Chatswood Water Supply Weather Records (ASN00066012)
Record envelope, standing records and threshold days for Chatswood Water Supply (ASN00066012), Australia, with 77 years of record.
Key Facts for Chatswood Water Supply
- Chatswood Water Supply (ASN00066012) is a weather station in Australia at -33.80 latitude and 151.20 longitude, 103 m (338 ft) above sea level.
- The station reports from 1894 to 1970, 77 years of record.
- 0 records set at Chatswood Water Supply still stand.
- Records are tracked for prcp: an element needs 30 years of data to be eligible.
- Chatswood Water Supply set a daily record precipitation of 42.2 mm (1.7 in) on 27 February 1970.
About the Station
- Location: Australia, -33.80 latitude, 151.20 longitude.
- Elevation: 103 m (338 ft).
- Period of record: 1894 to 1970, 77 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
Jan: 201.9 mm (7.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 201.9 mm (7.9 in) | 13 January 1911 |
| Feb | 180.3 mm (7.1 in) | 10 February 1956 |
| Mar | 164.6 mm (6.5 in) | 10 March 1958 |
| Apr | 137.2 mm (5.4 in) | 16 April 1969 |
| May | 185.7 mm (7.3 in) | 1 May 1955 |
| Jun | 126.2 mm (5.0 in) | 15 June 1952 |
| Jul | 140.7 mm (5.5 in) | 28 July 1908 |
| Aug | 139.7 mm (5.5 in) | 30 August 1963 |
| Sep | 89.7 mm (3.5 in) | 20 September 1917 |
| Oct | 109.7 mm (4.3 in) | 13 October 1902 |
| Nov | 181.9 mm (7.2 in) | 19 November 1961 |
| Dec | 109.7 mm (4.3 in) | 10 December 1920 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 February 1970 | Chatswood Water Supply, AU | daily rain | 42.2 mm (1.7 in) | 20.6 mm (0.8 in) | 58 years | 35 of 100 (Notable) |
| 29 January 1970 | Chatswood Water Supply, AU | daily rain | 29.7 mm (1.2 in) | 3.0 mm (0.12 in) | 12 years | 11 of 100 (Routine) |
| 16 November 1969 | Chatswood Water Supply, AU | daily rain | 24.1 mm (0.9 in) | 8.6 mm (0.34 in) | 2 years | 11 of 100 (Routine) |
| 14 November 1969 | Chatswood Water Supply, AU | daily rain | 147.3 mm (5.8 in) | 111.7 mm (4.4 in) | 63 years | 65 of 100 (Major) |
| 13 November 1969 | Chatswood Water Supply, AU | daily rain | 35.6 mm (1.4 in) | 16.5 mm (0.6 in) | 48 years | 30 of 100 (Routine) |
| 12 November 1969 | Chatswood Water Supply, AU | daily rain | 25.4 mm (1.0 in) | 1.0 mm (0.04 in) | 48 years | 21 of 100 (Routine) |
| 6 November 1969 | Chatswood Water Supply, AU | daily rain | 17.0 mm (0.7 in) | 2.8 mm (0.11 in) | 16 years | 12 of 100 (Routine) |
| 16 August 1969 | Chatswood Water Supply, AU | daily rain | 19.8 mm (0.8 in) | 2.5 mm (0.10 in) | 11 years | 11 of 100 (Routine) |
| 10 June 1969 | Chatswood Water Supply, AU | daily rain | 75.7 mm (3.0 in) | 16.8 mm (0.7 in) | 68 years | 35 of 100 (Notable) |
| 16 April 1969 | Chatswood Water Supply, AU | monthly rain | 137.2 mm (5.4 in) | 28.7 mm (1.1 in) | 23 years | 41 of 100 (Notable) |
| 5 December 1968 | Chatswood Water Supply, AU | daily rain | 55.4 mm (2.2 in) | 26.4 mm (1.0 in) | 8 years | 27 of 100 (Routine) |
| 5 January 1968 | Chatswood Water Supply, AU | daily rain | 56.6 mm (2.2 in) | 20.8 mm (0.8 in) | 46 years | 31 of 100 (Routine) |
| 16 November 1967 | Chatswood Water Supply, AU | daily rain | 15.5 mm (0.6 in) | 1.8 mm (0.07 in) | 5 years | 9 of 100 (Routine) |
| 8 November 1967 | Chatswood Water Supply, AU | daily rain | 42.7 mm (1.7 in) | 23.6 mm (0.9 in) | 42 years | 32 of 100 (Routine) |
| 20 October 1967 | Chatswood Water Supply, AU | daily rain | 24.6 mm (1.0 in) | 3.0 mm (0.12 in) | 52 years | 20 of 100 (Routine) |
| 12 October 1967 | Chatswood Water Supply, AU | daily rain | 26.4 mm (1.0 in) | 13.4 mm (0.5 in) | 62 years | 35 of 100 (Notable) |
| 7 September 1967 | Chatswood Water Supply, AU | daily rain | 15.2 mm (0.6 in) | 6.3 mm (0.25 in) | 56 years | 20 of 100 (Routine) |
| 5 September 1967 | Chatswood Water Supply, AU | daily rain | 27.9 mm (1.1 in) | 13.7 mm (0.5 in) | 48 years | 34 of 100 (Routine) |
| 23 June 1967 | Chatswood Water Supply, AU | daily rain | 98.0 mm (3.9 in) | 23.1 mm (0.9 in) | 70 years | 40 of 100 (Notable) |
| 6 March 1967 | Chatswood Water Supply, AU | daily rain | 64.3 mm (2.5 in) | 22.4 mm (0.9 in) | 8 years | 21 of 100 (Routine) |
Extremes by Year
1894 to 1970| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 201.9 mm (7.9 in) | 1911 | 101.6 mm (4.0 in) | 57 |
| Wettest five days (Rx5day) | 421.7 mm (16.6 in) | 1961 | 183.9 mm (7.2 in) | 57 |
| Longest dry spell (CDD) | 51 days | 1915 | 24 days | 57 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1894 | 78.7 mm (3.1 in) |
| 1895 | 85.3 mm (3.4 in) |
| 1896 | 74.9 mm (2.9 in) |
| 1897 | 112.3 mm (4.4 in) |
| 1898 | 157.5 mm (6.2 in) |
| 1899 | 69.9 mm (2.8 in) |
| 1900 | 96.5 mm (3.8 in) |
| 1901 | 161.8 mm (6.4 in) |
| 1902 | 109.7 mm (4.3 in) |
| 1903 | 50.0 mm (2.0 in) |
| 1904 | 122.7 mm (4.8 in) |
| 1905 | 70.6 mm (2.8 in) |
| 1906 | 101.6 mm (4.0 in) |
| 1907 | 89.9 mm (3.5 in) |
| 1908 | 140.7 mm (5.5 in) |
| 1909 | 66.0 mm (2.6 in) |
| 1910 | 104.6 mm (4.1 in) |
| 1911 | 201.9 mm (7.9 in) |
| 1912 | 87.1 mm (3.4 in) |
| 1913 | 118.9 mm (4.7 in) |
| 1914 | 101.6 mm (4.0 in) |
| 1915 | 73.2 mm (2.9 in) |
| 1916 | 89.9 mm (3.5 in) |
| 1917 | 89.7 mm (3.5 in) |
| 1918 | 146.1 mm (5.8 in) |
| 1919 | 66.5 mm (2.6 in) |
| 1920 | 109.7 mm (4.3 in) |
| 1921 | 105.4 mm (4.1 in) |
| 1922 | 101.6 mm (4.0 in) |
| 1923 | 81.3 mm (3.2 in) |
| 1924 | 54.1 mm (2.1 in) |
| 1925 | 108.0 mm (4.3 in) |
| 1944 | 52.8 mm (2.1 in) |
| 1945 | 62.5 mm (2.5 in) |
| 1946 | 108.5 mm (4.3 in) |
| 1947 | 64.8 mm (2.6 in) |
| 1948 | 86.9 mm (3.4 in) |
| 1949 | 164.6 mm (6.5 in) |
| 1950 | 133.1 mm (5.2 in) |
| 1951 | 85.6 mm (3.4 in) |
| 1952 | 126.2 mm (5.0 in) |
| 1953 | 159.3 mm (6.3 in) |
| 1954 | 137.7 mm (5.4 in) |
| 1955 | 185.7 mm (7.3 in) |
| 1956 | 180.3 mm (7.1 in) |
| 1957 | 48.3 mm (1.9 in) |
| 1958 | 164.6 mm (6.5 in) |
| 1959 | 146.8 mm (5.8 in) |
| 1960 | 95.3 mm (3.8 in) |
| 1961 | 181.9 mm (7.2 in) |
| 1962 | 92.5 mm (3.6 in) |
| 1963 | 139.7 mm (5.5 in) |
| 1966 | 156.2 mm (6.1 in) |
| 1967 | 98.0 mm (3.9 in) |
| 1968 | 56.6 mm (2.2 in) |
| 1969 | 147.3 mm (5.8 in) |
| 1970 | 42.2 mm (1.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1894 | 150.9 mm (5.9 in) |
| 1895 | 146.1 mm (5.8 in) |
| 1896 | 140.4 mm (5.5 in) |
| 1897 | 202.8 mm (8.0 in) |
| 1898 | 198.6 mm (7.8 in) |
| 1899 | 143.2 mm (5.6 in) |
| 1900 | 251.5 mm (9.9 in) |
| 1901 | 166.3 mm (6.5 in) |
| 1902 | 123.4 mm (4.9 in) |
| 1903 | 112.3 mm (4.4 in) |
| 1904 | 237.7 mm (9.4 in) |
| 1905 | 104.2 mm (4.1 in) |
| 1906 | 117.4 mm (4.6 in) |
| 1907 | 172.3 mm (6.8 in) |
| 1908 | 222.3 mm (8.8 in) |
| 1909 | 144.8 mm (5.7 in) |
| 1910 | 220.3 mm (8.7 in) |
| 1911 | 281.9 mm (11.1 in) |
| 1912 | 167.9 mm (6.6 in) |
| 1913 | 178.7 mm (7.0 in) |
| 1914 | 246.4 mm (9.7 in) |
| 1915 | 185.5 mm (7.3 in) |
| 1916 | 218.4 mm (8.6 in) |
| 1917 | 163.3 mm (6.4 in) |
| 1918 | 219.8 mm (8.7 in) |
| 1919 | 171.2 mm (6.7 in) |
| 1920 | 350.2 mm (13.8 in) |
| 1921 | 146.1 mm (5.8 in) |
| 1922 | 212.3 mm (8.4 in) |
| 1923 | 139.8 mm (5.5 in) |
| 1924 | 110.9 mm (4.4 in) |
| 1925 | 182.8 mm (7.2 in) |
| 1944 | 106.9 mm (4.2 in) |
| 1945 | 204.5 mm (8.1 in) |
| 1946 | 249.2 mm (9.8 in) |
| 1947 | 123.5 mm (4.9 in) |
| 1948 | 159.0 mm (6.3 in) |
| 1949 | 336.8 mm (13.3 in) |
| 1950 | 315.7 mm (12.4 in) |
| 1951 | 238.9 mm (9.4 in) |
| 1952 | 201.7 mm (7.9 in) |
| 1953 | 232.4 mm (9.1 in) |
| 1954 | 153.7 mm (6.1 in) |
| 1955 | 235.8 mm (9.3 in) |
| 1956 | 313.6 mm (12.3 in) |
| 1957 | 97.3 mm (3.8 in) |
| 1958 | 307.0 mm (12.1 in) |
| 1959 | 185.1 mm (7.3 in) |
| 1960 | 180.9 mm (7.1 in) |
| 1961 | 421.7 mm (16.6 in) |
| 1962 | 251.0 mm (9.9 in) |
| 1963 | 208.1 mm (8.2 in) |
| 1966 | 183.9 mm (7.2 in) |
| 1967 | 164.9 mm (6.5 in) |
| 1968 | 110.2 mm (4.3 in) |
| 1969 | 241.3 mm (9.5 in) |
| 1970 | 64.6 mm (2.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1894 | 24 days |
| 1895 | 30 days |
| 1896 | 19 days |
| 1897 | 27 days |
| 1898 | 30 days |
| 1899 | 24 days |
| 1900 | 25 days |
| 1901 | 24 days |
| 1902 | 29 days |
| 1903 | 22 days |
| 1904 | 24 days |
| 1905 | 19 days |
| 1906 | 24 days |
| 1907 | 22 days |
| 1908 | 13 days |
| 1909 | 17 days |
| 1910 | 31 days |
| 1911 | 33 days |
| 1912 | 32 days |
| 1913 | 24 days |
| 1914 | 17 days |
| 1915 | 51 days |
| 1916 | 20 days |
| 1917 | 33 days |
| 1918 | 41 days |
| 1919 | 18 days |
| 1920 | 33 days |
| 1921 | 20 days |
| 1922 | 40 days |
| 1923 | 25 days |
| 1924 | 18 days |
| 1925 | 31 days |
| 1944 | 20 days |
| 1945 | 27 days |
| 1946 | 44 days |
| 1947 | 25 days |
| 1948 | 29 days |
| 1949 | 17 days |
| 1950 | 14 days |
| 1951 | 26 days |
| 1952 | 28 days |
| 1953 | 24 days |
| 1954 | 32 days |
| 1955 | 18 days |
| 1956 | 21 days |
| 1957 | 33 days |
| 1958 | 23 days |
| 1959 | 16 days |
| 1960 | 18 days |
| 1961 | 24 days |
| 1962 | 25 days |
| 1963 | 21 days |
| 1966 | 31 days |
| 1967 | 37 days |
| 1968 | 27 days |
| 1969 | 21 days |
| 1970 | 39 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
54 years, 1894 to 1969A day with at least 103.0 mm (4.1 in) of rain is expected about once in 2 years. A day with at least 228.6 mm (9.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 103.0 mm (4.1 in) | |
| 5 years | 139.9 mm (5.5 in) | |
| 10 years | 162.9 mm (6.4 in) | |
| 25 years | 190.6 mm (7.5 in) | |
| 50 years | 210.1 mm (8.3 in) | |
| 100 years | 228.6 mm (9.0 in) | Longer than the 54 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, 54 years of values from 1894 to 1969.
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: 201.9 mm (7.9 in) in 1911; 185.7 mm (7.3 in) in 1955; 181.9 mm (7.2 in) in 1961.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).