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Built 2026-10-17 (17 October 2026)

Dartmoor Threshold Days by Year

4 fixed thresholds counted per year at Dartmoor (ASN00008041): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dartmoor Thresholds

  • Dartmoor: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1968 with 14.
  • Dartmoor: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1975 with 6.
  • Dartmoor: days with 50 mm (1.97 in) or more of precipitation in 11 years, most in 1941 with 3.
  • Dartmoor: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1970 with 1.
  • 4 fixed thresholds have at least one qualifying day at Dartmoor.
58 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Dartmoor Days per year at Dartmoor with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1968. 0510151927: 91928: 61929: 71930: 41931: 41932: 81933: 91934: 101935: 81936: 21937: 61938: 41939: 71940: 41941: 81942: 61943: 91944: 91945: 111946: 91947: 71948: 41949: 71950: 71951: 81957: 51958: 131959: 51960: 91961: 81962: 91967: 81968: 141969: 71970: 61971: 111972: 91973: 31974: 81975: 141976: 11977: 31978: 91979: 41980: 61981: 71983: 81984: 31987: 41988: 91989: 61991: 41993: 51994: 41995: 51998: 51999: 102000: 61927193319391945195119621972197819871995
Days per year at Dartmoor with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 14 in 1968.
Days with 10 mm (0.39 in) or more of precipitation per year at Dartmoor
YearDaysDecade average
192797.3
192867.3
192977.3
193046.2
193146.2
193286.2
193396.2
1934106.2
193586.2
193626.2
193766.2
193846.2
193976.2
194047.4
194187.4
194267.4
194397.4
194497.4
1945117.4
194697.4
194777.4
194847.4
194977.4
195077.6
195187.6
195757.6
1958137.6
195957.6
196099.2
196189.2
196299.2
196789.2
1968149.2
196979.2
197066.8
1971116.8
197296.8
197336.8
197486.8
1975146.8
197616.8
197736.8
197896.8
197946.8
198066.1
198176.1
198386.1
198436.1
198746.1
198896.1
198966.1
199145.5
199355.5
199445.5
199555.5
199855.5
1999105.5
200066
First to last qualifying date each year at Dartmoor For each year, a bar from the first to the last day at Dartmoor meeting 10 mm (0.39 in). 1927: 14 March 1927 to 25 July 19271928: 25 January 1928 to 17 July 19281929: 2 January 1929 to 29 June 19291930: 9 May 1930 to 26 June 19301931: 3 May 1931 to 16 July 19311932: 1 February 1932 to 19 December 19321933: 8 March 1933 to 1 December 19331934: 16 January 1934 to 14 July 19341935: 6 January 1935 to 5 August 19351936: 3 June 1936 to 31 December 19361937: 6 February 1937 to 23 August 19371938: 17 January 1938 to 18 July 19381939: 13 February 1939 to 10 November 19391940: 14 May 1940 to 4 September 19401941: 29 April 1941 to 14 December 19411942: 11 January 1942 to 30 June 19421943: 13 February 1943 to 8 December 19431944: 18 May 1944 to 27 August 19441945: 4 February 1945 to 11 November 19451946: 4 February 1946 to 12 August 19461947: 9 February 1947 to 25 October 19471948: 16 March 1948 to 23 November 19481949: 23 January 1949 to 1 September 19491950: 10 May 1950 to 10 October 19501951: 13 February 1951 to 14 July 19511957: 26 January 1957 to 24 August 19571958: 20 January 1958 to 18 December 19581959: 1 June 1959 to 19 December 19591960: 4 February 1960 to 23 July 19601961: 26 January 1961 to 15 June 19611962: 2 February 1962 to 1 October 19621967: 22 January 1967 to 8 August 19671968: 27 January 1968 to 3 July 19681969: 19 February 1969 to 28 July 19691970: 16 February 1970 to 29 December 19701971: 30 January 1971 to 15 August 19711972: 31 May 1972 to 11 September 19721973: 15 July 1973 to 8 December 19731974: 2 January 1974 to 20 October 19741975: 13 January 1975 to 3 November 19751976: 15 May 1976 to 15 May 19761977: 28 April 1977 to 11 August 19771978: 10 January 1978 to 20 September 19781979: 15 February 1979 to 24 June 19791980: 13 February 1980 to 26 August 19801981: 22 May 1981 to 31 July 19811983: 3 May 1983 to 17 November 19831984: 12 April 1984 to 22 June 19841987: 11 May 1987 to 11 November 19871988: 4 February 1988 to 29 December 19881989: 24 May 1989 to 21 July 19891991: 17 January 1991 to 24 December 19911993: 3 May 1993 to 13 November 19931994: 1 March 1994 to 11 August 19941995: 23 February 1995 to 16 November 19951998: 7 January 1998 to 1 July 19981999: 12 March 1999 to 21 September 19992000: 3 January 2000 to 16 August 200019271935194319511968197619871999JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Dartmoor meeting 10 mm (0.39 in).
First to last qualifying date each year at Dartmoor
YearFirst dateLast date
19271927-03-141927-07-25
19281928-01-251928-07-17
19291929-01-021929-06-29
19301930-05-091930-06-26
19311931-05-031931-07-16
19321932-02-011932-12-19
19331933-03-081933-12-01
19341934-01-161934-07-14
19351935-01-061935-08-05
19361936-06-031936-12-31
19371937-02-061937-08-23
19381938-01-171938-07-18
19391939-02-131939-11-10
19401940-05-141940-09-04
19411941-04-291941-12-14
19421942-01-111942-06-30
19431943-02-131943-12-08
19441944-05-181944-08-27
19451945-02-041945-11-11
19461946-02-041946-08-12
19471947-02-091947-10-25
19481948-03-161948-11-23
19491949-01-231949-09-01
19501950-05-101950-10-10
19511951-02-131951-07-14
19571957-01-261957-08-24
19581958-01-201958-12-18
19591959-06-011959-12-19
19601960-02-041960-07-23
19611961-01-261961-06-15
19621962-02-021962-10-01
19671967-01-221967-08-08
19681968-01-271968-07-03
19691969-02-191969-07-28
19701970-02-161970-12-29
19711971-01-301971-08-15
19721972-05-311972-09-11
19731973-07-151973-12-08
19741974-01-021974-10-20
19751975-01-131975-11-03
19761976-05-151976-05-15
19771977-04-281977-08-11
19781978-01-101978-09-20
19791979-02-151979-06-24
19801980-02-131980-08-26
19811981-05-221981-07-31
19831983-05-031983-11-17
19841984-04-121984-06-22
19871987-05-111987-11-11
19881988-02-041988-12-29
19891989-05-241989-07-21
19911991-01-171991-12-24
19931993-05-031993-11-13
19941994-03-011994-08-11
19951995-02-231995-11-16
19981998-01-071998-07-01
19991999-03-121999-09-21
20002000-01-032000-08-16

Every Fixed Threshold

Fixed thresholds at Dartmoor
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain581419686
25 mm (0.98 in): Days with 25 mm or more rain45619753
50 mm (1.97 in): Days with 50 mm or more rain11319411
100 mm (3.94 in): Days with 100 mm or more rain1119701

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1927.

Download the Data

  • Data for Dartmoor 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).