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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Black River 1 SW Threshold Days by Year (USC00300706)

6 fixed thresholds counted per year at Black River 1 SW (USC00300706): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Black River 1 SW Thresholds

  • Black River 1 SW: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1945 with 45.
  • Black River 1 SW: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1947 with 11.
  • Black River 1 SW: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1945 with 2.
  • Black River 1 SW: days with 10 cm (3.9 in) or more of snowfall in 6 years, most in 1971 with 11.
  • 6 fixed thresholds have at least one qualifying day at Black River 1 SW.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Black River 1 SW Days per year at Black River 1 SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1945. 02040601940: 301941: 271942: 461943: 311944: 261945: 451946: 361947: 431948: 301949: 311950: 291951: 391952: 301953: 291954: 371955: 291957: 321958: 321959: 391960: 291961: 311962: 301963: 231964: 291965: 341966: 321967: 271968: 301969: 321970: 321971: 341972: 371973: 341974: 26194019441948195219571961196519691973
Days per year at Black River 1 SW with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 45 in 1945.
Days with 10 mm (0.39 in) or more of precipitation per year at Black River 1 SW
YearDaysDecade average
19403034.5
19412734.5
19424634.5
19433134.5
19442634.5
19454534.5
19463634.5
19474334.5
19483034.5
19493134.5
19502932.9
19513932.9
19523032.9
19532932.9
19543732.9
19552932.9
19573232.9
19583232.9
19593932.9
19602929.7
19613129.7
19623029.7
19632329.7
19642929.7
19653429.7
19663229.7
19672729.7
19683029.7
19693229.7
19703232.6
19713432.6
19723732.6
19733432.6
19742632.6
First to last qualifying date each year at Black River 1 SW For each year, a bar from the first to the last day at Black River 1 SW meeting 10 mm (0.39 in). 1940: 1 January 1940 to 30 December 19401941: 8 February 1941 to 25 December 19411942: 2 January 1942 to 31 December 19421943: 7 February 1943 to 22 November 19431944: 1 February 1944 to 13 December 19441945: 2 January 1945 to 17 December 19451946: 22 January 1946 to 28 December 19461947: 3 January 1947 to 16 December 19471948: 2 January 1948 to 31 December 19481949: 1 January 1949 to 27 December 19491950: 7 January 1950 to 18 December 19501951: 4 January 1951 to 26 December 19511952: 18 January 1952 to 12 December 19521953: 1 February 1953 to 27 December 19531954: 21 January 1954 to 30 December 19541955: 26 January 1955 to 29 November 19551957: 13 January 1957 to 27 December 19571958: 26 January 1958 to 16 December 19581959: 17 January 1959 to 29 December 19591960: 3 January 1960 to 18 December 19601961: 2 January 1961 to 31 December 19611962: 7 January 1962 to 12 December 19621963: 13 January 1963 to 30 December 19631964: 2 January 1964 to 26 December 19641965: 9 January 1965 to 26 December 19651966: 24 January 1966 to 30 December 19661967: 28 January 1967 to 12 December 19671968: 30 January 1968 to 28 December 19681969: 10 January 1969 to 28 December 19691970: 9 January 1970 to 17 December 19701971: 5 January 1971 to 31 December 19711972: 4 February 1972 to 16 December 19721973: 23 January 1973 to 27 December 19731974: 22 February 1974 to 17 December 19741940194519501955196119661971JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Black River 1 SW meeting 10 mm (0.39 in).
First to last qualifying date each year at Black River 1 SW
YearFirst dateLast date
19401940-01-011940-12-30
19411941-02-081941-12-25
19421942-01-021942-12-31
19431943-02-071943-11-22
19441944-02-011944-12-13
19451945-01-021945-12-17
19461946-01-221946-12-28
19471947-01-031947-12-16
19481948-01-021948-12-31
19491949-01-011949-12-27
19501950-01-071950-12-18
19511951-01-041951-12-26
19521952-01-181952-12-12
19531953-02-011953-12-27
19541954-01-211954-12-30
19551955-01-261955-11-29
19571957-01-131957-12-27
19581958-01-261958-12-16
19591959-01-171959-12-29
19601960-01-031960-12-18
19611961-01-021961-12-31
19621962-01-071962-12-12
19631963-01-131963-12-30
19641964-01-021964-12-26
19651965-01-091965-12-26
19661966-01-241966-12-30
19671967-01-281967-12-12
19681968-01-301968-12-28
19691969-01-101969-12-28
19701970-01-091970-12-17
19711971-01-051971-12-31
19721972-02-041972-12-16
19731973-01-231973-12-27
19741974-02-221974-12-17

Every Fixed Threshold

Fixed thresholds at Black River 1 SW
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3445194526
25 mm (0.98 in): Days with 25 mm or more rain341119476
50 mm (1.97 in): Days with 50 mm or more rain13219451
10 cm (3.9 in): Days with 10 cm or more snowfall61119714
25 cm (9.8 in): Days with 25 cm or more snowfall4319723
50 cm (19.7 in): Days with 50 cm or more snowfall1119701

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 Black River 1 SW 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).