Jalostotitlan Weather Records (MXN00014074)

Record envelope, standing records and threshold days for Jalostotitlan (MXN00014074), Mexico, with 69 years of record.

Key Facts for Jalostotitlan

Jalostotitlan (MXN00014074) is a weather station in Mexico at 21.17 latitude and -102.45 longitude, 1,750 m (5,741 ft) above sea level.
The station reports from 1941 to 2009, 69 years of record.
1,464 records set at Jalostotitlan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Jalostotitlan set a monthly record daily precipitation of 85.6 mm (3.4 in) on 13 September 2009.

About the Station

Location: Mexico, 21.17 latitude, -102.45 longitude.
Elevation: 1,750 m (5,741 ft).
Period of record: 1941 to 2009, 69 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 Jalostotitlan. 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 Jalostotitlan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.0 C (95.0 F)	-8.9 C (16.0 F)	n/a	n/a
Feb	40.0 C (104.0 F)	-10.0 C (14.0 F)	n/a	n/a
Mar	35.6 C (96.1 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	40.0 C (104.0 F)	-3.3 C (26.1 F)	n/a	n/a
May	40.6 C (105.1 F)	1.7 C (35.1 F)	n/a	n/a
Jun	41.7 C (107.1 F)	3.9 C (39.0 F)	n/a	n/a
Jul	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	3.9 C (39.0 F)	n/a	n/a
Sep	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Oct	36.7 C (98.1 F)	-1.1 C (30.0 F)	n/a	n/a
Nov	35.6 C (96.1 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	33.9 C (93.0 F)	-6.7 C (19.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Jalostotitlan still stand. 1946 holds the most, with 128.

Standing records at Jalostotitlan by the year they were set
Year set	Standing records
1941	16
1942	65
1943	32
1944	49
1945	71
1946	128
1947	97
1948	38
1949	17
1950	31
1951	23
1953	13
1954	10
1955	21
1956	11
1957	11
1958	10
1959	9
1960	25
1961	91
1962	8
1963	32
1964	14
1965	13
1966	18
1967	24
1968	20
1969	8
1970	21
1971	16
1972	23
1973	8
1974	7
1975	5
1976	32
1977	9
1978	7
1979	12
1980	6
1981	7
1982	13
1983	14
1984	12
1985	19
1986	4
1987	17
1988	14
1989	18
1990	9
1991	12
1992	18
1993	6
1994	8
1995	22
1996	10
1997	27
1998	27
1999	23
2000	26
2001	24
2004	19
2005	30
2006	6
2007	11
2008	12
2009	5

All-Time Record Progression

2 new records

2 all-time records were set at Jalostotitlan between 20 May 1995 and 1 June 1998. Each dot is a new record.

When Jalostotitlan set new all-time records
Date	Kind	Detail
1995-05-20	Record high maximum temperature	Record high maximum temperature 40.6 C (105.1 F)
1998-06-01	Record high maximum temperature	Record high maximum temperature 41.7 C (107.1 F)

Wettest Day of Each Month

Aug: 100.1 mm (3.9 in)

The wettest day on record for each calendar month at Jalostotitlan. The most was 100.1 mm (3.9 in) on 24 August 1972.

Record daily precipitation for each month at Jalostotitlan
Month	Record daily precipitation (mm)	Date
Jan	47.0 mm (1.9 in)	12 January 1967
Feb	43.4 mm (1.7 in)	11 February 1966
Mar	18.3 mm (0.7 in)	4 March 1968
Apr	32.5 mm (1.3 in)	29 April 1965
May	51.1 mm (2.0 in)	31 May 1978
Jun	82.0 mm (3.2 in)	27 June 2007
Jul	85.3 mm (3.4 in)	17 July 1970
Aug	100.1 mm (3.9 in)	24 August 1972
Sep	85.6 mm (3.4 in)	13 September 2009
Oct	51.8 mm (2.0 in)	12 October 1954
Nov	35.6 mm (1.4 in)	2 November 1958
Dec	39.9 mm (1.6 in)	14 December 1958

Period of Record Coverage

1941 to 2009

68 years of record at Jalostotitlan, 1941 to 2009. 16 years have data for under 90 percent of days and are left out of rankings: 1941, 1947, 1948, 1951, 1953, 1955, 1959, 1964 and others.

Days with data per year at Jalostotitlan
Year	Days with data	Share of year	Complete
1941	60	16%	No
1942	362	99%	Yes
1943	362	99%	Yes
1944	331	90%	Yes
1945	357	98%	Yes
1946	352	96%	Yes
1947	235	64%	No
1948	294	80%	No
1949	350	96%	Yes
1950	357	98%	Yes
1951	303	83%	No
1953	212	58%	No
1954	360	99%	Yes
1955	326	89%	No
1956	364	99%	Yes
1957	358	98%	Yes
1958	363	99%	Yes
1959	302	83%	No
1960	363	99%	Yes
1961	355	97%	Yes
1962	361	99%	Yes
1963	357	98%	Yes
1964	327	89%	No
1965	354	97%	Yes
1966	332	91%	Yes
1967	357	98%	Yes
1968	350	96%	Yes
1969	352	96%	Yes
1970	356	98%	Yes
1971	357	98%	Yes
1972	361	99%	Yes
1973	359	98%	Yes
1974	356	98%	Yes
1975	364	100%	Yes
1976	364	99%	Yes
1977	362	99%	Yes
1978	361	99%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	362	99%	Yes
1982	364	100%	Yes
1983	354	97%	Yes
1984	353	96%	Yes
1985	360	99%	Yes
1986	363	99%	Yes
1987	357	98%	Yes
1988	363	99%	Yes
1989	324	89%	No
1990	329	90%	Yes
1991	363	99%	Yes
1992	358	98%	Yes
1993	329	90%	Yes
1994	333	91%	Yes
1995	363	99%	Yes
1996	323	88%	No
1997	359	98%	Yes
1998	362	99%	Yes
1999	364	100%	Yes
2000	304	83%	No
2001	302	83%	No
2002	31	8%	No
2003	31	8%	No
2004	128	35%	No
2005	364	100%	Yes
2006	365	100%	Yes
2007	364	100%	Yes
2008	366	100%	Yes
2009	273	75%	No

Latest Records

Latest records at Jalostotitlan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
13 September 2009	Jalostotitlan, MX	monthly rain	85.6 mm (3.4 in)	7.1 mm (0.28 in)	46 years	36 of 100 (Notable)
9 August 2009	Jalostotitlan, MX	daily rain	41.9 mm (1.6 in)	1.0 mm (0.04 in)	52 years	21 of 100 (Routine)
6 July 2009	Jalostotitlan, MX	daily low max	21.7 C (71.1 F)	1.1 C (2.0 F)	44 years	22 of 100 (Routine)
29 June 2009	Jalostotitlan, MX	daily rain	35.3 mm (1.4 in)	6.3 mm (0.25 in)	67 years	31 of 100 (Routine)
11 June 2009	Jalostotitlan, MX	daily high min	18.9 C (66.0 F)	2.2 C (4.0 F)	67 years	35 of 100 (Notable)
24 May 2009	Jalostotitlan, MX	daily low max (Tie)	28.9 C (84.0 F)	tie	44 years	4 of 100 (Routine)
23 May 2009	Jalostotitlan, MX	daily low max	26.1 C (79.0 F)	2.2 C (4.0 F)	52 years	28 of 100 (Routine)
22 May 2009	Jalostotitlan, MX	daily low max	26.7 C (80.1 F)	1.1 C (2.0 F)	44 years	22 of 100 (Routine)
21 May 2009	Jalostotitlan, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	27 years	3 of 100 (Routine)
20 May 2009	Jalostotitlan, MX	daily low max	24.4 C (75.9 F)	2.3 C (4.1 F)	28 years	22 of 100 (Routine)
12 December 2008	Jalostotitlan, MX	daily low min (Tie)	-4.4 C (24.1 F)	tie	41 years	4 of 100 (Routine)
1 December 2008	Jalostotitlan, MX	daily low min	-3.3 C (26.1 F)	1.1 C (2.0 F)	42 years	21 of 100 (Routine)
20 November 2008	Jalostotitlan, MX	daily low min	-2.2 C (28.0 F)	1.1 C (2.0 F)	59 years	26 of 100 (Routine)
19 November 2008	Jalostotitlan, MX	daily low min	-2.8 C (27.0 F)	1.7 C (3.1 F)	24 years	17 of 100 (Routine)
19 November 2008	Jalostotitlan, MX	daily low max (Tie)	21.7 C (71.1 F)	tie	59 years	5 of 100 (Routine)
4 October 2008	Jalostotitlan, MX	daily low min	2.2 C (36.0 F)	0.6 C (1.1 F)	21 years	13 of 100 (Routine)
3 October 2008	Jalostotitlan, MX	daily low min	2.2 C (36.0 F)	0.6 C (1.1 F)	47 years	21 of 100 (Routine)
2 October 2008	Jalostotitlan, MX	daily low min	2.2 C (36.0 F)	0.6 C (1.1 F)	16 years	11 of 100 (Routine)
10 September 2008	Jalostotitlan, MX	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	60 years	28 of 100 (Routine)
10 September 2008	Jalostotitlan, MX	daily rain	32.5 mm (1.3 in)	0.7 mm (0.03 in)	3 years	6 of 100 (Routine)

Climate Trend

41 complete years, 1942 to 2008

One stripe for each of 41 complete years at Jalostotitlan, 1942 to 2008. Blue stripes are years cooler than the station's own mean of 18.1 C (64.5 F); red stripes are warmer. The coolest year was 1985, at 16.8 C (62.2 F), and the warmest was 1946, at 21.8 C (71.2 F). The strongest colour marks a difference of 3.7 C (6.7 F).

Annual mean temperature at Jalostotitlan as warming stripes, 1942 to 2008
Year	Annual mean temperature	Difference from the station mean
1942	20.6 C	+2.52 C
1943	19.9 C	+1.81 C
1945	20.4 C	+2.31 C
1946	21.8 C	+3.69 C
1949	18.7 C	+0.64 C
1950	18.1 C	+0.04 C
1954	19.1 C	+1.05 C
1956	17.7 C	-0.38 C
1957	19.0 C	+0.89 C
1958	18.6 C	+0.57 C
1960	18.1 C	+0.06 C
1961	18.4 C	+0.32 C
1962	17.9 C	-0.12 C
1963	17.9 C	-0.20 C
1965	18.0 C	-0.04 C
1967	17.7 C	-0.34 C
1968	17.8 C	-0.27 C
1969	18.2 C	+0.15 C
1970	17.3 C	-0.74 C
1971	17.6 C	-0.46 C
1972	17.5 C	-0.55 C
1973	17.4 C	-0.66 C
1974	17.4 C	-0.66 C
1975	17.5 C	-0.58 C
1976	16.8 C	-1.26 C
1977	17.2 C	-0.88 C
1978	17.7 C	-0.34 C
1979	17.8 C	-0.29 C
1980	17.9 C	-0.15 C
1981	17.9 C	-0.20 C
1982	17.9 C	-0.16 C
1983	17.0 C	-1.05 C
1984	16.8 C	-1.29 C
1985	16.8 C	-1.30 C
1986	17.0 C	-1.05 C
1987	17.6 C	-0.45 C
1988	17.8 C	-0.31 C
2005	18.8 C	+0.69 C
2006	18.3 C	+0.21 C
2007	17.5 C	-0.52 C
2008	17.2 C	-0.82 C

The annual mean temperature here has fallen by 0.4 C (0.2 to 0.5) per decade over 1942 to 2008. In Fahrenheit: 0.7 F (0.4 to 0.9) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Jalostotitlan
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.4 C (-0.5 to -0.2) per decade	-0.7 F (-0.9 to -0.4) per decade	1942 to 2008	41	Fall
Mean daily maximum	-0.5 C (-0.8 to -0.3) per decade	-0.9 F (-1.4 to -0.5) per decade	1942 to 2008	41	Fall
Mean daily minimum	-0.2 C (-0.4 to -0.1) per decade	-0.4 F (-0.7 to -0.1) per decade	1942 to 2008	41	Fall

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

1941 to 2009

Yearly extremes at Jalostotitlan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.7 C (107.1 F)	1998	36.7 C (98.1 F)	68
Coldest night (TNn)	-10.0 C (14.0 F)	1960	-3.3 C (26.1 F)	68
Wettest day (Rx1day)	100.1 mm (3.9 in)	1972	50.6 mm (2.0 in)	68
Wettest five days (Rx5day)	212.6 mm (8.4 in)	2008	101.1 mm (4.0 in)	68
Longest dry spell (CDD)	170 days	1969	82 days	68

Hottest day (TXx)

The hottest day of the year at Jalostotitlan, 1941 to 2009. The record is 41.7 C (107.1 F) in 1998, marked on the chart; the median year is 36.7 C (98.1 F).

Hottest day (TXx) at Jalostotitlan by year
Year	Hottest day (TXx)
1941	31.7 C (89.1 F)
1942	38.9 C (102.0 F)
1943	37.8 C (100.0 F)
1944	38.9 C (102.0 F)
1945	35.6 C (96.1 F)
1946	37.8 C (100.0 F)
1947	40.0 C (104.0 F)
1948	40.0 C (104.0 F)
1949	38.3 C (100.9 F)
1950	38.3 C (100.9 F)
1951	37.2 C (99.0 F)
1953	31.7 C (89.1 F)
1954	37.2 C (99.0 F)
1955	36.7 C (98.1 F)
1956	36.1 C (97.0 F)
1957	36.7 C (98.1 F)
1958	35.6 C (96.1 F)
1959	35.6 C (96.1 F)
1960	35.0 C (95.0 F)
1961	40.0 C (104.0 F)
1962	35.0 C (95.0 F)
1963	35.6 C (96.1 F)
1964	35.6 C (96.1 F)
1965	37.8 C (100.0 F)
1966	35.6 C (96.1 F)
1967	37.8 C (100.0 F)
1968	37.8 C (100.0 F)
1969	37.8 C (100.0 F)
1970	35.0 C (95.0 F)
1971	33.9 C (93.0 F)
1972	35.0 C (95.0 F)
1973	35.0 C (95.0 F)
1974	35.6 C (96.1 F)
1975	35.6 C (96.1 F)
1976	36.7 C (98.1 F)
1977	33.9 C (93.0 F)
1978	35.0 C (95.0 F)
1979	34.4 C (93.9 F)
1980	36.7 C (98.1 F)
1981	35.0 C (95.0 F)
1982	37.8 C (100.0 F)
1983	38.9 C (102.0 F)
1984	35.0 C (95.0 F)
1985	35.6 C (96.1 F)
1986	36.1 C (97.0 F)
1987	38.9 C (102.0 F)
1988	37.8 C (100.0 F)
1989	40.0 C (104.0 F)
1990	40.0 C (104.0 F)
1991	38.9 C (102.0 F)
1992	36.7 C (98.1 F)
1993	38.9 C (102.0 F)
1994	38.9 C (102.0 F)
1995	40.6 C (105.1 F)
1996	40.0 C (104.0 F)
1997	40.0 C (104.0 F)
1998	41.7 C (107.1 F)
1999	40.0 C (104.0 F)
2000	40.6 C (105.1 F)
2001	40.0 C (104.0 F)
2002	30.6 C (87.1 F)
2003	31.1 C (88.0 F)
2004	28.9 C (84.0 F)
2005	37.2 C (99.0 F)
2006	35.6 C (96.1 F)
2007	35.6 C (96.1 F)
2008	37.8 C (100.0 F)
2009	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Jalostotitlan, 1941 to 2009. The record is -10.0 C (14.0 F) in 1960, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Jalostotitlan by year
Year	Coldest night (TNn)
1941	1.7 C (35.1 F)
1942	0.6 C (33.1 F)
1943	1.7 C (35.1 F)
1944	0.0 C (32.0 F)
1945	5.0 C (41.0 F)
1946	3.9 C (39.0 F)
1947	5.6 C (42.1 F)
1948	2.8 C (37.0 F)
1949	-5.0 C (23.0 F)
1950	-6.7 C (19.9 F)
1951	-6.7 C (19.9 F)
1953	-5.0 C (23.0 F)
1954	-5.0 C (23.0 F)
1955	-4.4 C (24.1 F)
1956	-8.3 C (17.1 F)
1957	-3.9 C (25.0 F)
1958	-3.3 C (26.1 F)
1959	-5.6 C (21.9 F)
1960	-10.0 C (14.0 F)
1961	-4.4 C (24.1 F)
1962	-5.0 C (23.0 F)
1963	-4.4 C (24.1 F)
1964	-4.4 C (24.1 F)
1965	-3.3 C (26.1 F)
1966	-7.2 C (19.0 F)
1967	-8.3 C (17.1 F)
1968	-3.3 C (26.1 F)
1969	-4.4 C (24.1 F)
1970	-5.0 C (23.0 F)
1971	-5.0 C (23.0 F)
1972	-6.1 C (21.0 F)
1973	-5.0 C (23.0 F)
1974	-3.3 C (26.1 F)
1975	-6.1 C (21.0 F)
1976	-6.1 C (21.0 F)
1977	-1.1 C (30.0 F)
1978	-1.1 C (30.0 F)
1979	0.0 C (32.0 F)
1980	-1.7 C (28.9 F)
1981	-2.2 C (28.0 F)
1982	-4.4 C (24.1 F)
1983	-6.1 C (21.0 F)
1984	-2.2 C (28.0 F)
1985	-7.2 C (19.0 F)
1986	-5.0 C (23.0 F)
1987	0.0 C (32.0 F)
1988	-0.6 C (30.9 F)
1989	-1.1 C (30.0 F)
1990	0.0 C (32.0 F)
1991	0.0 C (32.0 F)
1992	0.0 C (32.0 F)
1993	0.0 C (32.0 F)
1994	0.0 C (32.0 F)
1995	0.0 C (32.0 F)
1996	0.0 C (32.0 F)
1997	0.0 C (32.0 F)
1998	-4.4 C (24.1 F)
1999	0.0 C (32.0 F)
2000	0.0 C (32.0 F)
2001	0.0 C (32.0 F)
2002	0.0 C (32.0 F)
2003	3.9 C (39.0 F)
2004	-4.4 C (24.1 F)
2005	-3.3 C (26.1 F)
2006	-8.9 C (16.0 F)
2007	-3.9 C (25.0 F)
2008	-5.0 C (23.0 F)
2009	-1.7 C (28.9 F)

Wettest day (Rx1day)

The wettest day of the year at Jalostotitlan, 1941 to 2009. The record is 100.1 mm (3.9 in) in 1972, marked on the chart; the median year is 50.6 mm (2.0 in).

Wettest day (Rx1day) at Jalostotitlan by year
Year	Wettest day (Rx1day)
1941	10.9 mm (0.4 in)
1942	29.0 mm (1.1 in)
1943	33.8 mm (1.3 in)
1944	29.7 mm (1.2 in)
1945	15.7 mm (0.6 in)
1946	24.6 mm (1.0 in)
1947	24.6 mm (1.0 in)
1948	55.9 mm (2.2 in)
1949	36.8 mm (1.4 in)
1950	55.9 mm (2.2 in)
1951	38.9 mm (1.5 in)
1953	30.0 mm (1.2 in)
1954	51.8 mm (2.0 in)
1955	39.9 mm (1.6 in)
1956	50.8 mm (2.0 in)
1957	42.9 mm (1.7 in)
1958	51.8 mm (2.0 in)
1959	32.3 mm (1.3 in)
1960	47.8 mm (1.9 in)
1961	64.8 mm (2.6 in)
1962	54.9 mm (2.2 in)
1963	78.5 mm (3.1 in)
1964	51.1 mm (2.0 in)
1965	46.2 mm (1.8 in)
1966	45.7 mm (1.8 in)
1967	53.6 mm (2.1 in)
1968	47.5 mm (1.9 in)
1969	36.3 mm (1.4 in)
1970	85.3 mm (3.4 in)
1971	59.4 mm (2.3 in)
1972	100.1 mm (3.9 in)
1973	53.8 mm (2.1 in)
1974	26.2 mm (1.0 in)
1975	52.8 mm (2.1 in)
1976	79.8 mm (3.1 in)
1977	42.2 mm (1.7 in)
1978	51.1 mm (2.0 in)
1979	39.9 mm (1.6 in)
1980	56.1 mm (2.2 in)
1981	44.2 mm (1.7 in)
1982	34.8 mm (1.4 in)
1983	37.3 mm (1.5 in)
1984	50.8 mm (2.0 in)
1985	32.5 mm (1.3 in)
1986	59.9 mm (2.4 in)
1987	57.4 mm (2.3 in)
1988	72.4 mm (2.9 in)
1989	80.0 mm (3.1 in)
1990	79.8 mm (3.1 in)
1991	50.8 mm (2.0 in)
1992	59.9 mm (2.4 in)
1993	47.8 mm (1.9 in)
1994	35.8 mm (1.4 in)
1995	55.9 mm (2.2 in)
1996	50.3 mm (2.0 in)
1997	45.0 mm (1.8 in)
1998	42.4 mm (1.7 in)
1999	53.8 mm (2.1 in)
2000	79.8 mm (3.1 in)
2001	59.9 mm (2.4 in)
2002	30.5 mm (1.2 in)
2003	0.0 mm (0.00 in)
2004	43.9 mm (1.7 in)
2005	52.8 mm (2.1 in)
2006	50.3 mm (2.0 in)
2007	82.0 mm (3.2 in)
2008	80.5 mm (3.2 in)
2009	85.6 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Jalostotitlan, 1941 to 2009. The record is 212.6 mm (8.4 in) in 2008, marked on the chart; the median year is 101.1 mm (4.0 in).

Wettest five days (Rx5day) at Jalostotitlan by year
Year	Wettest five days (Rx5day)
1941	30.0 mm (1.2 in)
1942	53.4 mm (2.1 in)
1943	57.9 mm (2.3 in)
1944	65.3 mm (2.6 in)
1945	36.9 mm (1.5 in)
1946	31.5 mm (1.2 in)
1947	58.2 mm (2.3 in)
1948	166.4 mm (6.6 in)
1949	109.5 mm (4.3 in)
1950	126.0 mm (5.0 in)
1951	119.2 mm (4.7 in)
1953	59.4 mm (2.3 in)
1954	81.5 mm (3.2 in)
1955	123.2 mm (4.9 in)
1956	91.7 mm (3.6 in)
1957	80.3 mm (3.2 in)
1958	118.6 mm (4.7 in)
1959	80.6 mm (3.2 in)
1960	144.9 mm (5.7 in)
1961	123.5 mm (4.9 in)
1962	123.0 mm (4.8 in)
1963	123.8 mm (4.9 in)
1964	101.7 mm (4.0 in)
1965	100.8 mm (4.0 in)
1966	66.1 mm (2.6 in)
1967	127.6 mm (5.0 in)
1968	98.1 mm (3.9 in)
1969	65.4 mm (2.6 in)
1970	125.2 mm (4.9 in)
1971	138.2 mm (5.4 in)
1972	138.0 mm (5.4 in)
1973	121.7 mm (4.8 in)
1974	69.8 mm (2.7 in)
1975	111.5 mm (4.4 in)
1976	109.6 mm (4.3 in)
1977	148.6 mm (5.9 in)
1978	85.8 mm (3.4 in)
1979	85.4 mm (3.4 in)
1980	92.5 mm (3.6 in)
1981	98.1 mm (3.9 in)
1982	57.1 mm (2.2 in)
1983	92.4 mm (3.6 in)
1984	80.8 mm (3.2 in)
1985	77.5 mm (3.1 in)
1986	145.3 mm (5.7 in)
1987	112.6 mm (4.4 in)
1988	121.9 mm (4.8 in)
1989	148.1 mm (5.8 in)
1990	104.7 mm (4.1 in)
1991	116.2 mm (4.6 in)
1992	101.3 mm (4.0 in)
1993	107.6 mm (4.2 in)
1994	67.8 mm (2.7 in)
1995	109.5 mm (4.3 in)
1996	72.6 mm (2.9 in)
1997	101.7 mm (4.0 in)
1998	83.1 mm (3.3 in)
1999	94.2 mm (3.7 in)
2000	154.7 mm (6.1 in)
2001	94.7 mm (3.7 in)
2002	30.5 mm (1.2 in)
2003	0.0 mm (0.00 in)
2004	97.5 mm (3.8 in)
2005	105.4 mm (4.1 in)
2006	96.8 mm (3.8 in)
2007	116.6 mm (4.6 in)
2008	212.6 mm (8.4 in)
2009	139.7 mm (5.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Jalostotitlan, 1941 to 2009. The record is 170 days in 1969, marked on the chart; the median year is 82 days.

Longest dry spell (CDD) at Jalostotitlan by year
Year	Longest dry spell (CDD)
1941	23 days
1942	107 days
1943	138 days
1944	52 days
1945	78 days
1946	53 days
1947	117 days
1948	76 days
1949	151 days
1950	107 days
1951	75 days
1953	31 days
1954	128 days
1955	100 days
1956	73 days
1957	66 days
1958	119 days
1959	52 days
1960	167 days
1961	130 days
1962	74 days
1963	58 days
1964	45 days
1965	55 days
1966	56 days
1967	66 days
1968	42 days
1969	170 days
1970	69 days
1971	112 days
1972	129 days
1973	120 days
1974	43 days
1975	124 days
1976	64 days
1977	100 days
1978	92 days
1979	154 days
1980	65 days
1981	50 days
1982	54 days
1983	73 days
1984	92 days
1985	65 days
1986	123 days
1987	93 days
1988	81 days
1989	108 days
1990	67 days
1991	137 days
1992	29 days
1993	82 days
1994	88 days
1995	143 days
1996	112 days
1997	50 days
1998	105 days
1999	156 days
2000	146 days
2001	48 days
2002	19 days
2003	31 days
2004	40 days
2005	102 days
2006	81 days
2007	108 days
2008	103 days
2009	113 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

28 years with a frost

Across 28 years with a frost, the median last spring frost at Jalostotitlan falls on 23 February and the median first autumn frost on 22 November, which leaves a median of 271 days between them.

Fitted over all years, the growing season changes by -1.3 days per decade at this station.

Frost dates and growing season at Jalostotitlan
Measure	Median, all years	Earliest period	Recent period (1950 to 2008)	Recent against earliest	Fitted trend
Last spring frost	23 February	n/a	23 February	n/a	-0.7 days per decade
First autumn frost	22 November	n/a	22 November	n/a	-2.0 days per decade
Growing days	271 days	n/a	271 days	n/a	-1.3 days per decade

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

57 years, 1942 to 2008

A day with at least 49.9 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 98.1 mm (3.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Jalostotitlan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	49.9 mm (2.0 in)
5 years	64.9 mm (2.6 in)
10 years	73.8 mm (2.9 in)
25 years	84.3 mm (3.3 in)
50 years	91.5 mm (3.6 in)
100 years	98.1 mm (3.9 in)	Longer than the 57 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, 57 years of values from 1942 to 2008.

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: 100.1 mm (3.9 in) in 1972; 85.3 mm (3.4 in) in 1970; 82.0 mm (3.2 in) in 2007.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Jalostotitlan, at 1960. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1960 ran 1.1 C (2.0 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Jalostotitlan, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1960	-1.1	-2.0	likely	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 Jalostotitlan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Jalostotitlan 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).