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Built 2026-10-19 (19 October 2026)

Hecla Threshold Days by Year (USC00484440)

6 fixed thresholds counted per year at Hecla (USC00484440): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hecla Thresholds

  • Hecla: days with 10 mm (0.39 in) or more of precipitation in 49 years, most in 1929 with 21.
  • Hecla: days with 25 mm (0.98 in) or more of precipitation in 42 years, most in 1942 with 7.
  • Hecla: days with 10 cm (3.9 in) or more of snowfall in 40 years, most in 1970 with 11.
  • Hecla: days with 25 cm (9.8 in) or more of snowfall in 15 years, most in 1942 with 2.
  • 6 fixed thresholds have at least one qualifying day at Hecla.
49 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Hecla Days per year at Hecla with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1929. 01020301919: 101926: 111929: 211930: 151932: 91933: 71934: 71936: 71937: 131938: 131939: 31940: 111941: 121942: 131943: 111944: 101945: 121947: 121948: 41949: 121950: 141951: 101952: 101953: 121954: 61955: 81956: 81957: 151958: 121959: 141960: 71961: 121962: 141963: 91964: 51965: 131966: 61967: 131968: 101969: 121970: 111971: 141972: 81973: 111974: 71975: 81976: 81977: 111978: 81919193319391944195019551960196519701975
Days per year at Hecla with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 21 in 1929.
Days with 10 mm (0.39 in) or more of precipitation per year at Hecla
YearDaysDecade average
19191010
19261116
19292116
1930159.3
193299.3
193379.3
193479.3
193679.3
1937139.3
1938139.3
193939.3
19401110.8
19411210.8
19421310.8
19431110.8
19441010.8
19451210.8
19471210.8
1948410.8
19491210.8
19501410.9
19511010.9
19521010.9
19531210.9
1954610.9
1955810.9
1956810.9
19571510.9
19581210.9
19591410.9
1960710.1
19611210.1
19621410.1
1963910.1
1964510.1
19651310.1
1966610.1
19671310.1
19681010.1
19691210.1
1970119.6
1971149.6
197289.6
1973119.6
197479.6
197589.6
197689.6
1977119.6
197889.6
First to last qualifying date each year at Hecla For each year, a bar from the first to the last day at Hecla meeting 10 mm (0.39 in). 1919: 6 April 1919 to 26 November 19191926: 13 March 1926 to 12 December 19261929: 21 February 1929 to 2 November 19291930: 16 January 1930 to 11 October 19301932: 3 February 1932 to 20 August 19321933: 21 April 1933 to 26 September 19331934: 21 February 1934 to 9 August 19341936: 25 April 1936 to 6 August 19361937: 13 March 1937 to 14 December 19371938: 11 January 1938 to 11 September 19381939: 11 March 1939 to 30 July 19391940: 1 February 1940 to 30 September 19401941: 2 April 1941 to 22 December 19411942: 19 March 1942 to 20 November 19421943: 24 February 1943 to 22 July 19431944: 21 March 1944 to 21 December 19441945: 30 January 1945 to 27 September 19451947: 28 April 1947 to 30 December 19471948: 24 April 1948 to 23 December 19481949: 8 March 1949 to 29 October 19491950: 28 April 1950 to 8 November 19501951: 28 January 1951 to 4 November 19511952: 20 March 1952 to 21 November 19521953: 20 February 1953 to 2 August 19531954: 30 March 1954 to 14 October 19541955: 11 April 1955 to 3 December 19551956: 27 April 1956 to 19 November 19561957: 5 March 1957 to 14 October 19571958: 9 March 1958 to 12 December 19581959: 24 March 1959 to 29 October 19591960: 28 April 1960 to 8 November 19601961: 3 March 1961 to 21 September 19611962: 8 January 1962 to 15 November 19621963: 3 March 1963 to 20 October 19631964: 3 April 1964 to 8 August 19641965: 8 May 1965 to 18 October 19651966: 8 February 1966 to 14 October 19661967: 25 March 1967 to 1 December 19671968: 2 April 1968 to 8 October 19681969: 16 February 1969 to 29 October 19691970: 17 March 1970 to 7 October 19701971: 2 January 1971 to 17 September 19711972: 14 April 1972 to 22 October 19721973: 19 April 1973 to 3 November 19731974: 22 March 1974 to 31 October 19741975: 31 March 1975 to 31 December 19751976: 20 February 1976 to 21 July 19761977: 10 March 1977 to 5 August 19771978: 5 May 1978 to 21 October 19781919193619431951195819651972JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hecla meeting 10 mm (0.39 in).
First to last qualifying date each year at Hecla
YearFirst dateLast date
19191919-04-061919-11-26
19261926-03-131926-12-12
19291929-02-211929-11-02
19301930-01-161930-10-11
19321932-02-031932-08-20
19331933-04-211933-09-26
19341934-02-211934-08-09
19361936-04-251936-08-06
19371937-03-131937-12-14
19381938-01-111938-09-11
19391939-03-111939-07-30
19401940-02-011940-09-30
19411941-04-021941-12-22
19421942-03-191942-11-20
19431943-02-241943-07-22
19441944-03-211944-12-21
19451945-01-301945-09-27
19471947-04-281947-12-30
19481948-04-241948-12-23
19491949-03-081949-10-29
19501950-04-281950-11-08
19511951-01-281951-11-04
19521952-03-201952-11-21
19531953-02-201953-08-02
19541954-03-301954-10-14
19551955-04-111955-12-03
19561956-04-271956-11-19
19571957-03-051957-10-14
19581958-03-091958-12-12
19591959-03-241959-10-29
19601960-04-281960-11-08
19611961-03-031961-09-21
19621962-01-081962-11-15
19631963-03-031963-10-20
19641964-04-031964-08-08
19651965-05-081965-10-18
19661966-02-081966-10-14
19671967-03-251967-12-01
19681968-04-021968-10-08
19691969-02-161969-10-29
19701970-03-171970-10-07
19711971-01-021971-09-17
19721972-04-141972-10-22
19731973-04-191973-11-03
19741974-03-221974-10-31
19751975-03-311975-12-31
19761976-02-201976-07-21
19771977-03-101977-08-05
19781978-05-051978-10-21

Every Fixed Threshold

Fixed thresholds at Hecla
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain492119298
25 mm (0.98 in): Days with 25 mm or more rain42719423
50 mm (1.97 in): Days with 50 mm or more rain6119301
10 cm (3.9 in): Days with 10 cm or more snowfall401119703
25 cm (9.8 in): Days with 25 cm or more snowfall15219421
50 cm (19.7 in): Days with 50 cm or more snowfall1119731

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 Hecla 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).