Rosario Weather Records (MXN00010061)

Record envelope, standing records and threshold days for Rosario (MXN00010061), Mexico, with 46 years of record.

Key Facts for Rosario

Rosario (MXN00010061) is a weather station in Mexico at 26.50 latitude and -105.63 longitude, 1,800 m (5,905 ft) above sea level.
The station reports from 1963 to 2008, 46 years of record.
1,464 records set at Rosario still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Rosario tied a daily record high minimum temperature of 5.0 C (41.0 F) on 16 February 2008.

About the Station

Location: Mexico, 26.50 latitude, -105.63 longitude.
Elevation: 1,800 m (5,905 ft).
Period of record: 1963 to 2008, 46 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 Rosario. 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 Rosario, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	28.9 C (84.0 F)	-13.3 C (8.1 F)	n/a	n/a
Feb	30.0 C (86.0 F)	-12.2 C (10.0 F)	n/a	n/a
Mar	32.8 C (91.0 F)	-11.1 C (12.0 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-6.1 C (21.0 F)	n/a	n/a
May	37.8 C (100.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	38.9 C (102.0 F)	3.9 C (39.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	3.3 C (37.9 F)	n/a	n/a
Aug	36.7 C (98.1 F)	0.6 C (33.1 F)	n/a	n/a
Sep	35.6 C (96.1 F)	-2.2 C (28.0 F)	n/a	n/a
Oct	33.9 C (93.0 F)	-5.0 C (23.0 F)	n/a	n/a
Nov	32.8 C (91.0 F)	-10.0 C (14.0 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-17.8 C (0.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rosario still stand. 1980 holds the most, with 75.

Standing records at Rosario by the year they were set
Year set	Standing records
1964	28
1965	58
1966	22
1967	49
1968	24
1969	42
1970	45
1971	47
1972	54
1973	54
1974	20
1975	23
1976	21
1977	37
1978	35
1979	26
1980	75
1981	64
1982	52
1983	51
1984	30
1985	43
1986	20
1987	32
1988	6
1989	33
1990	60
1991	13
1992	40
1993	21
1994	66
1995	27
1996	24
1997	37
1998	17
1999	10
2000	14
2001	10
2002	17
2003	12
2004	14
2005	36
2006	30
2007	19
2008	6

All-Time Record Progression

1 new records

1 all-time records were set at Rosario between 13 December 1997 and 13 December 1997. Each dot is a new record.

Wettest Day of Each Month

Aug: 99.8 mm (3.9 in)

The wettest day on record for each calendar month at Rosario. The most was 99.8 mm (3.9 in) on 10 August 1970.

Record daily precipitation for each month at Rosario
Month	Record daily precipitation (mm)	Date
Jan	22.4 mm (0.9 in)	3 January 1966
Feb	20.1 mm (0.8 in)	21 February 1970
Mar	39.9 mm (1.6 in)	29 March 2004
Apr	39.9 mm (1.6 in)	11 April 1978
May	36.3 mm (1.4 in)	28 May 2003
Jun	70.9 mm (2.8 in)	9 June 1979
Jul	68.1 mm (2.7 in)	9 July 1968
Aug	99.8 mm (3.9 in)	10 August 1970
Sep	80.3 mm (3.2 in)	23 September 1971
Oct	41.9 mm (1.6 in)	7 October 2000
Nov	37.8 mm (1.5 in)	15 November 2004
Dec	30.5 mm (1.2 in)	11 December 1997

Period of Record Coverage

1964 to 2008

45 years of record at Rosario, 1964 to 2008. 6 years have data for under 90 percent of days and are left out of rankings: 1964, 1973, 1988, 1989, 1999, 2008.

Days with data per year at Rosario
Year	Days with data	Share of year	Complete
1964	230	63%	No
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	363	99%	Yes
1970	365	100%	Yes
1971	364	100%	Yes
1972	366	100%	Yes
1973	304	83%	No
1974	335	92%	Yes
1975	364	100%	Yes
1976	366	100%	Yes
1977	360	99%	Yes
1978	349	96%	Yes
1979	333	91%	Yes
1980	366	100%	Yes
1981	364	100%	Yes
1982	363	99%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	364	100%	Yes
1987	364	100%	Yes
1988	59	16%	No
1989	182	50%	No
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	365	100%	Yes
1994	352	96%	Yes
1995	363	99%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	333	91%	Yes
1999	304	83%	No
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	365	100%	Yes
2005	363	99%	Yes
2006	364	100%	Yes
2007	365	100%	Yes
2008	60	16%	No

Latest Records

Latest records at Rosario
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
16 February 2008	Rosario, MX	daily high min (Tie)	5.0 C (41.0 F)	tie	8 years	1 of 100 (Routine)
15 February 2008	Rosario, MX	daily high min	5.6 C (42.1 F)	1.7 C (3.1 F)	1 year	8 of 100 (Routine)
14 February 2008	Rosario, MX	daily high min (Tie)	3.9 C (39.0 F)	tie	16 years	2 of 100 (Routine)
5 February 2008	Rosario, MX	daily high min	5.6 C (42.1 F)	0.6 C (1.1 F)	38 years	16 of 100 (Routine)
29 January 2008	Rosario, MX	daily high min (Tie)	5.0 C (41.0 F)	tie	29 years	3 of 100 (Routine)
28 January 2008	Rosario, MX	daily high min	5.0 C (41.0 F)	1.1 C (2.0 F)	38 years	18 of 100 (Routine)
25 January 2008	Rosario, MX	daily high min (Tie)	5.0 C (41.0 F)	tie	32 years	3 of 100 (Routine)
23 January 2008	Rosario, MX	daily high min	5.6 C (42.1 F)	0.6 C (1.1 F)	2 years	5 of 100 (Routine)
16 January 2008	Rosario, MX	daily low min	-11.1 C (12.0 F)	1.1 C (2.0 F)	10 years	10 of 100 (Routine)
11 January 2008	Rosario, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	2 years	1 of 100 (Routine)
10 January 2008	Rosario, MX	daily high max	25.6 C (78.1 F)	0.6 C (1.1 F)	2 years	5 of 100 (Routine)
27 December 2007	Rosario, MX	daily high min (Tie)	5.6 C (42.1 F)	tie	32 years	3 of 100 (Routine)
7 December 2007	Rosario, MX	daily high max (Tie)	25.6 C (78.1 F)	tie	40 years	4 of 100 (Routine)
30 October 2007	Rosario, MX	daily low min	-4.4 C (24.1 F)	1.1 C (2.0 F)	36 years	17 of 100 (Routine)
26 October 2007	Rosario, MX	daily low min (Tie)	-1.7 C (28.9 F)	tie	40 years	4 of 100 (Routine)
25 October 2007	Rosario, MX	daily low min	-2.2 C (28.0 F)	2.2 C (4.0 F)	41 years	21 of 100 (Routine)
23 October 2007	Rosario, MX	daily low min	-2.8 C (27.0 F)	0.6 C (1.1 F)	41 years	17 of 100 (Routine)
16 October 2007	Rosario, MX	daily high max (Tie)	30.6 C (87.1 F)	tie	34 years	3 of 100 (Routine)
13 October 2007	Rosario, MX	daily high max (Tie)	30.6 C (87.1 F)	tie	34 years	3 of 100 (Routine)
12 October 2007	Rosario, MX	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	28 years	15 of 100 (Routine)

Climate Trend

35 complete years, 1965 to 2007

One stripe for each of 35 complete years at Rosario, 1965 to 2007. Blue stripes are years cooler than the station's own mean of 15.0 C (59.0 F); red stripes are warmer. The coolest year was 1982, at 13.0 C (55.3 F), and the warmest was 1994, at 16.9 C (62.5 F). The strongest colour marks a difference of 2.1 C (3.8 F).

Annual mean temperature at Rosario as warming stripes, 1965 to 2007
Year	Annual mean temperature	Difference from the station mean
1965	16.0 C	+1.01 C
1966	15.5 C	+0.46 C
1967	15.8 C	+0.84 C
1968	15.0 C	+0.03 C
1969	16.0 C	+1.02 C
1970	15.7 C	+0.65 C
1971	15.6 C	+0.64 C
1972	16.3 C	+1.26 C
1975	15.1 C	+0.12 C
1976	14.7 C	-0.33 C
1977	15.6 C	+0.63 C
1980	13.8 C	-1.24 C
1981	13.9 C	-1.06 C
1982	13.0 C	-2.03 C
1983	13.0 C	-2.00 C
1984	14.1 C	-0.94 C
1985	14.5 C	-0.52 C
1986	14.9 C	-0.12 C
1987	14.0 C	-0.97 C
1990	14.1 C	-0.87 C
1991	14.9 C	-0.12 C
1992	14.3 C	-0.66 C
1993	14.9 C	-0.06 C
1994	16.9 C	+1.92 C
1995	15.2 C	+0.20 C
1996	15.4 C	+0.42 C
1997	14.7 C	-0.30 C
2000	14.4 C	-0.61 C
2001	13.3 C	-1.69 C
2002	13.6 C	-1.45 C
2003	15.3 C	+0.28 C
2004	15.8 C	+0.83 C
2005	16.5 C	+1.54 C
2006	16.7 C	+1.72 C
2007	16.3 C	+1.25 C

The fitted trend in annual mean temperature here over 1965 to 2007 is -0.03 C (-0.31 to 0.26) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.05 F (-0.55 to 0.46) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rosario
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.03 C (-0.31 to 0.26) per decade	-0.05 F (-0.55 to 0.46) per decade	1965 to 2007	35	Not clearly different from zero
Mean daily maximum	-0.1 C (-0.6 to 0.4) per decade	-0.2 F (-1.2 to 0.8) per decade	1965 to 2007	35	Not clearly different from zero
Mean daily minimum	0.1 C (-0.2 to 0.3) per decade	0.1 F (-0.3 to 0.5) per decade	1965 to 2007	35	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

1963 to 2008

Yearly extremes at Rosario: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1969	35.6 C (96.1 F)	45
Coldest night (TNn)	-17.8 C (0.0 F)	1997	-10.0 C (14.0 F)	45
Wettest day (Rx1day)	99.8 mm (3.9 in)	1970	39.9 mm (1.6 in)	46
Wettest five days (Rx5day)	140.0 mm (5.5 in)	1967	72.8 mm (2.9 in)	46
Longest dry spell (CDD)	194 days	1980	94 days	46

Hottest day (TXx)

The hottest day of the year at Rosario, 1963 to 2008. The record is 38.9 C (102.0 F) in 1969, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Rosario by year
Year	Hottest day (TXx)
1963	n/a
1964	36.7 C (98.1 F)
1965	35.6 C (96.1 F)
1966	35.6 C (96.1 F)
1967	36.7 C (98.1 F)
1968	35.6 C (96.1 F)
1969	38.9 C (102.0 F)
1970	36.7 C (98.1 F)
1971	35.6 C (96.1 F)
1972	35.6 C (96.1 F)
1973	35.0 C (95.0 F)
1974	35.0 C (95.0 F)
1975	35.0 C (95.0 F)
1976	35.0 C (95.0 F)
1977	35.6 C (96.1 F)
1978	35.6 C (96.1 F)
1979	36.7 C (98.1 F)
1980	36.1 C (97.0 F)
1981	38.3 C (100.9 F)
1982	27.8 C (82.0 F)
1983	27.8 C (82.0 F)
1984	31.7 C (89.1 F)
1985	35.0 C (95.0 F)
1986	32.8 C (91.0 F)
1987	37.2 C (99.0 F)
1988	26.7 C (80.1 F)
1989	35.6 C (96.1 F)
1990	36.7 C (98.1 F)
1991	35.6 C (96.1 F)
1992	37.8 C (100.0 F)
1993	35.0 C (95.0 F)
1994	36.7 C (98.1 F)
1995	35.6 C (96.1 F)
1996	36.1 C (97.0 F)
1997	37.8 C (100.0 F)
1998	36.7 C (98.1 F)
1999	30.6 C (87.1 F)
2000	35.0 C (95.0 F)
2001	33.3 C (91.9 F)
2002	35.6 C (96.1 F)
2003	36.1 C (97.0 F)
2004	35.0 C (95.0 F)
2005	37.8 C (100.0 F)
2006	37.8 C (100.0 F)
2007	36.7 C (98.1 F)
2008	26.7 C (80.1 F)

Coldest night (TNn)

The coldest night of the year at Rosario, 1963 to 2008. The record is -17.8 C (0.0 F) in 1997, marked on the chart; the median year is -10.0 C (14.0 F).

Coldest night (TNn) at Rosario by year
Year	Coldest night (TNn)
1963	n/a
1964	-8.3 C (17.1 F)
1965	-13.3 C (8.1 F)
1966	-10.0 C (14.0 F)
1967	-10.0 C (14.0 F)
1968	-8.3 C (17.1 F)
1969	-9.4 C (15.1 F)
1970	-9.4 C (15.1 F)
1971	-11.1 C (12.0 F)
1972	-9.4 C (15.1 F)
1973	-12.2 C (10.0 F)
1974	-11.1 C (12.0 F)
1975	-12.2 C (10.0 F)
1976	-12.2 C (10.0 F)
1977	-10.0 C (14.0 F)
1978	-10.0 C (14.0 F)
1979	-6.1 C (21.0 F)
1980	-6.1 C (21.0 F)
1981	-6.1 C (21.0 F)
1982	-6.1 C (21.0 F)
1983	-10.0 C (14.0 F)
1984	-7.8 C (18.0 F)
1985	-10.0 C (14.0 F)
1986	-7.8 C (18.0 F)
1987	-10.0 C (14.0 F)
1988	-11.1 C (12.0 F)
1989	-10.0 C (14.0 F)
1990	-10.0 C (14.0 F)
1991	-6.7 C (19.9 F)
1992	-10.0 C (14.0 F)
1993	-8.9 C (16.0 F)
1994	-8.3 C (17.1 F)
1995	-8.3 C (17.1 F)
1996	-10.0 C (14.0 F)
1997	-17.8 C (0.0 F)
1998	-10.0 C (14.0 F)
1999	-7.8 C (18.0 F)
2000	-8.3 C (17.1 F)
2001	-12.2 C (10.0 F)
2002	-7.2 C (19.0 F)
2003	-10.0 C (14.0 F)
2004	-11.7 C (10.9 F)
2005	-5.6 C (21.9 F)
2006	-10.0 C (14.0 F)
2007	-8.3 C (17.1 F)
2008	-11.1 C (12.0 F)

Wettest day (Rx1day)

The wettest day of the year at Rosario, 1963 to 2008. The record is 99.8 mm (3.9 in) in 1970, marked on the chart; the median year is 39.9 mm (1.6 in).

Wettest day (Rx1day) at Rosario by year
Year	Wettest day (Rx1day)
1963	45.7 mm (1.8 in)
1964	62.5 mm (2.5 in)
1965	33.5 mm (1.3 in)
1966	37.8 mm (1.5 in)
1967	65.8 mm (2.6 in)
1968	79.0 mm (3.1 in)
1969	31.0 mm (1.2 in)
1970	99.8 mm (3.9 in)
1971	80.3 mm (3.2 in)
1972	65.3 mm (2.6 in)
1973	63.8 mm (2.5 in)
1974	32.3 mm (1.3 in)
1975	43.7 mm (1.7 in)
1976	50.5 mm (2.0 in)
1977	29.0 mm (1.1 in)
1978	42.9 mm (1.7 in)
1979	70.9 mm (2.8 in)
1980	30.0 mm (1.2 in)
1981	43.9 mm (1.7 in)
1982	19.8 mm (0.8 in)
1983	22.4 mm (0.9 in)
1984	21.8 mm (0.9 in)
1985	39.9 mm (1.6 in)
1986	30.0 mm (1.2 in)
1987	31.8 mm (1.3 in)
1988	0.0 mm (0.00 in)
1989	39.9 mm (1.6 in)
1990	24.9 mm (1.0 in)
1991	51.8 mm (2.0 in)
1992	24.4 mm (1.0 in)
1993	24.4 mm (1.0 in)
1994	24.9 mm (1.0 in)
1995	80.3 mm (3.2 in)
1996	30.0 mm (1.2 in)
1997	40.4 mm (1.6 in)
1998	39.9 mm (1.6 in)
1999	39.9 mm (1.6 in)
2000	51.3 mm (2.0 in)
2001	20.3 mm (0.8 in)
2002	45.5 mm (1.8 in)
2003	36.3 mm (1.4 in)
2004	39.9 mm (1.6 in)
2005	41.9 mm (1.6 in)
2006	40.6 mm (1.6 in)
2007	36.8 mm (1.4 in)
2008	0.0 mm (0.00 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rosario, 1963 to 2008. The record is 140.0 mm (5.5 in) in 1967, marked on the chart; the median year is 72.8 mm (2.9 in).

Wettest five days (Rx5day) at Rosario by year
Year	Wettest five days (Rx5day)
1963	48.2 mm (1.9 in)
1964	76.7 mm (3.0 in)
1965	78.2 mm (3.1 in)
1966	75.7 mm (3.0 in)
1967	140.0 mm (5.5 in)
1968	127.5 mm (5.0 in)
1969	56.4 mm (2.2 in)
1970	111.0 mm (4.4 in)
1971	93.5 mm (3.7 in)
1972	122.2 mm (4.8 in)
1973	111.0 mm (4.4 in)
1974	71.5 mm (2.8 in)
1975	79.1 mm (3.1 in)
1976	90.0 mm (3.5 in)
1977	61.5 mm (2.4 in)
1978	87.4 mm (3.4 in)
1979	79.5 mm (3.1 in)
1980	62.0 mm (2.4 in)
1981	68.3 mm (2.7 in)
1982	46.5 mm (1.8 in)
1983	35.5 mm (1.4 in)
1984	44.2 mm (1.7 in)
1985	70.4 mm (2.8 in)
1986	57.6 mm (2.3 in)
1987	91.2 mm (3.6 in)
1988	0.0 mm (0.00 in)
1989	71.4 mm (2.8 in)
1990	71.8 mm (2.8 in)
1991	105.2 mm (4.1 in)
1992	57.9 mm (2.3 in)
1993	43.7 mm (1.7 in)
1994	38.1 mm (1.5 in)
1995	100.1 mm (3.9 in)
1996	57.2 mm (2.3 in)
1997	81.0 mm (3.2 in)
1998	75.2 mm (3.0 in)
1999	73.7 mm (2.9 in)
2000	76.4 mm (3.0 in)
2001	59.9 mm (2.4 in)
2002	103.4 mm (4.1 in)
2003	44.9 mm (1.8 in)
2004	65.8 mm (2.6 in)
2005	75.1 mm (3.0 in)
2006	108.7 mm (4.3 in)
2007	55.3 mm (2.2 in)
2008	0.0 mm (0.00 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rosario, 1963 to 2008. The record is 194 days in 1980, marked on the chart; the median year is 94 days.

Longest dry spell (CDD) at Rosario by year
Year	Longest dry spell (CDD)
1963	41 days
1964	55 days
1965	84 days
1966	55 days
1967	88 days
1968	35 days
1969	121 days
1970	88 days
1971	131 days
1972	77 days
1973	80 days
1974	148 days
1975	126 days
1976	65 days
1977	91 days
1978	99 days
1979	60 days
1980	194 days
1981	52 days
1982	101 days
1983	94 days
1984	99 days
1985	72 days
1986	82 days
1987	109 days
1988	59 days
1989	30 days
1990	151 days
1991	119 days
1992	93 days
1993	131 days
1994	131 days
1995	119 days
1996	152 days
1997	99 days
1998	156 days
1999	68 days
2000	142 days
2001	94 days
2002	89 days
2003	92 days
2004	46 days
2005	122 days
2006	130 days
2007	116 days
2008	60 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

35 years with a frost

Across 35 years with a frost, the median last spring frost at Rosario falls on 3 April and the median first autumn frost on 31 October, which leaves a median of 214 days between them.

Fitted over all years, the growing season changes by +3.6 days per decade at this station.

Frost dates and growing season at Rosario
Measure	Median, all years	Earliest period	Recent period (1970 to 2007)	Recent against earliest	Fitted trend
Last spring frost	3 April	n/a	3 April	n/a	-3.4 days per decade
First autumn frost	31 October	n/a	1 November	n/a	+0.1 days per decade
Growing days	214 days	n/a	216 days	n/a	+3.6 days per decade

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.

Rainfall Return Levels

40 years, 1964 to 2007

A day with at least 38.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 117.0 mm (4.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Rosario: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	38.3 mm (1.5 in)
5 years	54.9 mm (2.2 in)
10 years	67.5 mm (2.7 in)
25 years	85.5 mm (3.4 in)
50 years	100.5 mm (4.0 in)	Longer than the 40 years of record
100 years	117.0 mm (4.6 in)	Longer than the 40 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, 40 years of values from 1964 to 2007.

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: 99.8 mm (3.9 in) in 1970; 80.3 mm (3.2 in) in 1971; 80.3 mm (3.2 in) in 1995.

Download the Data

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