Roby Weather Records (USC00417678)

Record envelope, standing records and threshold days for Roby (USC00417678), Texas, United States, with 83 years of record.

Key Facts for Roby

Roby (USC00417678) is a weather station in Texas, United States at 32.73 latitude and -100.38 longitude, 604 m (1,982 ft) above sea level.
The station reports from 1893 to 1975, 83 years of record.
1,464 records set at Roby still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Roby set a daily record precipitation of 16.8 mm (0.7 in) on 2 February 1975.

About the Station

Location: Texas, United States, 32.73 latitude, -100.38 longitude.
Elevation: 604 m (1,982 ft).
Period of record: 1893 to 1975, 83 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 Roby. 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 Roby, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	31.1 C (88.0 F)	-19.4 C (-2.9 F)	n/a	n/a
Feb	34.4 C (93.9 F)	-22.2 C (-8.0 F)	n/a	n/a
Mar	34.4 C (93.9 F)	-11.1 C (12.0 F)	n/a	n/a
Apr	37.8 C (100.0 F)	-7.8 C (18.0 F)	n/a	n/a
May	42.8 C (109.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jun	43.9 C (111.0 F)	4.4 C (39.9 F)	n/a	n/a
Jul	43.9 C (111.0 F)	4.4 C (39.9 F)	n/a	n/a
Aug	42.8 C (109.0 F)	7.2 C (45.0 F)	n/a	n/a
Sep	41.1 C (106.0 F)	1.1 C (34.0 F)	n/a	n/a
Oct	37.2 C (99.0 F)	-7.8 C (18.0 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-13.3 C (8.1 F)	n/a	n/a
Dec	28.9 C (84.0 F)	-16.7 C (1.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Roby still stand. 1895 holds the most, with 113.

Standing records at Roby by the year they were set
Year set	Standing records
1893	59
1894	86
1895	113
1896	54
1897	42
1898	52
1904	58
1905	53
1906	79
1907	49
1908	50
1909	63
1910	55
1911	113
1912	49
1913	38
1914	85
1915	44
1916	53
1917	59
1918	82
1919	35
1920	36
1921	40
1922	8
1923	8
1924	1

All-Time Record Progression

1 new records

1 all-time records were set at Roby between 5 August 1974 and 5 August 1974. Each dot is a new record.

Wettest Day of Each Month

Aug: 152.4 mm (6.0 in)

The wettest day on record for each calendar month at Roby. The most was 152.4 mm (6.0 in) on 5 August 1974.

Record daily precipitation for each month at Roby
Month	Record daily precipitation (mm)	Date
Jan	41.9 mm (1.6 in)	24 January 1961
Feb	100.8 mm (4.0 in)	7 February 1957
Mar	59.7 mm (2.4 in)	10 March 1973
Apr	63.5 mm (2.5 in)	29 April 1895
May	83.8 mm (3.3 in)	17 May 1918
Jun	144.8 mm (5.7 in)	1 June 1894
Jul	142.2 mm (5.6 in)	13 July 1895
Aug	152.4 mm (6.0 in)	5 August 1974
Sep	125.2 mm (4.9 in)	10 September 1969
Oct	88.9 mm (3.5 in)	15 October 1941
Nov	55.1 mm (2.2 in)	28 November 1909
Dec	121.9 mm (4.8 in)	24 December 1932

Period of Record Coverage

1893 to 1924

27 years of record at Roby, 1893 to 1924. 11 years have data for under 90 percent of days and are left out of rankings: 1893, 1895, 1896, 1897, 1898, 1906, 1907, 1920 and others.

Days with data per year at Roby
Year	Days with data	Share of year	Complete
1893	283	78%	No
1894	350	96%	Yes
1895	327	90%	No
1896	262	72%	No
1897	231	63%	No
1898	192	53%	No
1904	333	91%	Yes
1905	334	92%	Yes
1906	297	81%	No
1907	320	88%	No
1908	331	90%	Yes
1909	360	99%	Yes
1910	332	91%	Yes
1911	355	97%	Yes
1912	363	99%	Yes
1913	345	95%	Yes
1914	359	98%	Yes
1915	364	100%	Yes
1916	334	91%	Yes
1917	363	99%	Yes
1918	363	99%	Yes
1919	360	99%	Yes
1920	301	82%	No
1921	352	96%	Yes
1922	119	33%	No
1923	122	33%	No
1924	28	8%	No

Latest Records

Latest records at Roby
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
2 February 1975	Roby, US	daily rain	16.8 mm (0.7 in)	16.0 mm (0.6 in)	56 years	20 of 100 (Routine)
12 January 1975	Roby, US	daily snowfall	7.6 cm (3.0 in)	7.6 cm (3.0 in)	81 years	43 of 100 (Notable)
12 January 1975	Roby, US	daily rain	7.6 mm (0.30 in)	3.5 mm (0.14 in)	60 years	20 of 100 (Routine)
31 December 1974	Roby, US	daily rain	14.7 mm (0.6 in)	4.0 mm (0.16 in)	56 years	20 of 100 (Routine)
16 September 1974	Roby, US	daily rain	46.5 mm (1.8 in)	14.5 mm (0.6 in)	8 years	17 of 100 (Routine)
5 August 1974	Roby, US	all-time rain	152.4 mm (6.0 in)	7.6 mm (0.30 in)	80 years	55 of 100 (Notable)
21 April 1974	Roby, US	daily rain	50.8 mm (2.0 in)	41.4 mm (1.6 in)	78 years	63 of 100 (Major)
24 November 1973	Roby, US	daily rain	43.2 mm (1.7 in)	17.0 mm (0.7 in)	20 years	30 of 100 (Routine)
23 March 1973	Roby, US	daily rain	17.8 mm (0.7 in)	9.2 mm (0.36 in)	54 years	20 of 100 (Routine)
10 March 1973	Roby, US	monthly rain	59.7 mm (2.4 in)	5.1 mm (0.20 in)	67 years	43 of 100 (Notable)
8 February 1973	Roby, US	daily rain	22.6 mm (0.9 in)	16.2 mm (0.6 in)	60 years	20 of 100 (Routine)
8 February 1973	Roby, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	60 years	31 of 100 (Routine)
25 January 1973	Roby, US	daily rain	20.6 mm (0.8 in)	19.3 mm (0.8 in)	49 years	20 of 100 (Routine)
11 January 1973	Roby, US	daily snowfall	15.2 cm (6.0 in)	13.9 cm (5.5 in)	55 years	45 of 100 (Notable)
10 January 1973	Roby, US	daily rain	22.9 mm (0.9 in)	3.3 mm (0.13 in)	53 years	20 of 100 (Routine)
21 October 1972	Roby, US	daily rain	55.1 mm (2.2 in)	11.7 mm (0.5 in)	58 years	32 of 100 (Routine)
21 September 1972	Roby, US	daily rain	24.4 mm (1.0 in)	14.7 mm (0.6 in)	57 years	20 of 100 (Routine)
1 September 1972	Roby, US	daily rain	54.4 mm (2.1 in)	3.6 mm (0.14 in)	64 years	28 of 100 (Routine)
13 August 1972	Roby, US	daily rain	89.9 mm (3.5 in)	59.4 mm (2.3 in)	58 years	54 of 100 (Notable)
28 June 1972	Roby, US	daily rain	22.4 mm (0.9 in)	6.4 mm (0.25 in)	24 years	18 of 100 (Routine)

Climate Trend

10 complete years, 1894 to 1921

One stripe for each of 10 complete years at Roby, 1894 to 1921. Blue stripes are years cooler than the station's own mean of 17.5 C (63.4 F); red stripes are warmer. The coolest year was 1914, at 16.0 C (60.7 F), and the warmest was 1911, at 18.6 C (65.5 F). The strongest colour marks a difference of 1.5 C (2.7 F).

Annual mean temperature at Roby as warming stripes, 1894 to 1921
Year	Annual mean temperature	Difference from the station mean
1894	16.7 C	-0.72 C
1909	17.6 C	+0.16 C
1911	18.6 C	+1.16 C
1913	17.3 C	-0.11 C
1914	16.0 C	-1.49 C
1915	17.2 C	-0.30 C
1917	18.0 C	+0.54 C
1918	18.3 C	+0.80 C
1919	16.7 C	-0.71 C
1921	18.2 C	+0.71 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

1893 to 1975

Yearly extremes at Roby: 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)	1893	40.6 C (105.1 F)	27
Coldest night (TNn)	-22.2 C (-8.0 F)	1895	-13.3 C (8.1 F)	27
Wettest day (Rx1day)	152.4 mm (6.0 in)	1974	57.2 mm (2.3 in)	69
Wettest five days (Rx5day)	290.0 mm (11.4 in)	1895	89.2 mm (3.5 in)	69
Longest dry spell (CDD)	151 days	1921	47 days	69

Hottest day (TXx)

The hottest day of the year at Roby, 1893 to 1975. The record is 43.9 C (111.0 F) in 1893, marked on the chart; the median year is 40.6 C (105.1 F).

Hottest day (TXx) at Roby by year
Year	Hottest day (TXx)
1893	43.9 C (111.0 F)
1894	43.3 C (109.9 F)
1895	42.2 C (108.0 F)
1896	43.9 C (111.0 F)
1897	40.0 C (104.0 F)
1898	38.9 C (102.0 F)
1904	39.4 C (102.9 F)
1905	38.9 C (102.0 F)
1906	40.6 C (105.1 F)
1907	43.3 C (109.9 F)
1908	38.9 C (102.0 F)
1909	40.0 C (104.0 F)
1910	43.3 C (109.9 F)
1911	43.3 C (109.9 F)
1912	42.8 C (109.0 F)
1913	40.0 C (104.0 F)
1914	39.4 C (102.9 F)
1915	40.0 C (104.0 F)
1916	41.7 C (107.1 F)
1917	43.3 C (109.9 F)
1918	42.2 C (108.0 F)
1919	40.0 C (104.0 F)
1920	43.9 C (111.0 F)
1921	40.0 C (104.0 F)
1922	40.6 C (105.1 F)
1923	40.0 C (104.0 F)
1924	19.4 C (66.9 F)
1930	n/a
1931	n/a
1932	n/a
1933	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	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

Coldest night (TNn)

The coldest night of the year at Roby, 1893 to 1975. The record is -22.2 C (-8.0 F) in 1895, marked on the chart; the median year is -13.3 C (8.1 F).

Coldest night (TNn) at Roby by year
Year	Coldest night (TNn)
1893	-13.3 C (8.1 F)
1894	-15.0 C (5.0 F)
1895	-22.2 C (-8.0 F)
1896	-11.1 C (12.0 F)
1897	-16.7 C (1.9 F)
1898	-10.0 C (14.0 F)
1904	-9.4 C (15.1 F)
1905	-19.4 C (-2.9 F)
1906	-11.1 C (12.0 F)
1907	-11.1 C (12.0 F)
1908	-14.4 C (6.1 F)
1909	-16.7 C (1.9 F)
1910	-12.2 C (10.0 F)
1911	-17.2 C (1.0 F)
1912	-16.1 C (3.0 F)
1913	-14.4 C (6.1 F)
1914	-12.8 C (9.0 F)
1915	-11.1 C (12.0 F)
1916	-13.3 C (8.1 F)
1917	-13.3 C (8.1 F)
1918	-17.8 C (0.0 F)
1919	-13.9 C (7.0 F)
1920	-12.2 C (10.0 F)
1921	-10.0 C (14.0 F)
1922	10.0 C (50.0 F)
1923	5.0 C (41.0 F)
1924	-7.2 C (19.0 F)
1930	n/a
1931	n/a
1932	n/a
1933	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	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

Wettest day (Rx1day)

The wettest day of the year at Roby, 1893 to 1975. The record is 152.4 mm (6.0 in) in 1974, marked on the chart; the median year is 57.2 mm (2.3 in).

Wettest day (Rx1day) at Roby by year
Year	Wettest day (Rx1day)
1893	50.8 mm (2.0 in)
1894	144.8 mm (5.7 in)
1895	142.2 mm (5.6 in)
1896	39.6 mm (1.6 in)
1897	54.9 mm (2.2 in)
1898	49.0 mm (1.9 in)
1904	101.6 mm (4.0 in)
1905	61.2 mm (2.4 in)
1906	73.7 mm (2.9 in)
1907	116.8 mm (4.6 in)
1908	82.0 mm (3.2 in)
1909	55.1 mm (2.2 in)
1910	43.2 mm (1.7 in)
1911	83.8 mm (3.3 in)
1912	34.8 mm (1.4 in)
1913	52.1 mm (2.1 in)
1914	69.1 mm (2.7 in)
1915	74.9 mm (2.9 in)
1916	48.8 mm (1.9 in)
1917	27.7 mm (1.1 in)
1918	83.8 mm (3.3 in)
1919	58.9 mm (2.3 in)
1920	129.5 mm (5.1 in)
1921	66.0 mm (2.6 in)
1922	76.5 mm (3.0 in)
1923	40.4 mm (1.6 in)
1924	1.5 mm (0.06 in)
1930	53.6 mm (2.1 in)
1931	43.2 mm (1.7 in)
1932	121.9 mm (4.8 in)
1933	55.6 mm (2.2 in)
1938	35.1 mm (1.4 in)
1939	74.9 mm (2.9 in)
1940	114.3 mm (4.5 in)
1941	88.9 mm (3.5 in)
1942	80.0 mm (3.1 in)
1943	42.7 mm (1.7 in)
1944	40.9 mm (1.6 in)
1945	61.5 mm (2.4 in)
1946	78.7 mm (3.1 in)
1947	55.9 mm (2.2 in)
1948	62.2 mm (2.4 in)
1949	50.8 mm (2.0 in)
1950	70.1 mm (2.8 in)
1951	29.7 mm (1.2 in)
1952	40.1 mm (1.6 in)
1953	33.0 mm (1.3 in)
1954	56.4 mm (2.2 in)
1955	54.6 mm (2.1 in)
1956	24.9 mm (1.0 in)
1957	100.8 mm (4.0 in)
1958	70.1 mm (2.8 in)
1959	49.0 mm (1.9 in)
1960	57.2 mm (2.3 in)
1961	88.9 mm (3.5 in)
1962	71.6 mm (2.8 in)
1963	33.0 mm (1.3 in)
1964	31.8 mm (1.3 in)
1965	83.3 mm (3.3 in)
1966	59.2 mm (2.3 in)
1967	48.5 mm (1.9 in)
1968	35.8 mm (1.4 in)
1969	125.2 mm (4.9 in)
1970	47.0 mm (1.9 in)
1971	55.9 mm (2.2 in)
1972	89.9 mm (3.5 in)
1973	59.7 mm (2.4 in)
1974	152.4 mm (6.0 in)
1975	45.7 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Roby, 1893 to 1975. The record is 290.0 mm (11.4 in) in 1895, marked on the chart; the median year is 89.2 mm (3.5 in).

Wettest five days (Rx5day) at Roby by year
Year	Wettest five days (Rx5day)
1893	34.4 mm (1.4 in)
1894	185.9 mm (7.3 in)
1895	290.0 mm (11.4 in)
1896	4.8 mm (0.19 in)
1897	94.5 mm (3.7 in)
1898	113.5 mm (4.5 in)
1904	121.2 mm (4.8 in)
1905	77.7 mm (3.1 in)
1906	143.6 mm (5.7 in)
1907	132.1 mm (5.2 in)
1908	88.9 mm (3.5 in)
1909	78.8 mm (3.1 in)
1910	50.1 mm (2.0 in)
1911	120.9 mm (4.8 in)
1912	45.2 mm (1.8 in)
1913	68.8 mm (2.7 in)
1914	111.0 mm (4.4 in)
1915	90.2 mm (3.6 in)
1916	96.0 mm (3.8 in)
1917	27.7 mm (1.1 in)
1918	83.8 mm (3.3 in)
1919	83.4 mm (3.3 in)
1920	211.1 mm (8.3 in)
1921	108.2 mm (4.3 in)
1922	152.4 mm (6.0 in)
1923	55.6 mm (2.2 in)
1924	2.8 mm (0.11 in)
1930	74.5 mm (2.9 in)
1931	89.2 mm (3.5 in)
1932	148.1 mm (5.8 in)
1933	95.2 mm (3.7 in)
1938	69.2 mm (2.7 in)
1939	100.3 mm (3.9 in)
1940	141.7 mm (5.6 in)
1941	97.5 mm (3.8 in)
1942	80.0 mm (3.1 in)
1943	52.9 mm (2.1 in)
1944	60.2 mm (2.4 in)
1945	92.2 mm (3.6 in)
1946	96.5 mm (3.8 in)
1947	86.7 mm (3.4 in)
1948	66.0 mm (2.6 in)
1949	92.0 mm (3.6 in)
1950	107.4 mm (4.2 in)
1951	47.7 mm (1.9 in)
1952	40.1 mm (1.6 in)
1953	88.5 mm (3.5 in)
1954	69.9 mm (2.8 in)
1955	59.7 mm (2.4 in)
1956	39.4 mm (1.6 in)
1957	111.7 mm (4.4 in)
1958	70.1 mm (2.8 in)
1959	98.8 mm (3.9 in)
1960	65.1 mm (2.6 in)
1961	118.1 mm (4.6 in)
1962	149.8 mm (5.9 in)
1963	48.8 mm (1.9 in)
1964	42.7 mm (1.7 in)
1965	108.2 mm (4.3 in)
1966	93.7 mm (3.7 in)
1967	65.0 mm (2.6 in)
1968	83.3 mm (3.3 in)
1969	184.8 mm (7.3 in)
1970	72.4 mm (2.9 in)
1971	100.0 mm (3.9 in)
1972	103.4 mm (4.1 in)
1973	93.2 mm (3.7 in)
1974	158.5 mm (6.2 in)
1975	46.4 mm (1.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at Roby, 1893 to 1975. The record is 151 days in 1921, marked on the chart; the median year is 47 days.

Longest dry spell (CDD) at Roby by year
Year	Longest dry spell (CDD)
1893	32 days
1894	30 days
1895	24 days
1896	27 days
1897	32 days
1898	46 days
1904	71 days
1905	35 days
1906	26 days
1907	59 days
1908	63 days
1909	70 days
1910	54 days
1911	74 days
1912	42 days
1913	24 days
1914	30 days
1915	48 days
1916	62 days
1917	101 days
1918	41 days
1919	33 days
1920	52 days
1921	151 days
1922	44 days
1923	31 days
1924	24 days
1930	48 days
1931	25 days
1932	55 days
1933	56 days
1938	47 days
1939	65 days
1940	47 days
1941	47 days
1942	55 days
1943	87 days
1944	41 days
1945	32 days
1946	60 days
1947	47 days
1948	41 days
1949	66 days
1950	96 days
1951	61 days
1952	43 days
1953	57 days
1954	53 days
1955	87 days
1956	71 days
1957	38 days
1958	47 days
1959	35 days
1960	49 days
1961	25 days
1962	41 days
1963	50 days
1964	34 days
1965	42 days
1966	40 days
1967	78 days
1968	18 days
1969	36 days
1970	73 days
1971	53 days
1972	47 days
1973	42 days
1974	28 days
1975	59 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

47 years, 1904 to 1973

A day with at least 60.4 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 146.4 mm (5.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Roby: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	60.4 mm (2.4 in)
5 years	84.5 mm (3.3 in)
10 years	100.1 mm (3.9 in)
25 years	119.2 mm (4.7 in)
50 years	133.0 mm (5.2 in)	Longer than the 47 years of record
100 years	146.4 mm (5.8 in)	Longer than the 47 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, 47 years of values from 1904 to 1973.

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: 129.5 mm (5.1 in) in 1920; 125.2 mm (4.9 in) in 1969; 116.8 mm (4.6 in) in 1907.

Download the Data

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