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

Hamilton Threshold Days by Year (USC00013644)

13 fixed thresholds counted per year at Hamilton (USC00013644): 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 22 years, most in 1961 with 52.
  • Hamilton: days with 25 mm (0.98 in) or more of precipitation in 22 years, most in 1961 with 24.
  • Hamilton: days with 50 mm (1.97 in) or more of precipitation in 21 years, most in 1961 with 7.
  • Hamilton: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1951 with 2.
  • 13 fixed thresholds have at least one qualifying day at Hamilton.
5 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 101 in 1959. 0501001501957: 861958: 721959: 1011960: 991961: 7819571958195919601961
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 101 in 1959.
Days at or above 30 C (86 F) per year at Hamilton
YearDaysDecade average
19578686.3
19587286.3
195910186.3
19609988.5
19617888.5
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: 30 April 1957 to 13 September 19571958: 14 May 1958 to 28 September 19581959: 2 May 1959 to 6 October 19591960: 18 May 1960 to 5 October 19601961: 22 May 1961 to 31 October 196119571958195919601961JanFebMarAprMayJunJulAugSepOctNovDec
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
19571957-04-301957-09-13
19581958-05-141958-09-28
19591959-05-021959-10-06
19601960-05-181960-10-05
19611961-05-221961-10-31

Every Fixed Threshold

Fixed thresholds at Hamilton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days5101195978
35 C (95 F): Days51919601
90 F (32.2 C): Days565196028
0 C (32 F): Ice days (max5819583
0 C (32 F): Frost days (min599196072
-10 C (14 F): Days with min51619586
20 C (68 F): Tropical nights (min557195711
10 mm (0.39 in): Days with 10 mm or more rain2252196152
25 mm (0.98 in): Days with 25 mm or more rain2224196124
50 mm (1.97 in): Days with 50 mm or more rain21719617
100 mm (3.94 in): Days with 100 mm or more rain6219511
10 cm (3.9 in): Days with 10 cm or more snowfall4119401
25 cm (9.8 in): Days with 25 cm or more snowfall1119581

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 (2025-12-31).