El Derrame Weather Records (MXN00010020)

Record envelope, standing records and threshold days for El Derrame (MXN00010020), Mexico, with 44 years of record.

Key Facts for El Derrame

El Derrame (MXN00010020) is a weather station in Mexico at 26.22 latitude and -104.48 longitude, 1,300 m (4,265 ft) above sea level.
The station reports from 1966 to 2009, 44 years of record.
1,464 records set at El Derrame still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
El Derrame tied a daily record high minimum temperature of 21.7 C (71.1 F) on 26 July 2009.

About the Station

Location: Mexico, 26.22 latitude, -104.48 longitude.
Elevation: 1,300 m (4,265 ft).
Period of record: 1966 to 2009, 44 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 El Derrame. 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 El Derrame, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-10.0 C (14.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	-9.4 C (15.1 F)	n/a	n/a
Mar	38.9 C (102.0 F)	-8.3 C (17.1 F)	n/a	n/a
Apr	42.8 C (109.0 F)	-2.2 C (28.0 F)	n/a	n/a
May	43.9 C (111.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	45.0 C (113.0 F)	3.9 C (39.0 F)	n/a	n/a
Jul	41.7 C (107.1 F)	2.8 C (37.0 F)	n/a	n/a
Aug	40.6 C (105.1 F)	3.9 C (39.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	0.0 C (32.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	37.8 C (100.0 F)	-5.0 C (23.0 F)	n/a	n/a
Dec	32.8 C (91.0 F)	-13.3 C (8.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at El Derrame still stand. 2007 holds the most, with 126.

Standing records at El Derrame by the year they were set
Year set	Standing records
1966	4
1967	21
1968	20
1969	28
1970	33
1971	17
1972	17
1973	50
1974	36
1975	25
1976	17
1977	34
1978	14
1979	21
1980	39
1981	19
1982	50
1983	25
1984	23
1985	6
1986	17
1987	10
1988	14
1989	32
1990	60
1991	10
1992	11
1993	40
1994	17
1995	20
1996	22
1997	24
1998	61
1999	75
2000	48
2001	30
2002	49
2003	31
2004	36
2005	38
2006	91
2007	126
2008	76
2009	27

All-Time Record Progression

8 new records

8 all-time records were set at El Derrame between 1 June 1999 and 2 June 2008. Each dot is a new record.

When El Derrame set new all-time records
Date	Kind	Detail
1999-06-01	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)
1999-06-04	Record high minimum temperature	Record high minimum temperature 28.9 C (84.0 F)
1999-12-06	Record low maximum temperature	Record low maximum temperature 5.6 C (42.1 F)
1999-12-07	Record low maximum temperature	Record low maximum temperature 3.9 C (39.0 F)
1999-12-16	Record low maximum temperature	Record low maximum temperature 2.8 C (37.0 F)
2002-06-05	Record daily precipitation	Record daily precipitation 85.9 mm (3.4 in)
2006-01-07	Record low maximum temperature	Record low maximum temperature 1.7 C (35.1 F)
2008-06-02	Record high maximum temperature	Record high maximum temperature 45.0 C (113.0 F)

Wettest Day of Each Month

Jun: 85.9 mm (3.4 in)

The wettest day on record for each calendar month at El Derrame. The most was 85.9 mm (3.4 in) on 5 June 2002.

Record daily precipitation for each month at El Derrame
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	31 January 1984
Feb	15.5 mm (0.6 in)	11 February 1980
Mar	51.3 mm (2.0 in)	21 March 2004
Apr	33.8 mm (1.3 in)	25 April 2001
May	42.9 mm (1.7 in)	10 May 2006
Jun	85.9 mm (3.4 in)	5 June 2002
Jul	75.4 mm (3.0 in)	28 July 2004
Aug	52.8 mm (2.1 in)	30 August 1978
Sep	79.8 mm (3.1 in)	26 September 1970
Oct	36.8 mm (1.4 in)	9 October 1971
Nov	16.8 mm (0.7 in)	22 November 1972
Dec	19.8 mm (0.8 in)	13 December 1984

Period of Record Coverage

1966 to 2009

44 years of record at El Derrame, 1966 to 2009. 11 years have data for under 90 percent of days and are left out of rankings: 1966, 1967, 1987, 1991, 1992, 1995, 1997, 2000 and others.

Days with data per year at El Derrame
Year	Days with data	Share of year	Complete
1966	201	55%	No
1967	326	89%	No
1968	337	92%	Yes
1969	362	99%	Yes
1970	364	100%	Yes
1971	364	100%	Yes
1972	365	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	346	95%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	365	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	335	92%	Yes
1987	243	67%	No
1988	345	94%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	118	32%	No
1992	245	67%	No
1993	365	100%	Yes
1994	364	100%	Yes
1995	304	83%	No
1996	332	91%	Yes
1997	306	84%	No
1998	365	100%	Yes
1999	363	99%	Yes
2000	228	62%	No
2001	334	92%	Yes
2002	357	98%	Yes
2003	348	95%	Yes
2004	365	100%	Yes
2005	344	94%	Yes
2006	130	36%	No
2007	182	50%	No
2008	357	98%	Yes
2009	208	57%	No

Latest Records

Latest records at El Derrame
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
26 July 2009	El Derrame, MX	daily high min (Tie)	21.7 C (71.1 F)	tie	40 years	4 of 100 (Routine)
24 July 2009	El Derrame, MX	daily high min (Tie)	20.6 C (69.1 F)	tie	40 years	4 of 100 (Routine)
24 July 2009	El Derrame, MX	daily high max (Tie)	36.7 C (98.1 F)	tie	30 years	3 of 100 (Routine)
23 July 2009	El Derrame, MX	daily high min	25.0 C (77.0 F)	4.4 C (7.9 F)	39 years	27 of 100 (Routine)
20 July 2009	El Derrame, MX	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	40 years	19 of 100 (Routine)
6 July 2009	El Derrame, MX	daily high max (Tie)	37.8 C (100.0 F)	tie	28 years	3 of 100 (Routine)
5 July 2009	El Derrame, MX	daily high max (Tie)	38.9 C (102.0 F)	tie	28 years	3 of 100 (Routine)
4 July 2009	El Derrame, MX	daily high max	38.9 C (102.0 F)	1.1 C (2.0 F)	15 years	10 of 100 (Routine)
30 June 2009	El Derrame, MX	daily high max	40.6 C (105.1 F)	0.6 C (1.1 F)	28 years	13 of 100 (Routine)
29 June 2009	El Derrame, MX	daily high max	40.0 C (104.0 F)	1.1 C (2.0 F)	36 years	17 of 100 (Routine)
25 June 2009	El Derrame, MX	monthly low max	15.6 C (60.1 F)	2.2 C (4.0 F)	36 years	29 of 100 (Routine)
17 May 2009	El Derrame, MX	daily high max	40.0 C (104.0 F)	1.1 C (2.0 F)	35 years	16 of 100 (Routine)
16 May 2009	El Derrame, MX	daily high max	40.0 C (104.0 F)	1.1 C (2.0 F)	14 years	10 of 100 (Routine)
15 May 2009	El Derrame, MX	daily high max	41.7 C (107.1 F)	2.8 C (5.0 F)	19 years	15 of 100 (Routine)
14 May 2009	El Derrame, MX	daily high max	41.7 C (107.1 F)	2.8 C (5.0 F)	28 years	18 of 100 (Routine)
12 May 2009	El Derrame, MX	daily high max (Tie)	42.8 C (109.0 F)	tie	0 years	1 of 100 (Routine)
11 May 2009	El Derrame, MX	daily high max	42.8 C (109.0 F)	1.1 C (2.0 F)	0 years	6 of 100 (Routine)
10 May 2009	El Derrame, MX	monthly high max (Tie)	43.9 C (111.0 F)	tie	0 years	3 of 100 (Routine)
9 May 2009	El Derrame, MX	monthly high max (Tie)	43.9 C (111.0 F)	tie	0 years	3 of 100 (Routine)
8 May 2009	El Derrame, MX	monthly high max	43.9 C (111.0 F)	1.1 C (2.0 F)	28 years	24 of 100 (Routine)

Climate Trend

25 complete years, 1969 to 2008

One stripe for each of 25 complete years at El Derrame, 1969 to 2008. Blue stripes are years cooler than the station's own mean of 18.9 C (66.1 F); red stripes are warmer. The coolest year was 2004, at 16.4 C (61.6 F), and the warmest was 1990, at 20.8 C (69.5 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at El Derrame as warming stripes, 1969 to 2008
Year	Annual mean temperature	Difference from the station mean
1969	19.2 C	+0.26 C
1970	18.2 C	-0.76 C
1971	18.9 C	-0.07 C
1972	18.5 C	-0.42 C
1973	17.2 C	-1.76 C
1974	19.5 C	+0.52 C
1975	19.1 C	+0.14 C
1976	17.4 C	-1.55 C
1978	18.4 C	-0.56 C
1979	17.2 C	-1.73 C
1980	20.4 C	+1.43 C
1981	19.3 C	+0.36 C
1982	20.3 C	+1.36 C
1983	19.9 C	+0.91 C
1984	19.7 C	+0.79 C
1985	19.9 C	+0.95 C
1989	20.4 C	+1.50 C
1990	20.8 C	+1.87 C
1993	17.3 C	-1.64 C
1994	19.0 C	+0.06 C
1998	20.4 C	+1.41 C
1999	19.4 C	+0.43 C
2002	16.7 C	-2.28 C
2004	16.4 C	-2.51 C
2008	20.3 C	+1.32 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 2009

Yearly extremes at El Derrame: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	2008	39.5 C (103.0 F)	44
Coldest night (TNn)	-13.3 C (8.1 F)	1983	-5.0 C (23.0 F)	44
Wettest day (Rx1day)	85.9 mm (3.4 in)	2002	37.8 mm (1.5 in)	44
Wettest five days (Rx5day)	107.4 mm (4.2 in)	1970	56.2 mm (2.2 in)	44
Longest dry spell (CDD)	164 days	1969	85 days	44

Hottest day (TXx)

The hottest day of the year at El Derrame, 1966 to 2009. The record is 45.0 C (113.0 F) in 2008, marked on the chart; the median year is 39.5 C (103.0 F).

Hottest day (TXx) at El Derrame by year
Year	Hottest day (TXx)
1966	41.1 C (106.0 F)
1967	37.8 C (100.0 F)
1968	37.8 C (100.0 F)
1969	38.9 C (102.0 F)
1970	38.9 C (102.0 F)
1971	36.7 C (98.1 F)
1972	40.6 C (105.1 F)
1973	40.0 C (104.0 F)
1974	40.0 C (104.0 F)
1975	40.0 C (104.0 F)
1976	37.8 C (100.0 F)
1977	37.8 C (100.0 F)
1978	38.9 C (102.0 F)
1979	38.9 C (102.0 F)
1980	42.8 C (109.0 F)
1981	40.6 C (105.1 F)
1982	41.7 C (107.1 F)
1983	40.6 C (105.1 F)
1984	40.6 C (105.1 F)
1985	40.0 C (104.0 F)
1986	37.8 C (100.0 F)
1987	40.6 C (105.1 F)
1988	38.9 C (102.0 F)
1989	40.0 C (104.0 F)
1990	40.6 C (105.1 F)
1991	37.8 C (100.0 F)
1992	38.9 C (102.0 F)
1993	37.8 C (100.0 F)
1994	38.9 C (102.0 F)
1995	40.0 C (104.0 F)
1996	41.7 C (107.1 F)
1997	37.8 C (100.0 F)
1998	41.7 C (107.1 F)
1999	40.6 C (105.1 F)
2000	40.0 C (104.0 F)
2001	40.0 C (104.0 F)
2002	33.9 C (93.0 F)
2003	32.8 C (91.0 F)
2004	35.0 C (95.0 F)
2005	32.8 C (91.0 F)
2006	31.7 C (89.1 F)
2007	32.8 C (91.0 F)
2008	45.0 C (113.0 F)
2009	43.9 C (111.0 F)

Coldest night (TNn)

The coldest night of the year at El Derrame, 1966 to 2009. The record is -13.3 C (8.1 F) in 1983, marked on the chart; the median year is -5.0 C (23.0 F).

Coldest night (TNn) at El Derrame by year
Year	Coldest night (TNn)
1966	-4.4 C (24.1 F)
1967	-5.0 C (23.0 F)
1968	-4.4 C (24.1 F)
1969	-5.0 C (23.0 F)
1970	-6.1 C (21.0 F)
1971	-10.0 C (14.0 F)
1972	-4.4 C (24.1 F)
1973	-8.3 C (17.1 F)
1974	-7.2 C (19.0 F)
1975	-9.4 C (15.1 F)
1976	-7.2 C (19.0 F)
1977	-5.0 C (23.0 F)
1978	-8.3 C (17.1 F)
1979	-8.3 C (17.1 F)
1980	-2.2 C (28.0 F)
1981	-3.3 C (26.1 F)
1982	-6.1 C (21.0 F)
1983	-13.3 C (8.1 F)
1984	-5.0 C (23.0 F)
1985	-6.1 C (21.0 F)
1986	-3.3 C (26.1 F)
1987	-5.0 C (23.0 F)
1988	-7.2 C (19.0 F)
1989	-6.1 C (21.0 F)
1990	0.6 C (33.1 F)
1991	-2.2 C (28.0 F)
1992	-4.4 C (24.1 F)
1993	0.0 C (32.0 F)
1994	-2.2 C (28.0 F)
1995	-6.1 C (21.0 F)
1996	-5.0 C (23.0 F)
1997	-10.0 C (14.0 F)
1998	-9.4 C (15.1 F)
1999	-6.1 C (21.0 F)
2000	-6.1 C (21.0 F)
2001	-6.1 C (21.0 F)
2002	-4.4 C (24.1 F)
2003	-5.0 C (23.0 F)
2004	-8.3 C (17.1 F)
2005	-2.2 C (28.0 F)
2006	-3.3 C (26.1 F)
2007	0.0 C (32.0 F)
2008	0.0 C (32.0 F)
2009	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at El Derrame, 1966 to 2009. The record is 85.9 mm (3.4 in) in 2002, marked on the chart; the median year is 37.8 mm (1.5 in).

Wettest day (Rx1day) at El Derrame by year
Year	Wettest day (Rx1day)
1966	34.8 mm (1.4 in)
1967	27.9 mm (1.1 in)
1968	38.9 mm (1.5 in)
1969	19.8 mm (0.8 in)
1970	79.8 mm (3.1 in)
1971	51.8 mm (2.0 in)
1972	36.8 mm (1.4 in)
1973	45.0 mm (1.8 in)
1974	26.9 mm (1.1 in)
1975	16.8 mm (0.7 in)
1976	41.9 mm (1.6 in)
1977	45.0 mm (1.8 in)
1978	52.8 mm (2.1 in)
1979	39.9 mm (1.6 in)
1980	46.0 mm (1.8 in)
1981	19.8 mm (0.8 in)
1982	33.8 mm (1.3 in)
1983	23.9 mm (0.9 in)
1984	50.8 mm (2.0 in)
1985	45.0 mm (1.8 in)
1986	41.9 mm (1.6 in)
1987	39.9 mm (1.6 in)
1988	39.9 mm (1.6 in)
1989	16.8 mm (0.7 in)
1990	55.9 mm (2.2 in)
1991	25.9 mm (1.0 in)
1992	18.8 mm (0.7 in)
1993	25.9 mm (1.0 in)
1994	15.5 mm (0.6 in)
1995	22.9 mm (0.9 in)
1996	20.8 mm (0.8 in)
1997	32.8 mm (1.3 in)
1998	29.0 mm (1.1 in)
1999	49.3 mm (1.9 in)
2000	31.0 mm (1.2 in)
2001	33.8 mm (1.3 in)
2002	85.9 mm (3.4 in)
2003	42.9 mm (1.7 in)
2004	75.4 mm (3.0 in)
2005	73.9 mm (2.9 in)
2006	42.9 mm (1.7 in)
2007	31.0 mm (1.2 in)
2008	51.8 mm (2.0 in)
2009	4.3 mm (0.17 in)

Wettest five days (Rx5day)

The wettest five days of the year at El Derrame, 1966 to 2009. The record is 107.4 mm (4.2 in) in 1970, marked on the chart; the median year is 56.2 mm (2.2 in).

Wettest five days (Rx5day) at El Derrame by year
Year	Wettest five days (Rx5day)
1966	64.6 mm (2.5 in)
1967	42.3 mm (1.7 in)
1968	71.9 mm (2.8 in)
1969	25.1 mm (1.0 in)
1970	107.4 mm (4.2 in)
1971	106.0 mm (4.2 in)
1972	56.6 mm (2.2 in)
1973	78.3 mm (3.1 in)
1974	32.7 mm (1.3 in)
1975	35.4 mm (1.4 in)
1976	59.7 mm (2.4 in)
1977	51.6 mm (2.0 in)
1978	82.6 mm (3.3 in)
1979	58.7 mm (2.3 in)
1980	70.9 mm (2.8 in)
1981	47.3 mm (1.9 in)
1982	54.6 mm (2.1 in)
1983	33.8 mm (1.3 in)
1984	82.5 mm (3.2 in)
1985	64.0 mm (2.5 in)
1986	79.2 mm (3.1 in)
1987	63.6 mm (2.5 in)
1988	55.7 mm (2.2 in)
1989	33.3 mm (1.3 in)
1990	87.7 mm (3.5 in)
1991	49.6 mm (2.0 in)
1992	18.8 mm (0.7 in)
1993	64.0 mm (2.5 in)
1994	27.4 mm (1.1 in)
1995	41.7 mm (1.6 in)
1996	43.4 mm (1.7 in)
1997	53.1 mm (2.1 in)
1998	34.1 mm (1.3 in)
1999	50.1 mm (2.0 in)
2000	38.1 mm (1.5 in)
2001	33.8 mm (1.3 in)
2002	102.4 mm (4.0 in)
2003	88.2 mm (3.5 in)
2004	97.8 mm (3.9 in)
2005	73.9 mm (2.9 in)
2006	83.6 mm (3.3 in)
2007	41.7 mm (1.6 in)
2008	100.0 mm (3.9 in)
2009	6.9 mm (0.27 in)

Longest dry spell (CDD)

The longest dry spell of the year at El Derrame, 1966 to 2009. The record is 164 days in 1969, marked on the chart; the median year is 85 days.

Longest dry spell (CDD) at El Derrame by year
Year	Longest dry spell (CDD)
1966	67 days
1967	62 days
1968	77 days
1969	164 days
1970	97 days
1971	131 days
1972	75 days
1973	80 days
1974	114 days
1975	146 days
1976	65 days
1977	94 days
1978	72 days
1979	59 days
1980	161 days
1981	41 days
1982	112 days
1983	123 days
1984	100 days
1985	60 days
1986	85 days
1987	104 days
1988	77 days
1989	146 days
1990	84 days
1991	53 days
1992	58 days
1993	104 days
1994	71 days
1995	151 days
1996	135 days
1997	63 days
1998	161 days
1999	86 days
2000	111 days
2001	53 days
2002	66 days
2003	44 days
2004	47 days
2005	112 days
2006	63 days
2007	44 days
2008	135 days
2009	139 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at El Derrame falls on 7 March and the median first autumn frost on 21 November, which leaves a median of 261 days between them.

Frost dates and growing season at El Derrame
Measure	Median, all years	Earliest period	Recent period (1969 to 2008)	Recent against earliest	Fitted trend
Last spring frost	7 March	n/a	7 March	n/a	n/a
First autumn frost	21 November	n/a	21 November	n/a	n/a
Growing days	261 days	n/a	261 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

35 years, 1967 to 2008

A day with at least 38.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 95.7 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at El Derrame: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.3 mm (1.5 in)
5 years	54.7 mm (2.2 in)
10 years	65.1 mm (2.6 in)
25 years	77.8 mm (3.1 in)
50 years	86.9 mm (3.4 in)	Longer than the 35 years of record
100 years	95.7 mm (3.8 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 1967 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: 85.9 mm (3.4 in) in 2002; 79.8 mm (3.1 in) in 1970; 75.4 mm (3.0 in) in 2004.

Download the Data

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