San Bernardo Weather Records (MXN00010138)

Record envelope, standing records and threshold days for San Bernardo (MXN00010138), Mexico, with 33 years of record.

Key Facts for San Bernardo

San Bernardo (MXN00010138) is a weather station in Mexico at 26.00 latitude and -105.52 longitude, 1,640 m (5,380 ft) above sea level.
The station reports from 1977 to 2009, 33 years of record.
1,464 records set at San Bernardo still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
San Bernardo tied a daily record high minimum temperature of 6.7 C (44.1 F) on 23 January 2009.

About the Station

Location: Mexico, 26.00 latitude, -105.52 longitude.
Elevation: 1,640 m (5,380 ft).
Period of record: 1977 to 2009, 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 Bernardo. 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 Bernardo, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.7 C (89.1 F)	-10.0 C (14.0 F)	n/a	n/a
Feb	36.7 C (98.1 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	36.7 C (98.1 F)	-6.1 C (21.0 F)	n/a	n/a
Apr	40.0 C (104.0 F)	-4.4 C (24.1 F)	n/a	n/a
May	41.7 C (107.1 F)	5.0 C (41.0 F)	n/a	n/a
Jun	43.9 C (111.0 F)	5.6 C (42.1 F)	n/a	n/a
Jul	42.8 C (109.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	10.6 C (51.1 F)	n/a	n/a
Sep	38.9 C (102.0 F)	2.8 C (37.0 F)	n/a	n/a
Oct	37.8 C (100.0 F)	-1.1 C (30.0 F)	n/a	n/a
Nov	33.9 C (93.0 F)	-8.3 C (17.1 F)	n/a	n/a
Dec	31.7 C (89.1 F)	-14.4 C (6.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at San Bernardo still stand. 1978 holds the most, with 110.

Standing records at San Bernardo by the year they were set
Year set	Standing records
1977	64
1978	110
1979	110
1980	103
1981	79
1982	55
1983	45
1984	56
1985	8
1986	41
1987	54
1988	25
1989	66
1990	43
1991	42
1992	64
1993	34
1994	44
1995	26
1996	26
1997	54
1998	27
1999	16
2000	30
2001	38
2002	30
2003	27
2004	40
2005	21
2006	22
2007	25
2008	39

Wettest Day of Each Month

Jun: 97.8 mm (3.9 in)

The wettest day on record for each calendar month at San Bernardo. The most was 97.8 mm (3.9 in) on 20 June 1988.

Record daily precipitation for each month at San Bernardo
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	29 January 1984
Feb	75.9 mm (3.0 in)	20 February 1991
Mar	66.8 mm (2.6 in)	14 March 1994
Apr	30.0 mm (1.2 in)	17 April 1994
May	31.8 mm (1.3 in)	14 May 2002
Jun	97.8 mm (3.9 in)	20 June 1988
Jul	75.7 mm (3.0 in)	23 July 1986
Aug	85.9 mm (3.4 in)	1 August 1979
Sep	81.8 mm (3.2 in)	12 September 1993
Oct	41.9 mm (1.6 in)	6 October 2005
Nov	34.8 mm (1.4 in)	19 November 1989
Dec	91.9 mm (3.6 in)	22 December 1994

Period of Record Coverage

1977 to 2009

33 years of record at San Bernardo, 1977 to 2009. 5 years have data for under 90 percent of days and are left out of rankings: 1977, 1985, 1992, 1996, 2009.

Days with data per year at San Bernardo
Year	Days with data	Share of year	Complete
1977	122	33%	No
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	363	99%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	59	16%	No
1986	365	100%	Yes
1987	365	100%	Yes
1988	365	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	333	91%	Yes
1992	304	83%	No
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	304	83%	No
1997	364	100%	Yes
1998	364	100%	Yes
1999	364	100%	Yes
2000	365	100%	Yes
2001	334	92%	Yes
2002	360	99%	Yes
2003	362	99%	Yes
2004	365	100%	Yes
2005	333	91%	Yes
2006	362	99%	Yes
2007	331	91%	Yes
2008	332	91%	Yes
2009	30	8%	No

Latest Records

Latest records at San Bernardo
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 January 2009	San Bernardo, MX	daily high min (Tie)	6.7 C (44.1 F)	tie	4 years	1 of 100 (Routine)
10 January 2009	San Bernardo, MX	daily high max (Tie)	26.7 C (80.1 F)	tie	4 years	1 of 100 (Routine)

Climate Trend

23 complete years, 1978 to 2006

One stripe for each of 23 complete years at San Bernardo, 1978 to 2006. Blue stripes are years cooler than the station's own mean of 18.3 C (65.0 F); red stripes are warmer. The coolest year was 1987, at 16.9 C (62.5 F), and the warmest was 1994, at 19.4 C (66.9 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at San Bernardo as warming stripes, 1978 to 2006
Year	Annual mean temperature	Difference from the station mean
1978	18.9 C	+0.50 C
1979	18.3 C	-0.02 C
1980	18.9 C	+0.51 C
1981	18.4 C	+0.05 C
1982	19.2 C	+0.87 C
1983	18.4 C	+0.08 C
1984	17.6 C	-0.72 C
1986	17.8 C	-0.54 C
1987	16.9 C	-1.41 C
1988	18.0 C	-0.31 C
1989	18.3 C	-0.04 C
1990	18.3 C	-0.10 C
1993	19.1 C	+0.73 C
1994	19.4 C	+1.06 C
1995	19.2 C	+0.87 C
1997	17.4 C	-0.97 C
1998	18.7 C	+0.38 C
1999	18.3 C	-0.03 C
2000	18.4 C	+0.06 C
2002	18.3 C	-0.07 C
2003	18.2 C	-0.18 C
2004	17.6 C	-0.76 C
2006	18.4 C	+0.04 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

1977 to 2009

Yearly extremes at San Bernardo: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1992	38.9 C (102.0 F)	33
Coldest night (TNn)	-14.4 C (6.1 F)	1997	-6.1 C (21.0 F)	33
Wettest day (Rx1day)	97.8 mm (3.9 in)	1988	53.3 mm (2.1 in)	33
Wettest five days (Rx5day)	237.3 mm (9.3 in)	1988	81.8 mm (3.2 in)	33
Longest dry spell (CDD)	162 days	1995	83 days	33

Hottest day (TXx)

The hottest day of the year at San Bernardo, 1977 to 2009. The record is 43.9 C (111.0 F) in 1992, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at San Bernardo by year
Year	Hottest day (TXx)
1977	38.9 C (102.0 F)
1978	40.6 C (105.1 F)
1979	40.0 C (104.0 F)
1980	42.8 C (109.0 F)
1981	40.6 C (105.1 F)
1982	41.7 C (107.1 F)
1983	40.0 C (104.0 F)
1984	37.8 C (100.0 F)
1985	28.9 C (84.0 F)
1986	37.8 C (100.0 F)
1987	40.0 C (104.0 F)
1988	38.9 C (102.0 F)
1989	41.7 C (107.1 F)
1990	40.6 C (105.1 F)
1991	41.7 C (107.1 F)
1992	43.9 C (111.0 F)
1993	38.9 C (102.0 F)
1994	40.0 C (104.0 F)
1995	40.0 C (104.0 F)
1996	40.6 C (105.1 F)
1997	37.8 C (100.0 F)
1998	40.6 C (105.1 F)
1999	38.9 C (102.0 F)
2000	36.7 C (98.1 F)
2001	37.8 C (100.0 F)
2002	38.9 C (102.0 F)
2003	38.9 C (102.0 F)
2004	36.7 C (98.1 F)
2005	38.9 C (102.0 F)
2006	37.8 C (100.0 F)
2007	35.6 C (96.1 F)
2008	37.8 C (100.0 F)
2009	26.7 C (80.1 F)

Coldest night (TNn)

The coldest night of the year at San Bernardo, 1977 to 2009. The record is -14.4 C (6.1 F) in 1997, marked on the chart; the median year is -6.1 C (21.0 F).

Coldest night (TNn) at San Bernardo by year
Year	Coldest night (TNn)
1977	-3.3 C (26.1 F)
1978	-6.1 C (21.0 F)
1979	-8.3 C (17.1 F)
1980	-8.3 C (17.1 F)
1981	-5.0 C (23.0 F)
1982	-6.1 C (21.0 F)
1983	-6.1 C (21.0 F)
1984	-5.0 C (23.0 F)
1985	-7.2 C (19.0 F)
1986	-6.1 C (21.0 F)
1987	-7.2 C (19.0 F)
1988	-8.3 C (17.1 F)
1989	-6.1 C (21.0 F)
1990	-8.3 C (17.1 F)
1991	-5.0 C (23.0 F)
1992	-6.1 C (21.0 F)
1993	-4.4 C (24.1 F)
1994	-9.4 C (15.1 F)
1995	-4.4 C (24.1 F)
1996	-7.2 C (19.0 F)
1997	-14.4 C (6.1 F)
1998	-6.1 C (21.0 F)
1999	-7.2 C (19.0 F)
2000	-8.3 C (17.1 F)
2001	-4.4 C (24.1 F)
2002	-6.1 C (21.0 F)
2003	-9.4 C (15.1 F)
2004	-8.3 C (17.1 F)
2005	-6.1 C (21.0 F)
2006	-10.0 C (14.0 F)
2007	-5.0 C (23.0 F)
2008	-8.3 C (17.1 F)
2009	-4.4 C (24.1 F)

Wettest day (Rx1day)

The wettest day of the year at San Bernardo, 1977 to 2009. The record is 97.8 mm (3.9 in) in 1988, marked on the chart; the median year is 53.3 mm (2.1 in).

Wettest day (Rx1day) at San Bernardo by year
Year	Wettest day (Rx1day)
1977	26.9 mm (1.1 in)
1978	40.9 mm (1.6 in)
1979	85.9 mm (3.4 in)
1980	71.9 mm (2.8 in)
1981	40.4 mm (1.6 in)
1982	31.8 mm (1.3 in)
1983	29.5 mm (1.2 in)
1984	62.0 mm (2.4 in)
1985	29.0 mm (1.1 in)
1986	75.7 mm (3.0 in)
1987	73.2 mm (2.9 in)
1988	97.8 mm (3.9 in)
1989	63.0 mm (2.5 in)
1990	53.3 mm (2.1 in)
1991	75.9 mm (3.0 in)
1992	37.3 mm (1.5 in)
1993	81.8 mm (3.2 in)
1994	91.9 mm (3.6 in)
1995	69.6 mm (2.7 in)
1996	44.5 mm (1.8 in)
1997	68.6 mm (2.7 in)
1998	45.0 mm (1.8 in)
1999	43.4 mm (1.7 in)
2000	50.3 mm (2.0 in)
2001	25.4 mm (1.0 in)
2002	34.3 mm (1.4 in)
2003	56.9 mm (2.2 in)
2004	41.4 mm (1.6 in)
2005	41.9 mm (1.6 in)
2006	57.9 mm (2.3 in)
2007	63.0 mm (2.5 in)
2008	55.9 mm (2.2 in)
2009	0.3 mm (0.01 in)

Wettest five days (Rx5day)

The wettest five days of the year at San Bernardo, 1977 to 2009. The record is 237.3 mm (9.3 in) in 1988, marked on the chart; the median year is 81.8 mm (3.2 in).

Wettest five days (Rx5day) at San Bernardo by year
Year	Wettest five days (Rx5day)
1977	26.9 mm (1.1 in)
1978	87.9 mm (3.5 in)
1979	128.1 mm (5.0 in)
1980	118.4 mm (4.7 in)
1981	70.0 mm (2.8 in)
1982	47.3 mm (1.9 in)
1983	56.3 mm (2.2 in)
1984	111.2 mm (4.4 in)
1985	37.3 mm (1.5 in)
1986	107.2 mm (4.2 in)
1987	138.3 mm (5.4 in)
1988	237.3 mm (9.3 in)
1989	101.9 mm (4.0 in)
1990	63.1 mm (2.5 in)
1991	107.7 mm (4.2 in)
1992	57.6 mm (2.3 in)
1993	108.4 mm (4.3 in)
1994	172.7 mm (6.8 in)
1995	90.5 mm (3.6 in)
1996	107.5 mm (4.2 in)
1997	81.8 mm (3.2 in)
1998	79.7 mm (3.1 in)
1999	67.6 mm (2.7 in)
2000	76.2 mm (3.0 in)
2001	58.2 mm (2.3 in)
2002	45.0 mm (1.8 in)
2003	78.7 mm (3.1 in)
2004	81.8 mm (3.2 in)
2005	120.9 mm (4.8 in)
2006	141.0 mm (5.6 in)
2007	113.2 mm (4.5 in)
2008	68.9 mm (2.7 in)
2009	0.3 mm (0.01 in)

Longest dry spell (CDD)

The longest dry spell of the year at San Bernardo, 1977 to 2009. The record is 162 days in 1995, marked on the chart; the median year is 83 days.

Longest dry spell (CDD) at San Bernardo by year
Year	Longest dry spell (CDD)
1977	66 days
1978	59 days
1979	60 days
1980	100 days
1981	52 days
1982	101 days
1983	76 days
1984	28 days
1985	41 days
1986	83 days
1987	98 days
1988	94 days
1989	87 days
1990	151 days
1991	108 days
1992	72 days
1993	103 days
1994	72 days
1995	162 days
1996	159 days
1997	38 days
1998	77 days
1999	143 days
2000	141 days
2001	51 days
2002	91 days
2003	75 days
2004	45 days
2005	154 days
2006	134 days
2007	82 days
2008	117 days
2009	31 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

23 years with a frost

Across 23 years with a frost, the median last spring frost at San Bernardo falls on 10 March and the median first autumn frost on 14 November, which leaves a median of 247 days between them.

Frost dates and growing season at San Bernardo
Measure	Median, all years	Earliest period	Recent period (1978 to 2006)	Recent against earliest	Fitted trend
Last spring frost	10 March	n/a	10 March	n/a	n/a
First autumn frost	14 November	n/a	14 November	n/a	n/a
Growing days	247 days	n/a	247 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 San Bernardo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Bernardo 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).