Record envelope, standing records and threshold days for Altus Dam (USC00340184), Oklahoma, United States, with 76 years of record.
Key Facts for Altus Dam
Altus Dam (USC00340184) is a weather station in Oklahoma, United States at 34.88 latitude and -99.30 longitude, 465 m (1,525 ft) above sea level.
The station reports from 1945 to 2020, 76 years of record.
1,464 records set at Altus Dam still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Altus Dam set a daily record high maximum temperature of 41.7 C (107.1 F) on 1 July 2020.
About the Station
Location: Oklahoma, United States, 34.88 latitude, -99.30 longitude.
Elevation: 465 m (1,525 ft).
Period of record: 1945 to 2020, 76 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 Altus Dam. 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 Altus Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
-24.4 C (-11.9 F)
n/a
n/a
Feb
35.0 C (95.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Mar
37.2 C (99.0 F)
-17.2 C (1.0 F)
n/a
n/a
Apr
39.4 C (102.9 F)
-5.6 C (21.9 F)
n/a
n/a
May
43.3 C (109.9 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
45.6 C (114.1 F)
7.8 C (46.0 F)
n/a
n/a
Jul
44.4 C (111.9 F)
12.8 C (55.0 F)
n/a
n/a
Aug
43.9 C (111.0 F)
10.6 C (51.1 F)
n/a
n/a
Sep
43.3 C (109.9 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
40.6 C (105.1 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Altus Dam still stand. 2011 holds the most, with 55.
Standing records at Altus Dam by the year they were set
Year set
Standing records
1945
8
1946
24
1947
32
1948
28
1949
10
1950
24
1951
30
1952
35
1953
43
1954
28
1955
31
1956
22
1957
11
1958
10
1959
14
1960
6
1961
6
1962
10
1963
6
1964
5
1965
1
1966
30
1967
21
1968
5
1969
11
1970
20
1971
23
1972
24
1973
15
1974
16
1975
14
1976
15
1977
13
1978
21
1979
23
1980
22
1981
14
1982
14
1983
27
1984
22
1985
18
1986
15
1987
8
1988
7
1989
31
1990
25
1991
16
1992
19
1993
18
1994
21
1995
15
1996
37
1997
28
1998
24
1999
12
2000
36
2001
25
2002
11
2003
16
2004
12
2005
12
2006
24
2007
16
2008
13
2009
19
2010
5
2011
55
2012
25
2013
34
2014
35
2015
22
2016
13
2017
19
2018
18
2019
18
2020
8
All-Time Record Progression
10 new records
10 all-time records were set at Altus Dam between 7 February 1979 and 24 November 2013. Each dot is a new record.
When Altus Dam set new all-time records
Date
Kind
Detail
1979-02-07
Record daily snowfall
Record daily snowfall 17.8 cm (7.0 in)
1980-06-25
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1982-01-11
Record low maximum temperature
Record low maximum temperature -11.7 C (10.9 F)
1983-10-20
Record daily precipitation
Record daily precipitation 179.1 mm (7.1 in)
1983-12-22
Record low maximum temperature
Record low maximum temperature -12.2 C (10.0 F)
1990-12-23
Record low maximum temperature
Record low maximum temperature -12.8 C (9.0 F)
1994-06-28
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
2009-12-25
Record snow depth
Record snow depth 15.2 cm (6.0 in)
2013-11-24
Record daily snowfall
Record daily snowfall 25.4 cm (10.0 in)
2013-11-24
Record snow depth
Record snow depth 25.4 cm (10.0 in)
Wettest Day of Each Month
Oct: 179.1 mm (7.1 in)
The wettest day on record for each calendar month at Altus Dam. The most was 179.1 mm (7.1 in) on 20 October 1983.
Record daily precipitation for each month at Altus Dam
Month
Record daily precipitation (mm)
Date
Jan
70.9 mm (2.8 in)
17 January 2004
Feb
50.8 mm (2.0 in)
20 February 1997
Mar
72.1 mm (2.8 in)
3 March 1988
Apr
105.9 mm (4.2 in)
23 April 2019
May
135.9 mm (5.4 in)
15 May 1980
Jun
135.9 mm (5.4 in)
6 June 1953
Jul
135.9 mm (5.4 in)
5 July 2010
Aug
97.8 mm (3.9 in)
15 August 2018
Sep
101.6 mm (4.0 in)
13 September 1989
Oct
179.1 mm (7.1 in)
20 October 1983
Nov
80.8 mm (3.2 in)
8 November 2011
Dec
69.9 mm (2.8 in)
27 December 2015
Period of Record Coverage
1945 to 2020
Complete yearUnder 90 percent of days
76 years of record at Altus Dam, 1945 to 2020. 13 years have data for under 90 percent of days and are left out of rankings: 1945, 1957, 1959, 1960, 1961, 1962, 1963, 1964 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 58 complete years at Altus Dam, 1946 to 2019. Blue stripes are years cooler than the station's own mean of 16.7 C (62.0 F); red stripes are warmer. The coolest year was 1993, at 14.8 C (58.6 F), and the warmest was 1954, at 18.5 C (65.3 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Altus Dam as warming stripes, 1946 to 2019
Year
Annual mean temperature
Difference from the station mean
1946
17.6 C
+0.93 C
1947
16.7 C
-0.01 C
1948
16.3 C
-0.43 C
1949
16.2 C
-0.52 C
1950
17.3 C
+0.59 C
1951
17.5 C
+0.83 C
1952
18.0 C
+1.31 C
1953
17.9 C
+1.25 C
1954
18.5 C
+1.82 C
1955
17.4 C
+0.75 C
1956
18.1 C
+1.44 C
1967
17.6 C
+0.87 C
1969
17.2 C
+0.47 C
1970
17.2 C
+0.49 C
1972
15.9 C
-0.81 C
1973
15.6 C
-1.12 C
1974
16.2 C
-0.51 C
1975
15.4 C
-1.31 C
1976
15.4 C
-1.28 C
1977
16.6 C
-0.06 C
1978
15.4 C
-1.27 C
1979
15.0 C
-1.71 C
1980
16.6 C
-0.05 C
1981
16.7 C
-0.01 C
1982
15.7 C
-0.95 C
1984
16.2 C
-0.44 C
1985
15.6 C
-1.04 C
1986
16.7 C
+0.05 C
1988
16.1 C
-0.63 C
1989
15.8 C
-0.87 C
1990
16.8 C
+0.07 C
1991
16.7 C
-0.03 C
1993
14.8 C
-1.91 C
1994
16.5 C
-0.19 C
1995
16.5 C
-0.21 C
1996
16.6 C
-0.10 C
1997
15.5 C
-1.18 C
1998
17.7 C
+0.97 C
1999
17.5 C
+0.81 C
2000
17.3 C
+0.63 C
2001
17.6 C
+0.88 C
2002
16.6 C
-0.08 C
2003
16.8 C
+0.11 C
2004
16.7 C
-0.03 C
2005
16.8 C
+0.07 C
2006
17.7 C
+1.04 C
2008
16.3 C
-0.43 C
2009
16.3 C
-0.39 C
2010
16.8 C
+0.11 C
2011
18.0 C
+1.29 C
2012
18.2 C
+1.49 C
2013
16.2 C
-0.51 C
2014
16.0 C
-0.73 C
2015
16.6 C
-0.05 C
2016
17.5 C
+0.84 C
2017
17.1 C
+0.46 C
2018
16.4 C
-0.30 C
2019
16.1 C
-0.59 C
The fitted trend in annual mean temperature here over 1946 to 2019 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 (-0.3 to 0.1) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Altus Dam
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 (-0.3 to 0.1) per decade
1946 to 2019
58
Not clearly different from zero
Mean daily maximum
-0.09 C (-0.21 to 0.04) per decade
-0.2 F (-0.4 to 0.1) per decade
1946 to 2019
58
Not clearly different from zero
Mean daily minimum
-0.02 C (-0.12 to 0.08) per decade
-0.03 F (-0.21 to 0.14) per decade
1946 to 2019
58
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
1945 to 2020
Yearly extremes at Altus Dam: 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)
76
Coldest night (TNn)
-24.4 C (-11.9 F)
1947
-13.9 C (7.0 F)
76
Wettest day (Rx1day)
179.1 mm (7.1 in)
1983
67.3 mm (2.6 in)
76
Wettest five days (Rx5day)
241.1 mm (9.5 in)
2010
103.7 mm (4.1 in)
76
Longest dry spell (CDD)
87 days
1955
39 days
76
Hottest day (TXx)
The hottest day of the year at Altus Dam, 1945 to 2020. 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 Altus Dam by year
Year
Hottest day (TXx)
1945
41.1 C (106.0 F)
1946
42.8 C (109.0 F)
1947
42.2 C (108.0 F)
1948
41.1 C (106.0 F)
1949
41.1 C (106.0 F)
1950
39.4 C (102.9 F)
1951
42.8 C (109.0 F)
1952
42.8 C (109.0 F)
1953
43.9 C (111.0 F)
1954
43.3 C (109.9 F)
1955
41.1 C (106.0 F)
1956
41.7 C (107.1 F)
1957
42.2 C (108.0 F)
1958
42.8 C (109.0 F)
1959
38.9 C (102.0 F)
1960
40.0 C (104.0 F)
1961
39.4 C (102.9 F)
1962
42.2 C (108.0 F)
1963
41.1 C (106.0 F)
1964
43.3 C (109.9 F)
1965
40.0 C (104.0 F)
1966
41.7 C (107.1 F)
1967
40.6 C (105.1 F)
1968
39.4 C (102.9 F)
1969
41.7 C (107.1 F)
1970
41.7 C (107.1 F)
1971
41.1 C (106.0 F)
1972
41.7 C (107.1 F)
1973
39.4 C (102.9 F)
1974
41.7 C (107.1 F)
1975
37.2 C (99.0 F)
1976
40.6 C (105.1 F)
1977
41.1 C (106.0 F)
1978
41.7 C (107.1 F)
1979
38.9 C (102.0 F)
1980
44.4 C (111.9 F)
1981
42.2 C (108.0 F)
1982
40.6 C (105.1 F)
1983
41.7 C (107.1 F)
1984
41.7 C (107.1 F)
1985
40.0 C (104.0 F)
1986
41.7 C (107.1 F)
1987
38.3 C (100.9 F)
1988
42.8 C (109.0 F)
1989
43.3 C (109.9 F)
1990
41.1 C (106.0 F)
1991
40.0 C (104.0 F)
1992
38.3 C (100.9 F)
1993
40.6 C (105.1 F)
1994
45.6 C (114.1 F)
1995
41.7 C (107.1 F)
1996
43.3 C (109.9 F)
1997
39.4 C (102.9 F)
1998
44.4 C (111.9 F)
1999
42.2 C (108.0 F)
2000
43.3 C (109.9 F)
2001
43.3 C (109.9 F)
2002
40.0 C (104.0 F)
2003
42.2 C (108.0 F)
2004
39.4 C (102.9 F)
2005
38.9 C (102.0 F)
2006
41.7 C (107.1 F)
2007
38.3 C (100.9 F)
2008
40.6 C (105.1 F)
2009
42.8 C (109.0 F)
2010
40.0 C (104.0 F)
2011
44.4 C (111.9 F)
2012
43.9 C (111.0 F)
2013
41.7 C (107.1 F)
2014
40.0 C (104.0 F)
2015
40.0 C (104.0 F)
2016
40.0 C (104.0 F)
2017
39.4 C (102.9 F)
2018
44.4 C (111.9 F)
2019
40.6 C (105.1 F)
2020
41.7 C (107.1 F)
Coldest night (TNn)
The coldest night of the year at Altus Dam, 1945 to 2020. The record is -24.4 C (-11.9 F) in 1947, marked on the chart; the median year is -13.9 C (7.0 F).
Coldest night (TNn) at Altus Dam by year
Year
Coldest night (TNn)
1945
-12.8 C (9.0 F)
1946
-11.7 C (10.9 F)
1947
-24.4 C (-11.9 F)
1948
-16.1 C (3.0 F)
1949
-13.9 C (7.0 F)
1950
-13.9 C (7.0 F)
1951
-18.3 C (-0.9 F)
1952
-7.8 C (18.0 F)
1953
-12.8 C (9.0 F)
1954
-13.3 C (8.1 F)
1955
-11.1 C (12.0 F)
1956
-10.0 C (14.0 F)
1957
-10.6 C (12.9 F)
1958
-15.0 C (5.0 F)
1959
-16.7 C (1.9 F)
1960
-11.7 C (10.9 F)
1961
-11.7 C (10.9 F)
1962
-11.1 C (12.0 F)
1963
-12.2 C (10.0 F)
1964
-12.2 C (10.0 F)
1965
-12.8 C (9.0 F)
1966
-20.0 C (-4.0 F)
1967
-12.8 C (9.0 F)
1968
-15.0 C (5.0 F)
1969
-11.1 C (12.0 F)
1970
-12.8 C (9.0 F)
1971
-6.1 C (21.0 F)
1972
-16.1 C (3.0 F)
1973
-18.3 C (-0.9 F)
1974
-14.4 C (6.1 F)
1975
-12.8 C (9.0 F)
1976
-15.0 C (5.0 F)
1977
-17.2 C (1.0 F)
1978
-17.8 C (0.0 F)
1979
-17.8 C (0.0 F)
1980
-17.2 C (1.0 F)
1981
-17.2 C (1.0 F)
1982
-16.7 C (1.9 F)
1983
-17.8 C (0.0 F)
1984
-18.9 C (-2.0 F)
1985
-16.7 C (1.9 F)
1986
-20.6 C (-5.1 F)
1987
-14.4 C (6.1 F)
1988
-20.6 C (-5.1 F)
1989
-23.3 C (-9.9 F)
1990
-15.6 C (3.9 F)
1991
-13.9 C (7.0 F)
1992
-9.4 C (15.1 F)
1993
-14.4 C (6.1 F)
1994
-17.2 C (1.0 F)
1995
-12.8 C (9.0 F)
1996
-18.9 C (-2.0 F)
1997
-12.2 C (10.0 F)
1998
-13.3 C (8.1 F)
1999
-10.0 C (14.0 F)
2000
-11.7 C (10.9 F)
2001
-11.7 C (10.9 F)
2002
-12.2 C (10.0 F)
2003
-10.6 C (12.9 F)
2004
-13.9 C (7.0 F)
2005
-13.9 C (7.0 F)
2006
-12.8 C (9.0 F)
2007
-12.8 C (9.0 F)
2008
-10.6 C (12.9 F)
2009
-13.9 C (7.0 F)
2010
-13.3 C (8.1 F)
2011
-17.8 C (0.0 F)
2012
-12.2 C (10.0 F)
2013
-15.0 C (5.0 F)
2014
-14.4 C (6.1 F)
2015
-13.9 C (7.0 F)
2016
-14.4 C (6.1 F)
2017
-19.4 C (-2.9 F)
2018
-15.0 C (5.0 F)
2019
-11.1 C (12.0 F)
2020
-9.4 C (15.1 F)
Wettest day (Rx1day)
The wettest day of the year at Altus Dam, 1945 to 2020. The record is 179.1 mm (7.1 in) in 1983, marked on the chart; the median year is 67.3 mm (2.6 in).
Wettest day (Rx1day) at Altus Dam by year
Year
Wettest day (Rx1day)
1945
42.7 mm (1.7 in)
1946
63.5 mm (2.5 in)
1947
105.2 mm (4.1 in)
1948
85.6 mm (3.4 in)
1949
114.8 mm (4.5 in)
1950
41.4 mm (1.6 in)
1951
76.7 mm (3.0 in)
1952
39.4 mm (1.6 in)
1953
135.9 mm (5.4 in)
1954
70.1 mm (2.8 in)
1955
68.6 mm (2.7 in)
1956
87.9 mm (3.5 in)
1957
83.8 mm (3.3 in)
1958
41.9 mm (1.6 in)
1959
84.3 mm (3.3 in)
1960
47.0 mm (1.9 in)
1961
71.6 mm (2.8 in)
1962
50.8 mm (2.0 in)
1963
42.2 mm (1.7 in)
1964
50.8 mm (2.0 in)
1965
76.7 mm (3.0 in)
1966
64.8 mm (2.6 in)
1967
39.6 mm (1.6 in)
1968
66.0 mm (2.6 in)
1969
64.8 mm (2.6 in)
1970
53.3 mm (2.1 in)
1971
61.5 mm (2.4 in)
1972
68.6 mm (2.7 in)
1973
59.7 mm (2.4 in)
1974
50.5 mm (2.0 in)
1975
95.8 mm (3.8 in)
1976
44.7 mm (1.8 in)
1977
66.0 mm (2.6 in)
1978
48.8 mm (1.9 in)
1979
78.5 mm (3.1 in)
1980
135.9 mm (5.4 in)
1981
45.2 mm (1.8 in)
1982
50.3 mm (2.0 in)
1983
179.1 mm (7.1 in)
1984
63.0 mm (2.5 in)
1985
74.7 mm (2.9 in)
1986
94.0 mm (3.7 in)
1987
78.5 mm (3.1 in)
1988
72.1 mm (2.8 in)
1989
101.6 mm (4.0 in)
1990
62.2 mm (2.4 in)
1991
57.2 mm (2.3 in)
1992
62.2 mm (2.4 in)
1993
88.4 mm (3.5 in)
1994
46.5 mm (1.8 in)
1995
94.0 mm (3.7 in)
1996
50.3 mm (2.0 in)
1997
101.1 mm (4.0 in)
1998
68.8 mm (2.7 in)
1999
133.4 mm (5.3 in)
2000
68.6 mm (2.7 in)
2001
68.8 mm (2.7 in)
2002
62.2 mm (2.4 in)
2003
43.2 mm (1.7 in)
2004
70.9 mm (2.8 in)
2005
95.8 mm (3.8 in)
2006
59.2 mm (2.3 in)
2007
54.6 mm (2.1 in)
2008
57.4 mm (2.3 in)
2009
54.1 mm (2.1 in)
2010
135.9 mm (5.4 in)
2011
90.9 mm (3.6 in)
2012
63.0 mm (2.5 in)
2013
40.6 mm (1.6 in)
2014
51.6 mm (2.0 in)
2015
87.1 mm (3.4 in)
2016
79.8 mm (3.1 in)
2017
75.4 mm (3.0 in)
2018
111.5 mm (4.4 in)
2019
105.9 mm (4.2 in)
2020
55.6 mm (2.2 in)
Wettest five days (Rx5day)
The wettest five days of the year at Altus Dam, 1945 to 2020. The record is 241.1 mm (9.5 in) in 2010, marked on the chart; the median year is 103.7 mm (4.1 in).
Wettest five days (Rx5day) at Altus Dam by year
Year
Wettest five days (Rx5day)
1945
45.7 mm (1.8 in)
1946
114.3 mm (4.5 in)
1947
105.2 mm (4.1 in)
1948
87.1 mm (3.4 in)
1949
196.3 mm (7.7 in)
1950
66.8 mm (2.6 in)
1951
167.4 mm (6.6 in)
1952
97.3 mm (3.8 in)
1953
135.9 mm (5.4 in)
1954
92.2 mm (3.6 in)
1955
190.8 mm (7.5 in)
1956
111.2 mm (4.4 in)
1957
113.3 mm (4.5 in)
1958
143.2 mm (5.6 in)
1959
106.4 mm (4.2 in)
1960
87.6 mm (3.4 in)
1961
83.4 mm (3.3 in)
1962
96.5 mm (3.8 in)
1963
101.7 mm (4.0 in)
1964
66.0 mm (2.6 in)
1965
100.9 mm (4.0 in)
1966
116.9 mm (4.6 in)
1967
50.2 mm (2.0 in)
1968
76.2 mm (3.0 in)
1969
146.6 mm (5.8 in)
1970
54.8 mm (2.2 in)
1971
83.1 mm (3.3 in)
1972
86.1 mm (3.4 in)
1973
95.2 mm (3.7 in)
1974
105.4 mm (4.1 in)
1975
126.9 mm (5.0 in)
1976
100.3 mm (3.9 in)
1977
134.6 mm (5.3 in)
1978
93.4 mm (3.7 in)
1979
92.2 mm (3.6 in)
1980
204.2 mm (8.0 in)
1981
95.1 mm (3.7 in)
1982
111.2 mm (4.4 in)
1983
234.7 mm (9.2 in)
1984
64.5 mm (2.5 in)
1985
84.6 mm (3.3 in)
1986
131.4 mm (5.2 in)
1987
147.8 mm (5.8 in)
1988
110.5 mm (4.4 in)
1989
123.1 mm (4.8 in)
1990
73.2 mm (2.9 in)
1991
142.5 mm (5.6 in)
1992
77.7 mm (3.1 in)
1993
115.1 mm (4.5 in)
1994
61.0 mm (2.4 in)
1995
187.0 mm (7.4 in)
1996
116.6 mm (4.6 in)
1997
122.2 mm (4.8 in)
1998
102.1 mm (4.0 in)
1999
217.9 mm (8.6 in)
2000
111.6 mm (4.4 in)
2001
164.5 mm (6.5 in)
2002
79.2 mm (3.1 in)
2003
48.8 mm (1.9 in)
2004
123.3 mm (4.9 in)
2005
119.9 mm (4.7 in)
2006
91.9 mm (3.6 in)
2007
98.0 mm (3.9 in)
2008
81.6 mm (3.2 in)
2009
101.1 mm (4.0 in)
2010
241.1 mm (9.5 in)
2011
90.9 mm (3.6 in)
2012
77.0 mm (3.0 in)
2013
75.9 mm (3.0 in)
2014
107.7 mm (4.2 in)
2015
216.9 mm (8.5 in)
2016
79.8 mm (3.1 in)
2017
109.5 mm (4.3 in)
2018
202.6 mm (8.0 in)
2019
121.7 mm (4.8 in)
2020
86.4 mm (3.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Altus Dam, 1945 to 2020. The record is 87 days in 1955, marked on the chart; the median year is 39 days.
Longest dry spell (CDD) at Altus Dam by year
Year
Longest dry spell (CDD)
1945
50 days
1946
49 days
1947
54 days
1948
44 days
1949
38 days
1950
81 days
1951
36 days
1952
47 days
1953
40 days
1954
42 days
1955
87 days
1956
46 days
1957
28 days
1958
20 days
1959
45 days
1960
17 days
1961
27 days
1962
51 days
1963
31 days
1964
52 days
1965
27 days
1966
40 days
1967
78 days
1968
22 days
1969
44 days
1970
64 days
1971
43 days
1972
40 days
1973
36 days
1974
35 days
1975
31 days
1976
35 days
1977
52 days
1978
45 days
1979
48 days
1980
57 days
1981
28 days
1982
29 days
1983
35 days
1984
39 days
1985
27 days
1986
37 days
1987
38 days
1988
42 days
1989
47 days
1990
25 days
1991
40 days
1992
50 days
1993
22 days
1994
32 days
1995
38 days
1996
77 days
1997
28 days
1998
26 days
1999
35 days
2000
56 days
2001
47 days
2002
29 days
2003
36 days
2004
25 days
2005
66 days
2006
66 days
2007
39 days
2008
35 days
2009
28 days
2010
44 days
2011
33 days
2012
41 days
2013
31 days
2014
61 days
2015
31 days
2016
24 days
2017
41 days
2018
25 days
2019
30 days
2020
26 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
58 years with a frost
Across 58 years with a frost, the median last spring frost at Altus Dam falls on 1 April and the median first autumn frost on 4 November, which leaves a median of 216 days between them.
Fitted over all years, the growing season changes by +0.7 days per decade at this station.
Frost dates and growing season at Altus Dam
Measure
Median, all years
Earliest period
Recent period (1988 to 2019)
Recent against earliest
Fitted trend
Last spring frost
1 April
n/a
27 March
n/a
-0.6 days per decade
First autumn frost
4 November
n/a
4 November
n/a
+0.1 days per decade
Growing days
216 days
n/a
216 days
n/a
+0.7 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
64 years, 1946 to 2019
A day with at least 68.4 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 178.7 mm (7.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Altus Dam: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
68.4 mm (2.7 in)
5 years
93.0 mm (3.7 in)
10 years
111.1 mm (4.4 in)
25 years
136.3 mm (5.4 in)
50 years
156.7 mm (6.2 in)
100 years
178.7 mm (7.0 in)
Longer than the 64 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, 64 years of values from 1946 to 2019.
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: 179.1 mm (7.1 in) in 1983; 135.9 mm (5.4 in) in 1953; 135.9 mm (5.4 in) in 1980.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Altus Dam, at 2012. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2012 ran 0.4 C (0.7 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Altus Dam, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2012
-0.4
-0.7
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.
Climate Twins
2004 to 2019 against 1961 to 1990
Over 2004 to 2019, Altus Dam had a mean temperature of 16.8 C (62.3 F) and 776.3 mm (30.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Duncan (United States, 132 km away), Seymour 3NW (United States, 138 km away) and Wichita Falls Muni AP (United States, 125 km away).
Climate twins of Altus Dam: stations whose 1961 to 1990 climate is closest to its 2004 to 2019 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Altus Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Altus Dam 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.