Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Mercedes. The lines show the 2026 daily maximum and minimum. 5 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Mercedes, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
43.0 C (109.4 F)
5.9 C (42.6 F)
38.7 C (101.7 F)
11.6 C (52.9 F)
Feb
41.0 C (105.8 F)
5.3 C (41.5 F)
38.9 C (102.0 F)
12.6 C (54.7 F)
Mar
41.0 C (105.8 F)
2.0 C (35.6 F)
36.5 C (97.7 F)
8.1 C (46.6 F)
Apr
37.2 C (99.0 F)
-1.0 C (30.2 F)
27.9 C (82.2 F)
2.9 C (37.2 F)
May
32.2 C (90.0 F)
-4.3 C (24.3 F)
28.4 C (83.1 F)
1.3 C (34.3 F)
Jun
30.2 C (86.4 F)
-8.2 C (17.2 F)
19.4 C (66.9 F)
-3.6 C (25.5 F)
Jul
30.5 C (86.9 F)
-7.6 C (18.3 F)
25.4 C (77.7 F)
-5.8 C (21.6 F)
Aug
33.0 C (91.4 F)
-8.0 C (17.6 F)
22.1 C (71.8 F)
-1.5 C (29.3 F)
Sep
36.1 C (97.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
37.0 C (98.6 F)
-1.0 C (30.2 F)
n/a
n/a
Nov
39.0 C (102.2 F)
2.5 C (36.5 F)
n/a
n/a
Dec
42.0 C (107.6 F)
2.9 C (37.2 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mercedes still stand. 1935 holds the most, with 41.
Standing records at Mercedes by the year they were set
Year set
Standing records
1931
33
1932
18
1933
32
1934
29
1935
41
1936
16
1937
26
1938
26
1939
18
1940
23
1941
18
1942
19
1943
29
1944
25
1945
24
1946
14
1947
15
1948
15
1949
12
1950
20
1951
26
1952
26
1953
19
1954
12
1955
15
1956
10
1957
14
1958
18
1959
14
1960
13
1961
7
1962
16
1963
12
1964
19
1965
22
1966
13
1967
15
1968
12
1969
11
1970
26
1971
21
1972
15
1973
10
1974
12
1975
12
1976
21
1977
13
1978
7
1979
26
1980
30
1981
17
1982
10
1983
15
1984
18
1985
8
1986
7
1987
12
1988
15
1989
9
1990
14
1991
18
1992
14
1993
17
1994
16
1995
14
1996
17
1997
7
2001
12
2002
16
2003
10
2004
20
2005
10
2006
15
2007
10
2010
16
2011
4
2012
24
2013
16
2014
8
2015
12
2016
4
2017
9
2018
24
2019
16
2020
19
2021
12
2022
11
2023
2
2024
15
2025
11
All-Time Record Progression
4 new records
4 all-time records were set at Mercedes between 14 June 1967 and 19 June 2015. Each dot is a new record.
When Mercedes set new all-time records
Date
Kind
Detail
1967-06-14
Record low minimum temperature
Record low minimum temperature -7.0 C (19.4 F)
1993-08-09
Record low minimum temperature
Record low minimum temperature -8.0 C (17.6 F)
2002-03-29
Record daily precipitation
Record daily precipitation 180.1 mm (7.1 in)
2015-06-19
Record low minimum temperature
Record low minimum temperature -8.2 C (17.2 F)
Wettest Day of Each Month
Mar: 180.1 mm (7.1 in)
The wettest day on record for each calendar month at Mercedes. The most was 180.1 mm (7.1 in) on 29 March 2002.
Record daily precipitation for each month at Mercedes
Month
Record daily precipitation (mm)
Date
Jan
171.0 mm (6.7 in)
4 January 1958
Feb
163.0 mm (6.4 in)
29 February 1964
Mar
180.1 mm (7.1 in)
29 March 2002
Apr
124.0 mm (4.9 in)
22 April 2004
May
158.0 mm (6.2 in)
14 May 1970
Jun
160.0 mm (6.3 in)
25 June 2006
Jul
119.0 mm (4.7 in)
22 July 1931
Aug
95.0 mm (3.7 in)
31 August 1956
Sep
83.1 mm (3.3 in)
14 September 2014
Oct
125.0 mm (4.9 in)
16 October 2004
Nov
114.0 mm (4.5 in)
25 November 1963
Dec
128.0 mm (5.0 in)
15 December 1968
Period of Record Coverage
1931 to 2025
Complete yearUnder 90 percent of days
93 years of record at Mercedes, 1931 to 2025. 32 years have data for under 90 percent of days and are left out of rankings: 1960, 1962, 1963, 1967, 1996, 1997, 1998, 1999 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Mercedes, 1931 to 1995. Blue stripes are years cooler than the station's own mean of 17.3 C (63.1 F); red stripes are warmer. The coolest year was 1937, at 15.7 C (60.3 F), and the warmest was 1953, at 18.3 C (65.0 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Mercedes as warming stripes, 1931 to 1995
Year
Annual mean temperature
Difference from the station mean
1931
16.6 C
-0.71 C
1935
16.2 C
-1.07 C
1936
16.4 C
-0.84 C
1937
15.7 C
-1.54 C
1938
16.5 C
-0.75 C
1939
16.7 C
-0.56 C
1940
17.2 C
-0.06 C
1941
17.0 C
-0.30 C
1943
18.3 C
+1.07 C
1944
18.3 C
+1.06 C
1945
18.2 C
+0.93 C
1947
17.1 C
-0.16 C
1948
17.6 C
+0.32 C
1953
18.3 C
+1.07 C
1956
17.3 C
+0.08 C
1958
17.8 C
+0.56 C
1959
17.1 C
-0.16 C
1969
17.3 C
+0.06 C
1970
17.7 C
+0.44 C
1971
17.1 C
-0.13 C
1972
17.5 C
+0.24 C
1973
17.2 C
-0.09 C
1974
17.1 C
-0.14 C
1975
17.2 C
-0.02 C
1976
16.7 C
-0.53 C
1977
17.8 C
+0.56 C
1978
17.4 C
+0.11 C
1979
17.5 C
+0.28 C
1980
18.2 C
+0.89 C
1981
17.8 C
+0.49 C
1982
17.8 C
+0.58 C
1983
17.2 C
-0.07 C
1984
16.9 C
-0.40 C
1985
17.2 C
-0.07 C
1986
17.4 C
+0.17 C
1987
17.1 C
-0.12 C
1988
16.2 C
-1.04 C
1989
17.5 C
+0.23 C
1990
17.3 C
+0.02 C
1991
17.3 C
+0.05 C
1992
17.0 C
-0.29 C
1993
16.9 C
-0.40 C
1994
17.7 C
+0.44 C
1995
17.0 C
-0.25 C
The fitted trend in annual mean temperature here over 1931 to 1995 is 0.05 C (-0.04 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) 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 Mercedes
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.04 to 0.14) per decade
0.1 F (-0.1 to 0.2) per decade
1931 to 1995
44
Not clearly different from zero
Mean daily maximum
0.02 C (-0.07 to 0.11) per decade
0.03 F (-0.13 to 0.20) per decade
1931 to 1995
44
Not clearly different from zero
Mean daily minimum
0.07 C (-0.04 to 0.19) per decade
0.1 F (-0.1 to 0.3) per decade
1931 to 1995
44
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
1931 to 2025
Yearly extremes at Mercedes: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.0 C (109.4 F)
1934
38.8 C (101.8 F)
93
Coldest night (TNn)
-8.2 C (17.2 F)
2015
-3.9 C (25.0 F)
93
Wettest day (Rx1day)
180.1 mm (7.1 in)
2002
82.0 mm (3.2 in)
93
Wettest five days (Rx5day)
293.0 mm (11.5 in)
1978
128.3 mm (5.0 in)
90
Longest dry spell (CDD)
172 days
1995
25 days
93
Hottest day (TXx)
The hottest day of the year at Mercedes, 1931 to 2025. The record is 43.0 C (109.4 F) in 1934, marked on the chart; the median year is 38.8 C (101.8 F).
Hottest day (TXx) at Mercedes by year
Year
Hottest day (TXx)
1931
41.0 C (105.8 F)
1932
41.0 C (105.8 F)
1933
41.0 C (105.8 F)
1934
43.0 C (109.4 F)
1935
40.0 C (104.0 F)
1936
37.0 C (98.6 F)
1937
37.0 C (98.6 F)
1938
40.0 C (104.0 F)
1939
40.0 C (104.0 F)
1940
39.0 C (102.2 F)
1941
35.0 C (95.0 F)
1942
41.0 C (105.8 F)
1943
42.0 C (107.6 F)
1944
42.0 C (107.6 F)
1945
41.0 C (105.8 F)
1946
38.0 C (100.4 F)
1947
39.0 C (102.2 F)
1948
41.0 C (105.8 F)
1949
40.0 C (104.0 F)
1950
38.0 C (100.4 F)
1951
39.0 C (102.2 F)
1952
40.0 C (104.0 F)
1953
40.0 C (104.0 F)
1954
38.0 C (100.4 F)
1955
39.0 C (102.2 F)
1956
40.0 C (104.0 F)
1957
41.0 C (105.8 F)
1958
39.0 C (102.2 F)
1959
36.0 C (96.8 F)
1960
39.0 C (102.2 F)
1961
38.0 C (100.4 F)
1962
39.0 C (102.2 F)
1963
37.0 C (98.6 F)
1964
39.0 C (102.2 F)
1965
39.0 C (102.2 F)
1966
34.0 C (93.2 F)
1967
38.0 C (100.4 F)
1968
38.0 C (100.4 F)
1969
37.0 C (98.6 F)
1970
39.2 C (102.6 F)
1971
38.3 C (100.9 F)
1972
38.0 C (100.4 F)
1973
36.8 C (98.2 F)
1974
37.6 C (99.7 F)
1975
38.6 C (101.5 F)
1976
37.6 C (99.7 F)
1977
36.5 C (97.7 F)
1978
37.5 C (99.5 F)
1979
38.8 C (101.8 F)
1980
39.9 C (103.8 F)
1981
36.4 C (97.5 F)
1982
38.0 C (100.4 F)
1983
40.2 C (104.4 F)
1984
37.0 C (98.6 F)
1985
37.0 C (98.6 F)
1986
39.0 C (102.2 F)
1987
39.0 C (102.2 F)
1988
37.0 C (98.6 F)
1989
38.0 C (100.4 F)
1990
40.0 C (104.0 F)
1991
36.0 C (96.8 F)
1992
35.0 C (95.0 F)
1993
37.0 C (98.6 F)
1994
39.0 C (102.2 F)
1995
40.0 C (104.0 F)
1996
39.0 C (102.2 F)
1997
37.0 C (98.6 F)
1998
24.8 C (76.6 F)
1999
27.9 C (82.2 F)
2000
n/a
2001
36.2 C (97.2 F)
2002
35.8 C (96.4 F)
2003
40.0 C (104.0 F)
2004
37.5 C (99.5 F)
2005
39.4 C (102.9 F)
2006
41.3 C (106.3 F)
2007
35.0 C (95.0 F)
2009
27.1 C (80.8 F)
2010
39.0 C (102.2 F)
2011
39.1 C (102.4 F)
2012
41.5 C (106.7 F)
2013
41.7 C (107.1 F)
2014
38.5 C (101.3 F)
2015
37.0 C (98.6 F)
2016
36.2 C (97.2 F)
2017
37.0 C (98.6 F)
2018
38.8 C (101.8 F)
2019
38.4 C (101.1 F)
2020
38.1 C (100.6 F)
2021
39.7 C (103.5 F)
2022
42.7 C (108.9 F)
2023
35.0 C (95.0 F)
2024
38.3 C (100.9 F)
2025
38.9 C (102.0 F)
Coldest night (TNn)
The coldest night of the year at Mercedes, 1931 to 2025. The record is -8.2 C (17.2 F) in 2015, marked on the chart; the median year is -3.9 C (25.0 F).
Coldest night (TNn) at Mercedes by year
Year
Coldest night (TNn)
1931
-4.0 C (24.8 F)
1932
0.0 C (32.0 F)
1933
-4.0 C (24.8 F)
1934
-3.0 C (26.6 F)
1935
-6.0 C (21.2 F)
1936
-3.0 C (26.6 F)
1937
-4.0 C (24.8 F)
1938
-2.0 C (28.4 F)
1939
-2.0 C (28.4 F)
1940
-3.0 C (26.6 F)
1941
-1.0 C (30.2 F)
1942
-5.0 C (23.0 F)
1943
-2.0 C (28.4 F)
1944
-5.0 C (23.0 F)
1945
-5.0 C (23.0 F)
1946
-2.0 C (28.4 F)
1947
-3.0 C (26.6 F)
1948
-5.0 C (23.0 F)
1949
-3.0 C (26.6 F)
1950
0.0 C (32.0 F)
1951
-3.0 C (26.6 F)
1952
-1.0 C (30.2 F)
1953
-3.0 C (26.6 F)
1954
0.0 C (32.0 F)
1955
-3.0 C (26.6 F)
1956
-2.0 C (28.4 F)
1957
-3.0 C (26.6 F)
1958
-3.0 C (26.6 F)
1959
-1.0 C (30.2 F)
1960
-3.0 C (26.6 F)
1961
-4.0 C (24.8 F)
1962
-4.0 C (24.8 F)
1963
-2.0 C (28.4 F)
1964
-5.0 C (23.0 F)
1965
-4.0 C (24.8 F)
1966
-5.0 C (23.0 F)
1967
-7.0 C (19.4 F)
1968
-2.0 C (28.4 F)
1969
-4.0 C (24.8 F)
1970
-3.2 C (26.2 F)
1971
-4.6 C (23.7 F)
1972
-2.7 C (27.1 F)
1973
-4.0 C (24.8 F)
1974
-5.0 C (23.0 F)
1975
-3.7 C (25.3 F)
1976
-6.3 C (20.7 F)
1977
-1.0 C (30.2 F)
1978
-3.9 C (25.0 F)
1979
-5.4 C (22.3 F)
1980
-4.0 C (24.8 F)
1981
-4.2 C (24.4 F)
1982
-1.0 C (30.2 F)
1983
-3.4 C (25.9 F)
1984
-4.0 C (24.8 F)
1985
-4.0 C (24.8 F)
1986
-2.0 C (28.4 F)
1987
-6.0 C (21.2 F)
1988
-6.0 C (21.2 F)
1989
-7.0 C (19.4 F)
1990
-5.0 C (23.0 F)
1991
-5.0 C (23.0 F)
1992
-4.0 C (24.8 F)
1993
-8.0 C (17.6 F)
1994
-3.0 C (26.6 F)
1995
-5.0 C (23.0 F)
1996
-5.0 C (23.0 F)
1997
-1.3 C (29.7 F)
1998
n/a
1999
15.2 C (59.4 F)
2000
14.0 C (57.2 F)
2001
-3.8 C (25.2 F)
2002
-4.7 C (23.5 F)
2003
-3.3 C (26.1 F)
2004
-3.2 C (26.2 F)
2005
-1.0 C (30.2 F)
2006
-4.3 C (24.3 F)
2007
-7.6 C (18.3 F)
2009
5.8 C (42.4 F)
2010
-4.4 C (24.1 F)
2011
-4.8 C (23.4 F)
2012
-5.9 C (21.4 F)
2013
-4.9 C (23.2 F)
2014
-2.4 C (27.7 F)
2015
-8.2 C (17.2 F)
2016
-3.3 C (26.1 F)
2017
-2.9 C (26.8 F)
2018
-3.1 C (26.4 F)
2019
-4.6 C (23.7 F)
2020
-5.0 C (23.0 F)
2021
-3.3 C (26.1 F)
2022
-4.3 C (24.3 F)
2023
10.3 C (50.5 F)
2024
-6.4 C (20.5 F)
2025
-5.8 C (21.6 F)
Wettest day (Rx1day)
The wettest day of the year at Mercedes, 1931 to 2025. The record is 180.1 mm (7.1 in) in 2002, marked on the chart; the median year is 82.0 mm (3.2 in).
Wettest day (Rx1day) at Mercedes by year
Year
Wettest day (Rx1day)
1931
119.0 mm (4.7 in)
1932
63.0 mm (2.5 in)
1933
92.0 mm (3.6 in)
1934
91.0 mm (3.6 in)
1935
66.0 mm (2.6 in)
1936
49.0 mm (1.9 in)
1937
105.0 mm (4.1 in)
1938
112.0 mm (4.4 in)
1939
63.0 mm (2.5 in)
1940
83.0 mm (3.3 in)
1941
82.0 mm (3.2 in)
1942
90.0 mm (3.5 in)
1943
45.0 mm (1.8 in)
1944
108.0 mm (4.3 in)
1945
42.0 mm (1.7 in)
1946
55.0 mm (2.2 in)
1947
65.0 mm (2.6 in)
1948
77.0 mm (3.0 in)
1949
73.0 mm (2.9 in)
1950
82.0 mm (3.2 in)
1951
66.0 mm (2.6 in)
1952
59.0 mm (2.3 in)
1953
92.0 mm (3.6 in)
1954
78.0 mm (3.1 in)
1955
73.0 mm (2.9 in)
1956
95.0 mm (3.7 in)
1957
86.0 mm (3.4 in)
1958
171.0 mm (6.7 in)
1959
62.0 mm (2.4 in)
1960
43.0 mm (1.7 in)
1961
107.0 mm (4.2 in)
1962
71.0 mm (2.8 in)
1963
132.0 mm (5.2 in)
1964
163.0 mm (6.4 in)
1965
88.0 mm (3.5 in)
1966
146.0 mm (5.7 in)
1967
89.0 mm (3.5 in)
1968
128.0 mm (5.0 in)
1969
56.0 mm (2.2 in)
1970
158.0 mm (6.2 in)
1971
85.0 mm (3.3 in)
1972
120.0 mm (4.7 in)
1973
98.0 mm (3.9 in)
1974
115.0 mm (4.5 in)
1975
134.0 mm (5.3 in)
1976
117.0 mm (4.6 in)
1977
94.0 mm (3.7 in)
1978
120.0 mm (4.7 in)
1979
68.0 mm (2.7 in)
1980
93.0 mm (3.7 in)
1981
79.0 mm (3.1 in)
1982
68.0 mm (2.7 in)
1983
71.0 mm (2.8 in)
1984
96.0 mm (3.8 in)
1985
60.0 mm (2.4 in)
1986
60.0 mm (2.4 in)
1987
95.0 mm (3.7 in)
1988
74.0 mm (2.9 in)
1989
72.0 mm (2.8 in)
1990
82.0 mm (3.2 in)
1991
91.0 mm (3.6 in)
1992
104.0 mm (4.1 in)
1993
149.0 mm (5.9 in)
1994
62.0 mm (2.4 in)
1995
49.0 mm (1.9 in)
1996
61.0 mm (2.4 in)
1997
46.0 mm (1.8 in)
1998
34.0 mm (1.3 in)
1999
n/a
2000
4.1 mm (0.16 in)
2001
73.9 mm (2.9 in)
2002
180.1 mm (7.1 in)
2003
82.0 mm (3.2 in)
2004
125.0 mm (4.9 in)
2005
61.0 mm (2.4 in)
2006
160.0 mm (6.3 in)
2007
131.1 mm (5.2 in)
2009
0.0 mm (0.00 in)
2010
146.1 mm (5.8 in)
2011
80.0 mm (3.1 in)
2012
93.0 mm (3.7 in)
2013
82.0 mm (3.2 in)
2014
102.1 mm (4.0 in)
2015
91.9 mm (3.6 in)
2016
93.2 mm (3.7 in)
2017
126.0 mm (5.0 in)
2018
90.7 mm (3.6 in)
2019
65.5 mm (2.6 in)
2020
54.9 mm (2.2 in)
2021
74.9 mm (2.9 in)
2022
76.7 mm (3.0 in)
2023
68.6 mm (2.7 in)
2024
119.9 mm (4.7 in)
2025
71.4 mm (2.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mercedes, 1931 to 2025. The record is 293.0 mm (11.5 in) in 1978, marked on the chart; the median year is 128.3 mm (5.0 in).
Wettest five days (Rx5day) at Mercedes by year
Year
Wettest five days (Rx5day)
1931
200.0 mm (7.9 in)
1932
75.0 mm (3.0 in)
1933
92.0 mm (3.6 in)
1934
137.2 mm (5.4 in)
1935
116.0 mm (4.6 in)
1936
141.5 mm (5.6 in)
1937
155.0 mm (6.1 in)
1938
137.0 mm (5.4 in)
1939
92.0 mm (3.6 in)
1940
160.0 mm (6.3 in)
1941
107.0 mm (4.2 in)
1942
171.0 mm (6.7 in)
1943
68.0 mm (2.7 in)
1944
156.0 mm (6.1 in)
1945
67.0 mm (2.6 in)
1946
92.0 mm (3.6 in)
1947
65.0 mm (2.6 in)
1948
116.0 mm (4.6 in)
1949
114.0 mm (4.5 in)
1950
171.0 mm (6.7 in)
1951
91.0 mm (3.6 in)
1952
91.3 mm (3.6 in)
1953
112.4 mm (4.4 in)
1954
102.4 mm (4.0 in)
1955
129.5 mm (5.1 in)
1956
163.0 mm (6.4 in)
1957
126.0 mm (5.0 in)
1958
207.0 mm (8.1 in)
1959
155.0 mm (6.1 in)
1960
81.0 mm (3.2 in)
1961
149.0 mm (5.9 in)
1962
130.5 mm (5.1 in)
1963
153.0 mm (6.0 in)
1964
225.5 mm (8.9 in)
1965
134.0 mm (5.3 in)
1966
258.0 mm (10.2 in)
1967
173.0 mm (6.8 in)
1968
209.0 mm (8.2 in)
1969
56.0 mm (2.2 in)
1970
184.0 mm (7.2 in)
1971
85.0 mm (3.3 in)
1972
143.8 mm (5.7 in)
1973
237.5 mm (9.4 in)
1974
263.0 mm (10.4 in)
1975
195.5 mm (7.7 in)
1976
121.0 mm (4.8 in)
1977
201.0 mm (7.9 in)
1978
293.0 mm (11.5 in)
1979
96.0 mm (3.8 in)
1980
124.5 mm (4.9 in)
1981
122.6 mm (4.8 in)
1982
106.0 mm (4.2 in)
1983
160.0 mm (6.3 in)
1984
209.0 mm (8.2 in)
1985
67.5 mm (2.7 in)
1986
115.0 mm (4.5 in)
1987
130.0 mm (5.1 in)
1988
86.3 mm (3.4 in)
1989
96.0 mm (3.8 in)
1990
100.2 mm (3.9 in)
1991
117.0 mm (4.6 in)
1992
126.1 mm (5.0 in)
1993
179.0 mm (7.0 in)
1994
126.0 mm (5.0 in)
1995
99.0 mm (3.9 in)
1996
96.9 mm (3.8 in)
1997
71.2 mm (2.8 in)
1998
n/a
1999
n/a
2000
n/a
2001
126.5 mm (5.0 in)
2002
194.1 mm (7.6 in)
2003
143.0 mm (5.6 in)
2004
127.0 mm (5.0 in)
2005
122.9 mm (4.8 in)
2006
100.0 mm (3.9 in)
2007
46.0 mm (1.8 in)
2009
n/a
2010
166.9 mm (6.6 in)
2011
83.1 mm (3.3 in)
2012
130.1 mm (5.1 in)
2013
113.0 mm (4.4 in)
2014
188.7 mm (7.4 in)
2015
134.1 mm (5.3 in)
2016
95.2 mm (3.7 in)
2017
173.2 mm (6.8 in)
2018
186.7 mm (7.4 in)
2019
147.0 mm (5.8 in)
2020
98.4 mm (3.9 in)
2021
130.2 mm (5.1 in)
2022
157.2 mm (6.2 in)
2023
133.7 mm (5.3 in)
2024
238.0 mm (9.4 in)
2025
88.3 mm (3.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mercedes, 1931 to 2025. The record is 172 days in 1995, marked on the chart; the median year is 25 days.
Longest dry spell (CDD) at Mercedes by year
Year
Longest dry spell (CDD)
1931
30 days
1932
24 days
1933
28 days
1934
41 days
1935
73 days
1936
28 days
1937
32 days
1938
26 days
1939
22 days
1940
23 days
1941
46 days
1942
54 days
1943
61 days
1944
40 days
1945
35 days
1946
29 days
1947
34 days
1948
62 days
1949
41 days
1950
25 days
1951
35 days
1952
40 days
1953
17 days
1954
19 days
1955
28 days
1956
37 days
1957
30 days
1958
33 days
1959
26 days
1960
41 days
1961
32 days
1962
41 days
1963
17 days
1964
40 days
1965
28 days
1966
24 days
1967
38 days
1968
45 days
1969
21 days
1970
26 days
1971
31 days
1972
29 days
1973
29 days
1974
29 days
1975
25 days
1976
18 days
1977
23 days
1978
26 days
1979
28 days
1980
20 days
1981
26 days
1982
16 days
1983
17 days
1984
22 days
1985
19 days
1986
23 days
1987
27 days
1988
21 days
1989
34 days
1990
30 days
1991
66 days
1992
23 days
1993
27 days
1994
17 days
1995
172 days
1996
17 days
1997
2 days
1998
1 day
1999
n/a
2000
1 day
2001
4 days
2002
6 days
2003
13 days
2004
12 days
2005
12 days
2006
3 days
2007
2 days
2009
1 day
2010
4 days
2011
5 days
2012
3 days
2013
3 days
2014
3 days
2015
10 days
2016
32 days
2017
20 days
2018
19 days
2019
16 days
2020
29 days
2021
23 days
2022
16 days
2023
3 days
2024
5 days
2025
6 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
44 years with a frost
Across 44 years with a frost, the median last spring frost at Mercedes falls on 7 September and the median first autumn frost on 5 June, which leaves a median of 272 days between them.
Fitted over all years, the growing season changes by -5.5 days per decade at this station.
Frost dates and growing season at Mercedes
Measure
Median, all years
Earliest period
Recent period (1956 to 1995)
Recent against earliest
Fitted trend
Last spring frost
7 September
n/a
8 September
n/a
+2.5 days per decade
First autumn frost
5 June
n/a
3 June
n/a
-3.0 days per decade
Growing days
272 days
n/a
267 days
n/a
-5.5 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
68 years, 1931 to 2021
A day with at least 83.2 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 183.2 mm (7.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Mercedes: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
83.2 mm (3.3 in)
5 years
110.0 mm (4.3 in)
10 years
127.7 mm (5.0 in)
25 years
150.1 mm (5.9 in)
50 years
166.7 mm (6.6 in)
100 years
183.2 mm (7.2 in)
Longer than the 68 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, 68 years of values from 1931 to 2021.
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: 171.0 mm (6.7 in) in 1958; 163.0 mm (6.4 in) in 1964; 158.0 mm (6.2 in) in 1970.
Download the Data
Data for Mercedes standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mercedes 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.