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

San Juan Tlacotenco Threshold Days by Year (MXN00017039)

8 fixed thresholds counted per year at San Juan Tlacotenco (MXN00017039): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for San Juan Tlacotenco Thresholds

  • San Juan Tlacotenco: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 2010 with 64.
  • San Juan Tlacotenco: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1981 with 29.
  • San Juan Tlacotenco: days with 50 mm (1.97 in) or more of precipitation in 34 years, most in 2008 with 11.
  • San Juan Tlacotenco: days with a maximum temperature at or above 30 C (86 F) in 13 years, most in 1998 with 32.
  • 8 fixed thresholds have at least one qualifying day at San Juan Tlacotenco.
13 years with a qualifying day
Days at or above 30 C (86 F) per year at San Juan Tlacotenco Days per year at San Juan Tlacotenco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1998. 0102030401978: 21983: 41984: 31988: 61991: 31993: 21994: 21995: 61998: 321999: 42001: 12002: 12003: 231978198419911994199820012003
Days per year at San Juan Tlacotenco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 32 in 1998.
Days at or above 30 C (86 F) per year at San Juan Tlacotenco
YearDaysDecade average
197822
198344.3
198434.3
198864.3
199138.2
199328.2
199428.2
199568.2
1998328.2
199948.2
200118.3
200218.3
2003238.3
First to last qualifying date each year at San Juan Tlacotenco For each year, a bar from the first to the last day at San Juan Tlacotenco meeting 30 C (86 F). 1978: 18 April 1978 to 8 May 19781983: 7 May 1983 to 22 May 19831984: 27 April 1984 to 29 April 19841988: 24 April 1988 to 20 May 19881991: 8 March 1991 to 23 April 19911993: 4 June 1993 to 5 June 19931994: 30 April 1994 to 2 May 19941995: 24 March 1995 to 10 May 19951998: 31 March 1998 to 3 June 19981999: 7 April 1999 to 30 April 19992001: 21 May 2001 to 21 May 20012002: 4 April 2002 to 4 April 20022003: 6 April 2003 to 30 June 20031978198419911994199820012003JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at San Juan Tlacotenco meeting 30 C (86 F).
First to last qualifying date each year at San Juan Tlacotenco
YearFirst dateLast date
19781978-04-181978-05-08
19831983-05-071983-05-22
19841984-04-271984-04-29
19881988-04-241988-05-20
19911991-03-081991-04-23
19931993-06-041993-06-05
19941994-04-301994-05-02
19951995-03-241995-05-10
19981998-03-311998-06-03
19991999-04-071999-04-30
20012001-05-212001-05-21
20022002-04-042002-04-04
20032003-04-062003-06-30

Every Fixed Threshold

Fixed thresholds at San Juan Tlacotenco
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days1332199823
90 F (32.2 C): Days1119981
0 C (32 F): Frost days (min4320093
10 mm (0.39 in): Days with 10 mm or more rain3464201048
25 mm (0.98 in): Days with 25 mm or more rain3429198119
50 mm (1.97 in): Days with 50 mm or more rain341120088
100 mm (3.94 in): Days with 100 mm or more rain6220112
200 mm (7.87 in): Days with 200 mm or more rain1120111

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1978.

Download the Data

  • Data for San Juan Tlacotenco 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).