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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Blacktown Threshold Days by Year

4 fixed thresholds counted per year at Blacktown (ASN00067059): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blacktown Thresholds

  • Blacktown: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1969 with 40.
  • Blacktown: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1988 with 14.
  • Blacktown: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 1988 with 6.
  • Blacktown: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 1988 with 2.
  • 4 fixed thresholds have at least one qualifying day at Blacktown.
29 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Blacktown Days per year at Blacktown with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1969. 0102030401964: 221965: 151966: 201967: 271968: 131969: 401970: 261971: 191972: 211973: 291974: 281975: 201976: 331977: 181978: 311979: 131980: 171981: 251982: 121983: 181984: 291985: 261986: 201987: 261988: 361989: 261990: 311991: 161992: 241964196719701973197619791982198519881991
Days per year at Blacktown with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1969.
Days with 10 mm (0.39 in) or more of precipitation per year at Blacktown
YearDaysDecade average
19642222.8
19651522.8
19662022.8
19672722.8
19681322.8
19694022.8
19702623.8
19711923.8
19722123.8
19732923.8
19742823.8
19752023.8
19763323.8
19771823.8
19783123.8
19791323.8
19801723.5
19812523.5
19821223.5
19831823.5
19842923.5
19852623.5
19862023.5
19872623.5
19883623.5
19892623.5
19903123.7
19911623.7
19922423.7
First to last qualifying date each year at Blacktown For each year, a bar from the first to the last day at Blacktown meeting 10 mm (0.39 in). 1964: 8 February 1964 to 23 December 19641965: 11 April 1965 to 15 December 19651966: 17 January 1966 to 7 December 19661967: 3 January 1967 to 8 November 19671968: 5 January 1968 to 5 December 19681969: 2 January 1969 to 23 December 19691970: 12 January 1970 to 30 December 19701971: 20 January 1971 to 26 December 19711972: 13 January 1972 to 27 December 19721973: 28 January 1973 to 28 December 19731974: 10 January 1974 to 2 November 19741975: 3 January 1975 to 16 November 19751976: 10 January 1976 to 16 December 19761977: 22 January 1977 to 26 December 19771978: 5 January 1978 to 29 December 19781979: 24 January 1979 to 24 November 19791980: 2 January 1980 to 6 December 19801981: 8 January 1981 to 24 December 19811982: 17 January 1982 to 10 October 19821983: 27 January 1983 to 7 December 19831984: 3 January 1984 to 30 December 19841985: 8 February 1985 to 17 December 19851986: 5 January 1986 to 27 November 19861987: 1 January 1987 to 29 December 19871988: 2 January 1988 to 27 December 19881989: 2 January 1989 to 10 December 19891990: 8 January 1990 to 9 December 19901991: 19 January 1991 to 22 December 19911992: 4 January 1992 to 23 December 199219641968197219761980198419881992JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blacktown meeting 10 mm (0.39 in).
First to last qualifying date each year at Blacktown
YearFirst dateLast date
19641964-02-081964-12-23
19651965-04-111965-12-15
19661966-01-171966-12-07
19671967-01-031967-11-08
19681968-01-051968-12-05
19691969-01-021969-12-23
19701970-01-121970-12-30
19711971-01-201971-12-26
19721972-01-131972-12-27
19731973-01-281973-12-28
19741974-01-101974-11-02
19751975-01-031975-11-16
19761976-01-101976-12-16
19771977-01-221977-12-26
19781978-01-051978-12-29
19791979-01-241979-11-24
19801980-01-021980-12-06
19811981-01-081981-12-24
19821982-01-171982-10-10
19831983-01-271983-12-07
19841984-01-031984-12-30
19851985-02-081985-12-17
19861986-01-051986-11-27
19871987-01-011987-12-29
19881988-01-021988-12-27
19891989-01-021989-12-10
19901990-01-081990-12-09
19911991-01-191991-12-22
19921992-01-041992-12-23

Every Fixed Threshold

Fixed thresholds at Blacktown
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2940196924
25 mm (0.98 in): Days with 25 mm or more rain291419885
50 mm (1.97 in): Days with 50 mm or more rain25619882
100 mm (3.94 in): Days with 100 mm or more rain8219882

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

  • Data for Blacktown 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).