Tocatlan Weather Records (MXN00029027)

Record envelope, standing records and threshold days for Tocatlan (MXN00029027), Mexico, with 40 years of record.

Key Facts for Tocatlan

Tocatlan (MXN00029027) is a weather station in Mexico at 19.38 latitude and -98.02 longitude, 2,557 m (8,389 ft) above sea level.
The station reports from 1966 to 2005, 40 years of record.
1,464 records set at Tocatlan still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Tocatlan set a daily record precipitation of 7.9 mm (0.31 in) on 9 November 2005.

About the Station

Location: Mexico, 19.38 latitude, -98.02 longitude.
Elevation: 2,557 m (8,389 ft).
Period of record: 1966 to 2005, 40 years.
Eligible elements: 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 Tocatlan. 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 Tocatlan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	25.0 C (77.0 F)	-5.0 C (23.0 F)	n/a	n/a
Feb	27.8 C (82.0 F)	-2.2 C (28.0 F)	n/a	n/a
Mar	30.0 C (86.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	31.1 C (88.0 F)	1.7 C (35.1 F)	n/a	n/a
May	32.8 C (91.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	30.6 C (87.1 F)	5.0 C (41.0 F)	n/a	n/a
Jul	26.7 C (80.1 F)	5.0 C (41.0 F)	n/a	n/a
Aug	27.8 C (82.0 F)	5.0 C (41.0 F)	n/a	n/a
Sep	25.6 C (78.1 F)	2.8 C (37.0 F)	n/a	n/a
Oct	27.8 C (82.0 F)	-1.1 C (30.0 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	27.8 C (82.0 F)	-4.4 C (24.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tocatlan still stand. 1987 holds the most, with 144.

Wettest Day of Each Month

Jun: 70.9 mm (2.8 in)

The wettest day on record for each calendar month at Tocatlan. The most was 70.9 mm (2.8 in) on 8 June 1992.

Record daily precipitation for each month at Tocatlan
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	11 January 1967
Feb	34.8 mm (1.4 in)	24 February 1981
Mar	45.0 mm (1.8 in)	19 March 1997
Apr	32.8 mm (1.3 in)	8 April 1997
May	40.4 mm (1.6 in)	13 May 1977
Jun	70.9 mm (2.8 in)	8 June 1992
Jul	47.8 mm (1.9 in)	25 July 1966
Aug	55.9 mm (2.2 in)	26 August 1979
Sep	58.9 mm (2.3 in)	4 September 1988
Oct	60.5 mm (2.4 in)	4 October 1999
Nov	31.8 mm (1.3 in)	4 November 1967
Dec	33.8 mm (1.3 in)	30 December 1995

Period of Record Coverage

1985 to 2005

18 years of record at Tocatlan, 1985 to 2005. 2 years have data for under 90 percent of days and are left out of rankings: 1985, 1988.

Days with data per year at Tocatlan
Year	Days with data	Share of year	Complete
1985	162	44%	No
1986	365	100%	Yes
1987	364	100%	Yes
1988	274	75%	No
1992	366	100%	Yes
1993	365	100%	Yes
1994	362	99%	Yes
1995	364	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	363	99%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	334	92%	Yes
2003	329	90%	Yes
2004	366	100%	Yes
2005	361	99%	Yes

Latest Records

Latest records at Tocatlan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 November 2005	Tocatlan, MX	daily rain	7.9 mm (0.31 in)	7.1 mm (0.28 in)	22 years	20 of 100 (Routine)
13 September 2005	Tocatlan, MX	daily rain	33.8 mm (1.3 in)	10.9 mm (0.4 in)	8 years	18 of 100 (Routine)
10 August 2005	Tocatlan, MX	daily rain (Tie)	33.8 mm (1.3 in)	tie	10 years	1 of 100 (Routine)
7 July 2005	Tocatlan, MX	daily rain	22.4 mm (0.9 in)	1.1 mm (0.04 in)	3 years	5 of 100 (Routine)
25 June 2005	Tocatlan, MX	daily rain	32.8 mm (1.3 in)	7.9 mm (0.31 in)	11 years	14 of 100 (Routine)
9 October 2004	Tocatlan, MX	daily rain	28.4 mm (1.1 in)	11.1 mm (0.4 in)	37 years	25 of 100 (Routine)
27 September 2004	Tocatlan, MX	daily rain	45.5 mm (1.8 in)	23.7 mm (0.9 in)	31 years	39 of 100 (Notable)
3 August 2004	Tocatlan, MX	daily rain	22.9 mm (0.9 in)	1.1 mm (0.04 in)	33 years	13 of 100 (Routine)
24 June 2004	Tocatlan, MX	daily rain	31.8 mm (1.3 in)	3.4 mm (0.13 in)	17 years	11 of 100 (Routine)
11 May 2004	Tocatlan, MX	daily rain	31.0 mm (1.2 in)	10.7 mm (0.4 in)	23 years	22 of 100 (Routine)
4 May 2004	Tocatlan, MX	daily rain	14.5 mm (0.6 in)	5.6 mm (0.22 in)	19 years	14 of 100 (Routine)
29 April 2004	Tocatlan, MX	daily rain	20.3 mm (0.8 in)	6.3 mm (0.25 in)	18 years	17 of 100 (Routine)
31 January 2004	Tocatlan, MX	daily rain	21.8 mm (0.9 in)	6.1 mm (0.24 in)	12 years	16 of 100 (Routine)
13 October 2003	Tocatlan, MX	daily rain	21.8 mm (0.9 in)	0.5 mm (0.02 in)	21 years	9 of 100 (Routine)
6 October 2003	Tocatlan, MX	daily rain	24.4 mm (1.0 in)	14.5 mm (0.6 in)	4 years	18 of 100 (Routine)
25 August 2003	Tocatlan, MX	daily rain	31.5 mm (1.2 in)	12.7 mm (0.5 in)	28 years	24 of 100 (Routine)
18 August 2003	Tocatlan, MX	daily rain	20.3 mm (0.8 in)	5.3 mm (0.21 in)	24 years	15 of 100 (Routine)
29 July 2003	Tocatlan, MX	daily rain	26.9 mm (1.1 in)	2.0 mm (0.08 in)	24 years	12 of 100 (Routine)
23 July 2003	Tocatlan, MX	daily rain (Tie)	23.4 mm (0.9 in)	tie	30 years	3 of 100 (Routine)
3 June 2003	Tocatlan, MX	daily rain	33.3 mm (1.3 in)	13.5 mm (0.5 in)	21 years	21 of 100 (Routine)

Climate Trend

14 complete years, 1986 to 2005

One stripe for each of 14 complete years at Tocatlan, 1986 to 2005. Blue stripes are years cooler than the station's own mean of 14.5 C (58.2 F); red stripes are warmer. The coolest year was 2001, at 14.0 C (57.1 F), and the warmest was 1998, at 15.4 C (59.6 F). The strongest colour marks a difference of 0.9 C (1.6 F).

Annual mean temperature at Tocatlan as warming stripes, 1986 to 2005
Year	Annual mean temperature	Difference from the station mean
1986	14.3 C	-0.21 C
1987	14.7 C	+0.12 C
1992	14.1 C	-0.45 C
1993	14.6 C	+0.08 C
1994	15.0 C	+0.51 C
1995	14.9 C	+0.34 C
1996	14.4 C	-0.18 C
1997	14.4 C	-0.13 C
1998	15.4 C	+0.83 C
1999	14.3 C	-0.26 C
2000	14.4 C	-0.18 C
2001	14.0 C	-0.57 C
2004	14.1 C	-0.46 C
2005	15.1 C	+0.56 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

1966 to 2005

Yearly extremes at Tocatlan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.8 C (91.0 F)	1998	30.0 C (86.0 F)	18
Coldest night (TNn)	-5.0 C (23.0 F)	1987	-2.2 C (28.0 F)	18
Wettest day (Rx1day)	70.9 mm (2.8 in)	1992	39.9 mm (1.6 in)	37
Wettest five days (Rx5day)	126.6 mm (5.0 in)	1970	82.5 mm (3.2 in)	37
Longest dry spell (CDD)	95 days	2005	58 days	37

Hottest day (TXx)

The hottest day of the year at Tocatlan, 1966 to 2005. The record is 32.8 C (91.0 F) in 1998, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at Tocatlan by year
Year	Hottest day (TXx)
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	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	25.0 C (77.0 F)
1986	30.0 C (86.0 F)
1987	28.3 C (82.9 F)
1988	30.6 C (87.1 F)
1992	28.9 C (84.0 F)
1993	30.0 C (86.0 F)
1994	28.9 C (84.0 F)
1995	30.0 C (86.0 F)
1996	28.9 C (84.0 F)
1997	26.7 C (80.1 F)
1998	32.8 C (91.0 F)
1999	30.0 C (86.0 F)
2000	30.0 C (86.0 F)
2001	30.6 C (87.1 F)
2002	30.0 C (86.0 F)
2003	31.7 C (89.1 F)
2004	28.3 C (82.9 F)
2005	30.0 C (86.0 F)

Coldest night (TNn)

The coldest night of the year at Tocatlan, 1966 to 2005. The record is -5.0 C (23.0 F) in 1987, marked on the chart; the median year is -2.2 C (28.0 F).

Coldest night (TNn) at Tocatlan by year
Year	Coldest night (TNn)
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	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	0.6 C (33.1 F)
1986	-3.3 C (26.1 F)
1987	-5.0 C (23.0 F)
1988	-5.0 C (23.0 F)
1992	0.6 C (33.1 F)
1993	-1.1 C (30.0 F)
1994	-4.4 C (24.1 F)
1995	0.6 C (33.1 F)
1996	-3.3 C (26.1 F)
1997	-3.3 C (26.1 F)
1998	-0.6 C (30.9 F)
1999	-2.2 C (28.0 F)
2000	-2.2 C (28.0 F)
2001	-1.1 C (30.0 F)
2002	-2.2 C (28.0 F)
2003	-3.3 C (26.1 F)
2004	-4.4 C (24.1 F)
2005	-1.1 C (30.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tocatlan, 1966 to 2005. The record is 70.9 mm (2.8 in) in 1992, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at Tocatlan by year
Year	Wettest day (Rx1day)
1966	47.8 mm (1.9 in)
1967	35.8 mm (1.4 in)
1968	27.4 mm (1.1 in)
1969	39.4 mm (1.6 in)
1970	54.9 mm (2.2 in)
1971	36.8 mm (1.4 in)
1972	49.0 mm (1.9 in)
1973	63.0 mm (2.5 in)
1974	43.9 mm (1.7 in)
1975	32.8 mm (1.3 in)
1976	25.9 mm (1.0 in)
1977	40.4 mm (1.6 in)
1978	39.9 mm (1.6 in)
1979	55.9 mm (2.2 in)
1980	31.8 mm (1.3 in)
1981	48.8 mm (1.9 in)
1982	39.9 mm (1.6 in)
1983	22.9 mm (0.9 in)
1984	54.4 mm (2.1 in)
1985	27.4 mm (1.1 in)
1986	35.3 mm (1.4 in)
1987	38.9 mm (1.5 in)
1988	65.8 mm (2.6 in)
1992	70.9 mm (2.8 in)
1993	48.8 mm (1.9 in)
1994	50.8 mm (2.0 in)
1995	34.3 mm (1.4 in)
1996	47.0 mm (1.9 in)
1997	45.0 mm (1.8 in)
1998	37.8 mm (1.5 in)
1999	60.5 mm (2.4 in)
2000	36.8 mm (1.4 in)
2001	36.8 mm (1.4 in)
2002	26.4 mm (1.0 in)
2003	33.3 mm (1.3 in)
2004	45.5 mm (1.8 in)
2005	33.8 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tocatlan, 1966 to 2005. The record is 126.6 mm (5.0 in) in 1970, marked on the chart; the median year is 82.5 mm (3.2 in).

Wettest five days (Rx5day) at Tocatlan by year
Year	Wettest five days (Rx5day)
1966	71.9 mm (2.8 in)
1967	53.4 mm (2.1 in)
1968	86.6 mm (3.4 in)
1969	93.0 mm (3.7 in)
1970	126.6 mm (5.0 in)
1971	73.4 mm (2.9 in)
1972	72.7 mm (2.9 in)
1973	102.9 mm (4.1 in)
1974	88.4 mm (3.5 in)
1975	75.7 mm (3.0 in)
1976	90.2 mm (3.6 in)
1977	74.6 mm (2.9 in)
1978	96.2 mm (3.8 in)
1979	113.8 mm (4.5 in)
1980	78.5 mm (3.1 in)
1981	99.8 mm (3.9 in)
1982	71.7 mm (2.8 in)
1983	35.3 mm (1.4 in)
1984	116.3 mm (4.6 in)
1985	68.8 mm (2.7 in)
1986	81.8 mm (3.2 in)
1987	88.9 mm (3.5 in)
1988	91.1 mm (3.6 in)
1992	112.3 mm (4.4 in)
1993	105.0 mm (4.1 in)
1994	79.5 mm (3.1 in)
1995	103.5 mm (4.1 in)
1996	78.1 mm (3.1 in)
1997	82.5 mm (3.2 in)
1998	83.9 mm (3.3 in)
1999	125.5 mm (4.9 in)
2000	79.8 mm (3.1 in)
2001	57.9 mm (2.3 in)
2002	75.7 mm (3.0 in)
2003	83.8 mm (3.3 in)
2004	66.3 mm (2.6 in)
2005	70.1 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tocatlan, 1966 to 2005. The record is 95 days in 2005, marked on the chart; the median year is 58 days.

Longest dry spell (CDD) at Tocatlan by year
Year	Longest dry spell (CDD)
1966	76 days
1967	67 days
1968	44 days
1969	61 days
1970	58 days
1971	82 days
1972	71 days
1973	56 days
1974	70 days
1975	63 days
1976	48 days
1977	43 days
1978	43 days
1979	44 days
1980	54 days
1981	32 days
1982	61 days
1983	68 days
1984	64 days
1985	49 days
1986	53 days
1987	43 days
1988	42 days
1992	51 days
1993	67 days
1994	46 days
1995	39 days
1996	54 days
1997	70 days
1998	92 days
1999	80 days
2000	68 days
2001	55 days
2002	51 days
2003	70 days
2004	67 days
2005	95 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

35 years, 1966 to 2005

A day with at least 40.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 75.5 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Tocatlan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	40.6 mm (1.6 in)
5 years	50.6 mm (2.0 in)
10 years	56.9 mm (2.2 in)
25 years	64.6 mm (2.5 in)
50 years	70.1 mm (2.8 in)	Longer than the 35 years of record
100 years	75.5 mm (3.0 in)	Longer than the 35 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, 35 years of values from 1966 to 2005.

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: 70.9 mm (2.8 in) in 1992; 63.0 mm (2.5 in) in 1973; 60.5 mm (2.4 in) in 1999.

Download the Data

Data for Tocatlan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tocatlan 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).