Monclova Threshold Days by Year

12 fixed thresholds counted per year at Monclova (MXN00004021): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monclova Thresholds

Monclova: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 2011 with 352.
Monclova: days with a maximum temperature at or above 35 C (95 F) in 43 years, most in 2003 with 202.
Monclova: days with a maximum temperature at or above 90 F (32.2 C) in 43 years, most in 2011 with 313.
Monclova: days with a maximum temperature at or above 100 F (37.8 C) in 42 years, most in 1975 with 56.
12 fixed thresholds have at least one qualifying day at Monclova.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Monclova with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 352 in 2011.

Days at or above 30 C (86 F) per year at Monclova
Year	Days	Decade average
1965	304	279.6
1966	297	279.6
1967	294	279.6
1968	243	279.6
1969	260	279.6
1970	241	287.6
1971	273	287.6
1972	296	287.6
1973	289	287.6
1974	307	287.6
1975	268	287.6
1978	322	287.6
1979	305	287.6
1980	304	310.2
1981	293	310.2
1982	334	310.2
1983	301	310.2
1984	311	310.2
1985	326	310.2
1986	315	310.2
1987	306	310.2
1988	302	310.2
1989	310	310.2
1990	296	321.4
1991	321	321.4
1992	305	321.4
1993	331	321.4
1994	337	321.4
1995	334	321.4
1997	309	321.4
1998	323	321.4
1999	337	321.4
2000	348	316.4
2001	316	316.4
2002	239	316.4
2003	301	316.4
2004	322	316.4
2005	343	316.4
2006	323	316.4
2008	323	316.4
2009	333	316.4
2010	337	344.5
2011	352	344.5

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

First to last qualifying date each year at Monclova
Year	First date	Last date
1965	1965-01-01	1965-12-25
1966	1966-01-04	1966-12-31
1967	1967-01-01	1967-12-22
1968	1968-01-01	1968-12-31
1969	1969-01-18	1969-12-30
1970	1970-01-26	1970-12-22
1971	1971-01-15	1971-12-16
1972	1972-01-04	1972-12-29
1973	1973-01-04	1973-11-30
1974	1974-01-01	1974-12-24
1975	1975-01-31	1975-11-27
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-24
1980	1980-01-03	1980-12-24
1981	1981-01-01	1981-11-30
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-29
1984	1984-01-07	1984-12-31
1985	1985-01-01	1985-12-31
1986	1986-01-01	1986-12-31
1987	1987-01-03	1987-12-28
1988	1988-01-01	1988-12-31
1989	1989-01-01	1989-12-31
1990	1990-02-01	1990-12-31
1991	1991-01-01	1991-12-30
1992	1992-01-01	1992-12-30
1993	1993-01-03	1993-12-31
1994	1994-01-01	1994-12-31
1995	1995-01-03	1995-12-31
1997	1997-01-03	1997-12-26
1998	1998-01-07	1998-12-31
1999	1999-01-01	1999-12-31
2000	2000-01-01	2000-12-28
2001	2001-01-07	2001-12-12
2002	2002-03-15	2002-11-29
2003	2003-01-12	2003-11-30
2004	2004-01-01	2004-12-31
2005	2005-01-01	2005-12-29
2006	2006-01-01	2006-12-31
2008	2008-01-01	2008-12-31
2009	2009-01-01	2009-12-30
2010	2010-01-01	2010-12-31
2011	2011-01-01	2011-12-30

Every Fixed Threshold

Fixed thresholds at Monclova
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	352	2011	352
35 C (95 F): Days	43	202	2003	176
40 C (104 F): Days	29	22	1975	1
90 F (32.2 C): Days	43	313	2011	313
100 F (37.8 C): Days	42	56	1975	21
20 C (68 F): Tropical nights (min	41	336	1998	295
25 C (77 F): Days with min	25	95	1998	1
10 mm (0.39 in): Days with 10 mm or more rain	41	64	1979	37
25 mm (0.98 in): Days with 25 mm or more rain	39	25	1978	8
50 mm (1.97 in): Days with 50 mm or more rain	32	9	1989	3
100 mm (3.94 in): Days with 100 mm or more rain	16	3	1988	1
200 mm (7.87 in): Days with 200 mm or more rain	2	2	1987	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1965.

Download the Data

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

Monclova Threshold Days by Year

Key Facts for Monclova Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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