm (1.8 in)
1943
83.8 mm (3.3 in)
1944
70.4 mm (2.8 in)
1945
35.2 mm (1.4 in)
1946
48.3 mm (1.9 in)
1947
74.6 mm (2.9 in)
1948
65.6 mm (2.6 in)
1949
48.0 mm (1.9 in)
1950
25.9 mm (1.0 in)
1951
34.0 mm (1.3 in)
1952
36.1 mm (1.4 in)
1953
85.1 mm (3.4 in)
1954
67.1 mm (2.6 in)
1955
83.8 mm (3.3 in)
1956
73.8 mm (2.9 in)
1957
72.4 mm (2.9 in)
1958
47.5 mm (1.9 in)
1959
30.2 mm (1.2 in)
1960
49.5 mm (1.9 in)
1961
35.3 mm (1.4 in)
1962
88.9 mm (3.5 in)
1963
45.2 mm (1.8 in)
1964
124.4 mm (4.9 in)
1965
53.4 mm (2.1 in)
1966
46.9 mm (1.8 in)
1967
70.7 mm (2.8 in)
1968
38.1 mm (1.5 in)
1969
53.8 mm (2.1 in)
1970
64.6 mm (2.5 in)
1971
58.4 mm (2.3 in)
1972
96.6 mm (3.8 in)
1973
73.7 mm (2.9 in)
1974
23.9 mm (0.9 in)
1975
73.0 mm (2.9 in)
1976
84.1 mm (3.3 in)
1977
81.8 mm (3.2 in)
1978
47.2 mm (1.9 in)
1979
49.8 mm (2.0 in)
1980
64.5 mm (2.5 in)
1981
38.6 mm (1.5 in)
1982
87.9 mm (3.5 in)
1983
55.1 mm (2.2 in)
1984
75.0 mm (3.0 in)
1985
38.4 mm (1.5 in)
1986
75.2 mm (3.0 in)
1987
68.6 mm (2.7 in)
1988
89.0 mm (3.5 in)
1989
107.5 mm (4.2 in)
1990
36.6 mm (1.4 in)
1991
42.6 mm (1.7 in)
1992
59.6 mm (2.3 in)
1993
80.8 mm (3.2 in)
1994
63.0 mm (2.5 in)
1995
69.6 mm (2.7 in)
1996
78.5 mm (3.1 in)
1997
62.5 mm (2.5 in)
1998
72.2 mm (2.8 in)
1999
36.6 mm (1.4 in)
2000
65.5 mm (2.6 in)
2001
51.6 mm (2.0 in)
2002
34.1 mm (1.3 in)
2003
42.4 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ralph 1 N, 1941 to 2003. The record is 109 days in 1952, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Ralph 1 N by year
Year
Longest dry spell (CDD)
1941
30 days
1942
49 days
1943
46 days
1944
45 days
1945
49 days
1946
74 days
1947
36 days
1948
45 days
1949
52 days
1950
50 days
1951
39 days
1952
109 days
1953
31 days
1954
55 days
1955
29 days
1956
89 days
1957
46 days
1958
51 days
1959
45 days
1960
48 days
1961
69 days
1962
42 days
1963
62 days
1964
21 days
1965
56 days
1966
25 days
1967
38 days
1968
31 days
1969
48 days
1970
27 days
1971
34 days
1972
41 days
1973
29 days
1974
35 days
1975
48 days
1976
34 days
1977
41 days
1978
28 days
1979
33 days
1980
53 days
1981
50 days
1982
18 days
1983
30 days
1984
28 days
1985
42 days
1986
27 days
1987
34 days
1988
28 days
1989
36 days
1990
33 days
1991
47 days
1992
46 days
1993
26 days
1994
26 days
1995
32 days
1996
26 days
1997
33 days
1998
33 days
1999
30 days
2000
28 days
2001
33 days
2002
40 days
2003
28 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
52 years with a frost
Across 52 years with a frost, the median last spring frost at Ralph 1 N falls on 26 May and the median first autumn frost on 12 September, which leaves a median of 109 days between them.
Fitted over all years, the growing season changes by +7.6 days per decade at this station.
Frost dates and growing season at Ralph 1 N
Measure
Median, all years
Earliest period
Recent period (1967 to 2000)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
20 May
n/a
-2.9 days per decade
First autumn frost
12 September
n/a
15 September
n/a
+4.7 days per decade
Growing days
109 days
n/a
114 days
n/a
+7.6 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
57 years, 1942 to 2001
A day with at least 36.6 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 81.3 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Ralph 1 N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.6 mm (1.4 in)
5 years
48.5 mm (1.9 in)
10 years
56.4 mm (2.2 in)
25 years
66.4 mm (2.6 in)
50 years
73.9 mm (2.9 in)
100 years
81.3 mm (3.2 in)
Longer than the 57 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, 57 years of values from 1942 to 2001.
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: 76.2 mm (3.0 in) in 1976; 66.0 mm (2.6 in) in 1972; 63.8 mm (2.5 in) in 1988.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Ralph 1 N, at 1969 and 1986. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1969 ran 0.5 C (1.0 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.2 C (0.4 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Ralph 1 N, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1969
+0.5
+1.0
likely
5
1986
-0.2
-0.4
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 Ralph 1 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ralph 1 N 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.