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Built 2026-10-19 (19 October 2026)

Chatham Threshold Days by Year (USC00281590)

5 fixed thresholds counted per year at Chatham (USC00281590): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatham Thresholds

  • Chatham: days with 10 mm (0.39 in) or more of precipitation in 53 years, most in 1911 with 51.
  • Chatham: days with 25 mm (0.98 in) or more of precipitation in 53 years, most in 1942 with 22.
  • Chatham: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1924 with 6.
  • Chatham: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1924 with 2.
  • 5 fixed thresholds have at least one qualifying day at Chatham.
53 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Chatham Days per year at Chatham with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1911. 02040601904: 331905: 381906: 381907: 451908: 401909: 381910: 321911: 511912: 481913: 421914: 401915: 371916: 311917: 291920: 431921: 311922: 451923: 361924: 321925: 451926: 451927: 451928: 421929: 451930: 361932: 481933: 451934: 401935: 281936: 361937: 431938: 371939: 361940: 481941: 301942: 491943: 371944: 371945: 481946: 331948: 431950: 361952: 471953: 441954: 361955: 251956: 441957: 331958: 401959: 441960: 381961: 381962: 32190419101916192419301937194319521958
Days per year at Chatham with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1911.
Days with 10 mm (0.39 in) or more of precipitation per year at Chatham
YearDaysDecade average
19043338.7
19053838.7
19063838.7
19074538.7
19084038.7
19093838.7
19103238.8
19115138.8
19124838.8
19134238.8
19144038.8
19153738.8
19163138.8
19172938.8
19204340.9
19213140.9
19224540.9
19233640.9
19243240.9
19254540.9
19264540.9
19274540.9
19284240.9
19294540.9
19303638.8
19324838.8
19334538.8
19344038.8
19352838.8
19363638.8
19374338.8
19383738.8
19393638.8
19404840.6
19413040.6
19424940.6
19433740.6
19443740.6
19454840.6
19463340.6
19484340.6
19503638.8
19524738.8
19534438.8
19543638.8
19552538.8
19564438.8
19573338.8
19584038.8
19594438.8
19603836
19613836
19623236
First to last qualifying date each year at Chatham For each year, a bar from the first to the last day at Chatham meeting 10 mm (0.39 in). 1904: 14 January 1904 to 13 December 19041905: 4 January 1905 to 29 December 19051906: 4 January 1906 to 21 December 19061907: 1 January 1907 to 31 December 19071908: 8 January 1908 to 18 December 19081909: 6 January 1909 to 27 December 19091910: 7 January 1910 to 24 December 19101911: 2 January 1911 to 27 December 19111912: 1 January 1912 to 31 December 19121913: 3 January 1913 to 26 December 19131914: 4 January 1914 to 30 December 19141915: 7 January 1915 to 19 December 19151916: 25 February 1916 to 28 December 19161917: 5 January 1917 to 14 December 19171920: 8 January 1920 to 26 December 19201921: 15 January 1921 to 24 December 19211922: 12 January 1922 to 29 December 19221923: 1 January 1923 to 31 December 19231924: 3 January 1924 to 25 December 19241925: 3 January 1925 to 22 December 19251926: 19 January 1926 to 29 December 19261927: 16 January 1927 to 30 December 19271928: 1 January 1928 to 28 December 19281929: 2 January 1929 to 19 December 19291930: 4 January 1930 to 28 December 19301932: 2 January 1932 to 28 December 19321933: 10 January 1933 to 27 December 19331934: 6 January 1934 to 27 December 19341935: 1 January 1935 to 30 December 19351936: 3 January 1936 to 20 December 19361937: 1 January 1937 to 25 December 19371938: 7 January 1938 to 27 December 19381939: 6 January 1939 to 21 December 19391940: 15 January 1940 to 29 December 19401941: 17 January 1941 to 25 December 19411942: 2 January 1942 to 31 December 19421943: 19 January 1943 to 27 December 19431944: 4 January 1944 to 28 December 19441945: 2 January 1945 to 30 December 19451946: 10 January 1946 to 30 December 19461948: 2 January 1948 to 31 December 19481950: 11 January 1950 to 30 December 19501952: 3 January 1952 to 22 December 19521953: 3 January 1953 to 14 December 19531954: 12 January 1954 to 30 December 19541955: 3 February 1955 to 17 November 19551956: 12 January 1956 to 23 December 19561957: 23 January 1957 to 27 December 19571958: 15 January 1958 to 4 December 19581959: 2 January 1959 to 29 December 19591960: 3 January 1960 to 29 December 19601961: 1 January 1961 to 19 December 19611962: 7 January 1962 to 22 December 196219041911192019271935194219521959JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Chatham meeting 10 mm (0.39 in).
First to last qualifying date each year at Chatham
YearFirst dateLast date
19041904-01-141904-12-13
19051905-01-041905-12-29
19061906-01-041906-12-21
19071907-01-011907-12-31
19081908-01-081908-12-18
19091909-01-061909-12-27
19101910-01-071910-12-24
19111911-01-021911-12-27
19121912-01-011912-12-31
19131913-01-031913-12-26
19141914-01-041914-12-30
19151915-01-071915-12-19
19161916-02-251916-12-28
19171917-01-051917-12-14
19201920-01-081920-12-26
19211921-01-151921-12-24
19221922-01-121922-12-29
19231923-01-011923-12-31
19241924-01-031924-12-25
19251925-01-031925-12-22
19261926-01-191926-12-29
19271927-01-161927-12-30
19281928-01-011928-12-28
19291929-01-021929-12-19
19301930-01-041930-12-28
19321932-01-021932-12-28
19331933-01-101933-12-27
19341934-01-061934-12-27
19351935-01-011935-12-30
19361936-01-031936-12-20
19371937-01-011937-12-25
19381938-01-071938-12-27
19391939-01-061939-12-21
19401940-01-151940-12-29
19411941-01-171941-12-25
19421942-01-021942-12-31
19431943-01-191943-12-27
19441944-01-041944-12-28
19451945-01-021945-12-30
19461946-01-101946-12-30
19481948-01-021948-12-31
19501950-01-111950-12-30
19521952-01-031952-12-22
19531953-01-031953-12-14
19541954-01-121954-12-30
19551955-02-031955-11-17
19561956-01-121956-12-23
19571957-01-231957-12-27
19581958-01-151958-12-04
19591959-01-021959-12-29
19601960-01-031960-12-29
19611961-01-011961-12-19
19621962-01-071962-12-22

Every Fixed Threshold

Fixed thresholds at Chatham
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain5351191132
25 mm (0.98 in): Days with 25 mm or more rain5322194211
50 mm (1.97 in): Days with 50 mm or more rain52619241
100 mm (3.94 in): Days with 100 mm or more rain7219241
200 mm (7.87 in): Days with 200 mm or more rain1119041

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

  • Data for Chatham 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).