San Nicolas Weather Records (MXN00019107)

Record envelope, standing records and threshold days for San Nicolas (MXN00019107), Mexico, with 34 years of record.

Key Facts for San Nicolas

San Nicolas (MXN00019107) is a weather station in Mexico at 27.53 latitude and -99.97 longitude, 239 m (784 ft) above sea level.
The station reports from 1978 to 2011, 34 years of record.
1,464 records set at San Nicolas still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 27.53 latitude, -99.97 longitude.
Elevation: 239 m (784 ft).
Period of record: 1978 to 2011, 34 years.
Eligible elements: none yet.

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 Nicolas. 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 Nicolas, 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)	-6.1 C (21.0 F)	n/a	n/a
Feb	36.7 C (98.1 F)	-8.3 C (17.1 F)	n/a	n/a
Mar	40.6 C (105.1 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	43.9 C (111.0 F)	1.7 C (35.1 F)	n/a	n/a
May	45.0 C (113.0 F)	5.6 C (42.1 F)	n/a	n/a
Jun	45.6 C (114.1 F)	11.7 C (53.1 F)	n/a	n/a
Jul	41.7 C (107.1 F)	10.6 C (51.1 F)	n/a	n/a
Aug	42.8 C (109.0 F)	15.6 C (60.1 F)	n/a	n/a
Sep	40.6 C (105.1 F)	8.3 C (46.9 F)	n/a	n/a
Oct	40.0 C (104.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	-11.1 C (12.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Nicolas still stand. 2005 holds the most, with 182.

Standing records at San Nicolas by the year they were set
Year set	Standing records
1978	35
1979	63
1980	61
1981	48
1982	69
1983	51
1984	21
1985	40
1986	22
1987	38
1988	45
1989	72
1990	50
1991	61
1992	31
1993	40
1994	5
1995	60
1996	9
2001	42
2002	64
2003	45
2004	50
2005	182
2006	107
2008	22
2009	54
2010	16
2011	61

Wettest Day of Each Month

Oct: 255.8 mm (10.1 in)

The wettest day on record for each calendar month at San Nicolas. The most was 255.8 mm (10.1 in) on 12 October 2003.

Record daily precipitation for each month at San Nicolas
Month	Record daily precipitation (mm)	Date
Jan	77.5 mm (3.1 in)	20 January 1994
Feb	49.8 mm (2.0 in)	2 February 2010
Mar	95.0 mm (3.7 in)	13 March 2004
Apr	63.5 mm (2.5 in)	7 April 1985
May	169.9 mm (6.7 in)	4 May 2008
Jun	114.8 mm (4.5 in)	30 June 2010
Jul	101.9 mm (4.0 in)	14 July 1987
Aug	99.8 mm (3.9 in)	30 August 2004
Sep	99.8 mm (3.9 in)	7 September 1986
Oct	255.8 mm (10.1 in)	12 October 2003
Nov	87.9 mm (3.5 in)	16 November 1995
Dec	41.9 mm (1.6 in)	9 December 1982

Period of Record Coverage

1978 to 2011

29 years of record at San Nicolas, 1978 to 2011. 16 years have data for under 90 percent of days and are left out of rankings: 1978, 1980, 1984, 1986, 1988, 1989, 1992, 1993 and others.

Days with data per year at San Nicolas
Year	Days with data	Share of year	Complete
1978	225	62%	No
1979	362	99%	Yes
1980	270	74%	No
1981	364	100%	Yes
1982	355	97%	Yes
1983	331	91%	Yes
1984	147	40%	No
1985	358	98%	Yes
1986	228	62%	No
1987	343	94%	Yes
1988	320	87%	No
1989	302	83%	No
1990	338	93%	Yes
1991	351	96%	Yes
1992	307	84%	No
1993	311	85%	No
1994	20	5%	No
1995	181	50%	No
1996	31	8%	No
2001	185	51%	No
2002	363	99%	Yes
2003	303	83%	No
2004	332	91%	Yes
2005	322	88%	No
2006	303	83%	No
2008	366	100%	Yes
2009	302	83%	No
2010	362	99%	Yes
2011	358	98%	Yes

Latest Records

No records were set at this station in the latest data.

Climate Trend

14 complete years, 1979 to 2011

One stripe for each of 14 complete years at San Nicolas, 1979 to 2011. Blue stripes are years cooler than the station's own mean of 21.6 C (70.8 F); red stripes are warmer. The coolest year was 2005, at 16.7 C (62.0 F), and the warmest was 1990, at 23.3 C (73.9 F). The strongest colour marks a difference of 5.0 C (9.0 F).

Annual mean temperature at San Nicolas as warming stripes, 1979 to 2011
Year	Annual mean temperature	Difference from the station mean
1979	21.3 C	-0.29 C
1981	21.5 C	-0.13 C
1982	22.0 C	+0.40 C
1985	21.8 C	+0.23 C
1987	21.4 C	-0.18 C
1988	22.2 C	+0.66 C
1990	23.3 C	+1.67 C
1991	23.1 C	+1.47 C
1993	22.5 C	+0.93 C
2002	22.1 C	+0.48 C
2005	16.7 C	-4.91 C
2008	21.2 C	-0.42 C
2010	20.4 C	-1.16 C
2011	22.8 C	+1.25 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

1978 to 2011

Yearly extremes at San Nicolas: 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)	2001	41.1 C (106.0 F)	29
Coldest night (TNn)	-11.1 C (12.0 F)	1989	-2.2 C (28.0 F)	29
Wettest day (Rx1day)	255.8 mm (10.1 in)	2003	75.9 mm (3.0 in)	29
Wettest five days (Rx5day)	261.4 mm (10.3 in)	2010	90.2 mm (3.6 in)	29
Longest dry spell (CDD)	115 days	2006	62 days	29

Hottest day (TXx)

The hottest day of the year at San Nicolas, 1978 to 2011. The record is 45.6 C (114.1 F) in 2001, marked on the chart; the median year is 41.1 C (106.0 F).

Hottest day (TXx) at San Nicolas by year
Year	Hottest day (TXx)
1978	40.0 C (104.0 F)
1979	41.7 C (107.1 F)
1980	41.7 C (107.1 F)
1981	39.4 C (102.9 F)
1982	40.0 C (104.0 F)
1983	43.3 C (109.9 F)
1984	41.7 C (107.1 F)
1985	39.4 C (102.9 F)
1986	40.0 C (104.0 F)
1987	38.9 C (102.0 F)
1988	41.1 C (106.0 F)
1989	42.8 C (109.0 F)
1990	43.9 C (111.0 F)
1991	41.7 C (107.1 F)
1992	42.2 C (108.0 F)
1993	41.1 C (106.0 F)
1994	34.4 C (93.9 F)
1995	40.0 C (104.0 F)
1996	35.6 C (96.1 F)
2001	45.6 C (114.1 F)
2002	45.0 C (113.0 F)
2003	42.8 C (109.0 F)
2004	43.9 C (111.0 F)
2005	31.7 C (89.1 F)
2006	30.0 C (86.0 F)
2008	40.0 C (104.0 F)
2009	41.7 C (107.1 F)
2010	38.9 C (102.0 F)
2011	40.6 C (105.1 F)

Coldest night (TNn)

The coldest night of the year at San Nicolas, 1978 to 2011. The record is -11.1 C (12.0 F) in 1989, marked on the chart; the median year is -2.2 C (28.0 F).

Coldest night (TNn) at San Nicolas by year
Year	Coldest night (TNn)
1978	-5.0 C (23.0 F)
1979	-6.1 C (21.0 F)
1980	-4.4 C (24.1 F)
1981	-8.3 C (17.1 F)
1982	-5.6 C (21.9 F)
1983	-10.0 C (14.0 F)
1984	-2.2 C (28.0 F)
1985	-4.4 C (24.1 F)
1986	-1.1 C (30.0 F)
1987	-2.2 C (28.0 F)
1988	-4.4 C (24.1 F)
1989	-11.1 C (12.0 F)
1990	-4.4 C (24.1 F)
1991	-1.1 C (30.0 F)
1992	0.0 C (32.0 F)
1993	-3.3 C (26.1 F)
1994	-1.1 C (30.0 F)
1995	2.8 C (37.0 F)
1996	-2.2 C (28.0 F)
2001	0.6 C (33.1 F)
2002	0.0 C (32.0 F)
2003	0.0 C (32.0 F)
2004	0.6 C (33.1 F)
2005	0.0 C (32.0 F)
2006	-1.1 C (30.0 F)
2008	-2.2 C (28.0 F)
2009	-1.1 C (30.0 F)
2010	-3.3 C (26.1 F)
2011	-5.0 C (23.0 F)

Wettest day (Rx1day)

The wettest day of the year at San Nicolas, 1978 to 2011. The record is 255.8 mm (10.1 in) in 2003, marked on the chart; the median year is 75.9 mm (3.0 in).

Wettest day (Rx1day) at San Nicolas by year
Year	Wettest day (Rx1day)
1978	41.9 mm (1.6 in)
1979	52.8 mm (2.1 in)
1980	72.9 mm (2.9 in)
1981	54.9 mm (2.2 in)
1982	41.9 mm (1.6 in)
1983	23.9 mm (0.9 in)
1984	31.8 mm (1.3 in)
1985	79.8 mm (3.1 in)
1986	99.8 mm (3.9 in)
1987	101.9 mm (4.0 in)
1988	83.8 mm (3.3 in)
1989	86.9 mm (3.4 in)
1990	97.8 mm (3.9 in)
1991	46.0 mm (1.8 in)
1992	59.9 mm (2.4 in)
1993	53.8 mm (2.1 in)
1994	77.5 mm (3.1 in)
1995	87.9 mm (3.5 in)
1996	0.0 mm (0.00 in)
2001	42.9 mm (1.7 in)
2002	75.9 mm (3.0 in)
2003	255.8 mm (10.1 in)
2004	99.8 mm (3.9 in)
2005	47.8 mm (1.9 in)
2006	77.0 mm (3.0 in)
2008	169.9 mm (6.7 in)
2009	99.8 mm (3.9 in)
2010	114.8 mm (4.5 in)
2011	33.8 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Nicolas, 1978 to 2011. The record is 261.4 mm (10.3 in) in 2010, marked on the chart; the median year is 90.2 mm (3.6 in).

Wettest five days (Rx5day) at San Nicolas by year
Year	Wettest five days (Rx5day)
1978	75.5 mm (3.0 in)
1979	109.5 mm (4.3 in)
1980	180.9 mm (7.1 in)
1981	90.2 mm (3.6 in)
1982	73.2 mm (2.9 in)
1983	30.3 mm (1.2 in)
1984	52.1 mm (2.1 in)
1985	108.5 mm (4.3 in)
1986	116.8 mm (4.6 in)
1987	102.7 mm (4.0 in)
1988	85.4 mm (3.4 in)
1989	88.5 mm (3.5 in)
1990	174.5 mm (6.9 in)
1991	65.8 mm (2.6 in)
1992	76.2 mm (3.0 in)
1993	72.4 mm (2.9 in)
1994	98.1 mm (3.9 in)
1995	96.3 mm (3.8 in)
1996	4.4 mm (0.17 in)
2001	79.2 mm (3.1 in)
2002	118.5 mm (4.7 in)
2003	255.8 mm (10.1 in)
2004	212.1 mm (8.4 in)
2005	49.5 mm (1.9 in)
2006	82.8 mm (3.3 in)
2008	173.7 mm (6.8 in)
2009	122.4 mm (4.8 in)
2010	261.4 mm (10.3 in)
2011	56.7 mm (2.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Nicolas, 1978 to 2011. The record is 115 days in 2006, marked on the chart; the median year is 62 days.

Longest dry spell (CDD) at San Nicolas by year
Year	Longest dry spell (CDD)
1978	62 days
1979	68 days
1980	39 days
1981	42 days
1982	50 days
1983	65 days
1984	40 days
1985	50 days
1986	64 days
1987	35 days
1988	64 days
1989	31 days
1990	66 days
1991	43 days
1992	51 days
1993	69 days
1994	19 days
1995	65 days
1996	31 days
2001	46 days
2002	93 days
2003	43 days
2004	54 days
2005	73 days
2006	115 days
2008	99 days
2009	94 days
2010	102 days
2011	99 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 Nicolas standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Nicolas 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).