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Built 2026-10-17 (17 October 2026)

Shannon River (Hermitage) Threshold Days by Year

3 fixed thresholds counted per year at Shannon River (Hermitage) (ASN00096010): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shannon River (Hermitage) Thresholds

  • Shannon River (Hermitage): days with 10 mm (0.39 in) or more of precipitation in 46 years, most in 1970 with 23.
  • Shannon River (Hermitage): days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 1970 with 7.
  • Shannon River (Hermitage): days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1931 with 1.
  • 3 fixed thresholds have at least one qualifying day at Shannon River (Hermitage).
46 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Shannon River (Hermitage) Days per year at Shannon River (Hermitage) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1970. 01020301921: 81922: 131923: 201924: 191925: 131926: 151927: 121928: 121929: 141930: 131931: 141932: 121933: 101934: 151935: 171936: 81937: 181938: 151939: 151940: 121941: 151942: 111943: 111966: 221967: 131968: 151969: 221970: 231971: 211972: 141973: 181974: 231975: 211976: 171977: 131978: 121979: 71980: 101981: 121982: 111983: 131984: 171985: 151986: 131989: 141990: 91921192619311936194119681973197819831990
Days per year at Shannon River (Hermitage) with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 23 in 1970.
Days with 10 mm (0.39 in) or more of precipitation per year at Shannon River (Hermitage)
YearDaysDecade average
1921814
19221314
19232014
19241914
19251314
19261514
19271214
19281214
19291414
19301313.7
19311413.7
19321213.7
19331013.7
19341513.7
19351713.7
1936813.7
19371813.7
19381513.7
19391513.7
19401212.3
19411512.3
19421112.3
19431112.3
19662218
19671318
19681518
19692218
19702316.9
19712116.9
19721416.9
19731816.9
19742316.9
19752116.9
19761716.9
19771316.9
19781216.9
1979716.9
19801013.1
19811213.1
19821113.1
19831313.1
19841713.1
19851513.1
19861313.1
19891413.1
199099
First to last qualifying date each year at Shannon River (Hermitage) For each year, a bar from the first to the last day at Shannon River (Hermitage) meeting 10 mm (0.39 in). 1921: 3 January 1921 to 24 November 19211922: 8 January 1922 to 25 October 19221923: 5 January 1923 to 5 December 19231924: 27 January 1924 to 27 November 19241925: 15 January 1925 to 23 December 19251926: 9 February 1926 to 13 October 19261927: 28 January 1927 to 19 December 19271928: 1 January 1928 to 8 October 19281929: 10 January 1929 to 29 December 19291930: 19 January 1930 to 25 December 19301931: 14 February 1931 to 17 November 19311932: 12 February 1932 to 2 December 19321933: 6 April 1933 to 30 November 19331934: 25 January 1934 to 31 December 19341935: 5 January 1935 to 21 December 19351936: 4 March 1936 to 19 December 19361937: 2 January 1937 to 26 December 19371938: 15 January 1938 to 11 December 19381939: 17 February 1939 to 23 December 19391940: 6 January 1940 to 8 December 19401941: 17 January 1941 to 5 December 19411942: 20 February 1942 to 23 December 19421943: 17 January 1943 to 5 December 19431966: 5 February 1966 to 16 December 19661967: 20 January 1967 to 18 December 19671968: 13 February 1968 to 31 December 19681969: 26 January 1969 to 13 December 19691970: 3 January 1970 to 31 December 19701971: 3 January 1971 to 26 December 19711972: 1 January 1972 to 25 December 19721973: 13 January 1973 to 22 December 19731974: 16 January 1974 to 28 December 19741975: 9 January 1975 to 25 November 19751976: 25 January 1976 to 24 December 19761977: 16 January 1977 to 20 December 19771978: 5 February 1978 to 26 December 19781979: 21 January 1979 to 16 December 19791980: 20 February 1980 to 29 November 19801981: 19 January 1981 to 6 December 19811982: 7 January 1982 to 9 December 19821983: 23 March 1983 to 17 November 19831984: 14 March 1984 to 26 December 19841985: 30 January 1985 to 18 December 19851986: 2 January 1986 to 17 December 19861989: 5 January 1989 to 14 December 19891990: 4 January 1990 to 20 October 199019211927193319391967197319791985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Shannon River (Hermitage) meeting 10 mm (0.39 in).
First to last qualifying date each year at Shannon River (Hermitage)
YearFirst dateLast date
19211921-01-031921-11-24
19221922-01-081922-10-25
19231923-01-051923-12-05
19241924-01-271924-11-27
19251925-01-151925-12-23
19261926-02-091926-10-13
19271927-01-281927-12-19
19281928-01-011928-10-08
19291929-01-101929-12-29
19301930-01-191930-12-25
19311931-02-141931-11-17
19321932-02-121932-12-02
19331933-04-061933-11-30
19341934-01-251934-12-31
19351935-01-051935-12-21
19361936-03-041936-12-19
19371937-01-021937-12-26
19381938-01-151938-12-11
19391939-02-171939-12-23
19401940-01-061940-12-08
19411941-01-171941-12-05
19421942-02-201942-12-23
19431943-01-171943-12-05
19661966-02-051966-12-16
19671967-01-201967-12-18
19681968-02-131968-12-31
19691969-01-261969-12-13
19701970-01-031970-12-31
19711971-01-031971-12-26
19721972-01-011972-12-25
19731973-01-131973-12-22
19741974-01-161974-12-28
19751975-01-091975-11-25
19761976-01-251976-12-24
19771977-01-161977-12-20
19781978-02-051978-12-26
19791979-01-211979-12-16
19801980-02-201980-11-29
19811981-01-191981-12-06
19821982-01-071982-12-09
19831983-03-231983-11-17
19841984-03-141984-12-26
19851985-01-301985-12-18
19861986-01-021986-12-17
19891989-01-051989-12-14
19901990-01-041990-10-20

Every Fixed Threshold

Fixed thresholds at Shannon River (Hermitage)
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain462319709
25 mm (0.98 in): Days with 25 mm or more rain38719702
50 mm (1.97 in): Days with 50 mm or more rain10119311

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.

Download the Data

  • Data for Shannon River (Hermitage) 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).