Alto 5 SW Weather Records (USC00410190)

Record envelope, standing records and threshold days for Alto 5 SW (USC00410190), Texas, United States, with 68 years of record.

Key Facts for Alto 5 SW

Alto 5 SW (USC00410190) is a weather station in Texas, United States at 31.61 latitude and -95.13 longitude, 85 m (280 ft) above sea level.
The station reports from 1941 to 2008, 68 years of record.
124 records set at Alto 5 SW still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alto 5 SW set a daily record precipitation of 24.9 mm (1.0 in) on 11 March 2008.

About the Station

Location: Texas, United States, 31.61 latitude, -95.13 longitude.
Elevation: 85 m (280 ft).
Period of record: 1941 to 2008, 68 years.
Eligible elements: 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 Alto 5 SW. 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 Alto 5 SW, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	n/a	n/a	n/a	n/a
Feb	n/a	n/a	n/a	n/a
Mar	n/a	n/a	n/a	n/a
Apr	n/a	n/a	n/a	n/a
May	n/a	n/a	n/a	n/a
Jun	n/a	n/a	n/a	n/a
Jul	n/a	n/a	n/a	n/a
Aug	38.9 C (102.0 F)	15.6 C (60.1 F)	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	n/a	n/a	n/a	n/a
Nov	n/a	n/a	n/a	n/a
Dec	n/a	n/a	n/a	n/a

Which Years Hold Standing Records

124 standing records

124 records at Alto 5 SW still stand. 1945 holds the most, with 124.

Wettest Day of Each Month

Oct: 175.5 mm (6.9 in)

The wettest day on record for each calendar month at Alto 5 SW. The most was 175.5 mm (6.9 in) on 14 October 1957.

Record daily precipitation for each month at Alto 5 SW
Month	Record daily precipitation (mm)	Date
Jan	131.6 mm (5.2 in)	29 January 1999
Feb	96.3 mm (3.8 in)	1 February 1975
Mar	136.7 mm (5.4 in)	29 March 1989
Apr	127.5 mm (5.0 in)	24 April 1957
May	118.9 mm (4.7 in)	20 May 1947
Jun	160.3 mm (6.3 in)	8 June 2001
Jul	111.8 mm (4.4 in)	25 July 1996
Aug	100.6 mm (4.0 in)	12 August 1966
Sep	110.5 mm (4.4 in)	15 September 1949
Oct	175.5 mm (6.9 in)	14 October 1957
Nov	129.0 mm (5.1 in)	21 November 1960
Dec	116.1 mm (4.6 in)	15 December 1992

Period of Record Coverage

1945 to 1945

1 years of record at Alto 5 SW, 1945 to 1945. 1 years have data for under 90 percent of days and are left out of rankings: 1945.

Latest Records

Latest records at Alto 5 SW
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 March 2008	Alto 5 SW, US	daily rain	24.9 mm (1.0 in)	3.6 mm (0.14 in)	40 years	20 of 100 (Routine)
8 March 2008	Alto 5 SW, US	monthly snowfall	2.0 cm (0.8 in)	1.7 cm (0.7 in)	43 years	20 of 100 (Routine)
17 February 2008	Alto 5 SW, US	daily rain	32.5 mm (1.3 in)	14.0 mm (0.6 in)	42 years	27 of 100 (Routine)
23 October 2007	Alto 5 SW, US	daily rain	26.7 mm (1.1 in)	1.6 mm (0.06 in)	49 years	20 of 100 (Routine)
16 October 2007	Alto 5 SW, US	daily rain	21.1 mm (0.8 in)	2.6 mm (0.10 in)	14 years	11 of 100 (Routine)
15 July 2007	Alto 5 SW, US	daily rain	57.9 mm (2.3 in)	1.5 mm (0.06 in)	32 years	15 of 100 (Routine)
6 July 2007	Alto 5 SW, US	daily rain	101.1 mm (4.0 in)	10.7 mm (0.4 in)	48 years	26 of 100 (Routine)
27 March 2007	Alto 5 SW, US	daily rain	32.0 mm (1.3 in)	2.8 mm (0.11 in)	56 years	23 of 100 (Routine)
14 January 2007	Alto 5 SW, US	daily rain	69.6 mm (2.7 in)	39.4 mm (1.6 in)	17 years	35 of 100 (Notable)
4 January 2007	Alto 5 SW, US	daily rain	33.5 mm (1.3 in)	5.1 mm (0.20 in)	35 years	19 of 100 (Routine)
26 October 2006	Alto 5 SW, US	daily rain	89.7 mm (3.5 in)	22.9 mm (0.9 in)	52 years	31 of 100 (Routine)
11 October 2006	Alto 5 SW, US	daily rain	51.3 mm (2.0 in)	7.6 mm (0.30 in)	28 years	17 of 100 (Routine)
18 September 2006	Alto 5 SW, US	daily rain	72.1 mm (2.8 in)	50.0 mm (2.0 in)	53 years	48 of 100 (Notable)
7 August 2006	Alto 5 SW, US	daily rain	22.4 mm (0.9 in)	4.1 mm (0.16 in)	9 years	10 of 100 (Routine)
27 July 2006	Alto 5 SW, US	daily rain	70.6 mm (2.8 in)	25.6 mm (1.0 in)	27 years	29 of 100 (Routine)
6 May 2006	Alto 5 SW, US	daily rain	33.3 mm (1.3 in)	6.9 mm (0.27 in)	35 years	19 of 100 (Routine)
21 April 2006	Alto 5 SW, US	daily rain	48.3 mm (1.9 in)	15.3 mm (0.6 in)	9 years	15 of 100 (Routine)
20 March 2006	Alto 5 SW, US	daily rain	63.5 mm (2.5 in)	26.9 mm (1.1 in)	27 years	32 of 100 (Routine)
23 January 2006	Alto 5 SW, US	daily rain	104.1 mm (4.1 in)	90.6 mm (3.6 in)	32 years	55 of 100 (Notable)
25 September 2005	Alto 5 SW, US	daily rain	51.3 mm (2.0 in)	8.4 mm (0.33 in)	59 years	27 of 100 (Routine)

Extremes by Year

1941 to 2008

Yearly extremes at Alto 5 SW: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1945	38.9 C (102.0 F)	1
Coldest night (TNn)	15.6 C (60.1 F)	1945	15.6 C (60.1 F)	1
Wettest day (Rx1day)	175.5 mm (6.9 in)	1957	84.4 mm (3.3 in)	68
Wettest five days (Rx5day)	353.3 mm (13.9 in)	2001	136.7 mm (5.4 in)	68
Longest dry spell (CDD)	65 days	2000	26 days	68

Hottest day (TXx)

The hottest day of the year at Alto 5 SW, 1941 to 2008. The record is 38.9 C (102.0 F) in 1945, marked on the chart; the median year is 38.9 C (102.0 F).

Hottest day (TXx) at Alto 5 SW by year
Year	Hottest day (TXx)
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	38.9 C (102.0 F)
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	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a

Coldest night (TNn)

The coldest night of the year at Alto 5 SW, 1941 to 2008. The record is 15.6 C (60.1 F) in 1945, marked on the chart; the median year is 15.6 C (60.1 F).

Coldest night (TNn) at Alto 5 SW by year
Year	Coldest night (TNn)
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	15.6 C (60.1 F)
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	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a

Wettest day (Rx1day)

The wettest day of the year at Alto 5 SW, 1941 to 2008. The record is 175.5 mm (6.9 in) in 1957, marked on the chart; the median year is 84.4 mm (3.3 in).

Wettest day (Rx1day) at Alto 5 SW by year
Year	Wettest day (Rx1day)
1941	109.2 mm (4.3 in)
1942	77.2 mm (3.0 in)
1943	58.7 mm (2.3 in)
1944	111.3 mm (4.4 in)
1945	106.7 mm (4.2 in)
1946	92.7 mm (3.6 in)
1947	118.9 mm (4.7 in)
1948	65.0 mm (2.6 in)
1949	110.5 mm (4.4 in)
1950	87.4 mm (3.4 in)
1951	49.8 mm (2.0 in)
1952	59.7 mm (2.4 in)
1953	99.1 mm (3.9 in)
1954	40.6 mm (1.6 in)
1955	66.0 mm (2.6 in)
1956	67.3 mm (2.6 in)
1957	175.5 mm (6.9 in)
1958	114.8 mm (4.5 in)
1959	58.4 mm (2.3 in)
1960	129.0 mm (5.1 in)
1961	76.7 mm (3.0 in)
1962	103.1 mm (4.1 in)
1963	41.7 mm (1.6 in)
1964	62.7 mm (2.5 in)
1965	84.1 mm (3.3 in)
1966	100.6 mm (4.0 in)
1967	71.1 mm (2.8 in)
1968	81.3 mm (3.2 in)
1969	54.6 mm (2.1 in)
1970	47.8 mm (1.9 in)
1971	68.6 mm (2.7 in)
1972	84.6 mm (3.3 in)
1973	87.6 mm (3.4 in)
1974	77.5 mm (3.1 in)
1975	96.3 mm (3.8 in)
1976	78.5 mm (3.1 in)
1977	63.2 mm (2.5 in)
1978	59.7 mm (2.4 in)
1979	102.9 mm (4.1 in)
1980	80.8 mm (3.2 in)
1981	89.4 mm (3.5 in)
1982	78.0 mm (3.1 in)
1983	56.6 mm (2.2 in)
1984	101.1 mm (4.0 in)
1985	113.8 mm (4.5 in)
1986	73.9 mm (2.9 in)
1987	48.3 mm (1.9 in)
1988	77.7 mm (3.1 in)
1989	136.7 mm (5.4 in)
1990	126.5 mm (5.0 in)
1991	88.9 mm (3.5 in)
1992	116.1 mm (4.6 in)
1993	76.2 mm (3.0 in)
1994	138.7 mm (5.5 in)
1995	62.2 mm (2.4 in)
1996	111.8 mm (4.4 in)
1997	86.4 mm (3.4 in)
1998	62.5 mm (2.5 in)
1999	131.6 mm (5.2 in)
2000	111.3 mm (4.4 in)
2001	160.3 mm (6.3 in)
2002	88.9 mm (3.5 in)
2003	94.7 mm (3.7 in)
2004	84.3 mm (3.3 in)
2005	52.1 mm (2.1 in)
2006	104.1 mm (4.1 in)
2007	101.1 mm (4.0 in)
2008	34.0 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Alto 5 SW, 1941 to 2008. The record is 353.3 mm (13.9 in) in 2001, marked on the chart; the median year is 136.7 mm (5.4 in).

Wettest five days (Rx5day) at Alto 5 SW by year
Year	Wettest five days (Rx5day)
1941	160.0 mm (6.3 in)
1942	154.9 mm (6.1 in)
1943	113.8 mm (4.5 in)
1944	236.3 mm (9.3 in)
1945	130.9 mm (5.2 in)
1946	163.4 mm (6.4 in)
1947	75.4 mm (3.0 in)
1948	69.3 mm (2.7 in)
1949	137.4 mm (5.4 in)
1950	131.6 mm (5.2 in)
1951	70.1 mm (2.8 in)
1952	73.2 mm (2.9 in)
1953	167.3 mm (6.6 in)
1954	80.0 mm (3.1 in)
1955	105.6 mm (4.2 in)
1956	106.4 mm (4.2 in)
1957	315.0 mm (12.4 in)
1958	158.2 mm (6.2 in)
1959	83.0 mm (3.3 in)
1960	171.4 mm (6.7 in)
1961	135.9 mm (5.4 in)
1962	184.9 mm (7.3 in)
1963	51.1 mm (2.0 in)
1964	81.5 mm (3.2 in)
1965	104.1 mm (4.1 in)
1966	141.0 mm (5.6 in)
1967	122.9 mm (4.8 in)
1968	173.2 mm (6.8 in)
1969	141.7 mm (5.6 in)
1970	70.1 mm (2.8 in)
1971	110.8 mm (4.4 in)
1972	115.6 mm (4.6 in)
1973	155.2 mm (6.1 in)
1974	139.7 mm (5.5 in)
1975	147.7 mm (5.8 in)
1976	91.5 mm (3.6 in)
1977	104.4 mm (4.1 in)
1978	101.4 mm (4.0 in)
1979	163.0 mm (6.4 in)
1980	148.1 mm (5.8 in)
1981	165.9 mm (6.5 in)
1982	114.3 mm (4.5 in)
1983	128.4 mm (5.1 in)
1984	259.2 mm (10.2 in)
1985	207.8 mm (8.2 in)
1986	85.9 mm (3.4 in)
1987	68.4 mm (2.7 in)
1988	128.3 mm (5.1 in)
1989	151.2 mm (6.0 in)
1990	172.2 mm (6.8 in)
1991	227.3 mm (8.9 in)
1992	127.6 mm (5.0 in)
1993	201.2 mm (7.9 in)
1994	189.1 mm (7.4 in)
1995	144.1 mm (5.7 in)
1996	127.3 mm (5.0 in)
1997	106.0 mm (4.2 in)
1998	141.7 mm (5.6 in)
1999	205.0 mm (8.1 in)
2000	213.4 mm (8.4 in)
2001	353.3 mm (13.9 in)
2002	134.6 mm (5.3 in)
2003	145.3 mm (5.7 in)
2004	145.5 mm (5.7 in)
2005	63.8 mm (2.5 in)
2006	107.9 mm (4.2 in)
2007	147.6 mm (5.8 in)
2008	86.8 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Alto 5 SW, 1941 to 2008. The record is 65 days in 2000, marked on the chart; the median year is 26 days.

Longest dry spell (CDD) at Alto 5 SW by year
Year	Longest dry spell (CDD)
1941	13 days
1942	25 days
1943	19 days
1944	28 days
1945	21 days
1946	19 days
1947	38 days
1948	26 days
1949	21 days
1950	21 days
1951	25 days
1952	47 days
1953	51 days
1954	58 days
1955	28 days
1956	46 days
1957	27 days
1958	29 days
1959	21 days
1960	18 days
1961	23 days
1962	28 days
1963	13 days
1964	27 days
1965	27 days
1966	22 days
1967	27 days
1968	23 days
1969	33 days
1970	30 days
1971	29 days
1972	27 days
1973	14 days
1974	21 days
1975	30 days
1976	21 days
1977	28 days
1978	45 days
1979	30 days
1980	31 days
1981	20 days
1982	20 days
1983	21 days
1984	22 days
1985	21 days
1986	25 days
1987	37 days
1988	25 days
1989	31 days
1990	21 days
1991	18 days
1992	22 days
1993	32 days
1994	26 days
1995	27 days
1996	38 days
1997	16 days
1998	38 days
1999	42 days
2000	65 days
2001	27 days
2002	19 days
2003	16 days
2004	24 days
2005	31 days
2006	22 days
2007	25 days
2008	16 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.

Rainfall Return Levels

59 years, 1944 to 2007

A day with at least 84.4 mm (3.3 in) of rain is expected about once in 2 years. A day with at least 174.0 mm (6.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Alto 5 SW: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	84.4 mm (3.3 in)
5 years	110.4 mm (4.3 in)
10 years	126.8 mm (5.0 in)
25 years	146.6 mm (5.8 in)
50 years	160.6 mm (6.3 in)
100 years	174.0 mm (6.9 in)	Longer than the 59 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, 59 years of values from 1944 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: 175.5 mm (6.9 in) in 1957; 160.3 mm (6.3 in) in 2001; 138.7 mm (5.5 in) in 1994.

Download the Data

Data for Alto 5 SW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alto 5 SW 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).