Alamo Weather Records (MXN00030006)

Record envelope, standing records and threshold days for Alamo (MXN00030006), Mexico, with 47 years of record.

Key Facts for Alamo

Alamo (MXN00030006) is a weather station in Mexico at 20.92 latitude and -97.67 longitude, 19 m (62 ft) above sea level.
The station reports from 1965 to 2011, 47 years of record.
1,464 records set at Alamo still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Alamo tied a daily record precipitation of 10.9 mm (0.4 in) on 16 December 2011.

About the Station

Location: Mexico, 20.92 latitude, -97.67 longitude.
Elevation: 19 m (62 ft).
Period of record: 1965 to 2011, 47 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 Alamo. 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 Alamo, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	36.7 C (98.1 F)	2.8 C (37.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	4.4 C (39.9 F)	n/a	n/a
Mar	40.0 C (104.0 F)	6.1 C (43.0 F)	n/a	n/a
Apr	45.6 C (114.1 F)	7.2 C (45.0 F)	n/a	n/a
May	45.6 C (114.1 F)	10.6 C (51.1 F)	n/a	n/a
Jun	45.0 C (113.0 F)	15.0 C (59.0 F)	n/a	n/a
Jul	42.8 C (109.0 F)	15.0 C (59.0 F)	n/a	n/a
Aug	41.7 C (107.1 F)	15.0 C (59.0 F)	n/a	n/a
Sep	38.3 C (100.9 F)	11.7 C (53.1 F)	n/a	n/a
Oct	38.9 C (102.0 F)	8.9 C (48.0 F)	n/a	n/a
Nov	37.8 C (100.0 F)	8.9 C (48.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	0.0 C (32.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Alamo still stand. 1980 holds the most, with 102.

Standing records at Alamo by the year they were set
Year set	Standing records
1978	48
1979	96
1980	102
1981	64
1982	49
1983	63
1984	43
1985	33
1986	39
1987	74
1988	18
1989	67
1990	30
1991	33
1992	55
1993	48
1994	76
1995	26
1996	25
1997	51
1998	74
1999	39
2000	36
2001	22
2002	5
2005	51
2006	26
2007	22
2008	29
2009	37
2010	37
2011	46

All-Time Record Progression

1 new records

1 all-time records were set at Alamo between 4 February 2011 and 4 February 2011. Each dot is a new record.

Wettest Day of Each Month

Jun: 247.4 mm (9.7 in)

The wettest day on record for each calendar month at Alamo. The most was 247.4 mm (9.7 in) on 16 June 1981.

Record daily precipitation for each month at Alamo
Month	Record daily precipitation (mm)	Date
Jan	117.3 mm (4.6 in)	29 January 1975
Feb	84.8 mm (3.3 in)	11 February 1999
Mar	93.0 mm (3.7 in)	30 March 1969
Apr	111.8 mm (4.4 in)	27 April 2008
May	120.9 mm (4.8 in)	15 May 1967
Jun	247.4 mm (9.7 in)	16 June 1981
Jul	161.5 mm (6.4 in)	4 July 1974
Aug	192.8 mm (7.6 in)	30 August 2007
Sep	188.2 mm (7.4 in)	17 September 1981
Oct	159.8 mm (6.3 in)	4 October 1999
Nov	95.0 mm (3.7 in)	9 November 2011
Dec	85.1 mm (3.4 in)	10 December 1973

Period of Record Coverage

1978 to 2011

32 years of record at Alamo, 1978 to 2011. 4 years have data for under 90 percent of days and are left out of rankings: 1978, 1988, 2002, 2005.

Days with data per year at Alamo
Year	Days with data	Share of year	Complete
1978	301	82%	No
1979	357	98%	Yes
1980	358	98%	Yes
1981	362	99%	Yes
1982	362	99%	Yes
1983	353	97%	Yes
1984	356	97%	Yes
1985	360	99%	Yes
1986	361	99%	Yes
1987	331	91%	Yes
1988	227	62%	No
1989	365	100%	Yes
1990	334	92%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	364	100%	Yes
1996	364	99%	Yes
1997	359	98%	Yes
1998	365	100%	Yes
1999	359	98%	Yes
2000	353	96%	Yes
2001	359	98%	Yes
2002	59	16%	No
2005	325	89%	No
2006	330	90%	Yes
2007	362	99%	Yes
2008	362	99%	Yes
2009	362	99%	Yes
2010	349	96%	Yes
2011	360	99%	Yes

Latest Records

Latest records at Alamo
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 December 2011	Alamo, MX	daily rain (Tie)	10.9 mm (0.4 in)	tie	1 year	1 of 100 (Routine)
15 December 2011	Alamo, MX	daily high min (Tie)	20.0 C (68.0 F)	tie	20 years	2 of 100 (Routine)
7 December 2011	Alamo, MX	daily low min	10.0 C (50.0 F)	1.7 C (3.1 F)	32 years	16 of 100 (Routine)
6 December 2011	Alamo, MX	daily low max	16.7 C (62.1 F)	1.6 C (2.9 F)	0 years	6 of 100 (Routine)
1 December 2011	Alamo, MX	daily low min	9.4 C (48.9 F)	1.2 C (2.2 F)	32 years	15 of 100 (Routine)
10 November 2011	Alamo, MX	daily low min (Tie)	12.8 C (55.0 F)	tie	0 years	0 of 100 (Routine)
9 November 2011	Alamo, MX	monthly rain	95.0 mm (3.7 in)	21.8 mm (0.9 in)	33 years	45 of 100 (Notable)
4 November 2011	Alamo, MX	daily low max	24.4 C (75.9 F)	0.6 C (1.1 F)	1 year	4 of 100 (Routine)
21 October 2011	Alamo, MX	daily low min	12.2 C (54.0 F)	1.7 C (3.1 F)	12 years	12 of 100 (Routine)
20 October 2011	Alamo, MX	daily low min	11.7 C (53.1 F)	1.1 C (2.0 F)	13 years	11 of 100 (Routine)
28 September 2011	Alamo, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	32 years	3 of 100 (Routine)
27 September 2011	Alamo, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	32 years	3 of 100 (Routine)
15 September 2011	Alamo, MX	daily low max	23.9 C (75.0 F)	5.0 C (9.0 F)	26 years	28 of 100 (Routine)
11 September 2011	Alamo, MX	daily low max	25.6 C (78.1 F)	3.8 C (6.8 F)	26 years	24 of 100 (Routine)
11 September 2011	Alamo, MX	daily low min (Tie)	18.9 C (66.0 F)	tie	22 years	2 of 100 (Routine)
9 September 2011	Alamo, MX	daily low min (Tie)	17.8 C (64.0 F)	tie	20 years	2 of 100 (Routine)
5 September 2011	Alamo, MX	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	25 years	13 of 100 (Routine)
22 August 2011	Alamo, MX	daily low max	28.3 C (82.9 F)	0.6 C (1.1 F)	26 years	13 of 100 (Routine)
13 August 2011	Alamo, MX	monthly high min (Tie)	26.1 C (79.0 F)	tie	31 years	5 of 100 (Routine)
12 August 2011	Alamo, MX	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	24 years	14 of 100 (Routine)

Climate Trend

25 complete years, 1979 to 2011

One stripe for each of 25 complete years at Alamo, 1979 to 2011. Blue stripes are years cooler than the station's own mean of 25.0 C (77.0 F); red stripes are warmer. The coolest year was 2010, at 23.4 C (74.1 F), and the warmest was 1994, at 27.0 C (80.7 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Alamo as warming stripes, 1979 to 2011
Year	Annual mean temperature	Difference from the station mean
1979	24.2 C	-0.82 C
1980	24.9 C	-0.08 C
1981	24.7 C	-0.28 C
1982	24.6 C	-0.39 C
1983	24.5 C	-0.53 C
1984	24.2 C	-0.85 C
1985	24.4 C	-0.59 C
1986	24.3 C	-0.70 C
1989	24.4 C	-0.59 C
1991	26.4 C	+1.44 C
1992	26.8 C	+1.80 C
1993	26.7 C	+1.74 C
1994	27.0 C	+2.03 C
1995	26.8 C	+1.77 C
1996	26.0 C	+1.01 C
1997	24.5 C	-0.47 C
1998	25.9 C	+0.86 C
1999	25.4 C	+0.40 C
2000	24.3 C	-0.69 C
2001	24.0 C	-1.01 C
2007	24.2 C	-0.82 C
2008	24.1 C	-0.88 C
2009	24.7 C	-0.30 C
2010	23.4 C	-1.62 C
2011	24.6 C	-0.36 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

1965 to 2011

Yearly extremes at Alamo: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.6 C (114.1 F)	1980	40.0 C (104.0 F)	32
Coldest night (TNn)	0.0 C (32.0 F)	1983	6.7 C (44.1 F)	32
Wettest day (Rx1day)	247.4 mm (9.7 in)	1981	95.8 mm (3.8 in)	47
Wettest five days (Rx5day)	410.2 mm (16.1 in)	2007	169.7 mm (6.7 in)	47
Longest dry spell (CDD)	85 days	2011	37 days	47

Hottest day (TXx)

The hottest day of the year at Alamo, 1965 to 2011. The record is 45.6 C (114.1 F) in 1980, marked on the chart; the median year is 40.0 C (104.0 F).

Hottest day (TXx) at Alamo by year
Year	Hottest day (TXx)
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	45.0 C (113.0 F)
1979	42.8 C (109.0 F)
1980	45.6 C (114.1 F)
1981	41.1 C (106.0 F)
1982	40.0 C (104.0 F)
1983	38.9 C (102.0 F)
1984	43.9 C (111.0 F)
1985	39.4 C (102.9 F)
1986	35.0 C (95.0 F)
1987	36.1 C (97.0 F)
1988	40.0 C (104.0 F)
1989	40.0 C (104.0 F)
1990	45.0 C (113.0 F)
1991	37.8 C (100.0 F)
1992	38.9 C (102.0 F)
1993	37.8 C (100.0 F)
1994	37.8 C (100.0 F)
1995	41.7 C (107.1 F)
1996	40.6 C (105.1 F)
1997	38.9 C (102.0 F)
1998	45.6 C (114.1 F)
1999	42.8 C (109.0 F)
2000	38.9 C (102.0 F)
2001	40.0 C (104.0 F)
2002	32.8 C (91.0 F)
2003	n/a
2004	n/a
2005	45.0 C (113.0 F)
2006	40.0 C (104.0 F)
2007	35.6 C (96.1 F)
2008	39.4 C (102.9 F)
2009	40.0 C (104.0 F)
2010	39.4 C (102.9 F)
2011	45.0 C (113.0 F)

Coldest night (TNn)

The coldest night of the year at Alamo, 1965 to 2011. The record is 0.0 C (32.0 F) in 1983, marked on the chart; the median year is 6.7 C (44.1 F).

Coldest night (TNn) at Alamo by year
Year	Coldest night (TNn)
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	6.7 C (44.1 F)
1979	5.0 C (41.0 F)
1980	7.2 C (45.0 F)
1981	6.7 C (44.1 F)
1982	5.6 C (42.1 F)
1983	0.0 C (32.0 F)
1984	7.2 C (45.0 F)
1985	3.9 C (39.0 F)
1986	5.0 C (41.0 F)
1987	6.1 C (43.0 F)
1988	9.4 C (48.9 F)
1989	0.0 C (32.0 F)
1990	11.7 C (53.1 F)
1991	16.7 C (62.1 F)
1992	16.7 C (62.1 F)
1993	16.7 C (62.1 F)
1994	17.8 C (64.0 F)
1995	15.6 C (60.1 F)
1996	5.6 C (42.1 F)
1997	5.0 C (41.0 F)
1998	8.9 C (48.0 F)
1999	10.0 C (50.0 F)
2000	6.7 C (44.1 F)
2001	8.9 C (48.0 F)
2002	6.7 C (44.1 F)
2003	n/a
2004	n/a
2005	9.4 C (48.9 F)
2006	5.6 C (42.1 F)
2007	6.7 C (44.1 F)
2008	6.7 C (44.1 F)
2009	7.2 C (45.0 F)
2010	2.8 C (37.0 F)
2011	4.4 C (39.9 F)

Wettest day (Rx1day)

The wettest day of the year at Alamo, 1965 to 2011. The record is 247.4 mm (9.7 in) in 1981, marked on the chart; the median year is 95.8 mm (3.8 in).

Wettest day (Rx1day) at Alamo by year
Year	Wettest day (Rx1day)
1965	42.7 mm (1.7 in)
1966	139.4 mm (5.5 in)
1967	120.9 mm (4.8 in)
1968	78.5 mm (3.1 in)
1969	93.0 mm (3.7 in)
1970	95.3 mm (3.8 in)
1971	78.0 mm (3.1 in)
1972	89.7 mm (3.5 in)
1973	109.5 mm (4.3 in)
1974	161.5 mm (6.4 in)
1975	187.5 mm (7.4 in)
1976	89.7 mm (3.5 in)
1977	73.2 mm (2.9 in)
1978	178.1 mm (7.0 in)
1979	73.2 mm (2.9 in)
1980	130.0 mm (5.1 in)
1981	247.4 mm (9.7 in)
1982	113.8 mm (4.5 in)
1983	97.8 mm (3.9 in)
1984	138.9 mm (5.5 in)
1985	142.5 mm (5.6 in)
1986	42.9 mm (1.7 in)
1987	60.2 mm (2.4 in)
1988	99.8 mm (3.9 in)
1989	64.3 mm (2.5 in)
1990	97.8 mm (3.9 in)
1991	30.5 mm (1.2 in)
1992	37.8 mm (1.5 in)
1993	60.5 mm (2.4 in)
1994	48.5 mm (1.9 in)
1995	39.6 mm (1.6 in)
1996	80.3 mm (3.2 in)
1997	116.3 mm (4.6 in)
1998	119.9 mm (4.7 in)
1999	159.8 mm (6.3 in)
2000	128.8 mm (5.1 in)
2001	79.8 mm (3.1 in)
2002	117.9 mm (4.6 in)
2003	74.9 mm (2.9 in)
2004	95.8 mm (3.8 in)
2005	86.9 mm (3.4 in)
2006	165.9 mm (6.5 in)
2007	192.8 mm (7.6 in)
2008	111.8 mm (4.4 in)
2009	79.0 mm (3.1 in)
2010	80.8 mm (3.2 in)
2011	140.0 mm (5.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Alamo, 1965 to 2011. The record is 410.2 mm (16.1 in) in 2007, marked on the chart; the median year is 169.7 mm (6.7 in).

Wettest five days (Rx5day) at Alamo by year
Year	Wettest five days (Rx5day)
1965	102.4 mm (4.0 in)
1966	391.8 mm (15.4 in)
1967	228.1 mm (9.0 in)
1968	156.5 mm (6.2 in)
1969	178.0 mm (7.0 in)
1970	166.5 mm (6.6 in)
1971	141.3 mm (5.6 in)
1972	156.3 mm (6.2 in)
1973	217.7 mm (8.6 in)
1974	350.6 mm (13.8 in)
1975	390.6 mm (15.4 in)
1976	255.4 mm (10.1 in)
1977	106.2 mm (4.2 in)
1978	250.3 mm (9.9 in)
1979	162.9 mm (6.4 in)
1980	184.9 mm (7.3 in)
1981	383.3 mm (15.1 in)
1982	145.9 mm (5.7 in)
1983	108.2 mm (4.3 in)
1984	313.4 mm (12.3 in)
1985	181.8 mm (7.2 in)
1986	71.0 mm (2.8 in)
1987	104.2 mm (4.1 in)
1988	288.0 mm (11.3 in)
1989	134.4 mm (5.3 in)
1990	195.6 mm (7.7 in)
1991	63.5 mm (2.5 in)
1992	74.7 mm (2.9 in)
1993	119.4 mm (4.7 in)
1994	114.1 mm (4.5 in)
1995	80.7 mm (3.2 in)
1996	229.9 mm (9.1 in)
1997	143.7 mm (5.7 in)
1998	125.0 mm (4.9 in)
1999	301.4 mm (11.9 in)
2000	189.2 mm (7.4 in)
2001	160.8 mm (6.3 in)
2002	338.6 mm (13.3 in)
2003	192.7 mm (7.6 in)
2004	113.1 mm (4.5 in)
2005	163.5 mm (6.4 in)
2006	169.7 mm (6.7 in)
2007	410.2 mm (16.1 in)
2008	122.4 mm (4.8 in)
2009	187.5 mm (7.4 in)
2010	275.2 mm (10.8 in)
2011	229.7 mm (9.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Alamo, 1965 to 2011. The record is 85 days in 2011, marked on the chart; the median year is 37 days.

Longest dry spell (CDD) at Alamo by year
Year	Longest dry spell (CDD)
1965	18 days
1966	28 days
1967	23 days
1968	20 days
1969	23 days
1970	26 days
1971	37 days
1972	27 days
1973	37 days
1974	21 days
1975	27 days
1976	34 days
1977	67 days
1978	38 days
1979	33 days
1980	22 days
1981	21 days
1982	20 days
1983	39 days
1984	68 days
1985	21 days
1986	44 days
1987	22 days
1988	40 days
1989	68 days
1990	48 days
1991	45 days
1992	42 days
1993	55 days
1994	38 days
1995	53 days
1996	67 days
1997	29 days
1998	38 days
1999	38 days
2000	36 days
2001	51 days
2002	38 days
2003	34 days
2004	47 days
2005	79 days
2006	37 days
2007	46 days
2008	27 days
2009	27 days
2010	31 days
2011	85 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.

Rainfall Return Levels

46 years, 1966 to 2011

A day with at least 98.7 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 244.2 mm (9.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Alamo: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	98.7 mm (3.9 in)
5 years	139.8 mm (5.5 in)
10 years	166.2 mm (6.5 in)
25 years	198.4 mm (7.8 in)
50 years	221.7 mm (8.7 in)	Longer than the 46 years of record
100 years	244.2 mm (9.6 in)	Longer than the 46 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 46 years of values from 1966 to 2011.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 247.4 mm (9.7 in) in 1981; 192.8 mm (7.6 in) in 2007; 187.5 mm (7.4 in) in 1975.

Download the Data

Data for Alamo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alamo 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 2026-10-15 (15 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).