Record envelope, standing records and threshold days for Belcourt Keya Radio (USC00320626), North Dakota, United States, with 82 years of record.
Key Facts for Belcourt Keya Radio
Belcourt Keya Radio (USC00320626) is a weather station in North Dakota, United States at 48.84 latitude and -99.75 longitude, 597 m (1,960 ft) above sea level.
The station reports from 1945 to 2026, 82 years of record.
1,464 records set at Belcourt Keya Radio still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Belcourt Keya Radio set a daily record high maximum temperature of 34.4 C (93.9 F) on 14 July 2026.
About the Station
Location: North Dakota, United States, 48.84 latitude, -99.75 longitude.
Elevation: 597 m (1,960 ft).
Period of record: 1945 to 2026, 82 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
4 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 Belcourt Keya Radio. The lines show the 2026 daily maximum and minimum. 4 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Belcourt Keya Radio, 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)
-42.2 C (-44.0 F)
5.6 C (42.1 F)
-35.6 C (-32.1 F)
Feb
15.6 C (60.1 F)
-45.6 C (-50.1 F)
9.4 C (48.9 F)
-24.4 C (-11.9 F)
Mar
23.3 C (73.9 F)
-41.7 C (-43.1 F)
15.6 C (60.1 F)
-30.6 C (-23.1 F)
Apr
35.0 C (95.0 F)
-30.0 C (-22.0 F)
22.8 C (73.0 F)
-15.0 C (5.0 F)
May
35.0 C (95.0 F)
-16.1 C (3.0 F)
32.8 C (91.0 F)
-5.6 C (21.9 F)
Jun
40.6 C (105.1 F)
-7.8 C (18.0 F)
32.8 C (91.0 F)
3.9 C (39.0 F)
Jul
38.3 C (100.9 F)
0.0 C (32.0 F)
34.4 C (93.9 F)
11.7 C (53.1 F)
Aug
38.3 C (100.9 F)
-2.8 C (27.0 F)
28.3 C (82.9 F)
10.0 C (50.0 F)
Sep
36.1 C (97.0 F)
-11.1 C (12.0 F)
19.4 C (66.9 F)
4.4 C (39.9 F)
Oct
32.2 C (90.0 F)
-23.9 C (-11.0 F)
18.9 C (66.0 F)
-0.6 C (30.9 F)
Nov
21.7 C (71.1 F)
-38.3 C (-36.9 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Belcourt Keya Radio still stand. 1992 holds the most, with 40.
Standing records at Belcourt Keya Radio by the year they were set
Year set
Standing records
1945
12
1946
30
1947
21
1948
26
1949
20
1950
36
1951
20
1952
27
1953
18
1954
18
1955
23
1956
17
1957
15
1958
30
1959
23
1960
12
1961
16
1962
29
1963
23
1964
30
1965
17
1966
25
1967
16
1968
19
1969
18
1970
9
1971
3
1972
27
1973
5
1974
13
1975
19
1976
11
1977
21
1978
1
1979
24
1980
19
1981
26
1982
13
1983
26
1984
23
1985
32
1986
22
1988
20
1989
34
1990
16
1991
30
1992
40
1993
18
1994
21
1995
25
1996
17
1997
9
1998
10
1999
8
2000
22
2001
12
2002
15
2003
18
2004
12
2005
11
2006
12
2007
12
2008
7
2009
13
2010
11
2011
13
2012
20
2013
7
2014
11
2015
22
2016
12
2017
10
2018
16
2019
4
2020
17
2021
27
2022
14
2023
16
2024
20
2025
15
2026
12
All-Time Record Progression
10 new records
10 all-time records were set at Belcourt Keya Radio between 16 January 1982 and 5 June 2021. Each dot is a new record.
When Belcourt Keya Radio set new all-time records
Date
Kind
Detail
1982-01-16
Record low maximum temperature
Record low maximum temperature -31.7 C (-25.1 F)
1995-03-23
Record daily snowfall
Record daily snowfall 27.9 cm (11.0 in)
1995-06-19
Record high minimum temperature
Record high minimum temperature 24.4 C (75.9 F)
1996-02-02
Record low minimum temperature
Record low minimum temperature -43.3 C (-45.9 F)
1996-02-03
Record low minimum temperature
Record low minimum temperature -45.6 C (-50.1 F)
1996-11-21
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
1999-05-04
Record daily precipitation
Record daily precipitation 152.4 mm (6.0 in)
2016-12-07
Record daily snowfall
Record daily snowfall 35.6 cm (14.0 in)
2019-10-12
Record daily snowfall
Record daily snowfall 50.8 cm (20.0 in)
2021-06-05
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
Wettest Day of Each Month
May: 152.4 mm (6.0 in)
The wettest day on record for each calendar month at Belcourt Keya Radio. The most was 152.4 mm (6.0 in) on 4 May 1999.
Record daily precipitation for each month at Belcourt Keya Radio
Month
Record daily precipitation (mm)
Date
Jan
63.5 mm (2.5 in)
27 January 2003
Feb
38.1 mm (1.5 in)
11 February 2003
Mar
63.5 mm (2.5 in)
15 March 2007
Apr
101.6 mm (4.0 in)
4 April 2003
May
152.4 mm (6.0 in)
4 May 1999
Jun
88.9 mm (3.5 in)
9 June 2002
Jul
109.2 mm (4.3 in)
21 July 1965
Aug
88.4 mm (3.5 in)
24 August 1968
Sep
101.6 mm (4.0 in)
24 September 2015
Oct
76.2 mm (3.0 in)
15 October 2009
Nov
50.8 mm (2.0 in)
28 November 2010
Dec
50.8 mm (2.0 in)
4 December 2010
Period of Record Coverage
1945 to 2026
Complete yearUnder 90 percent of days
81 years of record at Belcourt Keya Radio, 1945 to 2026. 29 years have data for under 90 percent of days and are left out of rankings: 1945, 1970, 1973, 1977, 1978, 1979, 1980, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 50 complete years at Belcourt Keya Radio, 1946 to 2025. Blue stripes are years cooler than the station's own mean of 2.6 C (36.7 F); red stripes are warmer. The coolest year was 1950, at -0.5 C (31.2 F), and the warmest was 2024, at 5.0 C (40.9 F). The strongest colour marks a difference of 3.1 C (5.6 F).
Annual mean temperature at Belcourt Keya Radio as warming stripes, 1946 to 2025
Year
Annual mean temperature
Difference from the station mean
1946
2.1 C
-0.51 C
1947
2.0 C
-0.61 C
1948
1.9 C
-0.75 C
1949
1.9 C
-0.76 C
1950
-0.5 C
-3.10 C
1951
0.4 C
-2.25 C
1952
3.1 C
+0.50 C
1953
3.8 C
+1.13 C
1954
2.9 C
+0.25 C
1955
1.5 C
-1.10 C
1956
2.1 C
-0.49 C
1957
2.8 C
+0.14 C
1958
3.1 C
+0.50 C
1959
2.4 C
-0.28 C
1960
2.4 C
-0.19 C
1961
3.0 C
+0.40 C
1962
2.2 C
-0.46 C
1963
3.6 C
+0.99 C
1964
2.2 C
-0.40 C
1965
1.4 C
-1.24 C
1966
1.7 C
-0.91 C
1967
2.3 C
-0.34 C
1968
2.2 C
-0.41 C
1969
2.0 C
-0.60 C
1971
2.0 C
-0.67 C
1972
1.4 C
-1.25 C
1974
2.1 C
-0.58 C
1975
2.9 C
+0.31 C
1976
3.3 C
+0.65 C
1981
4.6 C
+1.98 C
1983
2.3 C
-0.37 C
1984
2.7 C
+0.04 C
1985
0.8 C
-1.82 C
1986
2.6 C
-0.04 C
1994
1.7 C
-0.98 C
2001
3.8 C
+1.17 C
2003
3.0 C
+0.38 C
2004
2.3 C
-0.37 C
2007
2.3 C
-0.32 C
2012
4.5 C
+1.90 C
2014
1.3 C
-1.29 C
2015
3.8 C
+1.16 C
2016
4.4 C
+1.81 C
2019
2.1 C
-0.53 C
2020
4.2 C
+1.59 C
2021
4.5 C
+1.91 C
2022
2.6 C
+0.00 C
2023
4.7 C
+2.11 C
2024
5.0 C
+2.34 C
2025
3.9 C
+1.23 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1946 to 2025. In Fahrenheit: 0.4 F (0.2 to 0.6) per decade. The slope is a straight line fitted to 50 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Belcourt Keya Radio
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.6) per decade
1946 to 2025
50
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1946 to 2025
50
Rise
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1946 to 2025
50
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
1945 to 2026
Yearly extremes at Belcourt Keya Radio: 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)
2021
34.4 C (93.9 F)
81
Coldest night (TNn)
-45.6 C (-50.1 F)
1996
-37.2 C (-35.0 F)
81
Wettest day (Rx1day)
152.4 mm (6.0 in)
1999
45.7 mm (1.8 in)
81
Wettest five days (Rx5day)
203.2 mm (8.0 in)
1999
69.9 mm (2.8 in)
80
Longest dry spell (CDD)
92 days
1999
30 days
80
Hottest day (TXx)
The hottest day of the year at Belcourt Keya Radio, 1945 to 2026. The record is 40.6 C (105.1 F) in 2021, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Belcourt Keya Radio by year
Year
Hottest day (TXx)
1945
35.0 C (95.0 F)
1946
36.1 C (97.0 F)
1947
36.1 C (97.0 F)
1948
33.9 C (93.0 F)
1949
38.3 C (100.9 F)
1950
32.2 C (90.0 F)
1951
35.0 C (95.0 F)
1952
34.4 C (93.9 F)
1953
32.8 C (91.0 F)
1954
31.7 C (89.1 F)
1955
35.0 C (95.0 F)
1956
34.4 C (93.9 F)
1957
36.7 C (98.1 F)
1958
36.1 C (97.0 F)
1959
37.2 C (99.0 F)
1960
37.8 C (100.0 F)
1961
36.1 C (97.0 F)
1962
31.7 C (89.1 F)
1963
35.6 C (96.1 F)
1964
36.1 C (97.0 F)
1965
32.2 C (90.0 F)
1966
32.2 C (90.0 F)
1967
33.9 C (93.0 F)
1968
33.9 C (93.0 F)
1969
34.4 C (93.9 F)
1970
34.4 C (93.9 F)
1971
35.6 C (96.1 F)
1972
34.4 C (93.9 F)
1973
32.2 C (90.0 F)
1974
33.3 C (91.9 F)
1975
36.7 C (98.1 F)
1976
36.1 C (97.0 F)
1977
34.4 C (93.9 F)
1978
1.7 C (35.1 F)
1979
35.0 C (95.0 F)
1980
35.0 C (95.0 F)
1981
34.4 C (93.9 F)
1982
30.0 C (86.0 F)
1983
36.7 C (98.1 F)
1984
35.6 C (96.1 F)
1985
33.3 C (91.9 F)
1986
33.3 C (91.9 F)
1988
38.3 C (100.9 F)
1989
36.7 C (98.1 F)
1990
31.7 C (89.1 F)
1991
34.4 C (93.9 F)
1992
33.3 C (91.9 F)
1993
31.7 C (89.1 F)
1994
30.0 C (86.0 F)
1995
35.0 C (95.0 F)
1996
33.3 C (91.9 F)
1997
33.3 C (91.9 F)
1998
34.4 C (93.9 F)
1999
32.8 C (91.0 F)
2000
32.2 C (90.0 F)
2001
33.9 C (93.0 F)
2002
34.4 C (93.9 F)
2003
34.4 C (93.9 F)
2004
31.1 C (88.0 F)
2005
32.2 C (90.0 F)
2006
34.4 C (93.9 F)
2007
34.4 C (93.9 F)
2008
32.2 C (90.0 F)
2009
35.6 C (96.1 F)
2010
33.9 C (93.0 F)
2011
33.3 C (91.9 F)
2012
34.4 C (93.9 F)
2013
33.9 C (93.0 F)
2014
31.1 C (88.0 F)
2015
35.0 C (95.0 F)
2016
31.7 C (89.1 F)
2017
33.3 C (91.9 F)
2018
36.7 C (98.1 F)
2019
32.8 C (91.0 F)
2020
38.3 C (100.9 F)
2021
40.6 C (105.1 F)
2022
35.6 C (96.1 F)
2023
34.4 C (93.9 F)
2024
34.4 C (93.9 F)
2025
34.4 C (93.9 F)
2026
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Belcourt Keya Radio, 1945 to 2026. The record is -45.6 C (-50.1 F) in 1996, marked on the chart; the median year is -37.2 C (-35.0 F).
Coldest night (TNn) at Belcourt Keya Radio by year
Year
Coldest night (TNn)
1945
-36.1 C (-33.0 F)
1946
-34.4 C (-29.9 F)
1947
-39.4 C (-38.9 F)
1948
-38.9 C (-38.0 F)
1949
-42.2 C (-44.0 F)
1950
-41.1 C (-42.0 F)
1951
-38.9 C (-38.0 F)
1952
-36.7 C (-34.1 F)
1953
-33.3 C (-27.9 F)
1954
-39.4 C (-38.9 F)
1955
-42.8 C (-45.0 F)
1956
-37.8 C (-36.0 F)
1957
-40.0 C (-40.0 F)
1958
-38.3 C (-36.9 F)
1959
-40.6 C (-41.1 F)
1960
-35.6 C (-32.1 F)
1961
-40.6 C (-41.1 F)
1962
-41.7 C (-43.1 F)
1963
-35.6 C (-32.1 F)
1964
-36.7 C (-34.1 F)
1965
-38.3 C (-36.9 F)
1966
-40.0 C (-40.0 F)
1967
-41.1 C (-42.0 F)
1968
-40.0 C (-40.0 F)
1969
-35.0 C (-31.0 F)
1970
-39.4 C (-38.9 F)
1971
-36.7 C (-34.1 F)
1972
-40.0 C (-40.0 F)
1973
-35.6 C (-32.1 F)
1974
-37.8 C (-36.0 F)
1975
-33.9 C (-29.0 F)
1976
-35.6 C (-32.1 F)
1977
-37.2 C (-35.0 F)
1978
-31.7 C (-25.1 F)
1979
-40.0 C (-40.0 F)
1980
-37.8 C (-36.0 F)
1981
-38.3 C (-36.9 F)
1982
-39.4 C (-38.9 F)
1983
-40.0 C (-40.0 F)
1984
-36.7 C (-34.1 F)
1985
-38.9 C (-38.0 F)
1986
-37.8 C (-36.0 F)
1988
-33.9 C (-29.0 F)
1989
-41.1 C (-42.0 F)
1990
-31.1 C (-24.0 F)
1991
-36.7 C (-34.1 F)
1992
-37.8 C (-36.0 F)
1993
-40.0 C (-40.0 F)
1994
-42.2 C (-44.0 F)
1995
-34.4 C (-29.9 F)
1996
-45.6 C (-50.1 F)
1997
-38.9 C (-38.0 F)
1998
-36.1 C (-33.0 F)
1999
-31.7 C (-25.1 F)
2000
-35.6 C (-32.1 F)
2001
-37.2 C (-35.0 F)
2002
-30.0 C (-22.0 F)
2003
-37.2 C (-35.0 F)
2004
-38.3 C (-36.9 F)
2005
-39.4 C (-38.9 F)
2006
-35.6 C (-32.1 F)
2007
-37.8 C (-36.0 F)
2008
-37.8 C (-36.0 F)
2009
-36.7 C (-34.1 F)
2010
-35.0 C (-31.0 F)
2011
-33.3 C (-27.9 F)
2012
-32.2 C (-26.0 F)
2013
-36.1 C (-33.0 F)
2014
-36.1 C (-33.0 F)
2015
-39.4 C (-38.9 F)
2016
-33.9 C (-29.0 F)
2017
-35.6 C (-32.1 F)
2018
-35.6 C (-32.1 F)
2019
-41.1 C (-42.0 F)
2020
-32.2 C (-26.0 F)
2021
-41.1 C (-42.0 F)
2022
-35.6 C (-32.1 F)
2023
-34.4 C (-29.9 F)
2024
-27.8 C (-18.0 F)
2025
-33.9 C (-29.0 F)
2026
-35.6 C (-32.1 F)
Wettest day (Rx1day)
The wettest day of the year at Belcourt Keya Radio, 1945 to 2026. The record is 152.4 mm (6.0 in) in 1999, marked on the chart; the median year is 45.7 mm (1.8 in).
Wettest day (Rx1day) at Belcourt Keya Radio by year
Year
Wettest day (Rx1day)
1945
44.7 mm (1.8 in)
1946
38.9 mm (1.5 in)
1947
39.1 mm (1.5 in)
1948
35.6 mm (1.4 in)
1949
30.2 mm (1.2 in)
1950
45.7 mm (1.8 in)
1951
80.0 mm (3.1 in)
1952
43.7 mm (1.7 in)
1953
29.2 mm (1.1 in)
1954
77.0 mm (3.0 in)
1955
33.0 mm (1.3 in)
1956
36.8 mm (1.4 in)
1957
72.4 mm (2.9 in)
1958
27.4 mm (1.1 in)
1959
70.9 mm (2.8 in)
1960
50.5 mm (2.0 in)
1961
23.1 mm (0.9 in)
1962
32.3 mm (1.3 in)
1963
76.2 mm (3.0 in)
1964
44.5 mm (1.8 in)
1965
109.2 mm (4.3 in)
1966
71.9 mm (2.8 in)
1967
32.5 mm (1.3 in)
1968
88.4 mm (3.5 in)
1969
33.3 mm (1.3 in)
1970
39.1 mm (1.5 in)
1971
54.1 mm (2.1 in)
1972
45.5 mm (1.8 in)
1973
28.7 mm (1.1 in)
1974
39.4 mm (1.6 in)
1975
56.1 mm (2.2 in)
1976
53.3 mm (2.1 in)
1977
61.0 mm (2.4 in)
1978
4.6 mm (0.18 in)
1979
42.2 mm (1.7 in)
1980
70.4 mm (2.8 in)
1981
42.7 mm (1.7 in)
1982
53.6 mm (2.1 in)
1983
45.5 mm (1.8 in)
1984
34.3 mm (1.4 in)
1985
40.4 mm (1.6 in)
1986
37.1 mm (1.5 in)
1988
25.4 mm (1.0 in)
1989
57.2 mm (2.3 in)
1990
38.9 mm (1.5 in)
1991
76.2 mm (3.0 in)
1992
22.6 mm (0.9 in)
1993
65.3 mm (2.6 in)
1994
37.6 mm (1.5 in)
1995
31.0 mm (1.2 in)
1996
68.6 mm (2.7 in)
1997
88.9 mm (3.5 in)
1998
71.4 mm (2.8 in)
1999
152.4 mm (6.0 in)
2000
66.0 mm (2.6 in)
2001
67.3 mm (2.6 in)
2002
88.9 mm (3.5 in)
2003
101.6 mm (4.0 in)
2004
55.9 mm (2.2 in)
2005
63.5 mm (2.5 in)
2006
23.4 mm (0.9 in)
2007
63.5 mm (2.5 in)
2008
39.1 mm (1.5 in)
2009
76.2 mm (3.0 in)
2010
76.2 mm (3.0 in)
2011
101.6 mm (4.0 in)
2012
24.4 mm (1.0 in)
2013
46.5 mm (1.8 in)
2014
51.3 mm (2.0 in)
2015
101.6 mm (4.0 in)
2016
50.8 mm (2.0 in)
2017
35.3 mm (1.4 in)
2018
60.5 mm (2.4 in)
2019
74.9 mm (2.9 in)
2020
32.5 mm (1.3 in)
2021
53.3 mm (2.1 in)
2022
26.9 mm (1.1 in)
2023
23.6 mm (0.9 in)
2024
49.5 mm (1.9 in)
2025
41.9 mm (1.6 in)
2026
30.0 mm (1.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Belcourt Keya Radio, 1945 to 2026. The record is 203.2 mm (8.0 in) in 1999, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest five days (Rx5day) at Belcourt Keya Radio by year
Year
Wettest five days (Rx5day)
1945
66.0 mm (2.6 in)
1946
71.9 mm (2.8 in)
1947
62.9 mm (2.5 in)
1948
66.1 mm (2.6 in)
1949
41.9 mm (1.6 in)
1950
81.0 mm (3.2 in)
1951
87.6 mm (3.4 in)
1952
77.2 mm (3.0 in)
1953
54.5 mm (2.1 in)
1954
167.4 mm (6.6 in)
1955
48.2 mm (1.9 in)
1956
42.3 mm (1.7 in)
1957
72.4 mm (2.9 in)
1958
68.8 mm (2.7 in)
1959
102.4 mm (4.0 in)
1960
83.8 mm (3.3 in)
1961
52.3 mm (2.1 in)
1962
74.0 mm (2.9 in)
1963
93.5 mm (3.7 in)
1964
78.7 mm (3.1 in)
1965
150.2 mm (5.9 in)
1966
82.1 mm (3.2 in)
1967
44.4 mm (1.7 in)
1968
99.8 mm (3.9 in)
1969
87.9 mm (3.5 in)
1970
66.1 mm (2.6 in)
1971
67.1 mm (2.6 in)
1972
51.9 mm (2.0 in)
1973
71.8 mm (2.8 in)
1974
75.6 mm (3.0 in)
1975
74.4 mm (2.9 in)
1976
111.5 mm (4.4 in)
1977
68.7 mm (2.7 in)
1978
4.6 mm (0.18 in)
1979
57.7 mm (2.3 in)
1980
84.1 mm (3.3 in)
1981
42.7 mm (1.7 in)
1982
72.7 mm (2.9 in)
1983
52.3 mm (2.1 in)
1984
51.6 mm (2.0 in)
1985
67.1 mm (2.6 in)
1986
63.0 mm (2.5 in)
1988
34.5 mm (1.4 in)
1989
84.1 mm (3.3 in)
1990
78.3 mm (3.1 in)
1991
80.8 mm (3.2 in)
1992
42.7 mm (1.7 in)
1993
62.5 mm (2.5 in)
1994
47.2 mm (1.9 in)
1995
77.7 mm (3.1 in)
1996
85.1 mm (3.4 in)
1997
104.1 mm (4.1 in)
1998
98.0 mm (3.9 in)
1999
203.2 mm (8.0 in)
2000
129.0 mm (5.1 in)
2001
81.0 mm (3.2 in)
2002
103.9 mm (4.1 in)
2003
101.6 mm (4.0 in)
2004
58.4 mm (2.3 in)
2005
112.3 mm (4.4 in)
2006
24.4 mm (1.0 in)
2007
63.5 mm (2.5 in)
2008
41.2 mm (1.6 in)
2009
88.9 mm (3.5 in)
2010
101.6 mm (4.0 in)
2011
n/a
2012
41.1 mm (1.6 in)
2013
46.5 mm (1.8 in)
2014
93.7 mm (3.7 in)
2015
101.6 mm (4.0 in)
2016
57.7 mm (2.3 in)
2017
71.1 mm (2.8 in)
2018
111.8 mm (4.4 in)
2019
46.0 mm (1.8 in)
2020
36.1 mm (1.4 in)
2021
66.1 mm (2.6 in)
2022
42.9 mm (1.7 in)
2023
25.6 mm (1.0 in)
2024
61.0 mm (2.4 in)
2025
58.5 mm (2.3 in)
2026
42.7 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Belcourt Keya Radio, 1945 to 2026. The record is 92 days in 1999, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Belcourt Keya Radio by year
Year
Longest dry spell (CDD)
1945
18 days
1946
29 days
1947
22 days
1948
38 days
1949
33 days
1950
31 days
1951
26 days
1952
49 days
1953
31 days
1954
33 days
1955
19 days
1956
33 days
1957
27 days
1958
31 days
1959
49 days
1960
34 days
1961
55 days
1962
24 days
1963
38 days
1964
39 days
1965
43 days
1966
25 days
1967
25 days
1968
22 days
1969
53 days
1970
22 days
1971
59 days
1972
86 days
1973
63 days
1974
43 days
1975
17 days
1976
27 days
1977
27 days
1978
18 days
1979
22 days
1980
47 days
1981
46 days
1982
26 days
1983
36 days
1984
24 days
1985
34 days
1986
23 days
1988
24 days
1989
41 days
1990
35 days
1991
19 days
1992
25 days
1993
23 days
1994
39 days
1995
22 days
1996
24 days
1997
54 days
1998
51 days
1999
92 days
2000
41 days
2001
47 days
2002
29 days
2003
26 days
2004
33 days
2005
43 days
2006
29 days
2007
29 days
2008
23 days
2009
38 days
2010
30 days
2011
n/a
2012
25 days
2013
22 days
2014
32 days
2015
24 days
2016
30 days
2017
38 days
2018
42 days
2019
47 days
2020
19 days
2021
22 days
2022
19 days
2023
22 days
2024
31 days
2025
22 days
2026
29 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
50 years with a frost
Across 50 years with a frost, the median last spring frost at Belcourt Keya Radio falls on 30 May and the median first autumn frost on 10 September, which leaves a median of 101 days between them.
Fitted over all years, the growing season changes by +4.8 days per decade at this station.
Frost dates and growing season at Belcourt Keya Radio
Measure
Median, all years
Earliest period
Recent period (1966 to 2025)
Recent against earliest
Fitted trend
Last spring frost
30 May
n/a
28 May
n/a
-2.2 days per decade
First autumn frost
10 September
n/a
14 September
n/a
+2.6 days per decade
Growing days
101 days
n/a
116 days
n/a
+4.8 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
50 years, 1946 to 2016
A day with at least 48.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 143.8 mm (5.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Belcourt Keya Radio: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
48.0 mm (1.9 in)
5 years
68.6 mm (2.7 in)
10 years
84.1 mm (3.3 in)
25 years
106.0 mm (4.2 in)
50 years
124.1 mm (4.9 in)
100 years
143.8 mm (5.7 in)
Longer than the 50 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, 50 years of values from 1946 to 2016.
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: 152.4 mm (6.0 in) in 1999; 109.2 mm (4.3 in) in 1965; 101.6 mm (4.0 in) in 2003.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Belcourt Keya Radio, at 1983. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1983 ran 0.3 C (0.6 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Belcourt Keya Radio, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1983
-0.3
-0.6
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 Belcourt Keya Radio standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Belcourt Keya Radio 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.