Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at San Juan de Aragon. 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 San Juan de Aragon, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.0 C (86.0 F)
-8.9 C (16.0 F)
n/a
n/a
Feb
32.2 C (90.0 F)
-6.7 C (19.9 F)
n/a
n/a
Mar
38.3 C (100.9 F)
-2.8 C (27.0 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-2.2 C (28.0 F)
n/a
n/a
May
35.6 C (96.1 F)
2.2 C (36.0 F)
n/a
n/a
Jun
35.6 C (96.1 F)
5.0 C (41.0 F)
n/a
n/a
Jul
30.0 C (86.0 F)
5.0 C (41.0 F)
n/a
n/a
Aug
30.0 C (86.0 F)
3.9 C (39.0 F)
n/a
n/a
Sep
31.1 C (88.0 F)
2.2 C (36.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-0.6 C (30.9 F)
n/a
n/a
Nov
30.6 C (87.1 F)
-5.6 C (21.9 F)
n/a
n/a
Dec
29.4 C (84.9 F)
-5.6 C (21.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at San Juan de Aragon still stand. 1987 holds the most, with 74.
Standing records at San Juan de Aragon by the year they were set
Year set
Standing records
1953
32
1954
29
1955
52
1956
57
1957
36
1958
24
1959
22
1960
36
1961
29
1962
28
1963
21
1964
16
1965
24
1966
38
1967
22
1968
21
1969
13
1970
16
1971
13
1972
16
1973
16
1974
16
1975
18
1976
21
1977
36
1978
30
1979
34
1980
27
1981
30
1982
32
1983
42
1984
19
1985
17
1986
21
1987
74
1988
24
1991
38
1992
11
1993
17
1994
14
1995
30
1996
15
1997
25
1998
57
1999
21
2000
12
2001
22
2002
24
2003
22
2004
15
2005
41
2006
21
2007
18
2008
22
2011
16
2012
21
All-Time Record Progression
5 new records
5 all-time records were set at San Juan de Aragon between 18 May 1983 and 19 September 2002. Each dot is a new record.
When San Juan de Aragon set new all-time records
Date
Kind
Detail
1983-05-18
Record high minimum temperature
Record high minimum temperature 15.6 C (60.1 F)
1983-06-05
Record high minimum temperature
Record high minimum temperature 16.7 C (62.1 F)
1984-09-04
Record daily precipitation
Record daily precipitation 62.2 mm (2.4 in)
1986-03-17
Record high maximum temperature
Record high maximum temperature 38.3 C (100.9 F)
2002-09-19
Record daily precipitation
Record daily precipitation 71.9 mm (2.8 in)
Wettest Day of Each Month
Sep: 71.9 mm (2.8 in)
The wettest day on record for each calendar month at San Juan de Aragon. The most was 71.9 mm (2.8 in) on 19 September 2002.
Record daily precipitation for each month at San Juan de Aragon
Month
Record daily precipitation (mm)
Date
Jan
41.4 mm (1.6 in)
10 January 1967
Feb
24.4 mm (1.0 in)
26 February 1991
Mar
33.8 mm (1.3 in)
4 March 1988
Apr
38.4 mm (1.5 in)
13 April 1962
May
46.0 mm (1.8 in)
25 May 1995
Jun
59.9 mm (2.4 in)
30 June 2011
Jul
63.0 mm (2.5 in)
31 July 2007
Aug
59.9 mm (2.4 in)
14 August 1980
Sep
71.9 mm (2.8 in)
19 September 2002
Oct
65.3 mm (2.6 in)
11 October 2002
Nov
25.9 mm (1.0 in)
10 November 1958
Dec
27.2 mm (1.1 in)
30 December 1995
Period of Record Coverage
1953 to 2012
Complete yearUnder 90 percent of days
57 years of record at San Juan de Aragon, 1953 to 2012. 4 years have data for under 90 percent of days and are left out of rankings: 1953, 1991, 1992, 2010.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at San Juan de Aragon, 1954 to 2012. Blue stripes are years cooler than the station's own mean of 16.4 C (61.6 F); red stripes are warmer. The coolest year was 1956, at 14.9 C (58.8 F), and the warmest was 2005, at 17.6 C (63.7 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at San Juan de Aragon as warming stripes, 1954 to 2012
Year
Annual mean temperature
Difference from the station mean
1954
15.2 C
-1.23 C
1955
15.1 C
-1.28 C
1956
14.9 C
-1.54 C
1957
15.7 C
-0.72 C
1959
15.4 C
-1.05 C
1960
15.3 C
-1.16 C
1961
15.1 C
-1.30 C
1962
15.3 C
-1.17 C
1963
15.3 C
-1.10 C
1964
16.0 C
-0.45 C
1965
15.6 C
-0.83 C
1966
15.5 C
-0.94 C
1967
15.4 C
-0.99 C
1968
15.4 C
-0.98 C
1970
15.8 C
-0.66 C
1971
15.8 C
-0.67 C
1972
16.1 C
-0.32 C
1973
16.2 C
-0.22 C
1974
15.5 C
-0.90 C
1976
15.9 C
-0.51 C
1977
16.8 C
+0.40 C
1978
17.2 C
+0.80 C
1979
17.1 C
+0.69 C
1980
17.3 C
+0.87 C
1981
17.1 C
+0.68 C
1982
17.5 C
+1.04 C
1983
17.1 C
+0.72 C
1984
16.9 C
+0.52 C
1985
17.0 C
+0.59 C
1986
17.1 C
+0.69 C
1987
17.4 C
+1.00 C
1988
17.2 C
+0.74 C
1996
17.1 C
+0.65 C
1997
17.0 C
+0.60 C
1999
16.6 C
+0.18 C
2001
16.8 C
+0.41 C
2002
17.3 C
+0.86 C
2003
17.5 C
+1.11 C
2004
17.1 C
+0.70 C
2005
17.6 C
+1.20 C
2006
17.1 C
+0.72 C
2007
17.3 C
+0.88 C
2008
17.4 C
+1.00 C
2012
17.4 C
+1.02 C
The annual mean temperature here has risen by 0.4 C (0.4 to 0.5) per decade over 1954 to 2012. In Fahrenheit: 0.8 F (0.7 to 0.9) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at San Juan de Aragon
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.4 to 0.5) per decade
0.8 F (0.7 to 0.9) per decade
1954 to 2012
44
Rise
Mean daily maximum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.8) per decade
1954 to 2012
44
Rise
Mean daily minimum
0.6 C (0.5 to 0.7) per decade
1.1 F (0.9 to 1.2) per decade
1954 to 2012
44
Rise
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
1953 to 2012
Yearly extremes at San Juan de Aragon: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1986
32.8 C (91.0 F)
57
Coldest night (TNn)
-8.9 C (16.0 F)
1956
-2.8 C (27.0 F)
57
Wettest day (Rx1day)
71.9 mm (2.8 in)
2002
38.9 mm (1.5 in)
57
Wettest five days (Rx5day)
161.6 mm (6.4 in)
2002
68.9 mm (2.7 in)
57
Longest dry spell (CDD)
113 days
1986
56 days
57
Hottest day (TXx)
The hottest day of the year at San Juan de Aragon, 1953 to 2012. The record is 38.3 C (100.9 F) in 1986, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at San Juan de Aragon by year
Year
Hottest day (TXx)
1953
27.8 C (82.0 F)
1954
31.7 C (89.1 F)
1955
31.7 C (89.1 F)
1956
32.2 C (90.0 F)
1957
32.8 C (91.0 F)
1958
31.7 C (89.1 F)
1959
28.9 C (84.0 F)
1960
33.3 C (91.9 F)
1961
30.6 C (87.1 F)
1962
30.6 C (87.1 F)
1963
30.0 C (86.0 F)
1964
31.1 C (88.0 F)
1965
30.0 C (86.0 F)
1966
31.1 C (88.0 F)
1967
31.7 C (89.1 F)
1968
30.0 C (86.0 F)
1969
31.7 C (89.1 F)
1970
32.8 C (91.0 F)
1971
32.2 C (90.0 F)
1972
31.1 C (88.0 F)
1973
32.8 C (91.0 F)
1974
31.7 C (89.1 F)
1975
30.6 C (87.1 F)
1976
30.6 C (87.1 F)
1977
33.9 C (93.0 F)
1978
33.9 C (93.0 F)
1979
32.2 C (90.0 F)
1980
33.3 C (91.9 F)
1981
35.6 C (96.1 F)
1982
33.9 C (93.0 F)
1983
35.6 C (96.1 F)
1984
33.9 C (93.0 F)
1985
33.3 C (91.9 F)
1986
38.3 C (100.9 F)
1987
33.9 C (93.0 F)
1988
33.3 C (91.9 F)
1991
34.4 C (93.9 F)
1992
31.7 C (89.1 F)
1993
34.4 C (93.9 F)
1994
33.3 C (91.9 F)
1995
33.9 C (93.0 F)
1996
32.2 C (90.0 F)
1997
32.8 C (91.0 F)
1998
35.6 C (96.1 F)
1999
35.0 C (95.0 F)
2000
35.0 C (95.0 F)
2001
34.4 C (93.9 F)
2002
33.9 C (93.0 F)
2003
33.9 C (93.0 F)
2004
31.7 C (89.1 F)
2005
33.3 C (91.9 F)
2006
32.8 C (91.0 F)
2007
32.2 C (90.0 F)
2008
33.3 C (91.9 F)
2010
26.7 C (80.1 F)
2011
32.8 C (91.0 F)
2012
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at San Juan de Aragon, 1953 to 2012. The record is -8.9 C (16.0 F) in 1956, marked on the chart; the median year is -2.8 C (27.0 F).
Coldest night (TNn) at San Juan de Aragon by year
Year
Coldest night (TNn)
1953
-5.0 C (23.0 F)
1954
-5.6 C (21.9 F)
1955
-5.0 C (23.0 F)
1956
-8.9 C (16.0 F)
1957
-5.0 C (23.0 F)
1958
-3.3 C (26.1 F)
1959
-4.4 C (24.1 F)
1960
-6.7 C (19.9 F)
1961
-6.1 C (21.0 F)
1962
-4.4 C (24.1 F)
1963
-5.6 C (21.9 F)
1964
-4.4 C (24.1 F)
1965
-5.0 C (23.0 F)
1966
-4.4 C (24.1 F)
1967
-4.4 C (24.1 F)
1968
-2.8 C (27.0 F)
1969
-2.8 C (27.0 F)
1970
-3.3 C (26.1 F)
1971
-1.7 C (28.9 F)
1972
-3.9 C (25.0 F)
1973
-5.0 C (23.0 F)
1974
-5.0 C (23.0 F)
1975
-4.4 C (24.1 F)
1976
-5.6 C (21.9 F)
1977
-1.7 C (28.9 F)
1978
0.0 C (32.0 F)
1979
0.0 C (32.0 F)
1980
-2.8 C (27.0 F)
1981
-2.2 C (28.0 F)
1982
-1.7 C (28.9 F)
1983
-1.1 C (30.0 F)
1984
-0.6 C (30.9 F)
1985
-1.1 C (30.0 F)
1986
-5.0 C (23.0 F)
1987
-2.8 C (27.0 F)
1988
-2.8 C (27.0 F)
1991
1.7 C (35.1 F)
1992
0.0 C (32.0 F)
1993
0.6 C (33.1 F)
1994
3.9 C (39.0 F)
1995
0.0 C (32.0 F)
1996
-2.2 C (28.0 F)
1997
-2.2 C (28.0 F)
1998
-1.7 C (28.9 F)
1999
-2.8 C (27.0 F)
2000
0.6 C (33.1 F)
2001
1.1 C (34.0 F)
2002
-5.0 C (23.0 F)
2003
-1.1 C (30.0 F)
2004
-1.1 C (30.0 F)
2005
0.0 C (32.0 F)
2006
-5.0 C (23.0 F)
2007
0.0 C (32.0 F)
2008
-1.1 C (30.0 F)
2010
-1.1 C (30.0 F)
2011
-0.6 C (30.9 F)
2012
2.8 C (37.0 F)
Wettest day (Rx1day)
The wettest day of the year at San Juan de Aragon, 1953 to 2012. The record is 71.9 mm (2.8 in) in 2002, marked on the chart; the median year is 38.9 mm (1.5 in).
Wettest day (Rx1day) at San Juan de Aragon by year
Year
Wettest day (Rx1day)
1953
40.1 mm (1.6 in)
1954
37.3 mm (1.5 in)
1955
38.9 mm (1.5 in)
1956
45.0 mm (1.8 in)
1957
22.9 mm (0.9 in)
1958
30.5 mm (1.2 in)
1959
53.8 mm (2.1 in)
1960
40.9 mm (1.6 in)
1961
34.8 mm (1.4 in)
1962
38.4 mm (1.5 in)
1963
58.4 mm (2.3 in)
1964
39.4 mm (1.6 in)
1965
53.1 mm (2.1 in)
1966
21.3 mm (0.8 in)
1967
41.4 mm (1.6 in)
1968
44.5 mm (1.8 in)
1969
55.9 mm (2.2 in)
1970
39.9 mm (1.6 in)
1971
39.9 mm (1.6 in)
1972
30.0 mm (1.2 in)
1973
36.8 mm (1.4 in)
1974
30.5 mm (1.2 in)
1975
26.9 mm (1.1 in)
1976
36.8 mm (1.4 in)
1977
27.4 mm (1.1 in)
1978
34.3 mm (1.4 in)
1979
31.5 mm (1.2 in)
1980
59.9 mm (2.4 in)
1981
27.2 mm (1.1 in)
1982
58.9 mm (2.3 in)
1983
33.3 mm (1.3 in)
1984
62.2 mm (2.4 in)
1985
49.3 mm (1.9 in)
1986
40.4 mm (1.6 in)
1987
47.0 mm (1.9 in)
1988
35.8 mm (1.4 in)
1991
45.0 mm (1.8 in)
1992
10.2 mm (0.4 in)
1993
38.4 mm (1.5 in)
1994
37.8 mm (1.5 in)
1995
47.8 mm (1.9 in)
1996
33.0 mm (1.3 in)
1997
33.5 mm (1.3 in)
1998
23.9 mm (0.9 in)
1999
37.8 mm (1.5 in)
2000
48.8 mm (1.9 in)
2001
31.8 mm (1.3 in)
2002
71.9 mm (2.8 in)
2003
39.6 mm (1.6 in)
2004
32.5 mm (1.3 in)
2005
45.0 mm (1.8 in)
2006
35.3 mm (1.4 in)
2007
63.0 mm (2.5 in)
2008
48.0 mm (1.9 in)
2010
0.0 mm (0.00 in)
2011
59.9 mm (2.4 in)
2012
40.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at San Juan de Aragon, 1953 to 2012. The record is 161.6 mm (6.4 in) in 2002, marked on the chart; the median year is 68.9 mm (2.7 in).
Wettest five days (Rx5day) at San Juan de Aragon by year
Year
Wettest five days (Rx5day)
1953
58.9 mm (2.3 in)
1954
68.9 mm (2.7 in)
1955
67.1 mm (2.6 in)
1956
58.5 mm (2.3 in)
1957
41.4 mm (1.6 in)
1958
67.0 mm (2.6 in)
1959
58.7 mm (2.3 in)
1960
81.0 mm (3.2 in)
1961
69.2 mm (2.7 in)
1962
63.6 mm (2.5 in)
1963
65.9 mm (2.6 in)
1964
58.2 mm (2.3 in)
1965
78.6 mm (3.1 in)
1966
42.2 mm (1.7 in)
1967
75.5 mm (3.0 in)
1968
99.8 mm (3.9 in)
1969
112.7 mm (4.4 in)
1970
61.1 mm (2.4 in)
1971
82.6 mm (3.3 in)
1972
55.7 mm (2.2 in)
1973
85.1 mm (3.4 in)
1974
90.4 mm (3.6 in)
1975
60.9 mm (2.4 in)
1976
73.2 mm (2.9 in)
1977
59.2 mm (2.3 in)
1978
59.7 mm (2.4 in)
1979
70.9 mm (2.8 in)
1980
68.4 mm (2.7 in)
1981
67.4 mm (2.7 in)
1982
59.9 mm (2.4 in)
1983
72.4 mm (2.9 in)
1984
126.8 mm (5.0 in)
1985
60.2 mm (2.4 in)
1986
89.1 mm (3.5 in)
1987
88.9 mm (3.5 in)
1988
64.5 mm (2.5 in)
1991
74.5 mm (2.9 in)
1992
28.0 mm (1.1 in)
1993
104.6 mm (4.1 in)
1994
76.9 mm (3.0 in)
1995
79.1 mm (3.1 in)
1996
53.4 mm (2.1 in)
1997
58.2 mm (2.3 in)
1998
58.7 mm (2.3 in)
1999
116.9 mm (4.6 in)
2000
119.7 mm (4.7 in)
2001
60.8 mm (2.4 in)
2002
161.6 mm (6.4 in)
2003
61.4 mm (2.4 in)
2004
69.4 mm (2.7 in)
2005
61.0 mm (2.4 in)
2006
80.8 mm (3.2 in)
2007
105.9 mm (4.2 in)
2008
136.5 mm (5.4 in)
2010
0.0 mm (0.00 in)
2011
127.5 mm (5.0 in)
2012
94.6 mm (3.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at San Juan de Aragon, 1953 to 2012. The record is 113 days in 1986, marked on the chart; the median year is 56 days.
Longest dry spell (CDD) at San Juan de Aragon by year
Year
Longest dry spell (CDD)
1953
38 days
1954
46 days
1955
99 days
1956
110 days
1957
52 days
1958
52 days
1959
96 days
1960
65 days
1961
94 days
1962
46 days
1963
79 days
1964
64 days
1965
30 days
1966
58 days
1967
67 days
1968
52 days
1969
62 days
1970
80 days
1971
76 days
1972
86 days
1973
57 days
1974
64 days
1975
65 days
1976
55 days
1977
63 days
1978
43 days
1979
42 days
1980
34 days
1981
58 days
1982
55 days
1983
56 days
1984
83 days
1985
73 days
1986
113 days
1987
63 days
1988
43 days
1991
61 days
1992
36 days
1993
43 days
1994
49 days
1995
31 days
1996
54 days
1997
69 days
1998
71 days
1999
60 days
2000
59 days
2001
46 days
2002
45 days
2003
50 days
2004
43 days
2005
42 days
2006
82 days
2007
31 days
2008
41 days
2010
31 days
2011
38 days
2012
56 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
26 years with a frost
Across 26 years with a frost, the median last spring frost at San Juan de Aragon falls on 23 February and the median first autumn frost on 27 November, which leaves a median of 271 days between them.
Fitted over all years, the growing season changes by +19.8 days per decade at this station.
Frost dates and growing season at San Juan de Aragon
Measure
Median, all years
Earliest period
Recent period (1954 to 2006)
Recent against earliest
Fitted trend
Last spring frost
23 February
n/a
23 February
n/a
-13.7 days per decade
First autumn frost
27 November
n/a
27 November
n/a
+6.1 days per decade
Growing days
271 days
n/a
271 days
n/a
+19.8 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
54 years, 1954 to 2012
A day with at least 39.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 75.4 mm (3.0 in) of rain is expected about once in 100 years.
Rainfall return levels at San Juan de Aragon: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.4 mm (1.6 in)
5 years
49.7 mm (2.0 in)
10 years
56.3 mm (2.2 in)
25 years
64.2 mm (2.5 in)
50 years
69.9 mm (2.8 in)
100 years
75.4 mm (3.0 in)
Longer than the 54 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, 54 years of values from 1954 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: 71.9 mm (2.8 in) in 2002; 63.0 mm (2.5 in) in 2007; 62.2 mm (2.4 in) in 1984.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of San Juan de Aragon, at 1996. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1996 ran 0.5 C (1.0 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at San Juan de Aragon, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1996
-0.5
-1.0
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.
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Data for San Juan de Aragon standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Juan de Aragon 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.