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Built 2026-10-17 (17 October 2026)

Waiopai Rch 256 Threshold Days by Year

5 fixed thresholds counted per year at Waiopai Rch 256 (USC00519765): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Waiopai Rch 256 Thresholds

  • Waiopai Rch 256: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1927 with 26.
  • Waiopai Rch 256: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1923 with 17.
  • Waiopai Rch 256: days with 50 mm (1.97 in) or more of precipitation in 30 years, most in 1914 with 10.
  • Waiopai Rch 256: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1914 with 3.
  • 5 fixed thresholds have at least one qualifying day at Waiopai Rch 256.
35 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Waiopai Rch 256 Days per year at Waiopai Rch 256 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1927. 01020301914: 181915: 111919: 91920: 121921: 111922: 171923: 221924: 151925: 141926: 101927: 261928: 141929: 201930: 131931: 71932: 261933: 181934: 161935: 171936: 151937: 181938: 201939: 191940: 201941: 101942: 121943: 161944: 161945: 161946: 191947: 111948: 141987: 12010: 12025: 2191419211925192919331937194119451987
Days per year at Waiopai Rch 256 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 26 in 1927.
Days with 10 mm (0.39 in) or more of precipitation per year at Waiopai Rch 256
YearDaysDecade average
19141812.7
19151112.7
1919912.7
19201216.1
19211116.1
19221716.1
19232216.1
19241516.1
19251416.1
19261016.1
19272616.1
19281416.1
19292016.1
19301316.9
1931716.9
19322616.9
19331816.9
19341616.9
19351716.9
19361516.9
19371816.9
19382016.9
19391916.9
19402014.9
19411014.9
19421214.9
19431614.9
19441614.9
19451614.9
19461914.9
19471114.9
19481414.9
198711
201011
202522
First to last qualifying date each year at Waiopai Rch 256 For each year, a bar from the first to the last day at Waiopai Rch 256 meeting 10 mm (0.39 in). 1914: 3 January 1914 to 26 December 19141915: 24 March 1915 to 28 December 19151919: 14 March 1919 to 16 December 19191920: 11 January 1920 to 25 December 19201921: 13 January 1921 to 22 December 19211922: 9 January 1922 to 8 November 19221923: 13 January 1923 to 24 December 19231924: 16 February 1924 to 22 December 19241925: 10 February 1925 to 31 December 19251926: 31 March 1926 to 24 December 19261927: 11 January 1927 to 27 December 19271928: 14 January 1928 to 27 December 19281929: 18 January 1929 to 26 December 19291930: 4 January 1930 to 8 December 19301931: 27 February 1931 to 9 November 19311932: 1 January 1932 to 30 December 19321933: 3 January 1933 to 24 December 19331934: 13 January 1934 to 26 December 19341935: 13 January 1935 to 15 November 19351936: 16 January 1936 to 31 December 19361937: 11 January 1937 to 26 December 19371938: 4 January 1938 to 24 December 19381939: 14 January 1939 to 30 December 19391940: 8 January 1940 to 29 December 19401941: 4 January 1941 to 24 October 19411942: 18 February 1942 to 14 December 19421943: 2 January 1943 to 7 December 19431944: 18 January 1944 to 27 December 19441945: 5 January 1945 to 21 December 19451946: 9 January 1946 to 30 December 19461947: 22 March 1947 to 18 December 19471948: 27 January 1948 to 24 December 19481987: 18 February 1987 to 18 February 19872010: 31 December 2010 to 31 December 20102025: 23 April 2025 to 30 April 20251914192219271932193719421947JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Waiopai Rch 256 meeting 10 mm (0.39 in).
First to last qualifying date each year at Waiopai Rch 256
YearFirst dateLast date
19141914-01-031914-12-26
19151915-03-241915-12-28
19191919-03-141919-12-16
19201920-01-111920-12-25
19211921-01-131921-12-22
19221922-01-091922-11-08
19231923-01-131923-12-24
19241924-02-161924-12-22
19251925-02-101925-12-31
19261926-03-311926-12-24
19271927-01-111927-12-27
19281928-01-141928-12-27
19291929-01-181929-12-26
19301930-01-041930-12-08
19311931-02-271931-11-09
19321932-01-011932-12-30
19331933-01-031933-12-24
19341934-01-131934-12-26
19351935-01-131935-11-15
19361936-01-161936-12-31
19371937-01-111937-12-26
19381938-01-041938-12-24
19391939-01-141939-12-30
19401940-01-081940-12-29
19411941-01-041941-10-24
19421942-02-181942-12-14
19431943-01-021943-12-07
19441944-01-181944-12-27
19451945-01-051945-12-21
19461946-01-091946-12-30
19471947-03-221947-12-18
19481948-01-271948-12-24
19871987-02-181987-02-18
20102010-12-312010-12-31
20252025-04-232025-04-30

Every Fixed Threshold

Fixed thresholds at Waiopai Rch 256
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain352619272
25 mm (0.98 in): Days with 25 mm or more rain341719231
50 mm (1.97 in): Days with 50 mm or more rain301019144
100 mm (3.94 in): Days with 100 mm or more rain14319142
200 mm (7.87 in): Days with 200 mm or more rain3219151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1914.

Download the Data

  • Data for Waiopai Rch 256 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 (2025-12-31).