Guillermo Prieto Weather Records (MXN00003122)

Record envelope, standing records and threshold days for Guillermo Prieto (MXN00003122), Mexico, with 34 years of record.

Key Facts for Guillermo Prieto

Guillermo Prieto (MXN00003122) is a weather station in Mexico at 27.83 latitude and -113.32 longitude, 200 m (656 ft) above sea level.
The station reports from 1979 to 2012, 34 years of record.
1,464 records set at Guillermo Prieto still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Guillermo Prieto tied a daily record low minimum temperature of 3.9 C (39.0 F) on 15 November 2012.

About the Station

Location: Mexico, 27.83 latitude, -113.32 longitude.
Elevation: 200 m (656 ft).
Period of record: 1979 to 2012, 34 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 Guillermo Prieto. 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 Guillermo Prieto, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Feb	35.6 C (96.1 F)	0.0 C (32.0 F)	n/a	n/a
Mar	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Apr	40.6 C (105.1 F)	1.7 C (35.1 F)	n/a	n/a
May	40.0 C (104.0 F)	2.8 C (37.0 F)	n/a	n/a
Jun	45.6 C (114.1 F)	2.8 C (37.0 F)	n/a	n/a
Jul	45.6 C (114.1 F)	6.7 C (44.1 F)	n/a	n/a
Aug	45.6 C (114.1 F)	9.4 C (48.9 F)	n/a	n/a
Sep	45.6 C (114.1 F)	8.3 C (46.9 F)	n/a	n/a
Oct	42.8 C (109.0 F)	5.0 C (41.0 F)	n/a	n/a
Nov	42.8 C (109.0 F)	0.0 C (32.0 F)	n/a	n/a
Dec	38.9 C (102.0 F)	-1.1 C (30.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Guillermo Prieto still stand. 1992 holds the most, with 124.

Standing records at Guillermo Prieto by the year they were set
Year set	Standing records
1979	5
1980	21
1981	77
1982	45
1983	51
1984	34
1985	44
1986	56
1987	23
1988	55
1989	27
1990	8
1991	93
1992	124
1993	62
1994	64
1995	65
1996	51
1997	51
1998	40
1999	43
2000	46
2001	24
2002	42
2003	76
2004	44
2005	10
2006	16
2007	32
2008	19
2009	31
2010	28
2011	42
2012	15

Wettest Day of Each Month

Sep: 159.8 mm (6.3 in)

The wettest day on record for each calendar month at Guillermo Prieto. The most was 159.8 mm (6.3 in) on 2 September 2009.

Record daily precipitation for each month at Guillermo Prieto
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	9 January 1992
Feb	33.8 mm (1.3 in)	27 February 1991
Mar	50.8 mm (2.0 in)	2 March 1983
Apr	10.9 mm (0.4 in)	5 April 2001
May	3.8 mm (0.15 in)	1 May 1981
Jun	1.3 mm (0.05 in)	22 June 1999
Jul	64.8 mm (2.6 in)	13 July 1984
Aug	89.9 mm (3.5 in)	24 August 2008
Sep	159.8 mm (6.3 in)	2 September 2009
Oct	129.8 mm (5.1 in)	23 October 2006
Nov	43.9 mm (1.7 in)	8 November 1983
Dec	119.4 mm (4.7 in)	5 December 1994

Period of Record Coverage

1979 to 2012

34 years of record at Guillermo Prieto, 1979 to 2012. 10 years have data for under 90 percent of days and are left out of rankings: 1979, 1980, 1989, 1990, 1992, 1995, 1996, 2003 and others.

Days with data per year at Guillermo Prieto
Year	Days with data	Share of year	Complete
1979	122	33%	No
1980	274	75%	No
1981	353	97%	Yes
1982	350	96%	Yes
1983	348	95%	Yes
1984	353	96%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	335	92%	Yes
1989	120	33%	No
1990	92	25%	No
1991	339	93%	Yes
1992	312	85%	No
1993	365	100%	Yes
1994	365	100%	Yes
1995	322	88%	No
1996	317	87%	No
1997	363	99%	Yes
1998	365	100%	Yes
1999	337	92%	Yes
2000	342	93%	Yes
2001	353	97%	Yes
2002	360	99%	Yes
2003	292	80%	No
2004	260	71%	No
2005	303	83%	No
2006	365	100%	Yes
2007	332	91%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	364	100%	Yes
2012	335	92%	Yes

Latest Records

Latest records at Guillermo Prieto
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 November 2012	Guillermo Prieto, MX	daily low min (Tie)	3.9 C (39.0 F)	tie	1 year	0 of 100 (Routine)
17 October 2012	Guillermo Prieto, MX	daily rain	3.8 mm (0.15 in)	3.8 mm (0.15 in)	33 years	15 of 100 (Routine)
14 October 2012	Guillermo Prieto, MX	daily low min	6.7 C (44.1 F)	1.1 C (2.0 F)	2 years	6 of 100 (Routine)
28 September 2012	Guillermo Prieto, MX	daily low max	26.7 C (80.1 F)	2.2 C (4.0 F)	30 years	17 of 100 (Routine)
15 September 2012	Guillermo Prieto, MX	daily rain (Tie)	7.9 mm (0.31 in)	tie	28 years	2 of 100 (Routine)
14 September 2012	Guillermo Prieto, MX	daily rain	9.9 mm (0.39 in)	9.9 mm (0.39 in)	33 years	15 of 100 (Routine)
16 August 2012	Guillermo Prieto, MX	daily rain	18.8 mm (0.7 in)	18.8 mm (0.7 in)	32 years	20 of 100 (Routine)
4 August 2012	Guillermo Prieto, MX	daily low min (Tie)	13.9 C (57.0 F)	tie	24 years	2 of 100 (Routine)
30 July 2012	Guillermo Prieto, MX	daily low min	10.6 C (51.1 F)	1.1 C (2.0 F)	9 years	8 of 100 (Routine)
10 July 2012	Guillermo Prieto, MX	daily low min	10.6 C (51.1 F)	1.1 C (2.0 F)	15 years	10 of 100 (Routine)
8 July 2012	Guillermo Prieto, MX	daily low min	8.9 C (48.0 F)	1.7 C (3.1 F)	32 years	17 of 100 (Routine)
7 July 2012	Guillermo Prieto, MX	daily low min	10.0 C (50.0 F)	0.6 C (1.1 F)	10 years	7 of 100 (Routine)
6 July 2012	Guillermo Prieto, MX	daily low max (Tie)	28.9 C (84.0 F)	tie	30 years	3 of 100 (Routine)
1 April 2012	Guillermo Prieto, MX	daily low min (Tie)	5.6 C (42.1 F)	tie	31 years	3 of 100 (Routine)
26 March 2012	Guillermo Prieto, MX	daily low min (Tie)	3.9 C (39.0 F)	tie	10 years	1 of 100 (Routine)
20 March 2012	Guillermo Prieto, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	8 years	1 of 100 (Routine)
19 March 2012	Guillermo Prieto, MX	daily rain	5.8 mm (0.23 in)	1.0 mm (0.04 in)	18 years	9 of 100 (Routine)
19 March 2012	Guillermo Prieto, MX	daily low max (Tie)	18.9 C (66.0 F)	tie	29 years	2 of 100 (Routine)
18 March 2012	Guillermo Prieto, MX	monthly low max (Tie)	15.6 C (60.1 F)	tie	29 years	5 of 100 (Routine)
17 March 2012	Guillermo Prieto, MX	daily rain (Tie)	1.8 mm (0.07 in)	tie	26 years	2 of 100 (Routine)

Climate Trend

15 complete years, 1982 to 2011

One stripe for each of 15 complete years at Guillermo Prieto, 1982 to 2011. Blue stripes are years cooler than the station's own mean of 20.2 C (68.4 F); red stripes are warmer. The coolest year was 2011, at 18.1 C (64.5 F), and the warmest was 1997, at 22.0 C (71.6 F). The strongest colour marks a difference of 2.2 C (4.0 F).

Annual mean temperature at Guillermo Prieto as warming stripes, 1982 to 2011
Year	Annual mean temperature	Difference from the station mean
1982	19.2 C	-1.06 C
1985	20.3 C	+0.07 C
1986	21.6 C	+1.36 C
1987	19.5 C	-0.74 C
1993	20.7 C	+0.51 C
1994	21.2 C	+1.00 C
1997	22.0 C	+1.77 C
1998	21.1 C	+0.92 C
2001	20.8 C	+0.62 C
2002	20.6 C	+0.36 C
2006	19.7 C	-0.56 C
2008	20.8 C	+0.54 C
2009	18.9 C	-1.28 C
2010	18.9 C	-1.28 C
2011	18.1 C	-2.16 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 2012

Yearly extremes at Guillermo Prieto: 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)	1981	42.0 C (107.5 F)	34
Coldest night (TNn)	-1.1 C (30.0 F)	1984	0.6 C (33.1 F)	34
Wettest day (Rx1day)	159.8 mm (6.3 in)	2009	20.8 mm (0.8 in)	34
Wettest five days (Rx5day)	217.5 mm (8.6 in)	2009	24.5 mm (1.0 in)	34
Longest dry spell (CDD)	296 days	2010	143 days	34

Hottest day (TXx)

The hottest day of the year at Guillermo Prieto, 1979 to 2012. The record is 45.6 C (114.1 F) in 1981, marked on the chart; the median year is 42.0 C (107.5 F).

Hottest day (TXx) at Guillermo Prieto by year
Year	Hottest day (TXx)
1979	40.0 C (104.0 F)
1980	42.2 C (108.0 F)
1981	45.6 C (114.1 F)
1982	40.6 C (105.1 F)
1983	38.9 C (102.0 F)
1984	37.8 C (100.0 F)
1985	43.9 C (111.0 F)
1986	42.8 C (109.0 F)
1987	41.7 C (107.1 F)
1988	40.0 C (104.0 F)
1989	38.9 C (102.0 F)
1990	37.8 C (100.0 F)
1991	42.8 C (109.0 F)
1992	43.3 C (109.9 F)
1993	40.0 C (104.0 F)
1994	38.9 C (102.0 F)
1995	45.0 C (113.0 F)
1996	43.9 C (111.0 F)
1997	45.6 C (114.1 F)
1998	45.6 C (114.1 F)
1999	42.8 C (109.0 F)
2000	43.9 C (111.0 F)
2001	45.6 C (114.1 F)
2002	43.9 C (111.0 F)
2003	40.6 C (105.1 F)
2004	41.7 C (107.1 F)
2005	43.9 C (111.0 F)
2006	40.6 C (105.1 F)
2007	43.9 C (111.0 F)
2008	41.7 C (107.1 F)
2009	41.7 C (107.1 F)
2010	42.8 C (109.0 F)
2011	40.0 C (104.0 F)
2012	40.6 C (105.1 F)

Coldest night (TNn)

The coldest night of the year at Guillermo Prieto, 1979 to 2012. The record is -1.1 C (30.0 F) in 1984, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at Guillermo Prieto by year
Year	Coldest night (TNn)
1979	3.3 C (37.9 F)
1980	2.8 C (37.0 F)
1981	0.6 C (33.1 F)
1982	1.1 C (34.0 F)
1983	1.7 C (35.1 F)
1984	-1.1 C (30.0 F)
1985	0.0 C (32.0 F)
1986	3.3 C (37.9 F)
1987	0.0 C (32.0 F)
1988	0.6 C (33.1 F)
1989	-1.1 C (30.0 F)
1990	5.6 C (42.1 F)
1991	1.7 C (35.1 F)
1992	2.8 C (37.0 F)
1993	5.0 C (41.0 F)
1994	5.0 C (41.0 F)
1995	1.7 C (35.1 F)
1996	1.1 C (34.0 F)
1997	-1.1 C (30.0 F)
1998	0.0 C (32.0 F)
1999	0.6 C (33.1 F)
2000	0.0 C (32.0 F)
2001	0.0 C (32.0 F)
2002	0.6 C (33.1 F)
2003	2.8 C (37.0 F)
2004	3.9 C (39.0 F)
2005	-1.1 C (30.0 F)
2006	-1.1 C (30.0 F)
2007	0.0 C (32.0 F)
2008	0.0 C (32.0 F)
2009	0.6 C (33.1 F)
2010	0.6 C (33.1 F)
2011	0.0 C (32.0 F)
2012	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Guillermo Prieto, 1979 to 2012. The record is 159.8 mm (6.3 in) in 2009, marked on the chart; the median year is 20.8 mm (0.8 in).

Wettest day (Rx1day) at Guillermo Prieto by year
Year	Wettest day (Rx1day)
1979	2.8 mm (0.11 in)
1980	15.0 mm (0.6 in)
1981	18.8 mm (0.7 in)
1982	29.5 mm (1.2 in)
1983	50.8 mm (2.0 in)
1984	64.8 mm (2.6 in)
1985	16.8 mm (0.7 in)
1986	19.8 mm (0.8 in)
1987	19.8 mm (0.8 in)
1988	14.0 mm (0.6 in)
1989	5.8 mm (0.23 in)
1990	15.7 mm (0.6 in)
1991	33.8 mm (1.3 in)
1992	64.3 mm (2.5 in)
1993	19.3 mm (0.8 in)
1994	119.4 mm (4.7 in)
1995	23.4 mm (0.9 in)
1996	18.8 mm (0.7 in)
1997	32.8 mm (1.3 in)
1998	24.9 mm (1.0 in)
1999	21.8 mm (0.9 in)
2000	26.9 mm (1.1 in)
2001	10.9 mm (0.4 in)
2002	15.0 mm (0.6 in)
2003	34.8 mm (1.4 in)
2004	83.8 mm (3.3 in)
2005	13.5 mm (0.5 in)
2006	129.8 mm (5.1 in)
2007	24.9 mm (1.0 in)
2008	89.9 mm (3.5 in)
2009	159.8 mm (6.3 in)
2010	15.0 mm (0.6 in)
2011	5.3 mm (0.21 in)
2012	18.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Guillermo Prieto, 1979 to 2012. The record is 217.5 mm (8.6 in) in 2009, marked on the chart; the median year is 24.5 mm (1.0 in).

Wettest five days (Rx5day) at Guillermo Prieto by year
Year	Wettest five days (Rx5day)
1979	2.8 mm (0.11 in)
1980	15.0 mm (0.6 in)
1981	22.3 mm (0.9 in)
1982	40.7 mm (1.6 in)
1983	95.5 mm (3.8 in)
1984	67.6 mm (2.7 in)
1985	18.6 mm (0.7 in)
1986	19.8 mm (0.8 in)
1987	21.6 mm (0.9 in)
1988	14.0 mm (0.6 in)
1989	5.8 mm (0.23 in)
1990	18.5 mm (0.7 in)
1991	35.6 mm (1.4 in)
1992	64.3 mm (2.5 in)
1993	24.1 mm (0.9 in)
1994	160.8 mm (6.3 in)
1995	29.8 mm (1.2 in)
1996	25.7 mm (1.0 in)
1997	58.2 mm (2.3 in)
1998	26.2 mm (1.0 in)
1999	21.8 mm (0.9 in)
2000	26.9 mm (1.1 in)
2001	10.9 mm (0.4 in)
2002	16.3 mm (0.6 in)
2003	56.6 mm (2.2 in)
2004	83.8 mm (3.3 in)
2005	22.1 mm (0.9 in)
2006	149.6 mm (5.9 in)
2007	24.9 mm (1.0 in)
2008	105.6 mm (4.2 in)
2009	217.5 mm (8.6 in)
2010	20.4 mm (0.8 in)
2011	9.6 mm (0.38 in)
2012	21.6 mm (0.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Guillermo Prieto, 1979 to 2012. The record is 296 days in 2010, marked on the chart; the median year is 143 days.

Longest dry spell (CDD) at Guillermo Prieto by year
Year	Longest dry spell (CDD)
1979	84 days
1980	244 days
1981	138 days
1982	113 days
1983	115 days
1984	114 days
1985	80 days
1986	124 days
1987	293 days
1988	186 days
1989	99 days
1990	74 days
1991	75 days
1992	92 days
1993	186 days
1994	143 days
1995	127 days
1996	113 days
1997	142 days
1998	152 days
1999	151 days
2000	164 days
2001	88 days
2002	229 days
2003	222 days
2004	103 days
2005	138 days
2006	239 days
2007	150 days
2008	202 days
2009	204 days
2010	296 days
2011	154 days
2012	149 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 Guillermo Prieto standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Guillermo Prieto 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).