Record envelope, standing records and threshold days for Whitney Dam (USC00419715), Texas, United States, with 78 years of record.
Key Facts for Whitney Dam
Whitney Dam (USC00419715) is a weather station in Texas, United States at 31.86 latitude and -97.38 longitude, 175 m (574 ft) above sea level.
The station reports from 1949 to 2026, 78 years of record.
1,464 records set at Whitney Dam still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Whitney Dam set a daily record precipitation of 54.6 mm (2.1 in) on 15 June 2026.
About the Station
Location: Texas, United States, 31.86 latitude, -97.38 longitude.
Elevation: 175 m (574 ft).
Period of record: 1949 to 2026, 78 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 Whitney 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 Whitney Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
32.2 C (90.0 F)
-15.6 C (3.9 F)
n/a
n/a
Feb
36.1 C (97.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Mar
36.1 C (97.0 F)
-11.7 C (10.9 F)
n/a
n/a
Apr
39.4 C (102.9 F)
-10.0 C (14.0 F)
n/a
n/a
May
38.3 C (100.9 F)
1.7 C (35.1 F)
n/a
n/a
Jun
43.3 C (109.9 F)
10.6 C (51.1 F)
n/a
n/a
Jul
43.9 C (111.0 F)
13.9 C (57.0 F)
n/a
n/a
Aug
44.4 C (111.9 F)
11.7 C (53.1 F)
n/a
n/a
Sep
45.0 C (113.0 F)
3.3 C (37.9 F)
n/a
n/a
Oct
38.3 C (100.9 F)
-2.2 C (28.0 F)
n/a
n/a
Nov
33.9 C (93.0 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
32.8 C (91.0 F)
-19.4 C (-2.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Whitney Dam still stand. 1951 holds the most, with 50.
Standing records at Whitney Dam by the year they were set
Year set
Standing records
1949
11
1950
42
1951
50
1952
37
1953
22
1954
35
1955
22
1956
20
1957
23
1958
12
1959
17
1960
16
1961
24
1962
22
1963
24
1964
17
1965
21
1966
21
1967
28
1968
11
1969
15
1970
22
1971
23
1972
17
1973
13
1974
30
1975
13
1976
37
1977
10
1978
14
1979
20
1980
23
1981
10
1982
22
1983
21
1984
30
1985
24
1986
18
1987
14
1988
6
1989
41
1990
17
1991
28
1992
18
1993
12
1994
17
1995
23
1996
28
1997
14
1998
18
1999
12
2000
24
2001
16
2002
17
2003
20
2004
14
2005
21
2006
25
2007
12
2008
12
2009
10
2010
9
2011
46
2012
14
2013
17
2014
27
2015
6
2016
4
2017
5
2018
10
2019
6
2020
10
2021
8
2022
11
2023
35
All-Time Record Progression
5 new records
5 all-time records were set at Whitney Dam between 14 January 1982 and 8 September 2010. Each dot is a new record.
When Whitney Dam set new all-time records
Date
Kind
Detail
1982-01-14
Record snow depth
Record snow depth 30.5 cm (12.0 in)
2000-09-05
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
2005-07-09
Record high minimum temperature
Record high minimum temperature 29.4 C (84.9 F)
2007-03-30
Record daily precipitation
Record daily precipitation 174.5 mm (6.9 in)
2010-09-08
Record daily precipitation
Record daily precipitation 266.7 mm (10.5 in)
Wettest Day of Each Month
Sep: 266.7 mm (10.5 in)
The wettest day on record for each calendar month at Whitney Dam. The most was 266.7 mm (10.5 in) on 8 September 2010.
Record daily precipitation for each month at Whitney Dam
Month
Record daily precipitation (mm)
Date
Jan
100.3 mm (3.9 in)
29 January 2010
Feb
68.6 mm (2.7 in)
13 February 1997
Mar
174.5 mm (6.9 in)
30 March 2007
Apr
162.6 mm (6.4 in)
11 April 2017
May
165.1 mm (6.5 in)
26 May 2007
Jun
146.3 mm (5.8 in)
17 June 2007
Jul
97.8 mm (3.9 in)
15 July 2013
Aug
127.0 mm (5.0 in)
27 August 1974
Sep
266.7 mm (10.5 in)
8 September 2010
Oct
165.1 mm (6.5 in)
24 October 2015
Nov
127.3 mm (5.0 in)
4 November 1964
Dec
130.8 mm (5.1 in)
21 December 1997
Period of Record Coverage
1949 to 2023
Complete yearUnder 90 percent of days
75 years of record at Whitney Dam, 1949 to 2023. 14 years have data for under 90 percent of days and are left out of rankings: 1949, 2006, 2008, 2013, 2014, 2015, 2016, 2017 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Whitney Dam, 1950 to 2012. Blue stripes are years cooler than the station's own mean of 18.6 C (65.5 F); red stripes are warmer. The coolest year was 1979, at 17.2 C (62.9 F), and the warmest was 2012, at 20.4 C (68.7 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Whitney Dam as warming stripes, 1950 to 2012
Year
Annual mean temperature
Difference from the station mean
1950
18.7 C
+0.13 C
1951
19.0 C
+0.39 C
1952
18.9 C
+0.26 C
1953
18.6 C
+0.02 C
1954
20.1 C
+1.44 C
1955
18.8 C
+0.22 C
1956
19.5 C
+0.91 C
1957
18.3 C
-0.34 C
1958
17.9 C
-0.73 C
1959
17.8 C
-0.77 C
1960
18.1 C
-0.49 C
1961
17.9 C
-0.68 C
1962
18.9 C
+0.30 C
1963
19.0 C
+0.42 C
1964
18.6 C
0.00 C
1965
18.9 C
+0.27 C
1966
17.9 C
-0.67 C
1967
18.7 C
+0.07 C
1968
17.7 C
-0.90 C
1969
18.5 C
-0.10 C
1970
18.1 C
-0.47 C
1971
18.9 C
+0.28 C
1972
18.5 C
-0.09 C
1973
18.2 C
-0.46 C
1974
18.5 C
-0.13 C
1976
17.3 C
-1.35 C
1977
19.0 C
+0.34 C
1978
18.0 C
-0.63 C
1979
17.2 C
-1.42 C
1980
18.7 C
+0.10 C
1981
18.6 C
-0.02 C
1982
18.6 C
0.00 C
1983
17.5 C
-1.14 C
1984
18.9 C
+0.26 C
1985
18.4 C
-0.23 C
1986
19.0 C
+0.35 C
1987
18.2 C
-0.39 C
1988
18.4 C
-0.21 C
1989
17.6 C
-1.05 C
1990
18.9 C
+0.30 C
1991
18.3 C
-0.30 C
1992
18.4 C
-0.18 C
1993
18.2 C
-0.43 C
1994
18.9 C
+0.33 C
1995
18.7 C
+0.08 C
1996
18.8 C
+0.22 C
1997
18.3 C
-0.29 C
1998
20.1 C
+1.47 C
1999
20.1 C
+1.47 C
2000
19.6 C
+0.96 C
2002
18.6 C
0.00 C
2003
19.2 C
+0.57 C
2004
19.3 C
+0.73 C
2012
20.4 C
+1.80 C
The fitted trend in annual mean temperature here over 1950 to 2012 is 0.09 C (-0.02 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.17 F (-0.03 to 0.37) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Whitney Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.09 C (-0.02 to 0.21) per decade
0.17 F (-0.03 to 0.37) per decade
1950 to 2012
54
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.2 to 0.4) per decade
1950 to 2012
54
Not clearly different from zero
Mean daily minimum
0.14 C (0.04 to 0.24) per decade
0.2 F (0.1 to 0.4) per decade
1950 to 2012
54
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
1949 to 2026
Yearly extremes at Whitney Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
2000
40.6 C (105.1 F)
75
Coldest night (TNn)
-19.4 C (-2.9 F)
1951
-8.9 C (16.0 F)
75
Wettest day (Rx1day)
266.7 mm (10.5 in)
2010
71.4 mm (2.8 in)
78
Wettest five days (Rx5day)
363.5 mm (14.3 in)
2010
123.2 mm (4.8 in)
78
Longest dry spell (CDD)
87 days
2011
32 days
78
Hottest day (TXx)
The hottest day of the year at Whitney Dam, 1949 to 2026. The record is 45.0 C (113.0 F) in 2000, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Whitney Dam by year
Year
Hottest day (TXx)
1949
33.3 C (91.9 F)
1950
40.0 C (104.0 F)
1951
42.8 C (109.0 F)
1952
42.8 C (109.0 F)
1953
42.2 C (108.0 F)
1954
43.9 C (111.0 F)
1955
40.6 C (105.1 F)
1956
41.1 C (106.0 F)
1957
42.2 C (108.0 F)
1958
39.4 C (102.9 F)
1959
38.9 C (102.0 F)
1960
40.0 C (104.0 F)
1961
37.8 C (100.0 F)
1962
42.2 C (108.0 F)
1963
40.6 C (105.1 F)
1964
41.7 C (107.1 F)
1965
38.9 C (102.0 F)
1966
39.4 C (102.9 F)
1967
40.6 C (105.1 F)
1968
37.8 C (100.0 F)
1969
41.1 C (106.0 F)
1970
39.4 C (102.9 F)
1971
40.6 C (105.1 F)
1972
40.0 C (104.0 F)
1973
39.4 C (102.9 F)
1974
41.1 C (106.0 F)
1975
38.3 C (100.9 F)
1976
39.4 C (102.9 F)
1977
40.6 C (105.1 F)
1978
40.6 C (105.1 F)
1979
38.3 C (100.9 F)
1980
43.3 C (109.9 F)
1981
38.9 C (102.0 F)
1982
39.4 C (102.9 F)
1983
40.0 C (104.0 F)
1984
42.2 C (108.0 F)
1985
41.1 C (106.0 F)
1986
41.1 C (106.0 F)
1987
40.0 C (104.0 F)
1988
40.6 C (105.1 F)
1989
38.3 C (100.9 F)
1990
38.9 C (102.0 F)
1991
37.8 C (100.0 F)
1992
38.3 C (100.9 F)
1993
40.0 C (104.0 F)
1994
40.0 C (104.0 F)
1995
42.2 C (108.0 F)
1996
41.7 C (107.1 F)
1997
39.4 C (102.9 F)
1998
42.8 C (109.0 F)
1999
41.1 C (106.0 F)
2000
45.0 C (113.0 F)
2001
41.1 C (106.0 F)
2002
40.0 C (104.0 F)
2003
43.9 C (111.0 F)
2004
38.9 C (102.0 F)
2005
41.1 C (106.0 F)
2006
42.2 C (108.0 F)
2007
39.4 C (102.9 F)
2008
41.7 C (107.1 F)
2009
40.0 C (104.0 F)
2010
41.7 C (107.1 F)
2011
42.8 C (109.0 F)
2012
41.1 C (106.0 F)
2013
39.4 C (102.9 F)
2014
38.9 C (102.0 F)
2015
41.1 C (106.0 F)
2016
39.4 C (102.9 F)
2017
37.2 C (99.0 F)
2018
42.8 C (109.0 F)
2019
38.9 C (102.0 F)
2020
38.9 C (102.0 F)
2021
38.3 C (100.9 F)
2022
41.7 C (107.1 F)
2023
44.4 C (111.9 F)
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Whitney Dam, 1949 to 2026. The record is -19.4 C (-2.9 F) in 1951, marked on the chart; the median year is -8.9 C (16.0 F).
Coldest night (TNn) at Whitney Dam by year
Year
Coldest night (TNn)
1949
-5.6 C (21.9 F)
1950
-11.7 C (10.9 F)
1951
-19.4 C (-2.9 F)
1952
-8.3 C (17.1 F)
1953
-7.8 C (18.0 F)
1954
-7.8 C (18.0 F)
1955
-8.3 C (17.1 F)
1956
-7.8 C (18.0 F)
1957
-8.3 C (17.1 F)
1958
-8.9 C (16.0 F)
1959
-12.2 C (10.0 F)
1960
-7.8 C (18.0 F)
1961
-10.0 C (14.0 F)
1962
-13.3 C (8.1 F)
1963
-13.9 C (7.0 F)
1964
-15.0 C (5.0 F)
1965
-7.8 C (18.0 F)
1966
-12.2 C (10.0 F)
1967
-7.8 C (18.0 F)
1968
-9.4 C (15.1 F)
1969
-7.8 C (18.0 F)
1970
-9.4 C (15.1 F)
1971
-12.2 C (10.0 F)
1972
-8.9 C (16.0 F)
1973
-12.8 C (9.0 F)
1974
-7.8 C (18.0 F)
1975
-7.8 C (18.0 F)
1976
-10.6 C (12.9 F)
1977
-11.1 C (12.0 F)
1978
-10.0 C (14.0 F)
1979
-12.8 C (9.0 F)
1980
-9.4 C (15.1 F)
1981
-10.6 C (12.9 F)
1982
-15.6 C (3.9 F)
1983
-13.9 C (7.0 F)
1984
-10.6 C (12.9 F)
1985
-13.9 C (7.0 F)
1986
-5.0 C (23.0 F)
1987
-6.7 C (19.9 F)
1988
-8.9 C (16.0 F)
1989
-19.4 C (-2.9 F)
1990
-11.7 C (10.9 F)
1991
-11.7 C (10.9 F)
1992
-8.3 C (17.1 F)
1993
-5.6 C (21.9 F)
1994
-6.7 C (19.9 F)
1995
-6.1 C (21.0 F)
1996
-10.6 C (12.9 F)
1997
-6.7 C (19.9 F)
1998
-6.7 C (19.9 F)
1999
-10.0 C (14.0 F)
2000
-7.8 C (18.0 F)
2001
-5.0 C (23.0 F)
2002
-8.9 C (16.0 F)
2003
-6.1 C (21.0 F)
2004
-8.9 C (16.0 F)
2005
-10.0 C (14.0 F)
2006
-4.4 C (24.1 F)
2007
-10.6 C (12.9 F)
2008
-7.2 C (19.0 F)
2009
-7.2 C (19.0 F)
2010
-12.2 C (10.0 F)
2011
-10.0 C (14.0 F)
2012
-6.7 C (19.9 F)
2013
-10.0 C (14.0 F)
2014
-11.7 C (10.9 F)
2015
-8.3 C (17.1 F)
2016
-7.8 C (18.0 F)
2017
-10.6 C (12.9 F)
2018
-10.0 C (14.0 F)
2019
-6.1 C (21.0 F)
2020
-5.6 C (21.9 F)
2021
-10.0 C (14.0 F)
2022
-11.1 C (12.0 F)
2023
-5.0 C (23.0 F)
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Whitney Dam, 1949 to 2026. The record is 266.7 mm (10.5 in) in 2010, marked on the chart; the median year is 71.4 mm (2.8 in).
Wettest day (Rx1day) at Whitney Dam by year
Year
Wettest day (Rx1day)
1949
21.6 mm (0.9 in)
1950
48.5 mm (1.9 in)
1951
56.4 mm (2.2 in)
1952
121.7 mm (4.8 in)
1953
66.0 mm (2.6 in)
1954
60.2 mm (2.4 in)
1955
50.3 mm (2.0 in)
1956
45.5 mm (1.8 in)
1957
123.4 mm (4.9 in)
1958
95.3 mm (3.8 in)
1959
103.1 mm (4.1 in)
1960
63.5 mm (2.5 in)
1961
105.4 mm (4.1 in)
1962
83.8 mm (3.3 in)
1963
45.5 mm (1.8 in)
1964
127.3 mm (5.0 in)
1965
59.9 mm (2.4 in)
1966
72.6 mm (2.9 in)
1967
94.5 mm (3.7 in)
1968
68.6 mm (2.7 in)
1969
76.2 mm (3.0 in)
1970
71.1 mm (2.8 in)
1971
158.0 mm (6.2 in)
1972
56.9 mm (2.2 in)
1973
84.1 mm (3.3 in)
1974
127.0 mm (5.0 in)
1975
82.0 mm (3.2 in)
1976
96.5 mm (3.8 in)
1977
67.1 mm (2.6 in)
1978
41.9 mm (1.6 in)
1979
68.1 mm (2.7 in)
1980
35.8 mm (1.4 in)
1981
135.1 mm (5.3 in)
1982
39.4 mm (1.6 in)
1983
63.0 mm (2.5 in)
1984
65.3 mm (2.6 in)
1985
108.0 mm (4.3 in)
1986
60.2 mm (2.4 in)
1987
66.0 mm (2.6 in)
1988
101.6 mm (4.0 in)
1989
57.2 mm (2.3 in)
1990
68.8 mm (2.7 in)
1991
128.3 mm (5.1 in)
1992
65.5 mm (2.6 in)
1993
73.9 mm (2.9 in)
1994
81.5 mm (3.2 in)
1995
83.6 mm (3.3 in)
1996
46.7 mm (1.8 in)
1997
130.8 mm (5.1 in)
1998
64.3 mm (2.5 in)
1999
57.9 mm (2.3 in)
2000
143.5 mm (5.6 in)
2001
55.1 mm (2.2 in)
2002
45.0 mm (1.8 in)
2003
60.7 mm (2.4 in)
2004
146.1 mm (5.8 in)
2005
42.7 mm (1.7 in)
2006
69.9 mm (2.8 in)
2007
174.5 mm (6.9 in)
2008
58.4 mm (2.3 in)
2009
115.8 mm (4.6 in)
2010
266.7 mm (10.5 in)
2011
90.9 mm (3.6 in)
2012
91.9 mm (3.6 in)
2013
97.8 mm (3.9 in)
2014
96.3 mm (3.8 in)
2015
165.1 mm (6.5 in)
2016
71.6 mm (2.8 in)
2017
162.6 mm (6.4 in)
2018
114.3 mm (4.5 in)
2019
54.1 mm (2.1 in)
2020
116.1 mm (4.6 in)
2021
86.6 mm (3.4 in)
2022
43.9 mm (1.7 in)
2023
38.4 mm (1.5 in)
2024
52.8 mm (2.1 in)
2025
83.8 mm (3.3 in)
2026
54.6 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Whitney Dam, 1949 to 2026. The record is 363.5 mm (14.3 in) in 2010, marked on the chart; the median year is 123.2 mm (4.8 in).
Wettest five days (Rx5day) at Whitney Dam by year
Year
Wettest five days (Rx5day)
1949
55.9 mm (2.2 in)
1950
86.6 mm (3.4 in)
1951
80.8 mm (3.2 in)
1952
171.5 mm (6.8 in)
1953
121.1 mm (4.8 in)
1954
144.3 mm (5.7 in)
1955
74.2 mm (2.9 in)
1956
107.2 mm (4.2 in)
1957
169.6 mm (6.7 in)
1958
148.2 mm (5.8 in)
1959
121.1 mm (4.8 in)
1960
151.6 mm (6.0 in)
1961
143.8 mm (5.7 in)
1962
137.4 mm (5.4 in)
1963
50.8 mm (2.0 in)
1964
136.7 mm (5.4 in)
1965
136.8 mm (5.4 in)
1966
167.4 mm (6.6 in)
1967
97.0 mm (3.8 in)
1968
130.6 mm (5.1 in)
1969
128.3 mm (5.1 in)
1970
94.2 mm (3.7 in)
1971
210.8 mm (8.3 in)
1972
73.7 mm (2.9 in)
1973
151.1 mm (5.9 in)
1974
230.9 mm (9.1 in)
1975
101.6 mm (4.0 in)
1976
125.2 mm (4.9 in)
1977
152.4 mm (6.0 in)
1978
69.7 mm (2.7 in)
1979
100.3 mm (3.9 in)
1980
64.5 mm (2.5 in)
1981
169.6 mm (6.7 in)
1982
65.5 mm (2.6 in)
1983
68.6 mm (2.7 in)
1984
104.9 mm (4.1 in)
1985
111.6 mm (4.4 in)
1986
105.9 mm (4.2 in)
1987
125.2 mm (4.9 in)
1988
192.8 mm (7.6 in)
1989
104.6 mm (4.1 in)
1990
95.0 mm (3.7 in)
1991
184.1 mm (7.2 in)
1992
92.6 mm (3.6 in)
1993
148.1 mm (5.8 in)
1994
126.2 mm (5.0 in)
1995
145.0 mm (5.7 in)
1996
66.4 mm (2.6 in)
1997
142.2 mm (5.6 in)
1998
117.8 mm (4.6 in)
1999
67.9 mm (2.7 in)
2000
190.0 mm (7.5 in)
2001
95.8 mm (3.8 in)
2002
84.1 mm (3.3 in)
2003
140.7 mm (5.5 in)
2004
197.0 mm (7.8 in)
2005
63.5 mm (2.5 in)
2006
102.2 mm (4.0 in)
2007
241.6 mm (9.5 in)
2008
58.9 mm (2.3 in)
2009
174.5 mm (6.9 in)
2010
363.5 mm (14.3 in)
2011
95.5 mm (3.8 in)
2012
95.5 mm (3.8 in)
2013
196.6 mm (7.7 in)
2014
134.6 mm (5.3 in)
2015
238.5 mm (9.4 in)
2016
165.6 mm (6.5 in)
2017
162.6 mm (6.4 in)
2018
172.2 mm (6.8 in)
2019
60.5 mm (2.4 in)
2020
221.9 mm (8.7 in)
2021
117.6 mm (4.6 in)
2022
57.3 mm (2.3 in)
2023
75.0 mm (3.0 in)
2024
96.3 mm (3.8 in)
2025
134.3 mm (5.3 in)
2026
83.0 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Whitney Dam, 1949 to 2026. The record is 87 days in 2011, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Whitney Dam by year
Year
Longest dry spell (CDD)
1949
21 days
1950
58 days
1951
38 days
1952
47 days
1953
42 days
1954
43 days
1955
49 days
1956
51 days
1957
29 days
1958
27 days
1959
32 days
1960
23 days
1961
24 days
1962
55 days
1963
26 days
1964
44 days
1965
38 days
1966
44 days
1967
32 days
1968
22 days
1969
33 days
1970
48 days
1971
31 days
1972
41 days
1973
37 days
1974
25 days
1975
30 days
1976
34 days
1977
32 days
1978
38 days
1979
25 days
1980
28 days
1981
21 days
1982
21 days
1983
24 days
1984
20 days
1985
48 days
1986
21 days
1987
25 days
1988
29 days
1989
23 days
1990
20 days
1991
30 days
1992
20 days
1993
41 days
1994
36 days
1995
28 days
1996
52 days
1997
33 days
1998
24 days
1999
36 days
2000
75 days
2001
45 days
2002
51 days
2003
24 days
2004
28 days
2005
29 days
2006
39 days
2007
33 days
2008
27 days
2009
22 days
2010
34 days
2011
87 days
2012
40 days
2013
43 days
2014
30 days
2015
51 days
2016
45 days
2017
84 days
2018
27 days
2019
31 days
2020
34 days
2021
24 days
2022
24 days
2023
46 days
2024
18 days
2025
29 days
2026
20 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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Whitney Dam falls on 15 March and the median first autumn frost on 14 November, which leaves a median of 244 days between them.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
Frost dates and growing season at Whitney Dam
Measure
Median, all years
Earliest period
Recent period (1974 to 2012)
Recent against earliest
Fitted trend
Last spring frost
15 March
n/a
13 March
n/a
-0.1 days per decade
First autumn frost
14 November
n/a
14 November
n/a
+1.0 days per decade
Growing days
244 days
n/a
245 days
n/a
+1.2 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, 1950 to 2021
A day with at least 77.5 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 241.3 mm (9.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Whitney 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
77.5 mm (3.1 in)
5 years
111.3 mm (4.4 in)
10 years
137.2 mm (5.4 in)
25 years
174.6 mm (6.9 in)
50 years
206.3 mm (8.1 in)
100 years
241.3 mm (9.5 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 1950 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: 266.7 mm (10.5 in) in 2010; 174.5 mm (6.9 in) in 2007; 165.1 mm (6.5 in) in 2015.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Whitney Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Whitney 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.