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Built 2026-10-19 (19 October 2026)

Hamilton Threshold Days by Year (ASN00090044)

12 fixed thresholds counted per year at Hamilton (ASN00090044): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton Thresholds

  • Hamilton: days with 10 mm (0.39 in) or more of precipitation in 100 years, most in 1952 with 36.
  • Hamilton: days with 25 mm (0.98 in) or more of precipitation in 80 years, most in 1893 with 6.
  • Hamilton: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1961 with 43.
  • Hamilton: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 1968 with 21.
  • 12 fixed thresholds have at least one qualifying day at Hamilton.
23 years with a qualifying day
Days at or above 30 C (86 F) per year at Hamilton Days per year at Hamilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 43 in 1961. 02040601957: 211958: 151959: 251960: 321961: 431962: 321963: 261964: 121965: 291966: 291967: 361968: 351969: 291970: 261971: 301972: 321973: 301974: 401975: 311976: 291977: 381978: 251979: 2919571960196319661969197219751978
Days per year at Hamilton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 43 in 1961.
Days at or above 30 C (86 F) per year at Hamilton
YearDaysDecade average
19572120.3
19581520.3
19592520.3
19603230.3
19614330.3
19623230.3
19632630.3
19641230.3
19652930.3
19662930.3
19673630.3
19683530.3
19692930.3
19702631
19713031
19723231
19733031
19744031
19753131
19762931
19773831
19782531
19792931
First to last qualifying date each year at Hamilton For each year, a bar from the first to the last day at Hamilton meeting 30 C (86 F). 1957: 2 January 1957 to 28 December 19571958: 9 January 1958 to 23 December 19581959: 3 January 1959 to 30 December 19591960: 6 January 1960 to 30 December 19601961: 6 January 1961 to 27 December 19611962: 6 January 1962 to 31 December 19621963: 8 January 1963 to 27 December 19631964: 5 January 1964 to 18 March 19641965: 8 January 1965 to 28 December 19651966: 8 January 1966 to 25 December 19661967: 5 January 1967 to 27 December 19671968: 6 January 1968 to 22 December 19681969: 7 January 1969 to 28 December 19691970: 8 January 1970 to 26 December 19701971: 6 January 1971 to 25 December 19711972: 25 January 1972 to 29 December 19721973: 1 January 1973 to 29 December 19731974: 3 January 1974 to 23 December 19741975: 1 January 1975 to 27 December 19751976: 3 January 1976 to 31 December 19761977: 6 January 1977 to 31 December 19771978: 1 January 1978 to 24 December 19781979: 1 January 1979 to 29 December 197919571960196319661969197219751978JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hamilton meeting 30 C (86 F).
First to last qualifying date each year at Hamilton
YearFirst dateLast date
19571957-01-021957-12-28
19581958-01-091958-12-23
19591959-01-031959-12-30
19601960-01-061960-12-30
19611961-01-061961-12-27
19621962-01-061962-12-31
19631963-01-081963-12-27
19641964-01-051964-03-18
19651965-01-081965-12-28
19661966-01-081966-12-25
19671967-01-051967-12-27
19681968-01-061968-12-22
19691969-01-071969-12-28
19701970-01-081970-12-26
19711971-01-061971-12-25
19721972-01-251972-12-29
19731973-01-011973-12-29
19741974-01-031974-12-23
19751975-01-011975-12-27
19761976-01-031976-12-31
19771977-01-061977-12-31
19781978-01-011978-12-24
19791979-01-011979-12-29

Every Fixed Threshold

Fixed thresholds at Hamilton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2343196129
35 C (95 F): Days232119688
40 C (104 F): Days6319591
90 F (32.2 C): Days2329197420
100 F (37.8 C): Days20919683
0 C (32 F): Frost days (min221419734
20 C (68 F): Tropical nights (min211019602
25 C (77 F): Days with min4119591
10 mm (0.39 in): Days with 10 mm or more rain10036195211
25 mm (0.98 in): Days with 25 mm or more rain80618932
50 mm (1.97 in): Days with 50 mm or more rain18319301
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 1957.

Download the Data

  • Data for Hamilton 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 (2026-10-17).