Dilley Weather Records (USC00412458)

Record envelope, standing records and threshold days for Dilley (USC00412458), Texas, United States, with 99 years of record.

Key Facts for Dilley

Dilley (USC00412458) is a weather station in Texas, United States at 28.68 latitude and -99.18 longitude, 168 m (550 ft) above sea level.
The station reports from 1910 to 2008, 99 years of record.
1,464 records set at Dilley still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Dilley tied a daily record high minimum temperature of 25.6 C (78.1 F) on 27 May 2008.

About the Station

Location: Texas, United States, 28.68 latitude, -99.18 longitude.
Elevation: 168 m (550 ft).
Period of record: 1910 to 2008, 99 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Dilley. 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 Dilley, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	34.4 C (93.9 F)	-12.8 C (9.0 F)	n/a	n/a
Feb	37.2 C (99.0 F)	-12.8 C (9.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	-5.6 C (21.9 F)	n/a	n/a
Apr	42.8 C (109.0 F)	-0.6 C (30.9 F)	n/a	n/a
May	43.3 C (109.9 F)	6.1 C (43.0 F)	n/a	n/a
Jun	43.3 C (109.9 F)	11.1 C (52.0 F)	n/a	n/a
Jul	43.9 C (111.0 F)	15.6 C (60.1 F)	n/a	n/a
Aug	43.3 C (109.9 F)	16.1 C (61.0 F)	n/a	n/a
Sep	43.3 C (109.9 F)	5.6 C (42.1 F)	n/a	n/a
Oct	40.0 C (104.0 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	35.6 C (96.1 F)	-4.4 C (24.1 F)	n/a	n/a
Dec	35.0 C (95.0 F)	-11.1 C (12.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Dilley still stand. 1917 holds the most, with 68.

Standing records at Dilley by the year they were set
Year set	Standing records
1916	26
1917	68
1918	39
1919	24
1920	24
1921	20
1922	10
1923	12
1924	32
1925	19
1926	19
1927	20
1928	12
1929	11
1930	20
1931	15
1932	16
1933	25
1934	13
1935	7
1936	18
1937	17
1938	18
1939	16
1940	22
1941	4
1942	12
1943	15
1944	10
1945	13
1946	12
1947	7
1948	28
1949	18
1950	27
1951	28
1952	20
1953	21
1954	13
1955	19
1956	8
1957	26
1958	10
1959	16
1960	16
1961	14
1962	19
1963	17
1964	12
1965	14
1966	15
1967	21
1968	9
1969	15
1970	15
1971	24
1972	12
1973	18
1974	23
1975	13
1976	19
1977	11
1978	12
1979	15
1980	16
1981	9
1982	19
1983	19
1984	14
1985	17
1986	19
1987	8
1991	11
1992	9
1993	6
1994	10
1995	10
1996	17
1997	15
1998	17
1999	7
2000	18
2001	5
2002	12
2003	3
2004	8
2005	12
2006	17
2007	14
2008	8

All-Time Record Progression

11 new records

11 all-time records were set at Dilley between 22 January 1940 and 1 July 2002. Each dot is a new record.

When Dilley set new all-time records
Date	Kind	Detail
1940-01-22	Record snow depth	Record snow depth 7.6 cm (3.0 in)
1946-08-29	Record daily precipitation	Record daily precipitation 150.1 mm (5.9 in)
1948-01-29	Record low maximum temperature	Record low maximum temperature -1.7 C (28.9 F)
1949-01-31	Record low minimum temperature	Record low minimum temperature -10.6 C (12.9 F)
1951-01-31	Record low maximum temperature	Record low maximum temperature -3.9 C (25.0 F)
1951-02-02	Record low minimum temperature	Record low minimum temperature -12.8 C (9.0 F)
1973-09-27	Record daily precipitation	Record daily precipitation 174.2 mm (6.9 in)
1981-10-07	Record daily precipitation	Record daily precipitation 259.1 mm (10.2 in)
1985-01-13	Record snow depth	Record snow depth 15.2 cm (6.0 in)
1986-07-24	Record high minimum temperature	Record high minimum temperature 28.3 C (82.9 F)
2002-07-01	Record daily precipitation	Record daily precipitation 266.7 mm (10.5 in)

Wettest Day of Each Month

Jul: 266.7 mm (10.5 in)

The wettest day on record for each calendar month at Dilley. The most was 266.7 mm (10.5 in) on 1 July 2002.

Record daily precipitation for each month at Dilley
Month	Record daily precipitation (mm)	Date
Jan	78.7 mm (3.1 in)	5 January 1958
Feb	73.7 mm (2.9 in)	19 February 1932
Mar	75.7 mm (3.0 in)	29 March 1922
Apr	101.6 mm (4.0 in)	25 April 1949
May	124.5 mm (4.9 in)	16 May 1980
Jun	137.2 mm (5.4 in)	14 June 1981
Jul	266.7 mm (10.5 in)	1 July 2002
Aug	252.2 mm (9.9 in)	23 August 2004
Sep	257.3 mm (10.1 in)	9 September 2002
Oct	259.1 mm (10.2 in)	7 October 1981
Nov	72.4 mm (2.9 in)	5 November 1932
Dec	142.7 mm (5.6 in)	29 December 1937

Period of Record Coverage

1916 to 2008

90 years of record at Dilley, 1916 to 2008. 5 years have data for under 90 percent of days and are left out of rankings: 1916, 1924, 1987, 1991, 2008.

Days with data per year at Dilley
Year	Days with data	Share of year	Complete
1916	185	51%	No
1917	356	98%	Yes
1918	352	96%	Yes
1919	364	100%	Yes
1920	364	99%	Yes
1921	365	100%	Yes
1922	364	100%	Yes
1923	357	98%	Yes
1924	274	75%	No
1925	355	97%	Yes
1926	346	95%	Yes
1927	350	96%	Yes
1928	351	96%	Yes
1929	354	97%	Yes
1930	352	96%	Yes
1931	355	97%	Yes
1932	361	99%	Yes
1933	360	99%	Yes
1934	358	98%	Yes
1935	355	97%	Yes
1936	361	99%	Yes
1937	353	97%	Yes
1938	358	98%	Yes
1939	357	98%	Yes
1940	352	96%	Yes
1941	356	98%	Yes
1942	355	97%	Yes
1943	352	96%	Yes
1944	355	97%	Yes
1945	347	95%	Yes
1946	355	97%	Yes
1947	343	94%	Yes
1948	366	100%	Yes
1949	352	96%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	365	100%	Yes
1953	365	100%	Yes
1954	363	99%	Yes
1955	361	99%	Yes
1956	363	99%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	364	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	348	95%	Yes
1965	350	96%	Yes
1966	364	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	362	99%	Yes
1970	363	99%	Yes
1971	362	99%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	363	99%	Yes
1975	364	100%	Yes
1976	365	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	362	99%	Yes
1981	364	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	365	100%	Yes
1985	364	100%	Yes
1986	365	100%	Yes
1987	181	50%	No
1991	238	65%	No
1992	366	100%	Yes
1993	365	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	357	98%	Yes
1998	365	100%	Yes
1999	364	100%	Yes
2000	361	99%	Yes
2001	352	96%	Yes
2002	329	90%	Yes
2003	362	99%	Yes
2004	365	100%	Yes
2005	341	93%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	182	50%	No

Latest Records

Latest records at Dilley
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 May 2008	Dilley, US	daily high min (Tie)	25.6 C (78.1 F)	tie	12 years	3 of 100 (Routine)
26 May 2008	Dilley, US	daily high min (Tie)	25.0 C (77.0 F)	tie	51 years	6 of 100 (Routine)
23 May 2008	Dilley, US	daily high min	25.6 C (78.1 F)	0.6 C (1.1 F)	81 years	34 of 100 (Routine)
20 May 2008	Dilley, US	daily high min (Tie)	23.9 C (75.0 F)	tie	90 years	9 of 100 (Routine)
12 May 2008	Dilley, US	daily high max (Tie)	37.8 C (100.0 F)	tie	41 years	5 of 100 (Routine)
29 April 2008	Dilley, US	daily low min	8.3 C (46.9 F)	1.1 C (2.0 F)	39 years	22 of 100 (Routine)
23 April 2008	Dilley, US	daily high min (Tie)	22.2 C (72.0 F)	tie	41 years	5 of 100 (Routine)
10 April 2008	Dilley, US	daily high min	22.2 C (72.0 F)	0.5 C (0.9 F)	81 years	34 of 100 (Routine)
18 March 2008	Dilley, US	daily high max (Tie)	33.9 C (93.0 F)	tie	57 years	6 of 100 (Routine)
16 March 2008	Dilley, US	daily high max	35.0 C (95.0 F)	1.1 C (2.0 F)	60 years	28 of 100 (Routine)
15 March 2008	Dilley, US	daily high max	37.8 C (100.0 F)	2.8 C (5.0 F)	91 years	40 of 100 (Notable)
26 February 2008	Dilley, US	daily high max	36.1 C (97.0 F)	0.5 C (0.9 F)	90 years	36 of 100 (Notable)
5 February 2008	Dilley, US	daily high min	18.3 C (64.9 F)	1.6 C (2.9 F)	80 years	36 of 100 (Notable)
5 February 2008	Dilley, US	daily high max	33.3 C (91.9 F)	1.6 C (2.9 F)	50 years	26 of 100 (Routine)
4 February 2008	Dilley, US	daily high max (Tie)	30.0 C (86.0 F)	tie	4 years	2 of 100 (Routine)
22 December 2007	Dilley, US	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	65 years	29 of 100 (Routine)
9 December 2007	Dilley, US	daily high min	18.9 C (66.0 F)	1.1 C (2.0 F)	13 years	15 of 100 (Routine)
8 December 2007	Dilley, US	daily high max (Tie)	30.0 C (86.0 F)	tie	40 years	5 of 100 (Routine)
22 November 2007	Dilley, US	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	82 years	35 of 100 (Notable)
30 September 2007	Dilley, US	daily rain	18.3 mm (0.7 in)	4.6 mm (0.18 in)	21 years	17 of 100 (Routine)

Climate Trend

77 complete years, 1917 to 2007

One stripe for each of 77 complete years at Dilley, 1917 to 2007. Blue stripes are years cooler than the station's own mean of 21.4 C (70.5 F); red stripes are warmer. The coolest year was 1968, at 19.9 C (67.7 F), and the warmest was 1917, at 23.1 C (73.5 F). The strongest colour marks a difference of 1.7 C (3.1 F).

Annual mean temperature at Dilley as warming stripes, 1917 to 2007
Year	Annual mean temperature	Difference from the station mean
1917	23.1 C	+1.67 C
1918	22.4 C	+0.97 C
1919	20.8 C	-0.61 C
1920	21.1 C	-0.32 C
1921	22.1 C	+0.73 C
1922	21.5 C	+0.10 C
1923	21.3 C	-0.11 C
1925	21.9 C	+0.53 C
1926	21.9 C	+0.50 C
1927	22.8 C	+1.46 C
1928	21.3 C	-0.12 C
1929	21.2 C	-0.20 C
1930	20.4 C	-0.97 C
1931	21.2 C	-0.21 C
1932	21.4 C	+0.04 C
1933	23.0 C	+1.59 C
1934	22.3 C	+0.95 C
1935	21.7 C	+0.34 C
1936	21.0 C	-0.40 C
1937	22.0 C	+0.62 C
1938	22.3 C	+0.95 C
1939	22.2 C	+0.83 C
1940	20.6 C	-0.74 C
1941	21.2 C	-0.23 C
1942	21.3 C	-0.07 C
1943	21.1 C	-0.29 C
1944	20.9 C	-0.52 C
1946	22.0 C	+0.65 C
1948	21.6 C	+0.17 C
1949	21.2 C	-0.17 C
1950	22.2 C	+0.81 C
1951	21.7 C	+0.32 C
1952	21.0 C	-0.34 C
1953	22.0 C	+0.60 C
1954	22.4 C	+1.04 C
1955	21.9 C	+0.55 C
1956	22.2 C	+0.85 C
1957	21.4 C	-0.02 C
1958	20.1 C	-1.24 C
1959	20.4 C	-0.94 C
1960	20.4 C	-0.96 C
1961	20.8 C	-0.56 C
1962	22.0 C	+0.62 C
1963	21.5 C	+0.10 C
1965	21.0 C	-0.39 C
1966	20.4 C	-0.94 C
1967	21.4 C	-0.01 C
1968	19.9 C	-1.53 C
1969	21.0 C	-0.34 C
1970	20.1 C	-1.27 C
1971	21.4 C	0.00 C
1972	20.7 C	-0.70 C
1973	20.4 C	-1.03 C
1974	20.7 C	-0.67 C
1975	21.1 C	-0.33 C
1976	20.0 C	-1.34 C
1977	21.5 C	+0.07 C
1978	20.8 C	-0.56 C
1979	20.7 C	-0.68 C
1980	21.7 C	+0.34 C
1981	21.5 C	+0.07 C
1982	21.7 C	+0.33 C
1983	21.0 C	-0.35 C
1984	22.1 C	+0.75 C
1985	21.2 C	-0.21 C
1986	21.8 C	+0.46 C
1992	20.9 C	-0.48 C
1993	20.7 C	-0.64 C
1996	21.7 C	+0.32 C
1997	20.7 C	-0.67 C
1998	22.3 C	+0.92 C
1999	22.1 C	+0.72 C
2000	22.3 C	+0.95 C
2001	21.7 C	+0.28 C
2003	21.2 C	-0.19 C
2004	21.1 C	-0.33 C
2007	20.9 C	-0.44 C

The annual mean temperature here has fallen by 0.07 C (0.00 to 0.13) per decade over 1917 to 2007. In Fahrenheit: 0.12 F (0.01 to 0.23) per decade. The slope is a straight line fitted to 77 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Dilley
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.07 C (-0.13 to 0.00) per decade	-0.12 F (-0.23 to -0.01) per decade	1917 to 2007	77	Fall
Mean daily maximum	-0.12 C (-0.20 to -0.04) per decade	-0.2 F (-0.4 to -0.1) per decade	1917 to 2007	77	Fall
Mean daily minimum	-0.01 C (-0.08 to 0.06) per decade	-0.03 F (-0.15 to 0.10) per decade	1917 to 2007	77	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

1910 to 2008

Yearly extremes at Dilley: 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)	1939	40.9 C (105.5 F)	90
Coldest night (TNn)	-12.8 C (9.0 F)	1951	-4.4 C (24.1 F)	90
Wettest day (Rx1day)	266.7 mm (10.5 in)	2002	72.6 mm (2.9 in)	96
Wettest five days (Rx5day)	367.8 mm (14.5 in)	2002	96.6 mm (3.8 in)	96
Longest dry spell (CDD)	115 days	1912	43 days	96

Hottest day (TXx)

The hottest day of the year at Dilley, 1910 to 2008. The record is 43.9 C (111.0 F) in 1939, marked on the chart; the median year is 40.9 C (105.5 F).

Hottest day (TXx) at Dilley by year
Year	Hottest day (TXx)
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	42.8 C (109.0 F)
1917	43.3 C (109.9 F)
1918	41.7 C (107.1 F)
1919	39.4 C (102.9 F)
1920	40.0 C (104.0 F)
1921	40.0 C (104.0 F)
1922	39.4 C (102.9 F)
1923	40.0 C (104.0 F)
1924	41.1 C (106.0 F)
1925	41.1 C (106.0 F)
1926	41.7 C (107.1 F)
1927	43.3 C (109.9 F)
1928	40.0 C (104.0 F)
1929	39.4 C (102.9 F)
1930	40.6 C (105.1 F)
1931	37.8 C (100.0 F)
1932	41.7 C (107.1 F)
1933	41.7 C (107.1 F)
1934	41.7 C (107.1 F)
1935	39.4 C (102.9 F)
1936	41.7 C (107.1 F)
1937	41.7 C (107.1 F)
1938	41.7 C (107.1 F)
1939	43.9 C (111.0 F)
1940	41.1 C (106.0 F)
1941	40.6 C (105.1 F)
1942	43.3 C (109.9 F)
1943	41.1 C (106.0 F)
1944	42.8 C (109.0 F)
1945	41.7 C (107.1 F)
1946	43.3 C (109.9 F)
1947	41.1 C (106.0 F)
1948	41.7 C (107.1 F)
1949	41.1 C (106.0 F)
1950	40.6 C (105.1 F)
1951	41.1 C (106.0 F)
1952	40.6 C (105.1 F)
1953	42.2 C (108.0 F)
1954	42.8 C (109.0 F)
1955	41.7 C (107.1 F)
1956	41.7 C (107.1 F)
1957	41.1 C (106.0 F)
1958	40.6 C (105.1 F)
1959	41.7 C (107.1 F)
1960	42.8 C (109.0 F)
1961	40.6 C (105.1 F)
1962	43.3 C (109.9 F)
1963	40.0 C (104.0 F)
1964	41.1 C (106.0 F)
1965	40.6 C (105.1 F)
1966	40.0 C (104.0 F)
1967	41.1 C (106.0 F)
1968	38.9 C (102.0 F)
1969	42.8 C (109.0 F)
1970	39.4 C (102.9 F)
1971	39.4 C (102.9 F)
1972	41.7 C (107.1 F)
1973	40.0 C (104.0 F)
1974	41.7 C (107.1 F)
1975	40.0 C (104.0 F)
1976	38.9 C (102.0 F)
1977	41.1 C (106.0 F)
1978	39.4 C (102.9 F)
1979	41.1 C (106.0 F)
1980	42.8 C (109.0 F)
1981	39.4 C (102.9 F)
1982	40.0 C (104.0 F)
1983	40.0 C (104.0 F)
1984	42.8 C (109.0 F)
1985	40.6 C (105.1 F)
1986	42.2 C (108.0 F)
1987	36.7 C (98.1 F)
1991	40.6 C (105.1 F)
1992	40.6 C (105.1 F)
1993	38.9 C (102.0 F)
1994	40.0 C (104.0 F)
1995	40.6 C (105.1 F)
1996	40.0 C (104.0 F)
1997	39.4 C (102.9 F)
1998	42.8 C (109.0 F)
1999	40.0 C (104.0 F)
2000	43.3 C (109.9 F)
2001	40.0 C (104.0 F)
2002	39.4 C (102.9 F)
2003	40.0 C (104.0 F)
2004	38.9 C (102.0 F)
2005	41.1 C (106.0 F)
2006	40.6 C (105.1 F)
2007	36.7 C (98.1 F)
2008	38.9 C (102.0 F)

Coldest night (TNn)

The coldest night of the year at Dilley, 1910 to 2008. The record is -12.8 C (9.0 F) in 1951, marked on the chart; the median year is -4.4 C (24.1 F).

Coldest night (TNn) at Dilley by year
Year	Coldest night (TNn)
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	n/a
1916	7.2 C (45.0 F)
1917	-6.7 C (19.9 F)
1918	-10.0 C (14.0 F)
1919	-3.9 C (25.0 F)
1920	-3.3 C (26.1 F)
1921	-1.1 C (30.0 F)
1922	-4.4 C (24.1 F)
1923	-5.0 C (23.0 F)
1924	-4.4 C (24.1 F)
1925	-5.6 C (21.9 F)
1926	-3.9 C (25.0 F)
1927	-3.9 C (25.0 F)
1928	-7.8 C (18.0 F)
1929	-6.1 C (21.0 F)
1930	-9.4 C (15.1 F)
1931	-0.6 C (30.9 F)
1932	-4.4 C (24.1 F)
1933	-8.3 C (17.1 F)
1934	-1.7 C (28.9 F)
1935	-6.7 C (19.9 F)
1936	-5.6 C (21.9 F)
1937	-2.8 C (27.0 F)
1938	-3.3 C (26.1 F)
1939	-2.2 C (28.0 F)
1940	-8.9 C (16.0 F)
1941	-3.3 C (26.1 F)
1942	-3.9 C (25.0 F)
1943	-6.7 C (19.9 F)
1944	-5.6 C (21.9 F)
1945	-2.8 C (27.0 F)
1946	-1.1 C (30.0 F)
1947	-5.0 C (23.0 F)
1948	-5.0 C (23.0 F)
1949	-10.6 C (12.9 F)
1950	-7.2 C (19.0 F)
1951	-12.8 C (9.0 F)
1952	-2.2 C (28.0 F)
1953	-4.4 C (24.1 F)
1954	-3.9 C (25.0 F)
1955	-3.9 C (25.0 F)
1956	-4.4 C (24.1 F)
1957	-6.1 C (21.0 F)
1958	-3.9 C (25.0 F)
1959	-3.9 C (25.0 F)
1960	-5.6 C (21.9 F)
1961	-3.3 C (26.1 F)
1962	-12.8 C (9.0 F)
1963	-10.6 C (12.9 F)
1964	-8.3 C (17.1 F)
1965	-3.9 C (25.0 F)
1966	-7.2 C (19.0 F)
1967	-5.6 C (21.9 F)
1968	-4.4 C (24.1 F)
1969	-5.6 C (21.9 F)
1970	-8.3 C (17.1 F)
1971	-4.4 C (24.1 F)
1972	-5.6 C (21.9 F)
1973	-7.8 C (18.0 F)
1974	-5.0 C (23.0 F)
1975	-8.9 C (16.0 F)
1976	-7.2 C (19.0 F)
1977	-6.7 C (19.9 F)
1978	-6.1 C (21.0 F)
1979	-8.3 C (17.1 F)
1980	-5.6 C (21.9 F)
1981	-5.6 C (21.9 F)
1982	-7.8 C (18.0 F)
1983	-11.1 C (12.0 F)
1984	-3.9 C (25.0 F)
1985	-8.3 C (17.1 F)
1986	-1.7 C (28.9 F)
1987	-2.2 C (28.0 F)
1991	-1.1 C (30.0 F)
1992	-1.7 C (28.9 F)
1993	-3.3 C (26.1 F)
1994	-4.4 C (24.1 F)
1995	-2.8 C (27.0 F)
1996	-7.8 C (18.0 F)
1997	-5.0 C (23.0 F)
1998	-3.3 C (26.1 F)
1999	-3.9 C (25.0 F)
2000	-3.3 C (26.1 F)
2001	-0.6 C (30.9 F)
2002	-6.7 C (19.9 F)
2003	-2.8 C (27.0 F)
2004	-4.4 C (24.1 F)
2005	-1.1 C (30.0 F)
2006	-3.3 C (26.1 F)
2007	-2.8 C (27.0 F)
2008	-3.3 C (26.1 F)

Wettest day (Rx1day)

The wettest day of the year at Dilley, 1910 to 2008. The record is 266.7 mm (10.5 in) in 2002, marked on the chart; the median year is 72.6 mm (2.9 in).

Wettest day (Rx1day) at Dilley by year
Year	Wettest day (Rx1day)
1910	49.5 mm (1.9 in)
1911	45.7 mm (1.8 in)
1912	63.5 mm (2.5 in)
1913	69.9 mm (2.8 in)
1914	99.1 mm (3.9 in)
1915	76.2 mm (3.0 in)
1916	91.4 mm (3.6 in)
1917	54.6 mm (2.1 in)
1918	61.7 mm (2.4 in)
1919	102.1 mm (4.0 in)
1920	81.8 mm (3.2 in)
1921	46.0 mm (1.8 in)
1922	116.8 mm (4.6 in)
1923	64.3 mm (2.5 in)
1924	64.8 mm (2.6 in)
1925	52.1 mm (2.1 in)
1926	78.5 mm (3.1 in)
1927	68.6 mm (2.7 in)
1928	78.0 mm (3.1 in)
1929	83.8 mm (3.3 in)
1930	69.3 mm (2.7 in)
1931	102.6 mm (4.0 in)
1932	73.7 mm (2.9 in)
1933	57.2 mm (2.3 in)
1934	64.0 mm (2.5 in)
1935	129.5 mm (5.1 in)
1936	92.7 mm (3.6 in)
1937	142.7 mm (5.6 in)
1938	67.3 mm (2.6 in)
1939	48.3 mm (1.9 in)
1940	70.6 mm (2.8 in)
1941	58.9 mm (2.3 in)
1942	67.8 mm (2.7 in)
1943	45.0 mm (1.8 in)
1944	43.2 mm (1.7 in)
1945	62.2 mm (2.4 in)
1946	150.1 mm (5.9 in)
1947	124.2 mm (4.9 in)
1948	79.0 mm (3.1 in)
1949	101.6 mm (4.0 in)
1950	92.2 mm (3.6 in)
1951	90.2 mm (3.6 in)
1952	37.1 mm (1.5 in)
1953	59.9 mm (2.4 in)
1954	54.6 mm (2.1 in)
1955	62.5 mm (2.5 in)
1956	36.8 mm (1.4 in)
1957	66.0 mm (2.6 in)
1958	78.7 mm (3.1 in)
1959	104.1 mm (4.1 in)
1960	90.4 mm (3.6 in)
1961	55.4 mm (2.2 in)
1962	52.1 mm (2.1 in)
1963	59.2 mm (2.3 in)
1964	52.3 mm (2.1 in)
1965	52.3 mm (2.1 in)
1966	71.9 mm (2.8 in)
1967	96.8 mm (3.8 in)
1968	109.5 mm (4.3 in)
1969	121.9 mm (4.8 in)
1970	66.8 mm (2.6 in)
1971	97.0 mm (3.8 in)
1972	74.9 mm (2.9 in)
1973	174.2 mm (6.9 in)
1974	90.9 mm (3.6 in)
1975	93.0 mm (3.7 in)
1976	74.9 mm (2.9 in)
1977	36.6 mm (1.4 in)
1978	91.4 mm (3.6 in)
1979	110.5 mm (4.4 in)
1980	124.5 mm (4.9 in)
1981	259.1 mm (10.2 in)
1982	54.4 mm (2.1 in)
1983	52.8 mm (2.1 in)
1984	42.4 mm (1.7 in)
1985	88.1 mm (3.5 in)
1986	98.0 mm (3.9 in)
1987	74.9 mm (2.9 in)
1991	29.5 mm (1.2 in)
1992	117.6 mm (4.6 in)
1993	34.3 mm (1.4 in)
1994	91.2 mm (3.6 in)
1995	42.4 mm (1.7 in)
1996	63.0 mm (2.5 in)
1997	121.9 mm (4.8 in)
1998	140.2 mm (5.5 in)
1999	70.4 mm (2.8 in)
2000	41.9 mm (1.6 in)
2001	38.1 mm (1.5 in)
2002	266.7 mm (10.5 in)
2003	124.2 mm (4.9 in)
2004	252.2 mm (9.9 in)
2005	73.2 mm (2.9 in)
2006	55.6 mm (2.2 in)
2007	76.2 mm (3.0 in)
2008	17.8 mm (0.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Dilley, 1910 to 2008. The record is 367.8 mm (14.5 in) in 2002, marked on the chart; the median year is 96.6 mm (3.8 in).

Wettest five days (Rx5day) at Dilley by year
Year	Wettest five days (Rx5day)
1910	62.2 mm (2.4 in)
1911	49.5 mm (1.9 in)
1912	82.6 mm (3.3 in)
1913	89.0 mm (3.5 in)
1914	128.3 mm (5.1 in)
1915	76.2 mm (3.0 in)
1916	95.5 mm (3.8 in)
1917	78.8 mm (3.1 in)
1918	89.0 mm (3.5 in)
1919	112.5 mm (4.4 in)
1920	112.8 mm (4.4 in)
1921	87.1 mm (3.4 in)
1922	153.1 mm (6.0 in)
1923	81.9 mm (3.2 in)
1924	95.8 mm (3.8 in)
1925	63.2 mm (2.5 in)
1926	79.8 mm (3.1 in)
1927	68.6 mm (2.7 in)
1928	82.3 mm (3.2 in)
1929	114.0 mm (4.5 in)
1930	129.3 mm (5.1 in)
1931	163.8 mm (6.4 in)
1932	99.3 mm (3.9 in)
1933	67.6 mm (2.7 in)
1934	90.7 mm (3.6 in)
1935	215.4 mm (8.5 in)
1936	140.2 mm (5.5 in)
1937	157.5 mm (6.2 in)
1938	156.7 mm (6.2 in)
1939	78.0 mm (3.1 in)
1940	109.5 mm (4.3 in)
1941	93.2 mm (3.7 in)
1942	137.2 mm (5.4 in)
1943	66.1 mm (2.6 in)
1944	80.3 mm (3.2 in)
1945	79.8 mm (3.1 in)
1946	184.8 mm (7.3 in)
1947	134.7 mm (5.3 in)
1948	97.3 mm (3.8 in)
1949	118.1 mm (4.6 in)
1950	113.2 mm (4.5 in)
1951	112.3 mm (4.4 in)
1952	65.8 mm (2.6 in)
1953	79.0 mm (3.1 in)
1954	88.4 mm (3.5 in)
1955	90.4 mm (3.6 in)
1956	36.8 mm (1.4 in)
1957	158.0 mm (6.2 in)
1958	107.8 mm (4.2 in)
1959	111.0 mm (4.4 in)
1960	109.2 mm (4.3 in)
1961	66.3 mm (2.6 in)
1962	74.7 mm (2.9 in)
1963	78.2 mm (3.1 in)
1964	58.4 mm (2.3 in)
1965	105.9 mm (4.2 in)
1966	102.9 mm (4.1 in)
1967	174.3 mm (6.9 in)
1968	171.8 mm (6.8 in)
1969	128.5 mm (5.1 in)
1970	81.0 mm (3.2 in)
1971	185.9 mm (7.3 in)
1972	90.4 mm (3.6 in)
1973	178.0 mm (7.0 in)
1974	205.4 mm (8.1 in)
1975	146.6 mm (5.8 in)
1976	104.4 mm (4.1 in)
1977	76.0 mm (3.0 in)
1978	116.2 mm (4.6 in)
1979	189.5 mm (7.5 in)
1980	187.0 mm (7.4 in)
1981	264.9 mm (10.4 in)
1982	67.0 mm (2.6 in)
1983	57.9 mm (2.3 in)
1984	90.5 mm (3.6 in)
1985	103.8 mm (4.1 in)
1986	182.4 mm (7.2 in)
1987	165.3 mm (6.5 in)
1991	75.9 mm (3.0 in)
1992	123.2 mm (4.9 in)
1993	59.9 mm (2.4 in)
1994	91.2 mm (3.6 in)
1995	69.1 mm (2.7 in)
1996	64.0 mm (2.5 in)
1997	134.1 mm (5.3 in)
1998	197.4 mm (7.8 in)
1999	86.8 mm (3.4 in)
2000	82.9 mm (3.3 in)
2001	57.4 mm (2.3 in)
2002	367.8 mm (14.5 in)
2003	130.3 mm (5.1 in)
2004	267.9 mm (10.5 in)
2005	84.4 mm (3.3 in)
2006	56.1 mm (2.2 in)
2007	126.7 mm (5.0 in)
2008	21.9 mm (0.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Dilley, 1910 to 2008. The record is 115 days in 1912, marked on the chart; the median year is 43 days.

Longest dry spell (CDD) at Dilley by year
Year	Longest dry spell (CDD)
1910	73 days
1911	102 days
1912	115 days
1913	70 days
1914	76 days
1915	74 days
1916	86 days
1917	77 days
1918	43 days
1919	26 days
1920	44 days
1921	49 days
1922	25 days
1923	35 days
1924	63 days
1925	46 days
1926	33 days
1927	53 days
1928	42 days
1929	38 days
1930	33 days
1931	30 days
1932	48 days
1933	50 days
1934	49 days
1935	42 days
1936	35 days
1937	36 days
1938	39 days
1939	37 days
1940	33 days
1941	30 days
1942	27 days
1943	46 days
1944	47 days
1945	39 days
1946	45 days
1947	39 days
1948	29 days
1949	33 days
1950	96 days
1951	44 days
1952	52 days
1953	45 days
1954	83 days
1955	46 days
1956	38 days
1957	78 days
1958	31 days
1959	32 days
1960	31 days
1961	43 days
1962	46 days
1963	43 days
1964	32 days
1965	43 days
1966	67 days
1967	46 days
1968	20 days
1969	43 days
1970	61 days
1971	56 days
1972	39 days
1973	61 days
1974	30 days
1975	50 days
1976	41 days
1977	42 days
1978	49 days
1979	78 days
1980	56 days
1981	56 days
1982	37 days
1983	44 days
1984	29 days
1985	34 days
1986	50 days
1987	24 days
1991	27 days
1992	38 days
1993	65 days
1994	25 days
1995	26 days
1996	38 days
1997	25 days
1998	77 days
1999	63 days
2000	44 days
2001	46 days
2002	41 days
2003	68 days
2004	24 days
2005	39 days
2006	68 days
2007	28 days
2008	55 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

70 years with a frost

Across 70 years with a frost, the median last spring frost at Dilley falls on 24 February and the median first autumn frost on 30 November, which leaves a median of 283 days between them.

In 1966 to 2007 the median growing season was 279 days. That is 5 days fewer than in 1917 to 1953.

Fitted over all years, the growing season changes by +1.0 days per decade at this station.

Frost dates and growing season at Dilley
Measure	Median, all years	Earliest period (1917 to 1953)	Recent period (1966 to 2007)	Recent against earliest	Fitted trend
Last spring frost	24 February	23 February	25 February	2 days later	-0.4 days per decade
First autumn frost	30 November	1 December	29 November	2 days earlier	+0.6 days per decade
Growing days	283 days	284 days	279 days	5 days fewer	+1.0 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

91 years, 1911 to 2007

A day with at least 73.0 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 250.3 mm (9.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Dilley: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	73.0 mm (2.9 in)
5 years	106.0 mm (4.2 in)
10 years	132.7 mm (5.2 in)
25 years	173.2 mm (6.8 in)
50 years	209.0 mm (8.2 in)
100 years	250.3 mm (9.9 in)	Longer than the 91 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, 91 years of values from 1911 to 2007.

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 2002; 259.1 mm (10.2 in) in 1981; 252.2 mm (9.9 in) in 2004.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Dilley standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Dilley 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.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).