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Data as of 2025-12-31
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Built 2026-10-15 (15 October 2026)

South West River Station Threshold Days by Year

3 fixed thresholds counted per year at South West River Station (ASN00022821): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for South West River Station Thresholds

  • South West River Station: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1971 with 32.
  • South West River Station: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 1954 with 5.
  • South West River Station: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1960 with 2.
  • 3 fixed thresholds have at least one qualifying day at South West River Station.
19 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at South West River Station Days per year at South West River Station with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1971. 0102030401952: 161953: 211954: 121956: 271957: 221958: 161959: 151960: 201961: 151962: 151963: 171964: 231965: 151966: 241967: 101968: 251969: 161970: 201971: 321952195419571959196119631965196719691971
Days per year at South West River Station with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 32 in 1971.
Days with 10 mm (0.39 in) or more of precipitation per year at South West River Station
YearDaysDecade average
19521618.4
19532118.4
19541218.4
19562718.4
19572218.4
19581618.4
19591518.4
19602018
19611518
19621518
19631718
19642318
19651518
19662418
19671018
19682518
19691618
19702026
19713226
First to last qualifying date each year at South West River Station For each year, a bar from the first to the last day at South West River Station meeting 10 mm (0.39 in). 1952: 23 January 1952 to 1 October 19521953: 4 April 1953 to 9 December 19531954: 6 April 1954 to 10 December 19541956: 11 January 1956 to 17 October 19561957: 12 March 1957 to 17 November 19571958: 12 April 1958 to 9 October 19581959: 13 February 1959 to 26 December 19591960: 17 January 1960 to 14 September 19601961: 7 April 1961 to 18 October 19611962: 28 March 1962 to 30 December 19621963: 13 January 1963 to 14 September 19631964: 1 February 1964 to 23 December 19641965: 4 April 1965 to 24 November 19651966: 21 March 1966 to 4 December 19661967: 23 February 1967 to 14 September 19671968: 29 March 1968 to 6 October 19681969: 14 January 1969 to 16 November 19691970: 12 January 1970 to 14 November 19701971: 15 March 1971 to 10 December 19711952195619591962196519681971JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at South West River Station meeting 10 mm (0.39 in).
First to last qualifying date each year at South West River Station
YearFirst dateLast date
19521952-01-231952-10-01
19531953-04-041953-12-09
19541954-04-061954-12-10
19561956-01-111956-10-17
19571957-03-121957-11-17
19581958-04-121958-10-09
19591959-02-131959-12-26
19601960-01-171960-09-14
19611961-04-071961-10-18
19621962-03-281962-12-30
19631963-01-131963-09-14
19641964-02-011964-12-23
19651965-04-041965-11-24
19661966-03-211966-12-04
19671967-02-231967-09-14
19681968-03-291968-10-06
19691969-01-141969-11-16
19701970-01-121970-11-14
19711971-03-151971-12-10

Every Fixed Threshold

Fixed thresholds at South West River Station
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1932197132
25 mm (0.98 in): Days with 25 mm or more rain15519544
50 mm (1.97 in): Days with 50 mm or more rain7219601

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

  • Data for South West River Station 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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