Record envelope, standing records and threshold days for Wilton (USC00329455), North Dakota, United States, with 85 years of record.
Key Facts for Wilton
Wilton (USC00329455) is a weather station in North Dakota, United States at 47.16 latitude and -100.79 longitude, 667 m (2,188 ft) above sea level.
The station reports from 1927 to 2011, 85 years of record.
1,464 records set at Wilton still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wilton set a daily record high minimum temperature of 12.8 C (55.0 F) on 7 October 2011.
About the Station
Location: North Dakota, United States, 47.16 latitude, -100.79 longitude.
Elevation: 667 m (2,188 ft).
Period of record: 1927 to 2011, 85 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 Wilton. 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 Wilton, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.0 C (59.0 F)
-38.3 C (-36.9 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-20.0 C (-4.0 F)
n/a
n/a
May
37.2 C (99.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
41.1 C (106.0 F)
2.8 C (37.0 F)
n/a
n/a
Aug
42.8 C (109.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-7.8 C (18.0 F)
n/a
n/a
Oct
35.0 C (95.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-38.9 C (-38.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wilton still stand. 1991 holds the most, with 38.
Standing records at Wilton by the year they were set
Year set
Standing records
1927
24
1928
29
1929
23
1930
36
1931
7
1939
21
1940
16
1941
22
1942
32
1943
20
1944
10
1945
21
1946
20
1947
23
1948
16
1949
19
1950
36
1951
35
1952
19
1953
18
1954
19
1955
26
1956
12
1957
11
1958
26
1959
21
1960
9
1961
22
1962
26
1963
30
1964
10
1965
16
1966
14
1967
19
1968
25
1969
21
1970
13
1971
12
1972
24
1973
6
1974
8
1975
14
1976
14
1977
24
1978
17
1979
20
1980
20
1981
24
1982
13
1983
20
1984
13
1985
31
1986
23
1987
18
1988
35
1989
31
1990
17
1991
38
1992
27
1993
4
1994
24
1995
10
1996
18
1997
11
1998
6
1999
11
2000
15
2001
10
2002
21
2003
16
2004
12
2005
20
2006
13
2007
13
2008
8
2009
17
2010
8
2011
11
All-Time Record Progression
7 new records
7 all-time records were set at Wilton between 31 December 1967 and 3 January 2009. Each dot is a new record.
When Wilton set new all-time records
Date
Kind
Detail
1967-12-31
Record low minimum temperature
Record low minimum temperature -38.9 C (-38.0 F)
1983-12-24
Record low maximum temperature
Record low maximum temperature -32.2 C (-26.0 F)
1993-07-22
Record daily precipitation
Record daily precipitation 119.4 mm (4.7 in)
1993-11-24
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
1999-01-01
Record daily snowfall
Record daily snowfall 40.6 cm (16.0 in)
2008-12-30
Record snow depth
Record snow depth 96.5 cm (38.0 in)
2009-01-03
Record snow depth
Record snow depth 104.1 cm (41.0 in)
Wettest Day of Each Month
Jul: 119.4 mm (4.7 in)
The wettest day on record for each calendar month at Wilton. The most was 119.4 mm (4.7 in) on 22 July 1993.
Record daily precipitation for each month at Wilton
Month
Record daily precipitation (mm)
Date
Jan
13.0 mm (0.5 in)
9 January 2009
Feb
17.8 mm (0.7 in)
24 February 1930
Mar
43.2 mm (1.7 in)
23 March 2011
Apr
46.7 mm (1.8 in)
27 April 1964
May
86.4 mm (3.4 in)
12 May 1985
Jun
111.8 mm (4.4 in)
13 June 2000
Jul
119.4 mm (4.7 in)
22 July 1993
Aug
106.9 mm (4.2 in)
30 August 1951
Sep
78.7 mm (3.1 in)
24 September 1977
Oct
47.0 mm (1.9 in)
18 October 1994
Nov
38.1 mm (1.5 in)
9 November 1998
Dec
26.9 mm (1.1 in)
11 December 2010
Period of Record Coverage
1927 to 2011
Complete yearUnder 90 percent of days
78 years of record at Wilton, 1927 to 2011. 31 years have data for under 90 percent of days and are left out of rankings: 1931, 1939, 1953, 1956, 1957, 1964, 1965, 1973 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 47 complete years at Wilton, 1928 to 2010. Blue stripes are years cooler than the station's own mean of 4.5 C (40.1 F); red stripes are warmer. The coolest year was 1950, at 1.0 C (33.8 F), and the warmest was 1987, at 6.8 C (44.2 F). The strongest colour marks a difference of 3.5 C (6.3 F).
Annual mean temperature at Wilton as warming stripes, 1928 to 2010
Year
Annual mean temperature
Difference from the station mean
1928
5.2 C
+0.66 C
1929
4.5 C
+0.04 C
1930
5.5 C
+1.03 C
1940
4.7 C
+0.19 C
1941
5.6 C
+1.10 C
1942
4.6 C
+0.08 C
1943
3.5 C
-0.95 C
1944
4.3 C
-0.16 C
1945
3.5 C
-0.99 C
1946
4.7 C
+0.20 C
1947
4.5 C
+0.03 C
1948
4.0 C
-0.45 C
1949
3.6 C
-0.91 C
1950
1.0 C
-3.50 C
1951
1.4 C
-3.06 C
1952
4.6 C
+0.08 C
1953
5.5 C
+0.98 C
1955
4.0 C
-0.52 C
1958
4.7 C
+0.20 C
1959
4.9 C
+0.43 C
1960
4.8 C
+0.35 C
1961
5.7 C
+1.25 C
1962
5.2 C
+0.69 C
1967
3.7 C
-0.80 C
1968
3.7 C
-0.80 C
1969
3.5 C
-0.98 C
1970
3.6 C
-0.92 C
1971
4.0 C
-0.53 C
1972
3.1 C
-1.38 C
1975
4.1 C
-0.43 C
1978
3.4 C
-1.08 C
1980
4.8 C
+0.29 C
1981
5.8 C
+1.30 C
1983
4.6 C
+0.15 C
1986
4.7 C
+0.18 C
1987
6.8 C
+2.31 C
1988
5.6 C
+1.07 C
1991
5.7 C
+1.18 C
1993
4.5 C
+0.02 C
1994
4.9 C
+0.39 C
1995
4.9 C
+0.36 C
2001
6.1 C
+1.58 C
2004
5.0 C
+0.51 C
2006
6.7 C
+2.25 C
2008
4.1 C
-0.40 C
2009
3.2 C
-1.27 C
2010
4.6 C
+0.09 C
The fitted trend in annual mean temperature here over 1928 to 2010 is 0.10 C (-0.04 to 0.24) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Wilton
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.10 C (-0.04 to 0.24) per decade
0.2 F (-0.1 to 0.4) per decade
1928 to 2010
47
Not clearly different from zero
Mean daily maximum
-0.01 C (-0.18 to 0.16) per decade
-0.02 F (-0.32 to 0.28) per decade
1928 to 2010
47
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.6) per decade
1928 to 2010
47
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
1927 to 2011
Yearly extremes at Wilton: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
1941
36.7 C (98.1 F)
78
Coldest night (TNn)
-38.9 C (-38.0 F)
1967
-32.2 C (-26.0 F)
78
Wettest day (Rx1day)
119.4 mm (4.7 in)
1993
41.7 mm (1.6 in)
78
Wettest five days (Rx5day)
185.3 mm (7.3 in)
1951
60.9 mm (2.4 in)
78
Longest dry spell (CDD)
64 days
1999
31 days
78
Hottest day (TXx)
The hottest day of the year at Wilton, 1927 to 2011. The record is 42.8 C (109.0 F) in 1941, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Wilton by year
Year
Hottest day (TXx)
1927
34.4 C (93.9 F)
1928
35.6 C (96.1 F)
1929
40.6 C (105.1 F)
1930
39.4 C (102.9 F)
1931
15.0 C (59.0 F)
1939
38.9 C (102.0 F)
1940
35.6 C (96.1 F)
1941
42.8 C (109.0 F)
1942
32.8 C (91.0 F)
1943
31.7 C (89.1 F)
1944
33.3 C (91.9 F)
1945
37.2 C (99.0 F)
1946
37.8 C (100.0 F)
1947
38.9 C (102.0 F)
1948
38.3 C (100.9 F)
1949
40.0 C (104.0 F)
1950
32.8 C (91.0 F)
1951
36.1 C (97.0 F)
1952
36.1 C (97.0 F)
1953
36.7 C (98.1 F)
1954
35.0 C (95.0 F)
1955
37.2 C (99.0 F)
1956
35.0 C (95.0 F)
1957
37.8 C (100.0 F)
1958
41.7 C (107.1 F)
1959
39.4 C (102.9 F)
1960
38.9 C (102.0 F)
1961
40.6 C (105.1 F)
1962
34.4 C (93.9 F)
1963
36.7 C (98.1 F)
1964
33.9 C (93.0 F)
1965
34.4 C (93.9 F)
1966
35.0 C (95.0 F)
1967
35.6 C (96.1 F)
1968
35.0 C (95.0 F)
1969
36.1 C (97.0 F)
1970
37.2 C (99.0 F)
1971
38.3 C (100.9 F)
1972
36.1 C (97.0 F)
1973
40.0 C (104.0 F)
1974
35.6 C (96.1 F)
1975
38.3 C (100.9 F)
1976
38.3 C (100.9 F)
1977
37.2 C (99.0 F)
1978
39.4 C (102.9 F)
1979
33.9 C (93.0 F)
1980
38.3 C (100.9 F)
1981
36.7 C (98.1 F)
1982
36.7 C (98.1 F)
1983
38.9 C (102.0 F)
1984
37.8 C (100.0 F)
1985
35.6 C (96.1 F)
1986
35.6 C (96.1 F)
1987
35.6 C (96.1 F)
1988
41.1 C (106.0 F)
1989
37.8 C (100.0 F)
1990
35.0 C (95.0 F)
1991
37.2 C (99.0 F)
1992
37.2 C (99.0 F)
1993
31.7 C (89.1 F)
1994
34.4 C (93.9 F)
1995
36.1 C (97.0 F)
1996
33.3 C (91.9 F)
1997
32.2 C (90.0 F)
1998
33.9 C (93.0 F)
1999
35.6 C (96.1 F)
2000
36.7 C (98.1 F)
2001
37.8 C (100.0 F)
2002
40.6 C (105.1 F)
2003
38.9 C (102.0 F)
2004
35.6 C (96.1 F)
2005
35.6 C (96.1 F)
2006
37.2 C (99.0 F)
2007
37.2 C (99.0 F)
2008
34.4 C (93.9 F)
2009
31.7 C (89.1 F)
2010
37.2 C (99.0 F)
2011
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Wilton, 1927 to 2011. The record is -38.9 C (-38.0 F) in 1967, marked on the chart; the median year is -32.2 C (-26.0 F).
Coldest night (TNn) at Wilton by year
Year
Coldest night (TNn)
1927
-34.4 C (-29.9 F)
1928
-32.2 C (-26.0 F)
1929
-35.0 C (-31.0 F)
1930
-34.4 C (-29.9 F)
1931
-25.6 C (-14.1 F)
1939
-17.8 C (0.0 F)
1940
-31.7 C (-25.1 F)
1941
-31.1 C (-24.0 F)
1942
-33.9 C (-29.0 F)
1943
-37.8 C (-36.0 F)
1944
-31.7 C (-25.1 F)
1945
-32.8 C (-27.0 F)
1946
-31.7 C (-25.1 F)
1947
-31.7 C (-25.1 F)
1948
-33.3 C (-27.9 F)
1949
-35.0 C (-31.0 F)
1950
-38.3 C (-36.9 F)
1951
-36.1 C (-33.0 F)
1952
-32.2 C (-26.0 F)
1953
-30.0 C (-22.0 F)
1954
-35.6 C (-32.1 F)
1955
-35.0 C (-31.0 F)
1956
-24.4 C (-11.9 F)
1957
-35.6 C (-32.1 F)
1958
-31.1 C (-24.0 F)
1959
-33.3 C (-27.9 F)
1960
-28.9 C (-20.0 F)
1961
-35.6 C (-32.1 F)
1962
-36.7 C (-34.1 F)
1963
-34.4 C (-29.9 F)
1964
-31.1 C (-24.0 F)
1965
-32.2 C (-26.0 F)
1966
-37.2 C (-35.0 F)
1967
-38.9 C (-38.0 F)
1968
-37.2 C (-35.0 F)
1969
-31.7 C (-25.1 F)
1970
-34.4 C (-29.9 F)
1971
-33.3 C (-27.9 F)
1972
-35.6 C (-32.1 F)
1973
-27.8 C (-18.0 F)
1974
-18.9 C (-2.0 F)
1975
-29.4 C (-20.9 F)
1976
-32.2 C (-26.0 F)
1977
-33.3 C (-27.9 F)
1978
-31.7 C (-25.1 F)
1979
-34.4 C (-29.9 F)
1980
-32.8 C (-27.0 F)
1981
-30.0 C (-22.0 F)
1982
-35.6 C (-32.1 F)
1983
-37.8 C (-36.0 F)
1984
-33.3 C (-27.9 F)
1985
-35.6 C (-32.1 F)
1986
-31.7 C (-25.1 F)
1987
-23.3 C (-9.9 F)
1988
-32.8 C (-27.0 F)
1989
-37.2 C (-35.0 F)
1990
-36.7 C (-34.1 F)
1991
-27.2 C (-17.0 F)
1992
-31.1 C (-24.0 F)
1993
-30.6 C (-23.1 F)
1994
-36.1 C (-33.0 F)
1995
-27.8 C (-18.0 F)
1996
-37.8 C (-36.0 F)
1997
-32.8 C (-27.0 F)
1998
-30.0 C (-22.0 F)
1999
-31.7 C (-25.1 F)
2000
-28.9 C (-20.0 F)
2001
-26.7 C (-16.1 F)
2002
-22.8 C (-9.0 F)
2003
-31.1 C (-24.0 F)
2004
-34.4 C (-29.9 F)
2005
-33.3 C (-27.9 F)
2006
-31.1 C (-24.0 F)
2007
-30.0 C (-22.0 F)
2008
-32.2 C (-26.0 F)
2009
-32.2 C (-26.0 F)
2010
-31.1 C (-24.0 F)
2011
-28.9 C (-20.0 F)
Wettest day (Rx1day)
The wettest day of the year at Wilton, 1927 to 2011. The record is 119.4 mm (4.7 in) in 1993, marked on the chart; the median year is 41.7 mm (1.6 in).
Wettest day (Rx1day) at Wilton by year
Year
Wettest day (Rx1day)
1927
69.9 mm (2.8 in)
1928
76.5 mm (3.0 in)
1929
37.6 mm (1.5 in)
1930
36.1 mm (1.4 in)
1931
1.8 mm (0.07 in)
1939
24.4 mm (1.0 in)
1940
40.4 mm (1.6 in)
1941
34.8 mm (1.4 in)
1942
26.9 mm (1.1 in)
1943
66.0 mm (2.6 in)
1944
68.6 mm (2.7 in)
1945
24.4 mm (1.0 in)
1946
22.4 mm (0.9 in)
1947
27.9 mm (1.1 in)
1948
31.2 mm (1.2 in)
1949
41.9 mm (1.6 in)
1950
40.1 mm (1.6 in)
1951
106.9 mm (4.2 in)
1952
83.1 mm (3.3 in)
1953
46.2 mm (1.8 in)
1954
33.8 mm (1.3 in)
1955
30.0 mm (1.2 in)
1956
43.2 mm (1.7 in)
1957
43.2 mm (1.7 in)
1958
26.9 mm (1.1 in)
1959
30.0 mm (1.2 in)
1960
66.8 mm (2.6 in)
1961
26.7 mm (1.1 in)
1962
66.0 mm (2.6 in)
1963
68.6 mm (2.7 in)
1964
52.1 mm (2.1 in)
1965
61.0 mm (2.4 in)
1966
39.9 mm (1.6 in)
1967
30.5 mm (1.2 in)
1968
48.3 mm (1.9 in)
1969
34.3 mm (1.4 in)
1970
63.8 mm (2.5 in)
1971
44.7 mm (1.8 in)
1972
41.4 mm (1.6 in)
1973
41.4 mm (1.6 in)
1974
23.1 mm (0.9 in)
1975
39.9 mm (1.6 in)
1976
49.8 mm (2.0 in)
1977
78.7 mm (3.1 in)
1978
69.9 mm (2.8 in)
1979
23.9 mm (0.9 in)
1980
68.6 mm (2.7 in)
1981
43.4 mm (1.7 in)
1982
46.0 mm (1.8 in)
1983
54.1 mm (2.1 in)
1984
33.0 mm (1.3 in)
1985
86.4 mm (3.4 in)
1986
32.3 mm (1.3 in)
1987
36.6 mm (1.4 in)
1988
38.9 mm (1.5 in)
1989
28.7 mm (1.1 in)
1990
46.2 mm (1.8 in)
1991
25.7 mm (1.0 in)
1992
26.9 mm (1.1 in)
1993
119.4 mm (4.7 in)
1994
47.0 mm (1.9 in)
1995
27.9 mm (1.1 in)
1996
49.5 mm (1.9 in)
1997
43.2 mm (1.7 in)
1998
38.1 mm (1.5 in)
1999
77.7 mm (3.1 in)
2000
111.8 mm (4.4 in)
2001
44.5 mm (1.8 in)
2002
40.1 mm (1.6 in)
2003
40.1 mm (1.6 in)
2004
38.1 mm (1.5 in)
2005
50.8 mm (2.0 in)
2006
34.0 mm (1.3 in)
2007
69.9 mm (2.8 in)
2008
34.3 mm (1.4 in)
2009
44.5 mm (1.8 in)
2010
64.3 mm (2.5 in)
2011
43.2 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wilton, 1927 to 2011. The record is 185.3 mm (7.3 in) in 1951, marked on the chart; the median year is 60.9 mm (2.4 in).
Wettest five days (Rx5day) at Wilton by year
Year
Wettest five days (Rx5day)
1927
107.8 mm (4.2 in)
1928
86.4 mm (3.4 in)
1929
50.8 mm (2.0 in)
1930
37.4 mm (1.5 in)
1931
1.8 mm (0.07 in)
1939
47.8 mm (1.9 in)
1940
54.7 mm (2.2 in)
1941
77.3 mm (3.0 in)
1942
39.4 mm (1.6 in)
1943
117.6 mm (4.6 in)
1944
73.7 mm (2.9 in)
1945
43.2 mm (1.7 in)
1946
49.8 mm (2.0 in)
1947
53.6 mm (2.1 in)
1948
46.4 mm (1.8 in)
1949
45.2 mm (1.8 in)
1950
41.4 mm (1.6 in)
1951
185.3 mm (7.3 in)
1952
110.3 mm (4.3 in)
1953
88.5 mm (3.5 in)
1954
54.1 mm (2.1 in)
1955
71.8 mm (2.8 in)
1956
72.9 mm (2.9 in)
1957
110.1 mm (4.3 in)
1958
49.3 mm (1.9 in)
1959
47.5 mm (1.9 in)
1960
93.9 mm (3.7 in)
1961
40.9 mm (1.6 in)
1962
95.4 mm (3.8 in)
1963
80.3 mm (3.2 in)
1964
67.1 mm (2.6 in)
1965
153.0 mm (6.0 in)
1966
61.0 mm (2.4 in)
1967
42.6 mm (1.7 in)
1968
75.2 mm (3.0 in)
1969
66.5 mm (2.6 in)
1970
74.4 mm (2.9 in)
1971
70.6 mm (2.8 in)
1972
51.3 mm (2.0 in)
1973
54.9 mm (2.2 in)
1974
27.4 mm (1.1 in)
1975
54.9 mm (2.2 in)
1976
104.9 mm (4.1 in)
1977
109.5 mm (4.3 in)
1978
90.0 mm (3.5 in)
1979
36.4 mm (1.4 in)
1980
121.5 mm (4.8 in)
1981
71.9 mm (2.8 in)
1982
108.8 mm (4.3 in)
1983
90.5 mm (3.6 in)
1984
59.4 mm (2.3 in)
1985
90.2 mm (3.6 in)
1986
43.7 mm (1.7 in)
1987
57.9 mm (2.3 in)
1988
43.5 mm (1.7 in)
1989
45.2 mm (1.8 in)
1990
67.5 mm (2.7 in)
1991
46.5 mm (1.8 in)
1992
45.2 mm (1.8 in)
1993
143.6 mm (5.7 in)
1994
91.8 mm (3.6 in)
1995
60.8 mm (2.4 in)
1996
61.4 mm (2.4 in)
1997
43.2 mm (1.7 in)
1998
40.7 mm (1.6 in)
1999
130.0 mm (5.1 in)
2000
157.3 mm (6.2 in)
2001
74.3 mm (2.9 in)
2002
42.6 mm (1.7 in)
2003
71.6 mm (2.8 in)
2004
58.4 mm (2.3 in)
2005
57.2 mm (2.3 in)
2006
36.3 mm (1.4 in)
2007
105.5 mm (4.2 in)
2008
50.8 mm (2.0 in)
2009
49.3 mm (1.9 in)
2010
78.5 mm (3.1 in)
2011
54.6 mm (2.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wilton, 1927 to 2011. The record is 64 days in 1999, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Wilton by year
Year
Longest dry spell (CDD)
1927
46 days
1928
31 days
1929
14 days
1930
31 days
1931
15 days
1939
26 days
1940
36 days
1941
41 days
1942
53 days
1943
41 days
1944
46 days
1945
29 days
1946
46 days
1947
39 days
1948
31 days
1949
24 days
1950
19 days
1951
30 days
1952
58 days
1953
26 days
1954
29 days
1955
28 days
1956
15 days
1957
29 days
1958
31 days
1959
36 days
1960
46 days
1961
52 days
1962
29 days
1963
38 days
1964
29 days
1965
42 days
1966
27 days
1967
26 days
1968
31 days
1969
41 days
1970
24 days
1971
37 days
1972
32 days
1973
20 days
1974
41 days
1975
19 days
1976
37 days
1977
53 days
1978
25 days
1979
39 days
1980
49 days
1981
29 days
1982
25 days
1983
25 days
1984
28 days
1985
32 days
1986
43 days
1987
48 days
1988
38 days
1989
50 days
1990
44 days
1991
30 days
1992
30 days
1993
59 days
1994
37 days
1995
23 days
1996
23 days
1997
40 days
1998
55 days
1999
64 days
2000
37 days
2001
35 days
2002
26 days
2003
18 days
2004
25 days
2005
28 days
2006
40 days
2007
31 days
2008
16 days
2009
25 days
2010
28 days
2011
16 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
47 years with a frost
Across 47 years with a frost, the median last spring frost at Wilton falls on 13 May and the median first autumn frost on 22 September, which leaves a median of 132 days between them.
Fitted over all years, the growing season changes by +3.6 days per decade at this station.
Frost dates and growing season at Wilton
Measure
Median, all years
Earliest period
Recent period (1955 to 2010)
Recent against earliest
Fitted trend
Last spring frost
13 May
n/a
12 May
n/a
-2.1 days per decade
First autumn frost
22 September
n/a
24 September
n/a
+1.5 days per decade
Growing days
132 days
n/a
136 days
n/a
+3.6 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
59 years, 1940 to 2010
A day with at least 41.9 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 126.8 mm (5.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Wilton: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
41.9 mm (1.6 in)
5 years
59.5 mm (2.3 in)
10 years
73.0 mm (2.9 in)
25 years
92.3 mm (3.6 in)
50 years
108.7 mm (4.3 in)
100 years
126.8 mm (5.0 in)
Longer than the 59 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, 59 years of values from 1940 to 2010.
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: 119.4 mm (4.7 in) in 1993; 106.9 mm (4.2 in) in 1951; 86.4 mm (3.4 in) in 1985.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Wilton, at 1952. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1952 ran 0.4 C (0.8 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Wilton, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1952
+0.4
+0.8
possible
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 Wilton standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wilton 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.