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Built 2026-10-19 (19 October 2026)

Firth Threshold Days by Year (USC00252935)

8 fixed thresholds counted per year at Firth (USC00252935): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Firth Thresholds

  • Firth: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1993 with 44.
  • Firth: days with 25 mm (0.98 in) or more of precipitation in 39 years, most in 1951 with 15.
  • Firth: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1947 with 4.
  • Firth: days with 10 cm (3.9 in) or more of snowfall in 26 years, most in 1960 with 6.
  • 8 fixed thresholds have at least one qualifying day at Firth.
39 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Firth Days per year at Firth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1993. 02040601922: 171923: 221944: 291945: 271946: 171947: 251948: 301949: 331950: 211951: 401957: 301960: 201961: 271962: 261963: 181964: 211965: 301977: 261978: 311979: 221980: 201981: 281982: 271983: 261984: 281985: 201986: 371987: 341988: 171989: 161991: 261992: 341993: 441994: 221995: 291996: 291997: 281998: 321999: 191922194619501961196519801984198819931997
Days per year at Firth with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1993.
Days with 10 mm (0.39 in) or more of precipitation per year at Firth
YearDaysDecade average
19221719.5
19232219.5
19442926.8
19452726.8
19461726.8
19472526.8
19483026.8
19493326.8
19502130.3
19514030.3
19573030.3
19602023.7
19612723.7
19622623.7
19631823.7
19642123.7
19653023.7
19772626.3
19783126.3
19792226.3
19802025.3
19812825.3
19822725.3
19832625.3
19842825.3
19852025.3
19863725.3
19873425.3
19881725.3
19891625.3
19912629.2
19923429.2
19934429.2
19942229.2
19952929.2
19962929.2
19972829.2
19983229.2
19991929.2
First to last qualifying date each year at Firth For each year, a bar from the first to the last day at Firth meeting 10 mm (0.39 in). 1922: 22 February 1922 to 12 November 19221923: 3 March 1923 to 30 September 19231944: 27 January 1944 to 25 November 19441945: 28 January 1945 to 24 December 19451946: 5 March 1946 to 15 November 19461947: 12 March 1947 to 4 December 19471948: 1 January 1948 to 24 December 19481949: 3 January 1949 to 21 December 19491950: 13 February 1950 to 8 November 19501951: 24 February 1951 to 3 October 19511957: 24 March 1957 to 18 November 19571960: 21 February 1960 to 29 September 19601961: 8 March 1961 to 16 November 19611962: 15 February 1962 to 16 November 19621963: 5 March 1963 to 20 October 19631964: 3 February 1964 to 10 December 19641965: 9 February 1965 to 24 December 19651977: 20 March 1977 to 9 November 19771978: 13 February 1978 to 26 November 19781979: 19 January 1979 to 21 November 19791980: 16 January 1980 to 8 December 19801981: 1 February 1981 to 1 December 19811982: 3 March 1982 to 27 December 19821983: 4 March 1983 to 31 December 19831984: 17 February 1984 to 15 December 19841985: 3 March 1985 to 17 October 19851986: 3 February 1986 to 7 December 19861987: 28 February 1987 to 1 November 19871988: 2 April 1988 to 20 December 19881989: 28 January 1989 to 9 September 19891991: 5 January 1991 to 23 December 19911992: 1 January 1992 to 26 November 19921993: 8 January 1993 to 14 November 19931994: 26 January 1994 to 7 December 19941995: 3 February 1995 to 31 October 19951996: 27 January 1996 to 30 November 19961997: 4 February 1997 to 15 December 19971998: 1 February 1998 to 10 November 19981999: 9 March 1999 to 20 December 199919221947195719641980198519911996JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Firth meeting 10 mm (0.39 in).
First to last qualifying date each year at Firth
YearFirst dateLast date
19221922-02-221922-11-12
19231923-03-031923-09-30
19441944-01-271944-11-25
19451945-01-281945-12-24
19461946-03-051946-11-15
19471947-03-121947-12-04
19481948-01-011948-12-24
19491949-01-031949-12-21
19501950-02-131950-11-08
19511951-02-241951-10-03
19571957-03-241957-11-18
19601960-02-211960-09-29
19611961-03-081961-11-16
19621962-02-151962-11-16
19631963-03-051963-10-20
19641964-02-031964-12-10
19651965-02-091965-12-24
19771977-03-201977-11-09
19781978-02-131978-11-26
19791979-01-191979-11-21
19801980-01-161980-12-08
19811981-02-011981-12-01
19821982-03-031982-12-27
19831983-03-041983-12-31
19841984-02-171984-12-15
19851985-03-031985-10-17
19861986-02-031986-12-07
19871987-02-281987-11-01
19881988-04-021988-12-20
19891989-01-281989-09-09
19911991-01-051991-12-23
19921992-01-011992-11-26
19931993-01-081993-11-14
19941994-01-261994-12-07
19951995-02-031995-10-31
19961996-01-271996-11-30
19971997-02-041997-12-15
19981998-02-011998-11-10
19991999-03-091999-12-20

Every Fixed Threshold

Fixed thresholds at Firth
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3944199319
25 mm (0.98 in): Days with 25 mm or more rain391519517
50 mm (1.97 in): Days with 50 mm or more rain31419472
100 mm (3.94 in): Days with 100 mm or more rain7119501
200 mm (7.87 in): Days with 200 mm or more rain1119501
10 cm (3.9 in): Days with 10 cm or more snowfall26619601
25 cm (9.8 in): Days with 25 cm or more snowfall2119451
50 cm (19.7 in): Days with 50 cm or more snowfall1119651

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.

Download the Data

  • Data for Firth 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).