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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Portsea Threshold Days by Year (ASN00086093)

3 fixed thresholds counted per year at Portsea (ASN00086093): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Portsea Thresholds

  • Portsea: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1951 with 26.
  • Portsea: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1939 with 6.
  • Portsea: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1949 with 2.
  • 3 fixed thresholds have at least one qualifying day at Portsea.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Portsea Days per year at Portsea with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1951. 01020301937: 131938: 101939: 211940: 121941: 191942: 171943: 111946: 241947: 211948: 141949: 191950: 201951: 261952: 251954: 171955: 231956: 201957: 171958: 171959: 181960: 191961: 121962: 191963: 171964: 261965: 181966: 231967: 111937194019431948195119551958196119641967
Days per year at Portsea with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1951.
Days with 10 mm (0.39 in) or more of precipitation per year at Portsea
YearDaysDecade average
19371314.7
19381014.7
19392114.7
19401217.1
19411917.1
19421717.1
19431117.1
19462417.1
19472117.1
19481417.1
19491917.1
19502020.3
19512620.3
19522520.3
19541720.3
19552320.3
19562020.3
19571720.3
19581720.3
19591820.3
19601918.1
19611218.1
19621918.1
19631718.1
19642618.1
19651818.1
19662318.1
19671118.1
First to last qualifying date each year at Portsea For each year, a bar from the first to the last day at Portsea meeting 10 mm (0.39 in). 1937: 24 January 1937 to 5 November 19371938: 14 January 1938 to 3 November 19381939: 16 February 1939 to 24 November 19391940: 4 January 1940 to 19 December 19401941: 24 January 1941 to 4 November 19411942: 18 January 1942 to 17 December 19421943: 2 January 1943 to 17 November 19431946: 17 January 1946 to 29 December 19461947: 4 February 1947 to 23 December 19471948: 28 March 1948 to 28 December 19481949: 20 February 1949 to 22 November 19491950: 14 January 1950 to 19 November 19501951: 7 January 1951 to 15 December 19511952: 11 February 1952 to 11 December 19521954: 22 March 1954 to 12 December 19541955: 10 February 1955 to 31 December 19551956: 13 January 1956 to 27 December 19561957: 7 February 1957 to 26 December 19571958: 1 February 1958 to 12 December 19581959: 14 February 1959 to 27 December 19591960: 9 January 1960 to 21 November 19601961: 2 March 1961 to 15 December 19611962: 20 January 1962 to 11 November 19621963: 14 January 1963 to 24 October 19631964: 15 January 1964 to 26 December 19641965: 5 April 1965 to 12 December 19651966: 13 January 1966 to 29 December 19661967: 23 March 1967 to 13 December 19671937194119471951195619601964JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Portsea meeting 10 mm (0.39 in).
First to last qualifying date each year at Portsea
YearFirst dateLast date
19371937-01-241937-11-05
19381938-01-141938-11-03
19391939-02-161939-11-24
19401940-01-041940-12-19
19411941-01-241941-11-04
19421942-01-181942-12-17
19431943-01-021943-11-17
19461946-01-171946-12-29
19471947-02-041947-12-23
19481948-03-281948-12-28
19491949-02-201949-11-22
19501950-01-141950-11-19
19511951-01-071951-12-15
19521952-02-111952-12-11
19541954-03-221954-12-12
19551955-02-101955-12-31
19561956-01-131956-12-27
19571957-02-071957-12-26
19581958-02-011958-12-12
19591959-02-141959-12-27
19601960-01-091960-11-21
19611961-03-021961-12-15
19621962-01-201962-11-11
19631963-01-141963-10-24
19641964-01-151964-12-26
19651965-04-051965-12-12
19661966-01-131966-12-29
19671967-03-231967-12-13

Every Fixed Threshold

Fixed thresholds at Portsea
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2826195111
25 mm (0.98 in): Days with 25 mm or more rain25619396
50 mm (1.97 in): Days with 50 mm or more rain6219491

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

  • Data for Portsea 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).