Montemorelos Weather Records (MXN00019048)

Record envelope, standing records and threshold days for Montemorelos (MXN00019048), Mexico, with 85 years of record.

Key Facts for Montemorelos

Montemorelos (MXN00019048) is a weather station in Mexico at 25.17 latitude and -99.82 longitude, 421 m (1,381 ft) above sea level.
The station reports from 1927 to 2011, 85 years of record.
1,464 records set at Montemorelos still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Montemorelos set a daily record precipitation of 17.3 mm (0.7 in) on 10 December 2011.

About the Station

Location: Mexico, 25.17 latitude, -99.82 longitude.
Elevation: 421 m (1,381 ft).
Period of record: 1927 to 2011, 85 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 Montemorelos. 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 Montemorelos, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	40.6 C (105.1 F)	-10.0 C (14.0 F)	n/a	n/a
Feb	42.8 C (109.0 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	42.8 C (109.0 F)	0.0 C (32.0 F)	n/a	n/a
Apr	44.4 C (111.9 F)	0.6 C (33.1 F)	n/a	n/a
May	45.0 C (113.0 F)	5.0 C (41.0 F)	n/a	n/a
Jun	46.1 C (115.0 F)	10.0 C (50.0 F)	n/a	n/a
Jul	45.0 C (113.0 F)	15.0 C (59.0 F)	n/a	n/a
Aug	45.0 C (113.0 F)	16.1 C (61.0 F)	n/a	n/a
Sep	44.4 C (111.9 F)	8.3 C (46.9 F)	n/a	n/a
Oct	39.4 C (102.9 F)	1.7 C (35.1 F)	n/a	n/a
Nov	39.4 C (102.9 F)	-1.7 C (28.9 F)	n/a	n/a
Dec	38.3 C (100.9 F)	-7.2 C (19.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Montemorelos still stand. 1930 holds the most, with 129.

Standing records at Montemorelos by the year they were set
Year set	Standing records
1927	36
1928	30
1929	25
1930	129
1942	6
1943	15
1944	17
1945	14
1946	8
1947	29
1948	33
1949	32
1950	26
1951	26
1952	18
1953	26
1954	18
1955	23
1956	11
1957	23
1958	14
1959	23
1960	18
1961	25
1962	17
1963	15
1964	17
1965	14
1966	19
1967	16
1968	15
1969	10
1970	21
1971	18
1972	20
1973	24
1974	23
1975	24
1976	31
1977	8
1978	9
1979	18
1980	11
1981	19
1982	22
1983	18
1984	22
1985	12
1986	9
1987	9
1988	5
1989	18
1990	11
1991	52
1992	16
1993	10
1994	12
1995	15
1996	31
1997	23
1998	45
1999	19
2000	50
2001	3
2002	4
2003	9
2004	3
2005	6
2006	6
2008	30
2009	5
2010	12
2011	13

All-Time Record Progression

3 new records

3 all-time records were set at Montemorelos between 15 June 1998 and 30 June 2010. Each dot is a new record.

When Montemorelos set new all-time records
Date	Kind	Detail
1998-06-15	Record high maximum temperature	Record high maximum temperature 46.1 C (115.0 F)
2005-07-20	Record daily precipitation	Record daily precipitation 221.0 mm (8.7 in)
2010-06-30	Record daily precipitation	Record daily precipitation 279.9 mm (11.0 in)

Wettest Day of Each Month

Jun: 279.9 mm (11.0 in)

The wettest day on record for each calendar month at Montemorelos. The most was 279.9 mm (11.0 in) on 30 June 2010.

Record daily precipitation for each month at Montemorelos
Month	Record daily precipitation (mm)	Date
Jan	67.8 mm (2.7 in)	21 January 1994
Feb	65.8 mm (2.6 in)	16 February 1957
Mar	99.8 mm (3.9 in)	22 March 1967
Apr	124.0 mm (4.9 in)	12 April 1957
May	109.0 mm (4.3 in)	15 May 1956
Jun	279.9 mm (11.0 in)	30 June 2010
Jul	221.0 mm (8.7 in)	20 July 2005
Aug	129.8 mm (5.1 in)	19 August 1967
Sep	200.7 mm (7.9 in)	15 September 2002
Oct	205.0 mm (8.1 in)	5 October 1942
Nov	104.9 mm (4.1 in)	9 November 1983
Dec	79.0 mm (3.1 in)	5 December 2003

Period of Record Coverage

1927 to 2011

73 years of record at Montemorelos, 1927 to 2011. 14 years have data for under 90 percent of days and are left out of rankings: 1930, 1942, 1986, 1987, 1988, 1989, 1991, 1995 and others.

Days with data per year at Montemorelos
Year	Days with data	Share of year	Complete
1927	362	99%	Yes
1928	364	99%	Yes
1929	360	99%	Yes
1930	240	66%	No
1942	108	30%	No
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	363	99%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	334	92%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	360	99%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	362	99%	Yes
1960	365	100%	Yes
1961	364	100%	Yes
1962	363	99%	Yes
1963	362	99%	Yes
1964	366	100%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	364	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	334	92%	Yes
1975	363	99%	Yes
1976	365	100%	Yes
1977	365	100%	Yes
1978	363	99%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	362	99%	Yes
1982	363	99%	Yes
1983	361	99%	Yes
1984	359	98%	Yes
1985	365	100%	Yes
1986	177	48%	No
1987	164	45%	No
1988	84	23%	No
1989	320	88%	No
1990	358	98%	Yes
1991	319	87%	No
1992	354	97%	Yes
1993	330	90%	Yes
1994	354	97%	Yes
1995	322	88%	No
1996	356	97%	Yes
1997	358	98%	Yes
1998	321	88%	No
1999	325	89%	No
2000	327	89%	No
2001	326	89%	No
2002	358	98%	Yes
2003	359	98%	Yes
2004	360	98%	Yes
2005	356	98%	Yes
2006	206	56%	No
2008	327	89%	No
2009	360	99%	Yes
2010	365	100%	Yes
2011	359	98%	Yes

Latest Records

Latest records at Montemorelos
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 December 2011	Montemorelos, MX	daily rain	17.3 mm (0.7 in)	10.4 mm (0.4 in)	57 years	20 of 100 (Routine)
28 November 2011	Montemorelos, MX	daily low min	0.0 C (32.0 F)	0.6 C (1.1 F)	82 years	33 of 100 (Routine)
21 November 2011	Montemorelos, MX	daily high min	20.0 C (68.0 F)	1.1 C (2.0 F)	6 years	12 of 100 (Routine)
11 November 2011	Montemorelos, MX	daily low min (Tie)	2.8 C (37.0 F)	tie	57 years	6 of 100 (Routine)
8 November 2011	Montemorelos, MX	daily high min	20.6 C (69.1 F)	0.6 C (1.1 F)	16 years	14 of 100 (Routine)
19 October 2011	Montemorelos, MX	daily low min (Tie)	8.9 C (48.0 F)	tie	56 years	6 of 100 (Routine)
7 October 2011	Montemorelos, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	62 years	6 of 100 (Routine)
27 September 2011	Montemorelos, MX	daily high max (Tie)	37.8 C (100.0 F)	tie	52 years	5 of 100 (Routine)
26 September 2011	Montemorelos, MX	daily high max	40.0 C (104.0 F)	1.1 C (2.0 F)	25 years	17 of 100 (Routine)
25 September 2011	Montemorelos, MX	daily high max	38.9 C (102.0 F)	1.7 C (3.1 F)	12 years	15 of 100 (Routine)
12 September 2011	Montemorelos, MX	daily low min (Tie)	16.7 C (62.1 F)	tie	50 years	5 of 100 (Routine)
10 September 2011	Montemorelos, MX	daily low min (Tie)	15.0 C (59.0 F)	tie	36 years	4 of 100 (Routine)
9 September 2011	Montemorelos, MX	daily low min	15.0 C (59.0 F)	0.6 C (1.1 F)	36 years	21 of 100 (Routine)
30 June 2011	Montemorelos, MX	daily low max (Tie)	23.9 C (75.0 F)	tie	0 years	2 of 100 (Routine)
26 April 2011	Montemorelos, MX	daily high max (Tie)	42.8 C (109.0 F)	tie	17 years	3 of 100 (Routine)
8 April 2011	Montemorelos, MX	daily high max (Tie)	40.0 C (104.0 F)	tie	12 years	2 of 100 (Routine)
8 March 2011	Montemorelos, MX	daily high max	36.7 C (98.1 F)	1.7 C (3.1 F)	60 years	28 of 100 (Routine)
27 February 2011	Montemorelos, MX	daily high max (Tie)	37.8 C (100.0 F)	tie	21 years	3 of 100 (Routine)
13 February 2011	Montemorelos, MX	daily low min	-4.4 C (24.1 F)	3.3 C (5.9 F)	51 years	30 of 100 (Routine)
12 February 2011	Montemorelos, MX	daily low min	-3.3 C (26.1 F)	1.1 C (2.0 F)	56 years	26 of 100 (Routine)

Climate Trend

55 complete years, 1927 to 2011

One stripe for each of 55 complete years at Montemorelos, 1927 to 2011. Blue stripes are years cooler than the station's own mean of 22.2 C (71.9 F); red stripes are warmer. The coolest year was 1976, at 20.2 C (68.4 F), and the warmest was 1927, at 24.7 C (76.5 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at Montemorelos as warming stripes, 1927 to 2011
Year	Annual mean temperature	Difference from the station mean
1927	24.7 C	+2.58 C
1928	22.4 C	+0.25 C
1929	23.1 C	+0.93 C
1943	22.0 C	-0.16 C
1944	21.5 C	-0.67 C
1945	22.6 C	+0.43 C
1946	22.9 C	+0.76 C
1947	22.2 C	+0.07 C
1948	22.6 C	+0.44 C
1949	22.8 C	+0.62 C
1951	22.4 C	+0.28 C
1952	22.2 C	+0.04 C
1953	23.0 C	+0.82 C
1954	23.2 C	+1.00 C
1955	22.4 C	+0.19 C
1956	22.1 C	-0.04 C
1957	22.5 C	+0.36 C
1958	21.4 C	-0.78 C
1959	21.1 C	-1.09 C
1960	21.6 C	-0.57 C
1961	21.5 C	-0.66 C
1962	22.5 C	+0.38 C
1963	22.0 C	-0.15 C
1964	22.1 C	-0.11 C
1965	22.2 C	-0.01 C
1966	20.4 C	-1.74 C
1967	21.6 C	-0.53 C
1968	20.5 C	-1.69 C
1969	21.5 C	-0.71 C
1971	22.4 C	+0.24 C
1972	21.5 C	-0.66 C
1973	21.0 C	-1.20 C
1975	21.5 C	-0.71 C
1976	20.2 C	-1.92 C
1977	21.4 C	-0.77 C
1978	21.4 C	-0.77 C
1979	21.3 C	-0.84 C
1980	22.4 C	+0.20 C
1981	21.7 C	-0.45 C
1982	22.4 C	+0.22 C
1983	21.6 C	-0.57 C
1984	22.2 C	+0.01 C
1985	22.7 C	+0.56 C
1990	23.5 C	+1.32 C
1992	22.9 C	+0.73 C
1994	23.7 C	+1.56 C
1996	23.7 C	+1.55 C
1997	23.4 C	+1.22 C
2002	22.3 C	+0.12 C
2003	22.1 C	-0.09 C
2004	22.1 C	-0.06 C
2005	22.4 C	+0.19 C
2009	22.6 C	+0.43 C
2010	20.9 C	-1.29 C
2011	23.1 C	+0.91 C

The fitted trend in annual mean temperature here over 1927 to 2011 is -0.03 C (-0.14 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.05 F (-0.25 to 0.15) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Montemorelos
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.03 C (-0.14 to 0.08) per decade	-0.05 F (-0.25 to 0.15) per decade	1927 to 2011	55	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.2 to 0.1) per decade	-0.1 F (-0.4 to 0.2) per decade	1927 to 2011	55	Not clearly different from zero
Mean daily minimum	0.02 C (-0.07 to 0.11) per decade	0.03 F (-0.13 to 0.20) per decade	1927 to 2011	55	Not clearly different from zero

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

1927 to 2011

Yearly extremes at Montemorelos: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.1 C (115.0 F)	1998	40.6 C (105.1 F)	73
Coldest night (TNn)	-10.0 C (14.0 F)	1962	-1.1 C (30.0 F)	73
Wettest day (Rx1day)	279.9 mm (11.0 in)	2010	88.9 mm (3.5 in)	73
Wettest five days (Rx5day)	508.2 mm (20.0 in)	2010	144.5 mm (5.7 in)	73
Longest dry spell (CDD)	93 days	1928	42 days	73

Hottest day (TXx)

The hottest day of the year at Montemorelos, 1927 to 2011. The record is 46.1 C (115.0 F) in 1998, marked on the chart; the median year is 40.6 C (105.1 F).

Hottest day (TXx) at Montemorelos by year
Year	Hottest day (TXx)
1927	42.8 C (109.0 F)
1928	39.4 C (102.9 F)
1929	39.4 C (102.9 F)
1930	38.3 C (100.9 F)
1942	36.1 C (97.0 F)
1943	41.1 C (106.0 F)
1944	39.4 C (102.9 F)
1945	40.6 C (105.1 F)
1946	40.6 C (105.1 F)
1947	41.1 C (106.0 F)
1948	42.2 C (108.0 F)
1949	41.7 C (107.1 F)
1950	43.3 C (109.9 F)
1951	42.2 C (108.0 F)
1952	42.2 C (108.0 F)
1953	42.2 C (108.0 F)
1954	45.0 C (113.0 F)
1955	43.3 C (109.9 F)
1956	40.0 C (104.0 F)
1957	43.3 C (109.9 F)
1958	42.2 C (108.0 F)
1959	38.3 C (100.9 F)
1960	41.1 C (106.0 F)
1961	40.0 C (104.0 F)
1962	40.6 C (105.1 F)
1963	42.8 C (109.0 F)
1964	40.6 C (105.1 F)
1965	40.0 C (104.0 F)
1966	39.4 C (102.9 F)
1967	40.0 C (104.0 F)
1968	38.9 C (102.0 F)
1969	40.6 C (105.1 F)
1970	39.4 C (102.9 F)
1971	41.7 C (107.1 F)
1972	38.9 C (102.0 F)
1973	41.7 C (107.1 F)
1974	42.2 C (108.0 F)
1975	39.4 C (102.9 F)
1976	37.8 C (100.0 F)
1977	39.4 C (102.9 F)
1978	40.0 C (104.0 F)
1979	39.4 C (102.9 F)
1980	41.1 C (106.0 F)
1981	39.4 C (102.9 F)
1982	40.0 C (104.0 F)
1983	41.7 C (107.1 F)
1984	45.0 C (113.0 F)
1985	40.6 C (105.1 F)
1986	40.6 C (105.1 F)
1987	45.0 C (113.0 F)
1988	37.8 C (100.0 F)
1989	42.8 C (109.0 F)
1990	45.0 C (113.0 F)
1991	42.8 C (109.0 F)
1992	42.8 C (109.0 F)
1993	42.8 C (109.0 F)
1994	41.7 C (107.1 F)
1995	41.7 C (107.1 F)
1996	41.7 C (107.1 F)
1997	43.3 C (109.9 F)
1998	46.1 C (115.0 F)
1999	43.9 C (111.0 F)
2000	44.4 C (111.9 F)
2001	40.0 C (104.0 F)
2002	41.7 C (107.1 F)
2003	40.0 C (104.0 F)
2004	38.9 C (102.0 F)
2005	40.6 C (105.1 F)
2006	38.9 C (102.0 F)
2008	40.0 C (104.0 F)
2009	40.6 C (105.1 F)
2010	36.7 C (98.1 F)
2011	42.8 C (109.0 F)

Coldest night (TNn)

The coldest night of the year at Montemorelos, 1927 to 2011. The record is -10.0 C (14.0 F) in 1962, marked on the chart; the median year is -1.1 C (30.0 F).

Coldest night (TNn) at Montemorelos by year
Year	Coldest night (TNn)
1927	0.0 C (32.0 F)
1928	0.0 C (32.0 F)
1929	0.6 C (33.1 F)
1930	0.0 C (32.0 F)
1942	0.6 C (33.1 F)
1943	0.0 C (32.0 F)
1944	-3.3 C (26.1 F)
1945	0.0 C (32.0 F)
1946	0.0 C (32.0 F)
1947	-2.2 C (28.0 F)
1948	-3.3 C (26.1 F)
1949	-5.6 C (21.9 F)
1950	-3.3 C (26.1 F)
1951	-6.1 C (21.0 F)
1952	0.0 C (32.0 F)
1953	-3.3 C (26.1 F)
1954	0.0 C (32.0 F)
1955	-2.2 C (28.0 F)
1956	-1.7 C (28.9 F)
1957	-2.2 C (28.0 F)
1958	0.0 C (32.0 F)
1959	0.0 C (32.0 F)
1960	-3.3 C (26.1 F)
1961	0.0 C (32.0 F)
1962	-10.0 C (14.0 F)
1963	-4.4 C (24.1 F)
1964	-3.3 C (26.1 F)
1965	0.0 C (32.0 F)
1966	-3.3 C (26.1 F)
1967	-2.2 C (28.0 F)
1968	0.0 C (32.0 F)
1969	0.0 C (32.0 F)
1970	0.0 C (32.0 F)
1971	-2.8 C (27.0 F)
1972	-1.1 C (30.0 F)
1973	-4.4 C (24.1 F)
1974	-1.1 C (30.0 F)
1975	-5.0 C (23.0 F)
1976	-3.3 C (26.1 F)
1977	-1.1 C (30.0 F)
1978	-1.7 C (28.9 F)
1979	-3.3 C (26.1 F)
1980	-1.1 C (30.0 F)
1981	-1.1 C (30.0 F)
1982	-1.7 C (28.9 F)
1983	-7.2 C (19.0 F)
1984	-3.3 C (26.1 F)
1985	-3.3 C (26.1 F)
1986	0.6 C (33.1 F)
1987	0.0 C (32.0 F)
1988	0.0 C (32.0 F)
1989	-1.1 C (30.0 F)
1990	-1.1 C (30.0 F)
1991	2.2 C (36.0 F)
1992	2.2 C (36.0 F)
1993	0.6 C (33.1 F)
1994	0.6 C (33.1 F)
1995	1.7 C (35.1 F)
1996	-2.2 C (28.0 F)
1997	0.0 C (32.0 F)
1998	1.1 C (34.0 F)
1999	0.0 C (32.0 F)
2000	1.7 C (35.1 F)
2001	0.0 C (32.0 F)
2002	1.7 C (35.1 F)
2003	1.7 C (35.1 F)
2004	-3.3 C (26.1 F)
2005	1.7 C (35.1 F)
2006	-2.2 C (28.0 F)
2008	0.0 C (32.0 F)
2009	0.6 C (33.1 F)
2010	-4.4 C (24.1 F)
2011	-5.0 C (23.0 F)

Wettest day (Rx1day)

The wettest day of the year at Montemorelos, 1927 to 2011. The record is 279.9 mm (11.0 in) in 2010, marked on the chart; the median year is 88.9 mm (3.5 in).

Wettest day (Rx1day) at Montemorelos by year
Year	Wettest day (Rx1day)
1927	59.9 mm (2.4 in)
1928	7.9 mm (0.31 in)
1929	21.8 mm (0.9 in)
1930	19.8 mm (0.8 in)
1942	205.0 mm (8.1 in)
1943	96.3 mm (3.8 in)
1944	80.8 mm (3.2 in)
1945	104.9 mm (4.1 in)
1946	73.9 mm (2.9 in)
1947	81.0 mm (3.2 in)
1948	75.7 mm (3.0 in)
1949	55.4 mm (2.2 in)
1950	52.3 mm (2.1 in)
1951	128.8 mm (5.1 in)
1952	66.8 mm (2.6 in)
1953	96.8 mm (3.8 in)
1954	76.5 mm (3.0 in)
1955	110.0 mm (4.3 in)
1956	109.0 mm (4.3 in)
1957	124.0 mm (4.9 in)
1958	95.8 mm (3.8 in)
1959	70.9 mm (2.8 in)
1960	113.8 mm (4.5 in)
1961	82.3 mm (3.2 in)
1962	88.9 mm (3.5 in)
1963	108.0 mm (4.3 in)
1964	79.8 mm (3.1 in)
1965	104.9 mm (4.1 in)
1966	65.8 mm (2.6 in)
1967	174.8 mm (6.9 in)
1968	96.8 mm (3.8 in)
1969	101.9 mm (4.0 in)
1970	59.9 mm (2.4 in)
1971	87.9 mm (3.5 in)
1972	96.8 mm (3.8 in)
1973	121.9 mm (4.8 in)
1974	126.0 mm (5.0 in)
1975	94.5 mm (3.7 in)
1976	87.9 mm (3.5 in)
1977	145.8 mm (5.7 in)
1978	152.9 mm (6.0 in)
1979	66.8 mm (2.6 in)
1980	53.8 mm (2.1 in)
1981	71.9 mm (2.8 in)
1982	53.8 mm (2.1 in)
1983	131.8 mm (5.2 in)
1984	99.8 mm (3.9 in)
1985	80.8 mm (3.2 in)
1986	56.9 mm (2.2 in)
1987	72.9 mm (2.9 in)
1988	15.0 mm (0.6 in)
1989	108.0 mm (4.3 in)
1990	51.8 mm (2.0 in)
1991	34.8 mm (1.4 in)
1992	63.5 mm (2.5 in)
1993	73.4 mm (2.9 in)
1994	67.8 mm (2.7 in)
1995	112.8 mm (4.4 in)
1996	88.9 mm (3.5 in)
1997	99.8 mm (3.9 in)
1998	86.9 mm (3.4 in)
1999	121.4 mm (4.8 in)
2000	119.9 mm (4.7 in)
2001	104.9 mm (4.1 in)
2002	200.7 mm (7.9 in)
2003	94.0 mm (3.7 in)
2004	87.1 mm (3.4 in)
2005	221.0 mm (8.7 in)
2006	30.0 mm (1.2 in)
2008	190.0 mm (7.5 in)
2009	140.5 mm (5.5 in)
2010	279.9 mm (11.0 in)
2011	84.3 mm (3.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Montemorelos, 1927 to 2011. The record is 508.2 mm (20.0 in) in 2010, marked on the chart; the median year is 144.5 mm (5.7 in).

Wettest five days (Rx5day) at Montemorelos by year
Year	Wettest five days (Rx5day)
1927	143.7 mm (5.7 in)
1928	7.9 mm (0.31 in)
1929	31.7 mm (1.2 in)
1930	54.6 mm (2.1 in)
1942	243.4 mm (9.6 in)
1943	122.0 mm (4.8 in)
1944	150.2 mm (5.9 in)
1945	207.3 mm (8.2 in)
1946	86.0 mm (3.4 in)
1947	237.0 mm (9.3 in)
1948	127.2 mm (5.0 in)
1949	96.1 mm (3.8 in)
1950	82.1 mm (3.2 in)
1951	191.8 mm (7.6 in)
1952	84.3 mm (3.3 in)
1953	198.9 mm (7.8 in)
1954	98.6 mm (3.9 in)
1955	117.6 mm (4.6 in)
1956	111.8 mm (4.4 in)
1957	132.6 mm (5.2 in)
1958	232.3 mm (9.1 in)
1959	109.5 mm (4.3 in)
1960	140.0 mm (5.5 in)
1961	133.3 mm (5.2 in)
1962	120.7 mm (4.8 in)
1963	153.2 mm (6.0 in)
1964	169.5 mm (6.7 in)
1965	108.5 mm (4.3 in)
1966	141.3 mm (5.6 in)
1967	388.1 mm (15.3 in)
1968	144.5 mm (5.7 in)
1969	197.5 mm (7.8 in)
1970	113.0 mm (4.4 in)
1971	120.7 mm (4.8 in)
1972	179.3 mm (7.1 in)
1973	373.3 mm (14.7 in)
1974	238.8 mm (9.4 in)
1975	152.3 mm (6.0 in)
1976	220.6 mm (8.7 in)
1977	296.0 mm (11.7 in)
1978	404.9 mm (15.9 in)
1979	119.1 mm (4.7 in)
1980	87.6 mm (3.4 in)
1981	141.3 mm (5.6 in)
1982	58.4 mm (2.3 in)
1983	225.8 mm (8.9 in)
1984	151.2 mm (6.0 in)
1985	159.8 mm (6.3 in)
1986	142.5 mm (5.6 in)
1987	197.1 mm (7.8 in)
1988	21.1 mm (0.8 in)
1989	109.3 mm (4.3 in)
1990	54.5 mm (2.1 in)
1991	61.5 mm (2.4 in)
1992	130.1 mm (5.1 in)
1993	119.1 mm (4.7 in)
1994	80.5 mm (3.2 in)
1995	250.4 mm (9.9 in)
1996	234.5 mm (9.2 in)
1997	228.9 mm (9.0 in)
1998	105.0 mm (4.1 in)
1999	165.4 mm (6.5 in)
2000	153.7 mm (6.1 in)
2001	227.5 mm (9.0 in)
2002	285.3 mm (11.2 in)
2003	271.0 mm (10.7 in)
2004	154.5 mm (6.1 in)
2005	263.7 mm (10.4 in)
2006	37.9 mm (1.5 in)
2008	271.8 mm (10.7 in)
2009	145.1 mm (5.7 in)
2010	508.2 mm (20.0 in)
2011	158.2 mm (6.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Montemorelos, 1927 to 2011. The record is 93 days in 1928, marked on the chart; the median year is 42 days.

Longest dry spell (CDD) at Montemorelos by year
Year	Longest dry spell (CDD)
1927	72 days
1928	93 days
1929	49 days
1930	58 days
1942	35 days
1943	36 days
1944	31 days
1945	58 days
1946	49 days
1947	40 days
1948	48 days
1949	25 days
1950	37 days
1951	41 days
1952	47 days
1953	43 days
1954	53 days
1955	51 days
1956	33 days
1957	54 days
1958	36 days
1959	44 days
1960	22 days
1961	30 days
1962	48 days
1963	30 days
1964	28 days
1965	31 days
1966	47 days
1967	38 days
1968	34 days
1969	43 days
1970	65 days
1971	77 days
1972	36 days
1973	24 days
1974	45 days
1975	42 days
1976	32 days
1977	25 days
1978	46 days
1979	47 days
1980	46 days
1981	28 days
1982	49 days
1983	61 days
1984	77 days
1985	42 days
1986	31 days
1987	49 days
1988	33 days
1989	25 days
1990	36 days
1991	40 days
1992	37 days
1993	30 days
1994	26 days
1995	28 days
1996	63 days
1997	30 days
1998	42 days
1999	59 days
2000	36 days
2001	46 days
2002	50 days
2003	27 days
2004	32 days
2005	48 days
2006	48 days
2008	55 days
2009	41 days
2010	64 days
2011	65 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.

Frost Dates and Growing Season

20 years with a frost

Across 20 years with a frost, the median last spring frost at Montemorelos falls on 31 January and the median first autumn frost on 16 December, which leaves a median of 319 days between them.

Frost dates and growing season at Montemorelos
Measure	Median, all years	Earliest period	Recent period (1944 to 2011)	Recent against earliest	Fitted trend
Last spring frost	31 January	n/a	31 January	n/a	n/a
First autumn frost	16 December	n/a	16 December	n/a	n/a
Growing days	319 days	n/a	319 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

64 years, 1927 to 2011

A day with at least 90.5 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 259.2 mm (10.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Montemorelos: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	90.5 mm (3.6 in)
5 years	128.9 mm (5.1 in)
10 years	156.9 mm (6.2 in)
25 years	195.3 mm (7.7 in)
50 years	226.3 mm (8.9 in)
100 years	259.2 mm (10.2 in)	Longer than the 64 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, 64 years of values from 1927 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: 279.9 mm (11.0 in) in 2010; 221.0 mm (8.7 in) in 2005; 205.0 mm (8.1 in) in 1942.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Montemorelos, at 1990. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1990 ran 0.5 C (0.8 F) higher than in the years before (possible change).

Suspected changes in the annual mean temperature at Montemorelos, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1990	+0.5	+0.8	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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

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