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Built 2026-10-19 (19 October 2026)

San Luis 1 S Threshold Days by Year (USC00057428)

12 fixed thresholds counted per year at San Luis 1 S (USC00057428): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Luis 1 S Thresholds

  • San Luis 1 S: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 1908 with 242.
  • San Luis 1 S: nights with a minimum temperature at or below -10 C (14 F) in 26 years, most in 1895 with 124.
  • San Luis 1 S: nights with a minimum temperature at or below -20 C (-4 F) in 26 years, most in 1897 with 50.
  • San Luis 1 S: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1913 with 45.
  • 12 fixed thresholds have at least one qualifying day at San Luis 1 S.
18 years with a qualifying day
Days at or above 30 C (86 F) per year at San Luis 1 S Days per year at San Luis 1 S with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 1895. 02040601893: 91894: 201895: 501896: 441897: 191898: 31899: 111900: 151901: 191902: 81903: 51909: 51910: 121911: 11912: 41917: 11918: 11922: 4189318951897189919011903191019121918
Days per year at San Luis 1 S with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 50 in 1895.
Days at or above 30 C (86 F) per year at San Luis 1 S
YearDaysDecade average
1893922.3
18942022.3
18955022.3
18964422.3
18971922.3
1898322.3
18991122.3
19001510.4
19011910.4
1902810.4
1903510.4
1909510.4
1910123.8
191113.8
191243.8
191713.8
191813.8
192244
First to last qualifying date each year at San Luis 1 S For each year, a bar from the first to the last day at San Luis 1 S meeting 30 C (86 F). 1893: 10 June 1893 to 30 June 18931894: 13 June 1894 to 13 August 18941895: 14 June 1895 to 18 September 18951896: 26 May 1896 to 2 October 18961897: 23 June 1897 to 4 September 18971898: 27 June 1898 to 30 July 18981899: 18 June 1899 to 6 September 18991900: 7 June 1900 to 27 August 19001901: 19 May 1901 to 13 August 19011902: 23 June 1902 to 3 August 19021903: 28 June 1903 to 22 July 19031909: 24 June 1909 to 30 July 19091910: 19 June 1910 to 27 July 19101911: 19 August 1911 to 19 August 19111912: 4 June 1912 to 26 August 19121917: 30 June 1917 to 30 June 19171918: 11 June 1918 to 11 June 19181922: 22 June 1922 to 17 July 1922189318961899190219101917JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at San Luis 1 S meeting 30 C (86 F).
First to last qualifying date each year at San Luis 1 S
YearFirst dateLast date
18931893-06-101893-06-30
18941894-06-131894-08-13
18951895-06-141895-09-18
18961896-05-261896-10-02
18971897-06-231897-09-04
18981898-06-271898-07-30
18991899-06-181899-09-06
19001900-06-071900-08-27
19011901-05-191901-08-13
19021902-06-231902-08-03
19031903-06-281903-07-22
19091909-06-241909-07-30
19101910-06-191910-07-27
19111911-08-191911-08-19
19121912-06-041912-08-26
19171917-06-301917-06-30
19181918-06-111918-06-11
19221922-06-221922-07-17

Every Fixed Threshold

Fixed thresholds at San Luis 1 S
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days185018954
35 C (95 F): Days2618966
90 F (32.2 C): Days82218951
0 C (32 F): Ice days (max2545191335
0 C (32 F): Frost days (min262421908212
-10 C (14 F): Days with min26124189585
-20 C (-4 F): Days with min2650189713
-30 C (-22 F): Days with min14818954
10 mm (0.39 in): Days with 10 mm or more rain241618954
25 mm (0.98 in): Days with 25 mm or more rain16218981
10 cm (3.9 in): Days with 10 cm or more snowfall6519082
25 cm (9.8 in): Days with 25 cm or more snowfall1119151

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

  • Data for San Luis 1 S 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).