Glen Roy Weather Records (SF000997350)

Record envelope, standing records and threshold days for Glen Roy (SF000997350), South Africa, with 75 years of record.

Key Facts for Glen Roy

Glen Roy (SF000997350) is a weather station in South Africa at -32.27 latitude and 26.42 longitude, 1,800 m (5,906 ft) above sea level.
The station reports from 1923 to 1997, 75 years of record.
0 records set at Glen Roy still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Glen Roy set a daily record precipitation of 19.0 mm (0.7 in) on 8 October 1997.

About the Station

Location: South Africa, -32.27 latitude, 26.42 longitude.
Elevation: 1,800 m (5,906 ft).
Period of record: 1923 to 1997, 75 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 Glen Roy. 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 Glen Roy, 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 Glen Roy still stand.

All-Time Record Progression

1 new records

1 all-time records were set at Glen Roy between 1 November 1956 and 1 November 1956. Each dot is a new record.

Wettest Day of Each Month

Nov: 72.5 mm (2.9 in)

The wettest day on record for each calendar month at Glen Roy. The most was 72.5 mm (2.9 in) on 1 November 1956.

Record daily precipitation for each month at Glen Roy
Month	Record daily precipitation (mm)	Date
Jan	58.7 mm (2.3 in)	1 January 1932
Feb	57.4 mm (2.3 in)	7 February 1944
Mar	58.2 mm (2.3 in)	9 March 1944
Apr	48.0 mm (1.9 in)	26 April 1967
May	57.5 mm (2.3 in)	16 May 1974
Jun	52.5 mm (2.1 in)	6 June 1981
Jul	52.5 mm (2.1 in)	17 July 1959
Aug	56.0 mm (2.2 in)	22 August 1974
Sep	63.5 mm (2.5 in)	2 September 1968
Oct	48.8 mm (1.9 in)	21 October 1946
Nov	72.5 mm (2.9 in)	1 November 1956
Dec	56.0 mm (2.2 in)	19 December 1985

Latest Records

Latest records at Glen Roy
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 October 1997	Glen Roy, ZA	daily rain	19.0 mm (0.7 in)	4.5 mm (0.18 in)	6 years	13 of 100 (Routine)
7 October 1997	Glen Roy, ZA	daily rain	27.0 mm (1.1 in)	3.0 mm (0.12 in)	12 years	13 of 100 (Routine)
29 June 1997	Glen Roy, ZA	daily rain	14.0 mm (0.6 in)	10.0 mm (0.4 in)	23 years	20 of 100 (Routine)
8 January 1997	Glen Roy, ZA	daily rain	42.0 mm (1.7 in)	25.0 mm (1.0 in)	20 years	42 of 100 (Notable)
27 December 1996	Glen Roy, ZA	daily rain	17.0 mm (0.7 in)	8.4 mm (0.33 in)	38 years	20 of 100 (Routine)
16 November 1996	Glen Roy, ZA	daily rain	28.0 mm (1.1 in)	16.8 mm (0.7 in)	14 years	28 of 100 (Routine)
7 November 1996	Glen Roy, ZA	daily rain	38.0 mm (1.5 in)	13.0 mm (0.5 in)	5 years	21 of 100 (Routine)
6 November 1996	Glen Roy, ZA	daily rain (Tie)	16.0 mm (0.6 in)	tie	36 years	4 of 100 (Routine)
5 August 1996	Glen Roy, ZA	daily rain	10.5 mm (0.4 in)	1.1 mm (0.04 in)	69 years	20 of 100 (Routine)
22 January 1996	Glen Roy, ZA	daily rain	30.0 mm (1.2 in)	17.0 mm (0.7 in)	20 years	32 of 100 (Routine)
30 November 1995	Glen Roy, ZA	daily rain	28.0 mm (1.1 in)	10.9 mm (0.4 in)	17 years	23 of 100 (Routine)
6 May 1995	Glen Roy, ZA	daily rain	30.5 mm (1.2 in)	11.5 mm (0.5 in)	34 years	31 of 100 (Routine)
9 October 1994	Glen Roy, ZA	daily rain	19.5 mm (0.8 in)	3.2 mm (0.13 in)	64 years	20 of 100 (Routine)
25 July 1994	Glen Roy, ZA	daily rain	21.0 mm (0.8 in)	14.5 mm (0.6 in)	32 years	20 of 100 (Routine)
3 February 1994	Glen Roy, ZA	daily rain	39.0 mm (1.5 in)	9.0 mm (0.35 in)	8 years	19 of 100 (Routine)
10 November 1993	Glen Roy, ZA	daily rain	18.5 mm (0.7 in)	3.5 mm (0.14 in)	30 years	19 of 100 (Routine)
23 October 1993	Glen Roy, ZA	daily rain (Tie)	32.0 mm (1.3 in)	tie	36 years	4 of 100 (Routine)
20 February 1993	Glen Roy, ZA	daily rain	25.5 mm (1.0 in)	6.4 mm (0.25 in)	41 years	26 of 100 (Routine)
30 January 1993	Glen Roy, ZA	daily rain	21.0 mm (0.8 in)	1.5 mm (0.06 in)	10 years	11 of 100 (Routine)
20 September 1992	Glen Roy, ZA	daily rain	14.5 mm (0.6 in)	4.5 mm (0.18 in)	9 years	14 of 100 (Routine)

Extremes by Year

1923 to 1997

Yearly extremes at Glen Roy: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Wettest day (Rx1day)	72.5 mm (2.9 in)	1956	38.0 mm (1.5 in)	75
Wettest five days (Rx5day)	147.5 mm (5.8 in)	1974	64.5 mm (2.5 in)	75
Longest dry spell (CDD)	78 days	1997	36 days	75

Wettest day (Rx1day)

The wettest day of the year at Glen Roy, 1923 to 1997. The record is 72.5 mm (2.9 in) in 1956, marked on the chart; the median year is 38.0 mm (1.5 in).

Wettest day (Rx1day) at Glen Roy by year
Year	Wettest day (Rx1day)
1923	19.3 mm (0.8 in)
1924	32.5 mm (1.3 in)
1925	47.0 mm (1.9 in)
1926	31.2 mm (1.2 in)
1927	36.3 mm (1.4 in)
1928	26.4 mm (1.0 in)
1929	53.6 mm (2.1 in)
1930	33.8 mm (1.3 in)
1931	51.8 mm (2.0 in)
1932	58.7 mm (2.3 in)
1933	51.8 mm (2.0 in)
1934	34.0 mm (1.3 in)
1935	35.3 mm (1.4 in)
1936	36.8 mm (1.4 in)
1937	35.3 mm (1.4 in)
1938	23.6 mm (0.9 in)
1939	39.9 mm (1.6 in)
1940	23.4 mm (0.9 in)
1941	30.0 mm (1.2 in)
1942	46.7 mm (1.8 in)
1943	53.1 mm (2.1 in)
1944	58.2 mm (2.3 in)
1945	31.0 mm (1.2 in)
1946	48.8 mm (1.9 in)
1947	29.2 mm (1.1 in)
1948	38.6 mm (1.5 in)
1949	20.3 mm (0.8 in)
1950	36.8 mm (1.4 in)
1951	39.4 mm (1.6 in)
1952	24.9 mm (1.0 in)
1953	41.5 mm (1.6 in)
1954	38.5 mm (1.5 in)
1955	31.0 mm (1.2 in)
1956	72.5 mm (2.9 in)
1957	37.5 mm (1.5 in)
1958	30.0 mm (1.2 in)
1959	52.5 mm (2.1 in)
1960	43.5 mm (1.7 in)
1961	30.5 mm (1.2 in)
1962	38.0 mm (1.5 in)
1963	55.5 mm (2.2 in)
1964	35.5 mm (1.4 in)
1965	48.0 mm (1.9 in)
1966	36.5 mm (1.4 in)
1967	48.0 mm (1.9 in)
1968	63.5 mm (2.5 in)
1969	38.7 mm (1.5 in)
1970	45.0 mm (1.8 in)
1971	50.0 mm (2.0 in)
1972	34.0 mm (1.3 in)
1973	33.5 mm (1.3 in)
1974	57.5 mm (2.3 in)
1975	39.0 mm (1.5 in)
1976	39.5 mm (1.6 in)
1977	43.5 mm (1.7 in)
1978	29.7 mm (1.2 in)
1979	37.3 mm (1.5 in)
1980	51.5 mm (2.0 in)
1981	52.5 mm (2.1 in)
1982	31.0 mm (1.2 in)
1983	50.0 mm (2.0 in)
1984	38.0 mm (1.5 in)
1985	56.0 mm (2.2 in)
1986	35.0 mm (1.4 in)
1987	38.0 mm (1.5 in)
1988	46.0 mm (1.8 in)
1989	42.0 mm (1.7 in)
1990	16.0 mm (0.6 in)
1991	47.0 mm (1.9 in)
1992	21.0 mm (0.8 in)
1993	32.0 mm (1.3 in)
1994	39.0 mm (1.5 in)
1995	30.5 mm (1.2 in)
1996	38.0 mm (1.5 in)
1997	42.0 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Glen Roy, 1923 to 1997. The record is 147.5 mm (5.8 in) in 1974, marked on the chart; the median year is 64.5 mm (2.5 in).

Wettest five days (Rx5day) at Glen Roy by year
Year	Wettest five days (Rx5day)
1923	31.8 mm (1.3 in)
1924	38.3 mm (1.5 in)
1925	97.5 mm (3.8 in)
1926	40.6 mm (1.6 in)
1927	71.6 mm (2.8 in)
1928	51.8 mm (2.0 in)
1929	83.3 mm (3.3 in)
1930	64.5 mm (2.5 in)
1931	88.6 mm (3.5 in)
1932	147.3 mm (5.8 in)
1933	58.2 mm (2.3 in)
1934	47.6 mm (1.9 in)
1935	85.8 mm (3.4 in)
1936	47.3 mm (1.9 in)
1937	52.5 mm (2.1 in)
1938	43.4 mm (1.7 in)
1939	73.2 mm (2.9 in)
1940	35.7 mm (1.4 in)
1941	41.7 mm (1.6 in)
1942	93.7 mm (3.7 in)
1943	116.6 mm (4.6 in)
1944	119.2 mm (4.7 in)
1945	43.4 mm (1.7 in)
1946	77.5 mm (3.1 in)
1947	46.5 mm (1.8 in)
1948	55.5 mm (2.2 in)
1949	34.1 mm (1.3 in)
1950	58.4 mm (2.3 in)
1951	79.8 mm (3.1 in)
1952	51.3 mm (2.0 in)
1953	93.0 mm (3.7 in)
1954	71.6 mm (2.8 in)
1955	45.7 mm (1.8 in)
1956	100.9 mm (4.0 in)
1957	40.5 mm (1.6 in)
1958	47.5 mm (1.9 in)
1959	99.7 mm (3.9 in)
1960	52.0 mm (2.0 in)
1961	44.9 mm (1.8 in)
1962	50.0 mm (2.0 in)
1963	91.6 mm (3.6 in)
1964	53.8 mm (2.1 in)
1965	64.5 mm (2.5 in)
1966	36.7 mm (1.4 in)
1967	54.0 mm (2.1 in)
1968	72.7 mm (2.9 in)
1969	73.2 mm (2.9 in)
1970	139.0 mm (5.5 in)
1971	69.8 mm (2.7 in)
1972	51.9 mm (2.0 in)
1973	56.0 mm (2.2 in)
1974	147.5 mm (5.8 in)
1975	78.3 mm (3.1 in)
1976	122.5 mm (4.8 in)
1977	77.6 mm (3.1 in)
1978	77.6 mm (3.1 in)
1979	97.5 mm (3.8 in)
1980	61.0 mm (2.4 in)
1981	91.8 mm (3.6 in)
1982	43.6 mm (1.7 in)
1983	141.0 mm (5.6 in)
1984	47.0 mm (1.9 in)
1985	86.5 mm (3.4 in)
1986	65.0 mm (2.6 in)
1987	65.0 mm (2.6 in)
1988	125.5 mm (4.9 in)
1989	73.0 mm (2.9 in)
1990	21.0 mm (0.8 in)
1991	67.5 mm (2.7 in)
1992	32.5 mm (1.3 in)
1993	45.5 mm (1.8 in)
1994	66.0 mm (2.6 in)
1995	56.5 mm (2.2 in)
1996	60.0 mm (2.4 in)
1997	47.0 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Glen Roy, 1923 to 1997. The record is 78 days in 1997, marked on the chart; the median year is 36 days.

Longest dry spell (CDD) at Glen Roy by year
Year	Longest dry spell (CDD)
1923	38 days
1924	33 days
1925	27 days
1926	42 days
1927	73 days
1928	47 days
1929	31 days
1930	44 days
1931	30 days
1932	48 days
1933	32 days
1934	23 days
1935	25 days
1936	37 days
1937	51 days
1938	28 days
1939	49 days
1940	39 days
1941	32 days
1942	22 days
1943	24 days
1944	36 days
1945	59 days
1946	28 days
1947	26 days
1948	45 days
1949	44 days
1950	23 days
1951	52 days
1952	29 days
1953	32 days
1954	53 days
1955	26 days
1956	30 days
1957	26 days
1958	52 days
1959	45 days
1960	25 days
1961	24 days
1962	31 days
1963	25 days
1964	25 days
1965	29 days
1966	33 days
1967	30 days
1968	29 days
1969	23 days
1970	32 days
1971	28 days
1972	35 days
1973	36 days
1974	22 days
1975	39 days
1976	35 days
1977	36 days
1978	39 days
1979	28 days
1980	36 days
1981	38 days
1982	36 days
1983	36 days
1984	42 days
1985	67 days
1986	51 days
1987	28 days
1988	60 days
1989	37 days
1990	49 days
1991	37 days
1992	44 days
1993	44 days
1994	39 days
1995	39 days
1996	77 days
1997	78 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

71 years, 1924 to 1997

A day with at least 39.7 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 68.8 mm (2.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Glen Roy: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	39.7 mm (1.6 in)
5 years	49.3 mm (1.9 in)
10 years	54.8 mm (2.2 in)
25 years	61.0 mm (2.4 in)
50 years	65.1 mm (2.6 in)
100 years	68.8 mm (2.7 in)	Longer than the 71 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, 71 years of values from 1924 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: 72.5 mm (2.9 in) in 1956; 63.5 mm (2.5 in) in 1968; 58.7 mm (2.3 in) in 1932.

Download the Data

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