Guillermo Prieto Threshold Days by Year (MXN00003122)

14 fixed thresholds counted per year at Guillermo Prieto (MXN00003122): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Guillermo Prieto Thresholds

Guillermo Prieto: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1983 with 12.
Guillermo Prieto: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1981 with 238.
Guillermo Prieto: days with a maximum temperature at or above 35 C (95 F) in 24 years, most in 1997 with 140.
Guillermo Prieto: days with a maximum temperature at or above 90 F (32.2 C) in 24 years, most in 1997 with 182.
14 fixed thresholds have at least one qualifying day at Guillermo Prieto.

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Guillermo Prieto with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 238 in 1981.

Days at or above 30 C (86 F) per year at Guillermo Prieto
Year	Days	Decade average
1981	238	167.1
1982	132	167.1
1983	111	167.1
1984	126	167.1
1985	168	167.1
1986	208	167.1
1987	198	167.1
1988	156	167.1
1991	111	166.7
1993	101	166.7
1994	122	166.7
1997	226	166.7
1998	221	166.7
1999	219	166.7
2000	214	196.6
2001	216	196.6
2002	218	196.6
2006	172	196.6
2007	174	196.6
2008	224	196.6
2009	158	196.6
2010	165	145
2011	139	145
2012	131	145

For each year, a bar from the first to the last day at Guillermo Prieto meeting 30 C (86 F).

First to last qualifying date each year at Guillermo Prieto
Year	First date	Last date
1981	1981-01-01	1981-12-22
1982	1982-02-21	1982-12-22
1983	1983-03-31	1983-10-23
1984	1984-03-20	1984-11-11
1985	1985-02-15	1985-12-31
1986	1986-01-25	1986-11-15
1987	1987-01-29	1987-11-20
1988	1988-02-27	1988-10-13
1991	1991-02-18	1991-11-26
1993	1993-05-17	1993-10-13
1994	1994-06-01	1994-11-20
1997	1997-01-02	1997-11-28
1998	1998-01-01	1998-12-31
1999	1999-01-13	1999-12-18
2000	2000-01-12	2000-12-22
2001	2001-01-04	2001-11-24
2002	2002-01-07	2002-11-11
2006	2006-01-07	2006-11-24
2007	2007-02-05	2007-12-17
2008	2008-01-02	2008-12-15
2009	2009-02-07	2009-11-29
2010	2010-03-19	2010-11-24
2011	2011-01-20	2011-11-30
2012	2012-04-09	2012-11-07

Every Fixed Threshold

Fixed thresholds at Guillermo Prieto
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	238	1981	131
35 C (95 F): Days	24	140	1997	58
40 C (104 F): Days	21	55	2002	3
45 C (113 F): Days	4	3	1997	2
90 F (32.2 C): Days	24	182	1997	85
100 F (37.8 C): Days	24	89	2002	16
110 F (43.3 C): Days	8	8	1998	2
0 C (32 F): Frost days (min	13	4	2001	1
20 C (68 F): Tropical nights (min	21	117	1993	7
25 C (77 F): Days with min	6	5	1993	3
10 mm (0.39 in): Days with 10 mm or more rain	25	12	1983	1
25 mm (0.98 in): Days with 25 mm or more rain	10	5	1983	2
50 mm (1.97 in): Days with 50 mm or more rain	6	1	1983	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1994	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1981.

Download the Data

Data for Guillermo Prieto 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Guillermo Prieto Threshold Days by Year (MXN00003122)

Key Facts for Guillermo Prieto Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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