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Built 2026-10-19 (19 October 2026)

Rayon Threshold Days by Year (MXN00026181)

14 fixed thresholds counted per year at Rayon (MXN00026181): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rayon Thresholds

  • Rayon: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1999 with 257.
  • Rayon: days with a maximum temperature at or above 35 C (95 F) in 31 years, most in 1998 with 158.
  • Rayon: days with a maximum temperature at or above 40 C (104 F) in 31 years, most in 1997 with 64.
  • Rayon: days with a maximum temperature at or above 90 F (32.2 C) in 31 years, most in 1974 with 194.
  • 14 fixed thresholds have at least one qualifying day at Rayon.
31 years with a qualifying day
Days at or above 30 C (86 F) per year at Rayon Days per year at Rayon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 257 in 1999. 01002003001974: 2231975: 2201976: 1931977: 2051978: 1931979: 1931980: 1761981: 2171982: 2161983: 1641984: 1911985: 1961990: 2121993: 1871994: 2091995: 2291996: 2441997: 2171998: 2181999: 2572000: 2132003: 2132004: 2062005: 2172006: 2182007: 2232008: 2292009: 2232010: 2112011: 2272012: 23819741978198219901996200020062010
Days per year at Rayon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 257 in 1999.
Days at or above 30 C (86 F) per year at Rayon
YearDaysDecade average
1974223204.5
1975220204.5
1976193204.5
1977205204.5
1978193204.5
1979193204.5
1980176193.3
1981217193.3
1982216193.3
1983164193.3
1984191193.3
1985196193.3
1990212221.6
1993187221.6
1994209221.6
1995229221.6
1996244221.6
1997217221.6
1998218221.6
1999257221.6
2000213217.8
2003213217.8
2004206217.8
2005217217.8
2006218217.8
2007223217.8
2008229217.8
2009223217.8
2010211225.3
2011227225.3
2012238225.3
First to last qualifying date each year at Rayon For each year, a bar from the first to the last day at Rayon meeting 30 C (86 F). 1974: 23 February 1974 to 21 November 19741975: 14 January 1975 to 8 December 19751976: 15 January 1976 to 10 November 19761977: 14 February 1977 to 7 December 19771978: 16 March 1978 to 8 November 19781979: 13 February 1979 to 4 December 19791980: 2 February 1980 to 29 December 19801981: 16 February 1981 to 20 December 19811982: 9 January 1982 to 15 November 19821983: 2 April 1983 to 16 November 19831984: 8 March 1984 to 15 November 19841985: 13 February 1985 to 7 November 19851990: 11 January 1990 to 6 December 19901993: 7 March 1993 to 8 December 19931994: 1 March 1994 to 1 December 19941995: 25 January 1995 to 12 December 19951996: 9 January 1996 to 9 December 19961997: 5 March 1997 to 8 November 19971998: 11 March 1998 to 26 November 19981999: 18 January 1999 to 2 December 19992000: 12 January 2000 to 18 October 20002003: 23 January 2003 to 5 December 20032004: 18 February 2004 to 13 December 20042005: 10 March 2005 to 22 December 20052006: 5 January 2006 to 26 December 20062007: 8 January 2007 to 4 December 20072008: 9 February 2008 to 24 November 20082009: 20 January 2009 to 12 November 20092010: 17 March 2010 to 13 December 20102011: 13 February 2011 to 30 December 20112012: 1 January 2012 to 6 December 201219741978198219901996200020062010JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Rayon meeting 30 C (86 F).
First to last qualifying date each year at Rayon
YearFirst dateLast date
19741974-02-231974-11-21
19751975-01-141975-12-08
19761976-01-151976-11-10
19771977-02-141977-12-07
19781978-03-161978-11-08
19791979-02-131979-12-04
19801980-02-021980-12-29
19811981-02-161981-12-20
19821982-01-091982-11-15
19831983-04-021983-11-16
19841984-03-081984-11-15
19851985-02-131985-11-07
19901990-01-111990-12-06
19931993-03-071993-12-08
19941994-03-011994-12-01
19951995-01-251995-12-12
19961996-01-091996-12-09
19971997-03-051997-11-08
19981998-03-111998-11-26
19991999-01-181999-12-02
20002000-01-122000-10-18
20032003-01-232003-12-05
20042004-02-182004-12-13
20052005-03-102005-12-22
20062006-01-052006-12-26
20072007-01-082007-12-04
20082008-02-092008-11-24
20092009-01-202009-11-12
20102010-03-172010-12-13
20112011-02-132011-12-30
20122012-01-012012-12-06

Every Fixed Threshold

Fixed thresholds at Rayon
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days312571999238
35 C (95 F): Days311581998135
40 C (104 F): Days3164199738
45 C (113 F): Days5519981
90 F (32.2 C): Days311941974181
100 F (37.8 C): Days31104199676
110 F (43.3 C): Days211219983
0 C (32 F): Frost days (min252920117
20 C (68 F): Tropical nights (min31111199384
25 C (77 F): Days with min286519933
10 mm (0.39 in): Days with 10 mm or more rain3128198413
25 mm (0.98 in): Days with 25 mm or more rain301220003
50 mm (1.97 in): Days with 50 mm or more rain22620001
100 mm (3.94 in): Days with 100 mm or more rain4119941

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1974.

Download the Data

  • Data for Rayon 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).