Spearfish 9 WNW Weather Records (USC00397877)

Record envelope, standing records and threshold days for Spearfish 9 WNW (USC00397877), South Dakota, United States, with 56 years of record.

Key Facts for Spearfish 9 WNW

Spearfish 9 WNW (USC00397877) is a weather station in South Dakota, United States at 44.55 latitude and -104.02 longitude, 1,046 m (3,432 ft) above sea level.
The station reports from 1909 to 1964, 56 years of record.
0 records set at Spearfish 9 WNW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Spearfish 9 WNW set a daily record precipitation of 46.5 mm (1.8 in) on 22 June 1964.

About the Station

Location: South Dakota, United States, 44.55 latitude, -104.02 longitude.
Elevation: 1,046 m (3,432 ft).
Period of record: 1909 to 1964, 56 years.
Eligible elements: prcp, snow, snwd.

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 Spearfish 9 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 Spearfish 9 WNW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

0 standing records

0 records at Spearfish 9 WNW still stand.

All-Time Record Progression

3 new records

3 all-time records were set at Spearfish 9 WNW between 27 January 1944 and 16 June 1962. Each dot is a new record.

When Spearfish 9 WNW set new all-time records
Date	Kind	Detail
1944-01-27	Record daily snowfall	Record daily snowfall 47.0 cm (18.5 in)
1949-01-04	Record daily snowfall	Record daily snowfall 85.1 cm (33.5 in)
1962-06-16	Record daily precipitation	Record daily precipitation 98.6 mm (3.9 in)

Wettest Day of Each Month

Jun: 98.6 mm (3.9 in)

The wettest day on record for each calendar month at Spearfish 9 WNW. The most was 98.6 mm (3.9 in) on 16 June 1962.

Record daily precipitation for each month at Spearfish 9 WNW
Month	Record daily precipitation (mm)	Date
Jan	36.8 mm (1.4 in)	27 January 1944
Feb	24.1 mm (0.9 in)	3 February 1924
Mar	38.6 mm (1.5 in)	13 March 1929
Apr	73.4 mm (2.9 in)	14 April 1941
May	94.5 mm (3.7 in)	11 May 1922
Jun	98.6 mm (3.9 in)	16 June 1962
Jul	76.2 mm (3.0 in)	9 July 1921
Aug	59.7 mm (2.4 in)	22 August 1957
Sep	75.4 mm (3.0 in)	16 September 1913
Oct	57.4 mm (2.3 in)	22 October 1914
Nov	44.5 mm (1.8 in)	5 November 1922
Dec	18.3 mm (0.7 in)	30 December 1922

Latest Records

Latest records at Spearfish 9 WNW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 June 1964	Spearfish 9 WNW, US	daily rain	46.5 mm (1.8 in)	34.6 mm (1.4 in)	34 years	46 of 100 (Notable)
9 June 1964	Spearfish 9 WNW, US	daily rain	44.2 mm (1.7 in)	18.8 mm (0.7 in)	7 years	24 of 100 (Routine)
8 June 1964	Spearfish 9 WNW, US	daily rain	61.7 mm (2.4 in)	9.4 mm (0.37 in)	34 years	23 of 100 (Routine)
6 May 1964	Spearfish 9 WNW, US	daily rain	18.3 mm (0.7 in)	2.8 mm (0.11 in)	26 years	14 of 100 (Routine)
10 March 1964	Spearfish 9 WNW, US	daily snow depth (Tie)	10.2 cm (4.0 in)	tie	47 years	4 of 100 (Routine)
9 March 1964	Spearfish 9 WNW, US	daily snow depth	15.2 cm (6.0 in)	2.5 cm (1.0 in)	46 years	20 of 100 (Routine)
8 March 1964	Spearfish 9 WNW, US	daily snow depth	15.2 cm (6.0 in)	2.5 cm (1.0 in)	21 years	13 of 100 (Routine)
7 March 1964	Spearfish 9 WNW, US	daily snow depth	15.2 cm (6.0 in)	5.0 cm (2.0 in)	49 years	23 of 100 (Routine)
6 March 1964	Spearfish 9 WNW, US	daily snow depth	30.5 cm (12.0 in)	15.3 cm (6.0 in)	34 years	30 of 100 (Routine)
6 March 1964	Spearfish 9 WNW, US	daily snowfall	22.9 cm (9.0 in)	6.9 cm (2.7 in)	34 years	25 of 100 (Routine)
5 March 1964	Spearfish 9 WNW, US	daily snow depth (Tie)	7.6 cm (3.0 in)	tie	11 years	2 of 100 (Routine)
20 February 1964	Spearfish 9 WNW, US	daily snowfall	15.2 cm (6.0 in)	5.0 cm (2.0 in)	44 years	28 of 100 (Routine)
23 January 1964	Spearfish 9 WNW, US	daily snowfall	6.4 cm (2.5 in)	1.3 cm (0.5 in)	13 years	10 of 100 (Routine)
23 January 1964	Spearfish 9 WNW, US	daily rain (Tie)	1.8 mm (0.07 in)	tie	34 years	3 of 100 (Routine)
30 August 1963	Spearfish 9 WNW, US	daily rain	14.0 mm (0.6 in)	1.6 mm (0.06 in)	21 years	12 of 100 (Routine)
11 June 1963	Spearfish 9 WNW, US	daily rain	29.2 mm (1.1 in)	12.7 mm (0.5 in)	36 years	26 of 100 (Routine)
22 April 1963	Spearfish 9 WNW, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	52 years	29 of 100 (Routine)
21 April 1963	Spearfish 9 WNW, US	daily snowfall	5.1 cm (2.0 in)	5.1 cm (2.0 in)	52 years	26 of 100 (Routine)
20 February 1963	Spearfish 9 WNW, US	daily rain (Tie)	4.6 mm (0.18 in)	tie	43 years	4 of 100 (Routine)
6 October 1962	Spearfish 9 WNW, US	daily rain	26.7 mm (1.1 in)	5.9 mm (0.23 in)	31 years	21 of 100 (Routine)

Extremes by Year

1909 to 1964

Yearly extremes at Spearfish 9 WNW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	98.6 mm (3.9 in)	1962	39.0 mm (1.5 in)	56
Wettest five days (Rx5day)	140.5 mm (5.5 in)	1941	62.4 mm (2.5 in)	56
Longest dry spell (CDD)	70 days	1922	31 days	56

Wettest day (Rx1day)

The wettest day of the year at Spearfish 9 WNW, 1909 to 1964. The record is 98.6 mm (3.9 in) in 1962, marked on the chart; the median year is 39.0 mm (1.5 in).

Wettest day (Rx1day) at Spearfish 9 WNW by year
Year	Wettest day (Rx1day)
1909	26.7 mm (1.1 in)
1910	32.5 mm (1.3 in)
1911	19.8 mm (0.8 in)
1912	71.9 mm (2.8 in)
1913	75.4 mm (3.0 in)
1914	57.4 mm (2.3 in)
1915	38.1 mm (1.5 in)
1916	36.6 mm (1.4 in)
1917	20.3 mm (0.8 in)
1918	44.7 mm (1.8 in)
1919	29.2 mm (1.1 in)
1920	32.0 mm (1.3 in)
1921	76.2 mm (3.0 in)
1922	94.5 mm (3.7 in)
1923	71.1 mm (2.8 in)
1924	43.9 mm (1.7 in)
1925	50.3 mm (2.0 in)
1926	70.1 mm (2.8 in)
1927	29.7 mm (1.2 in)
1928	50.3 mm (2.0 in)
1929	64.5 mm (2.5 in)
1930	52.3 mm (2.1 in)
1931	38.6 mm (1.5 in)
1932	68.6 mm (2.7 in)
1933	63.5 mm (2.5 in)
1934	39.4 mm (1.6 in)
1935	41.4 mm (1.6 in)
1936	38.9 mm (1.5 in)
1937	57.9 mm (2.3 in)
1938	21.1 mm (0.8 in)
1939	24.9 mm (1.0 in)
1940	58.4 mm (2.3 in)
1941	73.4 mm (2.9 in)
1942	37.6 mm (1.5 in)
1943	31.8 mm (1.3 in)
1944	43.2 mm (1.7 in)
1945	16.5 mm (0.6 in)
1946	29.7 mm (1.2 in)
1947	30.5 mm (1.2 in)
1948	39.1 mm (1.5 in)
1949	35.6 mm (1.4 in)
1950	31.8 mm (1.3 in)
1951	92.2 mm (3.6 in)
1952	49.5 mm (1.9 in)
1953	34.3 mm (1.4 in)
1954	35.3 mm (1.4 in)
1955	48.3 mm (1.9 in)
1956	34.3 mm (1.4 in)
1957	59.7 mm (2.4 in)
1958	33.8 mm (1.3 in)
1959	19.8 mm (0.8 in)
1960	33.5 mm (1.3 in)
1961	19.1 mm (0.8 in)
1962	98.6 mm (3.9 in)
1963	30.5 mm (1.2 in)
1964	61.7 mm (2.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Spearfish 9 WNW, 1909 to 1964. The record is 140.5 mm (5.5 in) in 1941, marked on the chart; the median year is 62.4 mm (2.5 in).

Wettest five days (Rx5day) at Spearfish 9 WNW by year
Year	Wettest five days (Rx5day)
1909	46.0 mm (1.8 in)
1910	53.6 mm (2.1 in)
1911	28.2 mm (1.1 in)
1912	86.9 mm (3.4 in)
1913	87.9 mm (3.5 in)
1914	64.3 mm (2.5 in)
1915	72.9 mm (2.9 in)
1916	56.1 mm (2.2 in)
1917	31.5 mm (1.2 in)
1918	70.6 mm (2.8 in)
1919	47.2 mm (1.9 in)
1920	51.3 mm (2.0 in)
1921	76.2 mm (3.0 in)
1922	122.4 mm (4.8 in)
1923	71.1 mm (2.8 in)
1924	52.8 mm (2.1 in)
1925	54.6 mm (2.1 in)
1926	70.1 mm (2.8 in)
1927	86.8 mm (3.4 in)
1928	82.3 mm (3.2 in)
1929	89.4 mm (3.5 in)
1930	60.5 mm (2.4 in)
1931	39.4 mm (1.6 in)
1932	108.0 mm (4.3 in)
1933	73.7 mm (2.9 in)
1934	50.1 mm (2.0 in)
1935	54.9 mm (2.2 in)
1936	65.5 mm (2.6 in)
1937	86.6 mm (3.4 in)
1938	37.5 mm (1.5 in)
1939	49.5 mm (1.9 in)
1940	71.6 mm (2.8 in)
1941	140.5 mm (5.5 in)
1942	88.4 mm (3.5 in)
1943	58.0 mm (2.3 in)
1944	100.1 mm (3.9 in)
1945	16.5 mm (0.6 in)
1946	57.6 mm (2.3 in)
1947	38.1 mm (1.5 in)
1948	92.4 mm (3.6 in)
1949	46.2 mm (1.8 in)
1950	36.6 mm (1.4 in)
1951	105.4 mm (4.1 in)
1952	95.2 mm (3.7 in)
1953	68.2 mm (2.7 in)
1954	50.3 mm (2.0 in)
1955	65.6 mm (2.6 in)
1956	52.9 mm (2.1 in)
1957	67.1 mm (2.6 in)
1958	40.7 mm (1.6 in)
1959	33.8 mm (1.3 in)
1960	39.4 mm (1.6 in)
1961	25.2 mm (1.0 in)
1962	120.7 mm (4.8 in)
1963	60.2 mm (2.4 in)
1964	107.0 mm (4.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Spearfish 9 WNW, 1909 to 1964. The record is 70 days in 1922, marked on the chart; the median year is 31 days.

Longest dry spell (CDD) at Spearfish 9 WNW by year
Year	Longest dry spell (CDD)
1909	32 days
1910	34 days
1911	25 days
1912	17 days
1913	31 days
1914	44 days
1915	24 days
1916	27 days
1917	37 days
1918	28 days
1919	33 days
1920	24 days
1921	41 days
1922	70 days
1923	19 days
1924	18 days
1925	21 days
1926	21 days
1927	33 days
1928	42 days
1929	26 days
1930	39 days
1931	41 days
1932	22 days
1933	43 days
1934	43 days
1935	33 days
1936	40 days
1937	24 days
1938	32 days
1939	43 days
1940	27 days
1941	23 days
1942	39 days
1943	21 days
1944	23 days
1945	11 days
1946	24 days
1947	31 days
1948	38 days
1949	33 days
1950	30 days
1951	22 days
1952	33 days
1953	47 days
1954	24 days
1955	32 days
1956	23 days
1957	46 days
1958	29 days
1959	45 days
1960	42 days
1961	31 days
1962	22 days
1963	25 days
1964	21 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

49 years, 1910 to 1963

A day with at least 42.6 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 111.3 mm (4.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Spearfish 9 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	42.6 mm (1.7 in)
5 years	60.3 mm (2.4 in)
10 years	72.3 mm (2.8 in)
25 years	87.8 mm (3.5 in)
50 years	99.5 mm (3.9 in)	Longer than the 49 years of record
100 years	111.3 mm (4.4 in)	Longer than the 49 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, 49 years of values from 1910 to 1963.

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: 98.6 mm (3.9 in) in 1962; 94.5 mm (3.7 in) in 1922; 76.2 mm (3.0 in) in 1921.

Download the Data

Data for Spearfish 9 WNW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Spearfish 9 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).

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a