Weather Records on 23 May 1977

596 weather records were set or tied worldwide on 23 May 1977. Highest significance: Greensburg, US.

Key Facts for 23 May 1977

On 23 May 1977, 596 weather records were set or tied at long-record stations worldwide.
337 were record highs and 103 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 53 monthly and 543 daily.
Greensburg set a daily record precipitation of 79.5 mm (3.1 in) on 23 May 1977.
Across 158 earlier years (1793 to 2026) the same calendar date averaged 462 records.

Record Map

596 stations

596 station records on 23 May 1977 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 23 May 1977: highest significance records shown on the map
Station	Country	Type	Value	Significance
Greensburg	United States	Record daily precipitation	79.5 mm (3.1 in)	58 of 100 (Notable)
Piaxtla	Mexico	Record daily precipitation	80.3 mm (3.2 in)	52 of 100 (Notable)
Laredo	United States	Record daily precipitation	144.8 mm (5.7 in)	51 of 100 (Notable)
Kharkiv	Ukraine	Record daily precipitation	37.7 mm (1.5 in)	50 of 100 (Notable)
St Andrews	Canada	Record high maximum temperature	32.2 C (90.0 F)	47 of 100 (Notable)
Norwich	United States	Record daily precipitation	65.3 mm (2.6 in)	46 of 100 (Notable)
Disraeli	Canada	Record high minimum temperature	21.7 C (71.1 F)	42 of 100 (Notable)
Garden Valley	United States	Record daily precipitation	32.3 mm (1.3 in)	42 of 100 (Notable)
Attica 6 WNW	United States	Record daily precipitation	88.9 mm (3.5 in)	42 of 100 (Notable)
Armstrong (Aut)	Canada	Record daily precipitation	33.2 mm (1.3 in)	40 of 100 (Notable)
Eagle Pass 3N	United States	Record daily precipitation	102.4 mm (4.0 in)	40 of 100 (Notable)
Piranhas (Marechal Floriano)	Brazil	Record daily precipitation	30.0 mm (1.2 in)	39 of 100 (Notable)
Chelsea	Canada	Record daily precipitation	39.4 mm (1.6 in)	39 of 100 (Notable)
Chicoutimi	Canada	Record high maximum temperature	33.9 C (93.0 F)	39 of 100 (Notable)
Lake Margaret Dam	Australia	Record daily precipitation	72.5 mm (2.9 in)	37 of 100 (Notable)
Orono	United States	Record high minimum temperature	16.7 C (62.1 F)	37 of 100 (Notable)
Eastport	United States	Record high minimum temperature	11.1 C (52.0 F)	36 of 100 (Notable)
Farmington	United States	Record high maximum temperature	35.0 C (95.0 F)	36 of 100 (Notable)
Nicolet	Canada	Record high minimum temperature	22.2 C (72.0 F)	35 of 100 (Notable)
Juncos 1 SE	Puerto Rico [United States]	Record daily precipitation	89.2 mm (3.5 in)	35 of 100 (Notable)
Nicosia	Cyprus	Record high minimum temperature	19.9 C (67.8 F)	34 of 100 (Routine)
Turgaj	Kazakhstan	Record high minimum temperature	21.6 C (70.9 F)	34 of 100 (Routine)
Gardiner	United States	Record high maximum temperature	32.8 C (91.0 F)	34 of 100 (Routine)
Sedgwick	United States	Record daily precipitation	39.9 mm (1.6 in)	33 of 100 (Routine)
Bar Harbor 3 NW	United States	Record high minimum temperature	13.9 C (57.0 F)	33 of 100 (Routine)
Eastport	United States	Record high maximum temperature	30.6 C (87.1 F)	33 of 100 (Routine)
Ottawa Cda	Canada	Record daily precipitation	43.6 mm (1.7 in)	32 of 100 (Routine)
Chicoutimi	Canada	Record high minimum temperature	15.0 C (59.0 F)	32 of 100 (Routine)
Nappan Cda	Canada	Record high maximum temperature	29.4 C (84.9 F)	32 of 100 (Routine)
Houlton	United States	Record high maximum temperature	33.9 C (93.0 F)	32 of 100 (Routine)
Amos	Canada	Record high minimum temperature	17.8 C (64.0 F)	31 of 100 (Routine)
Sussex	Canada	Record high maximum temperature	33.9 C (93.0 F)	31 of 100 (Routine)
Kentville Cda	Canada	Record high maximum temperature	32.5 C (90.5 F)	31 of 100 (Routine)
Charlottetown Cda	Canada	Record high maximum temperature	31.7 C (89.1 F)	31 of 100 (Routine)
Cidra 1 E	Puerto Rico [United States]	Record daily precipitation	61.0 mm (2.4 in)	31 of 100 (Routine)
Lajas Substn	Puerto Rico [United States]	Record daily precipitation	53.8 mm (2.1 in)	31 of 100 (Routine)
Belfast	United States	Record high maximum temperature	32.8 C (91.0 F)	31 of 100 (Routine)
Houlton	United States	Record high minimum temperature	18.3 C (64.9 F)	31 of 100 (Routine)
Orono	United States	Record high maximum temperature	37.2 C (99.0 F)	31 of 100 (Routine)
Calmar	Canada	Record high minimum temperature	13.3 C (55.9 F)	30 of 100 (Routine)
Cochrane	Canada	Record high minimum temperature	17.2 C (63.0 F)	30 of 100 (Routine)
Welland	Canada	Record high minimum temperature	17.5 C (63.5 F)	30 of 100 (Routine)
Tadoussac	Canada	Record high minimum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Gaspe	Canada	Record high maximum temperature	27.8 C (82.0 F)	30 of 100 (Routine)
Mount Uniacke	Canada	Record high maximum temperature	32.2 C (90.0 F)	30 of 100 (Routine)
Springfield	Canada	Record high maximum temperature	32.2 C (90.0 F)	30 of 100 (Routine)
Puerto Madero	Mexico	Record low minimum temperature	12.8 C (55.0 F)	30 of 100 (Routine)
Vinnytsia	Ukraine	Record daily precipitation	30.6 mm (1.2 in)	30 of 100 (Routine)
Medicine Lodge	United States	Record daily precipitation	56.4 mm (2.2 in)	30 of 100 (Routine)
Mount Hope	Australia	Record daily precipitation	37.0 mm (1.5 in)	29 of 100 (Routine)
Woodstock	Canada	Record high minimum temperature	17.5 C (63.5 F)	29 of 100 (Routine)
Price	Canada	Record high minimum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Orland	United States	Record low maximum temperature	17.8 C (64.0 F)	29 of 100 (Routine)
Kingman	United States	Record daily precipitation	81.3 mm (3.2 in)	29 of 100 (Routine)
Frankfort 2NE	United States	Record high maximum temperature	28.9 C (84.0 F)	28 of 100 (Routine)
Beaver	United States	Record high minimum temperature	10.6 C (51.1 F)	28 of 100 (Routine)
Hanksville	United States	Record high minimum temperature	17.8 C (64.0 F)	28 of 100 (Routine)
Los Angeles Downtown/Usc	United States	Record low maximum temperature	16.7 C (62.1 F)	28 of 100 (Routine)
Pointe Au Pere	Canada	Record high minimum temperature	16.7 C (62.1 F)	27 of 100 (Routine)
Shearwater A	Canada	Record high maximum temperature	32.0 C (89.6 F)	27 of 100 (Routine)

Counts by Type and Timescale

596 records

Records set or tied on 23 May 1977 by type: Highest daily maximum 174, Lowest daily maximum 63, Highest daily minimum 163, Lowest daily minimum 40, Heaviest daily rainfall 156.

Records on 23 May 1977 by type
Record type	Records
Highest daily maximum	174
Lowest daily maximum	63
Highest daily minimum	163
Lowest daily minimum	40
Heaviest daily rainfall	156
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 23 May 1977 by timescale: all-time 0, monthly 53, daily 543.

How Much Records Were Beaten By

466 broken records

Margins by which the 466 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 61.5. Ties are not counted.

Top 20 by Significance

23 May 1977

Top 20 records on 23 May 1977 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 May 1977	Greensburg, US	daily rain	79.5 mm (3.1 in)	37.8 mm (1.5 in)	68 years	58 of 100 (Notable)
23 May 1977	Piaxtla, MX	daily rain	80.3 mm (3.2 in)	61.5 mm (2.4 in)	24 years	52 of 100 (Notable)
23 May 1977	Laredo, US	daily rain	144.8 mm (5.7 in)	43.2 mm (1.7 in)	85 years	51 of 100 (Notable)
23 May 1977	Kharkiv, UA	daily rain	37.7 mm (1.5 in)	22.8 mm (0.9 in)	22 years	50 of 100 (Notable)
23 May 1977	St Andrews, CA	monthly high max	32.2 C (90.0 F)	1.6 C (2.9 F)	82 years	47 of 100 (Notable)
23 May 1977	Norwich, US	daily rain	65.3 mm (2.6 in)	28.7 mm (1.1 in)	68 years	46 of 100 (Notable)
23 May 1977	Disraeli, CA	monthly high min	21.7 C (71.1 F)	3.4 C (6.1 F)	66 years	42 of 100 (Notable)
23 May 1977	Garden Valley, US	daily rain	32.3 mm (1.3 in)	12.2 mm (0.5 in)	35 years	42 of 100 (Notable)
23 May 1977	Attica 6 WNW, US	daily rain	88.9 mm (3.5 in)	50.3 mm (2.0 in)	28 years	42 of 100 (Notable)
23 May 1977	Armstrong (Aut), CA	daily rain	33.2 mm (1.3 in)	18.2 mm (0.7 in)	27 years	40 of 100 (Notable)
23 May 1977	Eagle Pass 3N, US	daily rain	102.4 mm (4.0 in)	26.2 mm (1.0 in)	68 years	40 of 100 (Notable)
23 May 1977	Piranhas (Marechal Floriano), BR	daily rain	30.0 mm (1.2 in)	13.5 mm (0.5 in)	47 years	39 of 100 (Notable)
23 May 1977	Chelsea, CA	daily rain	39.4 mm (1.6 in)	16.3 mm (0.6 in)	39 years	39 of 100 (Notable)
23 May 1977	Chicoutimi, CA	daily high max	33.9 C (93.0 F)	1.7 C (3.1 F)	95 years	39 of 100 (Notable)
23 May 1977	Lake Margaret Dam, AU	daily rain	72.5 mm (2.9 in)	29.3 mm (1.2 in)	46 years	37 of 100 (Notable)
23 May 1977	Orono, US	daily high min	16.7 C (62.1 F)	2.8 C (5.0 F)	76 years	37 of 100 (Notable)
23 May 1977	Eastport, US	daily high min	11.1 C (52.0 F)	2.2 C (4.0 F)	62 years	36 of 100 (Notable)
23 May 1977	Farmington, US	daily high max	35.0 C (95.0 F)	2.8 C (5.0 F)	82 years	36 of 100 (Notable)
23 May 1977	Nicolet, CA	monthly high min	22.2 C (72.0 F)	1.1 C (2.0 F)	59 years	35 of 100 (Notable)
23 May 1977	Juncos 1 SE, PR	daily rain	89.2 mm (3.5 in)	54.9 mm (2.2 in)	6 years	35 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

1793 to 1977

Records set or tied on this calendar date in each year from 1793 to 1977. 1977 had 596 records.

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

Records on 05-23 in each year
Year	Records
1793	1
1794	1
1798	1
1817	1
1818	1
1837	3
1845	1
1847	2
1857	1
1863	1
1865	2
1866	5
1867	7
1870	2
1871	1
1875	1
1877	1
1878	1
1880	1
1884	2
1885	2
1886	4
1887	1
1889	2
1891	11
1893	3
1894	1
1895	3
1896	4
1897	3
1898	8
1899	3
1900	12
1901	3
1902	12
1903	6
1904	14
1905	10
1906	23
1907	11
1908	13
1909	23
1910	26
1911	39
1912	31
1913	29
1914	33
1915	13
1916	44
1917	58
1918	36
1919	120
1920	37
1921	92
1922	82
1923	99
1924	230
1925	325
1926	204
1927	243
1928	177
1929	221
1930	199
1931	719
1932	358
1933	443
1934	203
1935	369
1936	568
1937	156
1938	390
1939	415
1940	324
1941	676
1942	235
1943	342
1944	784
1945	241
1946	311
1947	285
1948	273
1949	612
1950	490
1951	400
1952	597
1953	777
1954	496
1955	650
1956	498
1957	653
1958	744
1959	486
1960	395
1961	412
1962	677
1963	1,153
1964	964
1965	477
1966	391
1967	1,055
1968	578
1969	437
1970	314
1971	659
1972	449
1973	371
1974	678
1975	855
1976	556
1977	596
1978	703
1979	730
1980	1,202
1981	862
1982	717
1983	1,123
1984	1,027
1985	608
1986	626
1987	745
1988	662
1989	1,106
1990	1,660
1991	1,244
1992	1,423
1993	845
1994	690
1995	1,106
1996	1,114
1997	983
1998	947
1999	705
2000	1,372
2001	1,441
2002	1,537
2003	954
2004	1,275
2005	908
2006	1,122
2007	1,170
2008	1,472
2009	805
2010	1,275
2011	1,001
2012	1,006
2013	929
2014	858
2015	667
2016	679
2017	602
2018	552
2019	1,044
2020	631
2021	837
2022	807
2023	316
2024	760
2025	865
2026	804

Download the Data

Data for records on 1977-05-23: 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	435
10 to 20	18
20 to 30	8
30 to 40	1
40 to 50	1
50 to 60	2
60 to 70	1