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Built 2026-10-18 (18 October 2026)

Blackburn Threshold Days by Year

4 fixed thresholds counted per year at Blackburn (ASN00086137): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blackburn Thresholds

  • Blackburn: days with 10 mm (0.39 in) or more of precipitation in 40 years, most in 1911 with 39.
  • Blackburn: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1904 with 12.
  • Blackburn: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 1916 with 4.
  • Blackburn: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1911 with 1.
  • 4 fixed thresholds have at least one qualifying day at Blackburn.
40 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Blackburn Days per year at Blackburn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1911. 0102030401898: 151899: 311900: 271901: 201902: 191903: 371904: 321905: 211906: 201907: 161908: 231909: 331910: 261911: 391912: 181913: 221914: 171915: 191916: 311917: 281918: 231919: 151920: 291921: 291922: 311923: 171924: 341925: 131926: 171927: 181928: 261929: 341930: 281931: 251932: 261933: 211934: 271935: 261936: 171937: 171898190219061910191419181922192619301934
Days per year at Blackburn with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1911.
Days with 10 mm (0.39 in) or more of precipitation per year at Blackburn
YearDaysDecade average
18981523
18993123
19002724.8
19012024.8
19021924.8
19033724.8
19043224.8
19052124.8
19062024.8
19071624.8
19082324.8
19093324.8
19102623.8
19113923.8
19121823.8
19132223.8
19141723.8
19151923.8
19163123.8
19172823.8
19182323.8
19191523.8
19202924.8
19212924.8
19223124.8
19231724.8
19243424.8
19251324.8
19261724.8
19271824.8
19282624.8
19293424.8
19302823.4
19312523.4
19322623.4
19332123.4
19342723.4
19352623.4
19361723.4
19371723.4
First to last qualifying date each year at Blackburn For each year, a bar from the first to the last day at Blackburn meeting 10 mm (0.39 in). 1898: 1 January 1898 to 24 December 18981899: 2 January 1899 to 28 December 18991900: 3 January 1900 to 3 December 19001901: 4 January 1901 to 15 November 19011902: 5 January 1902 to 20 December 19021903: 7 January 1903 to 29 December 19031904: 3 January 1904 to 2 November 19041905: 12 February 1905 to 31 December 19051906: 11 March 1906 to 23 December 19061907: 26 January 1907 to 28 December 19071908: 10 January 1908 to 22 December 19081909: 4 January 1909 to 8 December 19091910: 15 January 1910 to 10 December 19101911: 6 February 1911 to 13 December 19111912: 8 February 1912 to 26 December 19121913: 5 February 1913 to 23 December 19131914: 25 February 1914 to 26 December 19141915: 7 January 1915 to 23 November 19151916: 28 January 1916 to 12 December 19161917: 21 February 1917 to 31 December 19171918: 15 January 1918 to 26 December 19181919: 7 January 1919 to 28 December 19191920: 21 January 1920 to 18 December 19201921: 2 January 1921 to 23 December 19211922: 8 January 1922 to 30 December 19221923: 8 May 1923 to 25 December 19231924: 26 January 1924 to 28 December 19241925: 13 January 1925 to 22 November 19251926: 7 January 1926 to 2 November 19261927: 24 February 1927 to 28 December 19271928: 18 January 1928 to 23 December 19281929: 4 January 1929 to 21 December 19291930: 20 February 1930 to 27 December 19301931: 26 January 1931 to 20 November 19311932: 6 February 1932 to 24 December 19321933: 27 January 1933 to 15 December 19331934: 7 January 1934 to 1 December 19341935: 3 January 1935 to 22 December 19351936: 9 January 1936 to 10 December 19361937: 19 January 1937 to 19 October 193718981903190819131918192319281933JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blackburn meeting 10 mm (0.39 in).
First to last qualifying date each year at Blackburn
YearFirst dateLast date
18981898-01-011898-12-24
18991899-01-021899-12-28
19001900-01-031900-12-03
19011901-01-041901-11-15
19021902-01-051902-12-20
19031903-01-071903-12-29
19041904-01-031904-11-02
19051905-02-121905-12-31
19061906-03-111906-12-23
19071907-01-261907-12-28
19081908-01-101908-12-22
19091909-01-041909-12-08
19101910-01-151910-12-10
19111911-02-061911-12-13
19121912-02-081912-12-26
19131913-02-051913-12-23
19141914-02-251914-12-26
19151915-01-071915-11-23
19161916-01-281916-12-12
19171917-02-211917-12-31
19181918-01-151918-12-26
19191919-01-071919-12-28
19201920-01-211920-12-18
19211921-01-021921-12-23
19221922-01-081922-12-30
19231923-05-081923-12-25
19241924-01-261924-12-28
19251925-01-131925-11-22
19261926-01-071926-11-02
19271927-02-241927-12-28
19281928-01-181928-12-23
19291929-01-041929-12-21
19301930-02-201930-12-27
19311931-01-261931-11-20
19321932-02-061932-12-24
19331933-01-271933-12-15
19341934-01-071934-12-01
19351935-01-031935-12-22
19361936-01-091936-12-10
19371937-01-191937-10-19

Every Fixed Threshold

Fixed thresholds at Blackburn
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4039191117
25 mm (0.98 in): Days with 25 mm or more rain391219045
50 mm (1.97 in): Days with 50 mm or more rain22419162
100 mm (3.94 in): Days with 100 mm or more rain1119111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1898.

Download the Data

  • Data for Blackburn 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).