La Reforma Weather Records (MXN00028193)

Record envelope, standing records and threshold days for La Reforma (MXN00028193), Mexico, with 30 years of record.

Key Facts for La Reforma

La Reforma (MXN00028193) is a weather station in Mexico at 23.62 latitude and -99.30 longitude, 777 m (2,549 ft) above sea level.
The station reports from 1980 to 2009, 30 years of record.
1,464 records set at La Reforma still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.

About the Station

Location: Mexico, 23.62 latitude, -99.30 longitude.
Elevation: 777 m (2,549 ft).
Period of record: 1980 to 2009, 30 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 La Reforma. 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 La Reforma, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	36.7 C (98.1 F)	-1.1 C (30.0 F)	n/a	n/a
Feb	40.0 C (104.0 F)	0.6 C (33.1 F)	n/a	n/a
Mar	41.7 C (107.1 F)	0.6 C (33.1 F)	n/a	n/a
Apr	45.0 C (113.0 F)	3.9 C (39.0 F)	n/a	n/a
May	46.7 C (116.1 F)	8.9 C (48.0 F)	n/a	n/a
Jun	42.8 C (109.0 F)	6.7 C (44.1 F)	n/a	n/a
Jul	45.0 C (113.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	42.8 C (109.0 F)	10.0 C (50.0 F)	n/a	n/a
Sep	40.6 C (105.1 F)	10.0 C (50.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a
Nov	38.9 C (102.0 F)	0.0 C (32.0 F)	n/a	n/a
Dec	38.9 C (102.0 F)	-7.2 C (19.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at La Reforma still stand. 1980 holds the most, with 190.

Standing records at La Reforma by the year they were set
Year set	Standing records
1980	190
1981	100
1982	48
1983	53
1984	69
1985	63
1986	43
1987	68
1988	48
1989	58
1990	64
1991	95
1992	40
1993	37
1994	34
1995	27
1996	36
1997	42
1998	31
1999	33
2000	29
2001	23
2002	27
2003	36
2004	27
2005	21
2006	43
2007	20
2008	36
2009	23

Wettest Day of Each Month

Sep: 140.0 mm (5.5 in)

The wettest day on record for each calendar month at La Reforma. The most was 140.0 mm (5.5 in) on 13 September 1990.

Record daily precipitation for each month at La Reforma
Month	Record daily precipitation (mm)	Date
Jan	33.8 mm (1.3 in)	30 January 1984
Feb	38.9 mm (1.5 in)	4 February 1991
Mar	35.8 mm (1.4 in)	31 March 2005
Apr	45.0 mm (1.8 in)	8 April 2003
May	63.0 mm (2.5 in)	14 May 1982
Jun	55.9 mm (2.2 in)	15 June 1981
Jul	104.9 mm (4.1 in)	8 July 2002
Aug	115.8 mm (4.6 in)	30 August 2003
Sep	140.0 mm (5.5 in)	13 September 1990
Oct	99.8 mm (3.9 in)	16 October 2009
Nov	28.4 mm (1.1 in)	17 November 1995
Dec	30.0 mm (1.2 in)	20 December 1988

Period of Record Coverage

1980 to 2009

30 years of record at La Reforma, 1980 to 2009. 1 years have data for under 90 percent of days and are left out of rankings: 1980.

Days with data per year at La Reforma
Year	Days with data	Share of year	Complete
1980	315	86%	No
1981	365	100%	Yes
1982	365	100%	Yes
1983	362	99%	Yes
1984	364	99%	Yes
1985	362	99%	Yes
1986	364	100%	Yes
1987	363	99%	Yes
1988	363	99%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	360	99%	Yes
1992	362	99%	Yes
1993	365	100%	Yes
1994	363	99%	Yes
1995	364	100%	Yes
1996	364	99%	Yes
1997	362	99%	Yes
1998	365	100%	Yes
1999	363	99%	Yes
2000	363	99%	Yes
2001	364	100%	Yes
2002	364	100%	Yes
2003	360	99%	Yes
2004	358	98%	Yes
2005	359	98%	Yes
2006	358	98%	Yes
2007	362	99%	Yes
2008	364	99%	Yes
2009	365	100%	Yes

Latest Records

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

Climate Trend

29 complete years, 1981 to 2009

One stripe for each of 29 complete years at La Reforma, 1981 to 2009. Blue stripes are years cooler than the station's own mean of 22.0 C (71.7 F); red stripes are warmer. The coolest year was 1991, at 21.1 C (70.0 F), and the warmest was 1981, at 24.0 C (75.2 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at La Reforma as warming stripes, 1981 to 2009
Year	Annual mean temperature	Difference from the station mean
1981	24.0 C	+1.98 C
1982	22.5 C	+0.46 C
1983	21.7 C	-0.37 C
1984	21.5 C	-0.55 C
1985	21.7 C	-0.35 C
1986	22.1 C	+0.07 C
1987	21.4 C	-0.68 C
1988	21.6 C	-0.47 C
1989	22.6 C	+0.55 C
1990	22.4 C	+0.36 C
1991	21.1 C	-0.92 C
1992	21.5 C	-0.50 C
1993	22.0 C	-0.02 C
1994	22.1 C	+0.04 C
1995	22.2 C	+0.15 C
1996	22.1 C	+0.03 C
1997	21.8 C	-0.28 C
1998	22.9 C	+0.82 C
1999	22.3 C	+0.21 C
2000	22.5 C	+0.41 C
2001	21.8 C	-0.25 C
2002	22.0 C	-0.04 C
2003	21.8 C	-0.24 C
2004	22.0 C	-0.06 C
2005	22.0 C	-0.08 C
2006	22.3 C	+0.30 C
2007	21.8 C	-0.24 C
2008	21.5 C	-0.51 C
2009	22.3 C	+0.22 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

1980 to 2009

Yearly extremes at La Reforma: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.7 C (116.1 F)	1998	41.7 C (107.1 F)	30
Coldest night (TNn)	-7.2 C (19.0 F)	1989	0.6 C (33.1 F)	30
Wettest day (Rx1day)	140.0 mm (5.5 in)	1990	57.9 mm (2.3 in)	30
Wettest five days (Rx5day)	188.4 mm (7.4 in)	2005	102.8 mm (4.0 in)	30
Longest dry spell (CDD)	365 days	1998	71 days	30

Hottest day (TXx)

The hottest day of the year at La Reforma, 1980 to 2009. The record is 46.7 C (116.1 F) in 1998, marked on the chart; the median year is 41.7 C (107.1 F).

Hottest day (TXx) at La Reforma by year
Year	Hottest day (TXx)
1980	45.0 C (113.0 F)
1981	42.8 C (109.0 F)
1982	42.8 C (109.0 F)
1983	43.9 C (111.0 F)
1984	45.0 C (113.0 F)
1985	40.6 C (105.1 F)
1986	41.7 C (107.1 F)
1987	40.6 C (105.1 F)
1988	41.7 C (107.1 F)
1989	42.8 C (109.0 F)
1990	40.0 C (104.0 F)
1991	41.7 C (107.1 F)
1992	42.8 C (109.0 F)
1993	40.0 C (104.0 F)
1994	40.0 C (104.0 F)
1995	40.6 C (105.1 F)
1996	41.7 C (107.1 F)
1997	38.9 C (102.0 F)
1998	46.7 C (116.1 F)
1999	42.8 C (109.0 F)
2000	41.7 C (107.1 F)
2001	38.9 C (102.0 F)
2002	40.6 C (105.1 F)
2003	41.7 C (107.1 F)
2004	40.0 C (104.0 F)
2005	40.6 C (105.1 F)
2006	38.9 C (102.0 F)
2007	40.0 C (104.0 F)
2008	40.0 C (104.0 F)
2009	41.7 C (107.1 F)

Coldest night (TNn)

The coldest night of the year at La Reforma, 1980 to 2009. The record is -7.2 C (19.0 F) in 1989, marked on the chart; the median year is 0.6 C (33.1 F).

Coldest night (TNn) at La Reforma by year
Year	Coldest night (TNn)
1980	0.6 C (33.1 F)
1981	5.6 C (42.1 F)
1982	-1.1 C (30.0 F)
1983	-5.0 C (23.0 F)
1984	0.0 C (32.0 F)
1985	0.6 C (33.1 F)
1986	0.0 C (32.0 F)
1987	0.0 C (32.0 F)
1988	0.0 C (32.0 F)
1989	-7.2 C (19.0 F)
1990	0.6 C (33.1 F)
1991	0.6 C (33.1 F)
1992	0.0 C (32.0 F)
1993	1.7 C (35.1 F)
1994	5.0 C (41.0 F)
1995	0.0 C (32.0 F)
1996	-2.2 C (28.0 F)
1997	0.0 C (32.0 F)
1998	3.9 C (39.0 F)
1999	1.7 C (35.1 F)
2000	0.6 C (33.1 F)
2001	2.8 C (37.0 F)
2002	1.7 C (35.1 F)
2003	0.6 C (33.1 F)
2004	1.7 C (35.1 F)
2005	2.8 C (37.0 F)
2006	0.6 C (33.1 F)
2007	3.9 C (39.0 F)
2008	0.0 C (32.0 F)
2009	1.7 C (35.1 F)

Wettest day (Rx1day)

The wettest day of the year at La Reforma, 1980 to 2009. The record is 140.0 mm (5.5 in) in 1990, marked on the chart; the median year is 57.9 mm (2.3 in).

Wettest day (Rx1day) at La Reforma by year
Year	Wettest day (Rx1day)
1980	31.8 mm (1.3 in)
1981	55.9 mm (2.2 in)
1982	63.0 mm (2.5 in)
1983	75.9 mm (3.0 in)
1984	33.8 mm (1.3 in)
1985	31.8 mm (1.3 in)
1986	68.8 mm (2.7 in)
1987	41.9 mm (1.6 in)
1988	64.8 mm (2.6 in)
1989	54.9 mm (2.2 in)
1990	140.0 mm (5.5 in)
1991	59.9 mm (2.4 in)
1992	63.0 mm (2.5 in)
1993	41.9 mm (1.6 in)
1994	24.9 mm (1.0 in)
1995	79.8 mm (3.1 in)
1996	99.8 mm (3.9 in)
1997	38.9 mm (1.5 in)
1998	0.0 mm (0.00 in)
1999	0.0 mm (0.00 in)
2000	14.5 mm (0.6 in)
2001	74.9 mm (2.9 in)
2002	104.9 mm (4.1 in)
2003	115.8 mm (4.6 in)
2004	38.9 mm (1.5 in)
2005	99.8 mm (3.9 in)
2006	37.8 mm (1.5 in)
2007	111.8 mm (4.4 in)
2008	45.0 mm (1.8 in)
2009	99.8 mm (3.9 in)

Wettest five days (Rx5day)

The wettest five days of the year at La Reforma, 1980 to 2009. The record is 188.4 mm (7.4 in) in 2005, marked on the chart; the median year is 102.8 mm (4.0 in).

Wettest five days (Rx5day) at La Reforma by year
Year	Wettest five days (Rx5day)
1980	51.0 mm (2.0 in)
1981	135.2 mm (5.3 in)
1982	172.3 mm (6.8 in)
1983	156.4 mm (6.2 in)
1984	103.0 mm (4.1 in)
1985	82.4 mm (3.2 in)
1986	77.7 mm (3.1 in)
1987	82.6 mm (3.3 in)
1988	116.3 mm (4.6 in)
1989	71.6 mm (2.8 in)
1990	173.6 mm (6.8 in)
1991	135.4 mm (5.3 in)
1992	63.0 mm (2.5 in)
1993	76.5 mm (3.0 in)
1994	42.2 mm (1.7 in)
1995	112.0 mm (4.4 in)
1996	182.1 mm (7.2 in)
1997	57.5 mm (2.3 in)
1998	0.0 mm (0.00 in)
1999	0.0 mm (0.00 in)
2000	28.2 mm (1.1 in)
2001	183.1 mm (7.2 in)
2002	185.2 mm (7.3 in)
2003	149.2 mm (5.9 in)
2004	89.9 mm (3.5 in)
2005	188.4 mm (7.4 in)
2006	62.4 mm (2.5 in)
2007	135.9 mm (5.4 in)
2008	107.4 mm (4.2 in)
2009	102.6 mm (4.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at La Reforma, 1980 to 2009. The record is 365 days in 1998, marked on the chart; the median year is 71 days.

Longest dry spell (CDD) at La Reforma by year
Year	Longest dry spell (CDD)
1980	52 days
1981	48 days
1982	88 days
1983	85 days
1984	84 days
1985	80 days
1986	60 days
1987	100 days
1988	73 days
1989	69 days
1990	102 days
1991	84 days
1992	64 days
1993	99 days
1994	51 days
1995	46 days
1996	84 days
1997	170 days
1998	365 days
1999	365 days
2000	121 days
2001	65 days
2002	51 days
2003	60 days
2004	49 days
2005	37 days
2006	52 days
2007	46 days
2008	65 days
2009	92 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 La Reforma standing records by year: CSV or JSON. Field meanings are on the data page.
Data for La Reforma 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 2026-10-16 (16 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).