Record envelope, standing records and threshold days for Lavon Dam (USC00415094), Texas, United States, with 78 years of record.
Key Facts for Lavon Dam
Lavon Dam (USC00415094) is a weather station in Texas, United States at 33.04 latitude and -96.49 longitude, 155 m (510 ft) above sea level.
The station reports from 1949 to 2026, 78 years of record.
1,464 records set at Lavon Dam still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lavon Dam set a daily record precipitation of 61.2 mm (2.4 in) on 15 February 2026.
About the Station
Location: Texas, United States, 33.04 latitude, -96.49 longitude.
Elevation: 155 m (510 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 Lavon 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 Lavon Dam, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
28.9 C (84.0 F)
-16.1 C (3.0 F)
n/a
n/a
Feb
35.6 C (96.1 F)
-13.9 C (7.0 F)
n/a
n/a
Mar
35.0 C (95.0 F)
-11.1 C (12.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-2.2 C (28.0 F)
n/a
n/a
May
37.2 C (99.0 F)
2.8 C (37.0 F)
n/a
n/a
Jun
43.9 C (111.0 F)
9.4 C (48.9 F)
n/a
n/a
Jul
42.8 C (109.0 F)
14.4 C (57.9 F)
n/a
n/a
Aug
42.2 C (108.0 F)
8.9 C (48.0 F)
n/a
n/a
Sep
43.9 C (111.0 F)
2.2 C (36.0 F)
n/a
n/a
Oct
37.8 C (100.0 F)
-3.3 C (26.1 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
30.6 C (87.1 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 Lavon Dam still stand. 1989 holds the most, with 52.
Standing records at Lavon Dam by the year they were set
Year set
Standing records
1953
21
1954
36
1955
49
1956
36
1957
29
1958
18
1959
32
1960
25
1961
20
1962
26
1963
26
1964
24
1965
23
1966
25
1967
26
1968
11
1969
19
1970
30
1971
21
1972
24
1973
12
1974
27
1975
14
1976
35
1977
12
1978
21
1979
13
1980
36
1981
12
1982
19
1983
31
1984
17
1985
30
1986
15
1987
12
1988
9
1989
52
1990
14
1991
23
1992
18
1993
14
1994
11
1995
21
1996
33
1997
16
1998
35
1999
11
2000
25
2001
18
2002
17
2003
15
2004
17
2005
25
2006
38
2007
21
2008
22
2009
13
2010
19
2011
43
2012
24
2013
22
2014
20
2015
23
2016
11
2017
5
2018
2
All-Time Record Progression
5 new records
5 all-time records were set at Lavon Dam between 25 December 1983 and 5 June 1998. Each dot is a new record.
When Lavon Dam set new all-time records
Date
Kind
Detail
1983-12-25
Record low maximum temperature
Record low maximum temperature -10.0 C (14.0 F)
1984-09-01
Record high minimum temperature
Record high minimum temperature 28.9 C (84.0 F)
1984-09-02
Record high minimum temperature
Record high minimum temperature 30.6 C (87.1 F)
1989-12-23
Record low minimum temperature
Record low minimum temperature -19.4 C (-2.9 F)
1998-06-05
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
Wettest Day of Each Month
Sep: 199.4 mm (7.9 in)
The wettest day on record for each calendar month at Lavon Dam. The most was 199.4 mm (7.9 in) on 6 September 1967.
Record daily precipitation for each month at Lavon Dam
Month
Record daily precipitation (mm)
Date
Jan
118.6 mm (4.7 in)
30 January 2025
Feb
87.6 mm (3.4 in)
1 February 1983
Mar
121.7 mm (4.8 in)
19 March 2008
Apr
142.2 mm (5.6 in)
5 April 1986
May
154.4 mm (6.1 in)
13 May 1982
Jun
101.6 mm (4.0 in)
4 June 1990
Jul
102.1 mm (4.0 in)
27 July 1950
Aug
85.1 mm (3.4 in)
23 August 1970
Sep
199.4 mm (7.9 in)
6 September 1967
Oct
172.7 mm (6.8 in)
24 October 2015
Nov
101.1 mm (4.0 in)
8 November 2016
Dec
102.4 mm (4.0 in)
4 December 1998
Period of Record Coverage
1953 to 2019
Complete yearUnder 90 percent of days
67 years of record at Lavon Dam, 1953 to 2019. 17 years have data for under 90 percent of days and are left out of rankings: 1953, 1977, 1981, 1997, 1998, 2002, 2004, 2007 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Lavon Dam, 1954 to 2012. Blue stripes are years cooler than the station's own mean of 17.8 C (64.1 F); red stripes are warmer. The coolest year was 1989, at 16.3 C (61.3 F), and the warmest was 2006, at 20.2 C (68.4 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Lavon Dam as warming stripes, 1954 to 2012
Year
Annual mean temperature
Difference from the station mean
1954
19.5 C
+1.68 C
1955
18.6 C
+0.78 C
1956
19.0 C
+1.17 C
1957
17.9 C
+0.07 C
1958
17.4 C
-0.46 C
1959
17.4 C
-0.43 C
1960
17.2 C
-0.65 C
1961
17.1 C
-0.69 C
1962
17.6 C
-0.19 C
1963
18.1 C
+0.29 C
1964
17.8 C
-0.01 C
1965
18.2 C
+0.37 C
1966
17.2 C
-0.65 C
1967
17.8 C
0.00 C
1968
16.9 C
-0.89 C
1969
17.9 C
+0.03 C
1970
17.3 C
-0.50 C
1971
18.2 C
+0.37 C
1973
17.5 C
-0.33 C
1974
17.6 C
-0.22 C
1975
17.4 C
-0.40 C
1976
16.8 C
-1.01 C
1978
17.3 C
-0.54 C
1982
17.6 C
-0.20 C
1983
16.9 C
-0.96 C
1985
17.4 C
-0.45 C
1987
18.2 C
+0.35 C
1989
16.3 C
-1.58 C
1990
18.0 C
+0.14 C
1991
18.3 C
+0.42 C
1992
17.6 C
-0.21 C
1993
17.1 C
-0.72 C
1995
17.9 C
+0.09 C
1996
17.6 C
-0.20 C
2001
18.5 C
+0.69 C
2003
17.6 C
-0.23 C
2005
18.4 C
+0.53 C
2006
20.2 C
+2.41 C
2008
18.6 C
+0.74 C
2009
18.0 C
+0.19 C
2012
19.2 C
+1.36 C
The fitted trend in annual mean temperature here over 1954 to 2012 is 0.1 C (0.0 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lavon Dam
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.0 to 0.2) per decade
0.2 F (-0.1 to 0.4) per decade
1954 to 2012
41
Not clearly different from zero
Mean daily maximum
0.18 C (0.00 to 0.35) per decade
0.32 F (-0.01 to 0.63) per decade
1954 to 2012
41
Not clearly different from zero
Mean daily minimum
0.00 C (-0.14 to 0.15) per decade
0.00 F (-0.26 to 0.26) per decade
1954 to 2012
41
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
1949 to 2026
Yearly extremes at Lavon Dam: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
1998
39.4 C (102.9 F)
67
Coldest night (TNn)
-19.4 C (-2.9 F)
1989
-10.0 C (14.0 F)
67
Wettest day (Rx1day)
199.4 mm (7.9 in)
1967
79.9 mm (3.1 in)
78
Wettest five days (Rx5day)
238.5 mm (9.4 in)
1991
124.4 mm (4.9 in)
78
Longest dry spell (CDD)
64 days
2000
29 days
78
Hottest day (TXx)
The hottest day of the year at Lavon Dam, 1949 to 2026. The record is 43.9 C (111.0 F) in 1998, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Lavon Dam by year
Year
Hottest day (TXx)
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
41.1 C (106.0 F)
1954
42.8 C (109.0 F)
1955
40.0 C (104.0 F)
1956
42.2 C (108.0 F)
1957
40.0 C (104.0 F)
1958
38.9 C (102.0 F)
1959
38.3 C (100.9 F)
1960
38.3 C (100.9 F)
1961
37.8 C (100.0 F)
1962
40.0 C (104.0 F)
1963
39.4 C (102.9 F)
1964
42.2 C (108.0 F)
1965
38.3 C (100.9 F)
1966
37.8 C (100.0 F)
1967
38.9 C (102.0 F)
1968
37.2 C (99.0 F)
1969
40.0 C (104.0 F)
1970
40.6 C (105.1 F)
1971
39.4 C (102.9 F)
1972
38.9 C (102.0 F)
1973
37.2 C (99.0 F)
1974
40.0 C (104.0 F)
1975
39.4 C (102.9 F)
1976
36.7 C (98.1 F)
1977
38.9 C (102.0 F)
1978
41.1 C (106.0 F)
1979
38.3 C (100.9 F)
1980
41.1 C (106.0 F)
1981
37.8 C (100.0 F)
1982
37.8 C (100.0 F)
1983
37.8 C (100.0 F)
1984
41.7 C (107.1 F)
1985
40.6 C (105.1 F)
1986
41.1 C (106.0 F)
1987
38.9 C (102.0 F)
1988
40.0 C (104.0 F)
1989
37.2 C (99.0 F)
1990
40.6 C (105.1 F)
1991
37.2 C (99.0 F)
1992
35.6 C (96.1 F)
1993
38.9 C (102.0 F)
1994
37.2 C (99.0 F)
1995
40.0 C (104.0 F)
1996
41.1 C (106.0 F)
1997
38.9 C (102.0 F)
1998
43.9 C (111.0 F)
1999
40.6 C (105.1 F)
2000
43.9 C (111.0 F)
2001
40.0 C (104.0 F)
2002
38.3 C (100.9 F)
2003
41.1 C (106.0 F)
2004
38.3 C (100.9 F)
2005
40.0 C (104.0 F)
2006
41.7 C (107.1 F)
2007
39.4 C (102.9 F)
2008
41.7 C (107.1 F)
2009
38.9 C (102.0 F)
2010
40.0 C (104.0 F)
2011
41.7 C (107.1 F)
2012
39.4 C (102.9 F)
2013
40.0 C (104.0 F)
2014
36.7 C (98.1 F)
2015
38.3 C (100.9 F)
2016
39.4 C (102.9 F)
2017
36.1 C (97.0 F)
2018
39.4 C (102.9 F)
2019
31.1 C (88.0 F)
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Lavon Dam, 1949 to 2026. The record is -19.4 C (-2.9 F) in 1989, marked on the chart; the median year is -10.0 C (14.0 F).
Coldest night (TNn) at Lavon Dam by year
Year
Coldest night (TNn)
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
-10.0 C (14.0 F)
1954
-10.6 C (12.9 F)
1955
-10.0 C (14.0 F)
1956
-10.0 C (14.0 F)
1957
-10.6 C (12.9 F)
1958
-10.6 C (12.9 F)
1959
-12.8 C (9.0 F)
1960
-8.9 C (16.0 F)
1961
-10.6 C (12.9 F)
1962
-13.9 C (7.0 F)
1963
-15.0 C (5.0 F)
1964
-16.1 C (3.0 F)
1965
-7.8 C (18.0 F)
1966
-12.8 C (9.0 F)
1967
-7.2 C (19.0 F)
1968
-11.1 C (12.0 F)
1969
-8.9 C (16.0 F)
1970
-10.6 C (12.9 F)
1971
-9.4 C (15.1 F)
1972
-11.7 C (10.9 F)
1973
-13.3 C (8.1 F)
1974
-8.3 C (17.1 F)
1975
-8.9 C (16.0 F)
1976
-12.2 C (10.0 F)
1977
-12.2 C (10.0 F)
1978
-12.8 C (9.0 F)
1979
-13.3 C (8.1 F)
1980
-8.9 C (16.0 F)
1981
-11.7 C (10.9 F)
1982
-15.0 C (5.0 F)
1983
-14.4 C (6.1 F)
1984
-11.1 C (12.0 F)
1985
-13.3 C (8.1 F)
1986
-6.1 C (21.0 F)
1987
-5.6 C (21.9 F)
1988
-10.0 C (14.0 F)
1989
-19.4 C (-2.9 F)
1990
-11.7 C (10.9 F)
1991
-10.6 C (12.9 F)
1992
-9.4 C (15.1 F)
1993
-7.2 C (19.0 F)
1994
-7.8 C (18.0 F)
1995
-8.9 C (16.0 F)
1996
-13.9 C (7.0 F)
1997
-10.0 C (14.0 F)
1998
-6.7 C (19.9 F)
1999
-7.2 C (19.0 F)
2000
-8.3 C (17.1 F)
2001
-7.2 C (19.0 F)
2002
-10.6 C (12.9 F)
2003
-11.1 C (12.0 F)
2004
-11.1 C (12.0 F)
2005
-8.3 C (17.1 F)
2006
-6.1 C (21.0 F)
2007
-10.0 C (14.0 F)
2008
-7.2 C (19.0 F)
2009
-5.6 C (21.9 F)
2010
-9.4 C (15.1 F)
2011
-12.8 C (9.0 F)
2012
-7.2 C (19.0 F)
2013
-7.2 C (19.0 F)
2014
-11.1 C (12.0 F)
2015
-10.0 C (14.0 F)
2016
-10.0 C (14.0 F)
2017
-11.1 C (12.0 F)
2018
-9.4 C (15.1 F)
2019
-4.4 C (24.1 F)
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Lavon Dam, 1949 to 2026. The record is 199.4 mm (7.9 in) in 1967, marked on the chart; the median year is 79.9 mm (3.1 in).
Wettest day (Rx1day) at Lavon Dam by year
Year
Wettest day (Rx1day)
1949
71.6 mm (2.8 in)
1950
102.1 mm (4.0 in)
1951
56.1 mm (2.2 in)
1952
71.9 mm (2.8 in)
1953
78.0 mm (3.1 in)
1954
45.7 mm (1.8 in)
1955
45.5 mm (1.8 in)
1956
63.8 mm (2.5 in)
1957
78.2 mm (3.1 in)
1958
133.6 mm (5.3 in)
1959
69.6 mm (2.7 in)
1960
48.3 mm (1.9 in)
1961
65.5 mm (2.6 in)
1962
81.0 mm (3.2 in)
1963
54.1 mm (2.1 in)
1964
135.9 mm (5.4 in)
1965
89.9 mm (3.5 in)
1966
82.0 mm (3.2 in)
1967
199.4 mm (7.9 in)
1968
51.3 mm (2.0 in)
1969
89.4 mm (3.5 in)
1970
85.1 mm (3.4 in)
1971
100.1 mm (3.9 in)
1972
41.1 mm (1.6 in)
1973
97.8 mm (3.9 in)
1974
101.6 mm (4.0 in)
1975
50.3 mm (2.0 in)
1976
48.3 mm (1.9 in)
1977
43.7 mm (1.7 in)
1978
64.5 mm (2.5 in)
1979
109.7 mm (4.3 in)
1980
99.3 mm (3.9 in)
1981
82.0 mm (3.2 in)
1982
154.4 mm (6.1 in)
1983
87.6 mm (3.4 in)
1984
56.1 mm (2.2 in)
1985
84.8 mm (3.3 in)
1986
142.2 mm (5.6 in)
1987
87.4 mm (3.4 in)
1988
69.6 mm (2.7 in)
1989
128.0 mm (5.0 in)
1990
101.6 mm (4.0 in)
1991
99.1 mm (3.9 in)
1992
69.3 mm (2.7 in)
1993
66.8 mm (2.6 in)
1994
74.2 mm (2.9 in)
1995
72.4 mm (2.9 in)
1996
120.9 mm (4.8 in)
1997
70.9 mm (2.8 in)
1998
102.4 mm (4.0 in)
1999
99.3 mm (3.9 in)
2000
95.3 mm (3.8 in)
2001
78.7 mm (3.1 in)
2002
99.6 mm (3.9 in)
2003
67.3 mm (2.6 in)
2004
78.0 mm (3.1 in)
2005
51.6 mm (2.0 in)
2006
72.4 mm (2.9 in)
2007
73.9 mm (2.9 in)
2008
121.7 mm (4.8 in)
2009
97.8 mm (3.9 in)
2010
68.6 mm (2.7 in)
2011
45.2 mm (1.8 in)
2012
99.1 mm (3.9 in)
2013
50.8 mm (2.0 in)
2014
64.5 mm (2.5 in)
2015
172.7 mm (6.8 in)
2016
101.1 mm (4.0 in)
2017
81.5 mm (3.2 in)
2018
191.0 mm (7.5 in)
2019
132.1 mm (5.2 in)
2020
73.2 mm (2.9 in)
2021
102.6 mm (4.0 in)
2022
63.2 mm (2.5 in)
2023
81.3 mm (3.2 in)
2024
70.9 mm (2.8 in)
2025
118.6 mm (4.7 in)
2026
61.2 mm (2.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lavon Dam, 1949 to 2026. The record is 238.5 mm (9.4 in) in 1991, marked on the chart; the median year is 124.4 mm (4.9 in).
Wettest five days (Rx5day) at Lavon Dam by year
Year
Wettest five days (Rx5day)
1949
94.4 mm (3.7 in)
1950
139.0 mm (5.5 in)
1951
66.3 mm (2.6 in)
1952
106.9 mm (4.2 in)
1953
78.0 mm (3.1 in)
1954
98.8 mm (3.9 in)
1955
74.5 mm (2.9 in)
1956
144.6 mm (5.7 in)
1957
176.5 mm (6.9 in)
1958
175.2 mm (6.9 in)
1959
143.8 mm (5.7 in)
1960
122.7 mm (4.8 in)
1961
76.8 mm (3.0 in)
1962
141.5 mm (5.6 in)
1963
112.5 mm (4.4 in)
1964
205.0 mm (8.1 in)
1965
129.6 mm (5.1 in)
1966
235.4 mm (9.3 in)
1967
223.3 mm (8.8 in)
1968
125.6 mm (4.9 in)
1969
153.1 mm (6.0 in)
1970
124.5 mm (4.9 in)
1971
161.9 mm (6.4 in)
1972
84.8 mm (3.3 in)
1973
141.2 mm (5.6 in)
1974
156.3 mm (6.2 in)
1975
108.8 mm (4.3 in)
1976
82.3 mm (3.2 in)
1977
80.1 mm (3.2 in)
1978
90.1 mm (3.5 in)
1979
129.7 mm (5.1 in)
1980
177.3 mm (7.0 in)
1981
120.4 mm (4.7 in)
1982
173.2 mm (6.8 in)
1983
113.9 mm (4.5 in)
1984
99.8 mm (3.9 in)
1985
90.6 mm (3.6 in)
1986
156.7 mm (6.2 in)
1987
95.0 mm (3.7 in)
1988
70.4 mm (2.8 in)
1989
174.2 mm (6.9 in)
1990
135.7 mm (5.3 in)
1991
238.5 mm (9.4 in)
1992
131.4 mm (5.2 in)
1993
123.7 mm (4.9 in)
1994
124.2 mm (4.9 in)
1995
113.3 mm (4.5 in)
1996
134.8 mm (5.3 in)
1997
112.5 mm (4.4 in)
1998
128.1 mm (5.0 in)
1999
99.3 mm (3.9 in)
2000
154.2 mm (6.1 in)
2001
114.3 mm (4.5 in)
2002
103.2 mm (4.1 in)
2003
83.1 mm (3.3 in)
2004
86.9 mm (3.4 in)
2005
72.7 mm (2.9 in)
2006
125.0 mm (4.9 in)
2007
147.8 mm (5.8 in)
2008
121.7 mm (4.8 in)
2009
178.6 mm (7.0 in)
2010
126.3 mm (5.0 in)
2011
93.5 mm (3.7 in)
2012
124.9 mm (4.9 in)
2013
99.6 mm (3.9 in)
2014
92.9 mm (3.7 in)
2015
235.5 mm (9.3 in)
2016
106.4 mm (4.2 in)
2017
152.6 mm (6.0 in)
2018
210.8 mm (8.3 in)
2019
146.8 mm (5.8 in)
2020
125.0 mm (4.9 in)
2021
102.6 mm (4.0 in)
2022
122.1 mm (4.8 in)
2023
140.5 mm (5.5 in)
2024
149.9 mm (5.9 in)
2025
122.6 mm (4.8 in)
2026
69.4 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lavon Dam, 1949 to 2026. The record is 64 days in 2000, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Lavon Dam by year
Year
Longest dry spell (CDD)
1949
22 days
1950
47 days
1951
30 days
1952
40 days
1953
43 days
1954
26 days
1955
39 days
1956
41 days
1957
56 days
1958
28 days
1959
27 days
1960
17 days
1961
21 days
1962
27 days
1963
40 days
1964
42 days
1965
28 days
1966
25 days
1967
29 days
1968
16 days
1969
29 days
1970
31 days
1971
29 days
1972
37 days
1973
28 days
1974
19 days
1975
34 days
1976
22 days
1977
35 days
1978
39 days
1979
27 days
1980
34 days
1981
30 days
1982
22 days
1983
21 days
1984
18 days
1985
51 days
1986
25 days
1987
29 days
1988
42 days
1989
22 days
1990
19 days
1991
30 days
1992
24 days
1993
39 days
1994
14 days
1995
36 days
1996
24 days
1997
30 days
1998
35 days
1999
32 days
2000
64 days
2001
28 days
2002
23 days
2003
30 days
2004
23 days
2005
31 days
2006
40 days
2007
32 days
2008
28 days
2009
20 days
2010
27 days
2011
52 days
2012
49 days
2013
26 days
2014
22 days
2015
41 days
2016
30 days
2017
36 days
2018
54 days
2019
20 days
2020
24 days
2021
40 days
2022
26 days
2023
48 days
2024
25 days
2025
32 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Lavon Dam falls on 17 March and the median first autumn frost on 11 November, which leaves a median of 240 days between them.
Fitted over all years, the growing season changes by +2.4 days per decade at this station.
Frost dates and growing season at Lavon Dam
Measure
Median, all years
Earliest period
Recent period (1964 to 2012)
Recent against earliest
Fitted trend
Last spring frost
17 March
n/a
19 March
n/a
-0.8 days per decade
First autumn frost
11 November
n/a
15 November
n/a
+1.6 days per decade
Growing days
240 days
n/a
241 days
n/a
+2.4 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
70 years, 1950 to 2025
A day with at least 79.8 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 186.6 mm (7.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Lavon 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
79.8 mm (3.1 in)
5 years
106.7 mm (4.2 in)
10 years
125.2 mm (4.9 in)
25 years
149.3 mm (5.9 in)
50 years
167.8 mm (6.6 in)
100 years
186.6 mm (7.3 in)
Longer than the 70 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, 70 years of values from 1950 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: 199.4 mm (7.9 in) in 1967; 172.7 mm (6.8 in) in 2015; 154.4 mm (6.1 in) in 1982.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Lavon Dam standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lavon 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.