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Built 2026-10-17 (17 October 2026)

Mount Isa Post Office Threshold Days by Year

12 fixed thresholds counted per year at Mount Isa Post Office (ASN00029125): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mount Isa Post Office Thresholds

  • Mount Isa Post Office: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1950 with 30.
  • Mount Isa Post Office: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1950 with 11.
  • Mount Isa Post Office: days with 50 mm (1.97 in) or more of precipitation in 27 years, most in 1936 with 4.
  • Mount Isa Post Office: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 1965 with 254.
  • 12 fixed thresholds have at least one qualifying day at Mount Isa Post Office.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Mount Isa Post Office Days per year at Mount Isa Post Office with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 254 in 1965. 01002003001957: 2471959: 2281960: 2441961: 2431962: 2381963: 2511964: 2471965: 2541966: 2121968: 2301969: 233195719601962196419661969
Days per year at Mount Isa Post Office with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 254 in 1965.
Days at or above 30 C (86 F) per year at Mount Isa Post Office
YearDaysDecade average
1957247237.5
1959228237.5
1960244239.1
1961243239.1
1962238239.1
1963251239.1
1964247239.1
1965254239.1
1966212239.1
1968230239.1
1969233239.1
First to last qualifying date each year at Mount Isa Post Office For each year, a bar from the first to the last day at Mount Isa Post Office meeting 30 C (86 F). 1957: 1 January 1957 to 30 December 19571959: 3 January 1959 to 31 December 19591960: 1 January 1960 to 31 December 19601961: 1 January 1961 to 31 December 19611962: 1 January 1962 to 30 December 19621963: 1 January 1963 to 31 December 19631964: 1 January 1964 to 31 December 19641965: 1 January 1965 to 31 December 19651966: 1 January 1966 to 30 December 19661968: 2 January 1968 to 30 December 19681969: 1 January 1969 to 31 December 1969195719601962196419661969JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Mount Isa Post Office meeting 30 C (86 F).
First to last qualifying date each year at Mount Isa Post Office
YearFirst dateLast date
19571957-01-011957-12-30
19591959-01-031959-12-31
19601960-01-011960-12-31
19611961-01-011961-12-31
19621962-01-011962-12-30
19631963-01-011963-12-31
19641964-01-011964-12-31
19651965-01-011965-12-31
19661966-01-011966-12-30
19681968-01-021968-12-30
19691969-01-011969-12-31

Every Fixed Threshold

Fixed thresholds at Mount Isa Post Office
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days112541965233
35 C (95 F): Days111671961136
40 C (104 F): Days1142195730
90 F (32.2 C): Days112191961195
100 F (37.8 C): Days1187195771
110 F (43.3 C): Days4419634
20 C (68 F): Tropical nights (min111801964166
25 C (77 F): Days with min1165196965
10 mm (0.39 in): Days with 10 mm or more rain433019502
25 mm (0.98 in): Days with 25 mm or more rain421119503
50 mm (1.97 in): Days with 50 mm or more rain27419362
100 mm (3.94 in): Days with 100 mm or more rain4119361

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 Mount Isa Post Office 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).