Record envelope, standing records and threshold days for Seguin (USC00418186), Texas, United States, with 51 years of record.
Key Facts for Seguin
Seguin (USC00418186) is a weather station in Texas, United States at 29.58 latitude and -97.95 longitude, 156 m (512 ft) above sea level.
The station reports from 1922 to 1972, 51 years of record.
1,464 records set at Seguin still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Seguin tied a daily record high minimum temperature of 21.1 C (70.0 F) on 19 April 1972.
About the Station
Location: Texas, United States, 29.58 latitude, -97.95 longitude.
Elevation: 156 m (512 ft).
Period of record: 1922 to 1972, 51 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Seguin. 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 Seguin, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.7 C (89.1 F)
-17.8 C (0.0 F)
n/a
n/a
Feb
36.1 C (97.0 F)
-13.9 C (7.0 F)
n/a
n/a
Mar
37.8 C (100.0 F)
-6.7 C (19.9 F)
n/a
n/a
Apr
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
May
40.6 C (105.1 F)
4.4 C (39.9 F)
n/a
n/a
Jun
40.0 C (104.0 F)
11.7 C (53.1 F)
n/a
n/a
Jul
43.3 C (109.9 F)
15.0 C (59.0 F)
n/a
n/a
Aug
41.7 C (107.1 F)
14.4 C (57.9 F)
n/a
n/a
Sep
42.8 C (109.0 F)
5.0 C (41.0 F)
n/a
n/a
Oct
39.4 C (102.9 F)
0.6 C (33.1 F)
n/a
n/a
Nov
35.0 C (95.0 F)
-5.0 C (23.0 F)
n/a
n/a
Dec
32.8 C (91.0 F)
-10.0 C (14.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Seguin still stand. 1927 holds the most, with 81.
Standing records at Seguin by the year they were set
Year set
Standing records
1922
3
1923
45
1924
53
1925
80
1926
47
1927
81
1928
34
1929
42
1930
34
1931
30
1932
37
1933
40
1934
23
1935
18
1936
29
1937
22
1938
54
1939
58
1940
60
1941
23
1942
25
1943
14
1944
18
1945
35
1946
20
1947
24
1948
27
1949
21
1950
27
1951
33
1952
28
1953
19
1954
18
1955
20
1956
22
1957
18
1958
9
1959
19
1960
19
1961
24
1962
26
1963
20
1964
13
1965
20
1966
17
1967
26
1968
14
1969
10
1970
20
1971
36
1972
9
All-Time Record Progression
1 new records
1 all-time records were set at Seguin between 26 July 1954 and 26 July 1954. Each dot is a new record.
When Seguin set new all-time records
Date
Kind
Detail
1954-07-26
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
Wettest Day of Each Month
Jun: 205.0 mm (8.1 in)
The wettest day on record for each calendar month at Seguin. The most was 205.0 mm (8.1 in) on 30 June 1936.
Record daily precipitation for each month at Seguin
Month
Record daily precipitation (mm)
Date
Jan
66.0 mm (2.6 in)
23 January 1938
Feb
73.2 mm (2.9 in)
19 February 1932
Mar
67.1 mm (2.6 in)
28 March 1966
Apr
82.3 mm (3.2 in)
28 April 1932
May
100.1 mm (3.9 in)
25 May 1933
Jun
205.0 mm (8.1 in)
30 June 1936
Jul
138.7 mm (5.5 in)
5 July 1942
Aug
129.3 mm (5.1 in)
29 August 1946
Sep
144.3 mm (5.7 in)
22 September 1957
Oct
147.3 mm (5.8 in)
4 October 1959
Nov
101.6 mm (4.0 in)
13 November 1961
Dec
71.6 mm (2.8 in)
27 December 1934
Period of Record Coverage
1922 to 1972
Complete yearUnder 90 percent of days
51 years of record at Seguin, 1922 to 1972. 5 years have data for under 90 percent of days and are left out of rankings: 1922, 1940, 1941, 1945, 1972.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Seguin, 1923 to 1971. Blue stripes are years cooler than the station's own mean of 20.8 C (69.4 F); red stripes are warmer. The coolest year was 1942, at 19.6 C (67.3 F), and the warmest was 1927, at 22.7 C (72.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Seguin as warming stripes, 1923 to 1971
Year
Annual mean temperature
Difference from the station mean
1923
20.5 C
-0.33 C
1924
20.2 C
-0.59 C
1925
21.9 C
+1.14 C
1926
21.2 C
+0.39 C
1927
22.7 C
+1.92 C
1928
21.1 C
+0.26 C
1929
20.5 C
-0.29 C
1930
20.7 C
-0.09 C
1931
21.3 C
+0.54 C
1932
21.0 C
+0.18 C
1933
22.6 C
+1.80 C
1935
21.9 C
+1.14 C
1936
20.1 C
-0.71 C
1937
20.9 C
+0.08 C
1939
21.8 C
+1.04 C
1942
19.6 C
-1.16 C
1943
19.9 C
-0.87 C
1944
19.8 C
-1.01 C
1946
20.3 C
-0.54 C
1947
19.9 C
-0.94 C
1948
20.2 C
-0.60 C
1949
20.2 C
-0.62 C
1950
20.7 C
-0.09 C
1951
20.4 C
-0.40 C
1952
19.8 C
-1.04 C
1953
20.8 C
+0.03 C
1954
21.7 C
+0.86 C
1955
21.5 C
+0.67 C
1956
21.6 C
+0.80 C
1957
21.1 C
+0.28 C
1958
20.0 C
-0.81 C
1959
20.2 C
-0.61 C
1960
20.1 C
-0.70 C
1961
20.2 C
-0.61 C
1962
21.1 C
+0.30 C
1963
21.1 C
+0.31 C
1964
20.9 C
+0.12 C
1965
20.8 C
+0.00 C
1966
20.4 C
-0.35 C
1967
21.3 C
+0.50 C
1968
20.0 C
-0.81 C
1969
20.6 C
-0.17 C
1970
20.5 C
-0.33 C
1971
22.0 C
+1.22 C
The fitted trend in annual mean temperature here over 1923 to 1971 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.5 to 0.1) 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 Seguin
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.1 C (-0.3 to 0.1) per decade
-0.2 F (-0.5 to 0.1) per decade
1923 to 1971
44
Not clearly different from zero
Mean daily maximum
0.15 C (-0.04 to 0.35) per decade
0.3 F (-0.1 to 0.6) per decade
1923 to 1971
44
Not clearly different from zero
Mean daily minimum
-0.3 C (-0.5 to -0.2) per decade
-0.6 F (-0.9 to -0.3) per decade
1923 to 1971
44
Fall
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
1922 to 1972
Yearly extremes at Seguin: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1954
39.4 C (102.9 F)
51
Coldest night (TNn)
-17.8 C (0.0 F)
1949
-6.1 C (21.0 F)
51
Wettest day (Rx1day)
205.0 mm (8.1 in)
1936
78.2 mm (3.1 in)
51
Wettest five days (Rx5day)
328.7 mm (12.9 in)
1942
104.9 mm (4.1 in)
51
Longest dry spell (CDD)
60 days
1965
35 days
51
Hottest day (TXx)
The hottest day of the year at Seguin, 1922 to 1972. The record is 43.3 C (109.9 F) in 1954, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Seguin by year
Year
Hottest day (TXx)
1922
27.8 C (82.0 F)
1923
39.4 C (102.9 F)
1924
40.6 C (105.1 F)
1925
42.8 C (109.0 F)
1926
41.1 C (106.0 F)
1927
41.1 C (106.0 F)
1928
38.9 C (102.0 F)
1929
38.9 C (102.0 F)
1930
38.3 C (100.9 F)
1931
37.2 C (99.0 F)
1932
40.6 C (105.1 F)
1933
40.0 C (104.0 F)
1934
41.1 C (106.0 F)
1935
38.9 C (102.0 F)
1936
40.0 C (104.0 F)
1937
39.4 C (102.9 F)
1938
39.4 C (102.9 F)
1939
42.8 C (109.0 F)
1940
39.4 C (102.9 F)
1941
40.0 C (104.0 F)
1942
38.3 C (100.9 F)
1943
39.4 C (102.9 F)
1944
39.4 C (102.9 F)
1945
36.7 C (98.1 F)
1946
38.3 C (100.9 F)
1947
39.4 C (102.9 F)
1948
39.4 C (102.9 F)
1949
38.9 C (102.0 F)
1950
38.3 C (100.9 F)
1951
39.4 C (102.9 F)
1952
40.0 C (104.0 F)
1953
40.6 C (105.1 F)
1954
43.3 C (109.9 F)
1955
38.9 C (102.0 F)
1956
40.6 C (105.1 F)
1957
40.0 C (104.0 F)
1958
39.4 C (102.9 F)
1959
37.8 C (100.0 F)
1960
39.4 C (102.9 F)
1961
38.3 C (100.9 F)
1962
41.7 C (107.1 F)
1963
40.6 C (105.1 F)
1964
39.4 C (102.9 F)
1965
37.8 C (100.0 F)
1966
38.9 C (102.0 F)
1967
40.6 C (105.1 F)
1968
37.8 C (100.0 F)
1969
41.1 C (106.0 F)
1970
38.9 C (102.0 F)
1971
39.4 C (102.9 F)
1972
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Seguin, 1922 to 1972. The record is -17.8 C (0.0 F) in 1949, marked on the chart; the median year is -6.1 C (21.0 F).
Coldest night (TNn) at Seguin by year
Year
Coldest night (TNn)
1922
-1.1 C (30.0 F)
1923
-5.6 C (21.9 F)
1924
-7.2 C (19.0 F)
1925
-7.2 C (19.0 F)
1926
-5.6 C (21.9 F)
1927
-4.4 C (24.1 F)
1928
-8.9 C (16.0 F)
1929
-10.0 C (14.0 F)
1930
-12.8 C (9.0 F)
1931
-1.7 C (28.9 F)
1932
-6.7 C (19.9 F)
1933
-12.2 C (10.0 F)
1934
-3.3 C (26.1 F)
1935
-8.9 C (16.0 F)
1936
-8.9 C (16.0 F)
1937
-4.4 C (24.1 F)
1938
-4.4 C (24.1 F)
1939
-4.4 C (24.1 F)
1940
-12.2 C (10.0 F)
1941
-5.0 C (23.0 F)
1942
-6.7 C (19.9 F)
1943
-8.9 C (16.0 F)
1944
-3.9 C (25.0 F)
1945
-5.0 C (23.0 F)
1946
-4.4 C (24.1 F)
1947
-7.8 C (18.0 F)
1948
-6.7 C (19.9 F)
1949
-17.8 C (0.0 F)
1950
-7.8 C (18.0 F)
1951
-13.9 C (7.0 F)
1952
-5.0 C (23.0 F)
1953
-6.1 C (21.0 F)
1954
-5.0 C (23.0 F)
1955
-5.0 C (23.0 F)
1956
-3.3 C (26.1 F)
1957
-6.1 C (21.0 F)
1958
-5.6 C (21.9 F)
1959
-7.8 C (18.0 F)
1960
-6.1 C (21.0 F)
1961
-6.1 C (21.0 F)
1962
-12.2 C (10.0 F)
1963
-10.0 C (14.0 F)
1964
-9.4 C (15.1 F)
1965
-4.4 C (24.1 F)
1966
-8.3 C (17.1 F)
1967
-6.1 C (21.0 F)
1968
-5.0 C (23.0 F)
1969
-6.1 C (21.0 F)
1970
-8.9 C (16.0 F)
1971
-6.1 C (21.0 F)
1972
-7.2 C (19.0 F)
Wettest day (Rx1day)
The wettest day of the year at Seguin, 1922 to 1972. The record is 205.0 mm (8.1 in) in 1936, marked on the chart; the median year is 78.2 mm (3.1 in).
Wettest day (Rx1day) at Seguin by year
Year
Wettest day (Rx1day)
1922
4.6 mm (0.18 in)
1923
67.1 mm (2.6 in)
1924
66.5 mm (2.6 in)
1925
34.3 mm (1.4 in)
1926
61.2 mm (2.4 in)
1927
50.8 mm (2.0 in)
1928
99.8 mm (3.9 in)
1929
89.7 mm (3.5 in)
1930
60.2 mm (2.4 in)
1931
40.1 mm (1.6 in)
1932
82.3 mm (3.2 in)
1933
100.1 mm (3.9 in)
1934
78.7 mm (3.1 in)
1935
96.8 mm (3.8 in)
1936
205.0 mm (8.1 in)
1937
88.9 mm (3.5 in)
1938
66.0 mm (2.6 in)
1939
61.0 mm (2.4 in)
1940
179.3 mm (7.1 in)
1941
58.4 mm (2.3 in)
1942
138.7 mm (5.5 in)
1943
43.2 mm (1.7 in)
1944
47.8 mm (1.9 in)
1945
47.5 mm (1.9 in)
1946
129.3 mm (5.1 in)
1947
50.8 mm (2.0 in)
1948
55.6 mm (2.2 in)
1949
127.0 mm (5.0 in)
1950
83.6 mm (3.3 in)
1951
104.9 mm (4.1 in)
1952
96.0 mm (3.8 in)
1953
59.2 mm (2.3 in)
1954
79.2 mm (3.1 in)
1955
46.2 mm (1.8 in)
1956
76.2 mm (3.0 in)
1957
144.3 mm (5.7 in)
1958
133.4 mm (5.3 in)
1959
147.3 mm (5.8 in)
1960
142.5 mm (5.6 in)
1961
192.0 mm (7.6 in)
1962
86.9 mm (3.4 in)
1963
67.3 mm (2.6 in)
1964
78.2 mm (3.1 in)
1965
110.0 mm (4.3 in)
1966
67.1 mm (2.6 in)
1967
75.2 mm (3.0 in)
1968
84.6 mm (3.3 in)
1969
58.4 mm (2.3 in)
1970
73.7 mm (2.9 in)
1971
104.1 mm (4.1 in)
1972
15.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Seguin, 1922 to 1972. The record is 328.7 mm (12.9 in) in 1942, marked on the chart; the median year is 104.9 mm (4.1 in).
Wettest five days (Rx5day) at Seguin by year
Year
Wettest five days (Rx5day)
1922
4.6 mm (0.18 in)
1923
99.8 mm (3.9 in)
1924
72.3 mm (2.8 in)
1925
37.1 mm (1.5 in)
1926
98.0 mm (3.9 in)
1927
50.8 mm (2.0 in)
1928
101.8 mm (4.0 in)
1929
230.0 mm (9.1 in)
1930
116.9 mm (4.6 in)
1931
63.5 mm (2.5 in)
1932
118.9 mm (4.7 in)
1933
134.6 mm (5.3 in)
1934
125.2 mm (4.9 in)
1935
197.3 mm (7.8 in)
1936
254.0 mm (10.0 in)
1937
142.2 mm (5.6 in)
1938
96.7 mm (3.8 in)
1939
86.6 mm (3.4 in)
1940
203.2 mm (8.0 in)
1941
118.0 mm (4.6 in)
1942
328.7 mm (12.9 in)
1943
74.4 mm (2.9 in)
1944
70.8 mm (2.8 in)
1945
69.9 mm (2.8 in)
1946
163.0 mm (6.4 in)
1947
75.7 mm (3.0 in)
1948
58.1 mm (2.3 in)
1949
214.1 mm (8.4 in)
1950
123.2 mm (4.9 in)
1951
104.9 mm (4.1 in)
1952
177.8 mm (7.0 in)
1953
102.1 mm (4.0 in)
1954
80.2 mm (3.2 in)
1955
93.6 mm (3.7 in)
1956
76.2 mm (3.0 in)
1957
276.9 mm (10.9 in)
1958
158.7 mm (6.2 in)
1959
154.2 mm (6.1 in)
1960
212.4 mm (8.4 in)
1961
224.0 mm (8.8 in)
1962
86.9 mm (3.4 in)
1963
72.2 mm (2.8 in)
1964
105.7 mm (4.2 in)
1965
131.6 mm (5.2 in)
1966
70.4 mm (2.8 in)
1967
207.5 mm (8.2 in)
1968
142.2 mm (5.6 in)
1969
80.0 mm (3.1 in)
1970
94.8 mm (3.7 in)
1971
181.4 mm (7.1 in)
1972
15.2 mm (0.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Seguin, 1922 to 1972. The record is 60 days in 1965, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Seguin by year
Year
Longest dry spell (CDD)
1922
29 days
1923
47 days
1924
34 days
1925
45 days
1926
23 days
1927
39 days
1928
26 days
1929
47 days
1930
19 days
1931
49 days
1932
46 days
1933
50 days
1934
35 days
1935
38 days
1936
38 days
1937
35 days
1938
34 days
1939
31 days
1940
33 days
1941
32 days
1942
23 days
1943
37 days
1944
49 days
1945
21 days
1946
23 days
1947
42 days
1948
31 days
1949
19 days
1950
47 days
1951
35 days
1952
53 days
1953
43 days
1954
38 days
1955
56 days
1956
36 days
1957
22 days
1958
27 days
1959
32 days
1960
21 days
1961
36 days
1962
44 days
1963
36 days
1964
28 days
1965
60 days
1966
51 days
1967
33 days
1968
28 days
1969
22 days
1970
58 days
1971
56 days
1972
31 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
43 years with a frost
Across 43 years with a frost, the median last spring frost at Seguin falls on 8 March and the median first autumn frost on 26 November, which leaves a median of 261 days between them.
Fitted over all years, the growing season changes by -1.5 days per decade at this station.
Frost dates and growing season at Seguin
Measure
Median, all years
Earliest period
Recent period (1937 to 1970)
Recent against earliest
Fitted trend
Last spring frost
8 March
n/a
8 March
n/a
-0.4 days per decade
First autumn frost
26 November
n/a
27 November
n/a
-1.9 days per decade
Growing days
261 days
n/a
258 days
n/a
-1.5 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
49 years, 1923 to 1971
A day with at least 79.1 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 239.1 mm (9.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Seguin: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
79.1 mm (3.1 in)
5 years
113.8 mm (4.5 in)
10 years
139.7 mm (5.5 in)
25 years
176.3 mm (6.9 in)
50 years
206.4 mm (8.1 in)
Longer than the 49 years of record
100 years
239.1 mm (9.4 in)
Longer than the 49 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, 49 years of values from 1923 to 1971.
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: 205.0 mm (8.1 in) in 1936; 192.0 mm (7.6 in) in 1961; 179.3 mm (7.1 in) in 1940.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Seguin, at 1942 and 1955. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1942 ran 0.7 C (1.2 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1955 ran 0.8 C (1.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Seguin, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1942
-0.7
-1.2
likely
5
1955
+0.8
+1.5
possible
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.
Download the Data
Data for Seguin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Seguin 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.