Belle Fourche 22 NNW Weather Records (USC00390565)
Record envelope, standing records and threshold days for Belle Fourche 22 NNW (USC00390565), South Dakota, United States, with 47 years of record.
Key Facts for Belle Fourche 22 NNW
Belle Fourche 22 NNW (USC00390565) is a weather station in South Dakota, United States at 44.99 latitude and -103.93 longitude, 975 m (3,200 ft) above sea level.
The station reports from 1980 to 2026, 47 years of record.
1,464 records set at Belle Fourche 22 NNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Belle Fourche 22 NNW set a daily record low minimum temperature of 5.0 C (41.0 F) on 4 August 2026.
About the Station
Location: South Dakota, United States, 44.99 latitude, -103.93 longitude.
Elevation: 975 m (3,200 ft).
Period of record: 1980 to 2026, 47 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
24 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 Belle Fourche 22 NNW. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Belle Fourche 22 NNW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-35.0 C (-31.0 F)
15.0 C (59.0 F)
-26.1 C (-15.0 F)
Feb
23.3 C (73.9 F)
-39.4 C (-38.9 F)
19.4 C (66.9 F)
-22.2 C (-8.0 F)
Mar
27.8 C (82.0 F)
-35.6 C (-32.1 F)
27.8 C (82.0 F)
-19.4 C (-2.9 F)
Apr
31.7 C (89.1 F)
-21.7 C (-7.1 F)
30.6 C (87.1 F)
-10.0 C (14.0 F)
May
35.6 C (96.1 F)
-8.9 C (16.0 F)
32.8 C (91.0 F)
-7.8 C (18.0 F)
Jun
42.8 C (109.0 F)
-5.0 C (23.0 F)
34.4 C (93.9 F)
3.3 C (37.9 F)
Jul
43.3 C (109.9 F)
1.1 C (34.0 F)
43.3 C (109.9 F)
12.2 C (54.0 F)
Aug
41.7 C (107.1 F)
1.7 C (35.1 F)
38.9 C (102.0 F)
5.0 C (41.0 F)
Sep
40.0 C (104.0 F)
-13.3 C (8.1 F)
n/a
n/a
Oct
33.9 C (93.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
20.0 C (68.0 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Belle Fourche 22 NNW still stand. 1985 holds the most, with 74.
Standing records at Belle Fourche 22 NNW by the year they were set
Year set
Standing records
1980
32
1981
32
1982
26
1983
39
1984
38
1985
74
1986
38
1987
37
1988
67
1989
66
1990
48
1991
50
1992
55
1993
31
1994
28
1995
44
1996
50
1997
49
1998
27
1999
26
2000
36
2001
13
2002
27
2003
32
2004
13
2005
30
2006
14
2007
26
2008
15
2009
14
2010
10
2011
15
2012
17
2013
30
2014
11
2015
4
2016
23
2017
22
2018
29
2019
21
2020
37
2021
35
2022
28
2023
27
2024
27
2025
27
2026
24
All-Time Record Progression
1 new records
1 all-time records were set at Belle Fourche 22 NNW between 7 August 2023 and 7 August 2023. Each dot is a new record.
When Belle Fourche 22 NNW set new all-time records
Date
Kind
Detail
2023-08-07
Record daily precipitation
Record daily precipitation 125.0 mm (4.9 in)
Wettest Day of Each Month
Aug: 125.0 mm (4.9 in)
The wettest day on record for each calendar month at Belle Fourche 22 NNW. The most was 125.0 mm (4.9 in) on 7 August 2023.
Record daily precipitation for each month at Belle Fourche 22 NNW
Month
Record daily precipitation (mm)
Date
Jan
10.2 mm (0.4 in)
21 January 1986
Feb
12.7 mm (0.5 in)
18 February 1991
Mar
38.1 mm (1.5 in)
23 March 2009
Apr
48.8 mm (1.9 in)
25 April 2022
May
66.5 mm (2.6 in)
20 May 1982
Jun
61.0 mm (2.4 in)
30 June 1993
Jul
58.4 mm (2.3 in)
1 July 2004
Aug
125.0 mm (4.9 in)
7 August 2023
Sep
55.4 mm (2.2 in)
11 September 2003
Oct
45.2 mm (1.8 in)
13 October 2021
Nov
54.6 mm (2.1 in)
1 November 2000
Dec
15.7 mm (0.6 in)
3 December 2013
Period of Record Coverage
1980 to 2026
Complete yearUnder 90 percent of days
47 years of record at Belle Fourche 22 NNW, 1980 to 2026. 17 years have data for under 90 percent of days and are left out of rankings: 1980, 2001, 2002, 2003, 2004, 2005, 2006, 2007 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 27 complete years at Belle Fourche 22 NNW, 1981 to 2024. Blue stripes are years cooler than the station's own mean of 7.2 C (44.9 F); red stripes are warmer. The coolest year was 1996, at 4.8 C (40.7 F), and the warmest was 2016, at 8.9 C (48.0 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Belle Fourche 22 NNW as warming stripes, 1981 to 2024
Year
Annual mean temperature
Difference from the station mean
1981
8.1 C
+0.93 C
1982
5.2 C
-1.98 C
1983
6.5 C
-0.66 C
1985
5.0 C
-2.17 C
1986
7.1 C
-0.04 C
1987
8.6 C
+1.40 C
1988
8.2 C
+1.03 C
1989
6.3 C
-0.84 C
1990
7.7 C
+0.57 C
1991
7.7 C
+0.59 C
1992
7.5 C
+0.37 C
1993
4.9 C
-2.24 C
1994
7.2 C
0.00 C
1995
6.9 C
-0.24 C
1996
4.8 C
-2.31 C
1997
7.1 C
-0.03 C
1998
7.9 C
+0.72 C
1999
8.3 C
+1.14 C
2000
7.5 C
+0.34 C
2016
8.9 C
+1.76 C
2018
6.1 C
-1.03 C
2019
5.6 C
-1.54 C
2020
7.8 C
+0.65 C
2021
8.3 C
+1.12 C
2022
7.1 C
-0.07 C
2023
8.0 C
+0.87 C
2024
8.9 C
+1.71 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
1980 to 2026
Yearly extremes at Belle Fourche 22 NNW: 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)
2006
39.4 C (102.9 F)
47
Coldest night (TNn)
-40.0 C (-40.0 F)
1989
-31.1 C (-24.0 F)
47
Wettest day (Rx1day)
125.0 mm (4.9 in)
2023
36.6 mm (1.4 in)
47
Wettest five days (Rx5day)
128.3 mm (5.1 in)
2011
52.6 mm (2.1 in)
47
Longest dry spell (CDD)
83 days
2023
36 days
47
Hottest day (TXx)
The hottest day of the year at Belle Fourche 22 NNW, 1980 to 2026. The record is 43.3 C (109.9 F) in 2006, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Belle Fourche 22 NNW by year
Year
Hottest day (TXx)
1980
41.1 C (106.0 F)
1981
42.8 C (109.0 F)
1982
38.3 C (100.9 F)
1983
40.0 C (104.0 F)
1984
38.3 C (100.9 F)
1985
40.0 C (104.0 F)
1986
39.4 C (102.9 F)
1987
37.8 C (100.0 F)
1988
40.6 C (105.1 F)
1989
40.6 C (105.1 F)
1990
40.6 C (105.1 F)
1991
38.9 C (102.0 F)
1992
37.2 C (99.0 F)
1993
32.2 C (90.0 F)
1994
37.8 C (100.0 F)
1995
39.4 C (102.9 F)
1996
37.8 C (100.0 F)
1997
37.8 C (100.0 F)
1998
38.3 C (100.9 F)
1999
38.3 C (100.9 F)
2000
40.6 C (105.1 F)
2001
41.7 C (107.1 F)
2002
42.8 C (109.0 F)
2003
41.7 C (107.1 F)
2004
40.0 C (104.0 F)
2005
42.8 C (109.0 F)
2006
43.3 C (109.9 F)
2007
41.7 C (107.1 F)
2008
38.3 C (100.9 F)
2009
36.7 C (98.1 F)
2010
41.1 C (106.0 F)
2011
37.8 C (100.0 F)
2012
41.7 C (107.1 F)
2013
35.0 C (95.0 F)
2014
31.1 C (88.0 F)
2015
28.9 C (84.0 F)
2016
41.1 C (106.0 F)
2017
39.4 C (102.9 F)
2018
39.4 C (102.9 F)
2019
36.1 C (97.0 F)
2020
37.8 C (100.0 F)
2021
42.8 C (109.0 F)
2022
40.0 C (104.0 F)
2023
39.4 C (102.9 F)
2024
43.3 C (109.9 F)
2025
38.9 C (102.0 F)
2026
43.3 C (109.9 F)
Coldest night (TNn)
The coldest night of the year at Belle Fourche 22 NNW, 1980 to 2026. The record is -40.0 C (-40.0 F) in 1989, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Belle Fourche 22 NNW by year
Year
Coldest night (TNn)
1980
-28.9 C (-20.0 F)
1981
-29.4 C (-20.9 F)
1982
-34.4 C (-29.9 F)
1983
-37.2 C (-35.0 F)
1984
-29.4 C (-20.9 F)
1985
-35.0 C (-31.0 F)
1986
-28.3 C (-18.9 F)
1987
-20.6 C (-5.1 F)
1988
-32.2 C (-26.0 F)
1989
-40.0 C (-40.0 F)
1990
-38.3 C (-36.9 F)
1991
-28.9 C (-20.0 F)
1992
-27.2 C (-17.0 F)
1993
-31.7 C (-25.1 F)
1994
-39.4 C (-38.9 F)
1995
-29.4 C (-20.9 F)
1996
-35.6 C (-32.1 F)
1997
-31.1 C (-24.0 F)
1998
-35.6 C (-32.1 F)
1999
-25.6 C (-14.1 F)
2000
-31.1 C (-24.0 F)
2001
-30.6 C (-23.1 F)
2002
-28.9 C (-20.0 F)
2003
-27.2 C (-17.0 F)
2004
-23.9 C (-11.0 F)
2005
-31.1 C (-24.0 F)
2006
-27.8 C (-18.0 F)
2007
-35.6 C (-32.1 F)
2008
-30.0 C (-22.0 F)
2009
-27.8 C (-18.0 F)
2010
-30.6 C (-23.1 F)
2011
-31.1 C (-24.0 F)
2012
-26.1 C (-15.0 F)
2013
-33.3 C (-27.9 F)
2014
-33.9 C (-29.0 F)
2015
-26.1 C (-15.0 F)
2016
-30.0 C (-22.0 F)
2017
-31.1 C (-24.0 F)
2018
-33.9 C (-29.0 F)
2019
-32.2 C (-26.0 F)
2020
-28.9 C (-20.0 F)
2021
-37.2 C (-35.0 F)
2022
-33.3 C (-27.9 F)
2023
-30.0 C (-22.0 F)
2024
-35.0 C (-31.0 F)
2025
-33.3 C (-27.9 F)
2026
-26.1 C (-15.0 F)
Wettest day (Rx1day)
The wettest day of the year at Belle Fourche 22 NNW, 1980 to 2026. The record is 125.0 mm (4.9 in) in 2023, marked on the chart; the median year is 36.6 mm (1.4 in).
Wettest day (Rx1day) at Belle Fourche 22 NNW by year
Year
Wettest day (Rx1day)
1980
25.7 mm (1.0 in)
1981
24.1 mm (0.9 in)
1982
66.5 mm (2.6 in)
1983
42.9 mm (1.7 in)
1984
48.0 mm (1.9 in)
1985
22.1 mm (0.9 in)
1986
38.1 mm (1.5 in)
1987
32.3 mm (1.3 in)
1988
53.1 mm (2.1 in)
1989
38.9 mm (1.5 in)
1990
23.4 mm (0.9 in)
1991
15.2 mm (0.6 in)
1992
31.0 mm (1.2 in)
1993
61.0 mm (2.4 in)
1994
34.0 mm (1.3 in)
1995
48.5 mm (1.9 in)
1996
26.4 mm (1.0 in)
1997
31.0 mm (1.2 in)
1998
29.7 mm (1.2 in)
1999
32.3 mm (1.3 in)
2000
54.6 mm (2.1 in)
2001
24.9 mm (1.0 in)
2002
20.3 mm (0.8 in)
2003
55.4 mm (2.2 in)
2004
58.4 mm (2.3 in)
2005
30.0 mm (1.2 in)
2006
14.7 mm (0.6 in)
2007
25.9 mm (1.0 in)
2008
63.5 mm (2.5 in)
2009
38.1 mm (1.5 in)
2010
27.4 mm (1.1 in)
2011
63.5 mm (2.5 in)
2012
19.1 mm (0.8 in)
2013
61.5 mm (2.4 in)
2014
31.8 mm (1.3 in)
2015
48.8 mm (1.9 in)
2016
34.3 mm (1.4 in)
2017
39.1 mm (1.5 in)
2018
47.0 mm (1.9 in)
2019
48.3 mm (1.9 in)
2020
26.2 mm (1.0 in)
2021
45.2 mm (1.8 in)
2022
48.8 mm (1.9 in)
2023
125.0 mm (4.9 in)
2024
34.3 mm (1.4 in)
2025
36.6 mm (1.4 in)
2026
37.1 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Belle Fourche 22 NNW, 1980 to 2026. The record is 128.3 mm (5.1 in) in 2011, marked on the chart; the median year is 52.6 mm (2.1 in).
Wettest five days (Rx5day) at Belle Fourche 22 NNW by year
Year
Wettest five days (Rx5day)
1980
46.5 mm (1.8 in)
1981
54.1 mm (2.1 in)
1982
101.0 mm (4.0 in)
1983
51.2 mm (2.0 in)
1984
84.4 mm (3.3 in)
1985
24.9 mm (1.0 in)
1986
50.1 mm (2.0 in)
1987
64.6 mm (2.5 in)
1988
53.1 mm (2.1 in)
1989
81.3 mm (3.2 in)
1990
39.1 mm (1.5 in)
1991
36.0 mm (1.4 in)
1992
64.3 mm (2.5 in)
1993
75.0 mm (3.0 in)
1994
54.4 mm (2.1 in)
1995
80.6 mm (3.2 in)
1996
78.3 mm (3.1 in)
1997
63.0 mm (2.5 in)
1998
65.0 mm (2.6 in)
1999
61.9 mm (2.4 in)
2000
70.9 mm (2.8 in)
2001
48.8 mm (1.9 in)
2002
20.3 mm (0.8 in)
2003
60.5 mm (2.4 in)
2004
66.7 mm (2.6 in)
2005
38.8 mm (1.5 in)
2006
17.5 mm (0.7 in)
2007
38.6 mm (1.5 in)
2008
76.2 mm (3.0 in)
2009
38.1 mm (1.5 in)
2010
49.8 mm (2.0 in)
2011
128.3 mm (5.1 in)
2012
23.4 mm (0.9 in)
2013
89.4 mm (3.5 in)
2014
50.3 mm (2.0 in)
2015
51.6 mm (2.0 in)
2016
35.6 mm (1.4 in)
2017
45.8 mm (1.8 in)
2018
64.5 mm (2.5 in)
2019
102.9 mm (4.1 in)
2020
44.8 mm (1.8 in)
2021
46.5 mm (1.8 in)
2022
48.8 mm (1.9 in)
2023
125.0 mm (4.9 in)
2024
34.8 mm (1.4 in)
2025
52.6 mm (2.1 in)
2026
38.4 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Belle Fourche 22 NNW, 1980 to 2026. The record is 83 days in 2023, marked on the chart; the median year is 36 days.
Longest dry spell (CDD) at Belle Fourche 22 NNW by year
Year
Longest dry spell (CDD)
1980
25 days
1981
51 days
1982
22 days
1983
20 days
1984
60 days
1985
60 days
1986
30 days
1987
64 days
1988
40 days
1989
25 days
1990
38 days
1991
40 days
1992
51 days
1993
36 days
1994
26 days
1995
40 days
1996
31 days
1997
67 days
1998
31 days
1999
51 days
2000
28 days
2001
48 days
2002
25 days
2003
26 days
2004
27 days
2005
33 days
2006
51 days
2007
43 days
2008
31 days
2009
36 days
2010
32 days
2011
31 days
2012
34 days
2013
59 days
2014
25 days
2015
22 days
2016
21 days
2017
49 days
2018
26 days
2019
21 days
2020
66 days
2021
48 days
2022
20 days
2023
83 days
2024
41 days
2025
39 days
2026
48 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
27 years with a frost
Across 27 years with a frost, the median last spring frost at Belle Fourche 22 NNW falls on 15 May and the median first autumn frost on 21 September, which leaves a median of 135 days between them.
Fitted over all years, the growing season changes by +4.7 days per decade at this station.
Frost dates and growing season at Belle Fourche 22 NNW
Measure
Median, all years
Earliest period
Recent period (1981 to 2024)
Recent against earliest
Fitted trend
Last spring frost
15 May
n/a
15 May
n/a
-0.8 days per decade
First autumn frost
21 September
n/a
21 September
n/a
+3.9 days per decade
Growing days
135 days
n/a
135 days
n/a
+4.7 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
31 years, 1981 to 2025
A day with at least 37.4 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 112.9 mm (4.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Belle Fourche 22 NNW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
37.4 mm (1.5 in)
5 years
52.9 mm (2.1 in)
10 years
64.8 mm (2.6 in)
25 years
82.1 mm (3.2 in)
50 years
96.7 mm (3.8 in)
Longer than the 31 years of record
100 years
112.9 mm (4.4 in)
Longer than the 31 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, 31 years of values from 1981 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: 125.0 mm (4.9 in) in 2023; 66.5 mm (2.6 in) in 1982; 63.5 mm (2.5 in) in 2011.
Download the Data
Data for Belle Fourche 22 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Belle Fourche 22 NNW 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.