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Built 2026-10-17 (17 October 2026)

Hamilton Research Station Threshold Days by Year

12 fixed thresholds counted per year at Hamilton Research Station (ASN00090103): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hamilton Research Station Thresholds

  • Hamilton Research Station: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1964 with 29.
  • Hamilton Research Station: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1982 with 41.
  • Hamilton Research Station: days with a maximum temperature at or above 35 C (95 F) in 32 years, most in 1968 with 18.
  • Hamilton Research Station: days with a maximum temperature at or above 90 F (32.2 C) in 32 years, most in 1968 with 27.
  • 12 fixed thresholds have at least one qualifying day at Hamilton Research Station.
32 years with a qualifying day
Days at or above 30 C (86 F) per year at Hamilton Research Station Days per year at Hamilton Research Station with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1982. 02040601968: 341969: 281970: 211971: 251972: 241973: 271974: 341975: 191976: 211977: 331978: 191979: 251980: 271981: 311982: 411983: 291984: 171985: 231986: 151987: 241988: 321989: 341990: 231991: 151992: 141993: 201994: 191995: 211996: 171997: 331998: 331999: 2719681972197619801984198819921996
Days per year at Hamilton Research Station with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1982.
Days at or above 30 C (86 F) per year at Hamilton Research Station
YearDaysDecade average
19683431
19692831
19702124.8
19712524.8
19722424.8
19732724.8
19743424.8
19751924.8
19762124.8
19773324.8
19781924.8
19792524.8
19802727.3
19813127.3
19824127.3
19832927.3
19841727.3
19852327.3
19861527.3
19872427.3
19883227.3
19893427.3
19902322.2
19911522.2
19921422.2
19932022.2
19941922.2
19952122.2
19961722.2
19973322.2
19983322.2
19992722.2
First to last qualifying date each year at Hamilton Research Station For each year, a bar from the first to the last day at Hamilton Research Station meeting 30 C (86 F). 1968: 6 January 1968 to 22 December 19681969: 7 January 1969 to 29 December 19691970: 8 January 1970 to 26 December 19701971: 6 January 1971 to 29 March 19711972: 26 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: 4 January 1979 to 29 December 19791980: 10 January 1980 to 31 December 19801981: 1 January 1981 to 31 December 19811982: 10 January 1982 to 31 December 19821983: 7 January 1983 to 29 December 19831984: 5 January 1984 to 29 December 19841985: 12 January 1985 to 13 April 19851986: 14 January 1986 to 30 December 19861987: 24 January 1987 to 31 December 19871988: 6 January 1988 to 24 December 19881989: 2 January 1989 to 31 December 19891990: 2 January 1990 to 31 December 19901991: 1 January 1991 to 24 November 19911992: 19 January 1992 to 11 December 19921993: 1 January 1993 to 10 December 19931994: 12 January 1994 to 18 December 19941995: 3 January 1995 to 17 December 19951996: 13 January 1996 to 21 December 19961997: 4 January 1997 to 31 December 19971998: 1 January 1998 to 25 December 19981999: 1 January 1999 to 15 December 199919681972197619801984198819921996JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hamilton Research Station meeting 30 C (86 F).
First to last qualifying date each year at Hamilton Research Station
YearFirst dateLast date
19681968-01-061968-12-22
19691969-01-071969-12-29
19701970-01-081970-12-26
19711971-01-061971-03-29
19721972-01-261972-12-29
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
19791979-01-041979-12-29
19801980-01-101980-12-31
19811981-01-011981-12-31
19821982-01-101982-12-31
19831983-01-071983-12-29
19841984-01-051984-12-29
19851985-01-121985-04-13
19861986-01-141986-12-30
19871987-01-241987-12-31
19881988-01-061988-12-24
19891989-01-021989-12-31
19901990-01-021990-12-31
19911991-01-011991-11-24
19921992-01-191992-12-11
19931993-01-011993-12-10
19941994-01-121994-12-18
19951995-01-031995-12-17
19961996-01-131996-12-21
19971997-01-041997-12-31
19981998-01-011998-12-25
19991999-01-011999-12-15

Every Fixed Threshold

Fixed thresholds at Hamilton Research Station
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3241198227
35 C (95 F): Days321819688
40 C (104 F): Days13319822
90 F (32.2 C): Days3227196817
100 F (37.8 C): Days28819821
110 F (43.3 C): Days1119821
0 C (32 F): Frost days (min3132198213
20 C (68 F): Tropical nights (min22519681
25 C (77 F): Days with min3219821
10 mm (0.39 in): Days with 10 mm or more rain3629196417
25 mm (0.98 in): Days with 25 mm or more rain27619731
50 mm (1.97 in): Days with 50 mm or more rain4119761

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Hamilton Research Station 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).