Record highRecord low2026 daily maximum2026 daily minimum
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
Year with most
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
Complete yearUnder 90 percent of days
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.
Cooler than the station meanWarmer than the station mean
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.