Built 2026-10-18 (18 October 2026)

Hesso Threshold Days by Year

4 fixed thresholds counted per year at Hesso (ASN00016015): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hesso Thresholds

  • Hesso: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1955 with 13.
  • Hesso: days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 1921 with 4.
  • Hesso: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1921 with 3.
  • Hesso: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1921 with 1.
  • 4 fixed thresholds have at least one qualifying day at Hesso.
60 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Hesso Days per year at Hesso with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 1955. 0510151916: 51917: 51918: 41920: 71921: 41922: 51923: 11924: 41925: 41926: 61927: 21928: 21929: 31930: 51931: 41932: 31933: 21934: 21935: 11936: 31937: 71938: 61939: 21940: 31941: 41942: 41943: 21944: 41945: 81946: 51948: 11949: 61950: 81951: 71952: 61953: 11954: 61955: 131956: 11957: 11958: 71959: 11960: 81961: 61962: 41963: 91964: 21965: 21966: 61967: 31968: 91969: 31970: 11971: 51972: 21973: 131974: 101975: 71976: 21978: 41916192319291935194119481954196019661972
Days per year at Hesso with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 13 in 1955.
Days with 10 mm (0.39 in) or more of precipitation per year at Hesso
YearDaysDecade average
191654.7
191754.7
191844.7
192073.8
192143.8
192253.8
192313.8
192443.8
192543.8
192663.8
192723.8
192823.8
192933.8
193053.5
193143.5
193233.5
193323.5
193423.5
193513.5
193633.5
193773.5
193863.5
193923.5
194034.1
194144.1
194244.1
194324.1
194444.1
194584.1
194654.1
194814.1
194964.1
195085.1
195175.1
195265.1
195315.1
195465.1
1955135.1
195615.1
195715.1
195875.1
195915.1
196085.2
196165.2
196245.2
196395.2
196425.2
196525.2
196665.2
196735.2
196895.2
196935.2
197015.5
197155.5
197225.5
1973135.5
1974105.5
197575.5
197625.5
197845.5
First to last qualifying date each year at Hesso For each year, a bar from the first to the last day at Hesso meeting 10 mm (0.39 in). 1916: 25 June 1916 to 22 October 19161917: 11 January 1917 to 11 July 19171918: 28 January 1918 to 20 August 19181920: 1 June 1920 to 1 December 19201921: 28 February 1921 to 20 May 19211922: 30 April 1922 to 9 December 19221923: 23 June 1923 to 23 June 19231924: 19 February 1924 to 11 November 19241925: 3 April 1925 to 18 November 19251926: 11 May 1926 to 1 December 19261927: 9 June 1927 to 18 June 19271928: 25 May 1928 to 2 June 19281929: 2 June 1929 to 17 November 19291930: 24 April 1930 to 24 October 19301931: 31 March 1931 to 24 June 19311932: 5 February 1932 to 25 October 19321933: 31 August 1933 to 30 November 19331934: 16 February 1934 to 6 November 19341935: 20 October 1935 to 20 October 19351936: 8 January 1936 to 8 October 19361937: 8 January 1937 to 30 November 19371938: 19 February 1938 to 24 October 19381939: 17 January 1939 to 3 November 19391940: 5 January 1940 to 31 March 19401941: 3 January 1941 to 5 October 19411942: 3 May 1942 to 30 August 19421943: 18 February 1943 to 16 October 19431944: 6 February 1944 to 21 December 19441945: 10 January 1945 to 27 December 19451946: 17 January 1946 to 24 December 19461948: 25 December 1948 to 25 December 19481949: 27 February 1949 to 11 November 19491950: 3 February 1950 to 20 December 19501951: 13 May 1951 to 9 October 19511952: 25 January 1952 to 31 October 19521953: 5 February 1953 to 5 February 19531954: 27 January 1954 to 1 November 19541955: 13 February 1955 to 24 November 19551956: 11 July 1956 to 11 July 19561957: 29 December 1957 to 29 December 19571958: 7 March 1958 to 12 November 19581959: 14 February 1959 to 14 February 19591960: 10 January 1960 to 9 November 19601961: 28 January 1961 to 15 November 19611962: 16 January 1962 to 26 December 19621963: 13 January 1963 to 11 June 19631964: 23 August 1964 to 26 September 19641965: 8 May 1965 to 2 July 19651966: 15 February 1966 to 2 December 19661967: 25 January 1967 to 24 February 19671968: 19 January 1968 to 8 August 19681969: 14 January 1969 to 11 July 19691970: 11 November 1970 to 11 November 19701971: 8 June 1971 to 10 December 19711972: 11 January 1972 to 1 August 19721973: 3 February 1973 to 19 October 19731974: 29 January 1974 to 24 October 19741975: 21 February 1975 to 13 December 19751976: 4 October 1976 to 13 October 19761978: 4 June 1978 to 18 November 197819161925193319411950195819661974JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hesso meeting 10 mm (0.39 in).
First to last qualifying date each year at Hesso
YearFirst dateLast date
19161916-06-251916-10-22
19171917-01-111917-07-11
19181918-01-281918-08-20
19201920-06-011920-12-01
19211921-02-281921-05-20
19221922-04-301922-12-09
19231923-06-231923-06-23
19241924-02-191924-11-11
19251925-04-031925-11-18
19261926-05-111926-12-01
19271927-06-091927-06-18
19281928-05-251928-06-02
19291929-06-021929-11-17
19301930-04-241930-10-24
19311931-03-311931-06-24
19321932-02-051932-10-25
19331933-08-311933-11-30
19341934-02-161934-11-06
19351935-10-201935-10-20
19361936-01-081936-10-08
19371937-01-081937-11-30
19381938-02-191938-10-24
19391939-01-171939-11-03
19401940-01-051940-03-31
19411941-01-031941-10-05
19421942-05-031942-08-30
19431943-02-181943-10-16
19441944-02-061944-12-21
19451945-01-101945-12-27
19461946-01-171946-12-24
19481948-12-251948-12-25
19491949-02-271949-11-11
19501950-02-031950-12-20
19511951-05-131951-10-09
19521952-01-251952-10-31
19531953-02-051953-02-05
19541954-01-271954-11-01
19551955-02-131955-11-24
19561956-07-111956-07-11
19571957-12-291957-12-29
19581958-03-071958-11-12
19591959-02-141959-02-14
19601960-01-101960-11-09
19611961-01-281961-11-15
19621962-01-161962-12-26
19631963-01-131963-06-11
19641964-08-231964-09-26
19651965-05-081965-07-02
19661966-02-151966-12-02
19671967-01-251967-02-24
19681968-01-191968-08-08
19691969-01-141969-07-11
19701970-11-111970-11-11
19711971-06-081971-12-10
19721972-01-111972-08-01
19731973-02-031973-10-19
19741974-01-291974-10-24
19751975-02-211975-12-13
19761976-10-041976-10-13
19781978-06-041978-11-18

Every Fixed Threshold

Fixed thresholds at Hesso
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain601319554
25 mm (0.98 in): Days with 25 mm or more rain38419211
50 mm (1.97 in): Days with 50 mm or more rain7319211
100 mm (3.94 in): Days with 100 mm or more rain1119211

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1916.

Download the Data

  • Data for Hesso 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).