Record envelope, standing records and threshold days for Waco Dam (USC00419417), Texas, United States, with 62 years of record.
Key Facts for Waco Dam
Waco Dam (USC00419417) is a weather station in Texas, United States at 31.60 latitude and -97.22 longitude, 151 m (495 ft) above sea level.
The station reports from 1965 to 2026, 62 years of record.
1,464 records set at Waco Dam still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Waco Dam set a daily record precipitation of 52.1 mm (2.1 in) on 15 June 2026.
About the Station
Location: Texas, United States, 31.60 latitude, -97.22 longitude.
Elevation: 151 m (495 ft).
Period of record: 1965 to 2026, 62 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 Waco 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 Waco Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.0 C (86.0 F)
-14.4 C (6.1 F)
n/a
n/a
Feb
36.1 C (97.0 F)
-16.7 C (1.9 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-9.4 C (15.1 F)
n/a
n/a
Apr
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
May
37.8 C (100.0 F)
4.4 C (39.9 F)
n/a
n/a
Jun
42.8 C (109.0 F)
5.6 C (42.1 F)
n/a
n/a
Jul
42.8 C (109.0 F)
13.3 C (55.9 F)
n/a
n/a
Aug
42.8 C (109.0 F)
12.8 C (55.0 F)
n/a
n/a
Sep
44.4 C (111.9 F)
3.9 C (39.0 F)
n/a
n/a
Oct
40.0 C (104.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
31.7 C (89.1 F)
-8.3 C (17.1 F)
n/a
n/a
Dec
28.9 C (84.0 F)
-20.0 C (-4.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Waco Dam still stand. 2011 holds the most, with 64.
Standing records at Waco Dam by the year they were set
Year set
Standing records
1965
23
1966
26
1967
23
1968
19
1969
30
1970
28
1971
22
1972
32
1973
23
1974
35
1975
14
1976
31
1977
19
1978
23
1979
31
1980
22
1981
19
1982
37
1983
25
1984
27
1985
30
1986
26
1987
16
1988
8
1989
44
1990
27
1991
28
1992
28
1993
12
1994
10
1995
9
1996
29
1997
39
1998
38
1999
35
2000
35
2001
23
2002
24
2003
22
2004
20
2005
23
2006
31
2007
17
2008
10
2009
22
2010
18
2011
64
2012
14
2013
23
2014
23
2015
8
2016
22
2017
27
2018
21
2019
29
2020
13
2021
9
2022
33
2023
45
All-Time Record Progression
7 new records
7 all-time records were set at Waco Dam between 2 September 2000 and 5 August 2022. Each dot is a new record.
When Waco Dam set new all-time records
Date
Kind
Detail
2000-09-02
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
2000-09-05
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
2005-07-04
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
2011-10-09
Record daily precipitation
Record daily precipitation 139.7 mm (5.5 in)
2012-03-20
Record daily precipitation
Record daily precipitation 155.4 mm (6.1 in)
2015-10-24
Record daily precipitation
Record daily precipitation 236.7 mm (9.3 in)
2022-08-05
Record high minimum temperature
Record high minimum temperature 29.4 C (84.9 F)
Wettest Day of Each Month
Oct: 236.7 mm (9.3 in)
The wettest day on record for each calendar month at Waco Dam. The most was 236.7 mm (9.3 in) on 24 October 2015.
Record daily precipitation for each month at Waco Dam
Month
Record daily precipitation (mm)
Date
Jan
89.7 mm (3.5 in)
9 January 2013
Feb
85.6 mm (3.4 in)
12 February 2020
Mar
155.4 mm (6.1 in)
20 March 2012
Apr
88.4 mm (3.5 in)
11 April 1967
May
115.6 mm (4.6 in)
10 May 1968
Jun
95.3 mm (3.8 in)
24 June 2017
Jul
109.2 mm (4.3 in)
15 July 1973
Aug
82.0 mm (3.2 in)
14 August 1991
Sep
105.2 mm (4.1 in)
2 September 2020
Oct
236.7 mm (9.3 in)
24 October 2015
Nov
71.9 mm (2.8 in)
4 November 1965
Dec
76.2 mm (3.0 in)
31 December 2000
Period of Record Coverage
1965 to 2024
Complete yearUnder 90 percent of days
60 years of record at Waco Dam, 1965 to 2024. 23 years have data for under 90 percent of days and are left out of rankings: 1965, 1975, 1994, 1995, 1996, 1997, 1998, 1999 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Waco Dam, 1966 to 2018. Blue stripes are years cooler than the station's own mean of 18.9 C (66.0 F); red stripes are warmer. The coolest year was 1979, at 17.2 C (63.0 F), and the warmest was 2017, at 20.3 C (68.6 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Waco Dam as warming stripes, 1966 to 2018
Year
Annual mean temperature
Difference from the station mean
1966
18.2 C
-0.71 C
1967
18.9 C
+0.05 C
1968
18.0 C
-0.90 C
1969
18.9 C
-0.01 C
1970
18.4 C
-0.45 C
1971
19.4 C
+0.51 C
1972
18.9 C
+0.04 C
1973
18.6 C
-0.32 C
1974
18.8 C
-0.10 C
1976
17.5 C
-1.42 C
1977
19.3 C
+0.47 C
1978
18.4 C
-0.52 C
1979
17.2 C
-1.64 C
1980
19.0 C
+0.14 C
1981
18.8 C
-0.06 C
1982
18.6 C
-0.23 C
1983
17.7 C
-1.21 C
1984
19.1 C
+0.20 C
1985
18.7 C
-0.18 C
1986
19.5 C
+0.58 C
1987
18.6 C
-0.29 C
1988
18.9 C
-0.01 C
1989
18.1 C
-0.75 C
1990
19.6 C
+0.69 C
1991
18.8 C
-0.11 C
1992
18.9 C
-0.01 C
1993
18.4 C
-0.48 C
2000
19.9 C
+1.05 C
2001
19.2 C
+0.36 C
2002
18.9 C
+0.04 C
2003
19.4 C
+0.56 C
2004
19.9 C
+1.01 C
2006
20.3 C
+1.38 C
2007
19.2 C
+0.29 C
2009
19.1 C
+0.19 C
2014
18.4 C
-0.46 C
2017
20.3 C
+1.46 C
2018
19.7 C
+0.82 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1966 to 2018. In Fahrenheit: 0.4 F (0.2 to 0.7) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Waco Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.4) per decade
0.4 F (0.2 to 0.7) per decade
1966 to 2018
38
Rise
Mean daily maximum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1966 to 2018
38
Rise
Mean daily minimum
0.3 C (0.1 to 0.4) per decade
0.5 F (0.2 to 0.7) per decade
1966 to 2018
38
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
1965 to 2026
Yearly extremes at Waco Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
44.4 C (111.9 F)
2000
39.4 C (102.9 F)
60
Coldest night (TNn)
-20.0 C (-4.0 F)
1989
-8.9 C (16.0 F)
60
Wettest day (Rx1day)
236.7 mm (9.3 in)
2015
68.9 mm (2.7 in)
62
Wettest five days (Rx5day)
307.6 mm (12.1 in)
2015
116.1 mm (4.6 in)
62
Longest dry spell (CDD)
71 days
2023
30 days
62
Hottest day (TXx)
The hottest day of the year at Waco Dam, 1965 to 2026. The record is 44.4 C (111.9 F) in 2000, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Waco Dam by year
Year
Hottest day (TXx)
1965
38.3 C (100.9 F)
1966
38.9 C (102.0 F)
1967
38.9 C (102.0 F)
1968
36.7 C (98.1 F)
1969
42.2 C (108.0 F)
1970
39.4 C (102.9 F)
1971
39.4 C (102.9 F)
1972
37.8 C (100.0 F)
1973
37.2 C (99.0 F)
1974
40.0 C (104.0 F)
1975
37.2 C (99.0 F)
1976
38.3 C (100.9 F)
1977
40.0 C (104.0 F)
1978
41.1 C (106.0 F)
1979
37.8 C (100.0 F)
1980
42.8 C (109.0 F)
1981
38.3 C (100.9 F)
1982
38.3 C (100.9 F)
1983
38.9 C (102.0 F)
1984
40.0 C (104.0 F)
1985
41.1 C (106.0 F)
1986
40.6 C (105.1 F)
1987
38.3 C (100.9 F)
1988
39.4 C (102.9 F)
1989
37.8 C (100.0 F)
1990
40.6 C (105.1 F)
1991
36.1 C (97.0 F)
1992
37.2 C (99.0 F)
1993
38.3 C (100.9 F)
1994
38.3 C (100.9 F)
1995
38.9 C (102.0 F)
1996
39.4 C (102.9 F)
1997
41.7 C (107.1 F)
1998
42.8 C (109.0 F)
1999
40.0 C (104.0 F)
2000
44.4 C (111.9 F)
2001
40.6 C (105.1 F)
2002
38.9 C (102.0 F)
2003
40.6 C (105.1 F)
2004
38.9 C (102.0 F)
2005
41.7 C (107.1 F)
2006
40.6 C (105.1 F)
2007
40.6 C (105.1 F)
2008
38.3 C (100.9 F)
2009
38.9 C (102.0 F)
2010
41.1 C (106.0 F)
2011
41.7 C (107.1 F)
2012
40.0 C (104.0 F)
2013
38.9 C (102.0 F)
2014
37.8 C (100.0 F)
2015
40.0 C (104.0 F)
2016
40.6 C (105.1 F)
2017
38.3 C (100.9 F)
2018
42.2 C (108.0 F)
2019
37.8 C (100.0 F)
2020
40.6 C (105.1 F)
2021
37.2 C (99.0 F)
2022
41.1 C (106.0 F)
2023
42.8 C (109.0 F)
2024
21.1 C (70.0 F)
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Waco Dam, 1965 to 2026. The record is -20.0 C (-4.0 F) in 1989, marked on the chart; the median year is -8.9 C (16.0 F).
Coldest night (TNn) at Waco Dam by year
Year
Coldest night (TNn)
1965
-6.1 C (21.0 F)
1966
-11.1 C (12.0 F)
1967
-6.7 C (19.9 F)
1968
-9.4 C (15.1 F)
1969
-7.2 C (19.0 F)
1970
-7.8 C (18.0 F)
1971
-8.9 C (16.0 F)
1972
-8.9 C (16.0 F)
1973
-14.4 C (6.1 F)
1974
-7.2 C (19.0 F)
1975
-7.8 C (18.0 F)
1976
-11.1 C (12.0 F)
1977
-11.7 C (10.9 F)
1978
-9.4 C (15.1 F)
1979
-12.2 C (10.0 F)
1980
-9.4 C (15.1 F)
1981
-11.7 C (10.9 F)
1982
-14.4 C (6.1 F)
1983
-14.4 C (6.1 F)
1984
-12.8 C (9.0 F)
1985
-15.6 C (3.9 F)
1986
-5.6 C (21.9 F)
1987
-6.1 C (21.0 F)
1988
-8.3 C (17.1 F)
1989
-20.0 C (-4.0 F)
1990
-12.2 C (10.0 F)
1991
-8.9 C (16.0 F)
1992
-9.4 C (15.1 F)
1993
-5.0 C (23.0 F)
1994
-6.1 C (21.0 F)
1995
-7.2 C (19.0 F)
1996
-11.7 C (10.9 F)
1997
-11.1 C (12.0 F)
1998
-7.8 C (18.0 F)
1999
-11.1 C (12.0 F)
2000
-6.1 C (21.0 F)
2001
-5.0 C (23.0 F)
2002
-7.8 C (18.0 F)
2003
-7.8 C (18.0 F)
2004
-7.2 C (19.0 F)
2005
-4.4 C (24.1 F)
2006
-6.7 C (19.9 F)
2007
-8.9 C (16.0 F)
2008
-5.6 C (21.9 F)
2009
-6.1 C (21.0 F)
2010
-11.7 C (10.9 F)
2011
-10.0 C (14.0 F)
2012
-5.0 C (23.0 F)
2013
-6.1 C (21.0 F)
2014
-8.9 C (16.0 F)
2015
-7.8 C (18.0 F)
2016
-7.8 C (18.0 F)
2017
-10.0 C (14.0 F)
2018
-11.7 C (10.9 F)
2019
-11.1 C (12.0 F)
2020
-7.2 C (19.0 F)
2021
-16.7 C (1.9 F)
2022
-11.7 C (10.9 F)
2023
-3.9 C (25.0 F)
2024
-1.7 C (28.9 F)
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Waco Dam, 1965 to 2026. The record is 236.7 mm (9.3 in) in 2015, marked on the chart; the median year is 68.9 mm (2.7 in).
Wettest day (Rx1day) at Waco Dam by year
Year
Wettest day (Rx1day)
1965
80.8 mm (3.2 in)
1966
61.0 mm (2.4 in)
1967
88.4 mm (3.5 in)
1968
115.6 mm (4.6 in)
1969
65.0 mm (2.6 in)
1970
84.6 mm (3.3 in)
1971
108.2 mm (4.3 in)
1972
102.9 mm (4.1 in)
1973
109.2 mm (4.3 in)
1974
123.2 mm (4.9 in)
1975
114.0 mm (4.5 in)
1976
83.3 mm (3.3 in)
1977
63.0 mm (2.5 in)
1978
55.1 mm (2.2 in)
1979
75.9 mm (3.0 in)
1980
52.1 mm (2.1 in)
1981
65.3 mm (2.6 in)
1982
62.5 mm (2.5 in)
1983
47.2 mm (1.9 in)
1984
65.0 mm (2.6 in)
1985
70.6 mm (2.8 in)
1986
56.4 mm (2.2 in)
1987
69.6 mm (2.7 in)
1988
53.3 mm (2.1 in)
1989
102.9 mm (4.1 in)
1990
82.8 mm (3.3 in)
1991
82.0 mm (3.2 in)
1992
60.2 mm (2.4 in)
1993
55.9 mm (2.2 in)
1994
51.3 mm (2.0 in)
1995
61.0 mm (2.4 in)
1996
46.7 mm (1.8 in)
1997
57.2 mm (2.3 in)
1998
56.4 mm (2.2 in)
1999
52.1 mm (2.1 in)
2000
76.2 mm (3.0 in)
2001
54.9 mm (2.2 in)
2002
68.1 mm (2.7 in)
2003
61.0 mm (2.4 in)
2004
66.0 mm (2.6 in)
2005
43.7 mm (1.7 in)
2006
55.9 mm (2.2 in)
2007
79.2 mm (3.1 in)
2008
66.5 mm (2.6 in)
2009
73.7 mm (2.9 in)
2010
104.9 mm (4.1 in)
2011
139.7 mm (5.5 in)
2012
155.4 mm (6.1 in)
2013
109.0 mm (4.3 in)
2014
85.3 mm (3.4 in)
2015
236.7 mm (9.3 in)
2016
94.5 mm (3.7 in)
2017
95.3 mm (3.8 in)
2018
89.4 mm (3.5 in)
2019
57.7 mm (2.3 in)
2020
105.2 mm (4.1 in)
2021
58.2 mm (2.3 in)
2022
46.5 mm (1.8 in)
2023
48.3 mm (1.9 in)
2024
96.0 mm (3.8 in)
2025
72.9 mm (2.9 in)
2026
52.1 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Waco Dam, 1965 to 2026. The record is 307.6 mm (12.1 in) in 2015, marked on the chart; the median year is 116.1 mm (4.6 in).
Wettest five days (Rx5day) at Waco Dam by year
Year
Wettest five days (Rx5day)
1965
167.4 mm (6.6 in)
1966
154.8 mm (6.1 in)
1967
118.9 mm (4.7 in)
1968
129.8 mm (5.1 in)
1969
108.0 mm (4.3 in)
1970
104.7 mm (4.1 in)
1971
229.1 mm (9.0 in)
1972
116.1 mm (4.6 in)
1973
119.3 mm (4.7 in)
1974
209.3 mm (8.2 in)
1975
174.4 mm (6.9 in)
1976
187.6 mm (7.4 in)
1977
136.9 mm (5.4 in)
1978
57.0 mm (2.2 in)
1979
112.0 mm (4.4 in)
1980
82.0 mm (3.2 in)
1981
115.4 mm (4.5 in)
1982
103.1 mm (4.1 in)
1983
54.9 mm (2.2 in)
1984
94.0 mm (3.7 in)
1985
87.9 mm (3.5 in)
1986
119.4 mm (4.7 in)
1987
113.4 mm (4.5 in)
1988
99.8 mm (3.9 in)
1989
145.3 mm (5.7 in)
1990
116.0 mm (4.6 in)
1991
118.1 mm (4.6 in)
1992
94.2 mm (3.7 in)
1993
60.8 mm (2.4 in)
1994
61.4 mm (2.4 in)
1995
61.5 mm (2.4 in)
1996
115.3 mm (4.5 in)
1997
97.4 mm (3.8 in)
1998
105.9 mm (4.2 in)
1999
71.4 mm (2.8 in)
2000
118.6 mm (4.7 in)
2001
102.4 mm (4.0 in)
2002
122.5 mm (4.8 in)
2003
72.2 mm (2.8 in)
2004
122.2 mm (4.8 in)
2005
76.4 mm (3.0 in)
2006
63.3 mm (2.5 in)
2007
162.4 mm (6.4 in)
2008
74.1 mm (2.9 in)
2009
172.7 mm (6.8 in)
2010
190.2 mm (7.5 in)
2011
139.7 mm (5.5 in)
2012
155.4 mm (6.1 in)
2013
123.2 mm (4.9 in)
2014
130.3 mm (5.1 in)
2015
307.6 mm (12.1 in)
2016
117.6 mm (4.6 in)
2017
104.2 mm (4.1 in)
2018
167.0 mm (6.6 in)
2019
91.8 mm (3.6 in)
2020
265.3 mm (10.4 in)
2021
134.4 mm (5.3 in)
2022
88.2 mm (3.5 in)
2023
90.8 mm (3.6 in)
2024
175.3 mm (6.9 in)
2025
131.8 mm (5.2 in)
2026
67.0 mm (2.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Waco Dam, 1965 to 2026. The record is 71 days in 2023, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Waco Dam by year
Year
Longest dry spell (CDD)
1965
22 days
1966
31 days
1967
27 days
1968
23 days
1969
52 days
1970
31 days
1971
30 days
1972
32 days
1973
32 days
1974
31 days
1975
30 days
1976
37 days
1977
28 days
1978
44 days
1979
25 days
1980
57 days
1981
22 days
1982
58 days
1983
31 days
1984
25 days
1985
23 days
1986
49 days
1987
20 days
1988
34 days
1989
28 days
1990
20 days
1991
28 days
1992
20 days
1993
41 days
1994
18 days
1995
28 days
1996
39 days
1997
22 days
1998
30 days
1999
30 days
2000
30 days
2001
47 days
2002
27 days
2003
27 days
2004
27 days
2005
39 days
2006
33 days
2007
27 days
2008
22 days
2009
37 days
2010
26 days
2011
33 days
2012
60 days
2013
44 days
2014
24 days
2015
52 days
2016
42 days
2017
30 days
2018
29 days
2019
28 days
2020
32 days
2021
38 days
2022
38 days
2023
71 days
2024
25 days
2025
36 days
2026
21 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
38 years with a frost
Across 38 years with a frost, the median last spring frost at Waco Dam falls on 8 March and the median first autumn frost on 19 November, which leaves a median of 253 days between them.
Fitted over all years, the growing season changes by +6.1 days per decade at this station.
Frost dates and growing season at Waco Dam
Measure
Median, all years
Earliest period
Recent period (1974 to 2018)
Recent against earliest
Fitted trend
Last spring frost
8 March
n/a
7 March
n/a
-4.2 days per decade
First autumn frost
19 November
n/a
18 November
n/a
+1.8 days per decade
Growing days
253 days
n/a
252 days
n/a
+6.1 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
53 years, 1966 to 2025
A day with at least 73.2 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 208.2 mm (8.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Waco 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
73.2 mm (2.9 in)
5 years
99.1 mm (3.9 in)
10 years
119.7 mm (4.7 in)
25 years
150.5 mm (5.9 in)
50 years
177.4 mm (7.0 in)
100 years
208.2 mm (8.2 in)
Longer than the 53 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, 53 years of values from 1966 to 2025.
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: 236.7 mm (9.3 in) in 2015; 155.4 mm (6.1 in) in 2012; 139.7 mm (5.5 in) in 2011.
Download the Data
Data for Waco Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Waco 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.