Tototlan Weather Records (MXN00014154)

Record envelope, standing records and threshold days for Tototlan (MXN00014154), Mexico, with 60 years of record.

Key Facts for Tototlan

Tototlan (MXN00014154) is a weather station in Mexico at 20.53 latitude and -102.78 longitude, 1,540 m (5,052 ft) above sea level.
The station reports from 1941 to 2000, 60 years of record.
1,464 records set at Tototlan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Tototlan tied a daily record low maximum temperature of 26.1 C (79.0 F) on 29 February 2000.

About the Station

Location: Mexico, 20.53 latitude, -102.78 longitude.
Elevation: 1,540 m (5,052 ft).
Period of record: 1941 to 2000, 60 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 Tototlan. 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 Tototlan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.8 C (100.0 F)	-5.6 C (21.9 F)	n/a	n/a
Feb	40.0 C (104.0 F)	-5.6 C (21.9 F)	n/a	n/a
Mar	41.1 C (106.0 F)	-1.1 C (30.0 F)	n/a	n/a
Apr	41.1 C (106.0 F)	0.6 C (33.1 F)	n/a	n/a
May	45.6 C (114.1 F)	2.8 C (37.0 F)	n/a	n/a
Jun	41.7 C (107.1 F)	2.8 C (37.0 F)	n/a	n/a
Jul	37.2 C (99.0 F)	3.9 C (39.0 F)	n/a	n/a
Aug	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	0.6 C (33.1 F)	n/a	n/a
Oct	39.4 C (102.9 F)	0.0 C (32.0 F)	n/a	n/a
Nov	39.4 C (102.9 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	37.8 C (100.0 F)	-5.6 C (21.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tototlan still stand. 1961 holds the most, with 120.

Standing records at Tototlan by the year they were set
Year set	Standing records
1941	10
1942	34
1943	19
1944	19
1945	6
1946	6
1947	15
1948	3
1949	8
1950	17
1951	27
1952	11
1953	9
1954	3
1955	8
1956	7
1957	7
1958	14
1959	9
1960	9
1961	120
1962	102
1963	34
1964	36
1965	72
1966	54
1967	22
1968	38
1969	11
1970	23
1971	20
1972	19
1973	19
1974	19
1975	22
1976	32
1977	18
1978	26
1979	36
1980	20
1981	16
1982	16
1983	40
1984	9
1985	105
1986	63
1987	11
1988	3
1989	46
1990	8
1991	13
1992	18
1993	10
1994	4
1995	35
1996	51
1997	14
1998	15
1999	2
2000	1

All-Time Record Progression

10 new records

10 all-time records were set at Tototlan between 22 December 1972 and 13 December 1997. Each dot is a new record.

When Tototlan set new all-time records
Date	Kind	Detail
1972-12-22	Record low minimum temperature	Record low minimum temperature -3.9 C (25.0 F)
1973-01-30	Record low minimum temperature	Record low minimum temperature -5.0 C (23.0 F)
1979-12-02	Record low maximum temperature	Record low maximum temperature 11.7 C (53.1 F)
1986-05-13	Record high maximum temperature	Record high maximum temperature 42.8 C (109.0 F)
1986-05-14	Record high maximum temperature	Record high maximum temperature 45.0 C (113.0 F)
1986-05-15	Record high maximum temperature	Record high maximum temperature 45.6 C (114.1 F)
1986-05-26	Record daily precipitation	Record daily precipitation 126.0 mm (5.0 in)
1989-08-04	Record high minimum temperature	Record high minimum temperature 25.0 C (77.0 F)
1996-01-15	Record low minimum temperature	Record low minimum temperature -5.6 C (21.9 F)
1997-12-13	Record low maximum temperature	Record low maximum temperature 10.0 C (50.0 F)

Wettest Day of Each Month

May: 126.0 mm (5.0 in)

The wettest day on record for each calendar month at Tototlan. The most was 126.0 mm (5.0 in) on 26 May 1986.

Record daily precipitation for each month at Tototlan
Month	Record daily precipitation (mm)	Date
Jan	68.8 mm (2.7 in)	12 January 1967
Feb	24.4 mm (1.0 in)	10 February 1968
Mar	32.8 mm (1.3 in)	3 March 1968
Apr	37.8 mm (1.5 in)	15 April 1959
May	126.0 mm (5.0 in)	26 May 1986
Jun	85.9 mm (3.4 in)	27 June 1985
Jul	86.4 mm (3.4 in)	8 July 1976
Aug	71.4 mm (2.8 in)	28 August 1997
Sep	86.4 mm (3.4 in)	15 September 1971
Oct	66.8 mm (2.6 in)	12 October 1976
Nov	68.3 mm (2.7 in)	18 November 1976
Dec	63.5 mm (2.5 in)	12 December 1963

Period of Record Coverage

1941 to 2000

60 years of record at Tototlan, 1941 to 2000. 11 years have data for under 90 percent of days and are left out of rankings: 1941, 1986, 1987, 1988, 1990, 1991, 1992, 1993 and others.

Days with data per year at Tototlan
Year	Days with data	Share of year	Complete
1941	58	16%	No
1942	361	99%	Yes
1943	356	98%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	366	100%	Yes
1949	365	100%	Yes
1950	365	100%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	351	96%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	364	100%	Yes
1967	364	100%	Yes
1968	365	100%	Yes
1969	359	98%	Yes
1970	362	99%	Yes
1971	364	100%	Yes
1972	362	99%	Yes
1973	361	99%	Yes
1974	363	99%	Yes
1975	360	99%	Yes
1976	361	99%	Yes
1977	357	98%	Yes
1978	361	99%	Yes
1979	358	98%	Yes
1980	364	99%	Yes
1981	361	99%	Yes
1982	359	98%	Yes
1983	355	97%	Yes
1984	363	99%	Yes
1985	363	99%	Yes
1986	243	67%	No
1987	156	43%	No
1988	140	38%	No
1989	365	100%	Yes
1990	273	75%	No
1991	302	83%	No
1992	325	89%	No
1993	294	81%	No
1994	359	98%	Yes
1995	365	100%	Yes
1996	365	100%	Yes
1997	134	37%	No
1998	357	98%	Yes
1999	269	74%	No
2000	150	41%	No

Latest Records

Latest records at Tototlan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 February 2000	Tototlan, MX	daily low max (Tie)	26.1 C (79.0 F)	tie	20 years	3 of 100 (Routine)
16 February 2000	Tototlan, MX	daily low max (Tie)	20.0 C (68.0 F)	tie	14 years	2 of 100 (Routine)
27 January 2000	Tototlan, MX	daily low min	-1.1 C (30.0 F)	0.5 C (0.9 F)	24 years	14 of 100 (Routine)
12 December 1999	Tototlan, MX	daily low min (Tie)	-1.1 C (30.0 F)	tie	29 years	3 of 100 (Routine)
17 July 1999	Tototlan, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	24 years	3 of 100 (Routine)
3 June 1999	Tototlan, MX	daily rain	31.0 mm (1.2 in)	2.0 mm (0.08 in)	56 years	23 of 100 (Routine)
2 June 1999	Tototlan, MX	daily rain	41.9 mm (1.6 in)	23.1 mm (0.9 in)	28 years	31 of 100 (Routine)
21 May 1999	Tototlan, MX	daily rain	5.8 mm (0.23 in)	4.0 mm (0.16 in)	44 years	20 of 100 (Routine)
16 May 1999	Tototlan, MX	daily rain	15.0 mm (0.6 in)	8.9 mm (0.35 in)	32 years	20 of 100 (Routine)
25 February 1999	Tototlan, MX	daily low max (Tie)	25.0 C (77.0 F)	tie	44 years	4 of 100 (Routine)
24 February 1999	Tototlan, MX	daily low max	23.3 C (73.9 F)	0.6 C (1.1 F)	40 years	18 of 100 (Routine)
15 February 1999	Tototlan, MX	daily low max	22.2 C (72.0 F)	2.8 C (5.0 F)	23 years	20 of 100 (Routine)
14 February 1999	Tototlan, MX	daily low max (Tie)	21.7 C (71.1 F)	tie	56 years	5 of 100 (Routine)
25 December 1998	Tototlan, MX	daily low max (Tie)	21.1 C (70.0 F)	tie	17 years	2 of 100 (Routine)
22 December 1998	Tototlan, MX	daily low max (Tie)	21.7 C (71.1 F)	tie	21 years	2 of 100 (Routine)
2 November 1998	Tototlan, MX	daily low min	3.3 C (37.9 F)	0.6 C (1.1 F)	19 years	11 of 100 (Routine)
26 October 1998	Tototlan, MX	daily low max	23.9 C (75.0 F)	0.5 C (0.9 F)	39 years	17 of 100 (Routine)
25 October 1998	Tototlan, MX	daily low max	23.3 C (73.9 F)	1.7 C (3.1 F)	20 years	16 of 100 (Routine)
24 October 1998	Tototlan, MX	daily low max	22.2 C (72.0 F)	1.7 C (3.1 F)	23 years	16 of 100 (Routine)
23 October 1998	Tototlan, MX	daily low max	20.0 C (68.0 F)	2.8 C (5.0 F)	20 years	20 of 100 (Routine)

Climate Trend

48 complete years, 1942 to 1998

One stripe for each of 48 complete years at Tototlan, 1942 to 1998. Blue stripes are years cooler than the station's own mean of 20.7 C (69.2 F); red stripes are warmer. The coolest year was 1974, at 18.3 C (65.0 F), and the warmest was 1962, at 24.8 C (76.7 F). The strongest colour marks a difference of 4.2 C (7.6 F).

Annual mean temperature at Tototlan as warming stripes, 1942 to 1998
Year	Annual mean temperature	Difference from the station mean
1942	22.0 C	+1.30 C
1943	21.5 C	+0.89 C
1944	21.1 C	+0.48 C
1945	21.9 C	+1.26 C
1946	21.8 C	+1.18 C
1947	21.7 C	+1.03 C
1948	21.8 C	+1.16 C
1949	21.7 C	+1.08 C
1950	21.6 C	+0.94 C
1951	21.6 C	+0.93 C
1952	21.0 C	+0.30 C
1953	20.7 C	+0.04 C
1954	20.8 C	+0.14 C
1955	19.9 C	-0.73 C
1956	19.9 C	-0.73 C
1957	20.7 C	0.00 C
1958	20.4 C	-0.24 C
1960	20.1 C	-0.57 C
1961	24.8 C	+4.10 C
1962	24.8 C	+4.17 C
1963	24.1 C	+3.43 C
1964	23.3 C	+2.66 C
1965	24.5 C	+3.81 C
1966	24.1 C	+3.43 C
1967	23.9 C	+3.23 C
1968	23.9 C	+3.26 C
1969	19.3 C	-1.36 C
1970	18.8 C	-1.87 C
1971	18.8 C	-1.88 C
1972	19.0 C	-1.70 C
1973	18.5 C	-2.14 C
1974	18.3 C	-2.32 C
1975	18.4 C	-2.28 C
1976	18.5 C	-2.14 C
1977	18.4 C	-2.28 C
1978	18.4 C	-2.24 C
1979	18.5 C	-2.14 C
1980	19.0 C	-1.68 C
1981	18.8 C	-1.83 C
1982	19.2 C	-1.42 C
1983	18.4 C	-2.24 C
1984	19.0 C	-1.61 C
1985	18.6 C	-2.04 C
1989	21.6 C	+0.90 C
1994	20.0 C	-0.69 C
1995	20.2 C	-0.41 C
1996	19.5 C	-1.16 C
1998	18.8 C	-1.82 C

The annual mean temperature here has fallen by 0.6 C (0.3 to 0.9) per decade over 1942 to 1998. In Fahrenheit: 1.1 F (0.5 to 1.7) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tototlan
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.6 C (-0.9 to -0.3) per decade	-1.1 F (-1.7 to -0.5) per decade	1942 to 1998	48	Fall
Mean daily maximum	-0.4 C (-0.7 to -0.1) per decade	-0.8 F (-1.3 to -0.2) per decade	1942 to 1998	48	Fall
Mean daily minimum	-0.8 C (-1.2 to -0.4) per decade	-1.4 F (-2.2 to -0.7) per decade	1942 to 1998	48	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 2000

Yearly extremes at Tototlan: 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)	1986	37.8 C (100.0 F)	60
Coldest night (TNn)	-5.6 C (21.9 F)	1996	0.0 C (32.0 F)	60
Wettest day (Rx1day)	126.0 mm (5.0 in)	1986	51.7 mm (2.0 in)	60
Wettest five days (Rx5day)	221.3 mm (8.7 in)	1976	97.5 mm (3.8 in)	60
Longest dry spell (CDD)	168 days	1991	96 days	60

Hottest day (TXx)

The hottest day of the year at Tototlan, 1941 to 2000. The record is 45.6 C (114.1 F) in 1986, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Tototlan by year
Year	Hottest day (TXx)
1941	37.8 C (100.0 F)
1942	37.8 C (100.0 F)
1943	37.8 C (100.0 F)
1944	35.6 C (96.1 F)
1945	37.8 C (100.0 F)
1946	38.9 C (102.0 F)
1947	36.7 C (98.1 F)
1948	38.9 C (102.0 F)
1949	39.4 C (102.9 F)
1950	40.0 C (104.0 F)
1951	38.9 C (102.0 F)
1952	40.0 C (104.0 F)
1953	40.0 C (104.0 F)
1954	37.8 C (100.0 F)
1955	37.8 C (100.0 F)
1956	36.7 C (98.1 F)
1957	37.2 C (99.0 F)
1958	36.7 C (98.1 F)
1959	36.1 C (97.0 F)
1960	38.3 C (100.9 F)
1961	41.1 C (106.0 F)
1962	41.7 C (107.1 F)
1963	39.4 C (102.9 F)
1964	39.4 C (102.9 F)
1965	40.6 C (105.1 F)
1966	40.6 C (105.1 F)
1967	37.8 C (100.0 F)
1968	40.0 C (104.0 F)
1969	36.1 C (97.0 F)
1970	36.1 C (97.0 F)
1971	35.0 C (95.0 F)
1972	36.1 C (97.0 F)
1973	36.7 C (98.1 F)
1974	35.6 C (96.1 F)
1975	35.0 C (95.0 F)
1976	35.6 C (96.1 F)
1977	35.0 C (95.0 F)
1978	35.6 C (96.1 F)
1979	37.8 C (100.0 F)
1980	36.7 C (98.1 F)
1981	36.1 C (97.0 F)
1982	37.8 C (100.0 F)
1983	37.8 C (100.0 F)
1984	36.7 C (98.1 F)
1985	40.0 C (104.0 F)
1986	45.6 C (114.1 F)
1987	37.8 C (100.0 F)
1988	38.9 C (102.0 F)
1989	38.3 C (100.9 F)
1990	38.3 C (100.9 F)
1991	38.3 C (100.9 F)
1992	38.3 C (100.9 F)
1993	38.3 C (100.9 F)
1994	37.2 C (99.0 F)
1995	39.4 C (102.9 F)
1996	38.3 C (100.9 F)
1997	33.3 C (91.9 F)
1998	35.6 C (96.1 F)
1999	34.4 C (93.9 F)
2000	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Tototlan, 1941 to 2000. The record is -5.6 C (21.9 F) in 1996, marked on the chart; the median year is 0.0 C (32.0 F).

Coldest night (TNn) at Tototlan by year
Year	Coldest night (TNn)
1941	7.8 C (46.0 F)
1942	0.0 C (32.0 F)
1943	0.6 C (33.1 F)
1944	1.7 C (35.1 F)
1945	3.9 C (39.0 F)
1946	2.8 C (37.0 F)
1947	2.8 C (37.0 F)
1948	2.8 C (37.0 F)
1949	0.6 C (33.1 F)
1950	0.0 C (32.0 F)
1951	0.0 C (32.0 F)
1952	0.0 C (32.0 F)
1953	0.0 C (32.0 F)
1954	1.7 C (35.1 F)
1955	-2.2 C (28.0 F)
1956	-1.1 C (30.0 F)
1957	0.6 C (33.1 F)
1958	0.6 C (33.1 F)
1959	0.0 C (32.0 F)
1960	0.6 C (33.1 F)
1961	6.7 C (44.1 F)
1962	5.6 C (42.1 F)
1963	5.0 C (41.0 F)
1964	1.7 C (35.1 F)
1965	5.0 C (41.0 F)
1966	5.0 C (41.0 F)
1967	2.8 C (37.0 F)
1968	5.0 C (41.0 F)
1969	-1.7 C (28.9 F)
1970	-3.3 C (26.1 F)
1971	-3.3 C (26.1 F)
1972	-3.9 C (25.0 F)
1973	-5.0 C (23.0 F)
1974	0.0 C (32.0 F)
1975	-4.4 C (24.1 F)
1976	-5.0 C (23.0 F)
1977	-2.2 C (28.0 F)
1978	-2.2 C (28.0 F)
1979	-3.3 C (26.1 F)
1980	-2.8 C (27.0 F)
1981	-3.9 C (25.0 F)
1982	-2.2 C (28.0 F)
1983	-4.4 C (24.1 F)
1984	-0.6 C (30.9 F)
1985	2.8 C (37.0 F)
1986	2.8 C (37.0 F)
1987	2.8 C (37.0 F)
1988	4.4 C (39.9 F)
1989	-5.0 C (23.0 F)
1990	-1.7 C (28.9 F)
1991	0.0 C (32.0 F)
1992	0.0 C (32.0 F)
1993	-3.9 C (25.0 F)
1994	-3.9 C (25.0 F)
1995	-5.0 C (23.0 F)
1996	-5.6 C (21.9 F)
1997	-5.6 C (21.9 F)
1998	-5.6 C (21.9 F)
1999	-2.2 C (28.0 F)
2000	-1.1 C (30.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tototlan, 1941 to 2000. The record is 126.0 mm (5.0 in) in 1986, marked on the chart; the median year is 51.7 mm (2.0 in).

Wettest day (Rx1day) at Tototlan by year
Year	Wettest day (Rx1day)
1941	18.3 mm (0.7 in)
1942	48.3 mm (1.9 in)
1943	85.3 mm (3.4 in)
1944	51.8 mm (2.0 in)
1945	48.3 mm (1.9 in)
1946	59.2 mm (2.3 in)
1947	36.3 mm (1.4 in)
1948	53.6 mm (2.1 in)
1949	67.3 mm (2.6 in)
1950	39.9 mm (1.6 in)
1951	31.5 mm (1.2 in)
1952	68.1 mm (2.7 in)
1953	50.8 mm (2.0 in)
1954	37.8 mm (1.5 in)
1955	83.8 mm (3.3 in)
1956	57.9 mm (2.3 in)
1957	50.8 mm (2.0 in)
1958	56.4 mm (2.2 in)
1959	39.4 mm (1.6 in)
1960	49.8 mm (2.0 in)
1961	43.2 mm (1.7 in)
1962	38.1 mm (1.5 in)
1963	85.3 mm (3.4 in)
1964	73.2 mm (2.9 in)
1965	51.6 mm (2.0 in)
1966	66.3 mm (2.6 in)
1967	68.8 mm (2.7 in)
1968	73.7 mm (2.9 in)
1969	31.8 mm (1.3 in)
1970	85.9 mm (3.4 in)
1971	86.4 mm (3.4 in)
1972	44.5 mm (1.8 in)
1973	72.9 mm (2.9 in)
1974	68.8 mm (2.7 in)
1975	42.9 mm (1.7 in)
1976	86.4 mm (3.4 in)
1977	77.5 mm (3.1 in)
1978	59.4 mm (2.3 in)
1979	46.7 mm (1.8 in)
1980	52.1 mm (2.1 in)
1981	69.6 mm (2.7 in)
1982	66.3 mm (2.6 in)
1983	47.5 mm (1.9 in)
1984	35.8 mm (1.4 in)
1985	85.9 mm (3.4 in)
1986	126.0 mm (5.0 in)
1987	21.8 mm (0.9 in)
1988	0.0 mm (0.00 in)
1989	50.3 mm (2.0 in)
1990	38.4 mm (1.5 in)
1991	24.9 mm (1.0 in)
1992	50.0 mm (2.0 in)
1993	47.2 mm (1.9 in)
1994	63.8 mm (2.5 in)
1995	56.6 mm (2.2 in)
1996	58.4 mm (2.3 in)
1997	71.4 mm (2.8 in)
1998	50.8 mm (2.0 in)
1999	41.9 mm (1.6 in)
2000	3.8 mm (0.15 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tototlan, 1941 to 2000. The record is 221.3 mm (8.7 in) in 1976, marked on the chart; the median year is 97.5 mm (3.8 in).

Wettest five days (Rx5day) at Tototlan by year
Year	Wettest five days (Rx5day)
1941	18.3 mm (0.7 in)
1942	90.0 mm (3.5 in)
1943	101.7 mm (4.0 in)
1944	121.9 mm (4.8 in)
1945	106.8 mm (4.2 in)
1946	97.9 mm (3.9 in)
1947	63.5 mm (2.5 in)
1948	103.9 mm (4.1 in)
1949	102.6 mm (4.0 in)
1950	88.2 mm (3.5 in)
1951	61.7 mm (2.4 in)
1952	97.1 mm (3.8 in)
1953	102.9 mm (4.1 in)
1954	64.3 mm (2.5 in)
1955	103.3 mm (4.1 in)
1956	93.7 mm (3.7 in)
1957	74.4 mm (2.9 in)
1958	120.7 mm (4.8 in)
1959	86.3 mm (3.4 in)
1960	99.0 mm (3.9 in)
1961	77.0 mm (3.0 in)
1962	64.7 mm (2.5 in)
1963	132.3 mm (5.2 in)
1964	74.0 mm (2.9 in)
1965	68.4 mm (2.7 in)
1966	83.9 mm (3.3 in)
1967	120.1 mm (4.7 in)
1968	162.7 mm (6.4 in)
1969	89.2 mm (3.5 in)
1970	155.5 mm (6.1 in)
1971	157.0 mm (6.2 in)
1972	73.6 mm (2.9 in)
1973	159.0 mm (6.3 in)
1974	95.8 mm (3.8 in)
1975	105.1 mm (4.1 in)
1976	221.3 mm (8.7 in)
1977	160.9 mm (6.3 in)
1978	67.5 mm (2.7 in)
1979	92.7 mm (3.6 in)
1980	118.9 mm (4.7 in)
1981	138.0 mm (5.4 in)
1982	102.9 mm (4.1 in)
1983	88.3 mm (3.5 in)
1984	65.1 mm (2.6 in)
1985	151.0 mm (5.9 in)
1986	152.4 mm (6.0 in)
1987	83.2 mm (3.3 in)
1988	0.0 mm (0.00 in)
1989	82.5 mm (3.2 in)
1990	73.2 mm (2.9 in)
1991	61.5 mm (2.4 in)
1992	100.9 mm (4.0 in)
1993	96.2 mm (3.8 in)
1994	131.6 mm (5.2 in)
1995	115.6 mm (4.6 in)
1996	89.2 mm (3.5 in)
1997	120.9 mm (4.8 in)
1998	106.7 mm (4.2 in)
1999	119.3 mm (4.7 in)
2000	11.2 mm (0.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tototlan, 1941 to 2000. The record is 168 days in 1991, marked on the chart; the median year is 96 days.

Longest dry spell (CDD) at Tototlan by year
Year	Longest dry spell (CDD)
1941	24 days
1942	98 days
1943	154 days
1944	59 days
1945	118 days
1946	76 days
1947	109 days
1948	71 days
1949	68 days
1950	89 days
1951	74 days
1952	59 days
1953	151 days
1954	102 days
1955	121 days
1956	59 days
1957	69 days
1958	119 days
1959	98 days
1960	157 days
1961	118 days
1962	106 days
1963	103 days
1964	153 days
1965	68 days
1966	80 days
1967	122 days
1968	83 days
1969	128 days
1970	69 days
1971	115 days
1972	67 days
1973	57 days
1974	115 days
1975	124 days
1976	61 days
1977	87 days
1978	80 days
1979	105 days
1980	80 days
1981	47 days
1982	85 days
1983	125 days
1984	128 days
1985	134 days
1986	90 days
1987	44 days
1988	72 days
1989	163 days
1990	40 days
1991	168 days
1992	94 days
1993	63 days
1994	141 days
1995	141 days
1996	114 days
1997	92 days
1998	126 days
1999	92 days
2000	120 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

51 years, 1942 to 1998

A day with at least 56.2 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 100.9 mm (4.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Tototlan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	56.2 mm (2.2 in)
5 years	71.4 mm (2.8 in)
10 years	80.0 mm (3.1 in)
25 years	89.4 mm (3.5 in)
50 years	95.5 mm (3.8 in)
100 years	100.9 mm (4.0 in)	Longer than the 51 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, 51 years of values from 1942 to 1998.

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: 86.4 mm (3.4 in) in 1971; 86.4 mm (3.4 in) in 1976; 85.9 mm (3.4 in) in 1970.

Download the Data

Data for Tototlan standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tototlan 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 2026-10-16 (16 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).