Weather Records on 31 July 1978

754 weather records were set or tied worldwide on 31 July 1978. Highest significance: Dalton Post Office, AU.

Key Facts for 31 July 1978

On 31 July 1978, 754 weather records were set or tied at long-record stations worldwide.
168 were record highs and 339 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 19 monthly and 734 daily.
Dalton Post Office set a daily record precipitation of 51.8 mm (2.0 in) on 31 July 1978.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 469 records.

Record Map

754 stations

754 station records on 31 July 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Dalton Post Office	Australia	Record daily precipitation	51.8 mm (2.0 in)	65 of 100 (Major)
Oxford	United Kingdom	Record daily precipitation	29.9 mm (1.2 in)	62 of 100 (Major)
Port Isabel	United States	Record daily precipitation	130.8 mm (5.1 in)	58 of 100 (Notable)
Little Hickman Lock 8	United States	Record daily precipitation	112.8 mm (4.4 in)	53 of 100 (Notable)
Lumpkin 2 SE	United States	Record daily precipitation	102.6 mm (4.0 in)	51 of 100 (Notable)
Abbeville	France	Record daily precipitation	35.1 mm (1.4 in)	49 of 100 (Notable)
Arteaga (Smn)	Mexico	Record daily precipitation	46.0 mm (1.8 in)	47 of 100 (Notable)
College Hill Lock 11	United States	Record daily precipitation	115.1 mm (4.5 in)	47 of 100 (Notable)
Brest-Guipavas	France	Record daily precipitation	34.5 mm (1.4 in)	46 of 100 (Notable)
Ploumanac'h	France	Record daily precipitation	26.0 mm (1.0 in)	44 of 100 (Notable)
Feldberg/Schwarzwald	Germany	Record daily precipitation	82.2 mm (3.2 in)	44 of 100 (Notable)
Rothamsted	United Kingdom	Record daily precipitation	32.4 mm (1.3 in)	44 of 100 (Notable)
Stereguscij	Ukraine	Record daily precipitation	34.9 mm (1.4 in)	44 of 100 (Notable)
Springfield	United States	Record daily precipitation	33.0 mm (1.3 in)	44 of 100 (Notable)
Springfield 2W	United States	Record daily precipitation	88.1 mm (3.5 in)	44 of 100 (Notable)
Keene 1 WSW	United States	Record daily precipitation	88.1 mm (3.5 in)	43 of 100 (Notable)
Fischers Store	United States	Record daily precipitation	86.4 mm (3.4 in)	43 of 100 (Notable)
Danville	United States	Record daily precipitation	70.9 mm (2.8 in)	42 of 100 (Notable)
High Brg Lock 7	United States	Record daily precipitation	92.7 mm (3.6 in)	42 of 100 (Notable)
Fords Ferry Dam 5O	United States	Record daily precipitation	61.0 mm (2.4 in)	41 of 100 (Notable)
Corpus Christi NAS	United States	Record daily precipitation	62.7 mm (2.5 in)	41 of 100 (Notable)
Cardenas (Smn)	Mexico	Record daily precipitation	41.9 mm (1.6 in)	40 of 100 (Notable)
Clay	United States	Record daily precipitation	41.1 mm (1.6 in)	40 of 100 (Notable)
Eastbourne	United Kingdom	Record daily precipitation	27.6 mm (1.1 in)	39 of 100 (Notable)
Klepinino	Ukraine	Record daily precipitation	34.5 mm (1.4 in)	39 of 100 (Notable)
Salvisa Lock 6	United States	Record daily precipitation	108.0 mm (4.3 in)	39 of 100 (Notable)
Richmond	Canada	Record low minimum temperature	3.9 C (39.0 F)	38 of 100 (Notable)
Houlton	United States	Record low minimum temperature	4.4 C (39.9 F)	37 of 100 (Notable)
Cheboygan	United States	Record low maximum temperature	15.6 C (60.1 F)	37 of 100 (Notable)
Port Lavaca 2	United States	Record daily precipitation	42.4 mm (1.7 in)	37 of 100 (Notable)
Freiburg	Germany	Record daily precipitation	36.1 mm (1.4 in)	36 of 100 (Notable)
Mc Connellsville Lk 7	United States	Record low maximum temperature	22.2 C (72.0 F)	35 of 100 (Notable)
Philippi	United States	Record daily precipitation	35.6 mm (1.4 in)	35 of 100 (Notable)
Halmstad	Sweden	Record high maximum temperature	29.8 C (85.6 F)	34 of 100 (Routine)
Odesa	Ukraine	Record daily precipitation	30.4 mm (1.2 in)	34 of 100 (Routine)
Ellis	United States	Record daily precipitation	43.7 mm (1.7 in)	34 of 100 (Routine)
Elko Rgnl AP	United States	Record high maximum temperature	39.4 C (102.9 F)	34 of 100 (Routine)
Zacatecas (Smn)	Mexico	Record daily precipitation	26.4 mm (1.0 in)	33 of 100 (Routine)
Seymour 1 WSW	United States	Record daily precipitation	30.5 mm (1.2 in)	33 of 100 (Routine)
Ripley	United States	Record high maximum temperature	37.8 C (100.0 F)	33 of 100 (Routine)
Anadarko 3 E	United States	Record daily precipitation	34.8 mm (1.4 in)	33 of 100 (Routine)
Shamrock	United States	Record daily precipitation	39.1 mm (1.5 in)	33 of 100 (Routine)
Uvalde	United States	Record low maximum temperature	30.6 C (87.1 F)	33 of 100 (Routine)
Beauceville	Canada	Record low minimum temperature	2.8 C (37.0 F)	32 of 100 (Routine)
Lampazos (Smn)	Mexico	Record low maximum temperature	26.7 C (80.1 F)	32 of 100 (Routine)
Minusinsk	Russia	Record daily precipitation	46.4 mm (1.8 in)	32 of 100 (Routine)
Chazy	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Port Lavaca 2	United States	Record low maximum temperature	30.0 C (86.0 F)	32 of 100 (Routine)
Vogtsburg-Oberrotweil	Germany	Record daily precipitation	27.8 mm (1.1 in)	31 of 100 (Routine)
Guerrero (Smn)	Mexico	Record high minimum temperature	15.6 C (60.1 F)	31 of 100 (Routine)
Villalba	Mexico	Record daily precipitation	30.0 mm (1.2 in)	31 of 100 (Routine)
Orenburg	Russia	Record low minimum temperature	5.2 C (41.4 F)	31 of 100 (Routine)
Hawarden Bridge	United Kingdom	Record daily precipitation	26.2 mm (1.0 in)	31 of 100 (Routine)
Askaniia Nova	Ukraine	Record low maximum temperature	20.4 C (68.7 F)	31 of 100 (Routine)
Taylorsville 2SW	United States	Record daily precipitation	35.1 mm (1.4 in)	31 of 100 (Routine)
Penn Yan	United States	Record low minimum temperature	4.4 C (39.9 F)	31 of 100 (Routine)
Marietta Lock 1	United States	Record daily precipitation	35.6 mm (1.4 in)	31 of 100 (Routine)
Runge	United States	Record daily precipitation	32.0 mm (1.3 in)	31 of 100 (Routine)
Enosburg Falls	United States	Record low minimum temperature	3.3 C (37.9 F)	31 of 100 (Routine)
Warriup	Australia	Record daily precipitation	25.2 mm (1.0 in)	30 of 100 (Routine)

Counts by Type and Timescale

754 records

Records set or tied on 31 July 1978 by type: Highest daily maximum 75, Lowest daily maximum 181, Highest daily minimum 93, Lowest daily minimum 158, Heaviest daily rainfall 247.

Records on 31 July 1978 by type
Record type	Records
Highest daily maximum	75
Lowest daily maximum	181
Highest daily minimum	93
Lowest daily minimum	158
Heaviest daily rainfall	247
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1978 by timescale: all-time 1, monthly 19, daily 734.

How Much Records Were Beaten By

588 broken records

Margins by which the 588 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 68.6. Ties are not counted.

Top 20 by Significance

31 July 1978

Top 20 records on 31 July 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1978	Dalton Post Office, AU	daily rain	51.8 mm (2.0 in)	36.3 mm (1.4 in)	57 years	65 of 100 (Major)
31 July 1978	Oxford, GB	daily rain	29.9 mm (1.2 in)	14.9 mm (0.6 in)	132 years	62 of 100 (Major)
31 July 1978	Port Isabel, US	monthly rain	130.8 mm (5.1 in)	68.6 mm (2.7 in)	2 years	58 of 100 (Notable)
31 July 1978	Little Hickman Lock 8, US	all-time rain	112.8 mm (4.4 in)	23.9 mm (0.9 in)	37 years	53 of 100 (Notable)
31 July 1978	Lumpkin 2 SE, US	daily rain	102.6 mm (4.0 in)	55.4 mm (2.2 in)	28 years	51 of 100 (Notable)
31 July 1978	Abbeville, FR	daily rain	35.1 mm (1.4 in)	19.5 mm (0.8 in)	55 years	49 of 100 (Notable)
31 July 1978	Arteaga (Smn), MX	daily rain	46.0 mm (1.8 in)	35.1 mm (1.4 in)	24 years	47 of 100 (Notable)
31 July 1978	College Hill Lock 11, US	daily rain	115.1 mm (4.5 in)	51.1 mm (2.0 in)	29 years	47 of 100 (Notable)
31 July 1978	Brest-Guipavas, FR	daily rain	34.5 mm (1.4 in)	29.7 mm (1.2 in)	12 years	46 of 100 (Notable)
31 July 1978	Ploumanac'h, FR	daily rain	26.0 mm (1.0 in)	20.8 mm (0.8 in)	5 years	44 of 100 (Notable)
31 July 1978	Feldberg/Schwarzwald, DE	daily rain	82.2 mm (3.2 in)	61.6 mm (2.4 in)	0 years	44 of 100 (Notable)
31 July 1978	Rothamsted, GB	daily rain	32.4 mm (1.3 in)	13.8 mm (0.5 in)	55 years	44 of 100 (Notable)
31 July 1978	Stereguscij, UA	daily rain	34.9 mm (1.4 in)	29.7 mm (1.2 in)	17 years	44 of 100 (Notable)
31 July 1978	Springfield, US	daily rain	33.0 mm (1.3 in)	17.0 mm (0.7 in)	79 years	44 of 100 (Notable)
31 July 1978	Springfield 2W, US	daily rain	88.1 mm (3.5 in)	41.6 mm (1.6 in)	28 years	44 of 100 (Notable)
31 July 1978	Keene 1 WSW, US	daily rain	88.1 mm (3.5 in)	47.5 mm (1.9 in)	16 years	43 of 100 (Notable)
31 July 1978	Fischers Store, US	daily rain	86.4 mm (3.4 in)	55.9 mm (2.2 in)	4 years	43 of 100 (Notable)
31 July 1978	Danville, US	daily rain	70.9 mm (2.8 in)	35.8 mm (1.4 in)	40 years	42 of 100 (Notable)
31 July 1978	High Brg Lock 7, US	monthly rain	92.7 mm (3.6 in)	9.4 mm (0.37 in)	63 years	42 of 100 (Notable)
31 July 1978	Fords Ferry Dam 5O, US	daily rain	61.0 mm (2.4 in)	28.0 mm (1.1 in)	40 years	41 of 100 (Notable)

Significance is a score from 0 to 100 combining margin, the age of the old record and the length of the station's record. How it is computed.

The Same Date in Other Years

1804 to 1978

Records set or tied on this calendar date in each year from 1804 to 1978. 1978 had 754 records.

Counts for years before the ledger starts come from the same station rules.

Records on 07-31 in each year
Year	Records
1804	1
1815	1
1816	1
1828	1
1834	1
1839	1
1840	1
1841	2
1851	1
1858	2
1860	4
1863	1
1866	1
1873	2
1876	1
1879	1
1884	1
1885	1
1886	1
1887	5
1889	2
1890	2
1891	1
1892	1
1893	3
1894	2
1896	2
1897	2
1898	5
1900	1
1901	3
1902	4
1903	16
1904	12
1905	10
1906	14
1907	17
1908	22
1909	15
1910	21
1911	29
1912	14
1913	31
1914	28
1915	71
1916	63
1917	126
1918	39
1919	27
1920	168
1921	112
1922	24
1923	236
1924	97
1925	349
1926	226
1927	161
1928	145
1929	134
1930	143
1931	441
1932	314
1933	504
1934	449
1935	418
1936	548
1937	297
1938	417
1939	357
1940	415
1941	323
1942	342
1943	342
1944	312
1945	499
1946	426
1947	341
1948	341
1949	406
1950	511
1951	364
1952	472
1953	414
1954	459
1955	813
1956	574
1957	268
1958	374
1959	424
1960	622
1961	504
1962	348
1963	294
1964	637
1965	858
1966	606
1967	326
1968	637
1969	440
1970	576
1971	1,850
1972	667
1973	583
1974	363
1975	1,386
1976	530
1977	543
1978	754
1979	501
1980	1,047
1981	672
1982	767
1983	901
1984	777
1985	1,065
1986	1,021
1987	934
1988	940
1989	1,753
1990	911
1991	647
1992	1,169
1993	1,031
1994	1,207
1995	1,223
1996	1,084
1997	984
1998	1,195
1999	1,643
2000	1,001
2001	1,414
2002	1,080
2003	1,157
2004	779
2005	742
2006	1,405
2007	1,023
2008	911
2009	1,156
2010	1,485
2011	1,040
2012	712
2013	469
2014	1,000
2015	948
2016	501
2017	485
2018	1,135
2019	551
2020	1,034
2021	1,020
2022	861
2023	671
2024	748
2025	836
2026	754

Download the Data

Data for records on 1978-07-31: CSV or JSON. Field meanings are on the data page.

Sources: 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)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 10	493
10 to 20	59
20 to 30	20
30 to 40	6
40 to 50	4
50 to 60	4
60 to 70	2