Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Samalayuca. 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 Samalayuca, 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)
-20.0 C (-4.0 F)
n/a
n/a
Feb
31.7 C (89.1 F)
-15.0 C (5.0 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-10.6 C (12.9 F)
n/a
n/a
Apr
39.4 C (102.9 F)
-6.1 C (21.0 F)
n/a
n/a
May
45.0 C (113.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jun
45.6 C (114.1 F)
5.6 C (42.1 F)
n/a
n/a
Jul
45.0 C (113.0 F)
9.4 C (48.9 F)
n/a
n/a
Aug
43.9 C (111.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
42.8 C (109.0 F)
3.9 C (39.0 F)
n/a
n/a
Oct
38.3 C (100.9 F)
-5.0 C (23.0 F)
n/a
n/a
Nov
37.2 C (99.0 F)
-15.0 C (5.0 F)
n/a
n/a
Dec
30.6 C (87.1 F)
-18.3 C (-0.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Samalayuca still stand. 1958 holds the most, with 83.
Standing records at Samalayuca by the year they were set
Year set
Standing records
1946
1
1947
19
1948
33
1949
26
1950
23
1951
46
1952
20
1953
31
1954
15
1955
39
1956
30
1957
27
1958
83
1959
62
1960
45
1961
20
1962
40
1963
27
1964
22
1965
21
1966
20
1967
25
1968
17
1969
32
1970
24
1971
22
1972
28
1973
24
1974
19
1975
23
1976
46
1977
19
1978
33
1979
28
1980
43
1981
22
1982
27
1983
35
1984
27
1985
11
1986
21
1987
26
1988
28
1989
49
1990
13
1991
16
1992
20
1993
17
1994
30
1995
24
1996
26
1997
20
1998
6
1999
13
All-Time Record Progression
3 new records
3 all-time records were set at Samalayuca between 22 June 1981 and 27 June 1994. Each dot is a new record.
When Samalayuca set new all-time records
Date
Kind
Detail
1981-06-22
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
1986-12-17
Record daily precipitation
Record daily precipitation 104.9 mm (4.1 in)
1994-06-27
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
Wettest Day of Each Month
Dec: 104.9 mm (4.1 in)
The wettest day on record for each calendar month at Samalayuca. The most was 104.9 mm (4.1 in) on 17 December 1986.
Record daily precipitation for each month at Samalayuca
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
6 January 1973
Feb
24.4 mm (1.0 in)
15 February 1995
Mar
25.4 mm (1.0 in)
4 March 1965
Apr
15.0 mm (0.6 in)
21 April 1953
May
37.8 mm (1.5 in)
1 May 1981
Jun
45.5 mm (1.8 in)
1 June 1948
Jul
66.8 mm (2.6 in)
13 July 1991
Aug
50.8 mm (2.0 in)
10 August 1991
Sep
77.0 mm (3.0 in)
26 September 1958
Oct
37.8 mm (1.5 in)
3 October 1977
Nov
23.9 mm (0.9 in)
2 November 1986
Dec
104.9 mm (4.1 in)
17 December 1986
Period of Record Coverage
1946 to 1999
Complete yearUnder 90 percent of days
54 years of record at Samalayuca, 1946 to 1999. 3 years have data for under 90 percent of days and are left out of rankings: 1946, 1957, 1990.
Cooler than the station meanWarmer than the station mean
One stripe for each of 46 complete years at Samalayuca, 1947 to 1999. Blue stripes are years cooler than the station's own mean of 17.1 C (62.8 F); red stripes are warmer. The coolest year was 1976, at 14.8 C (58.7 F), and the warmest was 1989, at 19.2 C (66.5 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Samalayuca as warming stripes, 1947 to 1999
Year
Annual mean temperature
Difference from the station mean
1947
16.6 C
-0.50 C
1948
16.6 C
-0.49 C
1949
16.4 C
-0.74 C
1950
17.7 C
+0.56 C
1951
17.1 C
-0.04 C
1952
16.6 C
-0.56 C
1953
16.3 C
-0.82 C
1954
17.2 C
+0.07 C
1955
15.7 C
-1.41 C
1956
16.0 C
-1.15 C
1958
17.4 C
+0.30 C
1959
17.5 C
+0.42 C
1960
17.6 C
+0.44 C
1961
17.9 C
+0.81 C
1962
18.3 C
+1.21 C
1963
18.2 C
+1.09 C
1964
16.6 C
-0.53 C
1965
18.0 C
+0.83 C
1966
17.7 C
+0.57 C
1967
18.0 C
+0.85 C
1969
18.3 C
+1.18 C
1970
17.4 C
+0.24 C
1971
17.4 C
+0.31 C
1972
17.0 C
-0.08 C
1973
15.7 C
-1.43 C
1974
16.4 C
-0.70 C
1976
14.8 C
-2.31 C
1977
16.5 C
-0.59 C
1978
16.2 C
-0.92 C
1980
17.2 C
+0.06 C
1981
17.0 C
-0.11 C
1982
15.8 C
-1.35 C
1983
15.5 C
-1.58 C
1984
15.6 C
-1.53 C
1985
16.2 C
-0.95 C
1986
16.6 C
-0.52 C
1987
17.4 C
+0.30 C
1988
18.5 C
+1.39 C
1989
19.2 C
+2.06 C
1991
17.9 C
+0.74 C
1992
17.8 C
+0.72 C
1994
18.7 C
+1.59 C
1995
19.1 C
+1.97 C
1996
18.9 C
+1.78 C
1997
16.2 C
-0.90 C
1999
16.7 C
-0.39 C
The fitted trend in annual mean temperature here over 1947 to 1999 is 0.1 C (-0.1 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.6) 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 Samalayuca
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.3) per decade
0.2 F (-0.1 to 0.6) per decade
1947 to 1999
46
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.5 to 0.2) per decade
-0.3 F (-0.8 to 0.3) per decade
1947 to 1999
46
Not clearly different from zero
Mean daily minimum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.3 to 1.1) per decade
1947 to 1999
46
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
1946 to 1999
Yearly extremes at Samalayuca: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.6 C (114.1 F)
1994
41.7 C (107.1 F)
54
Coldest night (TNn)
-20.0 C (-4.0 F)
1949
-11.9 C (10.5 F)
54
Wettest day (Rx1day)
104.9 mm (4.1 in)
1986
30.0 mm (1.2 in)
54
Wettest five days (Rx5day)
164.6 mm (6.5 in)
1986
44.2 mm (1.7 in)
54
Longest dry spell (CDD)
152 days
1967
63 days
54
Hottest day (TXx)
The hottest day of the year at Samalayuca, 1946 to 1999. The record is 45.6 C (114.1 F) in 1994, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Samalayuca by year
Year
Hottest day (TXx)
1946
25.0 C (77.0 F)
1947
42.8 C (109.0 F)
1948
43.3 C (109.9 F)
1949
41.1 C (106.0 F)
1950
42.8 C (109.0 F)
1951
43.9 C (111.0 F)
1952
41.1 C (106.0 F)
1953
43.9 C (111.0 F)
1954
41.7 C (107.1 F)
1955
40.6 C (105.1 F)
1956
40.0 C (104.0 F)
1957
41.7 C (107.1 F)
1958
45.0 C (113.0 F)
1959
43.9 C (111.0 F)
1960
45.0 C (113.0 F)
1961
41.7 C (107.1 F)
1962
41.7 C (107.1 F)
1963
42.8 C (109.0 F)
1964
43.3 C (109.9 F)
1965
42.8 C (109.0 F)
1966
42.2 C (108.0 F)
1967
41.7 C (107.1 F)
1968
43.3 C (109.9 F)
1969
43.9 C (111.0 F)
1970
43.9 C (111.0 F)
1971
41.7 C (107.1 F)
1972
42.8 C (109.0 F)
1973
39.4 C (102.9 F)
1974
40.6 C (105.1 F)
1975
38.9 C (102.0 F)
1976
35.6 C (96.1 F)
1977
40.0 C (104.0 F)
1978
41.7 C (107.1 F)
1979
38.9 C (102.0 F)
1980
42.8 C (109.0 F)
1981
40.6 C (105.1 F)
1982
40.6 C (105.1 F)
1983
40.0 C (104.0 F)
1984
40.0 C (104.0 F)
1985
40.6 C (105.1 F)
1986
39.4 C (102.9 F)
1987
42.2 C (108.0 F)
1988
40.6 C (105.1 F)
1989
43.9 C (111.0 F)
1990
35.6 C (96.1 F)
1991
43.9 C (111.0 F)
1992
43.3 C (109.9 F)
1993
41.7 C (107.1 F)
1994
45.6 C (114.1 F)
1995
43.9 C (111.0 F)
1996
43.9 C (111.0 F)
1997
40.0 C (104.0 F)
1998
40.0 C (104.0 F)
1999
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Samalayuca, 1946 to 1999. The record is -20.0 C (-4.0 F) in 1949, marked on the chart; the median year is -11.9 C (10.5 F).
Coldest night (TNn) at Samalayuca by year
Year
Coldest night (TNn)
1946
-9.4 C (15.1 F)
1947
-15.6 C (3.9 F)
1948
-17.2 C (1.0 F)
1949
-20.0 C (-4.0 F)
1950
-12.8 C (9.0 F)
1951
-14.4 C (6.1 F)
1952
-11.7 C (10.9 F)
1953
-18.3 C (-0.9 F)
1954
-12.2 C (10.0 F)
1955
-13.3 C (8.1 F)
1956
-15.0 C (5.0 F)
1957
-15.0 C (5.0 F)
1958
-15.0 C (5.0 F)
1959
-13.9 C (7.0 F)
1960
-13.3 C (8.1 F)
1961
-5.0 C (23.0 F)
1962
-20.0 C (-4.0 F)
1963
-12.2 C (10.0 F)
1964
-13.3 C (8.1 F)
1965
-10.6 C (12.9 F)
1966
-11.1 C (12.0 F)
1967
-16.1 C (3.0 F)
1968
-11.1 C (12.0 F)
1969
-10.0 C (14.0 F)
1970
-13.3 C (8.1 F)
1971
-14.4 C (6.1 F)
1972
-12.8 C (9.0 F)
1973
-11.1 C (12.0 F)
1974
-12.2 C (10.0 F)
1975
-9.4 C (15.1 F)
1976
-10.0 C (14.0 F)
1977
-11.1 C (12.0 F)
1978
-14.4 C (6.1 F)
1979
-8.9 C (16.0 F)
1980
-8.3 C (17.1 F)
1981
-9.4 C (15.1 F)
1982
-12.2 C (10.0 F)
1983
-12.8 C (9.0 F)
1984
-10.6 C (12.9 F)
1985
-13.3 C (8.1 F)
1986
-9.4 C (15.1 F)
1987
-10.6 C (12.9 F)
1988
-10.6 C (12.9 F)
1989
-14.4 C (6.1 F)
1990
-10.6 C (12.9 F)
1991
-7.2 C (19.0 F)
1992
-7.2 C (19.0 F)
1993
-5.0 C (23.0 F)
1994
-10.6 C (12.9 F)
1995
-6.1 C (21.0 F)
1996
-11.7 C (10.9 F)
1997
-13.9 C (7.0 F)
1998
-7.2 C (19.0 F)
1999
-11.7 C (10.9 F)
Wettest day (Rx1day)
The wettest day of the year at Samalayuca, 1946 to 1999. The record is 104.9 mm (4.1 in) in 1986, marked on the chart; the median year is 30.0 mm (1.2 in).
Wettest day (Rx1day) at Samalayuca by year
Year
Wettest day (Rx1day)
1946
9.9 mm (0.39 in)
1947
18.8 mm (0.7 in)
1948
45.5 mm (1.8 in)
1949
39.9 mm (1.6 in)
1950
16.3 mm (0.6 in)
1951
10.9 mm (0.4 in)
1952
21.8 mm (0.9 in)
1953
21.8 mm (0.9 in)
1954
17.8 mm (0.7 in)
1955
30.0 mm (1.2 in)
1956
22.9 mm (0.9 in)
1957
16.8 mm (0.7 in)
1958
77.0 mm (3.0 in)
1959
29.5 mm (1.2 in)
1960
30.0 mm (1.2 in)
1961
32.8 mm (1.3 in)
1962
41.9 mm (1.6 in)
1963
21.8 mm (0.9 in)
1964
13.0 mm (0.5 in)
1965
39.9 mm (1.6 in)
1966
36.8 mm (1.4 in)
1967
31.8 mm (1.3 in)
1968
54.4 mm (2.1 in)
1969
31.0 mm (1.2 in)
1970
64.8 mm (2.6 in)
1971
18.8 mm (0.7 in)
1972
30.0 mm (1.2 in)
1973
57.9 mm (2.3 in)
1974
75.9 mm (3.0 in)
1975
30.0 mm (1.2 in)
1976
29.0 mm (1.1 in)
1977
37.8 mm (1.5 in)
1978
34.8 mm (1.4 in)
1979
26.4 mm (1.0 in)
1980
59.9 mm (2.4 in)
1981
37.8 mm (1.5 in)
1982
57.4 mm (2.3 in)
1983
23.4 mm (0.9 in)
1984
35.8 mm (1.4 in)
1985
24.9 mm (1.0 in)
1986
104.9 mm (4.1 in)
1987
21.3 mm (0.8 in)
1988
26.9 mm (1.1 in)
1989
27.4 mm (1.1 in)
1990
13.5 mm (0.5 in)
1991
66.8 mm (2.6 in)
1992
37.8 mm (1.5 in)
1993
30.0 mm (1.2 in)
1994
23.9 mm (0.9 in)
1995
27.9 mm (1.1 in)
1996
39.9 mm (1.6 in)
1997
29.5 mm (1.2 in)
1998
5.8 mm (0.23 in)
1999
46.0 mm (1.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Samalayuca, 1946 to 1999. The record is 164.6 mm (6.5 in) in 1986, marked on the chart; the median year is 44.2 mm (1.7 in).
Wettest five days (Rx5day) at Samalayuca by year
Year
Wettest five days (Rx5day)
1946
14.7 mm (0.6 in)
1947
37.3 mm (1.5 in)
1948
45.8 mm (1.8 in)
1949
52.3 mm (2.1 in)
1950
32.1 mm (1.3 in)
1951
21.4 mm (0.8 in)
1952
28.4 mm (1.1 in)
1953
21.8 mm (0.9 in)
1954
27.9 mm (1.1 in)
1955
36.6 mm (1.4 in)
1956
46.0 mm (1.8 in)
1957
28.5 mm (1.1 in)
1958
106.5 mm (4.2 in)
1959
56.4 mm (2.2 in)
1960
62.5 mm (2.5 in)
1961
46.3 mm (1.8 in)
1962
75.4 mm (3.0 in)
1963
43.5 mm (1.7 in)
1964
19.6 mm (0.8 in)
1965
55.6 mm (2.2 in)
1966
90.9 mm (3.6 in)
1967
35.6 mm (1.4 in)
1968
90.5 mm (3.6 in)
1969
36.6 mm (1.4 in)
1970
64.8 mm (2.6 in)
1971
18.8 mm (0.7 in)
1972
45.8 mm (1.8 in)
1973
79.0 mm (3.1 in)
1974
161.4 mm (6.4 in)
1975
30.8 mm (1.2 in)
1976
32.7 mm (1.3 in)
1977
44.4 mm (1.7 in)
1978
40.1 mm (1.6 in)
1979
48.8 mm (1.9 in)
1980
64.7 mm (2.5 in)
1981
62.2 mm (2.4 in)
1982
60.0 mm (2.4 in)
1983
25.5 mm (1.0 in)
1984
88.9 mm (3.5 in)
1985
44.0 mm (1.7 in)
1986
164.6 mm (6.5 in)
1987
26.4 mm (1.0 in)
1988
49.5 mm (1.9 in)
1989
27.4 mm (1.1 in)
1990
15.8 mm (0.6 in)
1991
77.5 mm (3.1 in)
1992
48.0 mm (1.9 in)
1993
31.3 mm (1.2 in)
1994
25.2 mm (1.0 in)
1995
32.5 mm (1.3 in)
1996
69.9 mm (2.8 in)
1997
38.1 mm (1.5 in)
1998
5.8 mm (0.23 in)
1999
70.6 mm (2.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Samalayuca, 1946 to 1999. The record is 152 days in 1967, marked on the chart; the median year is 63 days.
Longest dry spell (CDD) at Samalayuca by year
Year
Longest dry spell (CDD)
1946
21 days
1947
52 days
1948
96 days
1949
50 days
1950
124 days
1951
62 days
1952
54 days
1953
80 days
1954
61 days
1955
104 days
1956
142 days
1957
91 days
1958
34 days
1959
75 days
1960
77 days
1961
75 days
1962
113 days
1963
121 days
1964
56 days
1965
50 days
1966
84 days
1967
152 days
1968
52 days
1969
44 days
1970
89 days
1971
107 days
1972
84 days
1973
37 days
1974
107 days
1975
60 days
1976
61 days
1977
63 days
1978
55 days
1979
63 days
1980
63 days
1981
39 days
1982
66 days
1983
77 days
1984
128 days
1985
60 days
1986
75 days
1987
52 days
1988
56 days
1989
66 days
1990
39 days
1991
46 days
1992
36 days
1993
43 days
1994
32 days
1995
68 days
1996
68 days
1997
39 days
1998
44 days
1999
67 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
46 years with a frost
Across 46 years with a frost, the median last spring frost at Samalayuca falls on 7 April and the median first autumn frost on 2 November, which leaves a median of 208 days between them.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
Frost dates and growing season at Samalayuca
Measure
Median, all years
Earliest period
Recent period (1964 to 1999)
Recent against earliest
Fitted trend
Last spring frost
7 April
n/a
5 April
n/a
-1.2 days per decade
First autumn frost
2 November
n/a
2 November
n/a
+0.4 days per decade
Growing days
208 days
n/a
213 days
n/a
+1.6 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
51 years, 1947 to 1999
A day with at least 31.2 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 108.0 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Samalayuca: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.2 mm (1.2 in)
5 years
46.3 mm (1.8 in)
10 years
58.2 mm (2.3 in)
25 years
75.8 mm (3.0 in)
50 years
90.9 mm (3.6 in)
100 years
108.0 mm (4.3 in)
Longer than the 51 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, 51 years of values from 1947 to 1999.
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: 104.9 mm (4.1 in) in 1986; 77.0 mm (3.0 in) in 1958; 75.9 mm (3.0 in) in 1974.
Download the Data
Data for Samalayuca standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Samalayuca 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.