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Built 2026-10-19 (19 October 2026)

S. Luis Threshold Days by Year (BR027510440)

5 fixed thresholds counted per year at S. Luis (BR027510440): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for S. Luis Thresholds

  • S. Luis: days with 10 mm (0.39 in) or more of precipitation in 31 years, most in 1917 with 89.
  • S. Luis: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1917 with 43.
  • S. Luis: days with 50 mm (1.97 in) or more of precipitation in 31 years, most in 1926 with 19.
  • S. Luis: days with 100 mm (3.94 in) or more of precipitation in 15 years, most in 1934 with 3.
  • 5 fixed thresholds have at least one qualifying day at S. Luis.
31 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at S. Luis Days per year at S. Luis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 89 in 1917. 02550751001912: 801913: 671914: 461915: 291916: 591917: 891918: 421919: 251920: 581921: 791922: 631923: 641924: 781926: 801927: 611928: 491929: 711930: 651931: 561932: 311933: 771934: 771935: 681936: 461937: 741938: 541939: 671940: 701941: 351942: 431943: 4619121916192019241929193319371941
Days per year at S. Luis with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 89 in 1917.
Days with 10 mm (0.39 in) or more of precipitation per year at S. Luis
YearDaysDecade average
19128054.6
19136754.6
19144654.6
19152954.6
19165954.6
19178954.6
19184254.6
19192554.6
19205867
19217967
19226367
19236467
19247867
19268067
19276167
19284967
19297167
19306561.5
19315661.5
19323161.5
19337761.5
19347761.5
19356861.5
19364661.5
19377461.5
19385461.5
19396761.5
19407048.5
19413548.5
19424348.5
19434648.5
First to last qualifying date each year at S. Luis For each year, a bar from the first to the last day at S. Luis meeting 10 mm (0.39 in). 1912: 3 February 1912 to 16 December 19121913: 5 January 1913 to 10 December 19131914: 15 January 1914 to 7 July 19141915: 23 January 1915 to 23 December 19151916: 17 January 1916 to 31 December 19161917: 3 January 1917 to 24 December 19171918: 1 January 1918 to 31 December 19181919: 1 January 1919 to 22 November 19191920: 29 January 1920 to 30 December 19201921: 3 January 1921 to 15 December 19211922: 8 January 1922 to 27 December 19221923: 7 January 1923 to 28 November 19231924: 14 January 1924 to 31 December 19241926: 3 January 1926 to 16 December 19261927: 18 January 1927 to 30 August 19271928: 6 January 1928 to 31 December 19281929: 4 January 1929 to 30 December 19291930: 1 January 1930 to 30 September 19301931: 6 January 1931 to 2 August 19311932: 24 January 1932 to 8 August 19321933: 13 January 1933 to 29 December 19331934: 2 January 1934 to 20 December 19341935: 6 January 1935 to 24 July 19351936: 1 January 1936 to 30 November 19361937: 27 January 1937 to 23 December 19371938: 10 January 1938 to 23 June 19381939: 1 January 1939 to 2 November 19391940: 7 January 1940 to 18 October 19401941: 9 February 1941 to 16 November 19411942: 3 January 1942 to 20 December 19421943: 27 January 1943 to 23 December 194319121916192019241929193319371941JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at S. Luis meeting 10 mm (0.39 in).
First to last qualifying date each year at S. Luis
YearFirst dateLast date
19121912-02-031912-12-16
19131913-01-051913-12-10
19141914-01-151914-07-07
19151915-01-231915-12-23
19161916-01-171916-12-31
19171917-01-031917-12-24
19181918-01-011918-12-31
19191919-01-011919-11-22
19201920-01-291920-12-30
19211921-01-031921-12-15
19221922-01-081922-12-27
19231923-01-071923-11-28
19241924-01-141924-12-31
19261926-01-031926-12-16
19271927-01-181927-08-30
19281928-01-061928-12-31
19291929-01-041929-12-30
19301930-01-011930-09-30
19311931-01-061931-08-02
19321932-01-241932-08-08
19331933-01-131933-12-29
19341934-01-021934-12-20
19351935-01-061935-07-24
19361936-01-011936-11-30
19371937-01-271937-12-23
19381938-01-101938-06-23
19391939-01-011939-11-02
19401940-01-071940-10-18
19411941-02-091941-11-16
19421942-01-031942-12-20
19431943-01-271943-12-23

Every Fixed Threshold

Fixed thresholds at S. Luis
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3189191746
25 mm (0.98 in): Days with 25 mm or more rain3143191712
50 mm (1.97 in): Days with 50 mm or more rain311919265
100 mm (3.94 in): Days with 100 mm or more rain15319342
200 mm (7.87 in): Days with 200 mm or more rain2119161

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

  • Data for S. Luis 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).