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

Piedras Negras Threshold Days by Year (MXN00021185)

12 fixed thresholds counted per year at Piedras Negras (MXN00021185): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Piedras Negras Thresholds

  • Piedras Negras: days with a maximum temperature at or above 30 C (86 F) in 8 years, most in 1985 with 242.
  • Piedras Negras: days with a maximum temperature at or above 90 F (32.2 C) in 8 years, most in 1986 with 162.
  • Piedras Negras: days with 10 mm (0.39 in) or more of precipitation in 8 years, most in 1984 with 55.
  • Piedras Negras: days with 25 mm (0.98 in) or more of precipitation in 8 years, most in 1984 with 27.
  • 12 fixed thresholds have at least one qualifying day at Piedras Negras.
8 years with a qualifying day
Days at or above 30 C (86 F) per year at Piedras Negras Days per year at Piedras Negras with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 242 in 1985. 01002003001984: 2041985: 2421986: 2351987: 2202005: 602007: 1802008: 1682009: 20519841985198619872005200720082009
Days per year at Piedras Negras with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 242 in 1985.
Days at or above 30 C (86 F) per year at Piedras Negras
YearDaysDecade average
1984204225.3
1985242225.3
1986235225.3
1987220225.3
200560153.3
2007180153.3
2008168153.3
2009205153.3
First to last qualifying date each year at Piedras Negras For each year, a bar from the first to the last day at Piedras Negras meeting 30 C (86 F). 1984: 9 January 1984 to 31 December 19841985: 27 January 1985 to 31 December 19851986: 19 January 1986 to 9 December 19861987: 15 January 1987 to 25 December 19872005: 15 June 2005 to 23 October 20052007: 4 April 2007 to 22 November 20072008: 3 March 2008 to 27 December 20082009: 2 April 2009 to 23 December 200919841985198619872005200720082009JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Piedras Negras meeting 30 C (86 F).
First to last qualifying date each year at Piedras Negras
YearFirst dateLast date
19841984-01-091984-12-31
19851985-01-271985-12-31
19861986-01-191986-12-09
19871987-01-151987-12-25
20052005-06-152005-10-23
20072007-04-042007-11-22
20082008-03-032008-12-27
20092009-04-022009-12-23

Every Fixed Threshold

Fixed thresholds at Piedras Negras
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days82421985205
35 C (95 F): Days746198745
40 C (104 F): Days21219842
90 F (32.2 C): Days81621986149
100 F (37.8 C): Days51419847
110 F (43.3 C): Days1219842
20 C (68 F): Tropical nights (min71981986120
25 C (77 F): Days with min5619876
10 mm (0.39 in): Days with 10 mm or more rain855198427
25 mm (0.98 in): Days with 25 mm or more rain827198413
50 mm (1.97 in): Days with 50 mm or more rain81119843
100 mm (3.94 in): Days with 100 mm or more rain2119851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1984.

Download the Data

  • Data for Piedras Negras 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).