San Ignacio de Los Romero Weather Records (MXN00003105)

Record envelope, standing records and threshold days for San Ignacio de Los Romero (MXN00003105), Mexico, with 37 years of record.

Key Facts for San Ignacio de Los Romero

San Ignacio de Los Romero (MXN00003105) is a weather station in Mexico at 25.58 latitude and -111.63 longitude, 140 m (459 ft) above sea level.
The station reports from 1976 to 2012, 37 years of record.
1,464 records set at San Ignacio de Los Romero still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Ignacio de Los Romero set a daily record low maximum temperature of 21.7 C (71.1 F) on 20 November 2012.

About the Station

Location: Mexico, 25.58 latitude, -111.63 longitude.
Elevation: 140 m (459 ft).
Period of record: 1976 to 2012, 37 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 San Ignacio de Los Romero. 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 San Ignacio de Los Romero, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.6 C (96.1 F)	1.1 C (34.0 F)	n/a	n/a
Feb	40.0 C (104.0 F)	0.6 C (33.1 F)	n/a	n/a
Mar	40.6 C (105.1 F)	0.6 C (33.1 F)	n/a	n/a
Apr	43.9 C (111.0 F)	3.3 C (37.9 F)	n/a	n/a
May	42.2 C (108.0 F)	6.7 C (44.1 F)	n/a	n/a
Jun	45.0 C (113.0 F)	6.1 C (43.0 F)	n/a	n/a
Jul	43.3 C (109.9 F)	10.6 C (51.1 F)	n/a	n/a
Aug	45.0 C (113.0 F)	15.0 C (59.0 F)	n/a	n/a
Sep	45.0 C (113.0 F)	10.0 C (50.0 F)	n/a	n/a
Oct	42.8 C (109.0 F)	2.8 C (37.0 F)	n/a	n/a
Nov	41.1 C (106.0 F)	0.6 C (33.1 F)	n/a	n/a
Dec	35.6 C (96.1 F)	-2.2 C (28.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Ignacio de Los Romero still stand. 1982 holds the most, with 123.

Standing records at San Ignacio de Los Romero by the year they were set
Year set	Standing records
1976	3
1977	29
1978	47
1979	67
1980	84
1981	66
1982	123
1983	6
1984	35
1985	45
1986	42
1987	40
1988	37
1989	32
1990	32
1991	23
1992	28
1993	23
1994	18
1995	44
1996	20
1997	57
1998	25
1999	34
2000	29
2001	32
2002	30
2003	56
2004	40
2005	42
2006	40
2007	32
2008	36
2009	55
2010	38
2011	34
2012	40

All-Time Record Progression

1 new records

1 all-time records were set at San Ignacio de Los Romero between 16 February 2012 and 16 February 2012. Each dot is a new record.

Wettest Day of Each Month

Aug: 148.6 mm (5.9 in)

The wettest day on record for each calendar month at San Ignacio de Los Romero. The most was 148.6 mm (5.9 in) on 15 August 1997.

Record daily precipitation for each month at San Ignacio de Los Romero
Month	Record daily precipitation (mm)	Date
Jan	62.0 mm (2.4 in)	17 January 1979
Feb	34.0 mm (1.3 in)	1 February 1989
Mar	68.8 mm (2.7 in)	3 March 1983
Apr	11.9 mm (0.5 in)	30 April 1981
May	1.0 mm (0.04 in)	11 May 1993
Jun	15.0 mm (0.6 in)	1 June 1982
Jul	43.9 mm (1.7 in)	25 July 1978
Aug	148.6 mm (5.9 in)	15 August 1997
Sep	140.5 mm (5.5 in)	2 September 2009
Oct	69.6 mm (2.7 in)	15 October 2012
Nov	34.8 mm (1.4 in)	21 November 1983
Dec	58.9 mm (2.3 in)	10 December 1991

Period of Record Coverage

1976 to 2012

37 years of record at San Ignacio de Los Romero, 1976 to 2012. 11 years have data for under 90 percent of days and are left out of rankings: 1976, 1977, 1978, 1979, 1980, 1982, 1983, 1984 and others.

Days with data per year at San Ignacio de Los Romero
Year	Days with data	Share of year	Complete
1976	125	34%	No
1977	326	89%	No
1978	302	83%	No
1979	320	88%	No
1980	328	90%	No
1981	334	92%	Yes
1982	326	89%	No
1983	154	42%	No
1984	267	73%	No
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	355	97%	Yes
1990	327	90%	No
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	303	83%	No
1995	365	100%	Yes
1996	365	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	305	83%	No
2001	364	100%	Yes
2002	365	100%	Yes
2003	364	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	364	100%	Yes
2008	365	100%	Yes
2009	364	100%	Yes
2010	364	100%	Yes
2011	365	100%	Yes
2012	335	92%	Yes

Latest Records

Latest records at San Ignacio de Los Romero
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 November 2012	San Ignacio de Los Romero, MX	daily low max	21.7 C (71.1 F)	0.5 C (0.9 F)	1 year	4 of 100 (Routine)
12 November 2012	San Ignacio de Los Romero, MX	daily low min	6.7 C (44.1 F)	1.6 C (2.9 F)	24 years	15 of 100 (Routine)
11 November 2012	San Ignacio de Los Romero, MX	daily low min	6.7 C (44.1 F)	1.1 C (2.0 F)	1 year	6 of 100 (Routine)
11 November 2012	San Ignacio de Los Romero, MX	daily low max (Tie)	25.0 C (77.0 F)	tie	33 years	3 of 100 (Routine)
22 October 2012	San Ignacio de Los Romero, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	36 years	3 of 100 (Routine)
17 October 2012	San Ignacio de Los Romero, MX	daily low max (Tie)	25.6 C (78.1 F)	tie	10 years	1 of 100 (Routine)
16 October 2012	San Ignacio de Los Romero, MX	daily rain	20.8 mm (0.8 in)	19.5 mm (0.8 in)	25 years	20 of 100 (Routine)
15 October 2012	San Ignacio de Los Romero, MX	monthly rain	69.6 mm (2.7 in)	14.2 mm (0.6 in)	3 years	23 of 100 (Routine)
15 October 2012	San Ignacio de Los Romero, MX	daily low max	21.7 C (71.1 F)	4.4 C (7.9 F)	24 years	21 of 100 (Routine)
14 October 2012	San Ignacio de Los Romero, MX	daily rain	6.4 mm (0.25 in)	6.1 mm (0.24 in)	1 year	7 of 100 (Routine)
13 October 2012	San Ignacio de Los Romero, MX	daily rain	0.5 mm (0.02 in)	0.5 mm (0.02 in)	36 years	13 of 100 (Routine)
13 October 2012	San Ignacio de Los Romero, MX	daily low max	28.9 C (84.0 F)	1.1 C (2.0 F)	3 years	5 of 100 (Routine)
25 September 2012	San Ignacio de Los Romero, MX	daily low max	26.1 C (79.0 F)	3.9 C (7.0 F)	36 years	25 of 100 (Routine)
25 September 2012	San Ignacio de Los Romero, MX	daily high min (Tie)	23.9 C (75.0 F)	tie	18 years	2 of 100 (Routine)
15 September 2012	San Ignacio de Los Romero, MX	daily low max (Tie)	28.9 C (84.0 F)	tie	16 years	1 of 100 (Routine)
6 September 2012	San Ignacio de Los Romero, MX	daily low max	30.0 C (86.0 F)	2.2 C (4.0 F)	16 years	13 of 100 (Routine)
31 August 2012	San Ignacio de Los Romero, MX	daily rain	4.8 mm (0.19 in)	2.0 mm (0.08 in)	23 years	9 of 100 (Routine)
29 August 2012	San Ignacio de Los Romero, MX	daily rain	41.1 mm (1.6 in)	2.7 mm (0.11 in)	13 years	7 of 100 (Routine)
17 August 2012	San Ignacio de Los Romero, MX	daily low max	27.8 C (82.0 F)	5.0 C (9.0 F)	28 years	29 of 100 (Routine)
17 August 2012	San Ignacio de Los Romero, MX	daily rain	3.8 mm (0.15 in)	3.0 mm (0.12 in)	11 years	7 of 100 (Routine)

Climate Trend

24 complete years, 1985 to 2011

One stripe for each of 24 complete years at San Ignacio de Los Romero, 1985 to 2011. Blue stripes are years cooler than the station's own mean of 22.8 C (73.1 F); red stripes are warmer. The coolest year was 1999, at 22.0 C (71.7 F), and the warmest was 2006, at 24.1 C (75.4 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at San Ignacio de Los Romero as warming stripes, 1985 to 2011
Year	Annual mean temperature	Difference from the station mean
1985	22.3 C	-0.51 C
1986	22.8 C	-0.03 C
1987	22.2 C	-0.61 C
1988	22.1 C	-0.70 C
1989	22.5 C	-0.33 C
1991	22.1 C	-0.76 C
1992	22.9 C	+0.06 C
1993	22.6 C	-0.19 C
1995	22.8 C	-0.02 C
1996	22.6 C	-0.23 C
1997	23.0 C	+0.16 C
1998	22.4 C	-0.39 C
1999	22.0 C	-0.80 C
2001	22.2 C	-0.65 C
2002	22.3 C	-0.56 C
2003	23.7 C	+0.83 C
2004	23.3 C	+0.50 C
2005	23.7 C	+0.90 C
2006	24.1 C	+1.27 C
2007	23.3 C	+0.44 C
2008	23.4 C	+0.57 C
2009	23.8 C	+0.97 C
2010	23.1 C	+0.22 C
2011	22.6 C	-0.26 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

1976 to 2012

Yearly extremes at San Ignacio de Los Romero: 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)	1987	42.2 C (108.0 F)	37
Coldest night (TNn)	-2.2 C (28.0 F)	1987	2.8 C (37.0 F)	37
Wettest day (Rx1day)	148.6 mm (5.9 in)	1997	38.9 mm (1.5 in)	37
Wettest five days (Rx5day)	254.1 mm (10.0 in)	2003	47.5 mm (1.9 in)	37
Longest dry spell (CDD)	237 days	2001	170 days	37

Hottest day (TXx)

The hottest day of the year at San Ignacio de Los Romero, 1976 to 2012. The record is 45.0 C (113.0 F) in 1987, marked on the chart; the median year is 42.2 C (108.0 F).

Hottest day (TXx) at San Ignacio de Los Romero by year
Year	Hottest day (TXx)
1976	37.8 C (100.0 F)
1977	40.6 C (105.1 F)
1978	40.0 C (104.0 F)
1979	42.2 C (108.0 F)
1980	43.9 C (111.0 F)
1981	42.2 C (108.0 F)
1982	42.2 C (108.0 F)
1983	40.0 C (104.0 F)
1984	40.0 C (104.0 F)
1985	43.3 C (109.9 F)
1986	42.8 C (109.0 F)
1987	45.0 C (113.0 F)
1988	42.2 C (108.0 F)
1989	42.2 C (108.0 F)
1990	41.7 C (107.1 F)
1991	41.1 C (106.0 F)
1992	43.9 C (111.0 F)
1993	43.3 C (109.9 F)
1994	40.6 C (105.1 F)
1995	41.7 C (107.1 F)
1996	41.7 C (107.1 F)
1997	43.3 C (109.9 F)
1998	42.8 C (109.0 F)
1999	40.6 C (105.1 F)
2000	41.7 C (107.1 F)
2001	42.2 C (108.0 F)
2002	41.7 C (107.1 F)
2003	44.4 C (111.9 F)
2004	42.8 C (109.0 F)
2005	45.0 C (113.0 F)
2006	43.9 C (111.0 F)
2007	41.7 C (107.1 F)
2008	45.0 C (113.0 F)
2009	43.3 C (109.9 F)
2010	45.0 C (113.0 F)
2011	43.9 C (111.0 F)
2012	39.4 C (102.9 F)

Coldest night (TNn)

The coldest night of the year at San Ignacio de Los Romero, 1976 to 2012. The record is -2.2 C (28.0 F) in 1987, marked on the chart; the median year is 2.8 C (37.0 F).

Coldest night (TNn) at San Ignacio de Los Romero by year
Year	Coldest night (TNn)
1976	5.0 C (41.0 F)
1977	4.4 C (39.9 F)
1978	0.0 C (32.0 F)
1979	1.7 C (35.1 F)
1980	5.0 C (41.0 F)
1981	2.8 C (37.0 F)
1982	5.0 C (41.0 F)
1983	6.1 C (43.0 F)
1984	5.0 C (41.0 F)
1985	0.6 C (33.1 F)
1986	5.0 C (41.0 F)
1987	-2.2 C (28.0 F)
1988	1.1 C (34.0 F)
1989	2.8 C (37.0 F)
1990	1.1 C (34.0 F)
1991	2.8 C (37.0 F)
1992	3.9 C (39.0 F)
1993	3.3 C (37.9 F)
1994	2.8 C (37.0 F)
1995	4.4 C (39.9 F)
1996	3.3 C (37.9 F)
1997	2.2 C (36.0 F)
1998	2.8 C (37.0 F)
1999	2.8 C (37.0 F)
2000	2.8 C (37.0 F)
2001	1.1 C (34.0 F)
2002	1.7 C (35.1 F)
2003	0.6 C (33.1 F)
2004	2.2 C (36.0 F)
2005	5.0 C (41.0 F)
2006	2.8 C (37.0 F)
2007	2.8 C (37.0 F)
2008	2.8 C (37.0 F)
2009	5.0 C (41.0 F)
2010	0.6 C (33.1 F)
2011	0.6 C (33.1 F)
2012	2.2 C (36.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Ignacio de Los Romero, 1976 to 2012. The record is 148.6 mm (5.9 in) in 1997, marked on the chart; the median year is 38.9 mm (1.5 in).

Wettest day (Rx1day) at San Ignacio de Los Romero by year
Year	Wettest day (Rx1day)
1976	10.9 mm (0.4 in)
1977	26.4 mm (1.0 in)
1978	43.9 mm (1.7 in)
1979	62.0 mm (2.4 in)
1980	2.8 mm (0.11 in)
1981	34.8 mm (1.4 in)
1982	18.8 mm (0.7 in)
1983	68.8 mm (2.7 in)
1984	70.4 mm (2.8 in)
1985	26.4 mm (1.0 in)
1986	48.8 mm (1.9 in)
1987	31.8 mm (1.3 in)
1988	29.7 mm (1.2 in)
1989	47.5 mm (1.9 in)
1990	38.9 mm (1.5 in)
1991	58.9 mm (2.3 in)
1992	33.8 mm (1.3 in)
1993	58.9 mm (2.3 in)
1994	58.9 mm (2.3 in)
1995	28.4 mm (1.1 in)
1996	27.9 mm (1.1 in)
1997	148.6 mm (5.9 in)
1998	20.1 mm (0.8 in)
1999	38.4 mm (1.5 in)
2000	14.0 mm (0.6 in)
2001	48.3 mm (1.9 in)
2002	87.4 mm (3.4 in)
2003	148.1 mm (5.8 in)
2004	44.5 mm (1.8 in)
2005	34.8 mm (1.4 in)
2006	91.9 mm (3.6 in)
2007	18.0 mm (0.7 in)
2008	96.3 mm (3.8 in)
2009	140.5 mm (5.5 in)
2010	19.8 mm (0.8 in)
2011	15.0 mm (0.6 in)
2012	69.6 mm (2.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Ignacio de Los Romero, 1976 to 2012. The record is 254.1 mm (10.0 in) in 2003, marked on the chart; the median year is 47.5 mm (1.9 in).

Wettest five days (Rx5day) at San Ignacio de Los Romero by year
Year	Wettest five days (Rx5day)
1976	17.3 mm (0.7 in)
1977	25.1 mm (1.0 in)
1978	80.7 mm (3.2 in)
1979	105.6 mm (4.2 in)
1980	2.8 mm (0.11 in)
1981	34.8 mm (1.4 in)
1982	28.7 mm (1.1 in)
1983	68.8 mm (2.7 in)
1984	110.1 mm (4.3 in)
1985	40.2 mm (1.6 in)
1986	89.5 mm (3.5 in)
1987	36.4 mm (1.4 in)
1988	30.5 mm (1.2 in)
1989	47.5 mm (1.9 in)
1990	39.5 mm (1.6 in)
1991	64.6 mm (2.5 in)
1992	41.2 mm (1.6 in)
1993	67.3 mm (2.6 in)
1994	58.9 mm (2.3 in)
1995	45.8 mm (1.8 in)
1996	51.6 mm (2.0 in)
1997	177.3 mm (7.0 in)
1998	29.8 mm (1.2 in)
1999	42.7 mm (1.7 in)
2000	14.0 mm (0.6 in)
2001	94.1 mm (3.7 in)
2002	102.2 mm (4.0 in)
2003	254.1 mm (10.0 in)
2004	84.2 mm (3.3 in)
2005	47.2 mm (1.9 in)
2006	123.1 mm (4.8 in)
2007	24.4 mm (1.0 in)
2008	154.3 mm (6.1 in)
2009	161.4 mm (6.4 in)
2010	19.8 mm (0.8 in)
2011	29.7 mm (1.2 in)
2012	97.3 mm (3.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Ignacio de Los Romero, 1976 to 2012. The record is 237 days in 2001, marked on the chart; the median year is 170 days.

Longest dry spell (CDD) at San Ignacio de Los Romero by year
Year	Longest dry spell (CDD)
1976	66 days
1977	83 days
1978	63 days
1979	226 days
1980	191 days
1981	104 days
1982	117 days
1983	49 days
1984	88 days
1985	188 days
1986	85 days
1987	204 days
1988	203 days
1989	123 days
1990	77 days
1991	162 days
1992	92 days
1993	103 days
1994	181 days
1995	147 days
1996	171 days
1997	197 days
1998	120 days
1999	234 days
2000	145 days
2001	237 days
2002	215 days
2003	170 days
2004	174 days
2005	142 days
2006	202 days
2007	171 days
2008	107 days
2009	199 days
2010	171 days
2011	184 days
2012	179 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.

Download the Data

Data for San Ignacio de Los Romero standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Ignacio de Los Romero 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).