Record envelope, standing records and threshold days for Wilmot (USC00399337), South Dakota, United States, with 84 years of record.
Key Facts for Wilmot
Wilmot (USC00399337) is a weather station in South Dakota, United States at 45.41 latitude and -96.86 longitude, 366 m (1,201 ft) above sea level.
The station reports from 1943 to 2026, 84 years of record.
1,464 records set at Wilmot still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Wilmot set a daily record precipitation of 104.6 mm (4.1 in) on 31 July 2026.
About the Station
Location: South Dakota, United States, 45.41 latitude, -96.86 longitude.
Elevation: 366 m (1,201 ft).
Period of record: 1943 to 2026, 84 years.
Eligible elements: prcp, snow, snwd.
Daily Record Envelope and 2026
44 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 Wilmot. The lines show the 2026 daily maximum and minimum. 44 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Wilmot, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-35.0 C (-31.0 F)
10.6 C (51.1 F)
-28.3 C (-18.9 F)
Feb
17.8 C (64.0 F)
-32.8 C (-27.0 F)
16.7 C (62.1 F)
-21.1 C (-6.0 F)
Mar
28.3 C (82.9 F)
-32.8 C (-27.0 F)
23.3 C (73.9 F)
-18.3 C (-0.9 F)
Apr
33.9 C (93.0 F)
-17.8 C (0.0 F)
33.9 C (93.0 F)
-11.1 C (12.0 F)
May
38.3 C (100.9 F)
-5.0 C (23.0 F)
34.4 C (93.9 F)
-3.9 C (25.0 F)
Jun
38.9 C (102.0 F)
2.2 C (36.0 F)
33.9 C (93.0 F)
8.3 C (46.9 F)
Jul
40.6 C (105.1 F)
7.2 C (45.0 F)
37.8 C (100.0 F)
12.2 C (54.0 F)
Aug
37.8 C (100.0 F)
2.8 C (37.0 F)
31.1 C (88.0 F)
9.4 C (48.9 F)
Sep
36.7 C (98.1 F)
-1.7 C (28.9 F)
35.6 C (96.1 F)
7.2 C (45.0 F)
Oct
34.4 C (93.9 F)
-12.2 C (10.0 F)
28.9 C (84.0 F)
3.3 C (37.9 F)
Nov
26.1 C (79.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Wilmot still stand. 2009 holds the most, with 91.
Standing records at Wilmot by the year they were set
Year set
Standing records
2005
15
2006
69
2007
78
2008
55
2009
91
2010
52
2011
65
2012
85
2013
83
2014
64
2015
77
2016
47
2017
87
2018
82
2019
66
2020
67
2021
84
2022
55
2023
55
2024
62
2025
73
2026
52
All-Time Record Progression
4 new records
4 all-time records were set at Wilmot between 4 March 1985 and 13 June 2025. Each dot is a new record.
When Wilmot set new all-time records
Date
Kind
Detail
1985-03-04
Record daily snowfall
Record daily snowfall 55.9 cm (22.0 in)
2006-09-02
Record daily precipitation
Record daily precipitation 105.4 mm (4.1 in)
2016-07-11
Record daily precipitation
Record daily precipitation 107.2 mm (4.2 in)
2025-06-13
Record daily precipitation
Record daily precipitation 142.2 mm (5.6 in)
Wettest Day of Each Month
Jun: 142.2 mm (5.6 in)
The wettest day on record for each calendar month at Wilmot. The most was 142.2 mm (5.6 in) on 13 June 2025.
Record daily precipitation for each month at Wilmot
Month
Record daily precipitation (mm)
Date
Jan
45.7 mm (1.8 in)
4 January 1997
Feb
38.1 mm (1.5 in)
29 February 2012
Mar
56.4 mm (2.2 in)
12 March 1977
Apr
74.9 mm (2.9 in)
14 April 1986
May
94.0 mm (3.7 in)
16 May 1969
Jun
142.2 mm (5.6 in)
13 June 2025
Jul
107.2 mm (4.2 in)
11 July 2016
Aug
105.9 mm (4.2 in)
14 August 2023
Sep
105.4 mm (4.1 in)
2 September 2006
Oct
69.1 mm (2.7 in)
15 October 2013
Nov
45.0 mm (1.8 in)
19 November 2024
Dec
31.2 mm (1.2 in)
26 December 2023
Period of Record Coverage
2005 to 2026
Complete yearUnder 90 percent of days
22 years of record at Wilmot, 2005 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 2005, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Wilmot, 2006 to 2025. Blue stripes are years cooler than the station's own mean of 6.5 C (43.6 F); red stripes are warmer. The coolest year was 2009, at 4.4 C (40.0 F), and the warmest was 2012, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Wilmot as warming stripes, 2006 to 2025
Year
Annual mean temperature
Difference from the station mean
2006
7.8 C
+1.31 C
2007
6.4 C
-0.11 C
2008
4.7 C
-1.82 C
2009
4.4 C
-2.04 C
2010
6.3 C
-0.20 C
2011
6.2 C
-0.29 C
2012
8.3 C
+1.80 C
2013
4.8 C
-1.72 C
2014
5.0 C
-1.47 C
2015
7.5 C
+0.98 C
2016
7.9 C
+1.40 C
2017
6.9 C
+0.47 C
2018
5.6 C
-0.83 C
2019
4.7 C
-1.74 C
2020
7.0 C
+0.56 C
2021
7.8 C
+1.31 C
2022
5.8 C
-0.72 C
2023
7.1 C
+0.67 C
2024
8.2 C
+1.68 C
2025
7.2 C
+0.75 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1943 to 2026
Yearly extremes at Wilmot: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
2006
36.7 C (98.1 F)
22
Coldest night (TNn)
-35.0 C (-31.0 F)
2019
-29.1 C (-20.5 F)
22
Wettest day (Rx1day)
142.2 mm (5.6 in)
2025
52.1 mm (2.1 in)
84
Wettest five days (Rx5day)
170.6 mm (6.7 in)
2025
77.9 mm (3.1 in)
84
Longest dry spell (CDD)
66 days
2006
31 days
84
Hottest day (TXx)
The hottest day of the year at Wilmot, 1943 to 2026. The record is 40.6 C (105.1 F) in 2006, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Wilmot by year
Year
Hottest day (TXx)
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
20.0 C (68.0 F)
2006
40.6 C (105.1 F)
2007
36.7 C (98.1 F)
2008
33.3 C (91.9 F)
2009
35.6 C (96.1 F)
2010
35.0 C (95.0 F)
2011
37.2 C (99.0 F)
2012
36.7 C (98.1 F)
2013
35.0 C (95.0 F)
2014
33.3 C (91.9 F)
2015
36.7 C (98.1 F)
2016
36.1 C (97.0 F)
2017
36.1 C (97.0 F)
2018
38.3 C (100.9 F)
2019
34.4 C (93.9 F)
2020
36.7 C (98.1 F)
2021
38.9 C (102.0 F)
2022
38.3 C (100.9 F)
2023
38.9 C (102.0 F)
2024
34.4 C (93.9 F)
2025
37.2 C (99.0 F)
2026
37.8 C (100.0 F)
Coldest night (TNn)
The coldest night of the year at Wilmot, 1943 to 2026. The record is -35.0 C (-31.0 F) in 2019, marked on the chart; the median year is -29.1 C (-20.5 F).
Coldest night (TNn) at Wilmot by year
Year
Coldest night (TNn)
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
n/a
1988
n/a
1989
n/a
1990
n/a
1991
n/a
1992
n/a
1993
n/a
1994
n/a
1995
n/a
1996
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2004
n/a
2005
-23.3 C (-9.9 F)
2006
-26.1 C (-15.0 F)
2007
-28.9 C (-20.0 F)
2008
-30.0 C (-22.0 F)
2009
-32.8 C (-27.0 F)
2010
-33.9 C (-29.0 F)
2011
-29.4 C (-20.9 F)
2012
-25.6 C (-14.1 F)
2013
-28.9 C (-20.0 F)
2014
-30.0 C (-22.0 F)
2015
-26.1 C (-15.0 F)
2016
-29.4 C (-20.9 F)
2017
-32.8 C (-27.0 F)
2018
-32.8 C (-27.0 F)
2019
-35.0 C (-31.0 F)
2020
-28.3 C (-18.9 F)
2021
-30.6 C (-23.1 F)
2022
-31.7 C (-25.1 F)
2023
-27.2 C (-17.0 F)
2024
-26.7 C (-16.1 F)
2025
-28.9 C (-20.0 F)
2026
-28.3 C (-18.9 F)
Wettest day (Rx1day)
The wettest day of the year at Wilmot, 1943 to 2026. The record is 142.2 mm (5.6 in) in 2025, marked on the chart; the median year is 52.1 mm (2.1 in).
Wettest day (Rx1day) at Wilmot by year
Year
Wettest day (Rx1day)
1943
52.6 mm (2.1 in)
1944
84.8 mm (3.3 in)
1945
55.4 mm (2.2 in)
1946
61.0 mm (2.4 in)
1947
31.8 mm (1.3 in)
1948
76.2 mm (3.0 in)
1949
73.2 mm (2.9 in)
1950
33.0 mm (1.3 in)
1951
85.3 mm (3.4 in)
1952
74.7 mm (2.9 in)
1953
41.9 mm (1.6 in)
1954
33.3 mm (1.3 in)
1955
54.1 mm (2.1 in)
1956
47.5 mm (1.9 in)
1957
85.6 mm (3.4 in)
1958
26.9 mm (1.1 in)
1959
38.1 mm (1.5 in)
1960
41.4 mm (1.6 in)
1961
54.6 mm (2.1 in)
1962
59.2 mm (2.3 in)
1963
47.8 mm (1.9 in)
1964
37.6 mm (1.5 in)
1965
60.5 mm (2.4 in)
1966
87.6 mm (3.4 in)
1967
35.6 mm (1.4 in)
1968
45.7 mm (1.8 in)
1969
94.0 mm (3.7 in)
1970
37.1 mm (1.5 in)
1971
92.7 mm (3.6 in)
1972
59.7 mm (2.4 in)
1973
88.9 mm (3.5 in)
1974
32.8 mm (1.3 in)
1975
32.8 mm (1.3 in)
1976
32.3 mm (1.3 in)
1977
56.4 mm (2.2 in)
1978
61.5 mm (2.4 in)
1979
36.8 mm (1.4 in)
1980
50.8 mm (2.0 in)
1981
65.3 mm (2.6 in)
1982
32.8 mm (1.3 in)
1983
52.1 mm (2.1 in)
1984
68.6 mm (2.7 in)
1985
33.0 mm (1.3 in)
1986
74.9 mm (2.9 in)
1987
39.4 mm (1.6 in)
1988
68.6 mm (2.7 in)
1989
66.0 mm (2.6 in)
1990
61.0 mm (2.4 in)
1991
57.9 mm (2.3 in)
1992
47.2 mm (1.9 in)
1993
32.3 mm (1.3 in)
1994
81.3 mm (3.2 in)
1995
40.1 mm (1.6 in)
1996
45.7 mm (1.8 in)
1997
49.8 mm (2.0 in)
1998
53.3 mm (2.1 in)
1999
28.7 mm (1.1 in)
2000
31.0 mm (1.2 in)
2001
58.4 mm (2.3 in)
2002
46.2 mm (1.8 in)
2003
66.0 mm (2.6 in)
2004
39.9 mm (1.6 in)
2005
38.4 mm (1.5 in)
2006
105.4 mm (4.1 in)
2007
51.3 mm (2.0 in)
2008
73.7 mm (2.9 in)
2009
52.1 mm (2.1 in)
2010
46.2 mm (1.8 in)
2011
66.3 mm (2.6 in)
2012
38.1 mm (1.5 in)
2013
75.7 mm (3.0 in)
2014
40.9 mm (1.6 in)
2015
64.0 mm (2.5 in)
2016
107.2 mm (4.2 in)
2017
42.2 mm (1.7 in)
2018
35.6 mm (1.4 in)
2019
50.8 mm (2.0 in)
2020
44.5 mm (1.8 in)
2021
59.7 mm (2.4 in)
2022
43.4 mm (1.7 in)
2023
105.9 mm (4.2 in)
2024
46.7 mm (1.8 in)
2025
142.2 mm (5.6 in)
2026
104.6 mm (4.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Wilmot, 1943 to 2026. The record is 170.6 mm (6.7 in) in 2025, marked on the chart; the median year is 77.9 mm (3.1 in).
Wettest five days (Rx5day) at Wilmot by year
Year
Wettest five days (Rx5day)
1943
49.0 mm (1.9 in)
1944
25.9 mm (1.0 in)
1945
38.2 mm (1.5 in)
1946
88.7 mm (3.5 in)
1947
53.2 mm (2.1 in)
1948
94.7 mm (3.7 in)
1949
132.3 mm (5.2 in)
1950
41.6 mm (1.6 in)
1951
96.0 mm (3.8 in)
1952
86.4 mm (3.4 in)
1953
79.0 mm (3.1 in)
1954
71.1 mm (2.8 in)
1955
63.5 mm (2.5 in)
1956
85.2 mm (3.4 in)
1957
99.9 mm (3.9 in)
1958
41.0 mm (1.6 in)
1959
51.2 mm (2.0 in)
1960
46.0 mm (1.8 in)
1961
64.3 mm (2.5 in)
1962
116.1 mm (4.6 in)
1963
125.2 mm (4.9 in)
1964
58.7 mm (2.3 in)
1965
85.1 mm (3.4 in)
1966
99.8 mm (3.9 in)
1967
65.6 mm (2.6 in)
1968
75.5 mm (3.0 in)
1969
94.0 mm (3.7 in)
1970
69.1 mm (2.7 in)
1971
92.7 mm (3.6 in)
1972
59.7 mm (2.4 in)
1973
129.8 mm (5.1 in)
1974
69.4 mm (2.7 in)
1975
71.4 mm (2.8 in)
1976
34.8 mm (1.4 in)
1977
77.7 mm (3.1 in)
1978
81.8 mm (3.2 in)
1979
98.0 mm (3.9 in)
1980
74.2 mm (2.9 in)
1981
103.2 mm (4.1 in)
1982
53.6 mm (2.1 in)
1983
64.5 mm (2.5 in)
1984
108.8 mm (4.3 in)
1985
55.1 mm (2.2 in)
1986
111.5 mm (4.4 in)
1987
57.2 mm (2.3 in)
1988
82.1 mm (3.2 in)
1989
66.5 mm (2.6 in)
1990
79.2 mm (3.1 in)
1991
75.1 mm (3.0 in)
1992
87.6 mm (3.4 in)
1993
73.5 mm (2.9 in)
1994
103.1 mm (4.1 in)
1995
68.1 mm (2.7 in)
1996
78.7 mm (3.1 in)
1997
67.5 mm (2.7 in)
1998
83.8 mm (3.3 in)
1999
56.9 mm (2.2 in)
2000
54.1 mm (2.1 in)
2001
91.4 mm (3.6 in)
2002
86.1 mm (3.4 in)
2003
88.1 mm (3.5 in)
2004
63.3 mm (2.5 in)
2005
73.7 mm (2.9 in)
2006
107.0 mm (4.2 in)
2007
84.4 mm (3.3 in)
2008
78.1 mm (3.1 in)
2009
83.4 mm (3.3 in)
2010
61.2 mm (2.4 in)
2011
110.2 mm (4.3 in)
2012
54.4 mm (2.1 in)
2013
111.5 mm (4.4 in)
2014
64.5 mm (2.5 in)
2015
64.0 mm (2.5 in)
2016
131.8 mm (5.2 in)
2017
87.4 mm (3.4 in)
2018
64.8 mm (2.6 in)
2019
101.9 mm (4.0 in)
2020
55.2 mm (2.2 in)
2021
81.2 mm (3.2 in)
2022
61.9 mm (2.4 in)
2023
137.2 mm (5.4 in)
2024
61.2 mm (2.4 in)
2025
170.6 mm (6.7 in)
2026
106.2 mm (4.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Wilmot, 1943 to 2026. The record is 66 days in 2006, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Wilmot by year
Year
Longest dry spell (CDD)
1943
22 days
1944
33 days
1945
30 days
1946
19 days
1947
26 days
1948
36 days
1949
46 days
1950
35 days
1951
26 days
1952
56 days
1953
28 days
1954
30 days
1955
28 days
1956
38 days
1957
29 days
1958
38 days
1959
59 days
1960
31 days
1961
35 days
1962
38 days
1963
31 days
1964
41 days
1965
23 days
1966
35 days
1967
25 days
1968
40 days
1969
23 days
1970
57 days
1971
42 days
1972
32 days
1973
39 days
1974
31 days
1975
31 days
1976
37 days
1977
34 days
1978
34 days
1979
27 days
1980
45 days
1981
32 days
1982
25 days
1983
21 days
1984
31 days
1985
22 days
1986
38 days
1987
22 days
1988
24 days
1989
27 days
1990
43 days
1991
37 days
1992
38 days
1993
19 days
1994
25 days
1995
25 days
1996
22 days
1997
22 days
1998
41 days
1999
56 days
2000
20 days
2001
41 days
2002
36 days
2003
33 days
2004
25 days
2005
30 days
2006
66 days
2007
28 days
2008
31 days
2009
26 days
2010
28 days
2011
39 days
2012
28 days
2013
34 days
2014
19 days
2015
34 days
2016
24 days
2017
60 days
2018
39 days
2019
27 days
2020
38 days
2021
30 days
2022
27 days
2023
28 days
2024
53 days
2025
27 days
2026
33 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Wilmot falls on 7 May and the median first autumn frost on 8 October, which leaves a median of 154 days between them.
Frost dates and growing season at Wilmot
Measure
Median, all years
Earliest period
Recent period (2006 to 2025)
Recent against earliest
Fitted trend
Last spring frost
7 May
n/a
7 May
n/a
n/a
First autumn frost
8 October
n/a
8 October
n/a
n/a
Growing days
154 days
n/a
154 days
n/a
n/a
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
80 years, 1946 to 2025
A day with at least 51.2 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 135.3 mm (5.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Wilmot: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
51.2 mm (2.0 in)
5 years
70.4 mm (2.8 in)
10 years
84.3 mm (3.3 in)
25 years
103.5 mm (4.1 in)
50 years
118.9 mm (4.7 in)
100 years
135.3 mm (5.3 in)
Longer than the 80 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, 80 years of values from 1946 to 2025.
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: 142.2 mm (5.6 in) in 2025; 107.2 mm (4.2 in) in 2016; 105.9 mm (4.2 in) in 2023.
Download the Data
Data for Wilmot standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Wilmot 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.