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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Massena Snell Lock Threshold Days by Year

5 fixed thresholds counted per year at Massena Snell Lock (USC00305129): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Massena Snell Lock Thresholds

  • Massena Snell Lock: days with 10 mm (0.39 in) or more of precipitation in 18 years, most in 1947 with 40.
  • Massena Snell Lock: days with 25 mm (0.98 in) or more of precipitation in 18 years, most in 1954 with 7.
  • Massena Snell Lock: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 1950 with 7.
  • Massena Snell Lock: days with 50 mm (1.97 in) or more of precipitation in 10 years, most in 1940 with 1.
  • 5 fixed thresholds have at least one qualifying day at Massena Snell Lock.
18 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Massena Snell Lock Days per year at Massena Snell Lock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1947. 0102030401940: 241941: 151942: 261943: 231944: 151945: 271946: 281947: 401948: 221949: 211950: 261951: 261952: 301953: 261954: 361955: 181956: 171957: 24194019421944194619481950195219541956
Days per year at Massena Snell Lock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 40 in 1947.
Days with 10 mm (0.39 in) or more of precipitation per year at Massena Snell Lock
YearDaysDecade average
19402424.1
19411524.1
19422624.1
19432324.1
19441524.1
19452724.1
19462824.1
19474024.1
19482224.1
19492124.1
19502625.4
19512625.4
19523025.4
19532625.4
19543625.4
19551825.4
19561725.4
19572425.4
First to last qualifying date each year at Massena Snell Lock For each year, a bar from the first to the last day at Massena Snell Lock meeting 10 mm (0.39 in). 1940: 15 March 1940 to 29 December 19401941: 8 February 1941 to 24 December 19411942: 2 January 1942 to 31 December 19421943: 6 February 1943 to 9 November 19431944: 15 February 1944 to 12 December 19441945: 1 April 1945 to 25 December 19451946: 9 January 1946 to 28 December 19461947: 2 January 1947 to 16 December 19471948: 14 February 1948 to 31 December 19481949: 13 February 1949 to 18 December 19491950: 4 January 1950 to 8 December 19501951: 3 January 1951 to 21 December 19511952: 18 January 1952 to 11 December 19521953: 24 January 1953 to 22 December 19531954: 16 February 1954 to 30 December 19541955: 11 March 1955 to 21 October 19551956: 8 March 1956 to 7 December 19561957: 22 January 1957 to 26 December 1957194019431946194919521955JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Massena Snell Lock meeting 10 mm (0.39 in).
First to last qualifying date each year at Massena Snell Lock
YearFirst dateLast date
19401940-03-151940-12-29
19411941-02-081941-12-24
19421942-01-021942-12-31
19431943-02-061943-11-09
19441944-02-151944-12-12
19451945-04-011945-12-25
19461946-01-091946-12-28
19471947-01-021947-12-16
19481948-02-141948-12-31
19491949-02-131949-12-18
19501950-01-041950-12-08
19511951-01-031951-12-21
19521952-01-181952-12-11
19531953-01-241953-12-22
19541954-02-161954-12-30
19551955-03-111955-10-21
19561956-03-081956-12-07
19571957-01-221957-12-26

Every Fixed Threshold

Fixed thresholds at Massena Snell Lock
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1840194724
25 mm (0.98 in): Days with 25 mm or more rain18719544
50 mm (1.97 in): Days with 50 mm or more rain10119401
10 cm (3.9 in): Days with 10 cm or more snowfall11719505
25 cm (9.8 in): Days with 25 cm or more snowfall1219602

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

  • Data for Massena Snell 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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