Botany No.1 Dam Weather Records (ASN00066007)
Record envelope, standing records and threshold days for Botany No.1 Dam (ASN00066007), Australia, with 109 years of record.
Key Facts for Botany No.1 Dam
- Botany No.1 Dam (ASN00066007) is a weather station in Australia at -33.93 latitude and 151.22 longitude, 6 m (20 ft) above sea level.
- The station reports from 1870 to 1978, 109 years of record.
- 0 records set at Botany No.1 Dam still stand.
- Records are tracked for prcp: an element needs 30 years of data to be eligible.
- Botany No.1 Dam set a daily record precipitation of 45.0 mm (1.8 in) on 5 January 1978.
About the Station
- Location: Australia, -33.93 latitude, 151.22 longitude.
- Elevation: 6 m (20 ft).
- Period of record: 1870 to 1978, 109 years.
- Eligible elements: prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| 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| Year set | Standing records |
|---|
Wettest Day of Each Month
May: 251.5 mm (9.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 166.4 mm (6.6 in) | 13 January 1911 |
| Feb | 221.0 mm (8.7 in) | 10 February 1956 |
| Mar | 161.3 mm (6.4 in) | 20 March 1892 |
| Apr | 172.7 mm (6.8 in) | 6 April 1882 |
| May | 251.5 mm (9.9 in) | 28 May 1889 |
| Jun | 154.9 mm (6.1 in) | 16 June 1952 |
| Jul | 162.6 mm (6.4 in) | 28 July 1952 |
| Aug | 133.4 mm (5.3 in) | 7 August 1967 |
| Sep | 137.7 mm (5.4 in) | 26 September 1949 |
| Oct | 153.2 mm (6.0 in) | 30 October 1959 |
| Nov | 167.6 mm (6.6 in) | 19 November 1900 |
| Dec | 113.8 mm (4.5 in) | 13 December 1910 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 January 1978 | Botany No.1 Dam, AU | daily rain | 45.0 mm (1.8 in) | 27.7 mm (1.1 in) | 59 years | 43 of 100 (Notable) |
| 23 February 1977 | Botany No.1 Dam, AU | daily rain | 85.8 mm (3.4 in) | 62.7 mm (2.5 in) | 24 years | 47 of 100 (Notable) |
| 27 January 1977 | Botany No.1 Dam, AU | daily rain | 57.6 mm (2.3 in) | 1.0 mm (0.04 in) | 89 years | 36 of 100 (Notable) |
| 15 December 1976 | Botany No.1 Dam, AU | daily rain | 21.4 mm (0.8 in) | 0.3 mm (0.01 in) | 16 years | 14 of 100 (Routine) |
| 1 November 1976 | Botany No.1 Dam, AU | daily rain | 48.0 mm (1.9 in) | 11.2 mm (0.4 in) | 67 years | 38 of 100 (Notable) |
| 21 January 1976 | Botany No.1 Dam, AU | daily rain | 67.8 mm (2.7 in) | 15.2 mm (0.6 in) | 88 years | 45 of 100 (Notable) |
| 14 January 1976 | Botany No.1 Dam, AU | daily rain | 42.0 mm (1.7 in) | 7.5 mm (0.30 in) | 28 years | 22 of 100 (Routine) |
| 7 July 1975 | Botany No.1 Dam, AU | daily rain | 16.0 mm (0.6 in) | 7.6 mm (0.30 in) | 73 years | 20 of 100 (Routine) |
| 2 September 1974 | Botany No.1 Dam, AU | daily rain | 23.0 mm (0.9 in) | 10.6 mm (0.4 in) | 79 years | 20 of 100 (Routine) |
| 28 August 1974 | Botany No.1 Dam, AU | daily rain | 45.2 mm (1.8 in) | 6.3 mm (0.25 in) | 15 years | 18 of 100 (Routine) |
| 13 June 1974 | Botany No.1 Dam, AU | daily rain | 33.6 mm (1.3 in) | 1.6 mm (0.06 in) | 77 years | 33 of 100 (Routine) |
| 11 June 1974 | Botany No.1 Dam, AU | daily rain | 24.2 mm (1.0 in) | 9.0 mm (0.35 in) | 88 years | 20 of 100 (Routine) |
| 4 June 1974 | Botany No.1 Dam, AU | daily rain | 95.4 mm (3.8 in) | 38.2 mm (1.5 in) | 77 years | 52 of 100 (Notable) |
| 12 March 1974 | Botany No.1 Dam, AU | daily rain | 69.3 mm (2.7 in) | 23.3 mm (0.9 in) | 83 years | 47 of 100 (Notable) |
| 20 February 1974 | Botany No.1 Dam, AU | daily rain | 66.4 mm (2.6 in) | 1.6 mm (0.06 in) | 83 years | 35 of 100 (Notable) |
| 12 October 1973 | Botany No.1 Dam, AU | daily rain | 25.4 mm (1.0 in) | 8.4 mm (0.33 in) | 6 years | 15 of 100 (Routine) |
| 12 February 1973 | Botany No.1 Dam, AU | daily rain | 53.3 mm (2.1 in) | 30.2 mm (1.2 in) | 4 years | 25 of 100 (Routine) |
| 8 January 1973 | Botany No.1 Dam, AU | daily rain | 90.9 mm (3.6 in) | 78.2 mm (3.1 in) | 11 years | 53 of 100 (Notable) |
| 6 November 1972 | Botany No.1 Dam, AU | daily rain | 22.6 mm (0.9 in) | 6.1 mm (0.24 in) | 3 years | 14 of 100 (Routine) |
| 26 October 1972 | Botany No.1 Dam, AU | daily rain | 27.2 mm (1.1 in) | 2.3 mm (0.09 in) | 12 years | 14 of 100 (Routine) |
Extremes by Year
1870 to 1978| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 251.5 mm (9.9 in) | 1889 | 93.0 mm (3.7 in) | 81 |
| Wettest five days (Rx5day) | 577.4 mm (22.7 in) | 1889 | 155.3 mm (6.1 in) | 81 |
| Longest dry spell (CDD) | 48 days | 1957 | 25 days | 81 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1870 | 84.3 mm (3.3 in) |
| 1880 | 42.7 mm (1.7 in) |
| 1881 | 93.0 mm (3.7 in) |
| 1882 | 172.7 mm (6.8 in) |
| 1883 | 127.0 mm (5.0 in) |
| 1884 | 102.9 mm (4.1 in) |
| 1885 | 153.4 mm (6.0 in) |
| 1886 | 139.7 mm (5.5 in) |
| 1887 | 70.1 mm (2.8 in) |
| 1888 | 76.2 mm (3.0 in) |
| 1889 | 251.5 mm (9.9 in) |
| 1890 | 113.0 mm (4.4 in) |
| 1891 | 59.9 mm (2.4 in) |
| 1892 | 161.3 mm (6.4 in) |
| 1893 | 88.9 mm (3.5 in) |
| 1894 | 82.8 mm (3.3 in) |
| 1895 | 109.2 mm (4.3 in) |
| 1896 | 65.5 mm (2.6 in) |
| 1897 | 69.9 mm (2.8 in) |
| 1898 | 116.8 mm (4.6 in) |
| 1899 | 85.1 mm (3.4 in) |
| 1900 | 167.6 mm (6.6 in) |
| 1901 | 85.1 mm (3.4 in) |
| 1902 | 113.0 mm (4.4 in) |
| 1903 | 55.1 mm (2.2 in) |
| 1904 | 104.1 mm (4.1 in) |
| 1905 | 86.6 mm (3.4 in) |
| 1906 | 69.9 mm (2.8 in) |
| 1907 | 70.4 mm (2.8 in) |
| 1908 | 106.7 mm (4.2 in) |
| 1909 | 48.3 mm (1.9 in) |
| 1910 | 113.8 mm (4.5 in) |
| 1911 | 166.4 mm (6.6 in) |
| 1912 | 64.5 mm (2.5 in) |
| 1913 | 133.4 mm (5.3 in) |
| 1914 | 74.2 mm (2.9 in) |
| 1915 | 72.9 mm (2.9 in) |
| 1916 | 141.2 mm (5.6 in) |
| 1917 | 89.7 mm (3.5 in) |
| 1918 | 90.7 mm (3.6 in) |
| 1919 | 111.3 mm (4.4 in) |
| 1920 | 74.9 mm (2.9 in) |
| 1921 | 39.4 mm (1.6 in) |
| 1922 | 34.3 mm (1.4 in) |
| 1923 | 16.0 mm (0.6 in) |
| 1926 | 0.0 mm (0.00 in) |
| 1930 | 0.0 mm (0.00 in) |
| 1944 | 63.0 mm (2.5 in) |
| 1945 | 127.0 mm (5.0 in) |
| 1946 | 103.4 mm (4.1 in) |
| 1947 | 48.3 mm (1.9 in) |
| 1948 | 46.2 mm (1.8 in) |
| 1949 | 137.7 mm (5.4 in) |
| 1950 | 106.4 mm (4.2 in) |
| 1951 | 65.5 mm (2.6 in) |
| 1952 | 162.6 mm (6.4 in) |
| 1953 | 138.7 mm (5.5 in) |
| 1954 | 131.8 mm (5.2 in) |
| 1955 | 147.3 mm (5.8 in) |
| 1956 | 221.0 mm (8.7 in) |
| 1957 | 142.2 mm (5.6 in) |
| 1958 | 219.5 mm (8.6 in) |
| 1959 | 153.2 mm (6.0 in) |
| 1960 | 108.2 mm (4.3 in) |
| 1961 | 116.8 mm (4.6 in) |
| 1962 | 205.7 mm (8.1 in) |
| 1963 | 125.7 mm (4.9 in) |
| 1965 | 0.0 mm (0.00 in) |
| 1966 | 151.1 mm (5.9 in) |
| 1967 | 133.4 mm (5.3 in) |
| 1968 | 38.1 mm (1.5 in) |
| 1969 | 95.3 mm (3.8 in) |
| 1970 | 95.3 mm (3.8 in) |
| 1971 | 87.6 mm (3.4 in) |
| 1972 | 86.4 mm (3.4 in) |
| 1973 | 90.9 mm (3.6 in) |
| 1974 | 95.4 mm (3.8 in) |
| 1975 | 38.0 mm (1.5 in) |
| 1976 | 67.8 mm (2.7 in) |
| 1977 | 85.8 mm (3.4 in) |
| 1978 | 59.4 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1870 | 183.3 mm (7.2 in) |
| 1880 | 98.0 mm (3.9 in) |
| 1881 | 139.0 mm (5.5 in) |
| 1882 | 248.6 mm (9.8 in) |
| 1883 | 177.3 mm (7.0 in) |
| 1884 | 154.8 mm (6.1 in) |
| 1885 | 336.6 mm (13.3 in) |
| 1886 | 155.3 mm (6.1 in) |
| 1887 | 231.9 mm (9.1 in) |
| 1888 | 114.3 mm (4.5 in) |
| 1889 | 577.4 mm (22.7 in) |
| 1890 | 249.8 mm (9.8 in) |
| 1891 | 151.4 mm (6.0 in) |
| 1892 | 290.8 mm (11.4 in) |
| 1893 | 155.8 mm (6.1 in) |
| 1894 | 114.5 mm (4.5 in) |
| 1895 | 164.5 mm (6.5 in) |
| 1896 | 109.4 mm (4.3 in) |
| 1897 | 147.8 mm (5.8 in) |
| 1898 | 161.7 mm (6.4 in) |
| 1899 | 150.4 mm (5.9 in) |
| 1900 | 290.6 mm (11.4 in) |
| 1901 | 169.7 mm (6.7 in) |
| 1902 | 128.3 mm (5.1 in) |
| 1903 | 140.4 mm (5.5 in) |
| 1904 | 222.0 mm (8.7 in) |
| 1905 | 123.2 mm (4.9 in) |
| 1906 | 129.4 mm (5.1 in) |
| 1907 | 132.5 mm (5.2 in) |
| 1908 | 210.6 mm (8.3 in) |
| 1909 | 84.1 mm (3.3 in) |
| 1910 | 209.8 mm (8.3 in) |
| 1911 | 230.2 mm (9.1 in) |
| 1912 | 140.0 mm (5.5 in) |
| 1913 | 182.9 mm (7.2 in) |
| 1914 | 170.9 mm (6.7 in) |
| 1915 | 207.1 mm (8.2 in) |
| 1916 | 260.1 mm (10.2 in) |
| 1917 | 263.7 mm (10.4 in) |
| 1918 | 187.1 mm (7.4 in) |
| 1919 | 188.0 mm (7.4 in) |
| 1920 | 242.6 mm (9.6 in) |
| 1921 | 117.4 mm (4.6 in) |
| 1922 | 37.6 mm (1.5 in) |
| 1923 | 42.2 mm (1.7 in) |
| 1926 | 0.0 mm (0.00 in) |
| 1930 | 0.0 mm (0.00 in) |
| 1944 | 75.5 mm (3.0 in) |
| 1945 | 195.9 mm (7.7 in) |
| 1946 | 119.9 mm (4.7 in) |
| 1947 | 84.6 mm (3.3 in) |
| 1948 | 88.4 mm (3.5 in) |
| 1949 | 174.8 mm (6.9 in) |
| 1950 | 134.6 mm (5.3 in) |
| 1951 | 160.4 mm (6.3 in) |
| 1952 | 203.2 mm (8.0 in) |
| 1953 | 331.7 mm (13.1 in) |
| 1954 | 133.1 mm (5.2 in) |
| 1955 | 211.5 mm (8.3 in) |
| 1956 | 259.1 mm (10.2 in) |
| 1957 | 165.5 mm (6.5 in) |
| 1958 | 250.8 mm (9.9 in) |
| 1959 | 175.3 mm (6.9 in) |
| 1960 | 139.5 mm (5.5 in) |
| 1961 | 304.2 mm (12.0 in) |
| 1962 | 217.4 mm (8.6 in) |
| 1963 | 182.9 mm (7.2 in) |
| 1965 | 0.0 mm (0.00 in) |
| 1966 | 156.4 mm (6.2 in) |
| 1967 | 134.4 mm (5.3 in) |
| 1968 | 40.6 mm (1.6 in) |
| 1969 | 168.7 mm (6.6 in) |
| 1970 | 143.1 mm (5.6 in) |
| 1971 | 87.6 mm (3.4 in) |
| 1972 | 143.5 mm (5.6 in) |
| 1973 | 104.9 mm (4.1 in) |
| 1974 | 129.2 mm (5.1 in) |
| 1975 | 87.8 mm (3.5 in) |
| 1976 | 74.2 mm (2.9 in) |
| 1977 | 99.2 mm (3.9 in) |
| 1978 | 85.4 mm (3.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1870 | 21 days |
| 1880 | 38 days |
| 1881 | 22 days |
| 1882 | 25 days |
| 1883 | 21 days |
| 1884 | 19 days |
| 1885 | 22 days |
| 1886 | 15 days |
| 1887 | 19 days |
| 1888 | 23 days |
| 1889 | 14 days |
| 1890 | 21 days |
| 1891 | 14 days |
| 1892 | 17 days |
| 1893 | 16 days |
| 1894 | 24 days |
| 1895 | 26 days |
| 1896 | 30 days |
| 1897 | 24 days |
| 1898 | 29 days |
| 1899 | 25 days |
| 1900 | 33 days |
| 1901 | 23 days |
| 1902 | 28 days |
| 1903 | 19 days |
| 1904 | 22 days |
| 1905 | 20 days |
| 1906 | 23 days |
| 1907 | 22 days |
| 1908 | 19 days |
| 1909 | 19 days |
| 1910 | 31 days |
| 1911 | 26 days |
| 1912 | 31 days |
| 1913 | 28 days |
| 1914 | 18 days |
| 1915 | 42 days |
| 1916 | 19 days |
| 1917 | 34 days |
| 1918 | 40 days |
| 1919 | 18 days |
| 1920 | 22 days |
| 1921 | 21 days |
| 1922 | 9 days |
| 1923 | 16 days |
| 1926 | 30 days |
| 1930 | 30 days |
| 1944 | 26 days |
| 1945 | 26 days |
| 1946 | 39 days |
| 1947 | 20 days |
| 1948 | 27 days |
| 1949 | 38 days |
| 1950 | 19 days |
| 1951 | 42 days |
| 1952 | 26 days |
| 1953 | 24 days |
| 1954 | 33 days |
| 1955 | 23 days |
| 1956 | 27 days |
| 1957 | 48 days |
| 1958 | 28 days |
| 1959 | 25 days |
| 1960 | 41 days |
| 1961 | 41 days |
| 1962 | 40 days |
| 1963 | 22 days |
| 1965 | 28 days |
| 1966 | 30 days |
| 1967 | 27 days |
| 1968 | 22 days |
| 1969 | 22 days |
| 1970 | 35 days |
| 1971 | 21 days |
| 1972 | 39 days |
| 1973 | 17 days |
| 1974 | 38 days |
| 1975 | 43 days |
| 1976 | 21 days |
| 1977 | 44 days |
| 1978 | 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
63 years, 1870 to 1977A day with at least 103.3 mm (4.1 in) of rain is expected about once in 2 years. A day with at least 260.7 mm (10.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 103.3 mm (4.1 in) | |
| 5 years | 142.7 mm (5.6 in) | |
| 10 years | 169.8 mm (6.7 in) | |
| 25 years | 205.4 mm (8.1 in) | |
| 50 years | 232.7 mm (9.2 in) | |
| 100 years | 260.7 mm (10.3 in) | Longer than the 63 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, 63 years of values from 1870 to 1977.
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: 251.5 mm (9.9 in) in 1889; 221.0 mm (8.7 in) in 1956; 219.5 mm (8.6 in) in 1958.
Download the Data
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 . Last revised (2025-12-31).