Ladner 9SW Weather Records (USC00394671)

Record envelope, standing records and threshold days for Ladner 9SW (USC00394671), South Dakota, United States, with 77 years of record.

Key Facts for Ladner 9SW

Ladner 9SW (USC00394671) is a weather station in South Dakota, United States at 45.77 latitude and -103.88 longitude, 914 m (3,000 ft) above sea level.
The station reports from 1949 to 2025, 77 years of record.
1,464 records set at Ladner 9SW still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: South Dakota, United States, 45.77 latitude, -103.88 longitude.
Elevation: 914 m (3,000 ft).
Period of record: 1949 to 2025, 77 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

20 days at or beyond a record

The band shows the record high and record low for each calendar day at Ladner 9SW. The lines show the 2026 daily maximum and minimum. 20 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Ladner 9SW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.7 C (62.1 F)	-40.6 C (-41.1 F)	2.2 C (36.0 F)	-30.6 C (-23.1 F)
Feb	20.0 C (68.0 F)	-41.1 C (-42.0 F)	8.9 C (48.0 F)	-38.9 C (-38.0 F)
Mar	28.3 C (82.9 F)	-37.8 C (-36.0 F)	22.2 C (72.0 F)	-6.7 C (19.9 F)
Apr	32.2 C (90.0 F)	-23.3 C (-9.9 F)	21.7 C (71.1 F)	-3.3 C (26.1 F)
May	33.9 C (93.0 F)	-9.4 C (15.1 F)	32.8 C (91.0 F)	3.3 C (37.9 F)
Jun	41.1 C (106.0 F)	-2.8 C (27.0 F)	28.9 C (84.0 F)	5.6 C (42.1 F)
Jul	43.9 C (111.0 F)	2.8 C (37.0 F)	35.0 C (95.0 F)	7.8 C (46.0 F)
Aug	40.6 C (105.1 F)	-0.6 C (30.9 F)	36.7 C (98.1 F)	8.9 C (48.0 F)
Sep	38.3 C (100.9 F)	-9.4 C (15.1 F)	30.6 C (87.1 F)	2.2 C (36.0 F)
Oct	33.3 C (91.9 F)	-23.3 C (-9.9 F)	27.2 C (81.0 F)	-4.4 C (24.1 F)
Nov	22.2 C (72.0 F)	-28.9 C (-20.0 F)	19.4 C (66.9 F)	-22.2 C (-8.0 F)
Dec	17.2 C (63.0 F)	-37.2 C (-35.0 F)	9.4 C (48.9 F)	-21.7 C (-7.1 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Ladner 9SW still stand. 2009 holds the most, with 108.

Standing records at Ladner 9SW by the year they were set
Year set	Standing records
2001	28
2002	67
2003	56
2004	57
2005	74
2006	51
2007	56
2008	78
2009	108
2010	26
2011	26
2012	44
2013	50
2014	58
2015	64
2016	73
2017	77
2018	66
2019	47
2020	59
2021	78
2022	55
2023	40
2024	61
2025	65

Wettest Day of Each Month

May: 102.9 mm (4.1 in)

The wettest day on record for each calendar month at Ladner 9SW. The most was 102.9 mm (4.1 in) on 2 May 2008.

Record daily precipitation for each month at Ladner 9SW
Month	Record daily precipitation (mm)	Date
Jan	7.1 mm (0.28 in)	15 January 2011
Feb	24.1 mm (0.9 in)	13 February 2007
Mar	40.6 mm (1.6 in)	17 March 2003
Apr	63.5 mm (2.5 in)	28 April 2025
May	102.9 mm (4.1 in)	2 May 2008
Jun	44.5 mm (1.8 in)	7 June 2007
Jul	47.0 mm (1.9 in)	4 July 2009
Aug	55.9 mm (2.2 in)	23 August 2014
Sep	56.4 mm (2.2 in)	30 September 2014
Oct	40.6 mm (1.6 in)	11 October 2013
Nov	23.6 mm (0.9 in)	30 November 2005
Dec	15.2 mm (0.6 in)	28 December 2003

Period of Record Coverage

2001 to 2025

25 years of record at Ladner 9SW, 2001 to 2025. 6 years have data for under 90 percent of days and are left out of rankings: 2001, 2002, 2003, 2009, 2011, 2012.

Days with data per year at Ladner 9SW
Year	Days with data	Share of year	Complete
2001	275	75%	No
2002	299	82%	No
2003	296	81%	No
2004	361	99%	Yes
2005	333	91%	Yes
2006	362	99%	Yes
2007	363	99%	Yes
2008	362	99%	Yes
2009	298	82%	No
2010	332	91%	Yes
2011	300	82%	No
2012	272	74%	No
2013	335	92%	Yes
2014	356	98%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	357	98%	Yes
2020	366	100%	Yes
2021	334	92%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	361	99%	Yes
2025	365	100%	Yes

Latest Records

No records were set at this station in the latest data.

Climate Trend

15 complete years, 2004 to 2025

One stripe for each of 15 complete years at Ladner 9SW, 2004 to 2025. Blue stripes are years cooler than the station's own mean of 6.5 C (43.7 F); red stripes are warmer. The coolest year was 2008, at 3.0 C (37.3 F), and the warmest was 2024, at 8.5 C (47.3 F). The strongest colour marks a difference of 3.6 C (6.5 F).

Annual mean temperature at Ladner 9SW as warming stripes, 2004 to 2025
Year	Annual mean temperature	Difference from the station mean
2004	6.2 C	-0.31 C
2006	7.6 C	+1.02 C
2007	5.3 C	-1.28 C
2008	3.0 C	-3.58 C
2014	5.3 C	-1.28 C
2015	7.8 C	+1.26 C
2016	8.0 C	+1.44 C
2017	7.2 C	+0.65 C
2018	5.7 C	-0.81 C
2019	4.9 C	-1.64 C
2020	7.2 C	+0.71 C
2022	5.9 C	-0.60 C
2023	7.6 C	+1.02 C
2024	8.5 C	+1.99 C
2025	7.9 C	+1.37 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

1949 to 2025

Yearly extremes at Ladner 9SW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	2005	38.9 C (102.0 F)	25
Coldest night (TNn)	-41.1 C (-42.0 F)	2021	-31.7 C (-25.1 F)	25
Wettest day (Rx1day)	102.9 mm (4.1 in)	2008	35.6 mm (1.4 in)	29
Wettest five days (Rx5day)	127.0 mm (5.0 in)	2008	53.6 mm (2.1 in)	29
Longest dry spell (CDD)	74 days	1952	29 days	29

Hottest day (TXx)

The hottest day of the year at Ladner 9SW, 1949 to 2025. The record is 43.9 C (111.0 F) in 2005, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Ladner 9SW by year
Year	Hottest day (TXx)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
2001	38.9 C (102.0 F)
2002	42.2 C (108.0 F)
2003	40.0 C (104.0 F)
2004	40.6 C (105.1 F)
2005	43.9 C (111.0 F)
2006	42.2 C (108.0 F)
2007	37.8 C (100.0 F)
2008	35.6 C (96.1 F)
2009	33.3 C (91.9 F)
2010	36.7 C (98.1 F)
2011	34.4 C (93.9 F)
2012	39.4 C (102.9 F)
2013	36.1 C (97.0 F)
2014	35.6 C (96.1 F)
2015	38.3 C (100.9 F)
2016	42.8 C (109.0 F)
2017	39.4 C (102.9 F)
2018	40.0 C (104.0 F)
2019	35.0 C (95.0 F)
2020	36.7 C (98.1 F)
2021	42.2 C (108.0 F)
2022	39.4 C (102.9 F)
2023	37.8 C (100.0 F)
2024	42.8 C (109.0 F)
2025	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Ladner 9SW, 1949 to 2025. The record is -41.1 C (-42.0 F) in 2021, marked on the chart; the median year is -31.7 C (-25.1 F).

Coldest night (TNn) at Ladner 9SW by year
Year	Coldest night (TNn)
1949	n/a
1950	n/a
1951	n/a
1952	n/a
2001	-27.2 C (-17.0 F)
2002	-28.9 C (-20.0 F)
2003	-29.4 C (-20.9 F)
2004	-31.7 C (-25.1 F)
2005	-34.4 C (-29.9 F)
2006	-28.9 C (-20.0 F)
2007	-36.7 C (-34.1 F)
2008	-33.3 C (-27.9 F)
2009	-30.0 C (-22.0 F)
2010	-25.6 C (-14.1 F)
2011	-28.3 C (-18.9 F)
2012	-26.1 C (-15.0 F)
2013	-37.2 C (-35.0 F)
2014	-37.8 C (-36.0 F)
2015	-27.2 C (-17.0 F)
2016	-30.6 C (-23.1 F)
2017	-31.7 C (-25.1 F)
2018	-36.1 C (-33.0 F)
2019	-31.7 C (-25.1 F)
2020	-25.6 C (-14.1 F)
2021	-41.1 C (-42.0 F)
2022	-37.2 C (-35.0 F)
2023	-28.9 C (-20.0 F)
2024	-40.6 C (-41.1 F)
2025	-38.9 C (-38.0 F)

Wettest day (Rx1day)

The wettest day of the year at Ladner 9SW, 1949 to 2025. The record is 102.9 mm (4.1 in) in 2008, marked on the chart; the median year is 35.6 mm (1.4 in).

Wettest day (Rx1day) at Ladner 9SW by year
Year	Wettest day (Rx1day)
1949	2.3 mm (0.09 in)
1950	2.5 mm (0.10 in)
1951	42.2 mm (1.7 in)
1952	27.9 mm (1.1 in)
2001	39.1 mm (1.5 in)
2002	27.9 mm (1.1 in)
2003	50.8 mm (2.0 in)
2004	31.8 mm (1.3 in)
2005	34.3 mm (1.4 in)
2006	54.6 mm (2.1 in)
2007	44.5 mm (1.8 in)
2008	102.9 mm (4.1 in)
2009	47.0 mm (1.9 in)
2010	30.5 mm (1.2 in)
2011	54.6 mm (2.1 in)
2012	20.3 mm (0.8 in)
2013	40.6 mm (1.6 in)
2014	56.4 mm (2.2 in)
2015	31.8 mm (1.3 in)
2016	39.4 mm (1.6 in)
2017	45.7 mm (1.8 in)
2018	38.1 mm (1.5 in)
2019	27.9 mm (1.1 in)
2020	31.8 mm (1.3 in)
2021	35.6 mm (1.4 in)
2022	25.4 mm (1.0 in)
2023	35.6 mm (1.4 in)
2024	25.4 mm (1.0 in)
2025	63.5 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Ladner 9SW, 1949 to 2025. The record is 127.0 mm (5.0 in) in 2008, marked on the chart; the median year is 53.6 mm (2.1 in).

Wettest five days (Rx5day) at Ladner 9SW by year
Year	Wettest five days (Rx5day)
1949	2.3 mm (0.09 in)
1950	3.8 mm (0.15 in)
1951	64.6 mm (2.5 in)
1952	40.7 mm (1.6 in)
2001	68.6 mm (2.7 in)
2002	35.5 mm (1.4 in)
2003	74.1 mm (2.9 in)
2004	45.3 mm (1.8 in)
2005	52.9 mm (2.1 in)
2006	105.2 mm (4.1 in)
2007	54.6 mm (2.1 in)
2008	127.0 mm (5.0 in)
2009	86.4 mm (3.4 in)
2010	52.2 mm (2.1 in)
2011	101.3 mm (4.0 in)
2012	28.7 mm (1.1 in)
2013	77.2 mm (3.0 in)
2014	87.2 mm (3.4 in)
2015	67.4 mm (2.7 in)
2016	43.2 mm (1.7 in)
2017	53.6 mm (2.1 in)
2018	44.9 mm (1.8 in)
2019	87.5 mm (3.4 in)
2020	44.7 mm (1.8 in)
2021	60.7 mm (2.4 in)
2022	38.1 mm (1.5 in)
2023	58.7 mm (2.3 in)
2024	31.5 mm (1.2 in)
2025	51.8 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Ladner 9SW, 1949 to 2025. The record is 74 days in 1952, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Ladner 9SW by year
Year	Longest dry spell (CDD)
1949	40 days
1950	14 days
1951	13 days
1952	74 days
2001	33 days
2002	27 days
2003	29 days
2004	25 days
2005	32 days
2006	36 days
2007	26 days
2008	22 days
2009	27 days
2010	29 days
2011	24 days
2012	44 days
2013	26 days
2014	29 days
2015	31 days
2016	31 days
2017	55 days
2018	24 days
2019	23 days
2020	53 days
2021	48 days
2022	41 days
2023	56 days
2024	42 days
2025	24 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.

Download the Data

Data for Ladner 9SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ladner 9SW 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).