Otumba Weather Records (MXN00015065)

Record envelope, standing records and threshold days for Otumba (MXN00015065), Mexico, with 49 years of record.

Key Facts for Otumba

Otumba (MXN00015065) is a weather station in Mexico at 19.70 latitude and -98.75 longitude, 2,349 m (7,706 ft) above sea level.
The station reports from 1961 to 2009, 49 years of record.
1,464 records set at Otumba still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Otumba set a daily record precipitation of 29.5 mm (1.2 in) on 29 June 2009.

About the Station

Location: Mexico, 19.70 latitude, -98.75 longitude.
Elevation: 2,349 m (7,706 ft).
Period of record: 1961 to 2009, 49 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 Otumba. 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 Otumba, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	-11.1 C (12.0 F)	n/a	n/a
Feb	30.6 C (87.1 F)	-8.3 C (17.1 F)	n/a	n/a
Mar	32.8 C (91.0 F)	-6.1 C (21.0 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-1.1 C (30.0 F)	n/a	n/a
May	36.7 C (98.1 F)	0.6 C (33.1 F)	n/a	n/a
Jun	33.9 C (93.0 F)	0.6 C (33.1 F)	n/a	n/a
Jul	30.6 C (87.1 F)	2.8 C (37.0 F)	n/a	n/a
Aug	30.6 C (87.1 F)	0.6 C (33.1 F)	n/a	n/a
Sep	30.6 C (87.1 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	30.6 C (87.1 F)	-7.2 C (19.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-7.2 C (19.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Otumba still stand. 1983 holds the most, with 128.

Standing records at Otumba by the year they were set
Year set	Standing records
1970	29
1977	77
1978	81
1979	98
1980	107
1981	75
1982	108
1983	128
1984	58
1985	48
1986	100
1987	123
1988	92
1996	64
1997	53
1998	48
1999	35
2000	37
2005	12
2006	22
2007	25
2008	25
2009	19

Wettest Day of Each Month

Aug: 115.8 mm (4.6 in)

The wettest day on record for each calendar month at Otumba. The most was 115.8 mm (4.6 in) on 29 August 1965.

Record daily precipitation for each month at Otumba
Month	Record daily precipitation (mm)	Date
Jan	25.4 mm (1.0 in)	10 January 1967
Feb	19.1 mm (0.8 in)	17 February 1976
Mar	63.8 mm (2.5 in)	9 March 1966
Apr	45.0 mm (1.8 in)	13 April 1962
May	41.9 mm (1.6 in)	29 May 1975
Jun	53.3 mm (2.1 in)	21 June 1968
Jul	49.8 mm (2.0 in)	27 July 2008
Aug	115.8 mm (4.6 in)	29 August 1965
Sep	63.0 mm (2.5 in)	3 September 1967
Oct	51.3 mm (2.0 in)	10 October 1981
Nov	27.4 mm (1.1 in)	26 November 2000
Dec	31.5 mm (1.2 in)	1 December 1976

Period of Record Coverage

1970 to 2009

23 years of record at Otumba, 1970 to 2009. 6 years have data for under 90 percent of days and are left out of rankings: 1970, 1977, 1988, 1996, 2006, 2009.

Days with data per year at Otumba
Year	Days with data	Share of year	Complete
1970	30	8%	No
1977	245	67%	No
1978	363	99%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	364	100%	Yes
1986	365	100%	Yes
1987	360	99%	Yes
1988	303	83%	No
1996	111	30%	No
1997	365	100%	Yes
1998	335	92%	Yes
1999	335	92%	Yes
2000	366	100%	Yes
2005	365	100%	Yes
2006	321	88%	No
2007	365	100%	Yes
2008	366	100%	Yes
2009	181	50%	No

Latest Records

Latest records at Otumba
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 June 2009	Otumba, MX	daily rain	29.5 mm (1.2 in)	11.7 mm (0.5 in)	35 years	30 of 100 (Routine)
16 January 2009	Otumba, MX	daily rain (Tie)	2.8 mm (0.11 in)	tie	41 years	4 of 100 (Routine)
15 September 2008	Otumba, MX	daily rain	7.9 mm (0.31 in)	0.3 mm (0.01 in)	44 years	17 of 100 (Routine)
13 September 2008	Otumba, MX	daily rain	20.1 mm (0.8 in)	5.1 mm (0.20 in)	37 years	20 of 100 (Routine)
9 September 2008	Otumba, MX	daily rain	15.7 mm (0.6 in)	1.7 mm (0.07 in)	38 years	17 of 100 (Routine)
27 July 2008	Otumba, MX	monthly rain	49.8 mm (2.0 in)	8.9 mm (0.35 in)	24 years	33 of 100 (Routine)
6 July 2008	Otumba, MX	daily rain	15.0 mm (0.6 in)	4.1 mm (0.16 in)	39 years	20 of 100 (Routine)
11 June 2008	Otumba, MX	daily rain	13.0 mm (0.5 in)	4.1 mm (0.16 in)	38 years	20 of 100 (Routine)
7 June 2008	Otumba, MX	daily rain	11.9 mm (0.5 in)	3.0 mm (0.12 in)	38 years	19 of 100 (Routine)
24 December 2007	Otumba, MX	daily rain	9.9 mm (0.39 in)	9.9 mm (0.39 in)	45 years	20 of 100 (Routine)
13 December 2007	Otumba, MX	daily rain	9.9 mm (0.39 in)	9.9 mm (0.39 in)	45 years	20 of 100 (Routine)
12 December 2007	Otumba, MX	daily rain	9.9 mm (0.39 in)	2.5 mm (0.10 in)	34 years	18 of 100 (Routine)
6 December 2007	Otumba, MX	daily rain	8.9 mm (0.35 in)	8.9 mm (0.35 in)	45 years	20 of 100 (Routine)
5 December 2007	Otumba, MX	daily rain	7.9 mm (0.31 in)	4.6 mm (0.18 in)	42 years	20 of 100 (Routine)
29 November 2007	Otumba, MX	daily rain	2.8 mm (0.11 in)	2.8 mm (0.11 in)	45 years	20 of 100 (Routine)
22 November 2007	Otumba, MX	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	45 years	18 of 100 (Routine)
18 November 2007	Otumba, MX	daily rain	15.0 mm (0.6 in)	15.0 mm (0.6 in)	45 years	20 of 100 (Routine)
21 October 2007	Otumba, MX	daily rain	13.0 mm (0.5 in)	2.1 mm (0.08 in)	26 years	14 of 100 (Routine)
18 October 2007	Otumba, MX	daily rain	8.9 mm (0.35 in)	4.1 mm (0.16 in)	40 years	20 of 100 (Routine)
29 September 2007	Otumba, MX	daily rain	17.8 mm (0.7 in)	6.6 mm (0.26 in)	44 years	20 of 100 (Routine)

Climate Trend

15 complete years, 1978 to 2008

One stripe for each of 15 complete years at Otumba, 1978 to 2008. Blue stripes are years cooler than the station's own mean of 14.7 C (58.5 F); red stripes are warmer. The coolest year was 1987, at 13.3 C (55.9 F), and the warmest was 1982, at 15.8 C (60.4 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Otumba as warming stripes, 1978 to 2008
Year	Annual mean temperature	Difference from the station mean
1978	15.0 C	+0.24 C
1979	15.1 C	+0.40 C
1980	15.2 C	+0.49 C
1981	15.0 C	+0.26 C
1982	15.8 C	+1.02 C
1983	15.6 C	+0.83 C
1984	14.6 C	-0.14 C
1985	14.2 C	-0.52 C
1986	14.3 C	-0.45 C
1987	13.3 C	-1.45 C
1997	14.6 C	-0.11 C
2000	14.7 C	-0.09 C
2005	14.8 C	+0.01 C
2007	14.1 C	-0.60 C
2008	14.9 C	+0.18 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

1961 to 2009

Yearly extremes at Otumba: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1983	32.8 C (91.0 F)	23
Coldest night (TNn)	-11.1 C (12.0 F)	1988	-5.0 C (23.0 F)	23
Wettest day (Rx1day)	115.8 mm (4.6 in)	1965	35.8 mm (1.4 in)	38
Wettest five days (Rx5day)	202.9 mm (8.0 in)	1965	70.8 mm (2.8 in)	38
Longest dry spell (CDD)	124 days	2008	54 days	38

Hottest day (TXx)

The hottest day of the year at Otumba, 1961 to 2009. The record is 36.7 C (98.1 F) in 1983, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at Otumba by year
Year	Hottest day (TXx)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	30.6 C (87.1 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	31.7 C (89.1 F)
1978	35.0 C (95.0 F)
1979	32.8 C (91.0 F)
1980	33.9 C (93.0 F)
1981	32.8 C (91.0 F)
1982	33.9 C (93.0 F)
1983	36.7 C (98.1 F)
1984	35.6 C (96.1 F)
1985	32.8 C (91.0 F)
1986	35.0 C (95.0 F)
1987	32.8 C (91.0 F)
1988	35.0 C (95.0 F)
1996	28.9 C (84.0 F)
1997	35.0 C (95.0 F)
1998	35.6 C (96.1 F)
1999	30.6 C (87.1 F)
2000	31.7 C (89.1 F)
2005	32.8 C (91.0 F)
2006	31.7 C (89.1 F)
2007	30.6 C (87.1 F)
2008	33.9 C (93.0 F)
2009	33.9 C (93.0 F)

Coldest night (TNn)

The coldest night of the year at Otumba, 1961 to 2009. The record is -11.1 C (12.0 F) in 1988, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at Otumba by year
Year	Coldest night (TNn)
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	7.8 C (46.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	-3.3 C (26.1 F)
1978	-4.4 C (24.1 F)
1979	-5.0 C (23.0 F)
1980	-8.3 C (17.1 F)
1981	-6.1 C (21.0 F)
1982	-7.2 C (19.0 F)
1983	-5.0 C (23.0 F)
1984	-5.0 C (23.0 F)
1985	-5.0 C (23.0 F)
1986	-10.0 C (14.0 F)
1987	-8.3 C (17.1 F)
1988	-11.1 C (12.0 F)
1996	-3.3 C (26.1 F)
1997	-6.1 C (21.0 F)
1998	-3.3 C (26.1 F)
1999	-6.1 C (21.0 F)
2000	-3.3 C (26.1 F)
2005	-2.2 C (28.0 F)
2006	-7.2 C (19.0 F)
2007	-4.4 C (24.1 F)
2008	-5.0 C (23.0 F)
2009	-5.0 C (23.0 F)

Wettest day (Rx1day)

The wettest day of the year at Otumba, 1961 to 2009. The record is 115.8 mm (4.6 in) in 1965, marked on the chart; the median year is 35.8 mm (1.4 in).

Wettest day (Rx1day) at Otumba by year
Year	Wettest day (Rx1day)
1961	51.8 mm (2.0 in)
1962	45.0 mm (1.8 in)
1963	29.0 mm (1.1 in)
1964	29.7 mm (1.2 in)
1965	115.8 mm (4.6 in)
1966	63.8 mm (2.5 in)
1967	63.0 mm (2.5 in)
1968	53.3 mm (2.1 in)
1969	41.9 mm (1.6 in)
1970	22.9 mm (0.9 in)
1971	20.8 mm (0.8 in)
1972	51.8 mm (2.0 in)
1973	23.9 mm (0.9 in)
1974	32.8 mm (1.3 in)
1975	41.9 mm (1.6 in)
1976	48.3 mm (1.9 in)
1977	35.8 mm (1.4 in)
1978	21.1 mm (0.8 in)
1979	31.8 mm (1.3 in)
1980	36.8 mm (1.4 in)
1981	51.3 mm (2.0 in)
1982	25.9 mm (1.0 in)
1983	32.8 mm (1.3 in)
1984	40.9 mm (1.6 in)
1985	30.0 mm (1.2 in)
1986	29.5 mm (1.2 in)
1987	31.8 mm (1.3 in)
1988	26.9 mm (1.1 in)
1996	19.8 mm (0.8 in)
1997	35.8 mm (1.4 in)
1998	28.4 mm (1.1 in)
1999	39.9 mm (1.6 in)
2000	37.3 mm (1.5 in)
2005	36.8 mm (1.4 in)
2006	30.0 mm (1.2 in)
2007	41.9 mm (1.6 in)
2008	49.8 mm (2.0 in)
2009	29.5 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Otumba, 1961 to 2009. The record is 202.9 mm (8.0 in) in 1965, marked on the chart; the median year is 70.8 mm (2.8 in).

Wettest five days (Rx5day) at Otumba by year
Year	Wettest five days (Rx5day)
1961	82.6 mm (3.3 in)
1962	100.6 mm (4.0 in)
1963	53.4 mm (2.1 in)
1964	60.7 mm (2.4 in)
1965	202.9 mm (8.0 in)
1966	76.0 mm (3.0 in)
1967	126.3 mm (5.0 in)
1968	117.9 mm (4.6 in)
1969	76.0 mm (3.0 in)
1970	53.3 mm (2.1 in)
1971	42.8 mm (1.7 in)
1972	72.4 mm (2.9 in)
1973	70.6 mm (2.8 in)
1974	93.1 mm (3.7 in)
1975	56.6 mm (2.2 in)
1976	86.1 mm (3.4 in)
1977	70.9 mm (2.8 in)
1978	52.1 mm (2.1 in)
1979	64.2 mm (2.5 in)
1980	52.8 mm (2.1 in)
1981	53.5 mm (2.1 in)
1982	38.6 mm (1.5 in)
1983	91.5 mm (3.6 in)
1984	77.1 mm (3.0 in)
1985	61.8 mm (2.4 in)
1986	47.2 mm (1.9 in)
1987	56.7 mm (2.2 in)
1988	59.9 mm (2.4 in)
1996	43.2 mm (1.7 in)
1997	81.9 mm (3.2 in)
1998	93.2 mm (3.7 in)
1999	64.8 mm (2.6 in)
2000	54.3 mm (2.1 in)
2005	75.5 mm (3.0 in)
2006	82.3 mm (3.2 in)
2007	70.9 mm (2.8 in)
2008	76.7 mm (3.0 in)
2009	32.3 mm (1.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Otumba, 1961 to 2009. The record is 124 days in 2008, marked on the chart; the median year is 54 days.

Longest dry spell (CDD) at Otumba by year
Year	Longest dry spell (CDD)
1961	48 days
1962	101 days
1963	76 days
1964	39 days
1965	50 days
1966	44 days
1967	53 days
1968	47 days
1969	62 days
1970	64 days
1971	78 days
1972	37 days
1973	57 days
1974	70 days
1975	106 days
1976	32 days
1977	49 days
1978	43 days
1979	40 days
1980	36 days
1981	37 days
1982	56 days
1983	55 days
1984	43 days
1985	40 days
1986	95 days
1987	50 days
1988	83 days
1996	50 days
1997	70 days
1998	71 days
1999	41 days
2000	55 days
2005	54 days
2006	83 days
2007	31 days
2008	124 days
2009	104 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

34 years, 1961 to 2008

A day with at least 35.4 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 105.1 mm (4.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Otumba: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	35.4 mm (1.4 in)
5 years	48.3 mm (1.9 in)
10 years	58.7 mm (2.3 in)
25 years	74.6 mm (2.9 in)
50 years	88.8 mm (3.5 in)	Longer than the 34 years of record
100 years	105.1 mm (4.1 in)	Longer than the 34 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, 34 years of values from 1961 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: 115.8 mm (4.6 in) in 1965; 63.8 mm (2.5 in) in 1966; 63.0 mm (2.5 in) in 1967.

Download the Data

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