Rancho Viejo Weather Records (MXN00001021)

Record envelope, standing records and threshold days for Rancho Viejo (MXN00001021), Mexico, with 55 years of record.

Key Facts for Rancho Viejo

Rancho Viejo (MXN00001021) is a weather station in Mexico at 22.12 latitude and -102.50 longitude, 2,127 m (6,977 ft) above sea level.
The station reports from 1959 to 2013, 55 years of record.
1,464 records set at Rancho Viejo still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Rancho Viejo set a daily record precipitation of 59.9 mm (2.4 in) on 15 July 2013.

About the Station

Location: Mexico, 22.12 latitude, -102.50 longitude.
Elevation: 2,127 m (6,977 ft).
Period of record: 1959 to 2013, 55 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 Rancho Viejo. 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 Rancho Viejo, 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)	-6.1 C (21.0 F)	n/a	n/a
Feb	31.7 C (89.1 F)	-5.0 C (23.0 F)	n/a	n/a
Mar	32.8 C (91.0 F)	-4.4 C (24.1 F)	n/a	n/a
Apr	36.7 C (98.1 F)	0.0 C (32.0 F)	n/a	n/a
May	37.8 C (100.0 F)	1.7 C (35.1 F)	n/a	n/a
Jun	38.9 C (102.0 F)	5.0 C (41.0 F)	n/a	n/a
Jul	35.0 C (95.0 F)	6.7 C (44.1 F)	n/a	n/a
Aug	32.8 C (91.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	31.7 C (89.1 F)	2.8 C (37.0 F)	n/a	n/a
Oct	31.7 C (89.1 F)	-1.1 C (30.0 F)	n/a	n/a
Nov	30.0 C (86.0 F)	-6.1 C (21.0 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-10.0 C (14.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Rancho Viejo still stand. 1994 holds the most, with 61.

Standing records at Rancho Viejo by the year they were set
Year set	Standing records
1962	10
1963	35
1964	36
1965	34
1966	46
1967	39
1968	23
1969	35
1970	30
1971	16
1972	54
1973	28
1974	19
1975	29
1976	32
1977	33
1978	22
1979	30
1980	41
1981	45
1982	31
1983	34
1984	44
1985	22
1986	27
1987	35
1988	22
1989	17
1990	30
1991	1
1992	18
1993	21
1994	61
1995	20
1996	11
1997	34
1998	43
1999	16
2000	21
2001	19
2002	31
2003	52
2004	16
2005	25
2006	33
2007	19
2008	25
2009	21
2010	24
2011	39
2012	8
2013	7

All-Time Record Progression

6 new records

6 all-time records were set at Rancho Viejo between 20 May 1995 and 4 June 1998. Each dot is a new record.

When Rancho Viejo set new all-time records
Date	Kind	Detail
1995-05-20	Record high maximum temperature	Record high maximum temperature 35.6 C (96.1 F)
1996-05-22	Record high maximum temperature	Record high maximum temperature 36.7 C (98.1 F)
1997-12-13	Record low maximum temperature	Record low maximum temperature 5.6 C (42.1 F)
1997-12-14	Record low minimum temperature	Record low minimum temperature -10.0 C (14.0 F)
1998-05-25	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
1998-06-04	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)

Wettest Day of Each Month

Jun: 119.9 mm (4.7 in)

The wettest day on record for each calendar month at Rancho Viejo. The most was 119.9 mm (4.7 in) on 26 June 2007.

Record daily precipitation for each month at Rancho Viejo
Month	Record daily precipitation (mm)	Date
Jan	40.9 mm (1.6 in)	9 January 1992
Feb	45.0 mm (1.8 in)	2 February 2010
Mar	57.9 mm (2.3 in)	4 March 1968
Apr	20.6 mm (0.8 in)	14 April 1962
May	51.8 mm (2.0 in)	25 May 1971
Jun	119.9 mm (4.7 in)	26 June 2007
Jul	79.8 mm (3.1 in)	13 July 2002
Aug	119.9 mm (4.7 in)	27 August 1966
Sep	74.9 mm (2.9 in)	12 September 2005
Oct	58.9 mm (2.3 in)	9 October 1992
Nov	41.1 mm (1.6 in)	28 November 1976
Dec	30.0 mm (1.2 in)	27 December 1974

Period of Record Coverage

1962 to 2013

52 years of record at Rancho Viejo, 1962 to 2013. 4 years have data for under 90 percent of days and are left out of rankings: 1962, 1991, 1992, 2013.

Days with data per year at Rancho Viejo
Year	Days with data	Share of year	Complete
1962	129	35%	No
1963	365	100%	Yes
1964	365	100%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	364	100%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	364	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	364	99%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	364	100%	Yes
1990	365	100%	Yes
1991	54	15%	No
1992	177	48%	No
1993	365	100%	Yes
1994	334	92%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	365	100%	Yes
1999	365	100%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	365	100%	Yes
2004	353	96%	Yes
2005	365	100%	Yes
2006	364	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	335	92%	Yes
2010	364	100%	Yes
2011	364	100%	Yes
2012	366	100%	Yes
2013	212	58%	No

Latest Records

Latest records at Rancho Viejo
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 July 2013	Rancho Viejo, MX	daily rain	59.9 mm (2.4 in)	15.4 mm (0.6 in)	38 years	28 of 100 (Routine)
7 July 2013	Rancho Viejo, MX	daily rain	42.9 mm (1.7 in)	11.9 mm (0.5 in)	22 years	20 of 100 (Routine)
4 July 2013	Rancho Viejo, MX	daily rain	69.9 mm (2.8 in)	22.9 mm (0.9 in)	36 years	34 of 100 (Routine)
29 June 2013	Rancho Viejo, MX	daily low min (Tie)	10.0 C (50.0 F)	tie	47 years	4 of 100 (Routine)
25 June 2013	Rancho Viejo, MX	daily rain	45.0 mm (1.8 in)	11.2 mm (0.4 in)	27 years	21 of 100 (Routine)
15 June 2013	Rancho Viejo, MX	daily rain	23.9 mm (0.9 in)	12.0 mm (0.5 in)	23 years	20 of 100 (Routine)
14 June 2013	Rancho Viejo, MX	daily rain	47.8 mm (1.9 in)	12.0 mm (0.5 in)	14 years	18 of 100 (Routine)
4 May 2013	Rancho Viejo, MX	daily low min (Tie)	5.6 C (42.1 F)	tie	35 years	3 of 100 (Routine)
3 May 2013	Rancho Viejo, MX	daily low min	6.1 C (43.0 F)	0.6 C (1.1 F)	36 years	18 of 100 (Routine)
1 May 2013	Rancho Viejo, MX	daily low min (Tie)	5.6 C (42.1 F)	tie	15 years	2 of 100 (Routine)
20 April 2013	Rancho Viejo, MX	daily low min (Tie)	5.0 C (41.0 F)	tie	42 years	4 of 100 (Routine)
19 April 2013	Rancho Viejo, MX	daily high max (Tie)	33.9 C (93.0 F)	tie	12 years	2 of 100 (Routine)
7 April 2013	Rancho Viejo, MX	daily high max (Tie)	32.8 C (91.0 F)	tie	40 years	4 of 100 (Routine)
2 April 2013	Rancho Viejo, MX	daily high max	32.8 C (91.0 F)	1.1 C (2.0 F)	31 years	17 of 100 (Routine)
1 April 2013	Rancho Viejo, MX	daily high max (Tie)	31.7 C (89.1 F)	tie	7 years	1 of 100 (Routine)
31 March 2013	Rancho Viejo, MX	monthly high max (Tie)	32.8 C (91.0 F)	tie	11 years	4 of 100 (Routine)
30 March 2013	Rancho Viejo, MX	daily high max	31.7 C (89.1 F)	1.1 C (2.0 F)	34 years	18 of 100 (Routine)
27 March 2013	Rancho Viejo, MX	daily low min (Tie)	2.8 C (37.0 F)	tie	30 years	3 of 100 (Routine)
21 March 2013	Rancho Viejo, MX	daily high max (Tie)	31.7 C (89.1 F)	tie	12 years	2 of 100 (Routine)
3 March 2013	Rancho Viejo, MX	monthly low min	-4.4 C (24.1 F)	1.1 C (2.0 F)	0 years	19 of 100 (Routine)

Climate Trend

46 complete years, 1963 to 2012

One stripe for each of 46 complete years at Rancho Viejo, 1963 to 2012. Blue stripes are years cooler than the station's own mean of 16.8 C (62.3 F); red stripes are warmer. The coolest year was 1966, at 15.1 C (59.2 F), and the warmest was 2011, at 18.1 C (64.5 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Rancho Viejo as warming stripes, 1963 to 2012
Year	Annual mean temperature	Difference from the station mean
1963	16.0 C	-0.80 C
1964	15.5 C	-1.29 C
1965	15.9 C	-0.98 C
1966	15.1 C	-1.74 C
1967	15.5 C	-1.32 C
1968	16.1 C	-0.70 C
1969	16.9 C	+0.07 C
1970	16.8 C	0.00 C
1971	16.9 C	+0.08 C
1972	17.4 C	+0.54 C
1973	16.4 C	-0.41 C
1974	16.4 C	-0.39 C
1975	16.8 C	-0.01 C
1976	16.1 C	-0.76 C
1977	16.5 C	-0.29 C
1978	16.7 C	-0.15 C
1979	17.0 C	+0.14 C
1980	17.0 C	+0.17 C
1981	17.0 C	+0.15 C
1982	17.6 C	+0.79 C
1983	16.5 C	-0.33 C
1984	16.6 C	-0.21 C
1985	16.6 C	-0.28 C
1986	16.7 C	-0.10 C
1987	16.5 C	-0.34 C
1988	17.0 C	+0.19 C
1989	17.0 C	+0.14 C
1990	17.0 C	+0.14 C
1993	17.6 C	+0.81 C
1995	17.5 C	+0.71 C
1996	17.4 C	+0.56 C
1997	17.1 C	+0.23 C
1998	17.7 C	+0.88 C
1999	17.1 C	+0.28 C
2000	17.5 C	+0.69 C
2001	17.2 C	+0.34 C
2002	17.4 C	+0.54 C
2003	17.6 C	+0.77 C
2004	16.6 C	-0.24 C
2005	17.0 C	+0.17 C
2006	17.0 C	+0.17 C
2007	17.3 C	+0.51 C
2008	16.9 C	+0.08 C
2010	16.4 C	-0.44 C
2011	18.1 C	+1.24 C
2012	17.4 C	+0.56 C

The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1963 to 2012. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 46 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Rancho Viejo
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.2 to 0.4) per decade	0.5 F (0.3 to 0.7) per decade	1963 to 2012	46	Rise
Mean daily maximum	0.6 C (0.4 to 0.8) per decade	1.1 F (0.8 to 1.4) per decade	1963 to 2012	46	Rise
Mean daily minimum	-0.04 C (-0.18 to 0.09) per decade	-0.1 F (-0.3 to 0.2) per decade	1963 to 2012	46	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

1959 to 2013

Yearly extremes at Rancho Viejo: 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)	1998	33.9 C (93.0 F)	52
Coldest night (TNn)	-10.0 C (14.0 F)	1997	-3.3 C (26.1 F)	52
Wettest day (Rx1day)	119.9 mm (4.7 in)	1966	47.8 mm (1.9 in)	55
Wettest five days (Rx5day)	168.4 mm (6.6 in)	1966	90.4 mm (3.6 in)	55
Longest dry spell (CDD)	172 days	2011	91 days	55

Hottest day (TXx)

The hottest day of the year at Rancho Viejo, 1959 to 2013. The record is 38.9 C (102.0 F) in 1998, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Rancho Viejo by year
Year	Hottest day (TXx)
1959	n/a
1960	n/a
1961	n/a
1962	26.7 C (80.1 F)
1963	31.7 C (89.1 F)
1964	31.7 C (89.1 F)
1965	32.8 C (91.0 F)
1966	31.7 C (89.1 F)
1967	33.9 C (93.0 F)
1968	32.8 C (91.0 F)
1969	35.0 C (95.0 F)
1970	32.8 C (91.0 F)
1971	35.0 C (95.0 F)
1972	35.0 C (95.0 F)
1973	33.9 C (93.0 F)
1974	32.8 C (91.0 F)
1975	32.8 C (91.0 F)
1976	32.8 C (91.0 F)
1977	31.7 C (89.1 F)
1978	32.8 C (91.0 F)
1979	32.8 C (91.0 F)
1980	32.8 C (91.0 F)
1981	32.8 C (91.0 F)
1982	35.0 C (95.0 F)
1983	35.0 C (95.0 F)
1984	31.7 C (89.1 F)
1985	32.8 C (91.0 F)
1986	33.9 C (93.0 F)
1987	31.7 C (89.1 F)
1988	33.9 C (93.0 F)
1989	35.0 C (95.0 F)
1990	35.0 C (95.0 F)
1991	26.7 C (80.1 F)
1992	30.0 C (86.0 F)
1993	35.0 C (95.0 F)
1994	33.9 C (93.0 F)
1995	35.6 C (96.1 F)
1996	36.7 C (98.1 F)
1997	32.8 C (91.0 F)
1998	38.9 C (102.0 F)
1999	35.0 C (95.0 F)
2000	35.0 C (95.0 F)
2001	35.0 C (95.0 F)
2002	37.8 C (100.0 F)
2003	36.7 C (98.1 F)
2004	33.9 C (93.0 F)
2005	37.8 C (100.0 F)
2006	35.6 C (96.1 F)
2007	35.0 C (95.0 F)
2008	37.8 C (100.0 F)
2009	36.7 C (98.1 F)
2010	36.7 C (98.1 F)
2011	36.7 C (98.1 F)
2012	35.6 C (96.1 F)
2013	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Rancho Viejo, 1959 to 2013. The record is -10.0 C (14.0 F) in 1997, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Rancho Viejo by year
Year	Coldest night (TNn)
1959	n/a
1960	n/a
1961	n/a
1962	-1.1 C (30.0 F)
1963	-7.2 C (19.0 F)
1964	-5.0 C (23.0 F)
1965	-2.2 C (28.0 F)
1966	-5.0 C (23.0 F)
1967	-4.4 C (24.1 F)
1968	0.0 C (32.0 F)
1969	-2.2 C (28.0 F)
1970	-5.0 C (23.0 F)
1971	-3.3 C (26.1 F)
1972	-3.3 C (26.1 F)
1973	-6.1 C (21.0 F)
1974	-4.4 C (24.1 F)
1975	-4.4 C (24.1 F)
1976	-5.0 C (23.0 F)
1977	-2.2 C (28.0 F)
1978	-2.2 C (28.0 F)
1979	-2.2 C (28.0 F)
1980	-1.1 C (30.0 F)
1981	-3.3 C (26.1 F)
1982	-1.1 C (30.0 F)
1983	0.0 C (32.0 F)
1984	-1.1 C (30.0 F)
1985	-1.1 C (30.0 F)
1986	-4.4 C (24.1 F)
1987	-2.2 C (28.0 F)
1988	-1.1 C (30.0 F)
1989	-1.1 C (30.0 F)
1990	-2.2 C (28.0 F)
1991	-1.1 C (30.0 F)
1992	0.0 C (32.0 F)
1993	0.6 C (33.1 F)
1994	0.0 C (32.0 F)
1995	0.0 C (32.0 F)
1996	0.0 C (32.0 F)
1997	-10.0 C (14.0 F)
1998	-5.0 C (23.0 F)
1999	-4.4 C (24.1 F)
2000	-3.3 C (26.1 F)
2001	-3.3 C (26.1 F)
2002	-4.4 C (24.1 F)
2003	-6.1 C (21.0 F)
2004	-4.4 C (24.1 F)
2005	0.0 C (32.0 F)
2006	-8.3 C (17.1 F)
2007	-4.4 C (24.1 F)
2008	-5.0 C (23.0 F)
2009	-1.1 C (30.0 F)
2010	-4.4 C (24.1 F)
2011	-6.1 C (21.0 F)
2012	-2.2 C (28.0 F)
2013	-4.4 C (24.1 F)

Wettest day (Rx1day)

The wettest day of the year at Rancho Viejo, 1959 to 2013. The record is 119.9 mm (4.7 in) in 1966, marked on the chart; the median year is 47.8 mm (1.9 in).

Wettest day (Rx1day) at Rancho Viejo by year
Year	Wettest day (Rx1day)
1959	42.4 mm (1.7 in)
1960	35.8 mm (1.4 in)
1961	46.0 mm (1.8 in)
1962	51.8 mm (2.0 in)
1963	32.8 mm (1.3 in)
1964	56.9 mm (2.2 in)
1965	58.9 mm (2.3 in)
1966	119.9 mm (4.7 in)
1967	54.9 mm (2.2 in)
1968	57.9 mm (2.3 in)
1969	20.8 mm (0.8 in)
1970	45.0 mm (1.8 in)
1971	51.8 mm (2.0 in)
1972	47.8 mm (1.9 in)
1973	79.8 mm (3.1 in)
1974	51.8 mm (2.0 in)
1975	81.0 mm (3.2 in)
1976	51.8 mm (2.0 in)
1977	53.8 mm (2.1 in)
1978	40.9 mm (1.6 in)
1979	30.0 mm (1.2 in)
1980	61.0 mm (2.4 in)
1981	30.0 mm (1.2 in)
1982	39.9 mm (1.6 in)
1983	38.9 mm (1.5 in)
1984	46.0 mm (1.8 in)
1985	41.9 mm (1.6 in)
1986	59.9 mm (2.4 in)
1987	75.9 mm (3.0 in)
1988	43.9 mm (1.7 in)
1989	51.8 mm (2.0 in)
1990	39.9 mm (1.6 in)
1991	59.9 mm (2.4 in)
1992	58.9 mm (2.3 in)
1993	41.9 mm (1.6 in)
1994	35.8 mm (1.4 in)
1995	52.3 mm (2.1 in)
1996	61.0 mm (2.4 in)
1997	52.8 mm (2.1 in)
1998	46.0 mm (1.8 in)
1999	47.8 mm (1.9 in)
2000	42.9 mm (1.7 in)
2001	37.8 mm (1.5 in)
2002	79.8 mm (3.1 in)
2003	63.0 mm (2.5 in)
2004	45.0 mm (1.8 in)
2005	74.9 mm (2.9 in)
2006	45.0 mm (1.8 in)
2007	119.9 mm (4.7 in)
2008	47.0 mm (1.9 in)
2009	42.9 mm (1.7 in)
2010	45.0 mm (1.8 in)
2011	30.0 mm (1.2 in)
2012	36.1 mm (1.4 in)
2013	69.9 mm (2.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rancho Viejo, 1959 to 2013. The record is 168.4 mm (6.6 in) in 1966, marked on the chart; the median year is 90.4 mm (3.6 in).

Wettest five days (Rx5day) at Rancho Viejo by year
Year	Wettest five days (Rx5day)
1959	86.6 mm (3.4 in)
1960	75.2 mm (3.0 in)
1961	79.2 mm (3.1 in)
1962	99.0 mm (3.9 in)
1963	76.7 mm (3.0 in)
1964	81.3 mm (3.2 in)
1965	110.4 mm (4.3 in)
1966	168.4 mm (6.6 in)
1967	150.3 mm (5.9 in)
1968	138.4 mm (5.4 in)
1969	60.2 mm (2.4 in)
1970	65.1 mm (2.6 in)
1971	89.1 mm (3.5 in)
1972	89.4 mm (3.5 in)
1973	145.7 mm (5.7 in)
1974	67.8 mm (2.7 in)
1975	105.4 mm (4.1 in)
1976	136.9 mm (5.4 in)
1977	122.5 mm (4.8 in)
1978	81.3 mm (3.2 in)
1979	87.3 mm (3.4 in)
1980	83.6 mm (3.3 in)
1981	52.6 mm (2.1 in)
1982	65.6 mm (2.6 in)
1983	92.4 mm (3.6 in)
1984	110.3 mm (4.3 in)
1985	79.5 mm (3.1 in)
1986	137.3 mm (5.4 in)
1987	140.5 mm (5.5 in)
1988	90.4 mm (3.6 in)
1989	94.5 mm (3.7 in)
1990	145.3 mm (5.7 in)
1991	150.6 mm (5.9 in)
1992	126.5 mm (5.0 in)
1993	76.1 mm (3.0 in)
1994	75.4 mm (3.0 in)
1995	115.4 mm (4.5 in)
1996	119.8 mm (4.7 in)
1997	63.5 mm (2.5 in)
1998	77.0 mm (3.0 in)
1999	68.3 mm (2.7 in)
2000	100.3 mm (3.9 in)
2001	84.3 mm (3.3 in)
2002	129.8 mm (5.1 in)
2003	124.5 mm (4.9 in)
2004	94.5 mm (3.7 in)
2005	99.8 mm (3.9 in)
2006	79.8 mm (3.1 in)
2007	164.3 mm (6.5 in)
2008	99.3 mm (3.9 in)
2009	77.5 mm (3.1 in)
2010	88.7 mm (3.5 in)
2011	43.4 mm (1.7 in)
2012	60.2 mm (2.4 in)
2013	157.8 mm (6.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rancho Viejo, 1959 to 2013. The record is 172 days in 2011, marked on the chart; the median year is 91 days.

Longest dry spell (CDD) at Rancho Viejo by year
Year	Longest dry spell (CDD)
1959	35 days
1960	95 days
1961	84 days
1962	101 days
1963	58 days
1964	104 days
1965	54 days
1966	50 days
1967	69 days
1968	46 days
1969	127 days
1970	97 days
1971	144 days
1972	49 days
1973	74 days
1974	107 days
1975	119 days
1976	91 days
1977	79 days
1978	154 days
1979	110 days
1980	54 days
1981	56 days
1982	110 days
1983	75 days
1984	95 days
1985	80 days
1986	104 days
1987	60 days
1988	66 days
1989	146 days
1990	69 days
1991	117 days
1992	29 days
1993	103 days
1994	87 days
1995	97 days
1996	84 days
1997	79 days
1998	114 days
1999	146 days
2000	126 days
2001	60 days
2002	54 days
2003	116 days
2004	46 days
2005	69 days
2006	111 days
2007	110 days
2008	80 days
2009	79 days
2010	97 days
2011	172 days
2012	121 days
2013	131 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

33 years with a frost

Across 33 years with a frost, the median last spring frost at Rancho Viejo falls on 19 February and the median first autumn frost on 27 November, which leaves a median of 276 days between them.

Fitted over all years, the growing season changes by -1.3 days per decade at this station.

Frost dates and growing season at Rancho Viejo
Measure	Median, all years	Earliest period	Recent period (1966 to 2012)	Recent against earliest	Fitted trend
Last spring frost	19 February	n/a	19 February	n/a	-0.6 days per decade
First autumn frost	27 November	n/a	26 November	n/a	-1.9 days per decade
Growing days	276 days	n/a	278 days	n/a	-1.3 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

53 years, 1960 to 2012

A day with at least 48.0 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 119.0 mm (4.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Rancho Viejo: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	48.0 mm (1.9 in)
5 years	63.2 mm (2.5 in)
10 years	74.7 mm (2.9 in)
25 years	90.9 mm (3.6 in)
50 years	104.3 mm (4.1 in)
100 years	119.0 mm (4.7 in)	Longer than the 53 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, 53 years of values from 1960 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: 119.9 mm (4.7 in) in 1966; 119.9 mm (4.7 in) in 2007; 81.0 mm (3.2 in) in 1975.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Rancho Viejo, at 1973. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1973 ran 0.4 C (0.7 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Rancho Viejo, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1973	-0.4	-0.7	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

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