Rio Frio Weather Records (MXN00028080)

Record envelope, standing records and threshold days for Rio Frio (MXN00028080), Mexico, with 47 years of record.

Key Facts for Rio Frio

Rio Frio (MXN00028080) is a weather station in Mexico at 22.82 latitude and -99.02 longitude, 60 m (196 ft) above sea level.
The station reports from 1966 to 2012, 47 years of record.
1,464 records set at Rio Frio still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Rio Frio tied a daily record high maximum temperature of 31.7 C (89.1 F) on 8 December 2012.

About the Station

Location: Mexico, 22.82 latitude, -99.02 longitude.
Elevation: 60 m (196 ft).
Period of record: 1966 to 2012, 47 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 Rio Frio. 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 Rio Frio, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	38.9 C (102.0 F)	-0.6 C (30.9 F)	n/a	n/a
Feb	41.7 C (107.1 F)	-1.1 C (30.0 F)	n/a	n/a
Mar	46.7 C (116.1 F)	0.6 C (33.1 F)	n/a	n/a
Apr	47.8 C (118.0 F)	6.7 C (44.1 F)	n/a	n/a
May	48.9 C (120.0 F)	13.9 C (57.0 F)	n/a	n/a
Jun	45.0 C (113.0 F)	18.9 C (66.0 F)	n/a	n/a
Jul	41.1 C (106.0 F)	18.9 C (66.0 F)	n/a	n/a
Aug	40.6 C (105.1 F)	18.9 C (66.0 F)	n/a	n/a
Sep	40.0 C (104.0 F)	13.9 C (57.0 F)	n/a	n/a
Oct	40.0 C (104.0 F)	8.9 C (48.0 F)	n/a	n/a
Nov	37.2 C (99.0 F)	3.9 C (39.0 F)	n/a	n/a
Dec	36.7 C (98.1 F)	-2.2 C (28.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rio Frio still stand. 1973 holds the most, with 58.

Standing records at Rio Frio by the year they were set
Year set	Standing records
1967	25
1968	33
1969	55
1970	56
1971	47
1972	49
1973	58
1974	51
1975	46
1976	39
1977	27
1978	25
1979	32
1980	38
1981	36
1982	37
1983	28
1984	38
1985	32
1986	20
1987	34
1988	26
1989	53
1990	28
1991	29
1992	24
1993	23
1994	20
1995	33
1996	40
1997	42
1998	40
1999	23
2000	19
2001	17
2002	13
2003	24
2004	24
2005	15
2006	37
2007	5
2008	45
2009	23
2010	23
2011	25
2012	7

All-Time Record Progression

5 new records

5 all-time records were set at Rio Frio between 22 June 1997 and 4 February 2011. Each dot is a new record.

When Rio Frio set new all-time records
Date	Kind	Detail
1997-06-22	Record daily precipitation	Record daily precipitation 231.9 mm (9.1 in)
1998-04-16	Record high maximum temperature	Record high maximum temperature 47.8 C (118.0 F)
1999-05-04	Record high maximum temperature	Record high maximum temperature 48.9 C (120.0 F)
1999-09-06	Record daily precipitation	Record daily precipitation 298.5 mm (11.8 in)
2011-02-04	Record low maximum temperature	Record low maximum temperature 7.8 C (46.0 F)

Wettest Day of Each Month

Sep: 298.5 mm (11.8 in)

The wettest day on record for each calendar month at Rio Frio. The most was 298.5 mm (11.8 in) on 6 September 1999.

Record daily precipitation for each month at Rio Frio
Month	Record daily precipitation (mm)	Date
Jan	50.8 mm (2.0 in)	22 January 1994
Feb	69.3 mm (2.7 in)	25 February 1982
Mar	70.9 mm (2.8 in)	25 March 1999
Apr	91.2 mm (3.6 in)	17 April 1974
May	137.4 mm (5.4 in)	4 May 1980
Jun	231.9 mm (9.1 in)	22 June 1997
Jul	227.8 mm (9.0 in)	21 July 2005
Aug	174.0 mm (6.9 in)	31 August 1994
Sep	298.5 mm (11.8 in)	6 September 1999
Oct	201.9 mm (7.9 in)	5 October 2000
Nov	78.0 mm (3.1 in)	19 November 2001
Dec	102.9 mm (4.1 in)	3 December 1979

Period of Record Coverage

1967 to 2012

46 years of record at Rio Frio, 1967 to 2012. 3 years have data for under 90 percent of days and are left out of rankings: 1967, 2005, 2007.

Days with data per year at Rio Frio
Year	Days with data	Share of year	Complete
1967	150	41%	No
1968	361	99%	Yes
1969	356	98%	Yes
1970	362	99%	Yes
1971	363	99%	Yes
1972	363	99%	Yes
1973	363	99%	Yes
1974	363	99%	Yes
1975	360	99%	Yes
1976	353	96%	Yes
1977	361	99%	Yes
1978	358	98%	Yes
1979	358	98%	Yes
1980	358	98%	Yes
1981	361	99%	Yes
1982	361	99%	Yes
1983	361	99%	Yes
1984	365	100%	Yes
1985	364	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	365	100%	Yes
1992	351	96%	Yes
1993	343	94%	Yes
1994	364	100%	Yes
1995	365	100%	Yes
1996	364	99%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	363	99%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	364	100%	Yes
2004	366	100%	Yes
2005	273	75%	No
2006	337	92%	Yes
2007	243	67%	No
2008	363	99%	Yes
2009	364	100%	Yes
2010	364	100%	Yes
2011	360	99%	Yes
2012	366	100%	Yes

Latest Records

Latest records at Rio Frio
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 December 2012	Rio Frio, MX	daily high max (Tie)	31.7 C (89.1 F)	tie	18 years	2 of 100 (Routine)
1 December 2012	Rio Frio, MX	daily high max (Tie)	31.7 C (89.1 F)	tie	45 years	4 of 100 (Routine)
23 November 2012	Rio Frio, MX	daily rain	27.7 mm (1.1 in)	23.6 mm (0.9 in)	18 years	28 of 100 (Routine)
11 November 2012	Rio Frio, MX	daily high max (Tie)	33.9 C (93.0 F)	tie	27 years	3 of 100 (Routine)
27 October 2012	Rio Frio, MX	daily low max (Tie)	23.9 C (75.0 F)	tie	34 years	3 of 100 (Routine)
25 October 2012	Rio Frio, MX	daily high min (Tie)	23.9 C (75.0 F)	tie	42 years	4 of 100 (Routine)
25 October 2012	Rio Frio, MX	daily high max (Tie)	35.0 C (95.0 F)	tie	25 years	2 of 100 (Routine)
30 September 2012	Rio Frio, MX	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	32 years	16 of 100 (Routine)
13 September 2012	Rio Frio, MX	daily low max (Tie)	28.9 C (84.0 F)	tie	37 years	3 of 100 (Routine)
9 September 2012	Rio Frio, MX	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	35 years	17 of 100 (Routine)
8 September 2012	Rio Frio, MX	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	11 years	10 of 100 (Routine)
20 August 2012	Rio Frio, MX	daily high min (Tie)	25.0 C (77.0 F)	tie	45 years	4 of 100 (Routine)
13 August 2012	Rio Frio, MX	daily rain	35.6 mm (1.4 in)	7.2 mm (0.28 in)	29 years	15 of 100 (Routine)
5 August 2012	Rio Frio, MX	daily high min (Tie)	25.0 C (77.0 F)	tie	32 years	3 of 100 (Routine)
4 August 2012	Rio Frio, MX	daily high min (Tie)	25.0 C (77.0 F)	tie	32 years	3 of 100 (Routine)
1 August 2012	Rio Frio, MX	daily high min (Tie)	25.0 C (77.0 F)	tie	35 years	3 of 100 (Routine)
21 July 2012	Rio Frio, MX	daily low min (Tie)	21.7 C (71.1 F)	tie	38 years	3 of 100 (Routine)
2 July 2012	Rio Frio, MX	daily low min (Tie)	20.6 C (69.1 F)	tie	41 years	4 of 100 (Routine)
1 July 2012	Rio Frio, MX	daily low min (Tie)	20.0 C (68.0 F)	tie	27 years	3 of 100 (Routine)
3 June 2012	Rio Frio, MX	daily low min (Tie)	20.0 C (68.0 F)	tie	40 years	4 of 100 (Routine)

Climate Trend

39 complete years, 1968 to 2012

One stripe for each of 39 complete years at Rio Frio, 1968 to 2012. Blue stripes are years cooler than the station's own mean of 25.5 C (77.8 F); red stripes are warmer. The coolest year was 1976, at 24.2 C (75.5 F), and the warmest was 1998, at 26.6 C (79.9 F). The strongest colour marks a difference of 1.3 C (2.3 F).

Annual mean temperature at Rio Frio as warming stripes, 1968 to 2012
Year	Annual mean temperature	Difference from the station mean
1968	24.8 C	-0.65 C
1969	25.8 C	+0.30 C
1970	24.8 C	-0.68 C
1971	25.9 C	+0.43 C
1972	25.8 C	+0.36 C
1973	25.2 C	-0.28 C
1974	25.6 C	+0.11 C
1975	25.6 C	+0.15 C
1976	24.2 C	-1.28 C
1977	25.3 C	-0.20 C
1978	25.2 C	-0.26 C
1979	25.0 C	-0.48 C
1980	25.7 C	+0.18 C
1981	25.4 C	-0.04 C
1982	25.8 C	+0.29 C
1983	25.4 C	-0.12 C
1984	25.0 C	-0.51 C
1985	25.2 C	-0.29 C
1986	25.3 C	-0.16 C
1987	24.6 C	-0.83 C
1988	25.1 C	-0.40 C
1989	25.1 C	-0.34 C
1990	25.7 C	+0.18 C
1991	25.6 C	+0.09 C
1994	25.8 C	+0.28 C
1995	26.3 C	+0.81 C
1996	25.7 C	+0.26 C
1997	25.3 C	-0.20 C
1998	26.6 C	+1.16 C
1999	25.8 C	+0.29 C
2000	25.8 C	+0.28 C
2001	25.2 C	-0.23 C
2002	25.2 C	-0.31 C
2003	25.6 C	+0.08 C
2004	25.5 C	+0.02 C
2008	25.9 C	+0.45 C
2009	26.1 C	+0.58 C
2011	26.1 C	+0.64 C
2012	25.6 C	+0.16 C

The annual mean temperature here has risen by 0.15 C (0.04 to 0.26) per decade over 1968 to 2012. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rio Frio
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.15 C (0.04 to 0.26) per decade	0.3 F (0.1 to 0.5) per decade	1968 to 2012	39	Rise
Mean daily maximum	0.3 C (0.1 to 0.4) per decade	0.5 F (0.2 to 0.8) per decade	1968 to 2012	39	Rise
Mean daily minimum	0.03 C (-0.08 to 0.14) per decade	0.1 F (-0.1 to 0.3) per decade	1968 to 2012	39	Not clearly different from zero

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

1966 to 2012

Yearly extremes at Rio Frio: 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)	1999	41.7 C (107.1 F)	46
Coldest night (TNn)	-2.2 C (28.0 F)	1989	3.9 C (39.0 F)	46
Wettest day (Rx1day)	298.5 mm (11.8 in)	1999	121.2 mm (4.8 in)	47
Wettest five days (Rx5day)	479.7 mm (18.9 in)	1999	193.1 mm (7.6 in)	47
Longest dry spell (CDD)	121 days	2011	48 days	47

Hottest day (TXx)

The hottest day of the year at Rio Frio, 1966 to 2012. The record is 48.9 C (120.0 F) in 1999, marked on the chart; the median year is 41.7 C (107.1 F).

Hottest day (TXx) at Rio Frio by year
Year	Hottest day (TXx)
1966	n/a
1967	40.6 C (105.1 F)
1968	40.0 C (104.0 F)
1969	42.2 C (108.0 F)
1970	40.0 C (104.0 F)
1971	45.0 C (113.0 F)
1972	45.0 C (113.0 F)
1973	46.7 C (116.1 F)
1974	44.4 C (111.9 F)
1975	46.7 C (116.1 F)
1976	41.7 C (107.1 F)
1977	42.8 C (109.0 F)
1978	46.1 C (115.0 F)
1979	45.0 C (113.0 F)
1980	42.2 C (108.0 F)
1981	40.0 C (104.0 F)
1982	40.6 C (105.1 F)
1983	43.9 C (111.0 F)
1984	45.6 C (114.1 F)
1985	40.0 C (104.0 F)
1986	40.0 C (104.0 F)
1987	40.0 C (104.0 F)
1988	40.6 C (105.1 F)
1989	42.2 C (108.0 F)
1990	40.6 C (105.1 F)
1991	43.3 C (109.9 F)
1992	38.9 C (102.0 F)
1993	38.9 C (102.0 F)
1994	40.0 C (104.0 F)
1995	46.1 C (115.0 F)
1996	41.7 C (107.1 F)
1997	40.6 C (105.1 F)
1998	47.8 C (118.0 F)
1999	48.9 C (120.0 F)
2000	42.2 C (108.0 F)
2001	41.1 C (106.0 F)
2002	40.6 C (105.1 F)
2003	42.8 C (109.0 F)
2004	40.6 C (105.1 F)
2005	40.0 C (104.0 F)
2006	42.8 C (109.0 F)
2007	40.0 C (104.0 F)
2008	41.7 C (107.1 F)
2009	40.6 C (105.1 F)
2010	43.9 C (111.0 F)
2011	43.9 C (111.0 F)
2012	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Rio Frio, 1966 to 2012. The record is -2.2 C (28.0 F) in 1989, marked on the chart; the median year is 3.9 C (39.0 F).

Coldest night (TNn) at Rio Frio by year
Year	Coldest night (TNn)
1966	n/a
1967	3.3 C (37.9 F)
1968	3.9 C (39.0 F)
1969	5.0 C (41.0 F)
1970	5.0 C (41.0 F)
1971	3.9 C (39.0 F)
1972	6.7 C (44.1 F)
1973	1.1 C (34.0 F)
1974	3.9 C (39.0 F)
1975	-0.6 C (30.9 F)
1976	2.8 C (37.0 F)
1977	2.8 C (37.0 F)
1978	7.2 C (45.0 F)
1979	3.9 C (39.0 F)
1980	6.7 C (44.1 F)
1981	6.7 C (44.1 F)
1982	2.8 C (37.0 F)
1983	-1.1 C (30.0 F)
1984	5.6 C (42.1 F)
1985	0.6 C (33.1 F)
1986	5.0 C (41.0 F)
1987	3.9 C (39.0 F)
1988	3.9 C (39.0 F)
1989	-2.2 C (28.0 F)
1990	5.0 C (41.0 F)
1991	7.8 C (46.0 F)
1992	5.0 C (41.0 F)
1993	5.6 C (42.1 F)
1994	6.1 C (43.0 F)
1995	6.7 C (44.1 F)
1996	3.3 C (37.9 F)
1997	0.6 C (33.1 F)
1998	6.7 C (44.1 F)
1999	3.9 C (39.0 F)
2000	5.0 C (41.0 F)
2001	3.9 C (39.0 F)
2002	5.6 C (42.1 F)
2003	2.8 C (37.0 F)
2004	0.6 C (33.1 F)
2005	6.7 C (44.1 F)
2006	4.4 C (39.9 F)
2007	0.6 C (33.1 F)
2008	3.9 C (39.0 F)
2009	5.0 C (41.0 F)
2010	1.7 C (35.1 F)
2011	-1.1 C (30.0 F)
2012	5.6 C (42.1 F)

Wettest day (Rx1day)

The wettest day of the year at Rio Frio, 1966 to 2012. The record is 298.5 mm (11.8 in) in 1999, marked on the chart; the median year is 121.2 mm (4.8 in).

Wettest day (Rx1day) at Rio Frio by year
Year	Wettest day (Rx1day)
1966	102.9 mm (4.1 in)
1967	112.8 mm (4.4 in)
1968	142.0 mm (5.6 in)
1969	91.9 mm (3.6 in)
1970	189.5 mm (7.5 in)
1971	122.2 mm (4.8 in)
1972	145.8 mm (5.7 in)
1973	152.9 mm (6.0 in)
1974	171.2 mm (6.7 in)
1975	181.6 mm (7.1 in)
1976	100.1 mm (3.9 in)
1977	146.1 mm (5.8 in)
1978	113.8 mm (4.5 in)
1979	127.8 mm (5.0 in)
1980	137.4 mm (5.4 in)
1981	86.4 mm (3.4 in)
1982	104.4 mm (4.1 in)
1983	58.4 mm (2.3 in)
1984	65.3 mm (2.6 in)
1985	105.9 mm (4.2 in)
1986	169.9 mm (6.7 in)
1987	165.6 mm (6.5 in)
1988	65.8 mm (2.6 in)
1989	121.4 mm (4.8 in)
1990	73.9 mm (2.9 in)
1991	167.1 mm (6.6 in)
1992	115.3 mm (4.5 in)
1993	156.5 mm (6.2 in)
1994	174.0 mm (6.9 in)
1995	65.3 mm (2.6 in)
1996	81.5 mm (3.2 in)
1997	231.9 mm (9.1 in)
1998	52.8 mm (2.1 in)
1999	298.5 mm (11.8 in)
2000	201.9 mm (7.9 in)
2001	80.0 mm (3.1 in)
2002	81.3 mm (3.2 in)
2003	150.9 mm (5.9 in)
2004	121.2 mm (4.8 in)
2005	227.8 mm (9.0 in)
2006	42.7 mm (1.7 in)
2007	68.8 mm (2.7 in)
2008	159.8 mm (6.3 in)
2009	110.0 mm (4.3 in)
2010	70.9 mm (2.8 in)
2011	122.2 mm (4.8 in)
2012	71.9 mm (2.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rio Frio, 1966 to 2012. The record is 479.7 mm (18.9 in) in 1999, marked on the chart; the median year is 193.1 mm (7.6 in).

Wettest five days (Rx5day) at Rio Frio by year
Year	Wettest five days (Rx5day)
1966	167.6 mm (6.6 in)
1967	179.4 mm (7.1 in)
1968	163.7 mm (6.4 in)
1969	159.3 mm (6.3 in)
1970	318.0 mm (12.5 in)
1971	279.7 mm (11.0 in)
1972	171.7 mm (6.8 in)
1973	284.1 mm (11.2 in)
1974	229.6 mm (9.0 in)
1975	224.6 mm (8.8 in)
1976	335.3 mm (13.2 in)
1977	330.0 mm (13.0 in)
1978	291.1 mm (11.5 in)
1979	187.3 mm (7.4 in)
1980	158.6 mm (6.2 in)
1981	238.3 mm (9.4 in)
1982	164.9 mm (6.5 in)
1983	147.6 mm (5.8 in)
1984	104.2 mm (4.1 in)
1985	254.5 mm (10.0 in)
1986	213.4 mm (8.4 in)
1987	217.7 mm (8.6 in)
1988	175.7 mm (6.9 in)
1989	128.6 mm (5.1 in)
1990	176.3 mm (6.9 in)
1991	284.7 mm (11.2 in)
1992	221.4 mm (8.7 in)
1993	269.8 mm (10.6 in)
1994	253.0 mm (10.0 in)
1995	148.1 mm (5.8 in)
1996	181.8 mm (7.2 in)
1997	283.3 mm (11.2 in)
1998	133.6 mm (5.3 in)
1999	479.7 mm (18.9 in)
2000	354.3 mm (13.9 in)
2001	138.6 mm (5.5 in)
2002	146.7 mm (5.8 in)
2003	193.1 mm (7.6 in)
2004	195.4 mm (7.7 in)
2005	460.5 mm (18.1 in)
2006	63.0 mm (2.5 in)
2007	158.8 mm (6.3 in)
2008	369.6 mm (14.6 in)
2009	159.8 mm (6.3 in)
2010	103.1 mm (4.1 in)
2011	299.1 mm (11.8 in)
2012	149.9 mm (5.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rio Frio, 1966 to 2012. The record is 121 days in 2011, marked on the chart; the median year is 48 days.

Longest dry spell (CDD) at Rio Frio by year
Year	Longest dry spell (CDD)
1966	47 days
1967	59 days
1968	29 days
1969	36 days
1970	87 days
1971	102 days
1972	58 days
1973	37 days
1974	37 days
1975	44 days
1976	42 days
1977	101 days
1978	48 days
1979	74 days
1980	85 days
1981	51 days
1982	45 days
1983	73 days
1984	84 days
1985	36 days
1986	64 days
1987	23 days
1988	81 days
1989	55 days
1990	70 days
1991	42 days
1992	31 days
1993	28 days
1994	48 days
1995	37 days
1996	84 days
1997	31 days
1998	60 days
1999	83 days
2000	42 days
2001	67 days
2002	38 days
2003	69 days
2004	48 days
2005	45 days
2006	31 days
2007	30 days
2008	32 days
2009	31 days
2010	77 days
2011	121 days
2012	38 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

43 years, 1968 to 2012

A day with at least 119.0 mm (4.7 in) of rain is expected about once in 2 years. A day with at least 276.4 mm (10.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Rio Frio: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	119.0 mm (4.7 in)
5 years	166.5 mm (6.6 in)
10 years	195.6 mm (7.7 in)
25 years	230.0 mm (9.1 in)
50 years	253.9 mm (10.0 in)	Longer than the 43 years of record
100 years	276.4 mm (10.9 in)	Longer than the 43 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, 43 years of values from 1968 to 2012.

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: 298.5 mm (11.8 in) in 1999; 231.9 mm (9.1 in) in 1997; 201.9 mm (7.9 in) in 2000.

Download the Data

Data for Rio Frio standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rio Frio 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 2026-10-14 (14 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).