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Built 2026-10-19 (19 October 2026)

Whyalla (Tregalana) Threshold Days by Year

4 fixed thresholds counted per year at Whyalla (Tregalana) (ASN00018085): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Whyalla (Tregalana) Thresholds

  • Whyalla (Tregalana): days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1973 with 14.
  • Whyalla (Tregalana): days with 25 mm (0.98 in) or more of precipitation in 27 years, most in 1997 with 6.
  • Whyalla (Tregalana): days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1946 with 2.
  • Whyalla (Tregalana): days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1946 with 1.
  • 4 fixed thresholds have at least one qualifying day at Whyalla (Tregalana).
44 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Whyalla (Tregalana) Days per year at Whyalla (Tregalana) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1973. 0510151939: 21940: 11941: 71942: 71943: 21944: 31945: 51946: 61947: 51948: 41949: 41950: 51951: 61952: 91953: 41954: 81955: 61956: 81957: 41958: 31959: 21960: 71961: 71962: 51963: 91964: 21965: 51966: 71967: 21968: 91969: 61970: 21971: 101972: 51973: 141983: 101984: 71985: 41997: 111999: 52001: 52002: 12004: 12005: 7193919441949195419591964196919832001
Days per year at Whyalla (Tregalana) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1973.
Days with 10 mm (0.39 in) or more of precipitation per year at Whyalla (Tregalana)
YearDaysDecade average
193922
194014.4
194174.4
194274.4
194324.4
194434.4
194554.4
194664.4
194754.4
194844.4
194944.4
195055.5
195165.5
195295.5
195345.5
195485.5
195565.5
195685.5
195745.5
195835.5
195925.5
196075.9
196175.9
196255.9
196395.9
196425.9
196555.9
196675.9
196725.9
196895.9
196965.9
197027.8
1971107.8
197257.8
1973147.8
1983107
198477
198547
1997118
199958
200153.5
200213.5
200413.5
200573.5
First to last qualifying date each year at Whyalla (Tregalana) For each year, a bar from the first to the last day at Whyalla (Tregalana) meeting 10 mm (0.39 in). 1939: 24 February 1939 to 3 November 19391940: 31 March 1940 to 31 March 19401941: 24 January 1941 to 19 November 19411942: 25 April 1942 to 25 December 19421943: 17 February 1943 to 15 June 19431944: 5 February 1944 to 21 December 19441945: 19 June 1945 to 27 December 19451946: 17 January 1946 to 25 December 19461947: 29 January 1947 to 1 October 19471948: 11 April 1948 to 25 December 19481949: 28 February 1949 to 9 October 19491950: 2 February 1950 to 20 December 19501951: 13 May 1951 to 9 October 19511952: 25 January 1952 to 26 November 19521953: 4 February 1953 to 6 November 19531954: 29 January 1954 to 12 December 19541955: 15 February 1955 to 24 November 19551956: 8 April 1956 to 16 November 19561957: 18 June 1957 to 28 December 19571958: 6 March 1958 to 9 September 19581959: 15 February 1959 to 31 March 19591960: 17 January 1960 to 12 November 19601961: 8 February 1961 to 17 November 19611962: 28 January 1962 to 19 October 19621963: 13 January 1963 to 6 December 19631964: 8 April 1964 to 26 September 19641965: 8 May 1965 to 20 August 19651966: 15 February 1966 to 1 December 19661967: 23 February 1967 to 24 February 19671968: 25 January 1968 to 6 November 19681969: 9 February 1969 to 28 October 19691970: 1 January 1970 to 27 September 19701971: 15 March 1971 to 10 December 19711972: 11 January 1972 to 26 December 19721973: 26 January 1973 to 29 December 19731983: 4 March 1983 to 31 December 19831984: 15 April 1984 to 1 November 19841985: 5 August 1985 to 24 November 19851997: 7 January 1997 to 18 December 19971999: 21 March 1999 to 3 December 19992001: 4 January 2001 to 6 December 20012002: 4 January 2002 to 4 January 20022004: 2 June 2004 to 2 June 20042005: 2 February 2005 to 16 December 200519391945195119571963196919842004JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Whyalla (Tregalana) meeting 10 mm (0.39 in).
First to last qualifying date each year at Whyalla (Tregalana)
YearFirst dateLast date
19391939-02-241939-11-03
19401940-03-311940-03-31
19411941-01-241941-11-19
19421942-04-251942-12-25
19431943-02-171943-06-15
19441944-02-051944-12-21
19451945-06-191945-12-27
19461946-01-171946-12-25
19471947-01-291947-10-01
19481948-04-111948-12-25
19491949-02-281949-10-09
19501950-02-021950-12-20
19511951-05-131951-10-09
19521952-01-251952-11-26
19531953-02-041953-11-06
19541954-01-291954-12-12
19551955-02-151955-11-24
19561956-04-081956-11-16
19571957-06-181957-12-28
19581958-03-061958-09-09
19591959-02-151959-03-31
19601960-01-171960-11-12
19611961-02-081961-11-17
19621962-01-281962-10-19
19631963-01-131963-12-06
19641964-04-081964-09-26
19651965-05-081965-08-20
19661966-02-151966-12-01
19671967-02-231967-02-24
19681968-01-251968-11-06
19691969-02-091969-10-28
19701970-01-011970-09-27
19711971-03-151971-12-10
19721972-01-111972-12-26
19731973-01-261973-12-29
19831983-03-041983-12-31
19841984-04-151984-11-01
19851985-08-051985-11-24
19971997-01-071997-12-18
19991999-03-211999-12-03
20012001-01-042001-12-06
20022002-01-042002-01-04
20042004-06-022004-06-02
20052005-02-022005-12-16

Every Fixed Threshold

Fixed thresholds at Whyalla (Tregalana)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain441419737
25 mm (0.98 in): Days with 25 mm or more rain27619971
50 mm (1.97 in): Days with 50 mm or more rain4219461
100 mm (3.94 in): Days with 100 mm or more rain2119461

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Whyalla (Tregalana) 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).