Las Bayas Weather Records (MXN00010040)

Record envelope, standing records and threshold days for Las Bayas (MXN00010040), Mexico, with 45 years of record.

Key Facts for Las Bayas

Las Bayas (MXN00010040) is a weather station in Mexico at 23.50 latitude and -104.82 longitude, 2,643 m (8,671 ft) above sea level.
The station reports from 1963 to 2007, 45 years of record.
1,464 records set at Las Bayas still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Las Bayas set a daily record low maximum temperature of 13.9 C (57.0 F) on 30 July 2007.

About the Station

Location: Mexico, 23.50 latitude, -104.82 longitude.
Elevation: 2,643 m (8,671 ft).
Period of record: 1963 to 2007, 45 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 Las Bayas. 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 Las Bayas, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.6 C (87.1 F)	-13.3 C (8.1 F)	n/a	n/a
Feb	30.6 C (87.1 F)	-15.0 C (5.0 F)	n/a	n/a
Mar	31.7 C (89.1 F)	-13.3 C (8.1 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-10.0 C (14.0 F)	n/a	n/a
May	37.8 C (100.0 F)	-10.0 C (14.0 F)	n/a	n/a
Jun	33.9 C (93.0 F)	-10.0 C (14.0 F)	n/a	n/a
Jul	35.0 C (95.0 F)	-9.4 C (15.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	-9.4 C (15.1 F)	n/a	n/a
Sep	28.9 C (84.0 F)	-9.4 C (15.1 F)	n/a	n/a
Oct	28.9 C (84.0 F)	-10.0 C (14.0 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-11.1 C (12.0 F)	n/a	n/a
Dec	26.7 C (80.1 F)	-11.1 C (12.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Las Bayas still stand. 1999 holds the most, with 84.

Standing records at Las Bayas by the year they were set
Year set	Standing records
1963	14
1964	41
1965	49
1966	22
1967	33
1968	40
1969	34
1970	25
1971	19
1972	39
1973	21
1974	68
1975	15
1976	58
1977	59
1978	42
1979	7
1980	69
1981	9
1982	1
1983	4
1984	24
1985	9
1986	9
1987	11
1988	40
1989	21
1990	2
1991	43
1992	49
1993	42
1994	37
1995	28
1996	8
1997	76
1998	65
1999	84
2000	12
2001	35
2002	36
2003	28
2004	61
2005	22
2006	40
2007	13

All-Time Record Progression

1 new records

1 all-time records were set at Las Bayas between 10 May 1998 and 10 May 1998. Each dot is a new record.

Wettest Day of Each Month

Nov: 159.8 mm (6.3 in)

The wettest day on record for each calendar month at Las Bayas. The most was 159.8 mm (6.3 in) on 23 November 1972.

Record daily precipitation for each month at Las Bayas
Month	Record daily precipitation (mm)	Date
Jan	68.8 mm (2.7 in)	3 January 1972
Feb	62.0 mm (2.4 in)	5 February 2005
Mar	47.8 mm (1.9 in)	1 March 2001
Apr	37.8 mm (1.5 in)	13 April 1997
May	25.9 mm (1.0 in)	24 May 1967
Jun	64.8 mm (2.6 in)	11 June 1984
Jul	100.8 mm (4.0 in)	27 July 1973
Aug	79.0 mm (3.1 in)	13 August 1990
Sep	135.9 mm (5.4 in)	12 September 1968
Oct	83.8 mm (3.3 in)	13 October 1994
Nov	159.8 mm (6.3 in)	23 November 1972
Dec	99.8 mm (3.9 in)	25 December 1974

Period of Record Coverage

1963 to 2007

45 years of record at Las Bayas, 1963 to 2007. 15 years have data for under 90 percent of days and are left out of rankings: 1963, 1973, 1981, 1982, 1983, 1985, 1986, 1987 and others.

Days with data per year at Las Bayas
Year	Days with data	Share of year	Complete
1963	45	12%	No
1964	365	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	362	99%	Yes
1970	364	100%	Yes
1971	362	99%	Yes
1972	366	100%	Yes
1973	303	83%	No
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	335	92%	Yes
1981	243	67%	No
1982	31	8%	No
1983	62	17%	No
1984	335	92%	Yes
1985	303	83%	No
1986	266	73%	No
1987	122	33%	No
1988	303	83%	No
1989	361	99%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	364	99%	Yes
1993	334	92%	Yes
1994	335	92%	Yes
1995	365	100%	Yes
1996	274	75%	No
1997	349	96%	Yes
1998	330	90%	Yes
1999	181	50%	No
2000	61	17%	No
2001	301	82%	No
2002	363	99%	Yes
2003	337	92%	Yes
2004	366	100%	Yes
2005	304	83%	No
2006	364	100%	Yes
2007	209	57%	No

Latest Records

Latest records at Las Bayas
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 July 2007	Las Bayas, MX	daily low max	13.9 C (57.0 F)	1.7 C (3.1 F)	2 years	9 of 100 (Routine)
29 July 2007	Las Bayas, MX	daily low max	15.6 C (60.1 F)	1.1 C (2.0 F)	9 years	9 of 100 (Routine)
28 July 2007	Las Bayas, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	30 years	3 of 100 (Routine)
23 July 2007	Las Bayas, MX	daily low max (Tie)	17.8 C (64.0 F)	tie	30 years	3 of 100 (Routine)
19 July 2007	Las Bayas, MX	daily low max (Tie)	16.7 C (62.1 F)	tie	30 years	3 of 100 (Routine)
6 July 2007	Las Bayas, MX	daily rain	48.3 mm (1.9 in)	8.4 mm (0.33 in)	37 years	23 of 100 (Routine)
24 June 2007	Las Bayas, MX	monthly low max	10.6 C (51.1 F)	1.1 C (2.0 F)	10 years	20 of 100 (Routine)
23 June 2007	Las Bayas, MX	monthly low max (Tie)	11.7 C (53.1 F)	tie	10 years	4 of 100 (Routine)
22 June 2007	Las Bayas, MX	daily low max	12.8 C (55.0 F)	2.2 C (4.0 F)	36 years	20 of 100 (Routine)
21 June 2007	Las Bayas, MX	monthly low max (Tie)	11.7 C (53.1 F)	tie	10 years	4 of 100 (Routine)
16 June 2007	Las Bayas, MX	daily low max	17.8 C (64.0 F)	1.1 C (2.0 F)	28 years	15 of 100 (Routine)
20 February 2007	Las Bayas, MX	daily low max	12.8 C (55.0 F)	2.2 C (4.0 F)	43 years	21 of 100 (Routine)
14 February 2007	Las Bayas, MX	daily low max	6.7 C (44.1 F)	2.2 C (4.0 F)	37 years	20 of 100 (Routine)
8 February 2007	Las Bayas, MX	daily low max (Tie)	7.8 C (46.0 F)	tie	5 years	1 of 100 (Routine)
31 January 2007	Las Bayas, MX	daily high min (Tie)	1.7 C (35.1 F)	tie	29 years	3 of 100 (Routine)
26 January 2007	Las Bayas, MX	daily low max (Tie)	8.9 C (48.0 F)	tie	15 years	2 of 100 (Routine)
23 January 2007	Las Bayas, MX	daily low max	5.0 C (41.0 F)	1.7 C (3.1 F)	1 year	8 of 100 (Routine)
22 January 2007	Las Bayas, MX	daily low max (Tie)	6.7 C (44.1 F)	tie	1 year	1 of 100 (Routine)
21 January 2007	Las Bayas, MX	daily low max	5.6 C (42.1 F)	2.2 C (4.0 F)	41 years	21 of 100 (Routine)
20 January 2007	Las Bayas, MX	daily low max	5.0 C (41.0 F)	1.7 C (3.1 F)	3 years	8 of 100 (Routine)

Climate Trend

20 complete years, 1964 to 1995

One stripe for each of 20 complete years at Las Bayas, 1964 to 1995. Blue stripes are years cooler than the station's own mean of 11.2 C (52.1 F); red stripes are warmer. The coolest year was 1976, at 8.8 C (47.8 F), and the warmest was 1989, at 12.8 C (55.0 F). The strongest colour marks a difference of 2.4 C (4.3 F).

Annual mean temperature at Las Bayas as warming stripes, 1964 to 1995
Year	Annual mean temperature	Difference from the station mean
1964	10.4 C	-0.73 C
1965	10.6 C	-0.53 C
1966	10.9 C	-0.27 C
1967	11.0 C	-0.11 C
1968	10.9 C	-0.27 C
1969	11.6 C	+0.45 C
1970	11.1 C	-0.04 C
1971	11.5 C	+0.38 C
1972	11.8 C	+0.68 C
1974	11.4 C	+0.24 C
1975	11.4 C	+0.20 C
1976	8.8 C	-2.37 C
1977	10.5 C	-0.69 C
1978	10.5 C	-0.66 C
1979	10.6 C	-0.58 C
1989	12.8 C	+1.62 C
1990	10.9 C	-0.25 C
1991	12.2 C	+1.00 C
1992	11.7 C	+0.54 C
1995	12.6 C	+1.40 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

1963 to 2007

Yearly extremes at Las Bayas: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.8 C (100.0 F)	1998	28.9 C (84.0 F)	45
Coldest night (TNn)	-15.0 C (5.0 F)	1974	-9.4 C (15.1 F)	45
Wettest day (Rx1day)	159.8 mm (6.3 in)	1972	47.8 mm (1.9 in)	45
Wettest five days (Rx5day)	203.3 mm (8.0 in)	1999	107.4 mm (4.2 in)	45
Longest dry spell (CDD)	135 days	1977	63 days	45

Hottest day (TXx)

The hottest day of the year at Las Bayas, 1963 to 2007. The record is 37.8 C (100.0 F) in 1998, marked on the chart; the median year is 28.9 C (84.0 F).

Hottest day (TXx) at Las Bayas by year
Year	Hottest day (TXx)
1963	27.8 C (82.0 F)
1964	28.9 C (84.0 F)
1965	31.7 C (89.1 F)
1966	30.6 C (87.1 F)
1967	30.6 C (87.1 F)
1968	30.0 C (86.0 F)
1969	32.8 C (91.0 F)
1970	30.0 C (86.0 F)
1971	28.9 C (84.0 F)
1972	31.7 C (89.1 F)
1973	32.8 C (91.0 F)
1974	31.7 C (89.1 F)
1975	30.0 C (86.0 F)
1976	25.6 C (78.1 F)
1977	31.7 C (89.1 F)
1978	30.0 C (86.0 F)
1979	28.9 C (84.0 F)
1980	28.9 C (84.0 F)
1981	28.9 C (84.0 F)
1982	23.9 C (75.0 F)
1983	22.2 C (72.0 F)
1984	25.6 C (78.1 F)
1985	26.7 C (80.1 F)
1986	27.2 C (81.0 F)
1987	26.7 C (80.1 F)
1988	28.9 C (84.0 F)
1989	30.0 C (86.0 F)
1990	25.0 C (77.0 F)
1991	30.0 C (86.0 F)
1992	28.9 C (84.0 F)
1993	30.0 C (86.0 F)
1994	33.9 C (93.0 F)
1995	30.0 C (86.0 F)
1996	27.8 C (82.0 F)
1997	28.9 C (84.0 F)
1998	37.8 C (100.0 F)
1999	33.9 C (93.0 F)
2000	23.9 C (75.0 F)
2001	32.8 C (91.0 F)
2002	27.8 C (82.0 F)
2003	30.0 C (86.0 F)
2004	28.9 C (84.0 F)
2005	26.7 C (80.1 F)
2006	25.6 C (78.1 F)
2007	27.2 C (81.0 F)

Coldest night (TNn)

The coldest night of the year at Las Bayas, 1963 to 2007. The record is -15.0 C (5.0 F) in 1974, marked on the chart; the median year is -9.4 C (15.1 F).

Coldest night (TNn) at Las Bayas by year
Year	Coldest night (TNn)
1963	-9.4 C (15.1 F)
1964	-12.2 C (10.0 F)
1965	-12.2 C (10.0 F)
1966	-10.0 C (14.0 F)
1967	-10.0 C (14.0 F)
1968	-9.4 C (15.1 F)
1969	-7.2 C (19.0 F)
1970	-11.1 C (12.0 F)
1971	-10.0 C (14.0 F)
1972	-10.0 C (14.0 F)
1973	-13.3 C (8.1 F)
1974	-15.0 C (5.0 F)
1975	-11.1 C (12.0 F)
1976	-13.3 C (8.1 F)
1977	-9.4 C (15.1 F)
1978	-9.4 C (15.1 F)
1979	-10.0 C (14.0 F)
1980	-6.1 C (21.0 F)
1981	-9.4 C (15.1 F)
1982	-5.0 C (23.0 F)
1983	1.1 C (34.0 F)
1984	-11.1 C (12.0 F)
1985	-9.4 C (15.1 F)
1986	-7.2 C (19.0 F)
1987	-3.3 C (26.1 F)
1988	-9.4 C (15.1 F)
1989	-11.1 C (12.0 F)
1990	-11.1 C (12.0 F)
1991	-6.7 C (19.9 F)
1992	-5.0 C (23.0 F)
1993	-9.4 C (15.1 F)
1994	-8.3 C (17.1 F)
1995	-8.3 C (17.1 F)
1996	-8.3 C (17.1 F)
1997	-9.4 C (15.1 F)
1998	-12.2 C (10.0 F)
1999	-7.2 C (19.0 F)
2000	-9.4 C (15.1 F)
2001	-10.0 C (14.0 F)
2002	-9.4 C (15.1 F)
2003	-10.0 C (14.0 F)
2004	-10.0 C (14.0 F)
2005	-10.0 C (14.0 F)
2006	-9.4 C (15.1 F)
2007	-6.1 C (21.0 F)

Wettest day (Rx1day)

The wettest day of the year at Las Bayas, 1963 to 2007. The record is 159.8 mm (6.3 in) in 1972, marked on the chart; the median year is 47.8 mm (1.9 in).

Wettest day (Rx1day) at Las Bayas by year
Year	Wettest day (Rx1day)
1963	55.6 mm (2.2 in)
1964	53.3 mm (2.1 in)
1965	43.9 mm (1.7 in)
1966	64.8 mm (2.6 in)
1967	47.0 mm (1.9 in)
1968	135.9 mm (5.4 in)
1969	79.8 mm (3.1 in)
1970	51.8 mm (2.0 in)
1971	41.9 mm (1.6 in)
1972	159.8 mm (6.3 in)
1973	100.8 mm (4.0 in)
1974	99.8 mm (3.9 in)
1975	63.0 mm (2.5 in)
1976	73.9 mm (2.9 in)
1977	30.0 mm (1.2 in)
1978	30.0 mm (1.2 in)
1979	30.0 mm (1.2 in)
1980	23.9 mm (0.9 in)
1981	34.8 mm (1.4 in)
1982	8.9 mm (0.35 in)
1983	46.0 mm (1.8 in)
1984	69.9 mm (2.8 in)
1985	53.8 mm (2.1 in)
1986	41.4 mm (1.6 in)
1987	47.8 mm (1.9 in)
1988	37.8 mm (1.5 in)
1989	36.8 mm (1.4 in)
1990	79.0 mm (3.1 in)
1991	52.1 mm (2.1 in)
1992	63.5 mm (2.5 in)
1993	45.0 mm (1.8 in)
1994	83.8 mm (3.3 in)
1995	63.8 mm (2.5 in)
1996	35.8 mm (1.4 in)
1997	39.9 mm (1.6 in)
1998	47.8 mm (1.9 in)
1999	65.8 mm (2.6 in)
2000	7.9 mm (0.31 in)
2001	56.1 mm (2.2 in)
2002	46.5 mm (1.8 in)
2003	39.9 mm (1.6 in)
2004	45.2 mm (1.8 in)
2005	62.0 mm (2.4 in)
2006	46.5 mm (1.8 in)
2007	48.3 mm (1.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at Las Bayas, 1963 to 2007. The record is 203.3 mm (8.0 in) in 1999, marked on the chart; the median year is 107.4 mm (4.2 in).

Wettest five days (Rx5day) at Las Bayas by year
Year	Wettest five days (Rx5day)
1963	108.8 mm (4.3 in)
1964	99.3 mm (3.9 in)
1965	109.4 mm (4.3 in)
1966	97.6 mm (3.8 in)
1967	114.4 mm (4.5 in)
1968	195.4 mm (7.7 in)
1969	106.5 mm (4.2 in)
1970	138.4 mm (5.4 in)
1971	99.4 mm (3.9 in)
1972	194.3 mm (7.6 in)
1973	124.3 mm (4.9 in)
1974	195.4 mm (7.7 in)
1975	127.5 mm (5.0 in)
1976	140.7 mm (5.5 in)
1977	99.3 mm (3.9 in)
1978	71.5 mm (2.8 in)
1979	87.4 mm (3.4 in)
1980	95.1 mm (3.7 in)
1981	98.3 mm (3.9 in)
1982	15.3 mm (0.6 in)
1983	107.4 mm (4.2 in)
1984	127.0 mm (5.0 in)
1985	137.4 mm (5.4 in)
1986	152.4 mm (6.0 in)
1987	110.9 mm (4.4 in)
1988	108.3 mm (4.3 in)
1989	51.3 mm (2.0 in)
1990	146.3 mm (5.8 in)
1991	136.9 mm (5.4 in)
1992	113.3 mm (4.5 in)
1993	88.7 mm (3.5 in)
1994	97.3 mm (3.8 in)
1995	123.2 mm (4.9 in)
1996	71.5 mm (2.8 in)
1997	121.2 mm (4.8 in)
1998	84.1 mm (3.3 in)
1999	203.3 mm (8.0 in)
2000	14.0 mm (0.6 in)
2001	149.9 mm (5.9 in)
2002	93.2 mm (3.7 in)
2003	106.8 mm (4.2 in)
2004	105.2 mm (4.1 in)
2005	102.9 mm (4.1 in)
2006	93.2 mm (3.7 in)
2007	81.6 mm (3.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Las Bayas, 1963 to 2007. The record is 135 days in 1977, marked on the chart; the median year is 63 days.

Longest dry spell (CDD) at Las Bayas by year
Year	Longest dry spell (CDD)
1963	12 days
1964	63 days
1965	84 days
1966	45 days
1967	60 days
1968	46 days
1969	94 days
1970	57 days
1971	92 days
1972	63 days
1973	53 days
1974	73 days
1975	125 days
1976	92 days
1977	135 days
1978	121 days
1979	118 days
1980	69 days
1981	47 days
1982	11 days
1983	13 days
1984	64 days
1985	61 days
1986	57 days
1987	28 days
1988	55 days
1989	71 days
1990	42 days
1991	110 days
1992	27 days
1993	42 days
1994	87 days
1995	74 days
1996	70 days
1997	35 days
1998	50 days
1999	59 days
2000	33 days
2001	61 days
2002	68 days
2003	72 days
2004	31 days
2005	81 days
2006	78 days
2007	73 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.

Frost Dates and Growing Season

20 years with a frost

Across 20 years with a frost, the median last spring frost at Las Bayas falls on 16 May and the median first autumn frost on 13 October, which leaves a median of 141 days between them.

Frost dates and growing season at Las Bayas
Measure	Median, all years	Earliest period	Recent period (1964 to 1995)	Recent against earliest	Fitted trend
Last spring frost	16 May	n/a	16 May	n/a	n/a
First autumn frost	13 October	n/a	13 October	n/a	n/a
Growing days	141 days	n/a	141 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

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