Planta Ramos Millan Weather Records (MXN00011056)

Record envelope, standing records and threshold days for Planta Ramos Millan (MXN00011056), Mexico, with 44 years of record.

Key Facts for Planta Ramos Millan

Planta Ramos Millan (MXN00011056) is a weather station in Mexico at 20.50 latitude and -100.95 longitude, 1,755 m (5,757 ft) above sea level.
The station reports from 1969 to 2012, 44 years of record.
1,464 records set at Planta Ramos Millan still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Planta Ramos Millan tied a daily record high minimum temperature of 12.8 C (55.0 F) on 6 November 2012.

About the Station

Location: Mexico, 20.50 latitude, -100.95 longitude.
Elevation: 1,755 m (5,757 ft).
Period of record: 1969 to 2012, 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 Planta Ramos Millan. 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 Planta Ramos Millan, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	-1.7 C (28.9 F)	n/a	n/a
Feb	32.8 C (91.0 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	38.9 C (102.0 F)	1.1 C (34.0 F)	n/a	n/a
Apr	37.8 C (100.0 F)	4.4 C (39.9 F)	n/a	n/a
May	40.0 C (104.0 F)	5.6 C (42.1 F)	n/a	n/a
Jun	38.9 C (102.0 F)	8.3 C (46.9 F)	n/a	n/a
Jul	36.7 C (98.1 F)	10.0 C (50.0 F)	n/a	n/a
Aug	35.0 C (95.0 F)	8.3 C (46.9 F)	n/a	n/a
Sep	35.0 C (95.0 F)	4.4 C (39.9 F)	n/a	n/a
Oct	35.6 C (96.1 F)	2.8 C (37.0 F)	n/a	n/a
Nov	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Dec	37.8 C (100.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Planta Ramos Millan still stand. 1977 holds the most, with 131.

Standing records at Planta Ramos Millan by the year they were set
Year set	Standing records
1969	35
1970	23
1971	40
1972	39
1973	43
1974	48
1975	57
1976	80
1977	131
1978	28
1979	72
1980	72
1981	33
1982	31
1983	47
1984	26
1985	32
1986	21
1987	25
1988	17
1989	32
1990	18
1994	22
1995	55
1996	29
1997	46
1998	40
1999	28
2000	17
2001	18
2002	30
2003	34
2004	36
2005	63
2006	40
2010	2
2011	35
2012	19

Wettest Day of Each Month

May: 97.8 mm (3.9 in)

The wettest day on record for each calendar month at Planta Ramos Millan. The most was 97.8 mm (3.9 in) on 16 May 1999.

Record daily precipitation for each month at Planta Ramos Millan
Month	Record daily precipitation (mm)	Date
Jan	31.8 mm (1.3 in)	24 January 1980
Feb	21.3 mm (0.8 in)	11 February 2002
Mar	19.8 mm (0.8 in)	9 March 1990
Apr	39.9 mm (1.6 in)	14 April 1981
May	97.8 mm (3.9 in)	16 May 1999
Jun	86.4 mm (3.4 in)	2 June 1986
Jul	78.0 mm (3.1 in)	5 July 1976
Aug	75.9 mm (3.0 in)	16 August 1973
Sep	95.0 mm (3.7 in)	16 September 1998
Oct	69.9 mm (2.8 in)	8 October 1982
Nov	91.9 mm (3.6 in)	27 November 2000
Dec	26.4 mm (1.0 in)	3 December 1979

Period of Record Coverage

1969 to 2012

38 years of record at Planta Ramos Millan, 1969 to 2012. 7 years have data for under 90 percent of days and are left out of rankings: 1970, 1982, 1987, 1989, 1994, 1996, 2010.

Days with data per year at Planta Ramos Millan
Year	Days with data	Share of year	Complete
1969	364	100%	Yes
1970	304	83%	No
1971	364	100%	Yes
1972	365	100%	Yes
1973	363	99%	Yes
1974	362	99%	Yes
1975	354	97%	Yes
1976	347	95%	Yes
1977	344	94%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	360	98%	Yes
1981	347	95%	Yes
1982	275	75%	No
1983	335	92%	Yes
1984	365	100%	Yes
1985	365	100%	Yes
1986	337	92%	Yes
1987	304	83%	No
1988	364	99%	Yes
1989	303	83%	No
1990	364	100%	Yes
1994	214	59%	No
1995	363	99%	Yes
1996	321	88%	No
1997	365	100%	Yes
1998	360	99%	Yes
1999	363	99%	Yes
2000	365	100%	Yes
2001	364	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	333	91%	Yes
2010	31	8%	No
2011	334	92%	Yes
2012	335	92%	Yes

Latest Records

Latest records at Planta Ramos Millan
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
6 November 2012	Planta Ramos Millan, MX	daily high min (Tie)	12.8 C (55.0 F)	tie	38 years	3 of 100 (Routine)
4 November 2012	Planta Ramos Millan, MX	daily rain	7.9 mm (0.31 in)	3.3 mm (0.13 in)	10 years	9 of 100 (Routine)
23 October 2012	Planta Ramos Millan, MX	daily high min	15.0 C (59.0 F)	1.1 C (2.0 F)	40 years	20 of 100 (Routine)
19 October 2012	Planta Ramos Millan, MX	daily high max	31.7 C (89.1 F)	0.6 C (1.1 F)	8 years	8 of 100 (Routine)
15 October 2012	Planta Ramos Millan, MX	daily high max	30.6 C (87.1 F)	0.6 C (1.1 F)	8 years	8 of 100 (Routine)
1 October 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	32 years	3 of 100 (Routine)
30 September 2012	Planta Ramos Millan, MX	daily rain	24.1 mm (0.9 in)	2.5 mm (0.10 in)	36 years	15 of 100 (Routine)
28 September 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	32 years	3 of 100 (Routine)
2 September 2012	Planta Ramos Millan, MX	daily high max (Tie)	30.0 C (86.0 F)	tie	17 years	2 of 100 (Routine)
26 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	39 years	3 of 100 (Routine)
25 August 2012	Planta Ramos Millan, MX	monthly high min (Tie)	17.8 C (64.0 F)	tie	17 years	4 of 100 (Routine)
20 August 2012	Planta Ramos Millan, MX	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	32 years	21 of 100 (Routine)
19 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	32 years	3 of 100 (Routine)
14 August 2012	Planta Ramos Millan, MX	daily high min	16.7 C (62.1 F)	1.1 C (2.0 F)	37 years	23 of 100 (Routine)
13 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	35 years	3 of 100 (Routine)
8 August 2012	Planta Ramos Millan, MX	daily high max (Tie)	30.6 C (87.1 F)	tie	16 years	2 of 100 (Routine)
7 August 2012	Planta Ramos Millan, MX	daily high max (Tie)	30.6 C (87.1 F)	tie	8 years	1 of 100 (Routine)
6 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	37 years	3 of 100 (Routine)
4 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	43 years	4 of 100 (Routine)
3 August 2012	Planta Ramos Millan, MX	daily high min (Tie)	15.6 C (60.1 F)	tie	43 years	4 of 100 (Routine)

Climate Trend

24 complete years, 1969 to 2005

One stripe for each of 24 complete years at Planta Ramos Millan, 1969 to 2005. Blue stripes are years cooler than the station's own mean of 18.9 C (66.0 F); red stripes are warmer. The coolest year was 1977, at 16.9 C (62.3 F), and the warmest was 2005, at 20.4 C (68.8 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Planta Ramos Millan as warming stripes, 1969 to 2005
Year	Annual mean temperature	Difference from the station mean
1969	19.1 C	+0.28 C
1971	18.6 C	-0.31 C
1972	18.9 C	+0.03 C
1973	18.5 C	-0.33 C
1974	18.2 C	-0.71 C
1975	17.5 C	-1.39 C
1977	16.9 C	-2.01 C
1978	18.5 C	-0.39 C
1979	17.8 C	-1.07 C
1980	18.0 C	-0.84 C
1984	18.7 C	-0.16 C
1985	18.8 C	-0.10 C
1988	19.0 C	+0.13 C
1990	19.2 C	+0.33 C
1995	19.6 C	+0.77 C
1997	19.2 C	+0.31 C
1998	19.6 C	+0.78 C
1999	19.1 C	+0.22 C
2000	19.4 C	+0.55 C
2001	19.3 C	+0.48 C
2002	19.4 C	+0.51 C
2003	19.6 C	+0.72 C
2004	19.6 C	+0.70 C
2005	20.4 C	+1.56 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

1969 to 2012

Yearly extremes at Planta Ramos Millan: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1978	35.6 C (96.1 F)	38
Coldest night (TNn)	-5.0 C (23.0 F)	1997	0.6 C (33.1 F)	38
Wettest day (Rx1day)	97.8 mm (3.9 in)	1999	54.9 mm (2.2 in)	38
Wettest five days (Rx5day)	207.2 mm (8.2 in)	1983	100.9 mm (4.0 in)	38
Longest dry spell (CDD)	140 days	1998	69 days	38

Hottest day (TXx)

The hottest day of the year at Planta Ramos Millan, 1969 to 2012. The record is 40.0 C (104.0 F) in 1978, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Planta Ramos Millan by year
Year	Hottest day (TXx)
1969	35.0 C (95.0 F)
1970	33.9 C (93.0 F)
1971	33.9 C (93.0 F)
1972	35.0 C (95.0 F)
1973	36.7 C (98.1 F)
1974	37.8 C (100.0 F)
1975	39.4 C (102.9 F)
1976	35.0 C (95.0 F)
1977	38.9 C (102.0 F)
1978	40.0 C (104.0 F)
1979	37.8 C (100.0 F)
1980	37.8 C (100.0 F)
1981	32.8 C (91.0 F)
1982	35.0 C (95.0 F)
1983	35.6 C (96.1 F)
1984	37.8 C (100.0 F)
1985	33.9 C (93.0 F)
1986	35.0 C (95.0 F)
1987	35.0 C (95.0 F)
1988	35.0 C (95.0 F)
1989	35.6 C (96.1 F)
1990	36.7 C (98.1 F)
1994	37.8 C (100.0 F)
1995	35.0 C (95.0 F)
1996	35.6 C (96.1 F)
1997	35.0 C (95.0 F)
1998	37.2 C (99.0 F)
1999	35.6 C (96.1 F)
2000	34.4 C (93.9 F)
2001	35.0 C (95.0 F)
2002	35.6 C (96.1 F)
2003	36.7 C (98.1 F)
2004	36.7 C (98.1 F)
2005	38.9 C (102.0 F)
2006	35.6 C (96.1 F)
2010	27.8 C (82.0 F)
2011	35.0 C (95.0 F)
2012	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Planta Ramos Millan, 1969 to 2012. The record is -5.0 C (23.0 F) in 1997, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Planta Ramos Millan by year
Year	Coldest night (TNn)
1969	0.0 C (32.0 F)
1970	0.0 C (32.0 F)
1971	1.7 C (35.1 F)
1972	-0.6 C (30.9 F)
1973	-0.6 C (30.9 F)
1974	1.1 C (34.0 F)
1975	-0.6 C (30.9 F)
1976	-1.1 C (30.0 F)
1977	1.7 C (35.1 F)
1978	1.1 C (34.0 F)
1979	0.0 C (32.0 F)
1980	1.1 C (34.0 F)
1981	1.7 C (35.1 F)
1982	-3.3 C (26.1 F)
1983	0.6 C (33.1 F)
1984	2.8 C (37.0 F)
1985	1.7 C (35.1 F)
1986	0.6 C (33.1 F)
1987	0.6 C (33.1 F)
1988	-1.7 C (28.9 F)
1989	-0.6 C (30.9 F)
1990	1.7 C (35.1 F)
1994	3.9 C (39.0 F)
1995	1.7 C (35.1 F)
1996	1.1 C (34.0 F)
1997	-5.0 C (23.0 F)
1998	-5.0 C (23.0 F)
1999	0.0 C (32.0 F)
2000	1.7 C (35.1 F)
2001	2.8 C (37.0 F)
2002	0.0 C (32.0 F)
2003	0.0 C (32.0 F)
2004	0.0 C (32.0 F)
2005	2.8 C (37.0 F)
2006	0.6 C (33.1 F)
2010	0.0 C (32.0 F)
2011	2.8 C (37.0 F)
2012	5.0 C (41.0 F)

Wettest day (Rx1day)

The wettest day of the year at Planta Ramos Millan, 1969 to 2012. The record is 97.8 mm (3.9 in) in 1999, marked on the chart; the median year is 54.9 mm (2.2 in).

Wettest day (Rx1day) at Planta Ramos Millan by year
Year	Wettest day (Rx1day)
1969	30.0 mm (1.2 in)
1970	39.1 mm (1.5 in)
1971	50.8 mm (2.0 in)
1972	55.9 mm (2.2 in)
1973	75.9 mm (3.0 in)
1974	66.3 mm (2.6 in)
1975	63.8 mm (2.5 in)
1976	78.0 mm (3.1 in)
1977	34.3 mm (1.4 in)
1978	58.4 mm (2.3 in)
1979	59.9 mm (2.4 in)
1980	42.4 mm (1.7 in)
1981	46.5 mm (1.8 in)
1982	69.9 mm (2.8 in)
1983	68.3 mm (2.7 in)
1984	57.7 mm (2.3 in)
1985	41.9 mm (1.6 in)
1986	86.4 mm (3.4 in)
1987	25.7 mm (1.0 in)
1988	46.0 mm (1.8 in)
1989	49.8 mm (2.0 in)
1990	47.8 mm (1.9 in)
1994	37.3 mm (1.5 in)
1995	49.8 mm (2.0 in)
1996	70.4 mm (2.8 in)
1997	38.1 mm (1.5 in)
1998	95.0 mm (3.7 in)
1999	97.8 mm (3.9 in)
2000	91.9 mm (3.6 in)
2001	78.0 mm (3.1 in)
2002	68.8 mm (2.7 in)
2003	79.8 mm (3.1 in)
2004	53.8 mm (2.1 in)
2005	41.9 mm (1.6 in)
2006	48.8 mm (1.9 in)
2010	0.0 mm (0.00 in)
2011	59.9 mm (2.4 in)
2012	49.3 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Planta Ramos Millan, 1969 to 2012. The record is 207.2 mm (8.2 in) in 1983, marked on the chart; the median year is 100.9 mm (4.0 in).

Wettest five days (Rx5day) at Planta Ramos Millan by year
Year	Wettest five days (Rx5day)
1969	49.9 mm (2.0 in)
1970	70.4 mm (2.8 in)
1971	113.3 mm (4.5 in)
1972	87.4 mm (3.4 in)
1973	146.3 mm (5.8 in)
1974	90.7 mm (3.6 in)
1975	149.2 mm (5.9 in)
1976	127.8 mm (5.0 in)
1977	50.1 mm (2.0 in)
1978	118.4 mm (4.7 in)
1979	130.8 mm (5.1 in)
1980	101.3 mm (4.0 in)
1981	64.5 mm (2.5 in)
1982	82.1 mm (3.2 in)
1983	207.2 mm (8.2 in)
1984	73.1 mm (2.9 in)
1985	90.7 mm (3.6 in)
1986	134.8 mm (5.3 in)
1987	45.0 mm (1.8 in)
1988	88.8 mm (3.5 in)
1989	80.8 mm (3.2 in)
1990	77.8 mm (3.1 in)
1994	86.9 mm (3.4 in)
1995	155.2 mm (6.1 in)
1996	105.4 mm (4.1 in)
1997	55.2 mm (2.2 in)
1998	193.4 mm (7.6 in)
1999	156.7 mm (6.2 in)
2000	151.4 mm (6.0 in)
2001	127.2 mm (5.0 in)
2002	120.2 mm (4.7 in)
2003	165.7 mm (6.5 in)
2004	100.5 mm (4.0 in)
2005	84.9 mm (3.3 in)
2006	103.4 mm (4.1 in)
2010	0.0 mm (0.00 in)
2011	90.7 mm (3.6 in)
2012	140.6 mm (5.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Planta Ramos Millan, 1969 to 2012. The record is 140 days in 1998, marked on the chart; the median year is 69 days.

Longest dry spell (CDD) at Planta Ramos Millan by year
Year	Longest dry spell (CDD)
1969	71 days
1970	57 days
1971	65 days
1972	59 days
1973	62 days
1974	35 days
1975	109 days
1976	59 days
1977	102 days
1978	62 days
1979	81 days
1980	63 days
1981	40 days
1982	45 days
1983	73 days
1984	74 days
1985	97 days
1986	47 days
1987	50 days
1988	103 days
1989	113 days
1990	67 days
1994	79 days
1995	139 days
1996	115 days
1997	53 days
1998	140 days
1999	135 days
2000	64 days
2001	70 days
2002	56 days
2003	116 days
2004	65 days
2005	85 days
2006	56 days
2010	31 days
2011	92 days
2012	81 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

31 years, 1969 to 2012

A day with at least 57.5 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 115.9 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Planta Ramos Millan: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	57.5 mm (2.3 in)
5 years	74.5 mm (2.9 in)
10 years	85.2 mm (3.4 in)
25 years	98.1 mm (3.9 in)
50 years	107.2 mm (4.2 in)	Longer than the 31 years of record
100 years	115.9 mm (4.6 in)	Longer than the 31 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, 31 years of values from 1969 to 2012.

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: 97.8 mm (3.9 in) in 1999; 95.0 mm (3.7 in) in 1998; 91.9 mm (3.6 in) in 2000.

Download the Data

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