Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Lampazos (Smn). 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 Lampazos (Smn), with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
38.9 C (102.0 F)
-8.3 C (17.1 F)
n/a
n/a
Feb
40.0 C (104.0 F)
-9.4 C (15.1 F)
n/a
n/a
Mar
45.0 C (113.0 F)
-4.4 C (24.1 F)
n/a
n/a
Apr
45.0 C (113.0 F)
2.8 C (37.0 F)
n/a
n/a
May
45.6 C (114.1 F)
7.8 C (46.0 F)
n/a
n/a
Jun
47.2 C (117.0 F)
10.6 C (51.1 F)
n/a
n/a
Jul
45.6 C (114.1 F)
13.9 C (57.0 F)
n/a
n/a
Aug
45.0 C (113.0 F)
11.7 C (53.1 F)
n/a
n/a
Sep
45.0 C (113.0 F)
8.9 C (48.0 F)
n/a
n/a
Oct
40.0 C (104.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
41.7 C (107.1 F)
-3.3 C (26.1 F)
n/a
n/a
Dec
37.8 C (100.0 F)
-8.3 C (17.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lampazos (Smn) still stand. 1948 holds the most, with 67.
Standing records at Lampazos (Smn) by the year they were set
Year set
Standing records
1934
30
1935
22
1936
5
1941
1
1942
21
1943
32
1944
23
1945
45
1946
43
1947
50
1948
67
1949
47
1950
33
1951
28
1952
28
1953
28
1954
32
1955
55
1956
66
1957
26
1958
16
1959
19
1960
24
1961
17
1962
38
1963
16
1964
14
1965
11
1966
19
1967
16
1968
15
1969
18
1970
15
1971
13
1972
13
1973
26
1974
12
1975
13
1976
18
1977
3
1978
12
1979
12
1980
16
1981
11
1982
19
1983
23
1984
23
1985
14
1986
13
1987
17
1988
10
1989
31
1990
12
1991
18
1992
8
1993
11
1994
6
1995
9
1996
21
1997
16
1998
6
1999
8
2000
15
2001
8
2002
6
2003
8
2004
13
2005
19
2006
5
2008
11
2009
25
2010
7
2011
13
All-Time Record Progression
4 new records
4 all-time records were set at Lampazos (Smn) between 7 January 1971 and 4 February 2011. Each dot is a new record.
When Lampazos (Smn) set new all-time records
Date
Kind
Detail
1971-01-07
Record low maximum temperature
Record low maximum temperature 0.6 C (33.1 F)
1971-09-12
Record daily precipitation
Record daily precipitation 265.9 mm (10.5 in)
1985-01-13
Record low maximum temperature
Record low maximum temperature -1.1 C (30.0 F)
2011-02-04
Record low minimum temperature
Record low minimum temperature -9.4 C (15.1 F)
Wettest Day of Each Month
Sep: 265.9 mm (10.5 in)
The wettest day on record for each calendar month at Lampazos (Smn). The most was 265.9 mm (10.5 in) on 12 September 1971.
Record daily precipitation for each month at Lampazos (Smn)
Month
Record daily precipitation (mm)
Date
Jan
64.8 mm (2.6 in)
15 January 2010
Feb
48.8 mm (1.9 in)
11 February 1960
Mar
95.8 mm (3.8 in)
22 March 1967
Apr
84.8 mm (3.3 in)
11 April 2010
May
111.8 mm (4.4 in)
17 May 1972
Jun
131.8 mm (5.2 in)
17 June 1961
Jul
174.8 mm (6.9 in)
20 July 2005
Aug
254.8 mm (10.0 in)
30 August 1955
Sep
265.9 mm (10.5 in)
12 September 1971
Oct
114.8 mm (4.5 in)
2 October 1945
Nov
59.7 mm (2.4 in)
14 November 1960
Dec
32.8 mm (1.3 in)
7 December 2006
Period of Record Coverage
1934 to 2011
Complete yearUnder 90 percent of days
73 years of record at Lampazos (Smn), 1934 to 2011. 8 years have data for under 90 percent of days and are left out of rankings: 1934, 1936, 1941, 1946, 1969, 2006, 2008, 2009.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Lampazos (Smn), 1935 to 2011. Blue stripes are years cooler than the station's own mean of 22.9 C (73.2 F); red stripes are warmer. The coolest year was 1976, at 21.3 C (70.3 F), and the warmest was 1962, at 25.2 C (77.3 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Lampazos (Smn) as warming stripes, 1935 to 2011
Year
Annual mean temperature
Difference from the station mean
1935
22.7 C
-0.18 C
1942
23.1 C
+0.16 C
1943
24.3 C
+1.39 C
1944
23.3 C
+0.38 C
1945
24.7 C
+1.75 C
1947
23.2 C
+0.32 C
1948
23.3 C
+0.41 C
1950
24.0 C
+1.08 C
1951
23.8 C
+0.92 C
1952
23.5 C
+0.61 C
1953
24.8 C
+1.84 C
1954
24.3 C
+1.35 C
1955
25.1 C
+2.15 C
1957
22.9 C
0.00 C
1958
21.5 C
-1.44 C
1959
21.9 C
-1.00 C
1960
22.4 C
-0.51 C
1961
24.1 C
+1.16 C
1962
25.2 C
+2.26 C
1963
23.1 C
+0.14 C
1964
23.0 C
+0.09 C
1965
23.3 C
+0.37 C
1966
22.1 C
-0.84 C
1967
22.6 C
-0.29 C
1968
21.6 C
-1.29 C
1970
22.0 C
-0.96 C
1971
22.9 C
-0.06 C
1972
22.6 C
-0.33 C
1973
21.9 C
-1.06 C
1974
22.6 C
-0.36 C
1975
22.7 C
-0.26 C
1976
21.3 C
-1.66 C
1977
22.9 C
-0.02 C
1978
22.1 C
-0.84 C
1979
21.9 C
-1.01 C
1980
23.0 C
+0.11 C
1981
22.0 C
-0.90 C
1982
22.5 C
-0.44 C
1983
22.3 C
-0.62 C
1984
23.0 C
+0.09 C
1985
22.6 C
-0.27 C
1986
23.7 C
+0.82 C
1987
22.2 C
-0.72 C
1988
22.9 C
-0.01 C
1989
23.2 C
+0.26 C
1990
23.0 C
+0.10 C
1991
23.0 C
+0.13 C
1992
22.6 C
-0.31 C
1993
22.0 C
-0.91 C
1994
22.9 C
-0.03 C
1995
22.9 C
-0.01 C
1996
22.8 C
-0.13 C
1997
22.0 C
-0.91 C
1998
23.6 C
+0.69 C
1999
23.3 C
+0.36 C
2000
22.8 C
-0.14 C
2001
22.6 C
-0.36 C
2003
22.1 C
-0.83 C
2004
22.1 C
-0.84 C
2010
22.6 C
-0.29 C
2011
24.1 C
+1.14 C
The annual mean temperature here has fallen by 0.15 C (0.04 to 0.26) per decade over 1935 to 2011. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lampazos (Smn)
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.15 C (-0.26 to -0.04) per decade
-0.3 F (-0.5 to -0.1) per decade
1935 to 2011
61
Fall
Mean daily maximum
-0.23 C (-0.44 to -0.02) per decade
-0.42 F (-0.80 to -0.04) per decade
1935 to 2011
61
Fall
Mean daily minimum
-0.07 C (-0.18 to 0.03) per decade
-0.1 F (-0.3 to 0.1) per decade
1935 to 2011
61
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
1934 to 2011
Yearly extremes at Lampazos (Smn): the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.2 C (117.0 F)
1942
43.9 C (111.0 F)
73
Coldest night (TNn)
-9.4 C (15.1 F)
2011
-2.2 C (28.0 F)
73
Wettest day (Rx1day)
265.9 mm (10.5 in)
1971
64.8 mm (2.6 in)
73
Wettest five days (Rx5day)
461.5 mm (18.2 in)
1971
94.7 mm (3.7 in)
73
Longest dry spell (CDD)
114 days
1956
56 days
73
Hottest day (TXx)
The hottest day of the year at Lampazos (Smn), 1934 to 2011. The record is 47.2 C (117.0 F) in 1942, marked on the chart; the median year is 43.9 C (111.0 F).
Hottest day (TXx) at Lampazos (Smn) by year
Year
Hottest day (TXx)
1934
40.6 C (105.1 F)
1935
38.9 C (102.0 F)
1936
42.8 C (109.0 F)
1941
38.3 C (100.9 F)
1942
47.2 C (117.0 F)
1943
46.7 C (116.1 F)
1944
45.0 C (113.0 F)
1945
45.0 C (113.0 F)
1946
43.9 C (111.0 F)
1947
43.9 C (111.0 F)
1948
45.0 C (113.0 F)
1949
40.6 C (105.1 F)
1950
41.7 C (107.1 F)
1951
46.7 C (116.1 F)
1952
45.0 C (113.0 F)
1953
45.0 C (113.0 F)
1954
43.3 C (109.9 F)
1955
45.6 C (114.1 F)
1956
43.3 C (109.9 F)
1957
41.7 C (107.1 F)
1958
42.8 C (109.0 F)
1959
40.6 C (105.1 F)
1960
45.0 C (113.0 F)
1961
43.9 C (111.0 F)
1962
42.8 C (109.0 F)
1963
43.9 C (111.0 F)
1964
43.9 C (111.0 F)
1965
44.4 C (111.9 F)
1966
45.0 C (113.0 F)
1967
43.9 C (111.0 F)
1968
40.6 C (105.1 F)
1969
43.9 C (111.0 F)
1970
43.9 C (111.0 F)
1971
41.7 C (107.1 F)
1972
40.6 C (105.1 F)
1973
43.9 C (111.0 F)
1974
45.0 C (113.0 F)
1975
43.9 C (111.0 F)
1976
41.7 C (107.1 F)
1977
43.9 C (111.0 F)
1978
43.9 C (111.0 F)
1979
41.7 C (107.1 F)
1980
46.1 C (115.0 F)
1981
40.6 C (105.1 F)
1982
42.2 C (108.0 F)
1983
43.9 C (111.0 F)
1984
45.0 C (113.0 F)
1985
45.6 C (114.1 F)
1986
43.3 C (109.9 F)
1987
41.7 C (107.1 F)
1988
43.9 C (111.0 F)
1989
45.0 C (113.0 F)
1990
45.0 C (113.0 F)
1991
41.7 C (107.1 F)
1992
45.0 C (113.0 F)
1993
42.8 C (109.0 F)
1994
44.4 C (111.9 F)
1995
45.0 C (113.0 F)
1996
41.7 C (107.1 F)
1997
40.6 C (105.1 F)
1998
43.9 C (111.0 F)
1999
42.8 C (109.0 F)
2000
42.8 C (109.0 F)
2001
41.7 C (107.1 F)
2002
41.7 C (107.1 F)
2003
42.8 C (109.0 F)
2004
41.7 C (107.1 F)
2005
45.0 C (113.0 F)
2006
41.7 C (107.1 F)
2008
43.9 C (111.0 F)
2009
41.7 C (107.1 F)
2010
42.8 C (109.0 F)
2011
42.8 C (109.0 F)
Coldest night (TNn)
The coldest night of the year at Lampazos (Smn), 1934 to 2011. The record is -9.4 C (15.1 F) in 2011, marked on the chart; the median year is -2.2 C (28.0 F).
Coldest night (TNn) at Lampazos (Smn) by year
Year
Coldest night (TNn)
1934
0.0 C (32.0 F)
1935
-6.7 C (19.9 F)
1936
-2.8 C (27.0 F)
1941
5.0 C (41.0 F)
1942
-0.6 C (30.9 F)
1943
-3.3 C (26.1 F)
1944
0.0 C (32.0 F)
1945
0.0 C (32.0 F)
1946
0.6 C (33.1 F)
1947
-4.4 C (24.1 F)
1948
0.0 C (32.0 F)
1949
1.7 C (35.1 F)
1950
2.8 C (37.0 F)
1951
-5.0 C (23.0 F)
1952
1.7 C (35.1 F)
1953
-3.3 C (26.1 F)
1954
2.8 C (37.0 F)
1955
-1.1 C (30.0 F)
1956
-3.3 C (26.1 F)
1957
-3.3 C (26.1 F)
1958
0.0 C (32.0 F)
1959
-2.2 C (28.0 F)
1960
-4.4 C (24.1 F)
1961
0.0 C (32.0 F)
1962
-8.3 C (17.1 F)
1963
-6.1 C (21.0 F)
1964
-2.2 C (28.0 F)
1965
0.0 C (32.0 F)
1966
-3.9 C (25.0 F)
1967
-0.6 C (30.9 F)
1968
-1.1 C (30.0 F)
1969
-2.2 C (28.0 F)
1970
-3.9 C (25.0 F)
1971
-2.2 C (28.0 F)
1972
-1.1 C (30.0 F)
1973
-4.4 C (24.1 F)
1974
-2.2 C (28.0 F)
1975
-5.0 C (23.0 F)
1976
-3.3 C (26.1 F)
1977
-1.1 C (30.0 F)
1978
-3.3 C (26.1 F)
1979
-4.4 C (24.1 F)
1980
-1.7 C (28.9 F)
1981
-2.2 C (28.0 F)
1982
-3.3 C (26.1 F)
1983
-8.3 C (17.1 F)
1984
-3.3 C (26.1 F)
1985
-5.6 C (21.9 F)
1986
0.0 C (32.0 F)
1987
0.0 C (32.0 F)
1988
0.0 C (32.0 F)
1989
-7.2 C (19.0 F)
1990
1.7 C (35.1 F)
1991
1.7 C (35.1 F)
1992
-2.2 C (28.0 F)
1993
-3.3 C (26.1 F)
1994
-2.2 C (28.0 F)
1995
1.7 C (35.1 F)
1996
-8.3 C (17.1 F)
1997
-3.3 C (26.1 F)
1998
-2.2 C (28.0 F)
1999
-3.3 C (26.1 F)
2000
-2.2 C (28.0 F)
2001
-3.3 C (26.1 F)
2002
-4.4 C (24.1 F)
2003
-3.3 C (26.1 F)
2004
-5.0 C (23.0 F)
2005
-1.1 C (30.0 F)
2006
-3.3 C (26.1 F)
2008
-1.1 C (30.0 F)
2009
-1.1 C (30.0 F)
2010
-6.1 C (21.0 F)
2011
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Lampazos (Smn), 1934 to 2011. The record is 265.9 mm (10.5 in) in 1971, marked on the chart; the median year is 64.8 mm (2.6 in).
Wettest day (Rx1day) at Lampazos (Smn) by year
Year
Wettest day (Rx1day)
1934
47.8 mm (1.9 in)
1935
85.3 mm (3.4 in)
1936
45.0 mm (1.8 in)
1941
5.3 mm (0.21 in)
1942
66.3 mm (2.6 in)
1943
39.9 mm (1.6 in)
1944
169.9 mm (6.7 in)
1945
114.8 mm (4.5 in)
1946
64.8 mm (2.6 in)
1947
89.9 mm (3.5 in)
1948
45.0 mm (1.8 in)
1949
54.9 mm (2.2 in)
1950
64.8 mm (2.6 in)
1951
21.8 mm (0.9 in)
1952
51.8 mm (2.0 in)
1953
47.8 mm (1.9 in)
1954
71.9 mm (2.8 in)
1955
254.8 mm (10.0 in)
1956
37.8 mm (1.5 in)
1957
62.5 mm (2.5 in)
1958
79.8 mm (3.1 in)
1959
56.9 mm (2.2 in)
1960
59.7 mm (2.4 in)
1961
131.8 mm (5.2 in)
1962
47.5 mm (1.9 in)
1963
70.9 mm (2.8 in)
1964
99.8 mm (3.9 in)
1965
91.9 mm (3.6 in)
1966
110.5 mm (4.4 in)
1967
111.0 mm (4.4 in)
1968
52.8 mm (2.1 in)
1969
34.8 mm (1.4 in)
1970
57.9 mm (2.3 in)
1971
265.9 mm (10.5 in)
1972
111.8 mm (4.4 in)
1973
79.8 mm (3.1 in)
1974
79.8 mm (3.1 in)
1975
77.0 mm (3.0 in)
1976
56.9 mm (2.2 in)
1977
56.9 mm (2.2 in)
1978
87.9 mm (3.5 in)
1979
61.0 mm (2.4 in)
1980
83.8 mm (3.3 in)
1981
103.9 mm (4.1 in)
1982
69.9 mm (2.8 in)
1983
58.4 mm (2.3 in)
1984
42.9 mm (1.7 in)
1985
97.8 mm (3.9 in)
1986
95.0 mm (3.7 in)
1987
48.3 mm (1.9 in)
1988
81.0 mm (3.2 in)
1989
74.9 mm (2.9 in)
1990
31.8 mm (1.3 in)
1991
45.0 mm (1.8 in)
1992
39.9 mm (1.6 in)
1993
29.0 mm (1.1 in)
1994
43.9 mm (1.7 in)
1995
32.3 mm (1.3 in)
1996
84.8 mm (3.3 in)
1997
77.0 mm (3.0 in)
1998
118.9 mm (4.7 in)
1999
71.4 mm (2.8 in)
2000
48.8 mm (1.9 in)
2001
17.8 mm (0.7 in)
2002
111.0 mm (4.4 in)
2003
91.9 mm (3.6 in)
2004
29.5 mm (1.2 in)
2005
174.8 mm (6.9 in)
2006
32.8 mm (1.3 in)
2008
19.8 mm (0.8 in)
2009
27.9 mm (1.1 in)
2010
151.9 mm (6.0 in)
2011
39.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lampazos (Smn), 1934 to 2011. The record is 461.5 mm (18.2 in) in 1971, marked on the chart; the median year is 94.7 mm (3.7 in).
Wettest five days (Rx5day) at Lampazos (Smn) by year
Year
Wettest five days (Rx5day)
1934
47.8 mm (1.9 in)
1935
101.1 mm (4.0 in)
1936
79.6 mm (3.1 in)
1941
14.2 mm (0.6 in)
1942
66.3 mm (2.6 in)
1943
67.8 mm (2.7 in)
1944
244.6 mm (9.6 in)
1945
215.7 mm (8.5 in)
1946
85.6 mm (3.4 in)
1947
230.2 mm (9.1 in)
1948
86.7 mm (3.4 in)
1949
94.8 mm (3.7 in)
1950
84.6 mm (3.3 in)
1951
57.4 mm (2.3 in)
1952
71.9 mm (2.8 in)
1953
106.2 mm (4.2 in)
1954
116.9 mm (4.6 in)
1955
275.4 mm (10.8 in)
1956
63.0 mm (2.5 in)
1957
112.3 mm (4.4 in)
1958
151.2 mm (6.0 in)
1959
75.5 mm (3.0 in)
1960
72.3 mm (2.8 in)
1961
131.8 mm (5.2 in)
1962
47.5 mm (1.9 in)
1963
90.2 mm (3.6 in)
1964
172.6 mm (6.8 in)
1965
142.5 mm (5.6 in)
1966
156.4 mm (6.2 in)
1967
219.5 mm (8.6 in)
1968
53.6 mm (2.1 in)
1969
72.4 mm (2.9 in)
1970
90.7 mm (3.6 in)
1971
461.5 mm (18.2 in)
1972
145.3 mm (5.7 in)
1973
126.1 mm (5.0 in)
1974
135.4 mm (5.3 in)
1975
126.3 mm (5.0 in)
1976
183.2 mm (7.2 in)
1977
94.7 mm (3.7 in)
1978
258.4 mm (10.2 in)
1979
125.5 mm (4.9 in)
1980
168.4 mm (6.6 in)
1981
142.3 mm (5.6 in)
1982
69.9 mm (2.8 in)
1983
63.2 mm (2.5 in)
1984
73.2 mm (2.9 in)
1985
105.4 mm (4.1 in)
1986
181.6 mm (7.1 in)
1987
96.0 mm (3.8 in)
1988
118.3 mm (4.7 in)
1989
94.7 mm (3.7 in)
1990
50.5 mm (2.0 in)
1991
87.4 mm (3.4 in)
1992
54.9 mm (2.2 in)
1993
43.5 mm (1.7 in)
1994
47.7 mm (1.9 in)
1995
33.1 mm (1.3 in)
1996
138.6 mm (5.5 in)
1997
81.3 mm (3.2 in)
1998
141.8 mm (5.6 in)
1999
120.9 mm (4.8 in)
2000
89.4 mm (3.5 in)
2001
19.6 mm (0.8 in)
2002
197.9 mm (7.8 in)
2003
116.6 mm (4.6 in)
2004
37.1 mm (1.5 in)
2005
247.4 mm (9.7 in)
2006
41.7 mm (1.6 in)
2008
33.7 mm (1.3 in)
2009
43.4 mm (1.7 in)
2010
280.5 mm (11.0 in)
2011
49.8 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lampazos (Smn), 1934 to 2011. The record is 114 days in 1956, marked on the chart; the median year is 56 days.
Longest dry spell (CDD) at Lampazos (Smn) by year
Year
Longest dry spell (CDD)
1934
61 days
1935
45 days
1936
31 days
1941
30 days
1942
51 days
1943
71 days
1944
57 days
1945
84 days
1946
73 days
1947
62 days
1948
67 days
1949
96 days
1950
32 days
1951
69 days
1952
55 days
1953
70 days
1954
69 days
1955
64 days
1956
114 days
1957
59 days
1958
48 days
1959
44 days
1960
57 days
1961
58 days
1962
71 days
1963
59 days
1964
45 days
1965
54 days
1966
31 days
1967
31 days
1968
50 days
1969
48 days
1970
55 days
1971
55 days
1972
54 days
1973
38 days
1974
53 days
1975
48 days
1976
71 days
1977
56 days
1978
50 days
1979
58 days
1980
84 days
1981
63 days
1982
61 days
1983
56 days
1984
53 days
1985
34 days
1986
70 days
1987
35 days
1988
105 days
1989
84 days
1990
56 days
1991
93 days
1992
38 days
1993
59 days
1994
53 days
1995
46 days
1996
52 days
1997
36 days
1998
83 days
1999
85 days
2000
40 days
2001
23 days
2002
78 days
2003
28 days
2004
46 days
2005
61 days
2006
13 days
2008
87 days
2009
92 days
2010
79 days
2011
86 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
29 years with a frost
Across 29 years with a frost, the median last spring frost at Lampazos (Smn) falls on 12 February and the median first autumn frost on 9 December, which leaves a median of 304 days between them.
Fitted over all years, the growing season changes by -6.8 days per decade at this station.
Frost dates and growing season at Lampazos (Smn)
Measure
Median, all years
Earliest period
Recent period (1943 to 2011)
Recent against earliest
Fitted trend
Last spring frost
12 February
n/a
12 February
n/a
+5.8 days per decade
First autumn frost
9 December
n/a
9 December
n/a
-1.0 days per decade
Growing days
304 days
n/a
304 days
n/a
-6.8 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
66 years, 1935 to 2011
A day with at least 67.4 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 253.7 mm (10.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Lampazos (Smn): the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
67.4 mm (2.7 in)
5 years
103.1 mm (4.1 in)
10 years
131.6 mm (5.2 in)
25 years
174.2 mm (6.9 in)
50 years
211.4 mm (8.3 in)
100 years
253.7 mm (10.0 in)
Longer than the 66 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, 66 years of values from 1935 to 2011.
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: 265.9 mm (10.5 in) in 1971; 254.8 mm (10.0 in) in 1955; 174.8 mm (6.9 in) in 2005.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Lampazos (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lampazos (Smn) 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.