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Built 2026-10-18 (18 October 2026)

D-Block Threshold Days by Year

3 fixed thresholds counted per year at D-Block (ASN00049099): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for D-Block Thresholds

  • D-Block: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1906 with 15.
  • D-Block: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 1894 with 7.
  • D-Block: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1906 with 2.
  • 3 fixed thresholds have at least one qualifying day at D-Block.
25 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at D-Block Days per year at D-Block with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1906. 0510151890: 111891: 141892: 101893: 101894: 141895: 81896: 71897: 41898: 81899: 91901: 51902: 51903: 111904: 131905: 81906: 151909: 61910: 81911: 131912: 91913: 61914: 41915: 71916: 91917: 13189018931896189919031906191119141917
Days per year at D-Block with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1906.
Days with 10 mm (0.39 in) or more of precipitation per year at D-Block
YearDaysDecade average
1890119.5
1891149.5
1892109.5
1893109.5
1894149.5
189589.5
189679.5
189749.5
189889.5
189999.5
190159
190259
1903119
1904139
190589
1906159
190969
191088.6
1911138.6
191298.6
191368.6
191448.6
191578.6
191698.6
1917138.6
First to last qualifying date each year at D-Block For each year, a bar from the first to the last day at D-Block meeting 10 mm (0.39 in). 1890: 3 February 1890 to 14 November 18901891: 10 January 1891 to 2 December 18911892: 30 April 1892 to 9 November 18921893: 31 March 1893 to 12 November 18931894: 26 January 1894 to 26 December 18941895: 5 January 1895 to 3 December 18951896: 7 January 1896 to 28 June 18961897: 9 January 1897 to 20 July 18971898: 28 February 1898 to 23 December 18981899: 26 February 1899 to 6 November 18991901: 26 January 1901 to 15 August 19011902: 26 March 1902 to 16 December 19021903: 5 March 1903 to 28 December 19031904: 2 January 1904 to 17 December 19041905: 18 February 1905 to 6 October 19051906: 28 February 1906 to 3 October 19061909: 28 February 1909 to 30 August 19091910: 13 January 1910 to 9 December 19101911: 28 January 1911 to 1 December 19111912: 25 February 1912 to 26 December 19121913: 25 March 1913 to 28 October 19131914: 28 February 1914 to 23 December 19141915: 13 May 1915 to 30 December 19151916: 5 June 1916 to 1 December 19161917: 13 January 1917 to 22 November 19171890189418981903190919131917JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at D-Block meeting 10 mm (0.39 in).
First to last qualifying date each year at D-Block
YearFirst dateLast date
18901890-02-031890-11-14
18911891-01-101891-12-02
18921892-04-301892-11-09
18931893-03-311893-11-12
18941894-01-261894-12-26
18951895-01-051895-12-03
18961896-01-071896-06-28
18971897-01-091897-07-20
18981898-02-281898-12-23
18991899-02-261899-11-06
19011901-01-261901-08-15
19021902-03-261902-12-16
19031903-03-051903-12-28
19041904-01-021904-12-17
19051905-02-181905-10-06
19061906-02-281906-10-03
19091909-02-281909-08-30
19101910-01-131910-12-09
19111911-01-281911-12-01
19121912-02-251912-12-26
19131913-03-251913-10-28
19141914-02-281914-12-23
19151915-05-131915-12-30
19161916-06-051916-12-01
19171917-01-131917-11-22

Every Fixed Threshold

Fixed thresholds at D-Block
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2515190613
25 mm (0.98 in): Days with 25 mm or more rain20718944
50 mm (1.97 in): Days with 50 mm or more rain6219061

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1890.

Download the Data

  • Data for D-Block 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).