Wahroonga Reservoir Weather Records (ASN00066063)
Record envelope, standing records and threshold days for Wahroonga Reservoir (ASN00066063), Australia, with 86 years of record.
Key Facts for Wahroonga Reservoir
- Wahroonga Reservoir (ASN00066063) is a weather station in Australia at -33.72 latitude and 151.11 longitude, 205 m (673 ft) above sea level.
- The station reports from 1906 to 1991, 86 years of record.
- 0 records set at Wahroonga Reservoir still stand.
- Records are tracked for prcp: an element needs 30 years of data to be eligible.
- Wahroonga Reservoir set a daily record precipitation of 95.5 mm (3.8 in) on 2 August 1990.
About the Station
- Location: Australia, -33.72 latitude, 151.11 longitude.
- Elevation: 205 m (673 ft).
- Period of record: 1906 to 1991, 86 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
Mar: 357.6 mm (14.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 179.0 mm (7.0 in) | 29 January 1978 |
| Feb | 173.2 mm (6.8 in) | 10 February 1956 |
| Mar | 357.6 mm (14.1 in) | 28 March 1942 |
| Apr | 194.8 mm (7.7 in) | 30 April 1988 |
| May | 153.4 mm (6.0 in) | 1 May 1988 |
| Jun | 153.7 mm (6.1 in) | 18 June 1949 |
| Jul | 151.1 mm (5.9 in) | 26 July 1952 |
| Aug | 198.6 mm (7.8 in) | 6 August 1986 |
| Sep | 121.9 mm (4.8 in) | 2 September 1970 |
| Oct | 90.9 mm (3.6 in) | 14 October 1942 |
| Nov | 171.5 mm (6.8 in) | 19 November 1961 |
| Dec | 119.1 mm (4.7 in) | 9 December 1970 |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 2 August 1990 | Wahroonga Reservoir, AU | daily rain | 95.5 mm (3.8 in) | 62.2 mm (2.4 in) | 81 years | 64 of 100 (Major) |
| 1 August 1990 | Wahroonga Reservoir, AU | daily rain | 70.5 mm (2.8 in) | 6.5 mm (0.26 in) | 39 years | 22 of 100 (Routine) |
| 20 April 1990 | Wahroonga Reservoir, AU | daily rain | 54.2 mm (2.1 in) | 17.6 mm (0.7 in) | 25 years | 23 of 100 (Routine) |
| 19 April 1990 | Wahroonga Reservoir, AU | daily rain | 21.2 mm (0.8 in) | 0.6 mm (0.02 in) | 44 years | 20 of 100 (Routine) |
| 5 April 1990 | Wahroonga Reservoir, AU | daily rain | 22.5 mm (0.9 in) | 3.5 mm (0.14 in) | 4 years | 10 of 100 (Routine) |
| 7 February 1990 | Wahroonga Reservoir, AU | daily rain | 70.2 mm (2.8 in) | 30.1 mm (1.2 in) | 36 years | 34 of 100 (Routine) |
| 6 December 1989 | Wahroonga Reservoir, AU | daily rain | 39.0 mm (1.5 in) | 9.5 mm (0.37 in) | 43 years | 26 of 100 (Routine) |
| 17 August 1989 | Wahroonga Reservoir, AU | daily rain | 17.4 mm (0.7 in) | 0.1 mm (0.00 in) | 28 years | 16 of 100 (Routine) |
| 17 May 1989 | Wahroonga Reservoir, AU | daily rain | 32.5 mm (1.3 in) | 0.7 mm (0.03 in) | 46 years | 21 of 100 (Routine) |
| 16 November 1988 | Wahroonga Reservoir, AU | daily rain | 44.0 mm (1.7 in) | 7.2 mm (0.28 in) | 27 years | 20 of 100 (Routine) |
| 27 September 1988 | Wahroonga Reservoir, AU | daily rain | 13.6 mm (0.5 in) | 6.7 mm (0.26 in) | 45 years | 20 of 100 (Routine) |
| 16 September 1988 | Wahroonga Reservoir, AU | daily rain | 53.2 mm (2.1 in) | 34.4 mm (1.4 in) | 15 years | 43 of 100 (Notable) |
| 6 July 1988 | Wahroonga Reservoir, AU | daily rain | 93.2 mm (3.7 in) | 78.5 mm (3.1 in) | 48 years | 62 of 100 (Major) |
| 5 July 1988 | Wahroonga Reservoir, AU | daily rain | 38.0 mm (1.5 in) | 2.4 mm (0.09 in) | 13 years | 12 of 100 (Routine) |
| 1 May 1988 | Wahroonga Reservoir, AU | monthly rain | 153.4 mm (6.0 in) | 7.3 mm (0.29 in) | 32 years | 30 of 100 (Routine) |
| 30 April 1988 | Wahroonga Reservoir, AU | monthly rain | 194.8 mm (7.7 in) | 26.4 mm (1.0 in) | 42 years | 44 of 100 (Notable) |
| 4 January 1988 | Wahroonga Reservoir, AU | daily rain | 19.6 mm (0.8 in) | 1.8 mm (0.07 in) | 18 years | 13 of 100 (Routine) |
| 22 December 1987 | Wahroonga Reservoir, AU | daily rain | 48.0 mm (1.9 in) | 27.0 mm (1.1 in) | 12 years | 30 of 100 (Routine) |
| 12 November 1987 | Wahroonga Reservoir, AU | daily rain | 95.0 mm (3.7 in) | 47.3 mm (1.9 in) | 2 years | 35 of 100 (Notable) |
| 11 November 1987 | Wahroonga Reservoir, AU | daily rain | 47.4 mm (1.9 in) | 30.6 mm (1.2 in) | 10 years | 28 of 100 (Routine) |
Extremes by Year
1906 to 1991| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Wettest day (Rx1day) | 357.6 mm (14.1 in) | 1942 | 102.9 mm (4.1 in) | 57 |
| Wettest five days (Rx5day) | 477.3 mm (18.8 in) | 1942 | 198.6 mm (7.8 in) | 57 |
| Longest dry spell (CDD) | 55 days | 1977 | 25 days | 57 |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1906 | 53.6 mm (2.1 in) |
| 1907 | 83.3 mm (3.3 in) |
| 1908 | 116.8 mm (4.6 in) |
| 1909 | 53.3 mm (2.1 in) |
| 1934 | 82.6 mm (3.3 in) |
| 1940 | 91.4 mm (3.6 in) |
| 1941 | 42.9 mm (1.7 in) |
| 1942 | 357.6 mm (14.1 in) |
| 1943 | 102.9 mm (4.1 in) |
| 1944 | 50.8 mm (2.0 in) |
| 1945 | 87.6 mm (3.4 in) |
| 1946 | 168.4 mm (6.6 in) |
| 1947 | 55.4 mm (2.2 in) |
| 1948 | 92.7 mm (3.6 in) |
| 1949 | 175.8 mm (6.9 in) |
| 1950 | 125.7 mm (4.9 in) |
| 1951 | 118.4 mm (4.7 in) |
| 1952 | 151.1 mm (5.9 in) |
| 1953 | 137.2 mm (5.4 in) |
| 1954 | 161.3 mm (6.4 in) |
| 1955 | 146.1 mm (5.8 in) |
| 1956 | 173.2 mm (6.8 in) |
| 1957 | 60.7 mm (2.4 in) |
| 1958 | 160.5 mm (6.3 in) |
| 1959 | 84.1 mm (3.3 in) |
| 1960 | 86.9 mm (3.4 in) |
| 1961 | 171.5 mm (6.8 in) |
| 1962 | 113.3 mm (4.5 in) |
| 1963 | 132.6 mm (5.2 in) |
| 1964 | 127.0 mm (5.0 in) |
| 1965 | 88.9 mm (3.5 in) |
| 1966 | 107.4 mm (4.2 in) |
| 1967 | 105.4 mm (4.1 in) |
| 1968 | 71.1 mm (2.8 in) |
| 1969 | 148.6 mm (5.9 in) |
| 1970 | 121.9 mm (4.8 in) |
| 1971 | 71.9 mm (2.8 in) |
| 1972 | 132.1 mm (5.2 in) |
| 1973 | 83.1 mm (3.3 in) |
| 1974 | 91.6 mm (3.6 in) |
| 1975 | 122.8 mm (4.8 in) |
| 1976 | 94.1 mm (3.7 in) |
| 1977 | 153.0 mm (6.0 in) |
| 1978 | 179.0 mm (7.0 in) |
| 1979 | 51.7 mm (2.0 in) |
| 1980 | 90.6 mm (3.6 in) |
| 1981 | 71.6 mm (2.8 in) |
| 1982 | 31.8 mm (1.3 in) |
| 1983 | 105.2 mm (4.1 in) |
| 1984 | 127.9 mm (5.0 in) |
| 1985 | 87.0 mm (3.4 in) |
| 1986 | 198.6 mm (7.8 in) |
| 1987 | 102.8 mm (4.0 in) |
| 1988 | 194.8 mm (7.7 in) |
| 1989 | 48.2 mm (1.9 in) |
| 1990 | 95.5 mm (3.8 in) |
| 1991 | 3.5 mm (0.14 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1906 | 54.7 mm (2.2 in) |
| 1907 | 209.3 mm (8.2 in) |
| 1908 | 202.1 mm (8.0 in) |
| 1909 | 76.0 mm (3.0 in) |
| 1934 | 201.3 mm (7.9 in) |
| 1940 | 190.4 mm (7.5 in) |
| 1941 | 75.9 mm (3.0 in) |
| 1942 | 477.3 mm (18.8 in) |
| 1943 | 231.2 mm (9.1 in) |
| 1944 | 99.2 mm (3.9 in) |
| 1945 | 264.6 mm (10.4 in) |
| 1946 | 368.8 mm (14.5 in) |
| 1947 | 129.0 mm (5.1 in) |
| 1948 | 175.8 mm (6.9 in) |
| 1949 | 379.7 mm (14.9 in) |
| 1950 | 294.6 mm (11.6 in) |
| 1951 | 316.5 mm (12.5 in) |
| 1952 | 297.9 mm (11.7 in) |
| 1953 | 218.0 mm (8.6 in) |
| 1954 | 226.0 mm (8.9 in) |
| 1955 | 197.0 mm (7.8 in) |
| 1956 | 317.3 mm (12.5 in) |
| 1957 | 104.5 mm (4.1 in) |
| 1958 | 347.9 mm (13.7 in) |
| 1959 | 121.4 mm (4.8 in) |
| 1960 | 198.6 mm (7.8 in) |
| 1961 | 410.5 mm (16.2 in) |
| 1962 | 290.2 mm (11.4 in) |
| 1963 | 289.6 mm (11.4 in) |
| 1964 | 405.4 mm (16.0 in) |
| 1965 | 221.4 mm (8.7 in) |
| 1966 | 157.2 mm (6.2 in) |
| 1967 | 210.8 mm (8.3 in) |
| 1968 | 100.1 mm (3.9 in) |
| 1969 | 222.3 mm (8.8 in) |
| 1970 | 185.4 mm (7.3 in) |
| 1971 | 116.4 mm (4.6 in) |
| 1972 | 259.3 mm (10.2 in) |
| 1973 | 141.7 mm (5.6 in) |
| 1974 | 138.8 mm (5.5 in) |
| 1975 | 199.0 mm (7.8 in) |
| 1976 | 240.7 mm (9.5 in) |
| 1977 | 88.2 mm (3.5 in) |
| 1978 | 369.0 mm (14.5 in) |
| 1979 | 135.8 mm (5.3 in) |
| 1980 | 109.3 mm (4.3 in) |
| 1981 | 167.0 mm (6.6 in) |
| 1982 | 38.3 mm (1.5 in) |
| 1983 | 73.0 mm (2.9 in) |
| 1984 | 239.2 mm (9.4 in) |
| 1985 | 169.8 mm (6.7 in) |
| 1986 | 122.6 mm (4.8 in) |
| 1987 | 162.7 mm (6.4 in) |
| 1988 | 441.4 mm (17.4 in) |
| 1989 | 60.4 mm (2.4 in) |
| 1990 | 59.7 mm (2.4 in) |
| 1991 | 4.0 mm (0.16 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1906 | 13 days |
| 1907 | 22 days |
| 1908 | 19 days |
| 1909 | 26 days |
| 1934 | 15 days |
| 1940 | 28 days |
| 1941 | 23 days |
| 1942 | 24 days |
| 1943 | 29 days |
| 1944 | 17 days |
| 1945 | 18 days |
| 1946 | 27 days |
| 1947 | 20 days |
| 1948 | 33 days |
| 1949 | 17 days |
| 1950 | 13 days |
| 1951 | 26 days |
| 1952 | 33 days |
| 1953 | 28 days |
| 1954 | 33 days |
| 1955 | 19 days |
| 1956 | 14 days |
| 1957 | 41 days |
| 1958 | 24 days |
| 1959 | 12 days |
| 1960 | 19 days |
| 1961 | 25 days |
| 1962 | 34 days |
| 1963 | 13 days |
| 1964 | 25 days |
| 1965 | 25 days |
| 1966 | 26 days |
| 1967 | 38 days |
| 1968 | 23 days |
| 1969 | 21 days |
| 1970 | 40 days |
| 1971 | 27 days |
| 1972 | 17 days |
| 1973 | 40 days |
| 1974 | 31 days |
| 1975 | 27 days |
| 1976 | 22 days |
| 1977 | 55 days |
| 1978 | 22 days |
| 1979 | 30 days |
| 1980 | 35 days |
| 1981 | 30 days |
| 1982 | 53 days |
| 1983 | 17 days |
| 1984 | 25 days |
| 1985 | 18 days |
| 1986 | 20 days |
| 1987 | 20 days |
| 1988 | 39 days |
| 1989 | 35 days |
| 1990 | 20 days |
| 1991 | 11 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
43 years, 1908 to 1987A day with at least 109.4 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 282.1 mm (11.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 109.4 mm (4.3 in) | |
| 5 years | 153.2 mm (6.0 in) | |
| 10 years | 183.1 mm (7.2 in) | |
| 25 years | 222.1 mm (8.7 in) | |
| 50 years | 251.8 mm (9.9 in) | Longer than the 43 years of record |
| 100 years | 282.1 mm (11.1 in) | Longer than the 43 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, 43 years of values from 1908 to 1987.
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: 357.6 mm (14.1 in) in 1942; 198.6 mm (7.8 in) in 1986; 175.8 mm (6.9 in) in 1949.
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).