Record envelope, standing records and threshold days for Keene 3S (USC00324571), North Dakota, United States, with 77 years of record.
Key Facts for Keene 3S
Keene 3S (USC00324571) is a weather station in North Dakota, United States at 47.90 latitude and -102.92 longitude, 753 m (2,470 ft) above sea level.
The station reports from 1950 to 2026, 77 years of record.
1,464 records set at Keene 3S still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Keene 3S set a daily record low minimum temperature of 4.4 C (39.9 F) on 7 August 2026.
About the Station
Location: North Dakota, United States, 47.90 latitude, -102.92 longitude.
Elevation: 753 m (2,470 ft).
Period of record: 1950 to 2026, 77 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
17 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 Keene 3S. The lines show the 2026 daily maximum and minimum. 17 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Keene 3S, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.3 C (55.9 F)
-40.6 C (-41.1 F)
7.8 C (46.0 F)
-36.1 C (-33.0 F)
Feb
18.3 C (64.9 F)
-38.9 C (-38.0 F)
12.2 C (54.0 F)
-27.8 C (-18.0 F)
Mar
26.7 C (80.1 F)
-32.8 C (-27.0 F)
23.3 C (73.9 F)
-18.3 C (-0.9 F)
Apr
35.6 C (96.1 F)
-25.6 C (-14.1 F)
29.4 C (84.9 F)
-11.7 C (10.9 F)
May
38.3 C (100.9 F)
-11.7 C (10.9 F)
33.9 C (93.0 F)
-10.6 C (12.9 F)
Jun
40.6 C (105.1 F)
-5.6 C (21.9 F)
32.8 C (91.0 F)
2.8 C (37.0 F)
Jul
42.2 C (108.0 F)
-2.8 C (27.0 F)
40.0 C (104.0 F)
8.9 C (48.0 F)
Aug
40.0 C (104.0 F)
-1.1 C (30.0 F)
38.3 C (100.9 F)
4.4 C (39.9 F)
Sep
38.9 C (102.0 F)
-10.6 C (12.9 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-21.7 C (-7.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Keene 3S still stand. 1988 holds the most, with 52.
Standing records at Keene 3S by the year they were set
Year set
Standing records
1959
12
1960
19
1961
15
1962
16
1963
17
1964
5
1965
3
1966
24
1967
23
1968
42
1969
35
1970
7
1971
2
1972
34
1973
16
1974
27
1975
18
1976
12
1977
25
1978
13
1979
23
1980
28
1981
26
1982
19
1983
18
1984
23
1985
34
1986
30
1987
30
1988
52
1989
34
1990
23
1991
34
1992
42
1993
20
1994
16
1995
13
1996
24
1997
25
1998
21
1999
21
2000
25
2001
20
2002
24
2003
26
2004
19
2005
23
2006
18
2007
19
2008
10
2009
25
2010
6
2011
9
2012
38
2013
10
2014
23
2015
14
2016
14
2017
21
2018
21
2019
18
2020
29
2021
27
2022
16
2023
21
2024
18
2025
26
2026
23
All-Time Record Progression
4 new records
4 all-time records were set at Keene 3S between 18 July 1987 and 9 July 2019. Each dot is a new record.
When Keene 3S set new all-time records
Date
Kind
Detail
1987-07-18
Record daily precipitation
Record daily precipitation 78.7 mm (3.1 in)
1997-03-01
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
2007-07-24
Record high maximum temperature
Record high maximum temperature 42.2 C (108.0 F)
2019-07-09
Record daily precipitation
Record daily precipitation 118.1 mm (4.6 in)
Wettest Day of Each Month
Jul: 118.1 mm (4.6 in)
The wettest day on record for each calendar month at Keene 3S. The most was 118.1 mm (4.6 in) on 9 July 2019.
Record daily precipitation for each month at Keene 3S
Month
Record daily precipitation (mm)
Date
Jan
15.2 mm (0.6 in)
6 January 2010
Feb
31.8 mm (1.3 in)
25 February 1998
Mar
45.7 mm (1.8 in)
31 March 2016
Apr
48.3 mm (1.9 in)
28 April 1975
May
70.9 mm (2.8 in)
13 May 2022
Jun
66.0 mm (2.6 in)
9 June 1975
Jul
118.1 mm (4.6 in)
9 July 2019
Aug
56.1 mm (2.2 in)
24 August 1968
Sep
50.8 mm (2.0 in)
10 September 2010
Oct
51.3 mm (2.0 in)
6 October 1994
Nov
58.4 mm (2.3 in)
1 November 2000
Dec
21.3 mm (0.8 in)
8 December 2023
Period of Record Coverage
1959 to 2026
Complete yearUnder 90 percent of days
68 years of record at Keene 3S, 1959 to 2026. 12 years have data for under 90 percent of days and are left out of rankings: 1959, 1962, 1963, 1964, 1965, 1966, 1969, 1970 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Keene 3S, 1960 to 2025. Blue stripes are years cooler than the station's own mean of 5.8 C (42.4 F); red stripes are warmer. The coolest year was 1968, at 3.2 C (37.8 F), and the warmest was 1987, at 8.5 C (47.2 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Keene 3S as warming stripes, 1960 to 2025
Year
Annual mean temperature
Difference from the station mean
1960
4.7 C
-1.03 C
1961
5.4 C
-0.31 C
1966
3.5 C
-2.23 C
1967
3.9 C
-1.87 C
1968
3.2 C
-2.54 C
1973
6.1 C
+0.30 C
1974
5.5 C
-0.26 C
1975
4.4 C
-1.40 C
1976
6.0 C
+0.21 C
1977
5.6 C
-0.13 C
1978
3.8 C
-1.91 C
1979
4.1 C
-1.66 C
1980
5.6 C
-0.20 C
1981
6.9 C
+1.18 C
1984
5.6 C
-0.20 C
1985
4.3 C
-1.50 C
1986
6.3 C
+0.58 C
1987
8.5 C
+2.70 C
1988
7.2 C
+1.46 C
1989
5.4 C
-0.34 C
1990
7.0 C
+1.26 C
1991
7.0 C
+1.26 C
1992
6.4 C
+0.64 C
1993
4.6 C
-1.19 C
1994
5.5 C
-0.23 C
1995
5.2 C
-0.55 C
1996
3.6 C
-2.19 C
1997
5.9 C
+0.14 C
1998
6.9 C
+1.19 C
1999
7.0 C
+1.24 C
2000
5.8 C
+0.05 C
2001
6.5 C
+0.70 C
2002
5.5 C
-0.25 C
2003
5.5 C
-0.22 C
2004
5.6 C
-0.12 C
2005
6.6 C
+0.85 C
2006
7.4 C
+1.63 C
2007
6.6 C
+0.83 C
2008
5.5 C
-0.29 C
2009
4.3 C
-1.43 C
2010
5.1 C
-0.70 C
2011
5.3 C
-0.41 C
2012
7.6 C
+1.84 C
2013
4.9 C
-0.88 C
2014
4.9 C
-0.87 C
2015
7.3 C
+1.57 C
2016
7.6 C
+1.85 C
2017
6.4 C
+0.61 C
2019
4.2 C
-1.54 C
2020
6.4 C
+0.63 C
2021
7.3 C
+1.58 C
2022
5.2 C
-0.57 C
2023
6.7 C
+0.95 C
2024
7.1 C
+1.38 C
2025
6.4 C
+0.64 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1960 to 2025. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Keene 3S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.4) per decade
0.5 F (0.2 to 0.8) per decade
1960 to 2025
55
Rise
Mean daily maximum
0.19 C (-0.02 to 0.40) per decade
0.34 F (-0.04 to 0.71) per decade
1960 to 2025
55
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.9) per decade
1960 to 2025
55
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
1950 to 2026
Yearly extremes at Keene 3S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
2007
37.2 C (99.0 F)
68
Coldest night (TNn)
-41.7 C (-43.1 F)
1983
-34.1 C (-29.5 F)
68
Wettest day (Rx1day)
118.1 mm (4.6 in)
2019
37.6 mm (1.5 in)
77
Wettest five days (Rx5day)
154.9 mm (6.1 in)
2019
54.3 mm (2.1 in)
76
Longest dry spell (CDD)
62 days
2026
32 days
77
Hottest day (TXx)
The hottest day of the year at Keene 3S, 1950 to 2026. The record is 42.2 C (108.0 F) in 2007, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Keene 3S by year
Year
Hottest day (TXx)
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
37.2 C (99.0 F)
1960
41.7 C (107.1 F)
1961
37.2 C (99.0 F)
1962
35.0 C (95.0 F)
1963
36.7 C (98.1 F)
1964
36.1 C (97.0 F)
1965
25.6 C (78.1 F)
1966
39.4 C (102.9 F)
1967
36.7 C (98.1 F)
1968
36.1 C (97.0 F)
1969
37.8 C (100.0 F)
1970
4.4 C (39.9 F)
1971
29.4 C (84.9 F)
1972
37.2 C (99.0 F)
1973
37.8 C (100.0 F)
1974
38.9 C (102.0 F)
1975
38.9 C (102.0 F)
1976
38.9 C (102.0 F)
1977
36.1 C (97.0 F)
1978
38.9 C (102.0 F)
1979
39.4 C (102.9 F)
1980
40.0 C (104.0 F)
1981
40.6 C (105.1 F)
1982
36.1 C (97.0 F)
1983
35.6 C (96.1 F)
1984
40.6 C (105.1 F)
1985
40.0 C (104.0 F)
1986
35.0 C (95.0 F)
1987
37.8 C (100.0 F)
1988
41.1 C (106.0 F)
1989
40.6 C (105.1 F)
1990
36.1 C (97.0 F)
1991
38.3 C (100.9 F)
1992
36.7 C (98.1 F)
1993
32.8 C (91.0 F)
1994
36.7 C (98.1 F)
1995
36.1 C (97.0 F)
1996
37.2 C (99.0 F)
1997
37.8 C (100.0 F)
1998
38.3 C (100.9 F)
1999
37.8 C (100.0 F)
2000
36.7 C (98.1 F)
2001
35.6 C (96.1 F)
2002
35.6 C (96.1 F)
2003
37.8 C (100.0 F)
2004
37.8 C (100.0 F)
2005
36.1 C (97.0 F)
2006
37.8 C (100.0 F)
2007
42.2 C (108.0 F)
2008
36.7 C (98.1 F)
2009
35.6 C (96.1 F)
2010
33.9 C (93.0 F)
2011
35.0 C (95.0 F)
2012
38.3 C (100.9 F)
2013
34.4 C (93.9 F)
2014
35.0 C (95.0 F)
2015
39.4 C (102.9 F)
2016
36.1 C (97.0 F)
2017
37.8 C (100.0 F)
2018
40.0 C (104.0 F)
2019
34.4 C (93.9 F)
2020
36.7 C (98.1 F)
2021
37.8 C (100.0 F)
2022
36.1 C (97.0 F)
2023
36.1 C (97.0 F)
2024
39.4 C (102.9 F)
2025
38.9 C (102.0 F)
2026
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Keene 3S, 1950 to 2026. The record is -41.7 C (-43.1 F) in 1983, marked on the chart; the median year is -34.1 C (-29.5 F).
Coldest night (TNn) at Keene 3S by year
Year
Coldest night (TNn)
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
-27.2 C (-17.0 F)
1960
-31.1 C (-24.0 F)
1961
-35.0 C (-31.0 F)
1962
-38.3 C (-36.9 F)
1963
-32.8 C (-27.0 F)
1964
-29.4 C (-20.9 F)
1965
-28.9 C (-20.0 F)
1966
-36.7 C (-34.1 F)
1967
-35.6 C (-32.1 F)
1968
-40.0 C (-40.0 F)
1969
-39.4 C (-38.9 F)
1970
-40.0 C (-40.0 F)
1971
-28.9 C (-20.0 F)
1972
-37.2 C (-35.0 F)
1973
-32.8 C (-27.0 F)
1974
-36.1 C (-33.0 F)
1975
-32.8 C (-27.0 F)
1976
-33.9 C (-29.0 F)
1977
-38.9 C (-38.0 F)
1978
-36.1 C (-33.0 F)
1979
-33.3 C (-27.9 F)
1980
-36.7 C (-34.1 F)
1981
-32.8 C (-27.0 F)
1982
-40.6 C (-41.1 F)
1983
-41.7 C (-43.1 F)
1984
-34.4 C (-29.9 F)
1985
-36.7 C (-34.1 F)
1986
-36.7 C (-34.1 F)
1987
-26.7 C (-16.1 F)
1988
-33.3 C (-27.9 F)
1989
-38.3 C (-36.9 F)
1990
-36.1 C (-33.0 F)
1991
-32.2 C (-26.0 F)
1992
-34.4 C (-29.9 F)
1993
-32.8 C (-27.0 F)
1994
-34.4 C (-29.9 F)
1995
-28.3 C (-18.9 F)
1996
-37.8 C (-36.0 F)
1997
-35.6 C (-32.1 F)
1998
-32.8 C (-27.0 F)
1999
-31.1 C (-24.0 F)
2000
-31.1 C (-24.0 F)
2001
-28.9 C (-20.0 F)
2002
-30.0 C (-22.0 F)
2003
-33.3 C (-27.9 F)
2004
-35.6 C (-32.1 F)
2005
-37.8 C (-36.0 F)
2006
-32.2 C (-26.0 F)
2007
-31.1 C (-24.0 F)
2008
-33.9 C (-29.0 F)
2009
-37.8 C (-36.0 F)
2010
-35.0 C (-31.0 F)
2011
-33.9 C (-29.0 F)
2012
-28.9 C (-20.0 F)
2013
-33.3 C (-27.9 F)
2014
-32.2 C (-26.0 F)
2015
-32.8 C (-27.0 F)
2016
-33.3 C (-27.9 F)
2017
-35.0 C (-31.0 F)
2018
-34.4 C (-29.9 F)
2019
-38.9 C (-38.0 F)
2020
-31.1 C (-24.0 F)
2021
-38.3 C (-36.9 F)
2022
-33.3 C (-27.9 F)
2023
-30.6 C (-23.1 F)
2024
-37.8 C (-36.0 F)
2025
-38.3 C (-36.9 F)
2026
-36.1 C (-33.0 F)
Wettest day (Rx1day)
The wettest day of the year at Keene 3S, 1950 to 2026. The record is 118.1 mm (4.6 in) in 2019, marked on the chart; the median year is 37.6 mm (1.5 in).
Wettest day (Rx1day) at Keene 3S by year
Year
Wettest day (Rx1day)
1950
28.2 mm (1.1 in)
1951
25.4 mm (1.0 in)
1952
26.2 mm (1.0 in)
1953
27.4 mm (1.1 in)
1954
37.3 mm (1.5 in)
1955
35.1 mm (1.4 in)
1956
34.8 mm (1.4 in)
1957
32.5 mm (1.3 in)
1958
27.9 mm (1.1 in)
1959
47.2 mm (1.9 in)
1960
32.5 mm (1.3 in)
1961
29.7 mm (1.2 in)
1962
46.0 mm (1.8 in)
1963
36.1 mm (1.4 in)
1964
49.5 mm (1.9 in)
1965
3.3 mm (0.13 in)
1966
36.8 mm (1.4 in)
1967
29.2 mm (1.1 in)
1968
56.1 mm (2.2 in)
1969
35.6 mm (1.4 in)
1970
3.8 mm (0.15 in)
1971
22.4 mm (0.9 in)
1972
40.4 mm (1.6 in)
1973
50.8 mm (2.0 in)
1974
38.1 mm (1.5 in)
1975
66.0 mm (2.6 in)
1976
32.0 mm (1.3 in)
1977
40.1 mm (1.6 in)
1978
44.5 mm (1.8 in)
1979
15.2 mm (0.6 in)
1980
32.3 mm (1.3 in)
1981
70.1 mm (2.8 in)
1982
43.7 mm (1.7 in)
1983
30.0 mm (1.2 in)
1984
41.9 mm (1.6 in)
1985
36.8 mm (1.4 in)
1986
44.2 mm (1.7 in)
1987
78.7 mm (3.1 in)
1988
34.3 mm (1.4 in)
1989
49.0 mm (1.9 in)
1990
46.2 mm (1.8 in)
1991
38.6 mm (1.5 in)
1992
38.6 mm (1.5 in)
1993
61.0 mm (2.4 in)
1994
65.3 mm (2.6 in)
1995
29.2 mm (1.1 in)
1996
31.0 mm (1.2 in)
1997
67.3 mm (2.6 in)
1998
35.3 mm (1.4 in)
1999
33.5 mm (1.3 in)
2000
58.4 mm (2.3 in)
2001
37.6 mm (1.5 in)
2002
47.2 mm (1.9 in)
2003
22.9 mm (0.9 in)
2004
40.9 mm (1.6 in)
2005
45.7 mm (1.8 in)
2006
27.2 mm (1.1 in)
2007
29.2 mm (1.1 in)
2008
24.4 mm (1.0 in)
2009
35.6 mm (1.4 in)
2010
50.8 mm (2.0 in)
2011
46.5 mm (1.8 in)
2012
64.8 mm (2.6 in)
2013
65.0 mm (2.6 in)
2014
20.6 mm (0.8 in)
2015
28.7 mm (1.1 in)
2016
45.7 mm (1.8 in)
2017
38.9 mm (1.5 in)
2018
43.7 mm (1.7 in)
2019
118.1 mm (4.6 in)
2020
32.3 mm (1.3 in)
2021
50.8 mm (2.0 in)
2022
70.9 mm (2.8 in)
2023
23.4 mm (0.9 in)
2024
59.2 mm (2.3 in)
2025
50.3 mm (2.0 in)
2026
25.7 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Keene 3S, 1950 to 2026. The record is 154.9 mm (6.1 in) in 2019, marked on the chart; the median year is 54.3 mm (2.1 in).
Wettest five days (Rx5day) at Keene 3S by year
Year
Wettest five days (Rx5day)
1950
49.7 mm (2.0 in)
1951
30.7 mm (1.2 in)
1952
43.5 mm (1.7 in)
1953
50.1 mm (2.0 in)
1954
50.5 mm (2.0 in)
1955
51.9 mm (2.0 in)
1956
47.5 mm (1.9 in)
1957
57.4 mm (2.3 in)
1958
53.3 mm (2.1 in)
1959
96.4 mm (3.8 in)
1960
45.3 mm (1.8 in)
1961
43.5 mm (1.7 in)
1962
87.6 mm (3.4 in)
1963
85.4 mm (3.4 in)
1964
72.4 mm (2.9 in)
1965
3.3 mm (0.13 in)
1966
53.4 mm (2.1 in)
1967
35.8 mm (1.4 in)
1968
68.1 mm (2.7 in)
1969
111.8 mm (4.4 in)
1970
5.3 mm (0.21 in)
1971
32.3 mm (1.3 in)
1972
48.8 mm (1.9 in)
1973
96.6 mm (3.8 in)
1974
59.2 mm (2.3 in)
1975
91.0 mm (3.6 in)
1976
37.5 mm (1.5 in)
1977
61.4 mm (2.4 in)
1978
63.2 mm (2.5 in)
1979
21.8 mm (0.9 in)
1980
42.7 mm (1.7 in)
1981
92.7 mm (3.6 in)
1982
53.9 mm (2.1 in)
1983
45.7 mm (1.8 in)
1984
52.8 mm (2.1 in)
1985
43.6 mm (1.7 in)
1986
72.9 mm (2.9 in)
1987
98.3 mm (3.9 in)
1988
39.9 mm (1.6 in)
1989
49.0 mm (1.9 in)
1990
65.2 mm (2.6 in)
1991
56.9 mm (2.2 in)
1992
51.4 mm (2.0 in)
1993
71.9 mm (2.8 in)
1994
121.4 mm (4.8 in)
1995
49.5 mm (1.9 in)
1996
43.4 mm (1.7 in)
1997
80.9 mm (3.2 in)
1998
70.7 mm (2.8 in)
1999
64.8 mm (2.6 in)
2000
100.6 mm (4.0 in)
2001
50.8 mm (2.0 in)
2002
56.6 mm (2.2 in)
2003
54.7 mm (2.2 in)
2004
47.5 mm (1.9 in)
2005
72.2 mm (2.8 in)
2006
52.6 mm (2.1 in)
2007
41.4 mm (1.6 in)
2008
51.5 mm (2.0 in)
2009
69.6 mm (2.7 in)
2010
86.6 mm (3.4 in)
2011
n/a
2012
78.7 mm (3.1 in)
2013
100.9 mm (4.0 in)
2014
45.4 mm (1.8 in)
2015
43.9 mm (1.7 in)
2016
73.4 mm (2.9 in)
2017
57.7 mm (2.3 in)
2018
59.8 mm (2.4 in)
2019
154.9 mm (6.1 in)
2020
51.6 mm (2.0 in)
2021
75.2 mm (3.0 in)
2022
113.2 mm (4.5 in)
2023
44.2 mm (1.7 in)
2024
59.2 mm (2.3 in)
2025
92.7 mm (3.6 in)
2026
47.8 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Keene 3S, 1950 to 2026. The record is 62 days in 2026, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Keene 3S by year
Year
Longest dry spell (CDD)
1950
19 days
1951
33 days
1952
24 days
1953
48 days
1954
32 days
1955
34 days
1956
35 days
1957
26 days
1958
31 days
1959
30 days
1960
55 days
1961
38 days
1962
26 days
1963
32 days
1964
27 days
1965
40 days
1966
60 days
1967
35 days
1968
26 days
1969
50 days
1970
11 days
1971
24 days
1972
19 days
1973
42 days
1974
37 days
1975
43 days
1976
41 days
1977
24 days
1978
54 days
1979
49 days
1980
52 days
1981
56 days
1982
21 days
1983
24 days
1984
28 days
1985
38 days
1986
43 days
1987
46 days
1988
26 days
1989
30 days
1990
41 days
1991
26 days
1992
28 days
1993
31 days
1994
21 days
1995
23 days
1996
20 days
1997
39 days
1998
32 days
1999
33 days
2000
29 days
2001
50 days
2002
18 days
2003
20 days
2004
27 days
2005
46 days
2006
28 days
2007
29 days
2008
25 days
2009
39 days
2010
32 days
2011
2 days
2012
57 days
2013
26 days
2014
38 days
2015
28 days
2016
30 days
2017
28 days
2018
23 days
2019
49 days
2020
42 days
2021
31 days
2022
40 days
2023
25 days
2024
33 days
2025
33 days
2026
62 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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Keene 3S falls on 19 May and the median first autumn frost on 16 September, which leaves a median of 121 days between them.
Fitted over all years, the growing season changes by +5.5 days per decade at this station.
Frost dates and growing season at Keene 3S
Measure
Median, all years
Earliest period
Recent period (1995 to 2025)
Recent against earliest
Fitted trend
Last spring frost
19 May
n/a
20 May
n/a
+0.1 days per decade
First autumn frost
16 September
n/a
21 September
n/a
+5.6 days per decade
Growing days
121 days
n/a
122 days
n/a
+5.5 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
66 years, 1953 to 2025
A day with at least 39.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 100.3 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Keene 3S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.6 mm (1.6 in)
5 years
53.7 mm (2.1 in)
10 years
63.8 mm (2.5 in)
25 years
77.6 mm (3.1 in)
50 years
88.7 mm (3.5 in)
100 years
100.3 mm (3.9 in)
Longer than the 66 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, 66 years of values from 1953 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: 118.1 mm (4.6 in) in 2019; 78.7 mm (3.1 in) in 1987; 70.9 mm (2.8 in) in 2022.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Keene 3S, at 1973 and 1992. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1973 ran 0.7 C (1.3 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1992 ran 0.2 C (0.3 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Keene 3S, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1973
+0.7
+1.3
likely
5
1992
-0.2
-0.3
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.
Climate Twins
2010 to 2025 against 1961 to 1990
Over 2010 to 2025, Keene 3S had a mean temperature of 6.2 C (43.1 F) and 465.0 mm (18.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Pretty Rock (United States, 208 km away), Lemmon (United States, 225 km away) and Richardton Abbey (United States, 121 km away).
Climate twins of Keene 3S: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Keene 3S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Keene 3S 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.