Weather Records on 31 July 1977

543 weather records were set or tied worldwide on 31 July 1977. Highest significance: Praha-Klementinum, CZ.

Key Facts for 31 July 1977

On 31 July 1977, 543 weather records were set or tied at long-record stations worldwide.
225 were record highs and 134 were record lows, counting maximum and minimum temperature.
By timescale, 3 were all-time records, 15 monthly and 525 daily.
Praha-Klementinum set a daily record precipitation of 66.5 mm (2.6 in) on 31 July 1977.
Across 155 earlier years (1804 to 2026) the same calendar date averaged 471 records.

Record Map

543 stations

543 station records on 31 July 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 31 July 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Praha-Klementinum	Czech Republic	Record daily precipitation	66.5 mm (2.6 in)	80 of 100 (Exceptional)
Hohenpeissenberg	Germany	Record daily precipitation	84.3 mm (3.3 in)	77 of 100 (Major)
Bad Reichenhall	Germany	Record daily precipitation	180.7 mm (7.1 in)	70 of 100 (Major)
Salzburg	Austria	Record daily precipitation	116.7 mm (4.6 in)	69 of 100 (Major)
Saentis	Switzerland	Record daily precipitation	91.1 mm (3.6 in)	63 of 100 (Major)
Bologna	Italy	Record daily precipitation	41.2 mm (1.6 in)	61 of 100 (Major)
Kempten	Germany	Record daily precipitation	70.2 mm (2.8 in)	60 of 100 (Major)
Reit Im Winkl	Germany	Record daily precipitation	135.3 mm (5.3 in)	57 of 100 (Notable)
Ebersberg-Halbing	Germany	Record daily precipitation	73.8 mm (2.9 in)	56 of 100 (Notable)
Mittenwald-Buckelwiesen	Germany	Record daily precipitation	86.3 mm (3.4 in)	55 of 100 (Notable)
Weihenstephan-Durnast	Germany	Record daily precipitation	57.7 mm (2.3 in)	55 of 100 (Notable)
Aguiar	Brazil	Record daily precipitation	26.0 mm (1.0 in)	54 of 100 (Notable)
Toronto	Canada	Record daily precipitation	45.2 mm (1.8 in)	53 of 100 (Notable)
Grosser Falkenstein	Germany	Record daily precipitation	96.9 mm (3.8 in)	53 of 100 (Notable)
Wellston Tippy Dam	United States	Record daily precipitation	88.9 mm (3.5 in)	53 of 100 (Notable)
Dippoldiswalde-Reinberg	Germany	Record daily precipitation	58.9 mm (2.3 in)	50 of 100 (Notable)
Huell	Germany	Record daily precipitation	63.3 mm (2.5 in)	49 of 100 (Notable)
Annaberg-Buchholz	Germany	Record daily precipitation	48.3 mm (1.9 in)	48 of 100 (Notable)
Mauth-Finsterau	Germany	Record daily precipitation	65.0 mm (2.6 in)	48 of 100 (Notable)
Bad Kohlgrub (A)	Germany	Record daily precipitation	71.7 mm (2.8 in)	48 of 100 (Notable)
Oberstdorf	Germany	Record daily precipitation	103.3 mm (4.1 in)	47 of 100 (Notable)
Fichtelberg	Germany	Record daily precipitation	65.8 mm (2.6 in)	46 of 100 (Notable)
Kiefersfelden-Gach	Germany	Record daily precipitation	109.7 mm (4.3 in)	45 of 100 (Notable)
Ust-Hairyuzovo	Russia	Record daily precipitation	33.9 mm (1.3 in)	45 of 100 (Notable)
Nikolo-Poloma	Russia	Record daily precipitation	56.2 mm (2.2 in)	44 of 100 (Notable)
Ft Madison	United States	Record daily precipitation	90.2 mm (3.6 in)	44 of 100 (Notable)
Grindstone Island	Canada	Record daily precipitation	28.3 mm (1.1 in)	43 of 100 (Notable)
Passau-Maierhof	Germany	Record daily precipitation	28.4 mm (1.1 in)	43 of 100 (Notable)
Aldersbach-Kriestorf	Germany	Record daily precipitation	39.2 mm (1.5 in)	43 of 100 (Notable)
Albacete Los Llanos	Spain	Record low minimum temperature	7.6 C (45.7 F)	42 of 100 (Notable)
Gazimammad Aerodrom	Azerbaijan	Record daily precipitation	25.4 mm (1.0 in)	41 of 100 (Notable)
Marseille Obs. Palais-Lonchamp	France	Record low maximum temperature	21.1 C (70.0 F)	41 of 100 (Notable)
La Harpe	United States	Record daily precipitation	79.5 mm (3.1 in)	41 of 100 (Notable)
Sonnblick	Austria	Record daily precipitation	32.8 mm (1.3 in)	40 of 100 (Notable)
Krumbach-Edenhausen	Germany	Record daily precipitation	44.0 mm (1.7 in)	40 of 100 (Notable)
Ferrara	Italy	Record daily precipitation	36.3 mm (1.4 in)	40 of 100 (Notable)
Sao Paulo Do Potengi	Brazil	Record daily precipitation	50.0 mm (2.0 in)	38 of 100 (Notable)
San Felipe	Mexico	Record low minimum temperature	10.0 C (50.0 F)	38 of 100 (Notable)
Chapulco	Mexico	Record high minimum temperature	18.3 C (64.9 F)	38 of 100 (Notable)
Aztec Ruins Nm	United States	Record low minimum temperature	7.2 C (45.0 F)	38 of 100 (Notable)
Augsburg	Germany	Record daily precipitation	51.9 mm (2.0 in)	37 of 100 (Notable)
Itaporanga (Misericordia)	Brazil	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Port Aux Basques	Canada	Record daily precipitation	47.2 mm (1.9 in)	36 of 100 (Notable)
Col du Grand St-Bernard	Switzerland	Record daily precipitation	47.7 mm (1.9 in)	36 of 100 (Notable)
Millinocket	United States	Record daily precipitation	34.3 mm (1.4 in)	36 of 100 (Notable)
Perry	United States	Record daily precipitation	38.6 mm (1.5 in)	36 of 100 (Notable)
Hambantota	Sri Lanka	Record high maximum temperature	35.5 C (95.9 F)	35 of 100 (Notable)
Lugano	Switzerland	Record low maximum temperature	18.6 C (65.5 F)	35 of 100 (Notable)
Hayward Rs	United States	Record daily precipitation	54.9 mm (2.2 in)	35 of 100 (Notable)
Corner Brook	Canada	Record daily precipitation	27.7 mm (1.1 in)	34 of 100 (Routine)
Nicosia	Cyprus	Record high minimum temperature	25.6 C (78.1 F)	34 of 100 (Routine)
Charlottetown A	Canada	Record daily precipitation	52.0 mm (2.0 in)	33 of 100 (Routine)
Sigmarszell-Zeisertsweiler	Germany	Record daily precipitation	88.7 mm (3.5 in)	33 of 100 (Routine)
Garmisch-Partenkirchen	Germany	Record daily precipitation	89.6 mm (3.5 in)	33 of 100 (Routine)
Berkeley	United States	Record high maximum temperature	27.2 C (81.0 F)	33 of 100 (Routine)
Los Gatos	United States	Record high maximum temperature	39.4 C (102.9 F)	33 of 100 (Routine)
Kremsmuenster	Austria	Record daily precipitation	51.2 mm (2.0 in)	32 of 100 (Routine)
Barrage Temiscamingue	Canada	Record daily precipitation	36.6 mm (1.4 in)	32 of 100 (Routine)
Graton	United States	Record high maximum temperature	42.2 C (108.0 F)	32 of 100 (Routine)
Quincy	United States	Record high maximum temperature	40.6 C (105.1 F)	32 of 100 (Routine)

Counts by Type and Timescale

543 records

Records set or tied on 31 July 1977 by type: Highest daily maximum 139, Lowest daily maximum 58, Highest daily minimum 86, Lowest daily minimum 76, Heaviest daily rainfall 184.

Records on 31 July 1977 by type
Record type	Records
Highest daily maximum	139
Lowest daily maximum	58
Highest daily minimum	86
Lowest daily minimum	76
Heaviest daily rainfall	184
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 31 July 1977 by timescale: all-time 3, monthly 15, daily 525.

How Much Records Were Beaten By

439 broken records

Margins by which the 439 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 75.4. Ties are not counted.

Top 20 by Significance

31 July 1977

Top 20 records on 31 July 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
31 July 1977	Praha-Klementinum, CZ	daily rain	66.5 mm (2.6 in)	45.8 mm (1.8 in)	116 years	80 of 100 (Exceptional)
31 July 1977	Hohenpeissenberg, DE	daily rain	84.3 mm (3.3 in)	47.1 mm (1.9 in)	90 years	77 of 100 (Major)
31 July 1977	Bad Reichenhall, DE	all-time rain	180.7 mm (7.1 in)	75.4 mm (3.0 in)	23 years	70 of 100 (Major)
31 July 1977	Salzburg, AT	daily rain	116.7 mm (4.6 in)	61.7 mm (2.4 in)	74 years	69 of 100 (Major)
31 July 1977	Saentis, CH	daily rain	91.1 mm (3.6 in)	55.5 mm (2.2 in)	74 years	63 of 100 (Major)
31 July 1977	Bologna, IT	daily rain	41.2 mm (1.6 in)	22.2 mm (0.9 in)	134 years	61 of 100 (Major)
31 July 1977	Kempten, DE	daily rain	70.2 mm (2.8 in)	40.5 mm (1.6 in)	40 years	60 of 100 (Major)
31 July 1977	Reit Im Winkl, DE	all-time rain	135.3 mm (5.3 in)	14.8 mm (0.6 in)	65 years	57 of 100 (Notable)
31 July 1977	Ebersberg-Halbing, DE	daily rain	73.8 mm (2.9 in)	46.0 mm (1.8 in)	40 years	56 of 100 (Notable)
31 July 1977	Mittenwald-Buckelwiesen, DE	daily rain	86.3 mm (3.4 in)	64.6 mm (2.5 in)	38 years	55 of 100 (Notable)
31 July 1977	Weihenstephan-Durnast, DE	daily rain	57.7 mm (2.3 in)	47.9 mm (1.9 in)	38 years	55 of 100 (Notable)
31 July 1977	Aguiar, BR	daily rain	26.0 mm (1.0 in)	26.0 mm (1.0 in)	43 years	54 of 100 (Notable)
31 July 1977	Toronto, CA	daily rain	45.2 mm (1.8 in)	13.2 mm (0.5 in)	119 years	53 of 100 (Notable)
31 July 1977	Grosser Falkenstein, DE	monthly rain	96.9 mm (3.8 in)	44.0 mm (1.7 in)	1 year	53 of 100 (Notable)
31 July 1977	Wellston Tippy Dam, US	monthly rain	88.9 mm (3.5 in)	22.9 mm (0.9 in)	56 years	53 of 100 (Notable)
31 July 1977	Dippoldiswalde-Reinberg, DE	daily rain	58.9 mm (2.3 in)	50.1 mm (2.0 in)	24 years	50 of 100 (Notable)
31 July 1977	Huell, DE	daily rain	63.3 mm (2.5 in)	40.5 mm (1.6 in)	18 years	49 of 100 (Notable)
31 July 1977	Annaberg-Buchholz, DE	daily rain	48.3 mm (1.9 in)	38.9 mm (1.5 in)	24 years	48 of 100 (Notable)
31 July 1977	Mauth-Finsterau, DE	daily rain	65.0 mm (2.6 in)	52.9 mm (2.1 in)	18 years	48 of 100 (Notable)
31 July 1977	Bad Kohlgrub (A), DE	daily rain	71.7 mm (2.8 in)	47.3 mm (1.9 in)	30 years	48 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 1977

Records set or tied on this calendar date in each year from 1804 to 1977. 1977 had 543 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 1977-07-31: 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	355
10 to 20	44
20 to 30	17
30 to 40	6
40 to 50	10
50 to 60	3
60 to 70	2
70 to 80	2