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Data as of 2025-12-31
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Built 2026-10-16 (16 October 2026)

San Threshold Days by Year

9 fixed thresholds counted per year at San (MLM00061277): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Thresholds

  • San: days with a maximum temperature at or above 30 C (86 F) in 2 years, most in 2016 with 349.
  • San: days with a maximum temperature at or above 35 C (95 F) in 2 years, most in 2016 with 243.
  • San: days with a maximum temperature at or above 40 C (104 F) in 2 years, most in 2017 with 83.
  • San: days with a maximum temperature at or above 90 F (32.2 C) in 2 years, most in 2016 with 316.
  • 9 fixed thresholds have at least one qualifying day at San.
2 years with a qualifying day
Days at or above 30 C (86 F) per year at San Days per year at San with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 349 in 2016. 01002003004002016: 3492017: 34320162017
Days per year at San with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 349 in 2016.
Days at or above 30 C (86 F) per year at San
YearDaysDecade average
2016349346
2017343346
First to last qualifying date each year at San For each year, a bar from the first to the last day at San meeting 30 C (86 F). 2016: 1 January 2016 to 31 December 20162017: 1 January 2017 to 31 December 201720162017JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at San meeting 30 C (86 F).
First to last qualifying date each year at San
YearFirst dateLast date
20162016-01-012016-12-31
20172017-01-012017-12-31

Every Fixed Threshold

Fixed thresholds at San
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days23492016343
35 C (95 F): Days22432016232
40 C (104 F): Days283201783
45 C (113 F): Days1120161
90 F (32.2 C): Days23162016315
100 F (37.8 C): Days21542016149
110 F (43.3 C): Days21720165
20 C (68 F): Tropical nights (min22612016253
25 C (77 F): Days with min21252017125

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2016.

Download the Data

  • Data for San 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).