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

Chatham Islands AWS Threshold Days by Year (NZ000939870)

4 fixed thresholds counted per year at Chatham Islands AWS (NZ000939870): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatham Islands AWS Thresholds

  • Chatham Islands AWS: nights with a minimum temperature at or below 0 C (32 F) in 8 years, most in 1963 with 3.
  • Chatham Islands AWS: days with 10 mm (0.39 in) or more of precipitation in 1 years, most in 2004 with 25.
  • Chatham Islands AWS: days with 25 mm (0.98 in) or more of precipitation in 1 years, most in 2004 with 7.
  • Chatham Islands AWS: days with 50 mm (1.97 in) or more of precipitation in 1 years, most in 2004 with 1.
  • 4 fixed thresholds have at least one qualifying day at Chatham Islands AWS.
8 years with a qualifying day
Nights at or below 0 C (32 F) per year at Chatham Islands AWS Days per year at Chatham Islands AWS with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 3 in 1963. 01231960: 11963: 31967: 11972: 21974: 11975: 21984: 11992: 119601963196719721974197519841992
Days per year at Chatham Islands AWS with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 3 in 1963.
Nights at or below 0 C (32 F) per year at Chatham Islands AWS
YearDaysDecade average
196011.7
196331.7
196711.7
197221.7
197411.7
197521.7
198411
199211
First to last qualifying date each year at Chatham Islands AWS For each year, a bar from the first to the last day at Chatham Islands AWS meeting 0 C (32 F). 1960: 27 July 1960 to 27 July 19601963: 12 August 1963 to 14 August 19631967: 2 September 1967 to 2 September 19671972: 18 June 1972 to 21 June 19721974: 28 August 1974 to 28 August 19741975: 22 June 1975 to 2 August 19751984: 7 August 1984 to 7 August 19841992: 13 August 1992 to 13 August 199219601963196719721974197519841992JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chatham Islands AWS meeting 0 C (32 F).
First to last qualifying date each year at Chatham Islands AWS
YearFirst dateLast date
19601960-07-271960-07-27
19631963-08-121963-08-14
19671967-09-021967-09-02
19721972-06-181972-06-21
19741974-08-281974-08-28
19751975-06-221975-08-02
19841984-08-071984-08-07
19921992-08-131992-08-13

Every Fixed Threshold

Fixed thresholds at Chatham Islands AWS
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Frost days (min8319631
10 mm (0.39 in): Days with 10 mm or more rain125200425
25 mm (0.98 in): Days with 25 mm or more rain1720047
50 mm (1.97 in): Days with 50 mm or more rain1120041

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

  • Data for Chatham Islands AWS 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).