Record envelope, standing records and threshold days for Edgemont 23 NNW (USC00392565), South Dakota, United States, with 38 years of record.
Key Facts for Edgemont 23 NNW
Edgemont 23 NNW (USC00392565) is a weather station in South Dakota, United States at 43.62 latitude and -103.92 longitude, 1,342 m (4,402 ft) above sea level.
The station reports from 1989 to 2026, 38 years of record.
1,464 records set at Edgemont 23 NNW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Edgemont 23 NNW set a daily record high minimum temperature of 19.4 C (66.9 F) on 27 July 2026.
About the Station
Location: South Dakota, United States, 43.62 latitude, -103.92 longitude.
Elevation: 1,342 m (4,402 ft).
Period of record: 1989 to 2026, 38 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
30 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 Edgemont 23 NNW. The lines show the 2026 daily maximum and minimum. 30 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Edgemont 23 NNW, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-33.3 C (-27.9 F)
12.2 C (54.0 F)
-25.0 C (-13.0 F)
Feb
19.4 C (66.9 F)
-35.6 C (-32.1 F)
17.2 C (63.0 F)
-22.2 C (-8.0 F)
Mar
29.4 C (84.9 F)
-28.9 C (-20.0 F)
29.4 C (84.9 F)
-16.7 C (1.9 F)
Apr
28.3 C (82.9 F)
-19.4 C (-2.9 F)
28.3 C (82.9 F)
-4.4 C (24.1 F)
May
33.3 C (91.9 F)
-10.0 C (14.0 F)
31.7 C (89.1 F)
-7.2 C (19.0 F)
Jun
37.8 C (100.0 F)
-1.1 C (30.0 F)
33.9 C (93.0 F)
0.6 C (33.1 F)
Jul
40.6 C (105.1 F)
3.9 C (39.0 F)
40.0 C (104.0 F)
12.2 C (54.0 F)
Aug
38.3 C (100.9 F)
1.1 C (34.0 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Edgemont 23 NNW still stand. 1992 holds the most, with 69.
Standing records at Edgemont 23 NNW by the year they were set
Year set
Standing records
1989
11
1990
50
1991
42
1992
69
1993
62
1994
40
1995
56
1996
58
1997
49
1998
43
1999
48
2000
58
2001
23
2002
32
2003
44
2004
25
2005
31
2006
51
2007
27
2008
36
2009
33
2010
25
2011
9
2012
24
2013
30
2014
36
2015
42
2016
38
2017
32
2018
29
2019
31
2020
55
2021
34
2022
38
2023
30
2024
39
2025
40
2026
44
Wettest Day of Each Month
Jul: 95.3 mm (3.8 in)
The wettest day on record for each calendar month at Edgemont 23 NNW. The most was 95.3 mm (3.8 in) on 4 July 2019.
Record daily precipitation for each month at Edgemont 23 NNW
Month
Record daily precipitation (mm)
Date
Jan
17.3 mm (0.7 in)
28 January 2000
Feb
16.8 mm (0.7 in)
5 February 2010
Mar
24.1 mm (0.9 in)
30 March 2007
Apr
49.0 mm (1.9 in)
19 April 2000
May
68.8 mm (2.7 in)
12 May 1991
Jun
43.9 mm (1.7 in)
22 June 2018
Jul
95.3 mm (3.8 in)
4 July 2019
Aug
76.2 mm (3.0 in)
18 August 2003
Sep
36.8 mm (1.4 in)
9 September 2002
Oct
46.5 mm (1.8 in)
17 October 1998
Nov
16.5 mm (0.6 in)
25 November 2012
Dec
23.9 mm (0.9 in)
13 December 1992
Period of Record Coverage
1989 to 2026
Complete yearUnder 90 percent of days
38 years of record at Edgemont 23 NNW, 1989 to 2026. 15 years have data for under 90 percent of days and are left out of rankings: 1989, 1996, 2001, 2002, 2003, 2004, 2005, 2007 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at Edgemont 23 NNW, 1990 to 2024. Blue stripes are years cooler than the station's own mean of 7.7 C (45.8 F); red stripes are warmer. The coolest year was 1993, at 5.4 C (41.7 F), and the warmest was 2024, at 9.0 C (48.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Edgemont 23 NNW as warming stripes, 1990 to 2024
Year
Annual mean temperature
Difference from the station mean
1990
7.8 C
+0.10 C
1991
7.9 C
+0.19 C
1992
7.5 C
-0.23 C
1993
5.4 C
-2.27 C
1994
8.0 C
+0.33 C
1997
7.2 C
-0.47 C
1998
8.1 C
+0.45 C
1999
8.6 C
+0.90 C
2000
7.7 C
+0.00 C
2006
8.3 C
+0.59 C
2013
6.9 C
-0.74 C
2015
8.4 C
+0.71 C
2016
8.6 C
+0.93 C
2017
7.9 C
+0.24 C
2018
6.5 C
-1.17 C
2020
7.4 C
-0.31 C
2021
7.7 C
-0.03 C
2022
6.9 C
-0.80 C
2023
7.9 C
+0.17 C
2024
9.0 C
+1.34 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
1989 to 2026
Yearly extremes at Edgemont 23 NNW: 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
37.0 C (98.5 F)
38
Coldest night (TNn)
-38.3 C (-36.9 F)
1989
-29.1 C (-20.5 F)
38
Wettest day (Rx1day)
95.3 mm (3.8 in)
2019
37.6 mm (1.5 in)
38
Wettest five days (Rx5day)
133.9 mm (5.3 in)
2019
58.3 mm (2.3 in)
38
Longest dry spell (CDD)
49 days
2026
30 days
38
Hottest day (TXx)
The hottest day of the year at Edgemont 23 NNW, 1989 to 2026. The record is 40.6 C (105.1 F) in 2006, marked on the chart; the median year is 37.0 C (98.5 F).
Hottest day (TXx) at Edgemont 23 NNW by year
Year
Hottest day (TXx)
1989
25.6 C (78.1 F)
1990
38.3 C (100.9 F)
1991
37.2 C (99.0 F)
1992
35.0 C (95.0 F)
1993
34.4 C (93.9 F)
1994
36.7 C (98.1 F)
1995
38.3 C (100.9 F)
1996
35.6 C (96.1 F)
1997
35.6 C (96.1 F)
1998
37.8 C (100.0 F)
1999
36.7 C (98.1 F)
2000
37.2 C (99.0 F)
2001
37.2 C (99.0 F)
2002
37.8 C (100.0 F)
2003
38.3 C (100.9 F)
2004
36.7 C (98.1 F)
2005
38.9 C (102.0 F)
2006
40.6 C (105.1 F)
2007
38.9 C (102.0 F)
2008
35.6 C (96.1 F)
2009
33.9 C (93.0 F)
2010
36.7 C (98.1 F)
2011
26.1 C (79.0 F)
2012
38.3 C (100.9 F)
2013
36.7 C (98.1 F)
2014
37.2 C (99.0 F)
2015
36.7 C (98.1 F)
2016
37.2 C (99.0 F)
2017
36.7 C (98.1 F)
2018
35.6 C (96.1 F)
2019
33.9 C (93.0 F)
2020
36.7 C (98.1 F)
2021
37.2 C (99.0 F)
2022
38.3 C (100.9 F)
2023
36.7 C (98.1 F)
2024
37.8 C (100.0 F)
2025
37.2 C (99.0 F)
2026
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Edgemont 23 NNW, 1989 to 2026. The record is -38.3 C (-36.9 F) in 1989, marked on the chart; the median year is -29.1 C (-20.5 F).
Coldest night (TNn) at Edgemont 23 NNW by year
Year
Coldest night (TNn)
1989
-38.3 C (-36.9 F)
1990
-38.3 C (-36.9 F)
1991
-30.0 C (-22.0 F)
1992
-28.9 C (-20.0 F)
1993
-32.8 C (-27.0 F)
1994
-32.2 C (-26.0 F)
1995
-26.1 C (-15.0 F)
1996
-35.6 C (-32.1 F)
1997
-29.4 C (-20.9 F)
1998
-30.0 C (-22.0 F)
1999
-21.7 C (-7.1 F)
2000
-28.3 C (-18.9 F)
2001
-28.3 C (-18.9 F)
2002
-27.8 C (-18.0 F)
2003
-32.2 C (-26.0 F)
2004
-23.9 C (-11.0 F)
2005
-26.1 C (-15.0 F)
2006
-32.2 C (-26.0 F)
2007
-30.0 C (-22.0 F)
2008
-30.0 C (-22.0 F)
2009
-27.2 C (-17.0 F)
2010
-24.4 C (-11.9 F)
2011
-31.1 C (-24.0 F)
2012
-13.9 C (7.0 F)
2013
-27.2 C (-17.0 F)
2014
-28.3 C (-18.9 F)
2015
-25.0 C (-13.0 F)
2016
-31.1 C (-24.0 F)
2017
-26.7 C (-16.1 F)
2018
-27.2 C (-17.0 F)
2019
-25.6 C (-14.1 F)
2020
-21.1 C (-6.0 F)
2021
-30.6 C (-23.1 F)
2022
-31.7 C (-25.1 F)
2023
-30.0 C (-22.0 F)
2024
-33.3 C (-27.9 F)
2025
-31.7 C (-25.1 F)
2026
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Edgemont 23 NNW, 1989 to 2026. The record is 95.3 mm (3.8 in) in 2019, marked on the chart; the median year is 37.6 mm (1.5 in).
Wettest day (Rx1day) at Edgemont 23 NNW by year
Year
Wettest day (Rx1day)
1989
13.0 mm (0.5 in)
1990
31.2 mm (1.2 in)
1991
68.8 mm (2.7 in)
1992
23.9 mm (0.9 in)
1993
44.5 mm (1.8 in)
1994
39.1 mm (1.5 in)
1995
32.0 mm (1.3 in)
1996
38.4 mm (1.5 in)
1997
63.5 mm (2.5 in)
1998
46.5 mm (1.8 in)
1999
59.7 mm (2.4 in)
2000
49.0 mm (1.9 in)
2001
25.9 mm (1.0 in)
2002
36.8 mm (1.4 in)
2003
76.2 mm (3.0 in)
2004
22.4 mm (0.9 in)
2005
33.3 mm (1.3 in)
2006
32.8 mm (1.3 in)
2007
24.1 mm (0.9 in)
2008
63.5 mm (2.5 in)
2009
32.3 mm (1.3 in)
2010
40.4 mm (1.6 in)
2011
31.2 mm (1.2 in)
2012
24.9 mm (1.0 in)
2013
56.6 mm (2.2 in)
2014
35.3 mm (1.4 in)
2015
54.1 mm (2.1 in)
2016
32.5 mm (1.3 in)
2017
21.8 mm (0.9 in)
2018
58.2 mm (2.3 in)
2019
95.3 mm (3.8 in)
2020
86.4 mm (3.4 in)
2021
41.1 mm (1.6 in)
2022
29.5 mm (1.2 in)
2023
33.8 mm (1.3 in)
2024
51.8 mm (2.0 in)
2025
46.2 mm (1.8 in)
2026
24.6 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Edgemont 23 NNW, 1989 to 2026. The record is 133.9 mm (5.3 in) in 2019, marked on the chart; the median year is 58.3 mm (2.3 in).
Wettest five days (Rx5day) at Edgemont 23 NNW by year
Year
Wettest five days (Rx5day)
1989
20.6 mm (0.8 in)
1990
51.3 mm (2.0 in)
1991
75.4 mm (3.0 in)
1992
39.3 mm (1.5 in)
1993
79.3 mm (3.1 in)
1994
47.7 mm (1.9 in)
1995
50.3 mm (2.0 in)
1996
55.9 mm (2.2 in)
1997
94.7 mm (3.7 in)
1998
63.5 mm (2.5 in)
1999
63.3 mm (2.5 in)
2000
61.2 mm (2.4 in)
2001
42.2 mm (1.7 in)
2002
45.2 mm (1.8 in)
2003
82.8 mm (3.3 in)
2004
33.3 mm (1.3 in)
2005
55.4 mm (2.2 in)
2006
26.0 mm (1.0 in)
2007
27.4 mm (1.1 in)
2008
73.1 mm (2.9 in)
2009
47.3 mm (1.9 in)
2010
61.3 mm (2.4 in)
2011
79.9 mm (3.1 in)
2012
35.6 mm (1.4 in)
2013
60.2 mm (2.4 in)
2014
65.6 mm (2.6 in)
2015
92.5 mm (3.6 in)
2016
57.9 mm (2.3 in)
2017
28.5 mm (1.1 in)
2018
77.4 mm (3.0 in)
2019
133.9 mm (5.3 in)
2020
91.5 mm (3.6 in)
2021
55.1 mm (2.2 in)
2022
62.6 mm (2.5 in)
2023
58.6 mm (2.3 in)
2024
58.9 mm (2.3 in)
2025
52.0 mm (2.0 in)
2026
33.8 mm (1.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Edgemont 23 NNW, 1989 to 2026. The record is 49 days in 2026, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Edgemont 23 NNW by year
Year
Longest dry spell (CDD)
1989
26 days
1990
43 days
1991
33 days
1992
29 days
1993
28 days
1994
19 days
1995
31 days
1996
23 days
1997
39 days
1998
36 days
1999
45 days
2000
25 days
2001
31 days
2002
39 days
2003
25 days
2004
35 days
2005
36 days
2006
40 days
2007
32 days
2008
26 days
2009
24 days
2010
25 days
2011
16 days
2012
20 days
2013
21 days
2014
21 days
2015
36 days
2016
36 days
2017
31 days
2018
23 days
2019
17 days
2020
34 days
2021
27 days
2022
32 days
2023
25 days
2024
41 days
2025
25 days
2026
49 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 Edgemont 23 NNW falls on 17 May and the median first autumn frost on 26 September, which leaves a median of 141 days between them.
Frost dates and growing season at Edgemont 23 NNW
Measure
Median, all years
Earliest period
Recent period (1990 to 2024)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
17 May
n/a
n/a
First autumn frost
26 September
n/a
26 September
n/a
n/a
Growing days
141 days
n/a
141 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.
Download the Data
Data for Edgemont 23 NNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Edgemont 23 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.