Rochford 2 WNW Weather Records (USC00397227)

Record envelope, standing records and threshold days for Rochford 2 WNW (USC00397227), South Dakota, United States, with 109 years of record.

Key Facts for Rochford 2 WNW

Rochford 2 WNW (USC00397227) is a weather station in South Dakota, United States at 44.13 latitude and -103.75 longitude, 1,661 m (5,450 ft) above sea level.
The station reports from 1897 to 2005, 109 years of record.
1,464 records set at Rochford 2 WNW still stand.
Records are tracked for prcp, snow: an element needs 30 years of data to be eligible.
Rochford 2 WNW set a daily record snowfall of 10.2 cm (4.0 in) on 28 April 2005.

About the Station

Location: South Dakota, United States, 44.13 latitude, -103.75 longitude.
Elevation: 1,661 m (5,450 ft).
Period of record: 1897 to 2005, 109 years.
Eligible elements: prcp, snow.

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 Rochford 2 WNW. 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 Rochford 2 WNW, 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)	-37.8 C (-36.0 F)	n/a	n/a
Feb	17.2 C (63.0 F)	-43.3 C (-45.9 F)	n/a	n/a
Mar	22.8 C (73.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Apr	28.3 C (82.9 F)	-26.1 C (-15.0 F)	n/a	n/a
May	30.0 C (86.0 F)	-16.1 C (3.0 F)	n/a	n/a
Jun	36.1 C (97.0 F)	-5.0 C (23.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	-3.9 C (25.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	-5.6 C (21.9 F)	n/a	n/a
Sep	34.4 C (93.9 F)	-11.7 C (10.9 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-27.8 C (-18.0 F)	n/a	n/a
Nov	23.3 C (73.9 F)	-30.0 C (-22.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-51.1 C (-60.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rochford 2 WNW still stand. 1898 holds the most, with 107.

Standing records at Rochford 2 WNW by the year they were set
Year set	Standing records
1897	24
1898	107
1899	91
1900	58
1901	89
1902	48
1989	20
1990	79
1991	59
1992	84
1993	69
1994	62
1995	81
1996	94
1997	81
1998	52
1999	58
2000	81
2001	56
2002	62
2003	59
2004	36
2005	14

Wettest Day of Each Month

Nov: 86.1 mm (3.4 in)

The wettest day on record for each calendar month at Rochford 2 WNW. The most was 86.1 mm (3.4 in) on 5 November 1922.

Record daily precipitation for each month at Rochford 2 WNW
Month	Record daily precipitation (mm)	Date
Jan	35.6 mm (1.4 in)	22 January 1899
Feb	23.1 mm (0.9 in)	3 February 1924
Mar	20.8 mm (0.8 in)	17 March 2003
Apr	56.1 mm (2.2 in)	18 April 2000
May	65.0 mm (2.6 in)	15 May 1925
Jun	56.9 mm (2.2 in)	23 June 2000
Jul	55.9 mm (2.2 in)	6 July 1996
Aug	57.7 mm (2.3 in)	12 August 1915
Sep	47.5 mm (1.9 in)	16 September 1913
Oct	51.3 mm (2.0 in)	7 October 1994
Nov	86.1 mm (3.4 in)	5 November 1922
Dec	25.4 mm (1.0 in)	15 December 2000

Period of Record Coverage

1897 to 2005

23 years of record at Rochford 2 WNW, 1897 to 2005. 8 years have data for under 90 percent of days and are left out of rankings: 1897, 1900, 1902, 1989, 1990, 1998, 2004, 2005.

Days with data per year at Rochford 2 WNW
Year	Days with data	Share of year	Complete
1897	89	24%	No
1898	360	99%	Yes
1899	362	99%	Yes
1900	213	58%	No
1901	347	95%	Yes
1902	208	57%	No
1989	53	15%	No
1990	318	87%	No
1991	338	93%	Yes
1992	353	96%	Yes
1993	344	94%	Yes
1994	357	98%	Yes
1995	331	91%	Yes
1996	357	98%	Yes
1997	361	99%	Yes
1998	326	89%	No
1999	331	91%	Yes
2000	350	96%	Yes
2001	341	93%	Yes
2002	351	96%	Yes
2003	333	91%	Yes
2004	234	64%	No
2005	65	18%	No

Latest Records

Latest records at Rochford 2 WNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 April 2005	Rochford 2 WNW, US	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	72 years	34 of 100 (Routine)
13 October 2004	Rochford 2 WNW, US	daily rain	4.8 mm (0.19 in)	1.8 mm (0.07 in)	104 years	20 of 100 (Routine)
29 February 2004	Rochford 2 WNW, US	daily rain	15.7 mm (0.6 in)	4.3 mm (0.17 in)	88 years	20 of 100 (Routine)
29 February 2004	Rochford 2 WNW, US	daily snowfall	17.8 cm (7.0 in)	1.3 cm (0.5 in)	88 years	38 of 100 (Notable)
7 January 2004	Rochford 2 WNW, US	daily rain	6.9 mm (0.27 in)	3.1 mm (0.12 in)	92 years	20 of 100 (Routine)
7 January 2004	Rochford 2 WNW, US	daily snowfall	6.9 cm (2.7 in)	1.3 cm (0.5 in)	66 years	32 of 100 (Routine)
28 December 2003	Rochford 2 WNW, US	daily snowfall	15.2 cm (6.0 in)	8.8 cm (3.5 in)	76 years	52 of 100 (Notable)
28 December 2003	Rochford 2 WNW, US	daily rain	7.6 mm (0.30 in)	1.2 mm (0.05 in)	76 years	20 of 100 (Routine)
21 November 2003	Rochford 2 WNW, US	daily snowfall	30.5 cm (12.0 in)	22.9 cm (9.0 in)	68 years	64 of 100 (Major)
21 November 2003	Rochford 2 WNW, US	daily rain	11.4 mm (0.4 in)	6.3 mm (0.25 in)	104 years	20 of 100 (Routine)
17 September 2003	Rochford 2 WNW, US	daily snowfall	8.9 cm (3.5 in)	8.9 cm (3.5 in)	104 years	57 of 100 (Notable)
12 September 2003	Rochford 2 WNW, US	daily rain	7.6 mm (0.30 in)	2.8 mm (0.11 in)	53 years	20 of 100 (Routine)
10 September 2003	Rochford 2 WNW, US	daily rain	27.4 mm (1.1 in)	4.0 mm (0.16 in)	90 years	42 of 100 (Notable)
1 May 2003	Rochford 2 WNW, US	monthly snowfall (Tie)	25.4 cm (10.0 in)	tie	5 years	5 of 100 (Routine)
30 April 2003	Rochford 2 WNW, US	daily rain	31.2 mm (1.2 in)	13.9 mm (0.5 in)	66 years	50 of 100 (Notable)
30 April 2003	Rochford 2 WNW, US	daily snowfall	8.9 cm (3.5 in)	1.3 cm (0.5 in)	9 years	13 of 100 (Routine)
4 April 2003	Rochford 2 WNW, US	daily snowfall	12.7 cm (5.0 in)	1.8 cm (0.7 in)	68 years	32 of 100 (Routine)
17 March 2003	Rochford 2 WNW, US	daily snowfall	11.4 cm (4.5 in)	6.3 cm (2.5 in)	10 years	25 of 100 (Routine)
17 March 2003	Rochford 2 WNW, US	monthly rain	20.8 mm (0.8 in)	0.7 mm (0.03 in)	4 years	20 of 100 (Routine)
15 January 2003	Rochford 2 WNW, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	87 years	9 of 100 (Routine)

Climate Trend

10 complete years, 1898 to 2003

One stripe for each of 10 complete years at Rochford 2 WNW, 1898 to 2003. Blue stripes are years cooler than the station's own mean of 3.5 C (38.2 F); red stripes are warmer. The coolest year was 1993, at 1.6 C (34.8 F), and the warmest was 2001, at 4.7 C (40.4 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Rochford 2 WNW as warming stripes, 1898 to 2003
Year	Annual mean temperature	Difference from the station mean
1898	4.5 C	+1.07 C
1899	4.0 C	+0.59 C
1992	3.1 C	-0.39 C
1993	1.6 C	-1.89 C
1994	3.1 C	-0.34 C
1996	2.4 C	-1.08 C
1997	3.2 C	-0.23 C
2001	4.7 C	+1.22 C
2002	3.7 C	+0.24 C
2003	4.3 C	+0.83 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

1897 to 2005

Yearly extremes at Rochford 2 WNW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1900	33.9 C (93.0 F)	23
Coldest night (TNn)	-51.1 C (-60.0 F)	1989	-35.6 C (-32.1 F)	23
Wettest day (Rx1day)	86.1 mm (3.4 in)	1922	36.1 mm (1.4 in)	59
Wettest five days (Rx5day)	120.7 mm (4.8 in)	1998	59.0 mm (2.3 in)	59
Longest dry spell (CDD)	44 days	1921	28 days	59

Hottest day (TXx)

The hottest day of the year at Rochford 2 WNW, 1897 to 2005. The record is 40.0 C (104.0 F) in 1900, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Rochford 2 WNW by year
Year	Hottest day (TXx)
1897	25.6 C (78.1 F)
1898	33.9 C (93.0 F)
1899	34.4 C (93.9 F)
1900	40.0 C (104.0 F)
1901	36.7 C (98.1 F)
1902	35.0 C (95.0 F)
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1989	18.9 C (66.0 F)
1990	36.1 C (97.0 F)
1991	31.1 C (88.0 F)
1992	31.1 C (88.0 F)
1993	30.6 C (87.1 F)
1994	31.7 C (89.1 F)
1995	35.0 C (95.0 F)
1996	33.3 C (91.9 F)
1997	31.7 C (89.1 F)
1998	34.4 C (93.9 F)
1999	34.4 C (93.9 F)
2000	33.9 C (93.0 F)
2001	35.0 C (95.0 F)
2002	36.1 C (97.0 F)
2003	35.6 C (96.1 F)
2004	27.2 C (81.0 F)
2005	20.0 C (68.0 F)

Coldest night (TNn)

The coldest night of the year at Rochford 2 WNW, 1897 to 2005. The record is -51.1 C (-60.0 F) in 1989, marked on the chart; the median year is -35.6 C (-32.1 F).

Coldest night (TNn) at Rochford 2 WNW by year
Year	Coldest night (TNn)
1897	-28.9 C (-20.0 F)
1898	-32.2 C (-26.0 F)
1899	-41.1 C (-42.0 F)
1900	-24.4 C (-11.9 F)
1901	-37.2 C (-35.0 F)
1902	-32.2 C (-26.0 F)
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1989	-51.1 C (-60.0 F)
1990	-43.9 C (-47.0 F)
1991	-36.7 C (-34.1 F)
1992	-35.6 C (-32.1 F)
1993	-37.2 C (-35.0 F)
1994	-41.1 C (-42.0 F)
1995	-33.9 C (-29.0 F)
1996	-43.3 C (-45.9 F)
1997	-37.8 C (-36.0 F)
1998	-37.8 C (-36.0 F)
1999	-27.2 C (-17.0 F)
2000	-32.2 C (-26.0 F)
2001	-38.3 C (-36.9 F)
2002	-30.6 C (-23.1 F)
2003	-33.9 C (-29.0 F)
2004	-31.7 C (-25.1 F)
2005	-28.9 C (-20.0 F)

Wettest day (Rx1day)

The wettest day of the year at Rochford 2 WNW, 1897 to 2005. The record is 86.1 mm (3.4 in) in 1922, marked on the chart; the median year is 36.1 mm (1.4 in).

Wettest day (Rx1day) at Rochford 2 WNW by year
Year	Wettest day (Rx1day)
1897	14.0 mm (0.6 in)
1898	39.4 mm (1.6 in)
1899	60.5 mm (2.4 in)
1900	35.6 mm (1.4 in)
1901	42.4 mm (1.7 in)
1902	27.9 mm (1.1 in)
1909	12.4 mm (0.5 in)
1910	23.4 mm (0.9 in)
1911	28.7 mm (1.1 in)
1912	25.4 mm (1.0 in)
1913	47.5 mm (1.9 in)
1914	31.0 mm (1.2 in)
1915	57.7 mm (2.3 in)
1916	20.3 mm (0.8 in)
1917	28.2 mm (1.1 in)
1918	53.3 mm (2.1 in)
1919	34.3 mm (1.4 in)
1920	35.6 mm (1.4 in)
1921	25.7 mm (1.0 in)
1922	86.1 mm (3.4 in)
1923	40.6 mm (1.6 in)
1924	38.6 mm (1.5 in)
1925	65.0 mm (2.6 in)
1926	36.1 mm (1.4 in)
1927	41.7 mm (1.6 in)
1928	46.7 mm (1.8 in)
1929	55.1 mm (2.2 in)
1930	42.9 mm (1.7 in)
1931	19.8 mm (0.8 in)
1932	45.7 mm (1.8 in)
1933	54.6 mm (2.1 in)
1934	24.6 mm (1.0 in)
1935	37.3 mm (1.5 in)
1936	23.6 mm (0.9 in)
1937	48.5 mm (1.9 in)
1938	31.2 mm (1.2 in)
1939	41.1 mm (1.6 in)
1940	19.6 mm (0.8 in)
1948	22.6 mm (0.9 in)
1949	22.1 mm (0.9 in)
1950	30.2 mm (1.2 in)
1951	26.9 mm (1.1 in)
1989	11.9 mm (0.5 in)
1990	35.1 mm (1.4 in)
1991	41.4 mm (1.6 in)
1992	25.9 mm (1.0 in)
1993	45.5 mm (1.8 in)
1994	51.3 mm (2.0 in)
1995	47.5 mm (1.9 in)
1996	55.9 mm (2.2 in)
1997	56.1 mm (2.2 in)
1998	55.9 mm (2.2 in)
1999	42.7 mm (1.7 in)
2000	56.9 mm (2.2 in)
2001	24.1 mm (0.9 in)
2002	42.9 mm (1.7 in)
2003	31.2 mm (1.2 in)
2004	15.7 mm (0.6 in)
2005	7.6 mm (0.30 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rochford 2 WNW, 1897 to 2005. The record is 120.7 mm (4.8 in) in 1998, marked on the chart; the median year is 59.0 mm (2.3 in).

Wettest five days (Rx5day) at Rochford 2 WNW by year
Year	Wettest five days (Rx5day)
1897	23.2 mm (0.9 in)
1898	63.3 mm (2.5 in)
1899	113.9 mm (4.5 in)
1900	59.0 mm (2.3 in)
1901	62.7 mm (2.5 in)
1902	50.3 mm (2.0 in)
1909	22.1 mm (0.9 in)
1910	35.0 mm (1.4 in)
1911	42.7 mm (1.7 in)
1912	54.4 mm (2.1 in)
1913	53.8 mm (2.1 in)
1914	72.7 mm (2.9 in)
1915	97.3 mm (3.8 in)
1916	40.6 mm (1.6 in)
1917	48.6 mm (1.9 in)
1918	73.4 mm (2.9 in)
1919	46.5 mm (1.8 in)
1920	63.3 mm (2.5 in)
1921	50.9 mm (2.0 in)
1922	103.9 mm (4.1 in)
1923	66.3 mm (2.6 in)
1924	45.1 mm (1.8 in)
1925	77.4 mm (3.0 in)
1926	77.8 mm (3.1 in)
1927	77.2 mm (3.0 in)
1928	72.9 mm (2.9 in)
1929	79.6 mm (3.1 in)
1930	49.2 mm (1.9 in)
1931	43.1 mm (1.7 in)
1932	94.5 mm (3.7 in)
1933	81.3 mm (3.2 in)
1934	39.6 mm (1.6 in)
1935	68.8 mm (2.7 in)
1936	37.6 mm (1.5 in)
1937	61.5 mm (2.4 in)
1938	31.2 mm (1.2 in)
1939	58.4 mm (2.3 in)
1940	21.6 mm (0.9 in)
1948	22.3 mm (0.9 in)
1949	22.1 mm (0.9 in)
1950	44.9 mm (1.8 in)
1951	45.3 mm (1.8 in)
1989	23.3 mm (0.9 in)
1990	38.4 mm (1.5 in)
1991	60.3 mm (2.4 in)
1992	51.8 mm (2.0 in)
1993	67.6 mm (2.7 in)
1994	59.7 mm (2.4 in)
1995	89.9 mm (3.5 in)
1996	74.1 mm (2.9 in)
1997	73.7 mm (2.9 in)
1998	120.7 mm (4.8 in)
1999	67.8 mm (2.7 in)
2000	72.6 mm (2.9 in)
2001	54.8 mm (2.2 in)
2002	59.9 mm (2.4 in)
2003	70.8 mm (2.8 in)
2004	17.7 mm (0.7 in)
2005	8.6 mm (0.34 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rochford 2 WNW, 1897 to 2005. The record is 44 days in 1921, marked on the chart; the median year is 28 days.

Longest dry spell (CDD) at Rochford 2 WNW by year
Year	Longest dry spell (CDD)
1897	11 days
1898	34 days
1899	28 days
1900	18 days
1901	17 days
1902	11 days
1909	31 days
1910	31 days
1911	27 days
1912	26 days
1913	31 days
1914	35 days
1915	25 days
1916	29 days
1917	37 days
1918	22 days
1919	29 days
1920	23 days
1921	44 days
1922	31 days
1923	40 days
1924	17 days
1925	16 days
1926	15 days
1927	22 days
1928	21 days
1929	18 days
1930	34 days
1931	28 days
1932	21 days
1933	19 days
1934	27 days
1935	25 days
1936	29 days
1937	30 days
1938	28 days
1939	32 days
1940	39 days
1948	30 days
1949	31 days
1950	30 days
1951	30 days
1989	9 days
1990	37 days
1991	27 days
1992	29 days
1993	24 days
1994	16 days
1995	30 days
1996	20 days
1997	20 days
1998	37 days
1999	29 days
2000	30 days
2001	30 days
2002	27 days
2003	25 days
2004	25 days
2005	32 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.

Rainfall Return Levels

41 years, 1898 to 2003

A day with at least 38.2 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 78.9 mm (3.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Rochford 2 WNW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.2 mm (1.5 in)
5 years	50.3 mm (2.0 in)
10 years	57.8 mm (2.3 in)
25 years	66.7 mm (2.6 in)
50 years	73.0 mm (2.9 in)	Longer than the 41 years of record
100 years	78.9 mm (3.1 in)	Longer than the 41 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, 41 years of values from 1898 to 2003.

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: 86.1 mm (3.4 in) in 1922; 60.5 mm (2.4 in) in 1899; 57.7 mm (2.3 in) in 1915.

Download the Data

Data for Rochford 2 WNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rochford 2 WNW 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 2026-10-15 (15 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).