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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Derrylin Threshold Days by Year

4 fixed thresholds counted per year at Derrylin (ASN00040155): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Derrylin Thresholds

  • Derrylin: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1924 with 37.
  • Derrylin: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1927 with 13.
  • Derrylin: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1927 with 4.
  • Derrylin: days with 100 mm (3.94 in) or more of precipitation in 5 years, most in 1946 with 2.
  • 4 fixed thresholds have at least one qualifying day at Derrylin.
36 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Derrylin Days per year at Derrylin with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1924. 0102030401919: 141920: 221922: 161923: 151924: 371925: 251926: 141927: 321928: 301929: 281930: 221931: 231932: 141933: 201934: 231935: 271936: 201937: 211938: 151939: 241940: 231941: 171942: 251943: 221944: 181945: 201946: 161947: 301948: 211949: 231951: 101952: 171953: 221954: 231955: 261956: 30191919241928193219361940194419481953
Days per year at Derrylin with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1924.
Days with 10 mm (0.39 in) or more of precipitation per year at Derrylin
YearDaysDecade average
19191414
19202224.3
19221624.3
19231524.3
19243724.3
19252524.3
19261424.3
19273224.3
19283024.3
19292824.3
19302220.9
19312320.9
19321420.9
19332020.9
19342320.9
19352720.9
19362020.9
19372120.9
19381520.9
19392420.9
19402321.5
19411721.5
19422521.5
19432221.5
19441821.5
19452021.5
19461621.5
19473021.5
19482121.5
19492321.5
19511021.3
19521721.3
19532221.3
19542321.3
19552621.3
19563021.3
First to last qualifying date each year at Derrylin For each year, a bar from the first to the last day at Derrylin meeting 10 mm (0.39 in). 1919: 10 January 1919 to 1 December 19191920: 1 January 1920 to 16 November 19201922: 8 January 1922 to 17 December 19221923: 6 January 1923 to 27 December 19231924: 6 January 1924 to 27 December 19241925: 8 January 1925 to 30 December 19251926: 4 January 1926 to 28 December 19261927: 4 January 1927 to 26 December 19271928: 7 January 1928 to 31 December 19281929: 20 January 1929 to 31 December 19291930: 23 January 1930 to 18 December 19301931: 14 January 1931 to 11 December 19311932: 5 February 1932 to 17 December 19321933: 14 January 1933 to 26 December 19331934: 2 January 1934 to 27 December 19341935: 5 January 1935 to 26 December 19351936: 10 January 1936 to 28 December 19361937: 13 January 1937 to 31 December 19371938: 19 January 1938 to 30 November 19381939: 18 January 1939 to 28 December 19391940: 19 January 1940 to 22 December 19401941: 10 January 1941 to 30 December 19411942: 15 January 1942 to 31 December 19421943: 3 January 1943 to 30 December 19431944: 6 January 1944 to 22 December 19441945: 7 January 1945 to 5 December 19451946: 6 January 1946 to 13 December 19461947: 24 January 1947 to 25 December 19471948: 13 January 1948 to 19 December 19481949: 9 January 1949 to 17 December 19491951: 24 January 1951 to 6 October 19511952: 9 January 1952 to 28 November 19521953: 8 January 1953 to 28 December 19531954: 4 January 1954 to 16 December 19541955: 8 January 1955 to 31 December 19551956: 1 January 1956 to 23 December 195619191925193019351940194519511956JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Derrylin meeting 10 mm (0.39 in).
First to last qualifying date each year at Derrylin
YearFirst dateLast date
19191919-01-101919-12-01
19201920-01-011920-11-16
19221922-01-081922-12-17
19231923-01-061923-12-27
19241924-01-061924-12-27
19251925-01-081925-12-30
19261926-01-041926-12-28
19271927-01-041927-12-26
19281928-01-071928-12-31
19291929-01-201929-12-31
19301930-01-231930-12-18
19311931-01-141931-12-11
19321932-02-051932-12-17
19331933-01-141933-12-26
19341934-01-021934-12-27
19351935-01-051935-12-26
19361936-01-101936-12-28
19371937-01-131937-12-31
19381938-01-191938-11-30
19391939-01-181939-12-28
19401940-01-191940-12-22
19411941-01-101941-12-30
19421942-01-151942-12-31
19431943-01-031943-12-30
19441944-01-061944-12-22
19451945-01-071945-12-05
19461946-01-061946-12-13
19471947-01-241947-12-25
19481948-01-131948-12-19
19491949-01-091949-12-17
19511951-01-241951-10-06
19521952-01-091952-11-28
19531953-01-081953-12-28
19541954-01-041954-12-16
19551955-01-081955-12-31
19561956-01-011956-12-23

Every Fixed Threshold

Fixed thresholds at Derrylin
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3637192430
25 mm (0.98 in): Days with 25 mm or more rain3613192711
50 mm (1.97 in): Days with 50 mm or more rain29419272
100 mm (3.94 in): Days with 100 mm or more rain5219461

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1919.

Download the Data

  • Data for Derrylin 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).