Alkmaar Weather Records (SF005555670)

Record envelope, standing records and threshold days for Alkmaar (SF005555670), South Africa, with 93 years of record.

Key Facts for Alkmaar

Alkmaar (SF005555670) is a weather station in South Africa at -25.45 latitude and 30.83 longitude, 706 m (2,316 ft) above sea level.
The station reports from 1905 to 1997, 93 years of record.
0 records set at Alkmaar still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Alkmaar set a daily record precipitation of 9.4 mm (0.37 in) on 30 July 1997.

About the Station

Location: South Africa, -25.45 latitude, 30.83 longitude.
Elevation: 706 m (2,316 ft).
Period of record: 1905 to 1997, 93 years.
Eligible elements: prcp.

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 Alkmaar. 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 Alkmaar, 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 Alkmaar still stand.

Wettest Day of Each Month

Jan: 184.7 mm (7.3 in)

The wettest day on record for each calendar month at Alkmaar. The most was 184.7 mm (7.3 in) on 21 January 1909.

Record daily precipitation for each month at Alkmaar
Month	Record daily precipitation (mm)	Date
Jan	184.7 mm (7.3 in)	21 January 1909
Feb	151.5 mm (6.0 in)	7 February 1974
Mar	117.0 mm (4.6 in)	3 March 1976
Apr	81.8 mm (3.2 in)	22 April 1909
May	62.0 mm (2.4 in)	2 May 1955
Jun	56.7 mm (2.2 in)	7 June 1956
Jul	56.6 mm (2.2 in)	27 July 1927
Aug	49.8 mm (2.0 in)	20 August 1951
Sep	77.8 mm (3.1 in)	1 September 1988
Oct	84.3 mm (3.3 in)	20 October 1924
Nov	88.1 mm (3.5 in)	24 November 1947
Dec	96.0 mm (3.8 in)	18 December 1973

Latest Records

Latest records at Alkmaar
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 July 1997	Alkmaar, ZA	daily rain	9.4 mm (0.37 in)	7.2 mm (0.28 in)	7 years	18 of 100 (Routine)
27 May 1997	Alkmaar, ZA	daily rain	20.5 mm (0.8 in)	5.0 mm (0.20 in)	14 years	18 of 100 (Routine)
26 May 1997	Alkmaar, ZA	daily rain	14.4 mm (0.6 in)	8.7 mm (0.34 in)	40 years	20 of 100 (Routine)
5 March 1997	Alkmaar, ZA	daily rain	59.0 mm (2.3 in)	5.5 mm (0.22 in)	40 years	25 of 100 (Routine)
13 November 1996	Alkmaar, ZA	daily rain	59.2 mm (2.3 in)	25.2 mm (1.0 in)	5 years	31 of 100 (Routine)
3 August 1996	Alkmaar, ZA	daily rain	7.1 mm (0.28 in)	3.1 mm (0.12 in)	23 years	18 of 100 (Routine)
24 July 1996	Alkmaar, ZA	daily rain	6.7 mm (0.26 in)	2.9 mm (0.11 in)	70 years	20 of 100 (Routine)
22 July 1996	Alkmaar, ZA	daily rain	9.3 mm (0.37 in)	4.6 mm (0.18 in)	12 years	16 of 100 (Routine)
18 May 1996	Alkmaar, ZA	daily rain	25.8 mm (1.0 in)	8.5 mm (0.33 in)	46 years	32 of 100 (Routine)
15 May 1996	Alkmaar, ZA	daily rain	11.1 mm (0.4 in)	0.9 mm (0.04 in)	46 years	20 of 100 (Routine)
24 February 1996	Alkmaar, ZA	daily rain	52.1 mm (2.1 in)	10.1 mm (0.4 in)	38 years	25 of 100 (Routine)
9 February 1996	Alkmaar, ZA	daily rain	103.5 mm (4.1 in)	43.3 mm (1.7 in)	58 years	51 of 100 (Notable)
17 August 1995	Alkmaar, ZA	daily rain	16.5 mm (0.6 in)	9.2 mm (0.36 in)	16 years	20 of 100 (Routine)
16 August 1995	Alkmaar, ZA	daily rain	8.2 mm (0.32 in)	7.5 mm (0.30 in)	34 years	20 of 100 (Routine)
13 August 1995	Alkmaar, ZA	daily rain	1.9 mm (0.07 in)	0.4 mm (0.02 in)	68 years	20 of 100 (Routine)
28 April 1995	Alkmaar, ZA	daily rain	38.6 mm (1.5 in)	1.3 mm (0.05 in)	45 years	23 of 100 (Routine)
23 March 1995	Alkmaar, ZA	daily rain	76.5 mm (3.0 in)	37.9 mm (1.5 in)	8 years	39 of 100 (Notable)
14 October 1994	Alkmaar, ZA	daily rain	51.5 mm (2.0 in)	24.8 mm (1.0 in)	80 years	55 of 100 (Notable)
30 March 1994	Alkmaar, ZA	daily rain	20.3 mm (0.8 in)	1.2 mm (0.05 in)	63 years	20 of 100 (Routine)
3 January 1994	Alkmaar, ZA	daily rain	99.4 mm (3.9 in)	34.4 mm (1.4 in)	56 years	44 of 100 (Notable)

Extremes by Year

1905 to 1997

Yearly extremes at Alkmaar: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	184.7 mm (7.3 in)	1909	65.9 mm (2.6 in)	93
Wettest five days (Rx5day)	301.1 mm (11.9 in)	1909	104.5 mm (4.1 in)	93
Longest dry spell (CDD)	201 days	1946	68 days	93

Wettest day (Rx1day)

The wettest day of the year at Alkmaar, 1905 to 1997. The record is 184.7 mm (7.3 in) in 1909, marked on the chart; the median year is 65.9 mm (2.6 in).

Wettest day (Rx1day) at Alkmaar by year
Year	Wettest day (Rx1day)
1905	69.6 mm (2.7 in)
1906	58.4 mm (2.3 in)
1907	82.6 mm (3.3 in)
1908	78.7 mm (3.1 in)
1909	184.7 mm (7.3 in)
1910	64.5 mm (2.5 in)
1911	69.3 mm (2.7 in)
1912	71.1 mm (2.8 in)
1913	69.9 mm (2.8 in)
1914	33.0 mm (1.3 in)
1915	81.3 mm (3.2 in)
1916	51.6 mm (2.0 in)
1917	84.8 mm (3.3 in)
1918	118.9 mm (4.7 in)
1919	77.2 mm (3.0 in)
1920	55.9 mm (2.2 in)
1921	47.0 mm (1.9 in)
1922	41.7 mm (1.6 in)
1923	62.7 mm (2.5 in)
1924	84.3 mm (3.3 in)
1925	73.7 mm (2.9 in)
1926	53.1 mm (2.1 in)
1927	80.0 mm (3.1 in)
1928	61.0 mm (2.4 in)
1929	45.5 mm (1.8 in)
1930	79.2 mm (3.1 in)
1931	44.7 mm (1.8 in)
1932	41.4 mm (1.6 in)
1933	53.6 mm (2.1 in)
1934	49.8 mm (2.0 in)
1935	63.2 mm (2.5 in)
1936	56.1 mm (2.2 in)
1937	98.0 mm (3.9 in)
1938	76.2 mm (3.0 in)
1939	119.4 mm (4.7 in)
1940	37.6 mm (1.5 in)
1941	52.1 mm (2.1 in)
1942	61.0 mm (2.4 in)
1943	55.6 mm (2.2 in)
1944	43.4 mm (1.7 in)
1945	49.5 mm (1.9 in)
1946	77.0 mm (3.0 in)
1947	88.1 mm (3.5 in)
1948	56.9 mm (2.2 in)
1949	69.6 mm (2.7 in)
1950	47.8 mm (1.9 in)
1951	63.5 mm (2.5 in)
1952	79.8 mm (3.1 in)
1953	76.0 mm (3.0 in)
1954	70.0 mm (2.8 in)
1955	110.0 mm (4.3 in)
1956	93.0 mm (3.7 in)
1957	53.5 mm (2.1 in)
1958	121.0 mm (4.8 in)
1959	39.5 mm (1.6 in)
1960	110.0 mm (4.3 in)
1961	71.0 mm (2.8 in)
1962	64.0 mm (2.5 in)
1963	41.0 mm (1.6 in)
1964	72.0 mm (2.8 in)
1965	45.5 mm (1.8 in)
1966	87.0 mm (3.4 in)
1967	62.0 mm (2.4 in)
1968	68.0 mm (2.7 in)
1969	64.0 mm (2.5 in)
1970	39.5 mm (1.6 in)
1971	45.0 mm (1.8 in)
1972	63.5 mm (2.5 in)
1973	96.0 mm (3.8 in)
1974	151.5 mm (6.0 in)
1975	51.0 mm (2.0 in)
1976	117.0 mm (4.6 in)
1977	98.0 mm (3.9 in)
1978	40.0 mm (1.6 in)
1979	37.8 mm (1.5 in)
1980	94.8 mm (3.7 in)
1981	78.5 mm (3.1 in)
1982	65.9 mm (2.6 in)
1983	45.0 mm (1.8 in)
1984	105.0 mm (4.1 in)
1985	87.0 mm (3.4 in)
1986	54.0 mm (2.1 in)
1987	80.4 mm (3.2 in)
1988	77.8 mm (3.1 in)
1989	43.7 mm (1.7 in)
1990	57.0 mm (2.2 in)
1991	163.5 mm (6.4 in)
1992	63.3 mm (2.5 in)
1993	64.6 mm (2.5 in)
1994	99.4 mm (3.9 in)
1995	76.5 mm (3.0 in)
1996	103.5 mm (4.1 in)
1997	59.0 mm (2.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Alkmaar, 1905 to 1997. The record is 301.1 mm (11.9 in) in 1909, marked on the chart; the median year is 104.5 mm (4.1 in).

Wettest five days (Rx5day) at Alkmaar by year
Year	Wettest five days (Rx5day)
1905	133.0 mm (5.2 in)
1906	104.6 mm (4.1 in)
1907	212.8 mm (8.4 in)
1908	88.9 mm (3.5 in)
1909	301.1 mm (11.9 in)
1910	118.8 mm (4.7 in)
1911	87.0 mm (3.4 in)
1912	79.2 mm (3.1 in)
1913	95.9 mm (3.8 in)
1914	48.2 mm (1.9 in)
1915	198.6 mm (7.8 in)
1916	96.8 mm (3.8 in)
1917	116.8 mm (4.6 in)
1918	125.8 mm (5.0 in)
1919	92.1 mm (3.6 in)
1920	87.1 mm (3.4 in)
1921	89.6 mm (3.5 in)
1922	93.0 mm (3.7 in)
1923	120.1 mm (4.7 in)
1924	106.5 mm (4.2 in)
1925	121.7 mm (4.8 in)
1926	120.9 mm (4.8 in)
1927	143.2 mm (5.6 in)
1928	71.1 mm (2.8 in)
1929	86.3 mm (3.4 in)
1930	153.4 mm (6.0 in)
1931	139.7 mm (5.5 in)
1932	56.4 mm (2.2 in)
1933	121.5 mm (4.8 in)
1934	69.1 mm (2.7 in)
1935	144.5 mm (5.7 in)
1936	69.9 mm (2.8 in)
1937	179.7 mm (7.1 in)
1938	161.1 mm (6.3 in)
1939	175.8 mm (6.9 in)
1940	83.5 mm (3.3 in)
1941	88.9 mm (3.5 in)
1942	102.1 mm (4.0 in)
1943	89.4 mm (3.5 in)
1944	91.4 mm (3.6 in)
1945	91.9 mm (3.6 in)
1946	98.3 mm (3.9 in)
1947	118.6 mm (4.7 in)
1948	79.5 mm (3.1 in)
1949	72.1 mm (2.8 in)
1950	67.1 mm (2.6 in)
1951	92.2 mm (3.6 in)
1952	121.7 mm (4.8 in)
1953	121.7 mm (4.8 in)
1954	89.5 mm (3.5 in)
1955	138.0 mm (5.4 in)
1956	147.0 mm (5.8 in)
1957	89.0 mm (3.5 in)
1958	187.5 mm (7.4 in)
1959	65.7 mm (2.6 in)
1960	175.5 mm (6.9 in)
1961	93.0 mm (3.7 in)
1962	102.0 mm (4.0 in)
1963	89.5 mm (3.5 in)
1964	117.0 mm (4.6 in)
1965	62.0 mm (2.4 in)
1966	106.7 mm (4.2 in)
1967	106.5 mm (4.2 in)
1968	71.5 mm (2.8 in)
1969	99.5 mm (3.9 in)
1970	54.5 mm (2.1 in)
1971	119.0 mm (4.7 in)
1972	131.0 mm (5.2 in)
1973	167.1 mm (6.6 in)
1974	231.0 mm (9.1 in)
1975	104.2 mm (4.1 in)
1976	181.7 mm (7.2 in)
1977	148.0 mm (5.8 in)
1978	105.0 mm (4.1 in)
1979	78.2 mm (3.1 in)
1980	142.9 mm (5.6 in)
1981	94.2 mm (3.7 in)
1982	79.0 mm (3.1 in)
1983	73.1 mm (2.9 in)
1984	124.8 mm (4.9 in)
1985	239.0 mm (9.4 in)
1986	76.9 mm (3.0 in)
1987	92.7 mm (3.6 in)
1988	131.4 mm (5.2 in)
1989	108.6 mm (4.3 in)
1990	72.6 mm (2.9 in)
1991	272.9 mm (10.7 in)
1992	115.6 mm (4.6 in)
1993	149.9 mm (5.9 in)
1994	104.5 mm (4.1 in)
1995	101.3 mm (4.0 in)
1996	248.9 mm (9.8 in)
1997	88.6 mm (3.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Alkmaar, 1905 to 1997. The record is 201 days in 1946, marked on the chart; the median year is 68 days.

Longest dry spell (CDD) at Alkmaar by year
Year	Longest dry spell (CDD)
1905	38 days
1906	145 days
1907	127 days
1908	42 days
1909	43 days
1910	65 days
1911	39 days
1912	144 days
1913	33 days
1914	63 days
1915	47 days
1916	80 days
1917	25 days
1918	83 days
1919	50 days
1920	149 days
1921	123 days
1922	70 days
1923	197 days
1924	68 days
1925	51 days
1926	90 days
1927	39 days
1928	85 days
1929	60 days
1930	134 days
1931	71 days
1932	104 days
1933	71 days
1934	63 days
1935	104 days
1936	40 days
1937	164 days
1938	57 days
1939	54 days
1940	97 days
1941	76 days
1942	103 days
1943	54 days
1944	97 days
1945	135 days
1946	201 days
1947	56 days
1948	148 days
1949	65 days
1950	67 days
1951	49 days
1952	69 days
1953	156 days
1954	82 days
1955	108 days
1956	87 days
1957	28 days
1958	82 days
1959	117 days
1960	111 days
1961	46 days
1962	74 days
1963	98 days
1964	71 days
1965	46 days
1966	27 days
1967	41 days
1968	31 days
1969	66 days
1970	42 days
1971	38 days
1972	130 days
1973	72 days
1974	50 days
1975	63 days
1976	93 days
1977	116 days
1978	68 days
1979	31 days
1980	76 days
1981	49 days
1982	73 days
1983	50 days
1984	64 days
1985	67 days
1986	76 days
1987	41 days
1988	48 days
1989	38 days
1990	68 days
1991	70 days
1992	112 days
1993	48 days
1994	81 days
1995	95 days
1996	52 days
1997	29 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

85 years, 1906 to 1996

A day with at least 65.9 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 156.7 mm (6.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Alkmaar: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	65.9 mm (2.6 in)
5 years	88.2 mm (3.5 in)
10 years	103.7 mm (4.1 in)
25 years	124.3 mm (4.9 in)
50 years	140.2 mm (5.5 in)
100 years	156.7 mm (6.2 in)	Longer than the 85 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, 85 years of values from 1906 to 1996.

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: 163.5 mm (6.4 in) in 1991; 151.5 mm (6.0 in) in 1974; 121.0 mm (4.8 in) in 1958.

Download the Data

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

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