Walhalla 1 SW Weather Records (USC00329155)

Record envelope, standing records and threshold days for Walhalla 1 SW (USC00329155), North Dakota, United States, with 95 years of record.

Key Facts for Walhalla 1 SW

Walhalla 1 SW (USC00329155) is a weather station in North Dakota, United States at 48.91 latitude and -97.92 longitude, 287 m (940 ft) above sea level.
The station reports from 1904 to 1998, 95 years of record.
1,464 records set at Walhalla 1 SW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Walhalla 1 SW set a daily record precipitation of 26.7 mm (1.1 in) on 27 August 1998.

About the Station

Location: North Dakota, United States, 48.91 latitude, -97.92 longitude.
Elevation: 287 m (940 ft).
Period of record: 1904 to 1998, 95 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 Walhalla 1 SW. 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 Walhalla 1 SW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	11.1 C (52.0 F)	-41.7 C (-43.1 F)	n/a	n/a
Feb	13.3 C (55.9 F)	-40.0 C (-40.0 F)	n/a	n/a
Mar	20.0 C (68.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	-20.6 C (-5.1 F)	n/a	n/a
May	37.2 C (99.0 F)	-10.6 C (12.9 F)	n/a	n/a
Jun	38.3 C (100.9 F)	-3.9 C (25.0 F)	n/a	n/a
Jul	40.0 C (104.0 F)	1.7 C (35.1 F)	n/a	n/a
Aug	38.3 C (100.9 F)	-2.8 C (27.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	-6.1 C (21.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-20.0 C (-4.0 F)	n/a	n/a
Nov	22.2 C (72.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-37.2 C (-35.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Walhalla 1 SW still stand. 1919 holds the most, with 137.

Standing records at Walhalla 1 SW by the year they were set
Year set	Standing records
1904	73
1905	128
1906	68
1907	60
1908	76
1909	32
1910	46
1911	30
1912	68
1913	25
1914	60
1915	74
1916	80
1917	109
1918	91
1919	137
1920	56
1921	56
1922	77
1923	86
1964	19
1965	6
1968	6
1977	1

Wettest Day of Each Month

Jul: 127.3 mm (5.0 in)

The wettest day on record for each calendar month at Walhalla 1 SW. The most was 127.3 mm (5.0 in) on 2 July 1904.

Record daily precipitation for each month at Walhalla 1 SW
Month	Record daily precipitation (mm)	Date
Jan	30.5 mm (1.2 in)	19 January 1914
Feb	25.4 mm (1.0 in)	26 February 1998
Mar	48.5 mm (1.9 in)	14 March 1971
Apr	66.0 mm (2.6 in)	24 April 1953
May	54.4 mm (2.1 in)	10 May 1905
Jun	104.1 mm (4.1 in)	4 June 1904
Jul	127.3 mm (5.0 in)	2 July 1904
Aug	112.3 mm (4.4 in)	19 August 1995
Sep	92.2 mm (3.6 in)	4 September 1910
Oct	52.8 mm (2.1 in)	7 October 1994
Nov	63.5 mm (2.5 in)	8 November 1986
Dec	40.6 mm (1.6 in)	1 December 1914

Period of Record Coverage

1904 to 1977

24 years of record at Walhalla 1 SW, 1904 to 1977. 22 years have data for under 90 percent of days and are left out of rankings: 1904, 1905, 1906, 1907, 1908, 1909, 1910, 1911 and others.

Days with data per year at Walhalla 1 SW
Year	Days with data	Share of year	Complete
1904	231	63%	No
1905	313	86%	No
1906	257	70%	No
1907	159	44%	No
1908	232	63%	No
1909	129	35%	No
1910	96	26%	No
1911	135	37%	No
1912	270	74%	No
1913	148	41%	No
1914	136	37%	No
1915	308	84%	No
1916	308	84%	No
1917	324	89%	No
1918	353	97%	Yes
1919	359	98%	Yes
1920	205	56%	No
1921	242	66%	No
1922	315	86%	No
1923	318	87%	No
1964	52	14%	No
1965	31	8%	No
1968	30	8%	No
1977	1	0%	No

Latest Records

Latest records at Walhalla 1 SW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 August 1998	Walhalla 1 SW, US	daily rain	26.7 mm (1.1 in)	0.5 mm (0.02 in)	28 years	17 of 100 (Routine)
15 May 1998	Walhalla 1 SW, US	daily rain	38.6 mm (1.5 in)	12.9 mm (0.5 in)	43 years	34 of 100 (Routine)
28 February 1998	Walhalla 1 SW, US	daily rain	22.9 mm (0.9 in)	12.7 mm (0.5 in)	28 years	20 of 100 (Routine)
26 February 1998	Walhalla 1 SW, US	monthly rain	25.4 mm (1.0 in)	2.5 mm (0.10 in)	75 years	46 of 100 (Notable)
22 January 1998	Walhalla 1 SW, US	daily rain	9.1 mm (0.36 in)	5.3 mm (0.21 in)	46 years	20 of 100 (Routine)
16 August 1997	Walhalla 1 SW, US	daily rain	21.6 mm (0.9 in)	13.5 mm (0.5 in)	79 years	20 of 100 (Routine)
14 July 1997	Walhalla 1 SW, US	daily rain	112.3 mm (4.4 in)	92.0 mm (3.6 in)	27 years	57 of 100 (Notable)
7 April 1997	Walhalla 1 SW, US	daily rain	30.5 mm (1.2 in)	28.7 mm (1.1 in)	34 years	52 of 100 (Notable)
25 March 1997	Walhalla 1 SW, US	daily rain	10.2 mm (0.4 in)	5.6 mm (0.22 in)	75 years	20 of 100 (Routine)
10 January 1997	Walhalla 1 SW, US	daily rain	6.9 mm (0.27 in)	2.8 mm (0.11 in)	74 years	20 of 100 (Routine)
12 December 1996	Walhalla 1 SW, US	daily rain (Tie)	8.9 mm (0.35 in)	tie	31 years	4 of 100 (Routine)
7 November 1996	Walhalla 1 SW, US	daily rain	14.0 mm (0.6 in)	6.4 mm (0.25 in)	39 years	20 of 100 (Routine)
27 October 1996	Walhalla 1 SW, US	daily rain	19.6 mm (0.8 in)	1.6 mm (0.06 in)	24 years	17 of 100 (Routine)
27 September 1996	Walhalla 1 SW, US	daily rain	22.4 mm (0.9 in)	11.7 mm (0.5 in)	46 years	20 of 100 (Routine)
18 July 1996	Walhalla 1 SW, US	daily rain	34.3 mm (1.4 in)	19.6 mm (0.8 in)	18 years	28 of 100 (Routine)
29 June 1996	Walhalla 1 SW, US	daily rain	50.8 mm (2.0 in)	39.9 mm (1.6 in)	32 years	54 of 100 (Notable)
30 March 1996	Walhalla 1 SW, US	daily rain	21.6 mm (0.9 in)	4.1 mm (0.16 in)	7 years	17 of 100 (Routine)
17 November 1995	Walhalla 1 SW, US	daily rain	20.3 mm (0.8 in)	10.1 mm (0.4 in)	40 years	20 of 100 (Routine)
2 November 1995	Walhalla 1 SW, US	daily rain	23.9 mm (0.9 in)	11.5 mm (0.5 in)	38 years	20 of 100 (Routine)
20 October 1995	Walhalla 1 SW, US	daily rain	6.9 mm (0.27 in)	0.3 mm (0.01 in)	1 year	9 of 100 (Routine)

Extremes by Year

1904 to 1998

Yearly extremes at Walhalla 1 SW: 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)	1906	37.0 C (98.5 F)	24
Coldest night (TNn)	-41.7 C (-43.1 F)	1918	-35.6 C (-32.1 F)	24
Wettest day (Rx1day)	127.3 mm (5.0 in)	1904	43.8 mm (1.7 in)	72
Wettest five days (Rx5day)	133.4 mm (5.3 in)	1904	63.8 mm (2.5 in)	72
Longest dry spell (CDD)	80 days	1952	30 days	72

Hottest day (TXx)

The hottest day of the year at Walhalla 1 SW, 1904 to 1998. The record is 40.0 C (104.0 F) in 1906, marked on the chart; the median year is 37.0 C (98.5 F).

Hottest day (TXx) at Walhalla 1 SW by year
Year	Hottest day (TXx)
1904	32.8 C (91.0 F)
1905	37.8 C (100.0 F)
1906	40.0 C (104.0 F)
1907	12.8 C (55.0 F)
1908	37.2 C (99.0 F)
1909	37.2 C (99.0 F)
1910	38.3 C (100.9 F)
1911	32.2 C (90.0 F)
1912	38.3 C (100.9 F)
1913	34.4 C (93.9 F)
1914	35.6 C (96.1 F)
1915	37.2 C (99.0 F)
1916	36.1 C (97.0 F)
1917	40.0 C (104.0 F)
1918	36.7 C (98.1 F)
1919	38.3 C (100.9 F)
1920	37.2 C (99.0 F)
1921	38.9 C (102.0 F)
1922	36.1 C (97.0 F)
1923	38.3 C (100.9 F)
1926	n/a
1927	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	35.0 C (95.0 F)
1965	31.1 C (88.0 F)
1966	n/a
1967	n/a
1968	28.3 C (82.9 F)
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1976	n/a
1977	7.2 C (45.0 F)
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a

Coldest night (TNn)

The coldest night of the year at Walhalla 1 SW, 1904 to 1998. The record is -41.7 C (-43.1 F) in 1918, marked on the chart; the median year is -35.6 C (-32.1 F).

Coldest night (TNn) at Walhalla 1 SW by year
Year	Coldest night (TNn)
1904	-35.6 C (-32.1 F)
1905	-40.0 C (-40.0 F)
1906	-31.7 C (-25.1 F)
1907	-38.9 C (-38.0 F)
1908	-40.6 C (-41.1 F)
1909	-32.8 C (-27.0 F)
1910	-37.8 C (-36.0 F)
1911	-33.3 C (-27.9 F)
1912	-38.3 C (-36.9 F)
1913	-33.9 C (-29.0 F)
1914	-35.0 C (-31.0 F)
1915	-38.9 C (-38.0 F)
1916	-39.4 C (-38.9 F)
1917	-38.3 C (-36.9 F)
1918	-41.7 C (-43.1 F)
1919	-37.2 C (-35.0 F)
1920	-38.3 C (-36.9 F)
1921	-33.9 C (-29.0 F)
1922	-35.0 C (-31.0 F)
1923	-35.6 C (-32.1 F)
1926	n/a
1927	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	-17.8 C (0.0 F)
1965	8.9 C (48.0 F)
1966	n/a
1967	n/a
1968	-6.7 C (19.9 F)
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1976	n/a
1977	-22.2 C (-8.0 F)
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a

Wettest day (Rx1day)

The wettest day of the year at Walhalla 1 SW, 1904 to 1998. The record is 127.3 mm (5.0 in) in 1904, marked on the chart; the median year is 43.8 mm (1.7 in).

Wettest day (Rx1day) at Walhalla 1 SW by year
Year	Wettest day (Rx1day)
1904	127.3 mm (5.0 in)
1905	63.2 mm (2.5 in)
1906	41.9 mm (1.6 in)
1907	3.8 mm (0.15 in)
1908	51.6 mm (2.0 in)
1909	44.5 mm (1.8 in)
1910	92.2 mm (3.6 in)
1911	43.7 mm (1.7 in)
1912	57.2 mm (2.3 in)
1913	38.1 mm (1.5 in)
1914	42.7 mm (1.7 in)
1915	45.2 mm (1.8 in)
1916	56.4 mm (2.2 in)
1917	21.3 mm (0.8 in)
1918	48.5 mm (1.9 in)
1919	22.9 mm (0.9 in)
1920	46.0 mm (1.8 in)
1921	35.6 mm (1.4 in)
1922	35.3 mm (1.4 in)
1923	32.0 mm (1.3 in)
1926	27.7 mm (1.1 in)
1927	6.4 mm (0.25 in)
1948	12.2 mm (0.5 in)
1949	8.9 mm (0.35 in)
1950	46.5 mm (1.8 in)
1951	43.2 mm (1.7 in)
1952	52.1 mm (2.1 in)
1953	66.0 mm (2.6 in)
1954	51.3 mm (2.0 in)
1955	82.0 mm (3.2 in)
1956	67.8 mm (2.7 in)
1957	50.8 mm (2.0 in)
1958	58.4 mm (2.3 in)
1959	36.1 mm (1.4 in)
1960	32.5 mm (1.3 in)
1961	32.3 mm (1.3 in)
1962	40.6 mm (1.6 in)
1963	82.0 mm (3.2 in)
1964	61.5 mm (2.4 in)
1965	29.7 mm (1.2 in)
1966	67.6 mm (2.7 in)
1967	50.0 mm (2.0 in)
1968	43.7 mm (1.7 in)
1969	35.6 mm (1.4 in)
1970	63.2 mm (2.5 in)
1971	48.5 mm (1.9 in)
1972	33.0 mm (1.3 in)
1973	36.6 mm (1.4 in)
1974	27.7 mm (1.1 in)
1976	54.1 mm (2.1 in)
1977	51.1 mm (2.0 in)
1978	64.3 mm (2.5 in)
1979	48.3 mm (1.9 in)
1980	38.9 mm (1.5 in)
1981	37.8 mm (1.5 in)
1982	84.3 mm (3.3 in)
1983	34.3 mm (1.4 in)
1984	25.4 mm (1.0 in)
1985	50.8 mm (2.0 in)
1986	69.9 mm (2.8 in)
1987	43.9 mm (1.7 in)
1988	23.6 mm (0.9 in)
1989	29.2 mm (1.1 in)
1990	43.2 mm (1.7 in)
1991	36.8 mm (1.4 in)
1992	30.5 mm (1.2 in)
1993	43.4 mm (1.7 in)
1994	52.8 mm (2.1 in)
1995	112.3 mm (4.4 in)
1996	50.8 mm (2.0 in)
1997	112.3 mm (4.4 in)
1998	38.6 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Walhalla 1 SW, 1904 to 1998. The record is 133.4 mm (5.3 in) in 1904, marked on the chart; the median year is 63.8 mm (2.5 in).

Wettest five days (Rx5day) at Walhalla 1 SW by year
Year	Wettest five days (Rx5day)
1904	133.4 mm (5.3 in)
1905	98.0 mm (3.9 in)
1906	74.9 mm (2.9 in)
1907	3.8 mm (0.15 in)
1908	55.7 mm (2.2 in)
1909	44.5 mm (1.8 in)
1910	113.8 mm (4.5 in)
1911	44.0 mm (1.7 in)
1912	109.5 mm (4.3 in)
1913	40.9 mm (1.6 in)
1914	42.7 mm (1.7 in)
1915	47.7 mm (1.9 in)
1916	64.5 mm (2.5 in)
1917	34.0 mm (1.3 in)
1918	62.1 mm (2.4 in)
1919	35.6 mm (1.4 in)
1920	62.7 mm (2.5 in)
1921	62.0 mm (2.4 in)
1922	76.8 mm (3.0 in)
1923	36.1 mm (1.4 in)
1926	57.4 mm (2.3 in)
1927	16.6 mm (0.7 in)
1948	24.7 mm (1.0 in)
1949	11.4 mm (0.4 in)
1950	73.0 mm (2.9 in)
1951	58.7 mm (2.3 in)
1952	55.9 mm (2.2 in)
1953	66.0 mm (2.6 in)
1954	72.4 mm (2.9 in)
1955	101.6 mm (4.0 in)
1956	71.4 mm (2.8 in)
1957	67.8 mm (2.7 in)
1958	85.3 mm (3.4 in)
1959	53.1 mm (2.1 in)
1960	56.4 mm (2.2 in)
1961	54.1 mm (2.1 in)
1962	63.0 mm (2.5 in)
1963	101.3 mm (4.0 in)
1964	77.5 mm (3.1 in)
1965	50.3 mm (2.0 in)
1966	80.3 mm (3.2 in)
1967	62.2 mm (2.4 in)
1968	57.7 mm (2.3 in)
1969	77.0 mm (3.0 in)
1970	91.6 mm (3.6 in)
1971	66.3 mm (2.6 in)
1972	35.3 mm (1.4 in)
1973	67.2 mm (2.6 in)
1974	46.8 mm (1.8 in)
1976	65.1 mm (2.6 in)
1977	82.4 mm (3.2 in)
1978	87.7 mm (3.5 in)
1979	51.9 mm (2.0 in)
1980	71.9 mm (2.8 in)
1981	51.1 mm (2.0 in)
1982	84.3 mm (3.3 in)
1983	35.8 mm (1.4 in)
1984	50.8 mm (2.0 in)
1985	64.6 mm (2.5 in)
1986	79.8 mm (3.1 in)
1987	70.9 mm (2.8 in)
1988	40.7 mm (1.6 in)
1989	33.0 mm (1.3 in)
1990	68.3 mm (2.7 in)
1991	49.8 mm (2.0 in)
1992	46.7 mm (1.8 in)
1993	98.8 mm (3.9 in)
1994	69.1 mm (2.7 in)
1995	112.3 mm (4.4 in)
1996	64.8 mm (2.6 in)
1997	126.3 mm (5.0 in)
1998	71.9 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Walhalla 1 SW, 1904 to 1998. The record is 80 days in 1952, marked on the chart; the median year is 30 days.

Longest dry spell (CDD) at Walhalla 1 SW by year
Year	Longest dry spell (CDD)
1904	39 days
1905	54 days
1906	38 days
1907	61 days
1908	37 days
1909	24 days
1910	28 days
1911	20 days
1912	32 days
1913	35 days
1914	30 days
1915	44 days
1916	35 days
1917	41 days
1918	36 days
1919	30 days
1920	19 days
1921	19 days
1922	33 days
1923	12 days
1926	31 days
1927	26 days
1948	46 days
1949	10 days
1950	17 days
1951	25 days
1952	80 days
1953	28 days
1954	32 days
1955	21 days
1956	41 days
1957	34 days
1958	24 days
1959	23 days
1960	22 days
1961	40 days
1962	21 days
1963	34 days
1964	40 days
1965	37 days
1966	42 days
1967	36 days
1968	34 days
1969	38 days
1970	20 days
1971	32 days
1972	26 days
1973	70 days
1974	21 days
1976	20 days
1977	28 days
1978	28 days
1979	27 days
1980	73 days
1981	27 days
1982	27 days
1983	24 days
1984	26 days
1985	19 days
1986	38 days
1987	61 days
1988	43 days
1989	29 days
1990	25 days
1991	31 days
1992	32 days
1993	37 days
1994	26 days
1995	29 days
1996	25 days
1997	30 days
1998	25 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

42 years, 1914 to 1997

A day with at least 45.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 125.1 mm (4.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Walhalla 1 SW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	45.8 mm (1.8 in)
5 years	63.7 mm (2.5 in)
10 years	76.9 mm (3.0 in)
25 years	94.9 mm (3.7 in)
50 years	109.5 mm (4.3 in)	Longer than the 42 years of record
100 years	125.1 mm (4.9 in)	Longer than the 42 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, 42 years of values from 1914 to 1997.

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: 112.3 mm (4.4 in) in 1995; 112.3 mm (4.4 in) in 1997; 84.3 mm (3.3 in) in 1982.

Download the Data

Data for Walhalla 1 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Walhalla 1 SW 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 2026-10-13 (13 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).