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Built 2026-10-18 (18 October 2026)

Lock Threshold Days by Year

3 fixed thresholds counted per year at Lock (ASN00018046): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lock Thresholds

  • Lock: days with 10 mm (0.39 in) or more of precipitation in 81 years, most in 1917 with 15.
  • Lock: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1946 with 4.
  • Lock: days with 50 mm (1.97 in) or more of precipitation in 6 years, most in 1946 with 2.
  • 3 fixed thresholds have at least one qualifying day at Lock.
81 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Lock Days per year at Lock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1917. 0510151915: 121917: 151918: 61919: 21920: 101921: 111922: 61923: 111924: 71925: 31926: 111927: 101929: 111930: 71931: 101933: 91934: 81935: 151936: 71937: 81938: 91939: 71940: 81941: 111942: 141943: 81944: 71945: 121946: 91947: 61948: 21949: 61950: 91951: 101952: 71953: 101954: 41956: 131957: 51958: 81959: 31960: 91961: 61962: 91963: 71964: 81965: 51966: 111967: 21968: 101969: 71970: 41971: 111972: 81973: 111974: 141975: 41976: 61977: 31978: 101979: 101980: 61982: 11983: 111984: 61994: 41996: 81998: 22000: 102002: 62003: 72007: 42008: 32009: 122012: 52016: 72017: 62019: 22020: 92021: 82026: 12191519251936194519541964197319832008
Days per year at Lock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 15 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at Lock
YearDaysDecade average
1915128.8
1917158.8
191868.8
191928.8
1920108.9
1921118.9
192268.9
1923118.9
192478.9
192538.9
1926118.9
1927108.9
1929118.9
193078.9
1931108.9
193398.9
193488.9
1935158.9
193678.9
193788.9
193898.9
193978.9
194088.3
1941118.3
1942148.3
194388.3
194478.3
1945128.3
194698.3
194768.3
194828.3
194968.3
195097.7
1951107.7
195277.7
1953107.7
195447.7
1956137.7
195757.7
195887.7
195937.7
196097.4
196167.4
196297.4
196377.4
196487.4
196557.4
1966117.4
196727.4
1968107.4
196977.4
197048.1
1971118.1
197288.1
1973118.1
1974148.1
197548.1
197668.1
197738.1
1978108.1
1979108.1
198066
198216
1983116
198466
199444.7
199684.7
199824.7
2000107
200267
200377
200747
200837
2009127
201255
201675
201765
201925
202099.7
202189.7
2026129.7
First to last qualifying date each year at Lock For each year, a bar from the first to the last day at Lock meeting 10 mm (0.39 in). 1915: 8 April 1915 to 19 September 19151917: 21 February 1917 to 27 December 19171918: 5 April 1918 to 30 November 19181919: 15 February 1919 to 6 May 19191920: 9 May 1920 to 26 November 19201921: 1 March 1921 to 26 November 19211922: 6 January 1922 to 9 December 19221923: 8 May 1923 to 27 December 19231924: 18 February 1924 to 20 November 19241925: 31 May 1925 to 17 October 19251926: 24 April 1926 to 26 December 19261927: 4 February 1927 to 1 November 19271929: 15 February 1929 to 27 December 19291930: 21 February 1930 to 24 October 19301931: 14 May 1931 to 11 September 19311933: 20 January 1933 to 30 November 19331934: 16 February 1934 to 8 November 19341935: 21 March 1935 to 24 December 19351936: 8 January 1936 to 25 July 19361937: 13 June 1937 to 11 December 19371938: 19 February 1938 to 27 December 19381939: 12 March 1939 to 3 November 19391940: 31 March 1940 to 13 July 19401941: 24 January 1941 to 18 November 19411942: 26 April 1942 to 24 December 19421943: 17 February 1943 to 16 October 19431944: 2 April 1944 to 1 October 19441945: 16 January 1945 to 16 December 19451946: 17 February 1946 to 24 December 19461947: 12 March 1947 to 19 October 19471948: 5 May 1948 to 4 November 19481949: 9 June 1949 to 15 October 19491950: 26 May 1950 to 19 December 19501951: 17 April 1951 to 28 September 19511952: 16 May 1952 to 26 November 19521953: 4 February 1953 to 30 December 19531954: 27 January 1954 to 29 April 19541956: 6 March 1956 to 15 November 19561957: 17 May 1957 to 6 September 19571958: 6 March 1958 to 4 October 19581959: 19 September 1959 to 28 November 19591960: 13 February 1960 to 12 November 19601961: 8 February 1961 to 16 August 19611962: 16 May 1962 to 29 December 19621963: 27 April 1963 to 14 August 19631964: 7 April 1964 to 18 November 19641965: 8 May 1965 to 24 December 19651966: 15 March 1966 to 3 December 19661967: 23 February 1967 to 26 May 19671968: 3 January 1968 to 1 October 19681969: 8 February 1969 to 13 September 19691970: 3 June 1970 to 14 November 19701971: 15 March 1971 to 10 December 19711972: 8 January 1972 to 10 August 19721973: 6 February 1973 to 24 September 19731974: 29 January 1974 to 24 October 19741975: 16 September 1975 to 24 October 19751976: 7 February 1976 to 13 October 19761977: 14 February 1977 to 2 December 19771978: 9 May 1978 to 18 November 19781979: 17 January 1979 to 15 November 19791980: 18 April 1980 to 5 November 19801982: 11 August 1982 to 11 August 19821983: 12 February 1983 to 6 December 19831984: 10 July 1984 to 1 September 19841994: 7 June 1994 to 30 July 19941996: 18 June 1996 to 6 December 19961998: 14 April 1998 to 28 July 19982000: 25 January 2000 to 18 October 20002002: 23 May 2002 to 31 December 20022003: 19 February 2003 to 18 November 20032007: 24 March 2007 to 15 December 20072008: 7 July 2008 to 13 December 20082009: 24 April 2009 to 13 October 20092012: 10 February 2012 to 22 June 20122016: 2 February 2016 to 27 December 20162017: 13 January 2017 to 23 November 20172019: 20 September 2019 to 21 September 20192020: 6 January 2020 to 23 October 20202021: 25 May 2021 to 11 November 20212026: 28 February 2026 to 25 August 202619151927194019511963197419962019JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lock meeting 10 mm (0.39 in).
First to last qualifying date each year at Lock
YearFirst dateLast date
19151915-04-081915-09-19
19171917-02-211917-12-27
19181918-04-051918-11-30
19191919-02-151919-05-06
19201920-05-091920-11-26
19211921-03-011921-11-26
19221922-01-061922-12-09
19231923-05-081923-12-27
19241924-02-181924-11-20
19251925-05-311925-10-17
19261926-04-241926-12-26
19271927-02-041927-11-01
19291929-02-151929-12-27
19301930-02-211930-10-24
19311931-05-141931-09-11
19331933-01-201933-11-30
19341934-02-161934-11-08
19351935-03-211935-12-24
19361936-01-081936-07-25
19371937-06-131937-12-11
19381938-02-191938-12-27
19391939-03-121939-11-03
19401940-03-311940-07-13
19411941-01-241941-11-18
19421942-04-261942-12-24
19431943-02-171943-10-16
19441944-04-021944-10-01
19451945-01-161945-12-16
19461946-02-171946-12-24
19471947-03-121947-10-19
19481948-05-051948-11-04
19491949-06-091949-10-15
19501950-05-261950-12-19
19511951-04-171951-09-28
19521952-05-161952-11-26
19531953-02-041953-12-30
19541954-01-271954-04-29
19561956-03-061956-11-15
19571957-05-171957-09-06
19581958-03-061958-10-04
19591959-09-191959-11-28
19601960-02-131960-11-12
19611961-02-081961-08-16
19621962-05-161962-12-29
19631963-04-271963-08-14
19641964-04-071964-11-18
19651965-05-081965-12-24
19661966-03-151966-12-03
19671967-02-231967-05-26
19681968-01-031968-10-01
19691969-02-081969-09-13
19701970-06-031970-11-14
19711971-03-151971-12-10
19721972-01-081972-08-10
19731973-02-061973-09-24
19741974-01-291974-10-24
19751975-09-161975-10-24
19761976-02-071976-10-13
19771977-02-141977-12-02
19781978-05-091978-11-18
19791979-01-171979-11-15
19801980-04-181980-11-05
19821982-08-111982-08-11
19831983-02-121983-12-06
19841984-07-101984-09-01
19941994-06-071994-07-30
19961996-06-181996-12-06
19981998-04-141998-07-28
20002000-01-252000-10-18
20022002-05-232002-12-31
20032003-02-192003-11-18
20072007-03-242007-12-15
20082008-07-072008-12-13
20092009-04-242009-10-13
20122012-02-102012-06-22
20162016-02-022016-12-27
20172017-01-132017-11-23
20192019-09-202019-09-21
20202020-01-062020-10-23
20212021-05-252021-11-11
20262026-02-282026-08-25

Every Fixed Threshold

Fixed thresholds at Lock
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain8115191712
25 mm (0.98 in): Days with 25 mm or more rain48419462
50 mm (1.97 in): Days with 50 mm or more rain6219461

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

  • Data for Lock 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 (2026-10-12).