Record envelope, standing records and threshold days for Harrington (USC00393574), South Dakota, United States, with 48 years of record.
Key Facts for Harrington
Harrington (USC00393574) is a weather station in South Dakota, United States at 43.16 latitude and -101.26 longitude, 908 m (2,980 ft) above sea level.
The station reports from 1960 to 2007, 48 years of record.
1,464 records set at Harrington still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Harrington set a daily record high minimum temperature of 17.2 C (63.0 F) on 13 May 2007.
About the Station
Location: South Dakota, United States, 43.16 latitude, -101.26 longitude.
Elevation: 908 m (2,980 ft).
Period of record: 1960 to 2007, 48 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 Harrington. 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 Harrington, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-37.2 C (-35.0 F)
n/a
n/a
Mar
29.4 C (84.9 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-18.3 C (-0.9 F)
n/a
n/a
May
36.7 C (98.1 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
41.1 C (106.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
43.3 C (109.9 F)
2.2 C (36.0 F)
n/a
n/a
Aug
42.2 C (108.0 F)
1.1 C (34.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
37.2 C (99.0 F)
-18.9 C (-2.0 F)
n/a
n/a
Nov
28.9 C (84.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Dec
21.7 C (71.1 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 Harrington still stand. 1962 holds the most, with 53.
Standing records at Harrington by the year they were set
Year set
Standing records
1960
8
1961
29
1962
53
1963
32
1964
30
1965
41
1966
38
1967
37
1968
32
1969
39
1970
26
1971
19
1972
36
1973
36
1974
29
1975
28
1976
33
1977
19
1978
22
1979
30
1980
28
1981
19
1982
24
1983
39
1984
18
1985
45
1986
17
1987
39
1988
43
1989
43
1990
31
1991
36
1992
27
1993
24
1994
25
1995
35
1996
39
1997
38
1998
33
1999
20
2000
28
2001
23
2002
35
2003
25
2004
22
2005
31
2006
43
2007
17
All-Time Record Progression
2 new records
2 all-time records were set at Harrington between 11 April 1995 and 25 July 2003. Each dot is a new record.
When Harrington set new all-time records
Date
Kind
Detail
1995-04-11
Record daily snowfall
Record daily snowfall 38.1 cm (15.0 in)
2003-07-25
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
Wettest Day of Each Month
May: 78.0 mm (3.1 in)
The wettest day on record for each calendar month at Harrington. The most was 78.0 mm (3.1 in) on 17 May 1962.
Record daily precipitation for each month at Harrington
Month
Record daily precipitation (mm)
Date
Jan
21.3 mm (0.8 in)
7 January 1992
Feb
22.1 mm (0.9 in)
19 February 1971
Mar
45.2 mm (1.8 in)
14 March 1973
Apr
73.7 mm (2.9 in)
21 April 2005
May
78.0 mm (3.1 in)
17 May 1962
Jun
76.2 mm (3.0 in)
30 June 1988
Jul
57.2 mm (2.3 in)
2 July 1976
Aug
75.7 mm (3.0 in)
16 August 1993
Sep
51.1 mm (2.0 in)
9 September 2002
Oct
55.9 mm (2.2 in)
5 October 1995
Nov
31.0 mm (1.2 in)
12 November 1993
Dec
20.3 mm (0.8 in)
27 December 1987
Period of Record Coverage
1960 to 2007
Complete yearUnder 90 percent of days
48 years of record at Harrington, 1960 to 2007. 2 years have data for under 90 percent of days and are left out of rankings: 1960, 2007.
Cooler than the station meanWarmer than the station mean
One stripe for each of 46 complete years at Harrington, 1961 to 2006. Blue stripes are years cooler than the station's own mean of 8.3 C (46.9 F); red stripes are warmer. The coolest year was 1978, at 6.4 C (43.5 F), and the warmest was 1999, at 9.9 C (49.8 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Harrington as warming stripes, 1961 to 2006
Year
Annual mean temperature
Difference from the station mean
1961
8.0 C
-0.26 C
1962
8.0 C
-0.31 C
1963
9.0 C
+0.77 C
1964
7.9 C
-0.33 C
1965
7.7 C
-0.55 C
1966
7.5 C
-0.82 C
1967
7.8 C
-0.51 C
1968
7.6 C
-0.70 C
1969
7.8 C
-0.48 C
1970
7.9 C
-0.41 C
1971
7.7 C
-0.62 C
1972
7.3 C
-0.98 C
1973
8.7 C
+0.38 C
1974
9.0 C
+0.72 C
1975
7.7 C
-0.61 C
1976
8.7 C
+0.39 C
1977
8.4 C
+0.13 C
1978
6.4 C
-1.89 C
1979
6.9 C
-1.37 C
1980
8.9 C
+0.61 C
1981
9.1 C
+0.85 C
1982
7.0 C
-1.32 C
1983
7.8 C
-0.43 C
1984
8.1 C
-0.15 C
1985
7.0 C
-1.23 C
1986
8.5 C
+0.26 C
1987
9.4 C
+1.15 C
1988
8.5 C
+0.20 C
1989
8.0 C
-0.28 C
1990
9.1 C
+0.78 C
1991
9.1 C
+0.81 C
1992
8.5 C
+0.25 C
1993
6.7 C
-1.53 C
1994
8.3 C
+0.02 C
1995
8.3 C
+0.04 C
1996
6.5 C
-1.73 C
1997
8.0 C
-0.23 C
1998
9.2 C
+0.94 C
1999
9.9 C
+1.62 C
2000
8.7 C
+0.42 C
2001
9.2 C
+0.94 C
2002
9.0 C
+0.71 C
2003
9.0 C
+0.76 C
2004
9.4 C
+1.14 C
2005
9.6 C
+1.30 C
2006
9.7 C
+1.44 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1961 to 2006. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Harrington
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.5) per decade
0.5 F (0.2 to 0.8) per decade
1961 to 2006
46
Rise
Mean daily maximum
0.2 C (-0.1 to 0.4) per decade
0.3 F (-0.1 to 0.7) per decade
1961 to 2006
46
Not clearly different from zero
Mean daily minimum
0.4 C (0.2 to 0.6) per decade
0.8 F (0.4 to 1.1) per decade
1961 to 2006
46
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
1960 to 2007
Yearly extremes at Harrington: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
2003
39.4 C (102.9 F)
48
Coldest night (TNn)
-38.9 C (-38.0 F)
1983
-31.1 C (-24.0 F)
48
Wettest day (Rx1day)
78.0 mm (3.1 in)
1962
44.8 mm (1.8 in)
48
Wettest five days (Rx5day)
148.4 mm (5.8 in)
1968
67.7 mm (2.7 in)
48
Longest dry spell (CDD)
81 days
1964
31 days
48
Hottest day (TXx)
The hottest day of the year at Harrington, 1960 to 2007. The record is 43.3 C (109.9 F) in 2003, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Harrington by year
Year
Hottest day (TXx)
1960
31.7 C (89.1 F)
1961
40.6 C (105.1 F)
1962
41.1 C (106.0 F)
1963
38.9 C (102.0 F)
1964
42.8 C (109.0 F)
1965
42.2 C (108.0 F)
1966
42.8 C (109.0 F)
1967
37.8 C (100.0 F)
1968
38.9 C (102.0 F)
1969
38.9 C (102.0 F)
1970
40.0 C (104.0 F)
1971
38.9 C (102.0 F)
1972
36.1 C (97.0 F)
1973
41.7 C (107.1 F)
1974
40.6 C (105.1 F)
1975
39.4 C (102.9 F)
1976
39.4 C (102.9 F)
1977
40.6 C (105.1 F)
1978
38.3 C (100.9 F)
1979
40.0 C (104.0 F)
1980
42.2 C (108.0 F)
1981
39.4 C (102.9 F)
1982
38.9 C (102.0 F)
1983
40.6 C (105.1 F)
1984
37.8 C (100.0 F)
1985
41.1 C (106.0 F)
1986
38.3 C (100.9 F)
1987
39.4 C (102.9 F)
1988
41.1 C (106.0 F)
1989
41.1 C (106.0 F)
1990
42.8 C (109.0 F)
1991
38.3 C (100.9 F)
1992
35.6 C (96.1 F)
1993
35.0 C (95.0 F)
1994
37.2 C (99.0 F)
1995
38.9 C (102.0 F)
1996
37.2 C (99.0 F)
1997
38.9 C (102.0 F)
1998
39.4 C (102.9 F)
1999
37.2 C (99.0 F)
2000
37.8 C (100.0 F)
2001
39.4 C (102.9 F)
2002
41.7 C (107.1 F)
2003
43.3 C (109.9 F)
2004
39.4 C (102.9 F)
2005
39.4 C (102.9 F)
2006
43.3 C (109.9 F)
2007
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Harrington, 1960 to 2007. The record is -38.9 C (-38.0 F) in 1983, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Harrington by year
Year
Coldest night (TNn)
1960
-26.7 C (-16.1 F)
1961
-27.2 C (-17.0 F)
1962
-33.3 C (-27.9 F)
1963
-32.2 C (-26.0 F)
1964
-32.2 C (-26.0 F)
1965
-26.7 C (-16.1 F)
1966
-31.1 C (-24.0 F)
1967
-32.8 C (-27.0 F)
1968
-31.7 C (-25.1 F)
1969
-28.9 C (-20.0 F)
1970
-27.8 C (-18.0 F)
1971
-31.7 C (-25.1 F)
1972
-31.7 C (-25.1 F)
1973
-30.6 C (-23.1 F)
1974
-30.6 C (-23.1 F)
1975
-28.9 C (-20.0 F)
1976
-30.0 C (-22.0 F)
1977
-30.6 C (-23.1 F)
1978
-33.3 C (-27.9 F)
1979
-34.4 C (-29.9 F)
1980
-31.7 C (-25.1 F)
1981
-31.7 C (-25.1 F)
1982
-33.9 C (-29.0 F)
1983
-38.9 C (-38.0 F)
1984
-32.2 C (-26.0 F)
1985
-30.6 C (-23.1 F)
1986
-27.8 C (-18.0 F)
1987
-25.0 C (-13.0 F)
1988
-33.3 C (-27.9 F)
1989
-37.8 C (-36.0 F)
1990
-35.6 C (-32.1 F)
1991
-27.2 C (-17.0 F)
1992
-27.8 C (-18.0 F)
1993
-33.3 C (-27.9 F)
1994
-33.9 C (-29.0 F)
1995
-27.2 C (-17.0 F)
1996
-37.2 C (-35.0 F)
1997
-27.2 C (-17.0 F)
1998
-33.3 C (-27.9 F)
1999
-28.9 C (-20.0 F)
2000
-31.1 C (-24.0 F)
2001
-23.9 C (-11.0 F)
2002
-23.9 C (-11.0 F)
2003
-30.0 C (-22.0 F)
2004
-27.8 C (-18.0 F)
2005
-28.3 C (-18.9 F)
2006
-31.1 C (-24.0 F)
2007
-32.8 C (-27.0 F)
Wettest day (Rx1day)
The wettest day of the year at Harrington, 1960 to 2007. The record is 78.0 mm (3.1 in) in 1962, marked on the chart; the median year is 44.8 mm (1.8 in).
Wettest day (Rx1day) at Harrington by year
Year
Wettest day (Rx1day)
1960
10.4 mm (0.4 in)
1961
41.9 mm (1.6 in)
1962
78.0 mm (3.1 in)
1963
63.5 mm (2.5 in)
1964
45.2 mm (1.8 in)
1965
51.3 mm (2.0 in)
1966
59.2 mm (2.3 in)
1967
32.8 mm (1.3 in)
1968
54.6 mm (2.1 in)
1969
40.6 mm (1.6 in)
1970
33.0 mm (1.3 in)
1971
50.0 mm (2.0 in)
1972
45.0 mm (1.8 in)
1973
70.1 mm (2.8 in)
1974
48.5 mm (1.9 in)
1975
32.3 mm (1.3 in)
1976
57.2 mm (2.3 in)
1977
44.5 mm (1.8 in)
1978
64.8 mm (2.6 in)
1979
61.2 mm (2.4 in)
1980
35.1 mm (1.4 in)
1981
39.4 mm (1.6 in)
1982
64.8 mm (2.6 in)
1983
59.7 mm (2.4 in)
1984
42.9 mm (1.7 in)
1985
24.9 mm (1.0 in)
1986
54.9 mm (2.2 in)
1987
30.0 mm (1.2 in)
1988
76.2 mm (3.0 in)
1989
23.1 mm (0.9 in)
1990
37.8 mm (1.5 in)
1991
34.5 mm (1.4 in)
1992
24.9 mm (1.0 in)
1993
75.7 mm (3.0 in)
1994
45.5 mm (1.8 in)
1995
55.9 mm (2.2 in)
1996
39.6 mm (1.6 in)
1997
50.3 mm (2.0 in)
1998
40.4 mm (1.6 in)
1999
35.3 mm (1.4 in)
2000
47.0 mm (1.9 in)
2001
36.3 mm (1.4 in)
2002
51.1 mm (2.0 in)
2003
21.6 mm (0.9 in)
2004
34.3 mm (1.4 in)
2005
73.7 mm (2.9 in)
2006
40.9 mm (1.6 in)
2007
24.9 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Harrington, 1960 to 2007. The record is 148.4 mm (5.8 in) in 1968, marked on the chart; the median year is 67.7 mm (2.7 in).
Wettest five days (Rx5day) at Harrington by year
Year
Wettest five days (Rx5day)
1960
10.4 mm (0.4 in)
1961
70.1 mm (2.8 in)
1962
122.9 mm (4.8 in)
1963
63.8 mm (2.5 in)
1964
79.7 mm (3.1 in)
1965
56.1 mm (2.2 in)
1966
73.7 mm (2.9 in)
1967
83.9 mm (3.3 in)
1968
148.4 mm (5.8 in)
1969
46.2 mm (1.8 in)
1970
33.0 mm (1.3 in)
1971
93.1 mm (3.7 in)
1972
63.8 mm (2.5 in)
1973
93.7 mm (3.7 in)
1974
55.0 mm (2.2 in)
1975
56.0 mm (2.2 in)
1976
65.6 mm (2.6 in)
1977
66.0 mm (2.6 in)
1978
91.7 mm (3.6 in)
1979
86.4 mm (3.4 in)
1980
44.5 mm (1.8 in)
1981
51.6 mm (2.0 in)
1982
105.9 mm (4.2 in)
1983
95.5 mm (3.8 in)
1984
54.3 mm (2.1 in)
1985
58.2 mm (2.3 in)
1986
114.8 mm (4.5 in)
1987
48.2 mm (1.9 in)
1988
78.7 mm (3.1 in)
1989
39.1 mm (1.5 in)
1990
61.9 mm (2.4 in)
1991
84.7 mm (3.3 in)
1992
47.5 mm (1.9 in)
1993
84.4 mm (3.3 in)
1994
61.8 mm (2.4 in)
1995
84.1 mm (3.3 in)
1996
97.7 mm (3.8 in)
1997
74.9 mm (2.9 in)
1998
77.0 mm (3.0 in)
1999
70.7 mm (2.8 in)
2000
47.5 mm (1.9 in)
2001
73.6 mm (2.9 in)
2002
69.4 mm (2.7 in)
2003
57.6 mm (2.3 in)
2004
48.5 mm (1.9 in)
2005
111.0 mm (4.4 in)
2006
51.8 mm (2.0 in)
2007
40.9 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Harrington, 1960 to 2007. The record is 81 days in 1964, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Harrington by year
Year
Longest dry spell (CDD)
1960
23 days
1961
36 days
1962
68 days
1963
30 days
1964
81 days
1965
23 days
1966
21 days
1967
55 days
1968
23 days
1969
22 days
1970
42 days
1971
23 days
1972
39 days
1973
27 days
1974
25 days
1975
66 days
1976
49 days
1977
26 days
1978
26 days
1979
55 days
1980
28 days
1981
44 days
1982
25 days
1983
32 days
1984
29 days
1985
27 days
1986
31 days
1987
31 days
1988
40 days
1989
32 days
1990
38 days
1991
32 days
1992
32 days
1993
27 days
1994
31 days
1995
16 days
1996
21 days
1997
41 days
1998
38 days
1999
34 days
2000
18 days
2001
24 days
2002
27 days
2003
22 days
2004
26 days
2005
37 days
2006
34 days
2007
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
46 years with a frost
Across 46 years with a frost, the median last spring frost at Harrington falls on 17 May and the median first autumn frost on 20 September, which leaves a median of 130 days between them.
Fitted over all years, the growing season changes by +4.0 days per decade at this station.
Frost dates and growing season at Harrington
Measure
Median, all years
Earliest period
Recent period (1977 to 2006)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
15 May
n/a
-2.0 days per decade
First autumn frost
20 September
n/a
23 September
n/a
+2.1 days per decade
Growing days
130 days
n/a
134 days
n/a
+4.0 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
46 years, 1961 to 2006
A day with at least 45.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 88.7 mm (3.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Harrington: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
45.6 mm (1.8 in)
5 years
59.4 mm (2.3 in)
10 years
67.5 mm (2.7 in)
25 years
76.8 mm (3.0 in)
50 years
83.0 mm (3.3 in)
Longer than the 46 years of record
100 years
88.7 mm (3.5 in)
Longer than the 46 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, 46 years of values from 1961 to 2006.
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: 78.0 mm (3.1 in) in 1962; 76.2 mm (3.0 in) in 1988; 75.7 mm (3.0 in) in 1993.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Harrington standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Harrington 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.