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Built 2026-10-19 (19 October 2026)

Altona Threshold Days by Year (ASN00012112)

3 fixed thresholds counted per year at Altona (ASN00012112): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Altona Thresholds

  • Altona: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 2000 with 13.
  • Altona: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1985 with 4.
  • Altona: days with 50 mm (1.97 in) or more of precipitation in 3 years, most in 1974 with 2.
  • 3 fixed thresholds have at least one qualifying day at Altona.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Altona Days per year at Altona with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 2000. 0510151957: 61958: 71959: 31960: 81961: 41962: 31963: 81964: 21965: 61968: 91969: 21970: 71971: 41972: 21973: 101974: 61975: 61977: 21978: 51979: 31980: 41981: 21982: 41983: 41985: 101986: 41987: 22000: 131957196019631968197119741978198119852000
Days per year at Altona with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 2000.
Days with 10 mm (0.39 in) or more of precipitation per year at Altona
YearDaysDecade average
195765.3
195875.3
195935.3
196085.3
196145.3
196235.3
196385.3
196425.3
196565.3
196895.3
196925.3
197075
197145
197225
1973105
197465
197565
197725
197855
197935
198044.3
198124.3
198244.3
198344.3
1985104.3
198644.3
198724.3
20001313
First to last qualifying date each year at Altona For each year, a bar from the first to the last day at Altona meeting 10 mm (0.39 in). 1957: 20 January 1957 to 7 December 19571958: 22 January 1958 to 23 December 19581959: 11 April 1959 to 10 June 19591960: 31 January 1960 to 9 September 19601961: 26 January 1961 to 9 June 19611962: 16 February 1962 to 29 May 19621963: 28 January 1963 to 16 December 19631964: 12 April 1964 to 8 November 19641965: 7 June 1965 to 27 November 19651968: 31 January 1968 to 25 June 19681969: 19 February 1969 to 19 May 19691970: 28 January 1970 to 2 December 19701971: 4 June 1971 to 30 July 19711972: 16 June 1972 to 14 August 19721973: 22 February 1973 to 21 October 19731974: 2 March 1974 to 26 September 19741975: 3 February 1975 to 26 September 19751977: 21 June 1977 to 25 December 19771978: 5 February 1978 to 18 December 19781979: 4 January 1979 to 11 April 19791980: 18 May 1980 to 22 November 19801981: 7 November 1981 to 8 December 19811982: 8 March 1982 to 12 October 19821983: 30 March 1983 to 31 December 19831985: 31 January 1985 to 20 November 19851986: 8 January 1986 to 6 July 19861987: 4 June 1987 to 26 August 19872000: 22 January 2000 to 14 December 20001957196119651971197519801985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Altona meeting 10 mm (0.39 in).
First to last qualifying date each year at Altona
YearFirst dateLast date
19571957-01-201957-12-07
19581958-01-221958-12-23
19591959-04-111959-06-10
19601960-01-311960-09-09
19611961-01-261961-06-09
19621962-02-161962-05-29
19631963-01-281963-12-16
19641964-04-121964-11-08
19651965-06-071965-11-27
19681968-01-311968-06-25
19691969-02-191969-05-19
19701970-01-281970-12-02
19711971-06-041971-07-30
19721972-06-161972-08-14
19731973-02-221973-10-21
19741974-03-021974-09-26
19751975-02-031975-09-26
19771977-06-211977-12-25
19781978-02-051978-12-18
19791979-01-041979-04-11
19801980-05-181980-11-22
19811981-11-071981-12-08
19821982-03-081982-10-12
19831983-03-301983-12-31
19851985-01-311985-11-20
19861986-01-081986-07-06
19871987-06-041987-08-26
20002000-01-222000-12-14

Every Fixed Threshold

Fixed thresholds at Altona
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2813200013
25 mm (0.98 in): Days with 25 mm or more rain17419853
50 mm (1.97 in): Days with 50 mm or more rain3219741

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

  • Data for Altona 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).