Oglala 1S Weather Records (USC00396227)

Record envelope, standing records and threshold days for Oglala 1S (USC00396227), South Dakota, United States, with 69 years of record.

Key Facts for Oglala 1S

Oglala 1S (USC00396227) is a weather station in South Dakota, United States at 43.17 latitude and -102.75 longitude, 913 m (2,995 ft) above sea level.
The station reports from 1948 to 2016, 69 years of record.
1,464 records set at Oglala 1S 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, 43.17 latitude, -102.75 longitude.
Elevation: 913 m (2,995 ft).
Period of record: 1948 to 2016, 69 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Oglala 1S. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Oglala 1S, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.2 C (72.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Feb	23.3 C (73.9 F)	-31.7 C (-25.1 F)	n/a	n/a
Mar	28.9 C (84.0 F)	-25.0 C (-13.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-15.0 C (5.0 F)	n/a	n/a
May	37.2 C (99.0 F)	-6.1 C (21.0 F)	n/a	n/a
Jun	42.8 C (109.0 F)	1.7 C (35.1 F)	n/a	n/a
Jul	43.3 C (109.9 F)	2.2 C (36.0 F)	n/a	n/a
Aug	41.7 C (107.1 F)	1.1 C (34.0 F)	n/a	n/a
Sep	38.9 C (102.0 F)	-1.7 C (28.9 F)	n/a	n/a
Oct	33.9 C (93.0 F)	-12.8 C (9.0 F)	n/a	n/a
Nov	31.1 C (88.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Dec	22.2 C (72.0 F)	-30.0 C (-22.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Oglala 1S still stand. 2002 holds the most, with 102.

Standing records at Oglala 1S by the year they were set
Year set	Standing records
1998	16
1999	75
2000	84
2001	62
2002	102
2003	85
2004	79
2005	91
2006	79
2007	90
2008	73
2009	83
2010	66
2011	72
2012	86
2013	84
2014	90
2015	75
2016	72

Wettest Day of Each Month

Jul: 96.5 mm (3.8 in)

The wettest day on record for each calendar month at Oglala 1S. The most was 96.5 mm (3.8 in) on 13 July 2006.

Record daily precipitation for each month at Oglala 1S
Month	Record daily precipitation (mm)	Date
Jan	20.3 mm (0.8 in)	8 January 1999
Feb	35.6 mm (1.4 in)	26 February 2000
Mar	31.2 mm (1.2 in)	1 March 2004
Apr	67.8 mm (2.7 in)	19 April 2000
May	60.5 mm (2.4 in)	10 May 2015
Jun	63.5 mm (2.5 in)	16 June 2012
Jul	96.5 mm (3.8 in)	13 July 2006
Aug	47.0 mm (1.9 in)	13 August 2005
Sep	78.0 mm (3.1 in)	5 September 2004
Oct	57.2 mm (2.3 in)	5 October 2013
Nov	45.2 mm (1.8 in)	6 November 2008
Dec	20.3 mm (0.8 in)	26 December 2009

Period of Record Coverage

1998 to 2016

19 years of record at Oglala 1S, 1998 to 2016. 5 years have data for under 90 percent of days and are left out of rankings: 1998, 2006, 2007, 2009, 2016.

Days with data per year at Oglala 1S
Year	Days with data	Share of year	Complete
1998	31	8%	No
1999	342	94%	Yes
2000	350	96%	Yes
2001	340	93%	Yes
2002	352	96%	Yes
2003	351	96%	Yes
2004	342	93%	Yes
2005	332	91%	Yes
2006	321	88%	No
2007	326	89%	No
2008	337	92%	Yes
2009	325	89%	No
2010	363	99%	Yes
2011	364	100%	Yes
2012	337	92%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	360	99%	Yes
2016	327	89%	No

Latest Records

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

Climate Trend

14 complete years, 1999 to 2015

One stripe for each of 14 complete years at Oglala 1S, 1999 to 2015. Blue stripes are years cooler than the station's own mean of 9.4 C (48.8 F); red stripes are warmer. The coolest year was 2008, at 8.3 C (47.0 F), and the warmest was 2015, at 10.1 C (50.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Oglala 1S as warming stripes, 1999 to 2015
Year	Annual mean temperature	Difference from the station mean
1999	10.1 C	+0.71 C
2000	9.2 C	-0.20 C
2001	9.6 C	+0.20 C
2002	9.1 C	-0.23 C
2003	9.9 C	+0.57 C
2004	9.9 C	+0.56 C
2005	9.9 C	+0.49 C
2007	10.0 C	+0.65 C
2008	8.3 C	-1.03 C
2010	8.8 C	-0.56 C
2011	8.7 C	-0.66 C
2013	8.7 C	-0.62 C
2014	8.8 C	-0.60 C
2015	10.1 C	+0.72 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

1948 to 2016

Yearly extremes at Oglala 1S: 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)	2003	40.0 C (104.0 F)	19
Coldest night (TNn)	-31.7 C (-25.1 F)	2007	-27.2 C (-17.0 F)	19
Wettest day (Rx1day)	96.5 mm (3.8 in)	2006	41.1 mm (1.6 in)	23
Wettest five days (Rx5day)	101.4 mm (4.0 in)	2015	66.0 mm (2.6 in)	23
Longest dry spell (CDD)	44 days	2003	31 days	23

Hottest day (TXx)

The hottest day of the year at Oglala 1S, 1948 to 2016. The record is 43.3 C (109.9 F) in 2003, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Oglala 1S by year
Year	Hottest day (TXx)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1998	21.1 C (70.0 F)
1999	37.2 C (99.0 F)
2000	38.3 C (100.9 F)
2001	39.4 C (102.9 F)
2002	42.2 C (108.0 F)
2003	43.3 C (109.9 F)
2004	41.7 C (107.1 F)
2005	40.6 C (105.1 F)
2006	41.7 C (107.1 F)
2007	42.8 C (109.0 F)
2008	37.8 C (100.0 F)
2009	38.3 C (100.9 F)
2010	40.0 C (104.0 F)
2011	40.0 C (104.0 F)
2012	41.1 C (106.0 F)
2013	37.8 C (100.0 F)
2014	38.9 C (102.0 F)
2015	38.3 C (100.9 F)
2016	40.6 C (105.1 F)

Coldest night (TNn)

The coldest night of the year at Oglala 1S, 1948 to 2016. The record is -31.7 C (-25.1 F) in 2007, marked on the chart; the median year is -27.2 C (-17.0 F).

Coldest night (TNn) at Oglala 1S by year
Year	Coldest night (TNn)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1998	-27.2 C (-17.0 F)
1999	-23.3 C (-9.9 F)
2000	-27.2 C (-17.0 F)
2001	-28.9 C (-20.0 F)
2002	-24.4 C (-11.9 F)
2003	-28.9 C (-20.0 F)
2004	-23.3 C (-9.9 F)
2005	-27.2 C (-17.0 F)
2006	-28.9 C (-20.0 F)
2007	-31.7 C (-25.1 F)
2008	-30.0 C (-22.0 F)
2009	-27.2 C (-17.0 F)
2010	-30.6 C (-23.1 F)
2011	-29.4 C (-20.9 F)
2012	-23.9 C (-11.0 F)
2013	-30.0 C (-22.0 F)
2014	-26.1 C (-15.0 F)
2015	-22.8 C (-9.0 F)
2016	-20.6 C (-5.1 F)

Wettest day (Rx1day)

The wettest day of the year at Oglala 1S, 1948 to 2016. The record is 96.5 mm (3.8 in) in 2006, marked on the chart; the median year is 41.1 mm (1.6 in).

Wettest day (Rx1day) at Oglala 1S by year
Year	Wettest day (Rx1day)
1948	36.6 mm (1.4 in)
1949	22.9 mm (0.9 in)
1950	23.4 mm (0.9 in)
1951	21.6 mm (0.9 in)
1998	1.8 mm (0.07 in)
1999	52.1 mm (2.1 in)
2000	67.8 mm (2.7 in)
2001	56.4 mm (2.2 in)
2002	38.6 mm (1.5 in)
2003	23.4 mm (0.9 in)
2004	78.0 mm (3.1 in)
2005	47.0 mm (1.9 in)
2006	96.5 mm (3.8 in)
2007	33.8 mm (1.3 in)
2008	45.7 mm (1.8 in)
2009	35.6 mm (1.4 in)
2010	25.7 mm (1.0 in)
2011	41.1 mm (1.6 in)
2012	63.5 mm (2.5 in)
2013	57.2 mm (2.3 in)
2014	48.0 mm (1.9 in)
2015	60.5 mm (2.4 in)
2016	30.7 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Oglala 1S, 1948 to 2016. The record is 101.4 mm (4.0 in) in 2015, marked on the chart; the median year is 66.0 mm (2.6 in).

Wettest five days (Rx5day) at Oglala 1S by year
Year	Wettest five days (Rx5day)
1948	37.9 mm (1.5 in)
1949	27.7 mm (1.1 in)
1950	54.2 mm (2.1 in)
1951	39.7 mm (1.6 in)
1998	2.9 mm (0.11 in)
1999	77.0 mm (3.0 in)
2000	73.4 mm (2.9 in)
2001	80.7 mm (3.2 in)
2002	69.3 mm (2.7 in)
2003	30.7 mm (1.2 in)
2004	95.2 mm (3.7 in)
2005	59.5 mm (2.3 in)
2006	96.5 mm (3.8 in)
2007	43.4 mm (1.7 in)
2008	78.7 mm (3.1 in)
2009	39.4 mm (1.6 in)
2010	65.8 mm (2.6 in)
2011	66.0 mm (2.6 in)
2012	66.5 mm (2.6 in)
2013	69.4 mm (2.7 in)
2014	83.1 mm (3.3 in)
2015	101.4 mm (4.0 in)
2016	64.8 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Oglala 1S, 1948 to 2016. The record is 44 days in 2003, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Oglala 1S by year
Year	Longest dry spell (CDD)
1948	28 days
1949	38 days
1950	34 days
1951	22 days
1998	19 days
1999	24 days
2000	20 days
2001	31 days
2002	37 days
2003	44 days
2004	22 days
2005	35 days
2006	43 days
2007	33 days
2008	21 days
2009	25 days
2010	28 days
2011	32 days
2012	37 days
2013	24 days
2014	31 days
2015	36 days
2016	44 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 Oglala 1S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Oglala 1S 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.

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