San Pedro Weather Records (MXN00016219)

Record envelope, standing records and threshold days for San Pedro (MXN00016219), Mexico, with 33 years of record.

Key Facts for San Pedro

San Pedro (MXN00016219) is a weather station in Mexico at 19.07 latitude and -100.82 longitude, 530 m (1,738 ft) above sea level.
The station reports from 1979 to 2011, 33 years of record.
1,464 records set at San Pedro still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Pedro set a daily record low minimum temperature of 9.4 C (48.9 F) on 29 November 2011.

About the Station

Location: Mexico, 19.07 latitude, -100.82 longitude.
Elevation: 530 m (1,738 ft).
Period of record: 1979 to 2011, 33 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 Pedro. 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 Pedro, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.8 C (100.0 F)	2.2 C (36.0 F)	n/a	n/a
Feb	40.6 C (105.1 F)	5.0 C (41.0 F)	n/a	n/a
Mar	43.9 C (111.0 F)	7.2 C (45.0 F)	n/a	n/a
Apr	45.0 C (113.0 F)	11.7 C (53.1 F)	n/a	n/a
May	48.9 C (120.0 F)	12.8 C (55.0 F)	n/a	n/a
Jun	45.0 C (113.0 F)	17.8 C (64.0 F)	n/a	n/a
Jul	40.0 C (104.0 F)	17.8 C (64.0 F)	n/a	n/a
Aug	37.8 C (100.0 F)	16.7 C (62.1 F)	n/a	n/a
Sep	36.7 C (98.1 F)	14.4 C (57.9 F)	n/a	n/a
Oct	38.9 C (102.0 F)	10.6 C (51.1 F)	n/a	n/a
Nov	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
Dec	37.8 C (100.0 F)	5.0 C (41.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Pedro still stand. 1980 holds the most, with 84.

Standing records at San Pedro by the year they were set
Year set	Standing records
1979	52
1980	84
1981	72
1982	65
1983	61
1984	41
1985	23
1986	52
1987	33
1988	37
1989	37
1990	32
1991	26
1992	53
1993	36
1994	59
1995	39
1996	47
1997	59
1998	55
1999	46
2000	33
2001	33
2002	45
2003	34
2004	26
2005	46
2006	64
2007	38
2008	28
2009	30
2010	59
2011	19

Wettest Day of Each Month

Jul: 114.6 mm (4.5 in)

The wettest day on record for each calendar month at San Pedro. The most was 114.6 mm (4.5 in) on 2 July 1990.

Record daily precipitation for each month at San Pedro
Month	Record daily precipitation (mm)	Date
Jan	65.3 mm (2.6 in)	24 January 1980
Feb	89.9 mm (3.5 in)	3 February 2010
Mar	22.4 mm (0.9 in)	15 March 2005
Apr	15.5 mm (0.6 in)	14 April 2008
May	66.3 mm (2.6 in)	24 May 1995
Jun	88.1 mm (3.5 in)	29 June 1981
Jul	114.6 mm (4.5 in)	2 July 1990
Aug	99.3 mm (3.9 in)	26 August 2007
Sep	95.3 mm (3.8 in)	7 September 2008
Oct	62.5 mm (2.5 in)	14 October 2003
Nov	47.5 mm (1.9 in)	20 November 1985
Dec	23.1 mm (0.9 in)	2 December 1986

Period of Record Coverage

1979 to 2011

33 years of record at San Pedro, 1979 to 2011. 3 years have data for under 90 percent of days and are left out of rankings: 1979, 1985, 1987.

Days with data per year at San Pedro
Year	Days with data	Share of year	Complete
1979	153	42%	No
1980	365	100%	Yes
1981	363	99%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	306	84%	No
1986	337	92%	Yes
1987	211	58%	No
1988	365	100%	Yes
1989	362	99%	Yes
1990	362	99%	Yes
1991	364	100%	Yes
1992	360	98%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	363	99%	Yes
1996	364	99%	Yes
1997	363	99%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	365	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	363	99%	Yes
2004	360	98%	Yes
2005	358	98%	Yes
2006	360	99%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	363	99%	Yes
2011	365	100%	Yes

Latest Records

Latest records at San Pedro
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 November 2011	San Pedro, MX	daily low min	9.4 C (48.9 F)	0.6 C (1.1 F)	12 years	8 of 100 (Routine)
23 November 2011	San Pedro, MX	daily rain	1.0 mm (0.04 in)	1.0 mm (0.04 in)	32 years	13 of 100 (Routine)
14 November 2011	San Pedro, MX	daily low max	31.7 C (89.1 F)	0.5 C (0.9 F)	30 years	15 of 100 (Routine)
13 November 2011	San Pedro, MX	daily low max	31.7 C (89.1 F)	0.5 C (0.9 F)	30 years	15 of 100 (Routine)
11 November 2011	San Pedro, MX	daily low max (Tie)	31.7 C (89.1 F)	tie	4 years	1 of 100 (Routine)
2 November 2011	San Pedro, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	22 years	2 of 100 (Routine)
25 October 2011	San Pedro, MX	daily low max	30.6 C (87.1 F)	1.1 C (2.0 F)	29 years	17 of 100 (Routine)
25 October 2011	San Pedro, MX	daily low min (Tie)	15.0 C (59.0 F)	tie	12 years	1 of 100 (Routine)
24 October 2011	San Pedro, MX	daily low min	15.6 C (60.1 F)	0.5 C (0.9 F)	13 years	9 of 100 (Routine)
23 October 2011	San Pedro, MX	daily low min (Tie)	15.6 C (60.1 F)	tie	13 years	1 of 100 (Routine)
7 October 2011	San Pedro, MX	daily rain	48.3 mm (1.9 in)	17.8 mm (0.7 in)	10 years	20 of 100 (Routine)
22 September 2011	San Pedro, MX	daily rain	62.5 mm (2.5 in)	2.3 mm (0.09 in)	2 years	4 of 100 (Routine)
15 September 2011	San Pedro, MX	daily low min (Tie)	20.0 C (68.0 F)	tie	28 years	2 of 100 (Routine)
11 September 2011	San Pedro, MX	daily low min (Tie)	18.9 C (66.0 F)	tie	5 years	1 of 100 (Routine)
7 September 2011	San Pedro, MX	daily high min (Tie)	21.7 C (71.1 F)	tie	20 years	2 of 100 (Routine)
22 August 2011	San Pedro, MX	daily high min (Tie)	22.2 C (72.0 F)	tie	28 years	2 of 100 (Routine)
10 August 2011	San Pedro, MX	daily high min (Tie)	22.2 C (72.0 F)	tie	14 years	1 of 100 (Routine)
9 August 2011	San Pedro, MX	daily high min	22.2 C (72.0 F)	0.5 C (0.9 F)	30 years	17 of 100 (Routine)
8 August 2011	San Pedro, MX	daily high min (Tie)	22.2 C (72.0 F)	tie	30 years	3 of 100 (Routine)
2 August 2011	San Pedro, MX	daily high min	22.2 C (72.0 F)	0.5 C (0.9 F)	30 years	17 of 100 (Routine)

Climate Trend

26 complete years, 1980 to 2011

One stripe for each of 26 complete years at San Pedro, 1980 to 2011. Blue stripes are years cooler than the station's own mean of 27.0 C (80.6 F); red stripes are warmer. The coolest year was 2010, at 25.9 C (78.7 F), and the warmest was 1994, at 28.1 C (82.6 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at San Pedro as warming stripes, 1980 to 2011
Year	Annual mean temperature	Difference from the station mean
1980	26.7 C	-0.32 C
1981	26.4 C	-0.60 C
1982	27.3 C	+0.33 C
1983	26.4 C	-0.59 C
1984	26.3 C	-0.70 C
1988	27.0 C	+0.02 C
1989	27.1 C	+0.14 C
1990	27.1 C	+0.16 C
1991	27.5 C	+0.48 C
1992	27.0 C	-0.02 C
1993	27.6 C	+0.60 C
1994	28.1 C	+1.11 C
1995	27.6 C	+0.63 C
1996	26.5 C	-0.45 C
1997	27.1 C	+0.09 C
1998	27.2 C	+0.25 C
1999	26.6 C	-0.37 C
2000	26.6 C	-0.43 C
2003	27.4 C	+0.42 C
2004	27.0 C	+0.06 C
2006	26.4 C	-0.61 C
2007	27.2 C	+0.17 C
2008	27.4 C	+0.41 C
2009	27.7 C	+0.73 C
2010	25.9 C	-1.04 C
2011	26.5 C	-0.52 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

1979 to 2011

Yearly extremes at San Pedro: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	48.9 C (120.0 F)	1984	43.9 C (111.0 F)	33
Coldest night (TNn)	2.2 C (36.0 F)	1997	8.3 C (46.9 F)	33
Wettest day (Rx1day)	114.6 mm (4.5 in)	1990	60.2 mm (2.4 in)	33
Wettest five days (Rx5day)	236.0 mm (9.3 in)	1998	127.8 mm (5.0 in)	33
Longest dry spell (CDD)	163 days	1989	111 days	33

Hottest day (TXx)

The hottest day of the year at San Pedro, 1979 to 2011. The record is 48.9 C (120.0 F) in 1984, marked on the chart; the median year is 43.9 C (111.0 F).

Hottest day (TXx) at San Pedro by year
Year	Hottest day (TXx)
1979	38.9 C (102.0 F)
1980	43.3 C (109.9 F)
1981	42.2 C (108.0 F)
1982	43.9 C (111.0 F)
1983	43.3 C (109.9 F)
1984	48.9 C (120.0 F)
1985	41.7 C (107.1 F)
1986	42.8 C (109.0 F)
1987	43.9 C (111.0 F)
1988	43.9 C (111.0 F)
1989	42.8 C (109.0 F)
1990	42.2 C (108.0 F)
1991	43.9 C (111.0 F)
1992	42.8 C (109.0 F)
1993	43.9 C (111.0 F)
1994	44.4 C (111.9 F)
1995	43.9 C (111.0 F)
1996	43.9 C (111.0 F)
1997	43.9 C (111.0 F)
1998	44.4 C (111.9 F)
1999	43.9 C (111.0 F)
2000	43.3 C (109.9 F)
2001	43.3 C (109.9 F)
2002	43.9 C (111.0 F)
2003	45.0 C (113.0 F)
2004	43.9 C (111.0 F)
2005	45.0 C (113.0 F)
2006	43.9 C (111.0 F)
2007	42.8 C (109.0 F)
2008	43.9 C (111.0 F)
2009	43.3 C (109.9 F)
2010	43.3 C (109.9 F)
2011	41.7 C (107.1 F)

Coldest night (TNn)

The coldest night of the year at San Pedro, 1979 to 2011. The record is 2.2 C (36.0 F) in 1997, marked on the chart; the median year is 8.3 C (46.9 F).

Coldest night (TNn) at San Pedro by year
Year	Coldest night (TNn)
1979	10.0 C (50.0 F)
1980	8.9 C (48.0 F)
1981	8.3 C (46.9 F)
1982	8.3 C (46.9 F)
1983	7.8 C (46.0 F)
1984	10.0 C (50.0 F)
1985	12.2 C (54.0 F)
1986	10.6 C (51.1 F)
1987	7.8 C (46.0 F)
1988	7.8 C (46.0 F)
1989	9.4 C (48.9 F)
1990	10.0 C (50.0 F)
1991	8.9 C (48.0 F)
1992	10.0 C (50.0 F)
1993	10.0 C (50.0 F)
1994	10.6 C (51.1 F)
1995	10.0 C (50.0 F)
1996	7.8 C (46.0 F)
1997	2.2 C (36.0 F)
1998	5.0 C (41.0 F)
1999	5.0 C (41.0 F)
2000	7.8 C (46.0 F)
2001	8.9 C (48.0 F)
2002	6.1 C (43.0 F)
2003	7.8 C (46.0 F)
2004	7.8 C (46.0 F)
2005	6.7 C (44.1 F)
2006	5.0 C (41.0 F)
2007	8.9 C (48.0 F)
2008	10.0 C (50.0 F)
2009	8.3 C (46.9 F)
2010	6.7 C (44.1 F)
2011	6.7 C (44.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Pedro, 1979 to 2011. The record is 114.6 mm (4.5 in) in 1990, marked on the chart; the median year is 60.2 mm (2.4 in).

Wettest day (Rx1day) at San Pedro by year
Year	Wettest day (Rx1day)
1979	47.8 mm (1.9 in)
1980	65.3 mm (2.6 in)
1981	88.1 mm (3.5 in)
1982	50.8 mm (2.0 in)
1983	60.2 mm (2.4 in)
1984	47.0 mm (1.9 in)
1985	51.1 mm (2.0 in)
1986	93.0 mm (3.7 in)
1987	31.0 mm (1.2 in)
1988	80.8 mm (3.2 in)
1989	46.7 mm (1.8 in)
1990	114.6 mm (4.5 in)
1991	67.8 mm (2.7 in)
1992	50.3 mm (2.0 in)
1993	48.0 mm (1.9 in)
1994	72.6 mm (2.9 in)
1995	66.3 mm (2.6 in)
1996	82.6 mm (3.3 in)
1997	51.1 mm (2.0 in)
1998	96.0 mm (3.8 in)
1999	54.6 mm (2.1 in)
2000	49.5 mm (1.9 in)
2001	46.2 mm (1.8 in)
2002	86.9 mm (3.4 in)
2003	62.5 mm (2.5 in)
2004	50.3 mm (2.0 in)
2005	57.2 mm (2.3 in)
2006	39.1 mm (1.5 in)
2007	99.3 mm (3.9 in)
2008	95.3 mm (3.8 in)
2009	59.9 mm (2.4 in)
2010	89.9 mm (3.5 in)
2011	62.5 mm (2.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Pedro, 1979 to 2011. The record is 236.0 mm (9.3 in) in 1998, marked on the chart; the median year is 127.8 mm (5.0 in).

Wettest five days (Rx5day) at San Pedro by year
Year	Wettest five days (Rx5day)
1979	110.0 mm (4.3 in)
1980	129.2 mm (5.1 in)
1981	156.0 mm (6.1 in)
1982	90.4 mm (3.6 in)
1983	153.7 mm (6.1 in)
1984	101.3 mm (4.0 in)
1985	115.5 mm (4.5 in)
1986	93.3 mm (3.7 in)
1987	73.7 mm (2.9 in)
1988	144.8 mm (5.7 in)
1989	78.2 mm (3.1 in)
1990	200.7 mm (7.9 in)
1991	127.8 mm (5.0 in)
1992	111.0 mm (4.4 in)
1993	122.0 mm (4.8 in)
1994	141.2 mm (5.6 in)
1995	104.4 mm (4.1 in)
1996	159.9 mm (6.3 in)
1997	128.1 mm (5.0 in)
1998	236.0 mm (9.3 in)
1999	95.3 mm (3.8 in)
2000	82.3 mm (3.2 in)
2001	128.0 mm (5.0 in)
2002	131.8 mm (5.2 in)
2003	138.3 mm (5.4 in)
2004	127.8 mm (5.0 in)
2005	95.5 mm (3.8 in)
2006	83.9 mm (3.3 in)
2007	204.0 mm (8.0 in)
2008	195.9 mm (7.7 in)
2009	178.4 mm (7.0 in)
2010	197.9 mm (7.8 in)
2011	125.0 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Pedro, 1979 to 2011. The record is 163 days in 1989, marked on the chart; the median year is 111 days.

Longest dry spell (CDD) at San Pedro by year
Year	Longest dry spell (CDD)
1979	34 days
1980	114 days
1981	59 days
1982	53 days
1983	72 days
1984	89 days
1985	49 days
1986	109 days
1987	152 days
1988	95 days
1989	163 days
1990	125 days
1991	146 days
1992	63 days
1993	130 days
1994	156 days
1995	142 days
1996	135 days
1997	48 days
1998	155 days
1999	160 days
2000	141 days
2001	78 days
2002	83 days
2003	126 days
2004	82 days
2005	91 days
2006	121 days
2007	69 days
2008	104 days
2009	118 days
2010	111 days
2011	121 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, 1980 to 2011

A day with at least 63.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 136.6 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at San Pedro: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.4 mm (2.5 in)
5 years	81.7 mm (3.2 in)
10 years	94.4 mm (3.7 in)
25 years	110.9 mm (4.4 in)
50 years	123.6 mm (4.9 in)	Longer than the 31 years of record
100 years	136.6 mm (5.4 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 1980 to 2011.

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: 114.6 mm (4.5 in) in 1990; 99.3 mm (3.9 in) in 2007; 96.0 mm (3.8 in) in 1998.

Download the Data

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