Rockwall Weather Records (USC00417707)

Record envelope, standing records and threshold days for Rockwall (USC00417707), Texas, United States, with 69 years of record.

Key Facts for Rockwall

Rockwall (USC00417707) is a weather station in Texas, United States at 32.93 latitude and -96.46 longitude, 166 m (543 ft) above sea level.
The station reports from 1941 to 2009, 69 years of record.
2 records set at Rockwall still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rockwall set a daily record precipitation of 34.0 mm (1.3 in) on 20 November 2009.

About the Station

Location: Texas, United States, 32.93 latitude, -96.46 longitude.
Elevation: 166 m (543 ft).
Period of record: 1941 to 2009, 69 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 Rockwall. 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 Rockwall, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	-16.7 C (1.9 F)	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	n/a	n/a	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

2 standing records

2 records at Rockwall still stand. 1979 holds the most, with 2.

All-Time Record Progression

1 new records

1 all-time records were set at Rockwall between 19 October 2002 and 19 October 2002. Each dot is a new record.

Wettest Day of Each Month

Oct: 172.7 mm (6.8 in)

The wettest day on record for each calendar month at Rockwall. The most was 172.7 mm (6.8 in) on 19 October 2002.

Record daily precipitation for each month at Rockwall
Month	Record daily precipitation (mm)	Date
Jan	124.5 mm (4.9 in)	24 January 1949
Feb	115.8 mm (4.6 in)	24 February 1949
Mar	170.2 mm (6.7 in)	20 March 2006
Apr	167.6 mm (6.6 in)	30 April 1966
May	147.8 mm (5.8 in)	17 May 1949
Jun	150.4 mm (5.9 in)	12 June 1945
Jul	113.3 mm (4.5 in)	12 July 1988
Aug	127.0 mm (5.0 in)	23 August 1970
Sep	121.9 mm (4.8 in)	6 September 1967
Oct	172.7 mm (6.8 in)	19 October 2002
Nov	95.8 mm (3.8 in)	3 November 1946
Dec	121.2 mm (4.8 in)	4 December 1998

Period of Record Coverage

1979 to 1979

1 years of record at Rockwall, 1979 to 1979. 1 years have data for under 90 percent of days and are left out of rankings: 1979.

Latest Records

Latest records at Rockwall
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
20 November 2009	Rockwall, US	daily rain	34.0 mm (1.3 in)	2.2 mm (0.09 in)	20 years	13 of 100 (Routine)
10 October 2009	Rockwall, US	daily rain	26.7 mm (1.1 in)	2.8 mm (0.11 in)	3 years	7 of 100 (Routine)
9 October 2009	Rockwall, US	daily rain	51.3 mm (2.0 in)	7.9 mm (0.31 in)	27 years	17 of 100 (Routine)
21 August 2009	Rockwall, US	daily rain	30.5 mm (1.2 in)	16.5 mm (0.6 in)	30 years	24 of 100 (Routine)
1 August 2009	Rockwall, US	daily rain	51.1 mm (2.0 in)	13.0 mm (0.5 in)	14 years	17 of 100 (Routine)
30 July 2009	Rockwall, US	daily rain	30.5 mm (1.2 in)	9.7 mm (0.38 in)	38 years	22 of 100 (Routine)
3 May 2009	Rockwall, US	daily rain	106.7 mm (4.2 in)	43.7 mm (1.7 in)	19 years	31 of 100 (Routine)
17 April 2009	Rockwall, US	daily rain	27.9 mm (1.1 in)	1.7 mm (0.07 in)	39 years	17 of 100 (Routine)
6 January 2009	Rockwall, US	daily rain	34.3 mm (1.4 in)	17.5 mm (0.7 in)	49 years	34 of 100 (Routine)
15 May 2008	Rockwall, US	daily rain	36.1 mm (1.4 in)	5.1 mm (0.20 in)	28 years	16 of 100 (Routine)
19 March 2008	Rockwall, US	daily rain	124.5 mm (4.9 in)	45.3 mm (1.8 in)	64 years	50 of 100 (Notable)
13 December 2007	Rockwall, US	daily rain	68.8 mm (2.7 in)	39.3 mm (1.5 in)	28 years	39 of 100 (Notable)
11 September 2007	Rockwall, US	daily rain	31.2 mm (1.2 in)	14.4 mm (0.6 in)	16 years	18 of 100 (Routine)
10 September 2007	Rockwall, US	daily rain	62.2 mm (2.4 in)	26.6 mm (1.0 in)	40 years	31 of 100 (Routine)
3 July 2007	Rockwall, US	daily rain	90.9 mm (3.6 in)	65.2 mm (2.6 in)	20 years	47 of 100 (Notable)
28 June 2007	Rockwall, US	daily rain	38.4 mm (1.5 in)	13.0 mm (0.5 in)	14 years	17 of 100 (Routine)
27 June 2007	Rockwall, US	daily rain	69.9 mm (2.8 in)	51.9 mm (2.0 in)	2 years	35 of 100 (Notable)
2 June 2007	Rockwall, US	daily rain	36.6 mm (1.4 in)	3.8 mm (0.15 in)	25 years	15 of 100 (Routine)
31 March 2007	Rockwall, US	daily rain	48.8 mm (1.9 in)	12.0 mm (0.5 in)	44 years	25 of 100 (Routine)
21 January 2007	Rockwall, US	daily rain	13.5 mm (0.5 in)	1.8 mm (0.07 in)	33 years	17 of 100 (Routine)

Extremes by Year

1941 to 2009

Yearly extremes at Rockwall: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	-16.7 C (1.9 F)	1979	-16.7 C (1.9 F)	1
Wettest day (Rx1day)	172.7 mm (6.8 in)	2002	88.9 mm (3.5 in)	69
Wettest five days (Rx5day)	303.4 mm (11.9 in)	1946	132.8 mm (5.2 in)	69
Longest dry spell (CDD)	76 days	2000	33 days	69

Hottest day (TXx)

The hottest day of the year at Rockwall, 1941 to 2009. The record is -16.7 C (1.9 F) in 1979, marked on the chart; the median year is -16.7 C (1.9 F).

Hottest day (TXx) at Rockwall by year
Year	Hottest day (TXx)
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	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	-16.7 C (1.9 F)
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
2009	n/a

Wettest day (Rx1day)

The wettest day of the year at Rockwall, 1941 to 2009. The record is 172.7 mm (6.8 in) in 2002, marked on the chart; the median year is 88.9 mm (3.5 in).

Wettest day (Rx1day) at Rockwall by year
Year	Wettest day (Rx1day)
1941	31.2 mm (1.2 in)
1942	119.4 mm (4.7 in)
1943	71.1 mm (2.8 in)
1944	82.3 mm (3.2 in)
1945	150.4 mm (5.9 in)
1946	95.8 mm (3.8 in)
1947	72.4 mm (2.9 in)
1948	71.1 mm (2.8 in)
1949	147.8 mm (5.8 in)
1950	83.8 mm (3.3 in)
1951	82.6 mm (3.3 in)
1952	73.7 mm (2.9 in)
1953	63.0 mm (2.5 in)
1954	130.6 mm (5.1 in)
1955	68.1 mm (2.7 in)
1956	57.2 mm (2.3 in)
1957	144.8 mm (5.7 in)
1958	101.6 mm (4.0 in)
1959	111.0 mm (4.4 in)
1960	77.2 mm (3.0 in)
1961	98.8 mm (3.9 in)
1962	82.3 mm (3.2 in)
1963	76.2 mm (3.0 in)
1964	69.6 mm (2.7 in)
1965	105.2 mm (4.1 in)
1966	167.6 mm (6.6 in)
1967	121.9 mm (4.8 in)
1968	50.3 mm (2.0 in)
1969	114.3 mm (4.5 in)
1970	127.0 mm (5.0 in)
1971	121.7 mm (4.8 in)
1972	50.5 mm (2.0 in)
1973	118.1 mm (4.6 in)
1974	84.3 mm (3.3 in)
1975	57.2 mm (2.3 in)
1976	77.5 mm (3.1 in)
1977	104.1 mm (4.1 in)
1978	73.7 mm (2.9 in)
1979	94.5 mm (3.7 in)
1980	71.6 mm (2.8 in)
1981	96.5 mm (3.8 in)
1982	83.1 mm (3.3 in)
1983	69.6 mm (2.7 in)
1984	68.3 mm (2.7 in)
1985	152.4 mm (6.0 in)
1986	70.6 mm (2.8 in)
1987	66.5 mm (2.6 in)
1988	113.3 mm (4.5 in)
1989	127.3 mm (5.0 in)
1990	81.3 mm (3.2 in)
1991	110.0 mm (4.3 in)
1992	71.9 mm (2.8 in)
1993	92.2 mm (3.6 in)
1994	74.7 mm (2.9 in)
1995	88.9 mm (3.5 in)
1996	95.3 mm (3.8 in)
1997	76.2 mm (3.0 in)
1998	121.2 mm (4.8 in)
1999	96.5 mm (3.8 in)
2000	70.1 mm (2.8 in)
2001	105.2 mm (4.1 in)
2002	172.7 mm (6.8 in)
2003	34.8 mm (1.4 in)
2004	95.5 mm (3.8 in)
2005	57.9 mm (2.3 in)
2006	170.2 mm (6.7 in)
2007	90.9 mm (3.6 in)
2008	124.5 mm (4.9 in)
2009	106.7 mm (4.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Rockwall, 1941 to 2009. The record is 303.4 mm (11.9 in) in 1946, marked on the chart; the median year is 132.8 mm (5.2 in).

Wettest five days (Rx5day) at Rockwall by year
Year	Wettest five days (Rx5day)
1941	27.2 mm (1.1 in)
1942	175.3 mm (6.9 in)
1943	78.7 mm (3.1 in)
1944	96.5 mm (3.8 in)
1945	219.4 mm (8.6 in)
1946	303.4 mm (11.9 in)
1947	141.2 mm (5.6 in)
1948	73.1 mm (2.9 in)
1949	174.3 mm (6.9 in)
1950	121.5 mm (4.8 in)
1951	91.0 mm (3.6 in)
1952	96.6 mm (3.8 in)
1953	87.1 mm (3.4 in)
1954	150.2 mm (5.9 in)
1955	101.9 mm (4.0 in)
1956	140.8 mm (5.5 in)
1957	232.5 mm (9.2 in)
1958	171.5 mm (6.8 in)
1959	171.2 mm (6.7 in)
1960	120.7 mm (4.8 in)
1961	101.7 mm (4.0 in)
1962	139.4 mm (5.5 in)
1963	158.7 mm (6.2 in)
1964	88.9 mm (3.5 in)
1965	142.8 mm (5.6 in)
1966	287.3 mm (11.3 in)
1967	153.4 mm (6.0 in)
1968	74.7 mm (2.9 in)
1969	190.7 mm (7.5 in)
1970	169.4 mm (6.7 in)
1971	207.0 mm (8.1 in)
1972	92.5 mm (3.6 in)
1973	175.5 mm (6.9 in)
1974	168.9 mm (6.6 in)
1975	105.7 mm (4.2 in)
1976	142.0 mm (5.6 in)
1977	144.8 mm (5.7 in)
1978	88.2 mm (3.5 in)
1979	115.4 mm (4.5 in)
1980	133.6 mm (5.3 in)
1981	128.8 mm (5.1 in)
1982	123.5 mm (4.9 in)
1983	98.2 mm (3.9 in)
1984	133.1 mm (5.2 in)
1985	168.9 mm (6.6 in)
1986	132.8 mm (5.2 in)
1987	80.1 mm (3.2 in)
1988	149.9 mm (5.9 in)
1989	141.2 mm (5.6 in)
1990	124.0 mm (4.9 in)
1991	250.8 mm (9.9 in)
1992	83.6 mm (3.3 in)
1993	97.0 mm (3.8 in)
1994	141.5 mm (5.6 in)
1995	113.3 mm (4.5 in)
1996	103.0 mm (4.1 in)
1997	114.3 mm (4.5 in)
1998	144.8 mm (5.7 in)
1999	101.6 mm (4.0 in)
2000	143.5 mm (5.6 in)
2001	131.1 mm (5.2 in)
2002	174.2 mm (6.9 in)
2003	63.5 mm (2.5 in)
2004	110.2 mm (4.3 in)
2005	68.1 mm (2.7 in)
2006	247.2 mm (9.7 in)
2007	139.5 mm (5.5 in)
2008	124.5 mm (4.9 in)
2009	124.8 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Rockwall, 1941 to 2009. The record is 76 days in 2000, marked on the chart; the median year is 33 days.

Longest dry spell (CDD) at Rockwall by year
Year	Longest dry spell (CDD)
1941	13 days
1942	25 days
1943	48 days
1944	44 days
1945	21 days
1946	34 days
1947	46 days
1948	33 days
1949	26 days
1950	45 days
1951	43 days
1952	40 days
1953	57 days
1954	33 days
1955	39 days
1956	44 days
1957	38 days
1958	44 days
1959	24 days
1960	23 days
1961	27 days
1962	27 days
1963	42 days
1964	35 days
1965	26 days
1966	25 days
1967	36 days
1968	17 days
1969	41 days
1970	31 days
1971	28 days
1972	37 days
1973	28 days
1974	42 days
1975	32 days
1976	31 days
1977	40 days
1978	39 days
1979	27 days
1980	66 days
1981	22 days
1982	23 days
1983	29 days
1984	19 days
1985	25 days
1986	35 days
1987	35 days
1988	41 days
1989	37 days
1990	22 days
1991	33 days
1992	18 days
1993	39 days
1994	14 days
1995	40 days
1996	34 days
1997	18 days
1998	36 days
1999	56 days
2000	76 days
2001	40 days
2002	29 days
2003	28 days
2004	21 days
2005	31 days
2006	32 days
2007	31 days
2008	27 days
2009	27 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

66 years, 1942 to 2009

A day with at least 89.6 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 193.5 mm (7.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Rockwall: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	89.6 mm (3.5 in)
5 years	117.4 mm (4.6 in)
10 years	135.8 mm (5.3 in)
25 years	159.1 mm (6.3 in)
50 years	176.3 mm (6.9 in)
100 years	193.5 mm (7.6 in)	Longer than the 66 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, 66 years of values from 1942 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: 172.7 mm (6.8 in) in 2002; 170.2 mm (6.7 in) in 2006; 167.6 mm (6.6 in) in 1966.

Download the Data

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