Weather Records on 4 May 2021

616 weather records were set or tied worldwide on 4 May 2021. Highest significance: Ballan, AU.

Key Facts for 4 May 2021

On 4 May 2021, 616 weather records were set or tied at long-record stations worldwide.
232 were record highs and 73 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 14 monthly and 602 daily.
Ballan set a daily record precipitation of 47.6 mm (1.9 in) on 4 May 2021.
Across 163 earlier years (1795 to 2026) the same calendar date averaged 429 records.

Record Map

616 stations

616 station records on 4 May 2021 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 4 May 2021: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ballan	Australia	Record daily precipitation	47.6 mm (1.9 in)	80 of 100 (Exceptional)
Meredith	Australia	Record daily precipitation	45.8 mm (1.8 in)	80 of 100 (Exceptional)
Morrisons (Ballark)	Australia	Record daily precipitation	41.0 mm (1.6 in)	73 of 100 (Major)
Meredith (Darra)	Australia	Record daily precipitation	50.4 mm (2.0 in)	71 of 100 (Major)
Laverton Raaf	Australia	Record daily precipitation	42.2 mm (1.7 in)	67 of 100 (Major)
Scotsburn (Mount Boninyong)	Australia	Record daily precipitation	33.2 mm (1.3 in)	67 of 100 (Major)
Birmingham AP	United States	Record daily precipitation	91.2 mm (3.6 in)	67 of 100 (Major)
Woolsthorpe	Australia	Record daily precipitation	32.6 mm (1.3 in)	65 of 100 (Major)
Little River	Australia	Record daily precipitation	29.0 mm (1.1 in)	62 of 100 (Major)
Port Campbell Post Office	Australia	Record daily precipitation	36.8 mm (1.4 in)	59 of 100 (Notable)
Breakell	Australia	Record daily precipitation	37.6 mm (1.5 in)	58 of 100 (Notable)
Winchelsea (Post Office)	Australia	Record daily precipitation	41.2 mm (1.6 in)	57 of 100 (Notable)
Kaena Pt 841.3	United States	Record daily precipitation	28.4 mm (1.1 in)	57 of 100 (Notable)
Flemington Racecourse	Australia	Record daily precipitation	40.0 mm (1.6 in)	56 of 100 (Notable)
Wensleydale (Anglesea (Vehicle	Australia	Record daily precipitation	54.4 mm (2.1 in)	54 of 100 (Notable)
Beaufort	Australia	Record daily precipitation	26.2 mm (1.0 in)	54 of 100 (Notable)
Backefors	Sweden	Record daily precipitation	40.3 mm (1.6 in)	54 of 100 (Notable)
Gnaraloo	Australia	Record daily precipitation	40.8 mm (1.6 in)	53 of 100 (Notable)
Kolora (Wooriwyrite)	Australia	Record daily precipitation	27.8 mm (1.1 in)	52 of 100 (Notable)
Simpson South	Australia	Record daily precipitation	51.0 mm (2.0 in)	52 of 100 (Notable)
Marron	Australia	Record daily precipitation	29.0 mm (1.1 in)	51 of 100 (Notable)
Little River (Mount Rothwell)	Australia	Record daily precipitation	41.2 mm (1.6 in)	51 of 100 (Notable)
Melbourne Airport	Australia	Record daily precipitation	35.0 mm (1.4 in)	50 of 100 (Notable)
Moorabool Reservoir	Australia	Record daily precipitation	32.6 mm (1.3 in)	50 of 100 (Notable)
Oparino	Russia	Record daily precipitation	25.9 mm (1.0 in)	50 of 100 (Notable)
Bullengarook East (Seskinore)	Australia	Record daily precipitation	41.6 mm (1.6 in)	48 of 100 (Notable)
Partizansk	Russia	Record daily precipitation	46.0 mm (1.8 in)	47 of 100 (Notable)
Bungaree (Kirks Reservoir)	Australia	Record daily precipitation	28.8 mm (1.1 in)	46 of 100 (Notable)
Erofej Pavlovic	Russia	Record daily precipitation	32.0 mm (1.3 in)	46 of 100 (Notable)
Mammoth Cave	United States	Record daily precipitation	78.0 mm (3.1 in)	46 of 100 (Notable)
Buckley (Balliwindi)	Australia	Record daily precipitation	33.2 mm (1.3 in)	45 of 100 (Notable)
Hawkesdale (Post Office)	Australia	Record daily precipitation	26.0 mm (1.0 in)	45 of 100 (Notable)
Matuku	Fiji	Record daily precipitation	83.4 mm (3.3 in)	45 of 100 (Notable)
Nelaug	Norway	Record daily precipitation	42.2 mm (1.7 in)	45 of 100 (Notable)
Kilkivan Post Office	Australia	Record daily precipitation	26.0 mm (1.0 in)	44 of 100 (Notable)
Essendon Airport	Australia	Record daily precipitation	31.0 mm (1.2 in)	44 of 100 (Notable)
Durdidwarrah	Australia	Record daily precipitation	58.6 mm (2.3 in)	44 of 100 (Notable)
Bannockburn (Hillside)	Australia	Record daily precipitation	36.0 mm (1.4 in)	44 of 100 (Notable)
De Sabla	United States	Record high minimum temperature	16.7 C (62.1 F)	43 of 100 (Notable)
Blackwood	Australia	Record daily precipitation	36.2 mm (1.4 in)	42 of 100 (Notable)
Macedon Forestry	Australia	Record daily precipitation	25.6 mm (1.0 in)	42 of 100 (Notable)
Camperdown Donalds Hill	Australia	Record daily precipitation	33.0 mm (1.3 in)	42 of 100 (Notable)
Shoshone	United States	Record low maximum temperature	10.0 C (50.0 F)	42 of 100 (Notable)
Canton 4N	United States	Record high minimum temperature	22.2 C (72.0 F)	42 of 100 (Notable)
Poteet	United States	Record high minimum temperature	26.7 C (80.1 F)	42 of 100 (Notable)
Hartford Wwtp	United States	Record daily precipitation	51.1 mm (2.0 in)	42 of 100 (Notable)
Mestad I Oddernes	Norway	Record daily precipitation	48.9 mm (1.9 in)	41 of 100 (Notable)
Minden	United States	Record high minimum temperature	21.7 C (71.1 F)	41 of 100 (Notable)
Cape May 2 NW	United States	Record high maximum temperature	30.0 C (86.0 F)	41 of 100 (Notable)
Waynesville 1 E	United States	Record high minimum temperature	15.0 C (59.0 F)	41 of 100 (Notable)
Towner 2 NE	United States	Record low minimum temperature	-8.3 C (17.1 F)	41 of 100 (Notable)
Calhoun Falls	United States	Record daily precipitation	65.3 mm (2.6 in)	41 of 100 (Notable)
Pulaski 2 E	United States	Record high minimum temperature	15.6 C (60.1 F)	41 of 100 (Notable)
Lake Mills Wwtp	United States	Record daily precipitation	29.2 mm (1.1 in)	41 of 100 (Notable)
Oak Ridge Atdd	United States	Record daily precipitation	73.9 mm (2.9 in)	41 of 100 (Notable)
Cobargo (Wandella)	Australia	Record daily precipitation	42.0 mm (1.7 in)	40 of 100 (Notable)
Avalon Airport	Australia	Record daily precipitation	38.2 mm (1.5 in)	39 of 100 (Notable)
Bowling Green Warren Co AP	United States	Record daily precipitation	79.0 mm (3.1 in)	39 of 100 (Notable)
Glen Park (White Swan Reservoi	Australia	Record daily precipitation	28.8 mm (1.1 in)	38 of 100 (Notable)
Warrambine No 2	Australia	Record daily precipitation	27.6 mm (1.1 in)	37 of 100 (Notable)

Counts by Type and Timescale

616 records

Records set or tied on 4 May 2021 by type: Highest daily maximum 78, Lowest daily maximum 39, Highest daily minimum 154, Lowest daily minimum 34, Heaviest daily rainfall 307, Heaviest daily snowfall 3, Deepest snow cover 1.

Records on 4 May 2021 by type
Record type	Records
Highest daily maximum	78
Lowest daily maximum	39
Highest daily minimum	154
Lowest daily minimum	34
Heaviest daily rainfall	307
Heaviest daily snowfall	3
Deepest snow cover	1

Records on 4 May 2021 by timescale: all-time 0, monthly 14, daily 602.

How Much Records Were Beaten By

498 broken records

Margins by which the 498 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

4 May 2021

Top 20 records on 4 May 2021 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
4 May 2021	Ballan, AU	daily rain	47.6 mm (1.9 in)	31.1 mm (1.2 in)	122 years	80 of 100 (Exceptional)
4 May 2021	Meredith, AU	daily rain	45.8 mm (1.8 in)	29.0 mm (1.1 in)	132 years	80 of 100 (Exceptional)
4 May 2021	Morrisons (Ballark), AU	daily rain	41.0 mm (1.6 in)	26.5 mm (1.0 in)	76 years	73 of 100 (Major)
4 May 2021	Meredith (Darra), AU	daily rain	50.4 mm (2.0 in)	35.4 mm (1.4 in)	72 years	71 of 100 (Major)
4 May 2021	Laverton Raaf, AU	daily rain	42.2 mm (1.7 in)	23.1 mm (0.9 in)	66 years	67 of 100 (Major)
4 May 2021	Scotsburn (Mount Boninyong), AU	daily rain	33.2 mm (1.3 in)	17.2 mm (0.7 in)	132 years	67 of 100 (Major)
4 May 2021	Birmingham AP, US	daily rain	91.2 mm (3.6 in)	49.3 mm (1.9 in)	84 years	67 of 100 (Major)
4 May 2021	Woolsthorpe, AU	daily rain	32.6 mm (1.3 in)	14.3 mm (0.6 in)	94 years	65 of 100 (Major)
4 May 2021	Little River, AU	daily rain	29.0 mm (1.1 in)	11.7 mm (0.5 in)	99 years	62 of 100 (Major)
4 May 2021	Port Campbell Post Office, AU	daily rain	36.8 mm (1.4 in)	14.4 mm (0.6 in)	94 years	59 of 100 (Notable)
4 May 2021	Breakell, AU	daily rain	37.6 mm (1.5 in)	15.8 mm (0.6 in)	82 years	58 of 100 (Notable)
4 May 2021	Winchelsea (Post Office), AU	daily rain	41.2 mm (1.6 in)	21.4 mm (0.8 in)	38 years	57 of 100 (Notable)
4 May 2021	Kaena Pt 841.3, US	daily rain	28.4 mm (1.1 in)	23.3 mm (0.9 in)	42 years	57 of 100 (Notable)
4 May 2021	Flemington Racecourse, AU	daily rain	40.0 mm (1.6 in)	12.8 mm (0.5 in)	76 years	56 of 100 (Notable)
4 May 2021	Wensleydale (Anglesea (Vehicle, AU	daily rain	54.4 mm (2.1 in)	40.0 mm (1.6 in)	32 years	54 of 100 (Notable)
4 May 2021	Beaufort, AU	daily rain	26.2 mm (1.0 in)	9.9 mm (0.39 in)	94 years	54 of 100 (Notable)
4 May 2021	Backefors, SE	daily rain	40.3 mm (1.6 in)	28.1 mm (1.1 in)	24 years	54 of 100 (Notable)
4 May 2021	Gnaraloo, AU	daily rain	40.8 mm (1.6 in)	26.1 mm (1.0 in)	108 years	53 of 100 (Notable)
4 May 2021	Kolora (Wooriwyrite), AU	daily rain	27.8 mm (1.1 in)	8.0 mm (0.31 in)	94 years	52 of 100 (Notable)
4 May 2021	Simpson South, AU	daily rain	51.0 mm (2.0 in)	39.2 mm (1.5 in)	24 years	52 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

1795 to 2021

Records set or tied on this calendar date in each year from 1795 to 2021. 2021 had 616 records.

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

Records on 05-04 in each year
Year	Records
1795	1
1796	1
1820	1
1836	2
1840	1
1847	1
1850	2
1851	2
1852	1
1856	3
1858	1
1859	1
1861	2
1862	1
1864	3
1865	2
1868	3
1869	1
1870	2
1875	1
1877	2
1878	1
1879	1
1880	1
1882	1
1885	1
1886	1
1888	1
1889	4
1890	1
1892	4
1893	3
1894	6
1895	3
1896	3
1897	2
1898	2
1899	2
1900	2
1902	5
1903	8
1904	8
1905	19
1906	5
1907	37
1908	18
1909	13
1910	14
1911	37
1912	12
1913	63
1914	21
1915	75
1916	57
1917	60
1918	30
1919	69
1920	43
1921	62
1922	283
1923	82
1924	88
1925	80
1926	230
1927	112
1928	205
1929	177
1930	269
1931	169
1932	104
1933	274
1934	456
1935	518
1936	313
1937	230
1938	445
1939	295
1940	602
1941	436
1942	820
1943	358
1944	872
1945	654
1946	463
1947	649
1948	578
1949	1,130
1950	953
1951	292
1952	698
1953	389
1954	1,045
1955	471
1956	433
1957	433
1958	414
1959	613
1960	443
1961	466
1962	265
1963	313
1964	570
1965	433
1966	1,113
1967	928
1968	304
1969	377
1970	454
1971	810
1972	364
1973	313
1974	367
1975	683
1976	554
1977	736
1978	1,016
1979	1,529
1980	511
1981	667
1982	591
1983	539
1984	885
1985	821
1986	1,128
1987	1,004
1988	591
1989	743
1990	1,461
1991	1,088
1992	933
1993	791
1994	821
1995	974
1996	1,298
1997	962
1998	898
1999	1,167
2000	1,398
2001	1,345
2002	1,343
2003	1,158
2004	1,341
2005	1,152
2006	650
2007	699
2008	624
2009	727
2010	999
2011	1,023
2012	1,343
2013	1,447
2014	602
2015	622
2016	463
2017	669
2018	972
2019	574
2020	504
2021	616
2022	470
2023	681
2024	885
2025	456
2026	554

Download the Data

Data for records on 2021-05-04: 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	416
10 to 20	47
20 to 30	19
30 to 40	11
40 to 50	4
50 to 60	0
60 to 70	1