Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Tlahualilo. 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 Tlahualilo, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
32.8 C (91.0 F)
-9.4 C (15.1 F)
n/a
n/a
Feb
35.6 C (96.1 F)
-7.2 C (19.0 F)
n/a
n/a
Mar
40.0 C (104.0 F)
-5.0 C (23.0 F)
n/a
n/a
Apr
40.6 C (105.1 F)
-1.7 C (28.9 F)
n/a
n/a
May
43.3 C (109.9 F)
5.0 C (41.0 F)
n/a
n/a
Jun
43.9 C (111.0 F)
10.6 C (51.1 F)
n/a
n/a
Jul
42.8 C (109.0 F)
11.7 C (53.1 F)
n/a
n/a
Aug
41.7 C (107.1 F)
11.7 C (53.1 F)
n/a
n/a
Sep
40.6 C (105.1 F)
5.6 C (42.1 F)
n/a
n/a
Oct
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Nov
35.0 C (95.0 F)
-6.7 C (19.9 F)
n/a
n/a
Dec
35.6 C (96.1 F)
-9.4 C (15.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Tlahualilo still stand. 1964 holds the most, with 67.
Standing records at Tlahualilo by the year they were set
Year set
Standing records
1963
33
1964
67
1965
63
1966
32
1967
55
1968
41
1969
49
1970
48
1971
44
1972
25
1973
56
1974
35
1975
35
1976
36
1977
31
1978
17
1979
36
1980
33
1981
17
1982
32
1983
38
1984
30
1985
32
1986
25
1987
28
1988
22
1989
32
1990
27
1991
24
1992
22
1993
19
1994
18
1995
16
1996
32
1997
38
1998
11
1999
17
2000
19
2001
14
2002
32
2003
26
2004
40
2005
34
2006
24
2007
37
2008
22
All-Time Record Progression
2 new records
2 all-time records were set at Tlahualilo between 7 January 1994 and 1 June 2003. Each dot is a new record.
When Tlahualilo set new all-time records
Date
Kind
Detail
1994-01-07
Record low minimum temperature
Record low minimum temperature -9.4 C (15.1 F)
2003-06-01
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
Wettest Day of Each Month
Oct: 99.8 mm (3.9 in)
The wettest day on record for each calendar month at Tlahualilo. The most was 99.8 mm (3.9 in) on 7 October 1989.
Record daily precipitation for each month at Tlahualilo
Month
Record daily precipitation (mm)
Date
Jan
24.1 mm (0.9 in)
1 January 1983
Feb
15.7 mm (0.6 in)
2 February 2003
Mar
22.9 mm (0.9 in)
4 March 1968
Apr
74.9 mm (2.9 in)
21 April 1979
May
61.5 mm (2.4 in)
1 May 1985
Jun
62.0 mm (2.4 in)
13 June 1999
Jul
52.8 mm (2.1 in)
29 July 1999
Aug
62.0 mm (2.4 in)
17 August 1998
Sep
75.9 mm (3.0 in)
20 September 2003
Oct
99.8 mm (3.9 in)
7 October 1989
Nov
22.9 mm (0.9 in)
25 November 1982
Dec
34.8 mm (1.4 in)
16 December 1991
Period of Record Coverage
1963 to 2008
Complete yearUnder 90 percent of days
46 years of record at Tlahualilo, 1963 to 2008. 5 years have data for under 90 percent of days and are left out of rankings: 1963, 1973, 2006, 2007, 2008.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Tlahualilo, 1964 to 2005. Blue stripes are years cooler than the station's own mean of 20.6 C (69.0 F); red stripes are warmer. The coolest year was 1987, at 19.3 C (66.8 F), and the warmest was 2005, at 22.1 C (71.8 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Tlahualilo as warming stripes, 1964 to 2005
Year
Annual mean temperature
Difference from the station mean
1964
21.5 C
+0.95 C
1965
22.0 C
+1.45 C
1966
20.4 C
-0.19 C
1967
21.0 C
+0.39 C
1968
20.4 C
-0.16 C
1969
21.4 C
+0.78 C
1970
20.3 C
-0.25 C
1971
21.0 C
+0.39 C
1972
21.1 C
+0.54 C
1974
20.3 C
-0.27 C
1975
20.4 C
-0.16 C
1976
19.5 C
-1.12 C
1977
20.9 C
+0.29 C
1978
20.4 C
-0.21 C
1979
20.2 C
-0.41 C
1980
20.8 C
+0.26 C
1981
20.5 C
-0.09 C
1982
20.8 C
+0.18 C
1983
20.6 C
+0.01 C
1984
19.7 C
-0.87 C
1985
20.2 C
-0.36 C
1986
20.0 C
-0.61 C
1987
19.3 C
-1.25 C
1988
20.1 C
-0.50 C
1989
20.6 C
+0.03 C
1993
20.5 C
-0.03 C
1994
21.1 C
+0.54 C
1995
20.8 C
+0.25 C
1996
20.4 C
-0.13 C
1997
19.6 C
-0.95 C
1998
20.9 C
+0.34 C
1999
20.5 C
-0.11 C
2000
20.6 C
+0.06 C
2001
20.7 C
+0.10 C
2002
20.5 C
-0.08 C
2003
20.3 C
-0.30 C
2004
20.7 C
+0.08 C
2005
22.1 C
+1.54 C
The fitted trend in annual mean temperature here over 1964 to 2005 is -0.1 C (-0.2 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.4 to 0.2) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Tlahualilo
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.2 to 0.1) per decade
-0.1 F (-0.4 to 0.2) per decade
1964 to 2005
38
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.2) per decade
1964 to 2005
38
Not clearly different from zero
Mean daily minimum
-0.04 C (-0.21 to 0.13) per decade
-0.1 F (-0.4 to 0.2) per decade
1964 to 2005
38
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 Tlahualilo: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
2003
41.1 C (106.0 F)
46
Coldest night (TNn)
-9.4 C (15.1 F)
1994
-6.1 C (21.0 F)
46
Wettest day (Rx1day)
99.8 mm (3.9 in)
1989
39.9 mm (1.6 in)
46
Wettest five days (Rx5day)
113.6 mm (4.5 in)
1986
56.9 mm (2.2 in)
46
Longest dry spell (CDD)
192 days
1975
87 days
46
Hottest day (TXx)
The hottest day of the year at Tlahualilo, 1963 to 2008. The record is 43.9 C (111.0 F) in 2003, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Tlahualilo by year
Year
Hottest day (TXx)
1963
39.4 C (102.9 F)
1964
42.2 C (108.0 F)
1965
41.7 C (107.1 F)
1966
40.6 C (105.1 F)
1967
41.1 C (106.0 F)
1968
40.6 C (105.1 F)
1969
42.2 C (108.0 F)
1970
41.1 C (106.0 F)
1971
40.6 C (105.1 F)
1972
40.0 C (104.0 F)
1973
40.0 C (104.0 F)
1974
40.6 C (105.1 F)
1975
41.7 C (107.1 F)
1976
40.6 C (105.1 F)
1977
40.0 C (104.0 F)
1978
40.6 C (105.1 F)
1979
40.0 C (104.0 F)
1980
41.7 C (107.1 F)
1981
41.7 C (107.1 F)
1982
42.8 C (109.0 F)
1983
41.7 C (107.1 F)
1984
40.6 C (105.1 F)
1985
41.7 C (107.1 F)
1986
40.0 C (104.0 F)
1987
40.6 C (105.1 F)
1988
40.6 C (105.1 F)
1989
43.3 C (109.9 F)
1990
41.1 C (106.0 F)
1991
40.6 C (105.1 F)
1992
42.2 C (108.0 F)
1993
41.1 C (106.0 F)
1994
40.6 C (105.1 F)
1995
40.6 C (105.1 F)
1996
41.7 C (107.1 F)
1997
40.6 C (105.1 F)
1998
42.2 C (108.0 F)
1999
41.1 C (106.0 F)
2000
40.6 C (105.1 F)
2001
40.6 C (105.1 F)
2002
42.8 C (109.0 F)
2003
43.9 C (111.0 F)
2004
42.2 C (108.0 F)
2005
41.7 C (107.1 F)
2006
42.2 C (108.0 F)
2007
41.7 C (107.1 F)
2008
42.8 C (109.0 F)
Coldest night (TNn)
The coldest night of the year at Tlahualilo, 1963 to 2008. The record is -9.4 C (15.1 F) in 1994, marked on the chart; the median year is -6.1 C (21.0 F).
Coldest night (TNn) at Tlahualilo by year
Year
Coldest night (TNn)
1963
-7.8 C (18.0 F)
1964
-8.3 C (17.1 F)
1965
-5.0 C (23.0 F)
1966
-7.2 C (19.0 F)
1967
-7.2 C (19.0 F)
1968
-4.4 C (24.1 F)
1969
-3.9 C (25.0 F)
1970
-6.7 C (19.9 F)
1971
-7.2 C (19.0 F)
1972
-5.0 C (23.0 F)
1973
-8.3 C (17.1 F)
1974
-5.6 C (21.9 F)
1975
-8.3 C (17.1 F)
1976
-7.2 C (19.0 F)
1977
-5.0 C (23.0 F)
1978
-6.1 C (21.0 F)
1979
-7.2 C (19.0 F)
1980
-5.6 C (21.9 F)
1981
-3.3 C (26.1 F)
1982
-6.1 C (21.0 F)
1983
-8.9 C (16.0 F)
1984
-6.7 C (19.9 F)
1985
-7.8 C (18.0 F)
1986
-6.1 C (21.0 F)
1987
-5.6 C (21.9 F)
1988
-6.7 C (19.9 F)
1989
-6.1 C (21.0 F)
1990
-8.3 C (17.1 F)
1991
-3.3 C (26.1 F)
1992
-4.4 C (24.1 F)
1993
0.0 C (32.0 F)
1994
-9.4 C (15.1 F)
1995
-4.4 C (24.1 F)
1996
-8.9 C (16.0 F)
1997
-9.4 C (15.1 F)
1998
-5.0 C (23.0 F)
1999
-5.6 C (21.9 F)
2000
-6.7 C (19.9 F)
2001
-7.8 C (18.0 F)
2002
-6.1 C (21.0 F)
2003
-7.2 C (19.0 F)
2004
-6.1 C (21.0 F)
2005
-6.1 C (21.0 F)
2006
-3.3 C (26.1 F)
2007
-6.1 C (21.0 F)
2008
-3.3 C (26.1 F)
Wettest day (Rx1day)
The wettest day of the year at Tlahualilo, 1963 to 2008. The record is 99.8 mm (3.9 in) in 1989, marked on the chart; the median year is 39.9 mm (1.6 in).
Wettest day (Rx1day) at Tlahualilo by year
Year
Wettest day (Rx1day)
1963
41.9 mm (1.6 in)
1964
34.3 mm (1.4 in)
1965
40.9 mm (1.6 in)
1966
42.9 mm (1.7 in)
1967
25.4 mm (1.0 in)
1968
23.9 mm (0.9 in)
1969
16.3 mm (0.6 in)
1970
53.3 mm (2.1 in)
1971
26.9 mm (1.1 in)
1972
50.3 mm (2.0 in)
1973
26.4 mm (1.0 in)
1974
15.5 mm (0.6 in)
1975
38.9 mm (1.5 in)
1976
29.0 mm (1.1 in)
1977
33.8 mm (1.3 in)
1978
31.8 mm (1.3 in)
1979
74.9 mm (2.9 in)
1980
52.8 mm (2.1 in)
1981
33.8 mm (1.3 in)
1982
31.0 mm (1.2 in)
1983
28.4 mm (1.1 in)
1984
36.8 mm (1.4 in)
1985
61.5 mm (2.4 in)
1986
48.8 mm (1.9 in)
1987
19.8 mm (0.8 in)
1988
47.8 mm (1.9 in)
1989
99.8 mm (3.9 in)
1990
60.5 mm (2.4 in)
1991
50.8 mm (2.0 in)
1992
57.9 mm (2.3 in)
1993
54.9 mm (2.2 in)
1994
36.3 mm (1.4 in)
1995
59.9 mm (2.4 in)
1996
27.9 mm (1.1 in)
1997
54.9 mm (2.2 in)
1998
62.0 mm (2.4 in)
1999
62.0 mm (2.4 in)
2000
63.0 mm (2.5 in)
2001
26.9 mm (1.1 in)
2002
26.4 mm (1.0 in)
2003
75.9 mm (3.0 in)
2004
47.0 mm (1.9 in)
2005
46.5 mm (1.8 in)
2006
27.4 mm (1.1 in)
2007
15.7 mm (0.6 in)
2008
20.8 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Tlahualilo, 1963 to 2008. The record is 113.6 mm (4.5 in) in 1986, marked on the chart; the median year is 56.9 mm (2.2 in).
Wettest five days (Rx5day) at Tlahualilo by year
Year
Wettest five days (Rx5day)
1963
63.0 mm (2.5 in)
1964
47.5 mm (1.9 in)
1965
41.0 mm (1.6 in)
1966
51.8 mm (2.0 in)
1967
35.3 mm (1.4 in)
1968
38.7 mm (1.5 in)
1969
30.7 mm (1.2 in)
1970
89.9 mm (3.5 in)
1971
62.7 mm (2.5 in)
1972
92.3 mm (3.6 in)
1973
48.3 mm (1.9 in)
1974
36.1 mm (1.4 in)
1975
50.4 mm (2.0 in)
1976
34.0 mm (1.3 in)
1977
55.7 mm (2.2 in)
1978
58.5 mm (2.3 in)
1979
74.9 mm (2.9 in)
1980
93.8 mm (3.7 in)
1981
70.9 mm (2.8 in)
1982
56.6 mm (2.2 in)
1983
57.9 mm (2.3 in)
1984
59.9 mm (2.4 in)
1985
64.3 mm (2.5 in)
1986
113.6 mm (4.5 in)
1987
57.2 mm (2.3 in)
1988
47.8 mm (1.9 in)
1989
108.7 mm (4.3 in)
1990
63.5 mm (2.5 in)
1991
81.1 mm (3.2 in)
1992
61.5 mm (2.4 in)
1993
65.8 mm (2.6 in)
1994
36.6 mm (1.4 in)
1995
111.2 mm (4.4 in)
1996
40.6 mm (1.6 in)
1997
55.7 mm (2.2 in)
1998
99.3 mm (3.9 in)
1999
65.1 mm (2.6 in)
2000
73.9 mm (2.9 in)
2001
28.2 mm (1.1 in)
2002
41.2 mm (1.6 in)
2003
98.0 mm (3.9 in)
2004
49.1 mm (1.9 in)
2005
51.6 mm (2.0 in)
2006
28.7 mm (1.1 in)
2007
32.7 mm (1.3 in)
2008
26.9 mm (1.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Tlahualilo, 1963 to 2008. The record is 192 days in 1975, marked on the chart; the median year is 87 days.
Longest dry spell (CDD) at Tlahualilo by year
Year
Longest dry spell (CDD)
1963
25 days
1964
106 days
1965
86 days
1966
87 days
1967
70 days
1968
67 days
1969
86 days
1970
91 days
1971
132 days
1972
130 days
1973
80 days
1974
75 days
1975
192 days
1976
99 days
1977
94 days
1978
96 days
1979
86 days
1980
70 days
1981
41 days
1982
68 days
1983
114 days
1984
68 days
1985
85 days
1986
113 days
1987
70 days
1988
95 days
1989
81 days
1990
77 days
1991
99 days
1992
100 days
1993
110 days
1994
78 days
1995
104 days
1996
129 days
1997
49 days
1998
158 days
1999
86 days
2000
111 days
2001
73 days
2002
111 days
2003
54 days
2004
50 days
2005
79 days
2006
107 days
2007
92 days
2008
91 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Tlahualilo falls on 6 March and the median first autumn frost on 25 November, which leaves a median of 261 days between them.
Fitted over all years, the growing season changes by +3.7 days per decade at this station.
Frost dates and growing season at Tlahualilo
Measure
Median, all years
Earliest period
Recent period (1971 to 2005)
Recent against earliest
Fitted trend
Last spring frost
6 March
n/a
7 March
n/a
-2.9 days per decade
First autumn frost
25 November
n/a
25 November
n/a
+0.7 days per decade
Growing days
261 days
n/a
262 days
n/a
+3.7 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
41 years, 1964 to 2005
A day with at least 42.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 95.2 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Tlahualilo: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
42.1 mm (1.7 in)
5 years
58.5 mm (2.3 in)
10 years
68.4 mm (2.7 in)
25 years
80.0 mm (3.1 in)
50 years
87.9 mm (3.5 in)
Longer than the 41 years of record
100 years
95.2 mm (3.7 in)
Longer than the 41 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, 41 years of values from 1964 to 2005.
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 1989; 75.9 mm (3.0 in) in 2003; 74.9 mm (2.9 in) in 1979.
Download the Data
Data for Tlahualilo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tlahualilo 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.