Izucar de Matamoros (Smn) Weather Records (MXN00021132)

Record envelope, standing records and threshold days for Izucar de Matamoros (Smn) (MXN00021132), Mexico, with 66 years of record.

Key Facts for Izucar de Matamoros (Smn)

Izucar de Matamoros (Smn) (MXN00021132) is a weather station in Mexico at 18.60 latitude and -98.47 longitude, 1,297 m (4,255 ft) above sea level.
The station reports from 1944 to 2009, 66 years of record.
1,464 records set at Izucar de Matamoros (Smn) still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Izucar de Matamoros (Smn) set a daily record low maximum temperature of 20.6 C (69.1 F) on 26 December 2009.

About the Station

Location: Mexico, 18.60 latitude, -98.47 longitude.
Elevation: 1,297 m (4,255 ft).
Period of record: 1944 to 2009, 66 years.
Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Izucar de Matamoros (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Izucar de Matamoros (Smn), with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Feb	37.2 C (99.0 F)	2.8 C (37.0 F)	n/a	n/a
Mar	44.4 C (111.9 F)	5.0 C (41.0 F)	n/a	n/a
Apr	42.8 C (109.0 F)	8.9 C (48.0 F)	n/a	n/a
May	45.0 C (113.0 F)	9.4 C (48.9 F)	n/a	n/a
Jun	40.0 C (104.0 F)	10.0 C (50.0 F)	n/a	n/a
Jul	39.4 C (102.9 F)	5.0 C (41.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	9.4 C (48.9 F)	n/a	n/a
Sep	38.9 C (102.0 F)	10.0 C (50.0 F)	n/a	n/a
Oct	35.6 C (96.1 F)	6.7 C (44.1 F)	n/a	n/a
Nov	37.8 C (100.0 F)	1.7 C (35.1 F)	n/a	n/a
Dec	37.2 C (99.0 F)	3.9 C (39.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Izucar de Matamoros (Smn) still stand. 1945 holds the most, with 133.

Standing records at Izucar de Matamoros (Smn) by the year they were set
Year set	Standing records
1944	49
1945	133
1946	126
1947	96
1948	16
1949	51
1950	17
1952	4
1953	71
1954	53
1955	74
1956	40
1957	14
1958	30
1959	15
1960	23
1961	14
1962	12
1963	16
1964	15
1965	27
1966	34
1967	36
1968	2
1973	41
1974	65
1975	9
1976	23
1977	21
1978	27
1979	47
1980	64
1981	6
1982	21
1987	48
2007	38
2008	41
2009	45

Wettest Day of Each Month

May: 209.8 mm (8.3 in)

The wettest day on record for each calendar month at Izucar de Matamoros (Smn). The most was 209.8 mm (8.3 in) on 22 May 1967.

Record daily precipitation for each month at Izucar de Matamoros (Smn)
Month	Record daily precipitation (mm)	Date
Jan	30.0 mm (1.2 in)	22 January 1965
Feb	19.8 mm (0.8 in)	21 February 1966
Mar	8.9 mm (0.35 in)	16 March 1978
Apr	99.8 mm (3.9 in)	16 April 1965
May	209.8 mm (8.3 in)	22 May 1967
Jun	194.8 mm (7.7 in)	16 June 1967
Jul	159.8 mm (6.3 in)	1 July 2009
Aug	179.8 mm (7.1 in)	14 August 1967
Sep	199.9 mm (7.9 in)	23 September 1967
Oct	159.8 mm (6.3 in)	16 October 1966
Nov	41.9 mm (1.6 in)	9 November 1952
Dec	21.8 mm (0.9 in)	11 December 1955

Period of Record Coverage

1944 to 2009

37 years of record at Izucar de Matamoros (Smn), 1944 to 2009. 8 years have data for under 90 percent of days and are left out of rankings: 1944, 1950, 1952, 1973, 1980, 1981, 1982, 1987.

Days with data per year at Izucar de Matamoros (Smn)
Year	Days with data	Share of year	Complete
1944	209	57%	No
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	273	75%	No
1952	92	25%	No
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	336	92%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	364	100%	Yes
1962	364	100%	Yes
1963	362	99%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	334	92%	Yes
1967	365	100%	Yes
1973	169	46%	No
1974	364	100%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	335	92%	Yes
1978	365	100%	Yes
1979	333	91%	Yes
1980	213	58%	No
1981	123	34%	No
1982	61	17%	No
1987	30	8%	No
2007	347	95%	Yes
2008	354	97%	Yes
2009	359	98%	Yes

Latest Records

Latest records at Izucar de Matamoros (Smn)
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 December 2009	Izucar de Matamoros (Smn), MX	daily low max	20.6 C (69.1 F)	4.4 C (7.9 F)	46 years	34 of 100 (Routine)
25 December 2009	Izucar de Matamoros (Smn), MX	daily low max (Tie)	25.0 C (77.0 F)	tie	55 years	5 of 100 (Routine)
24 December 2009	Izucar de Matamoros (Smn), MX	daily low max	22.8 C (73.0 F)	2.8 C (5.0 F)	55 years	32 of 100 (Routine)
23 December 2009	Izucar de Matamoros (Smn), MX	daily low max	23.9 C (75.0 F)	1.1 C (2.0 F)	55 years	25 of 100 (Routine)
22 December 2009	Izucar de Matamoros (Smn), MX	daily low max	23.9 C (75.0 F)	1.1 C (2.0 F)	55 years	25 of 100 (Routine)
21 December 2009	Izucar de Matamoros (Smn), MX	daily low max	21.7 C (71.1 F)	1.1 C (2.0 F)	55 years	25 of 100 (Routine)
20 December 2009	Izucar de Matamoros (Smn), MX	daily rain	7.9 mm (0.31 in)	7.9 mm (0.31 in)	64 years	20 of 100 (Routine)
20 December 2009	Izucar de Matamoros (Smn), MX	daily low max (Tie)	22.8 C (73.0 F)	tie	55 years	5 of 100 (Routine)
20 December 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	30 years	3 of 100 (Routine)
12 December 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	28 years	3 of 100 (Routine)
9 December 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	27 years	3 of 100 (Routine)
8 December 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	15.0 C (59.0 F)	tie	28 years	3 of 100 (Routine)
7 December 2009	Izucar de Matamoros (Smn), MX	daily high min	15.0 C (59.0 F)	0.6 C (1.1 F)	31 years	17 of 100 (Routine)
5 December 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	15.6 C (60.1 F)	tie	31 years	3 of 100 (Routine)
1 December 2009	Izucar de Matamoros (Smn), MX	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	64 years	20 of 100 (Routine)
3 November 2009	Izucar de Matamoros (Smn), MX	daily rain	14.0 mm (0.6 in)	13.2 mm (0.5 in)	51 years	20 of 100 (Routine)
2 November 2009	Izucar de Matamoros (Smn), MX	daily high min (Tie)	16.7 C (62.1 F)	tie	27 years	3 of 100 (Routine)
31 October 2009	Izucar de Matamoros (Smn), MX	daily low max (Tie)	25.6 C (78.1 F)	tie	48 years	5 of 100 (Routine)
30 October 2009	Izucar de Matamoros (Smn), MX	daily rain (Tie)	9.9 mm (0.39 in)	tie	64 years	6 of 100 (Routine)
30 October 2009	Izucar de Matamoros (Smn), MX	daily low max (Tie)	25.6 C (78.1 F)	tie	44 years	4 of 100 (Routine)

Climate Trend

25 complete years, 1945 to 2009

One stripe for each of 25 complete years at Izucar de Matamoros (Smn), 1945 to 2009. Blue stripes are years cooler than the station's own mean of 22.6 C (72.7 F); red stripes are warmer. The coolest year was 1955, at 20.8 C (69.4 F), and the warmest was 1946, at 24.8 C (76.6 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at Izucar de Matamoros (Smn) as warming stripes, 1945 to 2009
Year	Annual mean temperature	Difference from the station mean
1945	24.8 C	+2.19 C
1946	24.8 C	+2.21 C
1947	24.6 C	+2.03 C
1948	24.3 C	+1.70 C
1949	23.7 C	+1.09 C
1953	21.3 C	-1.33 C
1954	21.0 C	-1.55 C
1955	20.8 C	-1.82 C
1957	23.1 C	+0.50 C
1958	22.2 C	-0.43 C
1959	22.5 C	-0.14 C
1960	22.2 C	-0.44 C
1961	22.4 C	-0.18 C
1962	22.2 C	-0.44 C
1963	21.9 C	-0.70 C
1964	22.3 C	-0.33 C
1965	21.6 C	-1.01 C
1967	22.3 C	-0.33 C
1974	21.1 C	-1.47 C
1975	22.1 C	-0.50 C
1976	23.2 C	+0.62 C
1978	23.6 C	+1.02 C
2007	22.2 C	-0.41 C
2008	22.3 C	-0.34 C
2009	22.6 C	-0.01 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1944 to 2009

Yearly extremes at Izucar de Matamoros (Smn): the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	1949	37.8 C (100.0 F)	37
Coldest night (TNn)	1.7 C (35.1 F)	1987	5.0 C (41.0 F)	38
Wettest day (Rx1day)	209.8 mm (8.3 in)	1967	60.5 mm (2.4 in)	38
Wettest five days (Rx5day)	437.7 mm (17.2 in)	1967	111.4 mm (4.4 in)	38
Longest dry spell (CDD)	365 days	1974	82 days	38

Hottest day (TXx)

The hottest day of the year at Izucar de Matamoros (Smn), 1944 to 2009. The record is 45.0 C (113.0 F) in 1949, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Izucar de Matamoros (Smn) by year
Year	Hottest day (TXx)
1944	42.8 C (109.0 F)
1945	41.1 C (106.0 F)
1946	44.4 C (111.9 F)
1947	41.7 C (107.1 F)
1948	41.1 C (106.0 F)
1949	45.0 C (113.0 F)
1950	41.7 C (107.1 F)
1952	35.0 C (95.0 F)
1953	36.7 C (98.1 F)
1954	35.6 C (96.1 F)
1955	35.6 C (96.1 F)
1956	35.6 C (96.1 F)
1957	38.9 C (102.0 F)
1958	38.9 C (102.0 F)
1959	36.7 C (98.1 F)
1960	35.6 C (96.1 F)
1961	37.8 C (100.0 F)
1962	37.8 C (100.0 F)
1963	37.8 C (100.0 F)
1964	37.8 C (100.0 F)
1965	37.8 C (100.0 F)
1966	38.9 C (102.0 F)
1967	35.6 C (96.1 F)
1968	n/a
1973	35.6 C (96.1 F)
1974	36.7 C (98.1 F)
1975	36.7 C (98.1 F)
1976	37.8 C (100.0 F)
1977	38.3 C (100.9 F)
1978	40.0 C (104.0 F)
1979	37.8 C (100.0 F)
1980	35.6 C (96.1 F)
1981	38.9 C (102.0 F)
1982	37.2 C (99.0 F)
1987	20.6 C (69.1 F)
2007	35.0 C (95.0 F)
2008	36.7 C (98.1 F)
2009	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Izucar de Matamoros (Smn), 1944 to 2009. The record is 1.7 C (35.1 F) in 1987, marked on the chart; the median year is 5.0 C (41.0 F).

Coldest night (TNn) at Izucar de Matamoros (Smn) by year
Year	Coldest night (TNn)
1944	7.2 C (45.0 F)
1945	6.7 C (44.1 F)
1946	4.4 C (39.9 F)
1947	9.4 C (48.9 F)
1948	5.6 C (42.1 F)
1949	3.9 C (39.0 F)
1950	7.8 C (46.0 F)
1952	6.7 C (44.1 F)
1953	2.2 C (36.0 F)
1954	2.8 C (37.0 F)
1955	5.0 C (41.0 F)
1956	3.9 C (39.0 F)
1957	3.9 C (39.0 F)
1958	5.6 C (42.1 F)
1959	5.0 C (41.0 F)
1960	5.0 C (41.0 F)
1961	2.8 C (37.0 F)
1962	5.6 C (42.1 F)
1963	3.9 C (39.0 F)
1964	3.9 C (39.0 F)
1965	5.6 C (42.1 F)
1966	3.9 C (39.0 F)
1967	5.0 C (41.0 F)
1968	5.0 C (41.0 F)
1973	3.9 C (39.0 F)
1974	5.0 C (41.0 F)
1975	5.0 C (41.0 F)
1976	5.0 C (41.0 F)
1977	6.7 C (44.1 F)
1978	9.4 C (48.9 F)
1979	6.7 C (44.1 F)
1980	6.7 C (44.1 F)
1981	7.8 C (46.0 F)
1982	7.8 C (46.0 F)
1987	1.7 C (35.1 F)
2007	8.9 C (48.0 F)
2008	8.9 C (48.0 F)
2009	8.9 C (48.0 F)

Wettest day (Rx1day)

The wettest day of the year at Izucar de Matamoros (Smn), 1944 to 2009. The record is 209.8 mm (8.3 in) in 1967, marked on the chart; the median year is 60.5 mm (2.4 in).

Wettest day (Rx1day) at Izucar de Matamoros (Smn) by year
Year	Wettest day (Rx1day)
1944	72.4 mm (2.9 in)
1945	72.4 mm (2.9 in)
1946	49.8 mm (2.0 in)
1947	71.9 mm (2.8 in)
1948	41.4 mm (1.6 in)
1949	74.9 mm (2.9 in)
1950	64.8 mm (2.6 in)
1952	41.9 mm (1.6 in)
1953	74.9 mm (2.9 in)
1954	56.9 mm (2.2 in)
1955	51.8 mm (2.0 in)
1956	47.8 mm (1.9 in)
1957	81.8 mm (3.2 in)
1958	66.8 mm (2.6 in)
1959	71.9 mm (2.8 in)
1960	72.9 mm (2.9 in)
1961	45.0 mm (1.8 in)
1962	56.9 mm (2.2 in)
1963	75.9 mm (3.0 in)
1964	40.9 mm (1.6 in)
1965	125.0 mm (4.9 in)
1966	159.8 mm (6.3 in)
1967	209.8 mm (8.3 in)
1968	41.7 mm (1.6 in)
1973	0.0 mm (0.00 in)
1974	0.0 mm (0.00 in)
1975	49.8 mm (2.0 in)
1976	89.9 mm (3.5 in)
1977	61.0 mm (2.4 in)
1978	65.8 mm (2.6 in)
1979	30.0 mm (1.2 in)
1980	26.4 mm (1.0 in)
1981	31.8 mm (1.3 in)
1982	0.0 mm (0.00 in)
1987	0.0 mm (0.00 in)
2007	63.0 mm (2.5 in)
2008	59.9 mm (2.4 in)
2009	159.8 mm (6.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Izucar de Matamoros (Smn), 1944 to 2009. The record is 437.7 mm (17.2 in) in 1967, marked on the chart; the median year is 111.4 mm (4.4 in).

Wettest five days (Rx5day) at Izucar de Matamoros (Smn) by year
Year	Wettest five days (Rx5day)
1944	113.3 mm (4.5 in)
1945	122.4 mm (4.8 in)
1946	91.1 mm (3.6 in)
1947	119.1 mm (4.7 in)
1948	82.7 mm (3.3 in)
1949	179.6 mm (7.1 in)
1950	150.6 mm (5.9 in)
1952	49.8 mm (2.0 in)
1953	134.3 mm (5.3 in)
1954	108.5 mm (4.3 in)
1955	109.5 mm (4.3 in)
1956	104.2 mm (4.1 in)
1957	94.0 mm (3.7 in)
1958	124.8 mm (4.9 in)
1959	146.4 mm (5.8 in)
1960	95.5 mm (3.8 in)
1961	118.3 mm (4.7 in)
1962	139.5 mm (5.5 in)
1963	114.3 mm (4.5 in)
1964	77.7 mm (3.1 in)
1965	301.3 mm (11.9 in)
1966	274.4 mm (10.8 in)
1967	437.7 mm (17.2 in)
1968	41.7 mm (1.6 in)
1973	0.0 mm (0.00 in)
1974	0.0 mm (0.00 in)
1975	82.8 mm (3.3 in)
1976	156.5 mm (6.2 in)
1977	127.2 mm (5.0 in)
1978	158.3 mm (6.2 in)
1979	79.2 mm (3.1 in)
1980	32.3 mm (1.3 in)
1981	43.7 mm (1.7 in)
1982	0.0 mm (0.00 in)
1987	0.0 mm (0.00 in)
2007	117.4 mm (4.6 in)
2008	98.3 mm (3.9 in)
2009	185.3 mm (7.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Izucar de Matamoros (Smn), 1944 to 2009. The record is 365 days in 1974, marked on the chart; the median year is 82 days.

Longest dry spell (CDD) at Izucar de Matamoros (Smn) by year
Year	Longest dry spell (CDD)
1944	72 days
1945	78 days
1946	53 days
1947	85 days
1948	58 days
1949	103 days
1950	110 days
1952	49 days
1953	142 days
1954	100 days
1955	84 days
1956	109 days
1957	103 days
1958	79 days
1959	99 days
1960	102 days
1961	102 days
1962	101 days
1963	65 days
1964	129 days
1965	83 days
1966	51 days
1967	98 days
1968	19 days
1973	170 days
1974	365 days
1975	129 days
1976	75 days
1977	62 days
1978	80 days
1979	77 days
1980	64 days
1981	23 days
1982	61 days
1987	30 days
2007	70 days
2008	111 days
2009	77 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

Data for Izucar de Matamoros (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Izucar de Matamoros (Smn) 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). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).