Alvin Weather Records (USC00410204)

Record envelope, standing records and threshold days for Alvin (USC00410204), Texas, United States, with 113 years of record.

Key Facts for Alvin

Alvin (USC00410204) is a weather station in Texas, United States at 29.37 latitude and -95.23 longitude, 9 m (28 ft) above sea level.
The station reports from 1898 to 2010, 113 years of record.
1,464 records set at Alvin still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alvin set a daily record low minimum temperature of 2.8 C (37.0 F) on 8 November 2010.

About the Station

Location: Texas, United States, 29.37 latitude, -95.23 longitude.
Elevation: 9 m (28 ft).
Period of record: 1898 to 2010, 113 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 Alvin. 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 Alvin, 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)	-10.0 C (14.0 F)	n/a	n/a
Feb	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a
Mar	34.4 C (93.9 F)	-5.6 C (21.9 F)	n/a	n/a
Apr	35.6 C (96.1 F)	-1.1 C (30.0 F)	n/a	n/a
May	40.0 C (104.0 F)	7.8 C (46.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	12.2 C (54.0 F)	n/a	n/a
Jul	42.2 C (108.0 F)	15.6 C (60.1 F)	n/a	n/a
Aug	37.8 C (100.0 F)	15.6 C (60.1 F)	n/a	n/a
Sep	37.2 C (99.0 F)	5.0 C (41.0 F)	n/a	n/a
Oct	34.4 C (93.9 F)	1.1 C (34.0 F)	n/a	n/a
Nov	32.2 C (90.0 F)	-6.7 C (19.9 F)	n/a	n/a
Dec	30.0 C (86.0 F)	-13.3 C (8.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Alvin still stand. 2000 holds the most, with 99.

Standing records at Alvin by the year they were set
Year set	Standing records
1903	39
1904	32
1911	68
1912	33
1913	46
1914	70
1915	29
1965	8
1966	28
1967	42
1968	24
1969	38
1970	28
1971	42
1972	36
1973	35
1974	12
1975	22
1976	25
1977	35
1978	32
1979	23
1980	30
1981	17
1982	36
1983	32
1984	33
1985	22
1986	28
1987	21
1988	28
1989	50
1990	27
1991	30
1992	17
1993	2
1995	14
1996	43
1997	21
1998	26
1999	14
2000	99
2003	1
2004	22
2005	13
2006	15
2007	24
2008	17
2009	24
2010	11

All-Time Record Progression

8 new records

8 all-time records were set at Alvin between 11 March 1932 and 15 July 2000. Each dot is a new record.

When Alvin set new all-time records
Date	Kind	Detail
1932-03-11	Record daily snowfall	Record daily snowfall 7.6 cm (3.0 in)
1960-02-12	Record daily snowfall	Record daily snowfall 10.2 cm (4.0 in)
1973-06-12	Record daily precipitation	Record daily precipitation 320.0 mm (12.6 in)
1979-07-26	Record daily precipitation	Record daily precipitation 654.1 mm (25.8 in)
1997-08-15	Record high minimum temperature	Record high minimum temperature 27.8 C (82.0 F)
2000-05-29	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
2000-07-12	Record high maximum temperature	Record high maximum temperature 41.7 C (107.1 F)
2000-07-15	Record high maximum temperature	Record high maximum temperature 42.2 C (108.0 F)

Wettest Day of Each Month

Jul: 654.1 mm (25.8 in)

The wettest day on record for each calendar month at Alvin. The most was 654.1 mm (25.8 in) on 26 July 1979.

Record daily precipitation for each month at Alvin
Month	Record daily precipitation (mm)	Date
Jan	106.7 mm (4.2 in)	19 January 1968
Feb	85.1 mm (3.4 in)	24 February 1985
Mar	190.5 mm (7.5 in)	17 March 1957
Apr	129.0 mm (5.1 in)	27 April 1900
May	152.4 mm (6.0 in)	28 May 1952
Jun	320.0 mm (12.6 in)	12 June 1973
Jul	654.1 mm (25.8 in)	26 July 1979
Aug	299.0 mm (11.8 in)	15 August 2002
Sep	236.2 mm (9.3 in)	13 September 2008
Oct	203.2 mm (8.0 in)	13 October 1906
Nov	158.8 mm (6.3 in)	25 November 1940
Dec	205.7 mm (8.1 in)	10 December 1922

Period of Record Coverage

1903 to 2010

50 years of record at Alvin, 1903 to 2010. 19 years have data for under 90 percent of days and are left out of rankings: 1903, 1904, 1915, 1965, 1972, 1973, 1976, 1989 and others.

Days with data per year at Alvin
Year	Days with data	Share of year	Complete
1903	239	65%	No
1904	179	49%	No
1911	364	100%	Yes
1912	365	100%	Yes
1913	364	100%	Yes
1914	364	100%	Yes
1915	207	57%	No
1965	92	25%	No
1966	365	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	334	92%	Yes
1971	365	100%	Yes
1972	304	83%	No
1973	296	81%	No
1974	364	100%	Yes
1975	364	100%	Yes
1976	273	75%	No
1977	364	100%	Yes
1978	364	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	365	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	365	100%	Yes
1986	365	100%	Yes
1987	364	100%	Yes
1988	365	100%	Yes
1989	326	89%	No
1990	288	79%	No
1991	331	91%	Yes
1992	314	86%	No
1993	64	18%	No
1995	149	41%	No
1996	362	99%	Yes
1997	300	82%	No
1998	247	68%	No
1999	121	33%	No
2000	213	58%	No
2003	60	16%	No
2004	364	99%	Yes
2005	301	82%	No
2006	347	95%	Yes
2007	350	96%	Yes
2008	350	96%	Yes
2009	357	98%	Yes
2010	314	86%	No

Latest Records

Latest records at Alvin
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 November 2010	Alvin, US	daily low min	2.8 C (37.0 F)	1.1 C (2.0 F)	96 years	40 of 100 (Notable)
7 November 2010	Alvin, US	daily low min	2.8 C (37.0 F)	2.8 C (5.0 F)	97 years	43 of 100 (Notable)
29 October 2010	Alvin, US	daily high max (Tie)	31.1 C (88.0 F)	tie	32 years	4 of 100 (Routine)
26 October 2010	Alvin, US	daily high max	31.1 C (88.0 F)	1.1 C (2.0 F)	19 years	17 of 100 (Routine)
7 October 2010	Alvin, US	daily low min (Tie)	8.3 C (46.9 F)	tie	24 years	4 of 100 (Routine)
24 September 2010	Alvin, US	daily high min	23.9 C (75.0 F)	0.6 C (1.1 F)	24 years	18 of 100 (Routine)
8 September 2010	Alvin, US	daily high min (Tie)	23.3 C (73.9 F)	tie	107 years	10 of 100 (Routine)
7 September 2010	Alvin, US	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	107 years	41 of 100 (Notable)
6 September 2010	Alvin, US	daily high min (Tie)	25.0 C (77.0 F)	tie	40 years	5 of 100 (Routine)
26 August 2010	Alvin, US	daily high max (Tie)	35.6 C (96.1 F)	tie	97 years	9 of 100 (Routine)
19 August 2010	Alvin, US	daily high min (Tie)	25.0 C (77.0 F)	tie	12 years	3 of 100 (Routine)
12 August 2010	Alvin, US	daily high min (Tie)	25.0 C (77.0 F)	tie	15 years	3 of 100 (Routine)
26 July 2010	Alvin, US	daily high min (Tie)	24.4 C (75.9 F)	tie	39 years	5 of 100 (Routine)
22 July 2010	Alvin, US	daily high min (Tie)	25.6 C (78.1 F)	tie	15 years	3 of 100 (Routine)
9 July 2010	Alvin, US	daily low max (Tie)	28.9 C (84.0 F)	tie	21 years	4 of 100 (Routine)
3 July 2010	Alvin, US	daily rain	101.6 mm (4.0 in)	45.2 mm (1.8 in)	73 years	47 of 100 (Notable)
2 July 2010	Alvin, US	daily rain	97.8 mm (3.9 in)	13.2 mm (0.5 in)	20 years	20 of 100 (Routine)
1 July 2010	Alvin, US	daily high min	25.6 C (78.1 F)	1.2 C (2.2 F)	99 years	47 of 100 (Notable)
30 June 2010	Alvin, US	daily rain	33.0 mm (1.3 in)	3.5 mm (0.14 in)	107 years	41 of 100 (Notable)
4 June 2010	Alvin, US	daily low max (Tie)	26.7 C (80.1 F)	tie	41 years	5 of 100 (Routine)

Climate Trend

27 complete years, 1911 to 2009

One stripe for each of 27 complete years at Alvin, 1911 to 2009. Blue stripes are years cooler than the station's own mean of 19.9 C (67.9 F); red stripes are warmer. The coolest year was 1914, at 17.7 C (63.9 F), and the warmest was 1911, at 20.9 C (69.6 F). The strongest colour marks a difference of 2.3 C (4.1 F).

Annual mean temperature at Alvin as warming stripes, 1911 to 2009
Year	Annual mean temperature	Difference from the station mean
1911	20.9 C	+0.95 C
1912	19.4 C	-0.59 C
1913	19.2 C	-0.74 C
1914	17.7 C	-2.22 C
1966	19.6 C	-0.39 C
1967	20.4 C	+0.48 C
1968	19.6 C	-0.37 C
1969	20.4 C	+0.45 C
1971	20.7 C	+0.75 C
1978	19.7 C	-0.27 C
1979	18.8 C	-1.14 C
1980	19.7 C	-0.26 C
1981	20.0 C	+0.03 C
1982	20.3 C	+0.32 C
1983	18.9 C	-1.02 C
1984	20.0 C	+0.04 C
1985	19.9 C	-0.07 C
1986	20.7 C	+0.76 C
1987	19.8 C	-0.19 C
1988	19.8 C	-0.16 C
1992	20.3 C	+0.39 C
1996	20.8 C	+0.84 C
2004	20.7 C	+0.70 C
2006	20.6 C	+0.64 C
2007	20.0 C	+0.09 C
2008	20.4 C	+0.45 C
2009	20.4 C	+0.49 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1898 to 2010

Yearly extremes at Alvin: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	42.2 C (108.0 F)	2000	36.1 C (97.0 F)	50
Coldest night (TNn)	-13.3 C (8.1 F)	1989	-4.4 C (24.1 F)	50
Wettest day (Rx1day)	654.1 mm (25.8 in)	1979	96.0 mm (3.8 in)	111
Wettest five days (Rx5day)	692.9 mm (27.3 in)	1979	148.3 mm (5.8 in)	111
Longest dry spell (CDD)	50 days	1930	26 days	111

Hottest day (TXx)

The hottest day of the year at Alvin, 1898 to 2010. The record is 42.2 C (108.0 F) in 2000, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Alvin by year
Year	Hottest day (TXx)
1898	n/a
1900	n/a
1901	n/a
1902	n/a
1903	35.6 C (96.1 F)
1904	33.3 C (91.9 F)
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	39.4 C (102.9 F)
1912	37.8 C (100.0 F)
1913	38.9 C (102.0 F)
1914	36.7 C (98.1 F)
1915	35.6 C (96.1 F)
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	32.2 C (90.0 F)
1966	35.6 C (96.1 F)
1967	36.7 C (98.1 F)
1968	36.7 C (98.1 F)
1969	37.2 C (99.0 F)
1970	36.7 C (98.1 F)
1971	36.7 C (98.1 F)
1972	37.2 C (99.0 F)
1973	35.6 C (96.1 F)
1974	36.1 C (97.0 F)
1975	36.1 C (97.0 F)
1976	37.2 C (99.0 F)
1977	36.7 C (98.1 F)
1978	35.6 C (96.1 F)
1979	34.4 C (93.9 F)
1980	37.8 C (100.0 F)
1981	35.6 C (96.1 F)
1982	36.1 C (97.0 F)
1983	35.0 C (95.0 F)
1984	35.6 C (96.1 F)
1985	36.1 C (97.0 F)
1986	36.7 C (98.1 F)
1987	35.6 C (96.1 F)
1988	36.7 C (98.1 F)
1989	36.1 C (97.0 F)
1990	37.8 C (100.0 F)
1991	35.6 C (96.1 F)
1992	35.6 C (96.1 F)
1993	28.3 C (82.9 F)
1995	37.2 C (99.0 F)
1996	35.6 C (96.1 F)
1997	36.7 C (98.1 F)
1998	37.8 C (100.0 F)
1999	34.4 C (93.9 F)
2000	42.2 C (108.0 F)
2001	n/a
2002	n/a
2003	29.4 C (84.9 F)
2004	37.2 C (99.0 F)
2005	36.1 C (97.0 F)
2006	38.3 C (100.9 F)
2007	37.2 C (99.0 F)
2008	35.6 C (96.1 F)
2009	36.7 C (98.1 F)
2010	35.6 C (96.1 F)

Coldest night (TNn)

The coldest night of the year at Alvin, 1898 to 2010. The record is -13.3 C (8.1 F) in 1989, marked on the chart; the median year is -4.4 C (24.1 F).

Coldest night (TNn) at Alvin by year
Year	Coldest night (TNn)
1898	n/a
1900	n/a
1901	n/a
1902	n/a
1903	-1.1 C (30.0 F)
1904	-3.9 C (25.0 F)
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	-10.0 C (14.0 F)
1912	-7.8 C (18.0 F)
1913	-5.0 C (23.0 F)
1914	-6.7 C (19.9 F)
1915	-6.1 C (21.0 F)
1916	n/a
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	1.7 C (35.1 F)
1966	-6.7 C (19.9 F)
1967	-3.9 C (25.0 F)
1968	-4.4 C (24.1 F)
1969	-3.9 C (25.0 F)
1970	-7.2 C (19.0 F)
1971	-3.3 C (26.1 F)
1972	-5.0 C (23.0 F)
1973	-6.1 C (21.0 F)
1974	-2.2 C (28.0 F)
1975	-4.4 C (24.1 F)
1976	-7.2 C (19.0 F)
1977	-7.2 C (19.0 F)
1978	-6.1 C (21.0 F)
1979	-8.3 C (17.1 F)
1980	-5.6 C (21.9 F)
1981	-6.7 C (19.9 F)
1982	-8.9 C (16.0 F)
1983	-11.1 C (12.0 F)
1984	-6.7 C (19.9 F)
1985	-8.3 C (17.1 F)
1986	-2.2 C (28.0 F)
1987	-2.8 C (27.0 F)
1988	-5.0 C (23.0 F)
1989	-13.3 C (8.1 F)
1990	0.6 C (33.1 F)
1991	-2.8 C (27.0 F)
1992	-3.3 C (26.1 F)
1993	-1.7 C (28.9 F)
1995	0.6 C (33.1 F)
1996	-6.1 C (21.0 F)
1997	-1.7 C (28.9 F)
1998	-3.3 C (26.1 F)
1999	-0.6 C (30.9 F)
2000	-2.2 C (28.0 F)
2001	n/a
2002	n/a
2003	-0.6 C (30.9 F)
2004	-3.3 C (26.1 F)
2005	0.0 C (32.0 F)
2006	-2.8 C (27.0 F)
2007	-4.4 C (24.1 F)
2008	-2.8 C (27.0 F)
2009	-5.0 C (23.0 F)
2010	-7.2 C (19.0 F)

Wettest day (Rx1day)

The wettest day of the year at Alvin, 1898 to 2010. The record is 654.1 mm (25.8 in) in 1979, marked on the chart; the median year is 96.0 mm (3.8 in).

Wettest day (Rx1day) at Alvin by year
Year	Wettest day (Rx1day)
1898	60.2 mm (2.4 in)
1900	220.2 mm (8.7 in)
1901	112.3 mm (4.4 in)
1902	174.2 mm (6.9 in)
1903	121.9 mm (4.8 in)
1904	83.6 mm (3.3 in)
1905	70.1 mm (2.8 in)
1906	203.2 mm (8.0 in)
1907	135.9 mm (5.4 in)
1908	109.0 mm (4.3 in)
1909	119.1 mm (4.7 in)
1910	85.3 mm (3.4 in)
1911	113.8 mm (4.5 in)
1912	139.2 mm (5.5 in)
1913	65.3 mm (2.6 in)
1914	91.4 mm (3.6 in)
1915	54.9 mm (2.2 in)
1916	83.1 mm (3.3 in)
1917	55.9 mm (2.2 in)
1918	71.1 mm (2.8 in)
1919	88.6 mm (3.5 in)
1920	90.9 mm (3.6 in)
1921	165.1 mm (6.5 in)
1922	205.7 mm (8.1 in)
1923	178.3 mm (7.0 in)
1924	121.2 mm (4.8 in)
1925	79.0 mm (3.1 in)
1926	83.8 mm (3.3 in)
1927	83.8 mm (3.3 in)
1928	114.3 mm (4.5 in)
1929	101.6 mm (4.0 in)
1930	101.6 mm (4.0 in)
1931	75.4 mm (3.0 in)
1932	152.4 mm (6.0 in)
1933	113.8 mm (4.5 in)
1934	62.2 mm (2.4 in)
1935	88.6 mm (3.5 in)
1936	82.6 mm (3.3 in)
1937	86.9 mm (3.4 in)
1938	63.5 mm (2.5 in)
1939	63.0 mm (2.5 in)
1940	158.8 mm (6.3 in)
1941	152.4 mm (6.0 in)
1942	94.0 mm (3.7 in)
1943	127.0 mm (5.0 in)
1944	109.2 mm (4.3 in)
1945	127.0 mm (5.0 in)
1946	111.8 mm (4.4 in)
1947	50.8 mm (2.0 in)
1948	72.1 mm (2.8 in)
1949	173.2 mm (6.8 in)
1950	85.9 mm (3.4 in)
1951	96.5 mm (3.8 in)
1952	152.4 mm (6.0 in)
1953	96.5 mm (3.8 in)
1954	57.2 mm (2.3 in)
1955	66.3 mm (2.6 in)
1956	50.8 mm (2.0 in)
1957	190.5 mm (7.5 in)
1958	53.3 mm (2.1 in)
1959	143.5 mm (5.6 in)
1960	196.9 mm (7.8 in)
1961	139.7 mm (5.5 in)
1962	83.8 mm (3.3 in)
1963	50.3 mm (2.0 in)
1964	122.2 mm (4.8 in)
1965	73.7 mm (2.9 in)
1966	66.0 mm (2.6 in)
1967	88.1 mm (3.5 in)
1968	185.4 mm (7.3 in)
1969	84.3 mm (3.3 in)
1970	78.7 mm (3.1 in)
1971	137.2 mm (5.4 in)
1972	144.8 mm (5.7 in)
1973	320.0 mm (12.6 in)
1974	96.5 mm (3.8 in)
1975	124.5 mm (4.9 in)
1976	73.7 mm (2.9 in)
1977	71.6 mm (2.8 in)
1978	71.1 mm (2.8 in)
1979	654.1 mm (25.8 in)
1980	97.8 mm (3.9 in)
1981	140.2 mm (5.5 in)
1982	96.0 mm (3.8 in)
1983	90.7 mm (3.6 in)
1984	133.4 mm (5.3 in)
1985	85.1 mm (3.4 in)
1986	74.7 mm (2.9 in)
1987	69.1 mm (2.7 in)
1988	151.1 mm (5.9 in)
1989	178.1 mm (7.0 in)
1990	93.5 mm (3.7 in)
1991	91.9 mm (3.6 in)
1992	91.4 mm (3.6 in)
1993	56.9 mm (2.2 in)
1995	121.9 mm (4.8 in)
1996	81.3 mm (3.2 in)
1997	116.8 mm (4.6 in)
1998	90.4 mm (3.6 in)
1999	24.1 mm (0.9 in)
2000	76.2 mm (3.0 in)
2001	129.3 mm (5.1 in)
2002	299.0 mm (11.8 in)
2003	65.5 mm (2.6 in)
2004	124.5 mm (4.9 in)
2005	68.3 mm (2.7 in)
2006	94.0 mm (3.7 in)
2007	98.0 mm (3.9 in)
2008	236.2 mm (9.3 in)
2009	101.6 mm (4.0 in)
2010	101.6 mm (4.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Alvin, 1898 to 2010. The record is 692.9 mm (27.3 in) in 1979, marked on the chart; the median year is 148.3 mm (5.8 in).

Wettest five days (Rx5day) at Alvin by year
Year	Wettest five days (Rx5day)
1898	77.0 mm (3.0 in)
1900	353.8 mm (13.9 in)
1901	151.2 mm (6.0 in)
1902	204.2 mm (8.0 in)
1903	132.1 mm (5.2 in)
1904	129.8 mm (5.1 in)
1905	172.8 mm (6.8 in)
1906	221.5 mm (8.7 in)
1907	137.4 mm (5.4 in)
1908	154.8 mm (6.1 in)
1909	119.1 mm (4.7 in)
1910	222.8 mm (8.8 in)
1911	168.2 mm (6.6 in)
1912	156.2 mm (6.1 in)
1913	202.5 mm (8.0 in)
1914	168.4 mm (6.6 in)
1915	77.5 mm (3.1 in)
1916	164.4 mm (6.5 in)
1917	57.2 mm (2.3 in)
1918	114.3 mm (4.5 in)
1919	130.3 mm (5.1 in)
1920	110.4 mm (4.3 in)
1921	275.3 mm (10.8 in)
1922	239.2 mm (9.4 in)
1923	313.0 mm (12.3 in)
1924	139.5 mm (5.5 in)
1925	124.7 mm (4.9 in)
1926	99.0 mm (3.9 in)
1927	86.3 mm (3.4 in)
1928	120.7 mm (4.8 in)
1929	128.3 mm (5.1 in)
1930	121.9 mm (4.8 in)
1931	116.0 mm (4.6 in)
1932	184.4 mm (7.3 in)
1933	202.7 mm (8.0 in)
1934	95.2 mm (3.7 in)
1935	223.3 mm (8.8 in)
1936	127.2 mm (5.0 in)
1937	94.5 mm (3.7 in)
1938	78.7 mm (3.1 in)
1939	64.5 mm (2.5 in)
1940	169.7 mm (6.7 in)
1941	210.9 mm (8.3 in)
1942	239.3 mm (9.4 in)
1943	221.2 mm (8.7 in)
1944	176.2 mm (6.9 in)
1945	256.0 mm (10.1 in)
1946	219.8 mm (8.7 in)
1947	104.1 mm (4.1 in)
1948	125.5 mm (4.9 in)
1949	347.7 mm (13.7 in)
1950	114.2 mm (4.5 in)
1951	148.3 mm (5.8 in)
1952	155.9 mm (6.1 in)
1953	167.1 mm (6.6 in)
1954	58.6 mm (2.3 in)
1955	94.2 mm (3.7 in)
1956	76.7 mm (3.0 in)
1957	264.7 mm (10.4 in)
1958	124.9 mm (4.9 in)
1959	268.2 mm (10.6 in)
1960	267.2 mm (10.5 in)
1961	236.2 mm (9.3 in)
1962	124.0 mm (4.9 in)
1963	113.2 mm (4.5 in)
1964	142.3 mm (5.6 in)
1965	102.4 mm (4.0 in)
1966	100.1 mm (3.9 in)
1967	127.7 mm (5.0 in)
1968	334.6 mm (13.2 in)
1969	104.4 mm (4.1 in)
1970	140.5 mm (5.5 in)
1971	199.7 mm (7.9 in)
1972	216.6 mm (8.5 in)
1973	406.7 mm (16.0 in)
1974	117.9 mm (4.6 in)
1975	156.6 mm (6.2 in)
1976	99.6 mm (3.9 in)
1977	96.8 mm (3.8 in)
1978	147.6 mm (5.8 in)
1979	692.9 mm (27.3 in)
1980	154.2 mm (6.1 in)
1981	204.3 mm (8.0 in)
1982	120.7 mm (4.8 in)
1983	192.5 mm (7.6 in)
1984	160.1 mm (6.3 in)
1985	126.0 mm (5.0 in)
1986	120.6 mm (4.7 in)
1987	151.2 mm (6.0 in)
1988	175.2 mm (6.9 in)
1989	210.6 mm (8.3 in)
1990	95.8 mm (3.8 in)
1991	122.9 mm (4.8 in)
1992	133.6 mm (5.3 in)
1993	73.4 mm (2.9 in)
1995	164.6 mm (6.5 in)
1996	176.7 mm (7.0 in)
1997	205.7 mm (8.1 in)
1998	181.1 mm (7.1 in)
1999	52.0 mm (2.0 in)
2000	113.8 mm (4.5 in)
2001	282.7 mm (11.1 in)
2002	382.8 mm (15.1 in)
2003	75.7 mm (3.0 in)
2004	202.7 mm (8.0 in)
2005	92.0 mm (3.6 in)
2006	106.6 mm (4.2 in)
2007	169.7 mm (6.7 in)
2008	305.3 mm (12.0 in)
2009	126.0 mm (5.0 in)
2010	276.3 mm (10.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Alvin, 1898 to 2010. The record is 50 days in 1930, marked on the chart; the median year is 26 days.

Longest dry spell (CDD) at Alvin by year
Year	Longest dry spell (CDD)
1898	14 days
1900	17 days
1901	26 days
1902	17 days
1903	32 days
1904	17 days
1905	20 days
1906	34 days
1907	28 days
1908	25 days
1909	23 days
1910	31 days
1911	29 days
1912	26 days
1913	28 days
1914	24 days
1915	35 days
1916	28 days
1917	43 days
1918	29 days
1919	14 days
1920	18 days
1921	24 days
1922	20 days
1923	26 days
1924	33 days
1925	35 days
1926	26 days
1927	34 days
1928	23 days
1929	39 days
1930	50 days
1931	31 days
1932	31 days
1933	31 days
1934	46 days
1935	46 days
1936	32 days
1937	40 days
1938	33 days
1939	35 days
1940	35 days
1941	27 days
1942	35 days
1943	35 days
1944	34 days
1945	32 days
1946	20 days
1947	25 days
1948	21 days
1949	19 days
1950	34 days
1951	20 days
1952	43 days
1953	23 days
1954	27 days
1955	28 days
1956	26 days
1957	17 days
1958	26 days
1959	21 days
1960	26 days
1961	42 days
1962	29 days
1963	28 days
1964	26 days
1965	21 days
1966	18 days
1967	30 days
1968	15 days
1969	30 days
1970	45 days
1971	30 days
1972	25 days
1973	29 days
1974	36 days
1975	31 days
1976	30 days
1977	34 days
1978	34 days
1979	32 days
1980	21 days
1981	17 days
1982	21 days
1983	27 days
1984	29 days
1985	18 days
1986	26 days
1987	27 days
1988	26 days
1989	17 days
1990	18 days
1991	28 days
1992	23 days
1993	9 days
1995	14 days
1996	26 days
1997	12 days
1998	18 days
1999	21 days
2000	18 days
2001	25 days
2002	37 days
2003	34 days
2004	23 days
2005	26 days
2006	22 days
2007	25 days
2008	37 days
2009	22 days
2010	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

25 years with a frost

Across 25 years with a frost, the median last spring frost at Alvin falls on 28 February and the median first autumn frost on 2 December, which leaves a median of 282 days between them.

Fitted over all years, the growing season changes by +3.2 days per decade at this station.

Frost dates and growing season at Alvin
Measure	Median, all years	Earliest period	Recent period (1911 to 2009)	Recent against earliest	Fitted trend
Last spring frost	28 February	n/a	28 February	n/a	-1.8 days per decade
First autumn frost	2 December	n/a	2 December	n/a	+1.4 days per decade
Growing days	282 days	n/a	282 days	n/a	+3.2 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

92 years, 1900 to 2009

A day with at least 101.9 mm (4.0 in) of rain is expected about once in 2 years. A day with at least 404.7 mm (15.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Alvin: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	101.9 mm (4.0 in)
5 years	150.5 mm (5.9 in)
10 years	192.8 mm (7.6 in)
25 years	261.3 mm (10.3 in)
50 years	325.9 mm (12.8 in)
100 years	404.7 mm (15.9 in)	Longer than the 92 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, 92 years of values from 1900 to 2009.

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: 654.1 mm (25.8 in) in 1979; 320.0 mm (12.6 in) in 1973; 299.0 mm (11.8 in) in 2002.

Download the Data

Data for Alvin standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alvin 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 2026-10-17 (17 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).