Weather Records on 21 May 2009

1,315 weather records were set or tied worldwide on 21 May 2009. Highest significance: Kyogle Post Office, AU.

Key Facts for 21 May 2009

On 21 May 2009, 1,315 weather records were set or tied at long-record stations worldwide.
463 were record highs and 381 were record lows, counting maximum and minimum temperature.
By timescale, 1 were all-time records, 40 monthly and 1,274 daily.
Kyogle Post Office set a daily record precipitation of 110.0 mm (4.3 in) on 21 May 2009.
Across 156 earlier years (1793 to 2026) the same calendar date averaged 455 records.

Record Map

1,315 stations

1,315 station records on 21 May 2009 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 21 May 2009: highest significance records shown on the map
Station	Country	Type	Value	Significance
Kyogle Post Office	Australia	Record daily precipitation	110.0 mm (4.3 in)	80 of 100 (Exceptional)
Mount Cotton West	Australia	Record daily precipitation	175.0 mm (6.9 in)	75 of 100 (Major)
Toowong Bowls Club	Australia	Record daily precipitation	102.4 mm (4.0 in)	69 of 100 (Major)
Canning Downs	Australia	Record daily precipitation	50.0 mm (2.0 in)	68 of 100 (Major)
Legume (New Koreelah)	Australia	Record daily precipitation	97.6 mm (3.8 in)	68 of 100 (Major)
Old Koreelah (White Swamp (Ede	Australia	Record daily precipitation	71.0 mm (2.8 in)	68 of 100 (Major)
Sunnybank Bowls Club	Australia	Record daily precipitation	92.8 mm (3.7 in)	67 of 100 (Major)
Killarney Post Office	Australia	Record daily precipitation	60.6 mm (2.4 in)	67 of 100 (Major)
Grandchester Symes St	Australia	Record daily precipitation	71.0 mm (2.8 in)	66 of 100 (Major)
Woolners Arm	Australia	Record daily precipitation	85.6 mm (3.4 in)	66 of 100 (Major)
Dalveen	Australia	Record daily precipitation	70.6 mm (2.8 in)	65 of 100 (Major)
Mt Nebo Post Office	Australia	Record daily precipitation	128.2 mm (5.0 in)	63 of 100 (Major)
Tannymorel	Australia	Record daily precipitation	54.6 mm (2.1 in)	63 of 100 (Major)
Parkfield	Australia	Record daily precipitation	82.2 mm (3.2 in)	62 of 100 (Major)
Lake Manchester	Australia	Record daily precipitation	187.0 mm (7.4 in)	62 of 100 (Major)
Moogerah Dam	Australia	Record daily precipitation	74.6 mm (2.9 in)	62 of 100 (Major)
Little Nerang Dam	Australia	Record daily precipitation	144.0 mm (5.7 in)	61 of 100 (Major)
Old Koreelah (McPherson)	Australia	Record daily precipitation	97.0 mm (3.8 in)	60 of 100 (Major)
Woodenbong (Unumgar St)	Australia	Record daily precipitation	83.0 mm (3.3 in)	60 of 100 (Major)
Chillingham	Australia	Record daily precipitation	177.0 mm (7.0 in)	60 of 100 (Major)
Doon Doon (McCabes Road)	Australia	Record daily precipitation	205.0 mm (8.1 in)	59 of 100 (Notable)
Ocala	United States	Record daily precipitation	73.2 mm (2.9 in)	59 of 100 (Notable)
Stanthorpe Leslie Parade	Australia	Record daily precipitation	50.8 mm (2.0 in)	58 of 100 (Notable)
Hausjarvi Lavinto	Finland	Record daily precipitation	37.8 mm (1.5 in)	58 of 100 (Notable)
Archerfield Airport	Australia	Record daily precipitation	95.0 mm (3.7 in)	57 of 100 (Notable)
Toombul Bowls Club	Australia	Record daily precipitation	126.4 mm (5.0 in)	57 of 100 (Notable)
Beerburrum Forest Station	Australia	Record daily precipitation	138.8 mm (5.5 in)	57 of 100 (Notable)
Tenterfield (Federation Park)	Australia	Record daily precipitation	101.8 mm (4.0 in)	56 of 100 (Notable)
Hammer Odde Fyr-1	Denmark	Record daily precipitation	25.0 mm (1.0 in)	56 of 100 (Notable)
Gatton Allan Street	Australia	Record daily precipitation	66.2 mm (2.6 in)	55 of 100 (Notable)
Harrisville Post Office	Australia	Record daily precipitation	82.0 mm (3.2 in)	55 of 100 (Notable)
Rosewood Walloon Rd	Australia	Record daily precipitation	105.0 mm (4.1 in)	55 of 100 (Notable)
Mount Cotton Farm	Australia	Record daily precipitation	111.0 mm (4.4 in)	55 of 100 (Notable)
The Channon	Australia	Record daily precipitation	143.2 mm (5.6 in)	55 of 100 (Notable)
Basel-Mulhouse	France	Record daily precipitation	34.8 mm (1.4 in)	55 of 100 (Notable)
Coominya Post Office	Australia	Record daily precipitation	92.0 mm (3.6 in)	54 of 100 (Notable)
Homeleigh	Australia	Record daily precipitation	107.0 mm (4.2 in)	54 of 100 (Notable)
Lees Ferry	United States	Record daily precipitation	26.4 mm (1.0 in)	54 of 100 (Notable)
Kuyura	Australia	Record daily precipitation	81.8 mm (3.2 in)	53 of 100 (Notable)
Brunswick Junction	Australia	Record daily precipitation	96.2 mm (3.8 in)	52 of 100 (Notable)
Rosevale	Australia	Record daily precipitation	90.6 mm (3.6 in)	52 of 100 (Notable)
Highvale	Australia	Record daily precipitation	116.0 mm (4.6 in)	52 of 100 (Notable)
Doolandella (Wadeville St)	Australia	Record daily precipitation	97.6 mm (3.8 in)	52 of 100 (Notable)
Carawatha	Australia	Record daily precipitation	54.0 mm (2.1 in)	52 of 100 (Notable)
Queen Mary Falls	Australia	Record daily precipitation	88.0 mm (3.5 in)	52 of 100 (Notable)
Top Plains	Australia	Record daily precipitation	91.6 mm (3.6 in)	52 of 100 (Notable)
Tabulam Post Office	Australia	Record daily precipitation	62.2 mm (2.4 in)	52 of 100 (Notable)
Hunter Springs (Wondecla)	Australia	Record daily precipitation	62.6 mm (2.5 in)	52 of 100 (Notable)
Roelands	Australia	Record daily precipitation	69.4 mm (2.7 in)	51 of 100 (Notable)
Numinbah	Australia	Record daily precipitation	203.0 mm (8.0 in)	51 of 100 (Notable)
Applethorpe	Australia	Record daily precipitation	59.0 mm (2.3 in)	51 of 100 (Notable)
Cangai (Smelter Creek)	Australia	Record daily precipitation	64.8 mm (2.6 in)	51 of 100 (Notable)
Chillingham (Limpinwood)	Australia	Record daily precipitation	195.0 mm (7.7 in)	51 of 100 (Notable)
Mayport Pilot STN	United States	Record daily precipitation	62.0 mm (2.4 in)	51 of 100 (Notable)
McKenzie Creek	Australia	Record daily precipitation	129.2 mm (5.1 in)	50 of 100 (Notable)
The Head	Australia	Record daily precipitation	78.0 mm (3.1 in)	50 of 100 (Notable)
Murwillumbah (Bray Park)	Australia	Record daily precipitation	145.0 mm (5.7 in)	50 of 100 (Notable)
Upper Orara (Dairyville)	Australia	Record daily precipitation	159.4 mm (6.3 in)	50 of 100 (Notable)
Nowendoc (Green Hills)	Australia	Record daily precipitation	55.6 mm (2.2 in)	50 of 100 (Notable)
Amcor - Petrie Mill	Australia	Record daily precipitation	88.6 mm (3.5 in)	49 of 100 (Notable)

Counts by Type and Timescale

1,315 records

Records set or tied on 21 May 2009 by type: Highest daily maximum 225, Lowest daily maximum 176, Highest daily minimum 238, Lowest daily minimum 205, Heaviest daily rainfall 471.

Records on 21 May 2009 by type
Record type	Records
Highest daily maximum	225
Lowest daily maximum	176
Highest daily minimum	238
Lowest daily minimum	205
Heaviest daily rainfall	471
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 21 May 2009 by timescale: all-time 1, monthly 40, daily 1,274.

How Much Records Were Beaten By

1,047 broken records

Margins by which the 1,047 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 168.0. Ties are not counted.

Top 20 by Significance

21 May 2009

Top 20 records on 21 May 2009 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 May 2009	Kyogle Post Office, AU	daily rain	110.0 mm (4.3 in)	78.2 mm (3.1 in)	103 years	80 of 100 (Exceptional)
21 May 2009	Mount Cotton West, AU	daily rain	175.0 mm (6.9 in)	128.0 mm (5.0 in)	87 years	75 of 100 (Major)
21 May 2009	Toowong Bowls Club, AU	daily rain	102.4 mm (4.0 in)	79.5 mm (3.1 in)	64 years	69 of 100 (Major)
21 May 2009	Canning Downs, AU	daily rain	50.0 mm (2.0 in)	28.9 mm (1.1 in)	116 years	68 of 100 (Major)
21 May 2009	Legume (New Koreelah), AU	daily rain	97.6 mm (3.8 in)	79.1 mm (3.1 in)	60 years	68 of 100 (Major)
21 May 2009	Old Koreelah (White Swamp (Ede, AU	daily rain	71.0 mm (2.8 in)	40.8 mm (1.6 in)	112 years	68 of 100 (Major)
21 May 2009	Sunnybank Bowls Club, AU	daily rain	92.8 mm (3.7 in)	63.1 mm (2.5 in)	64 years	67 of 100 (Major)
21 May 2009	Killarney Post Office, AU	daily rain	60.6 mm (2.4 in)	40.0 mm (1.6 in)	58 years	67 of 100 (Major)
21 May 2009	Grandchester Symes St, AU	daily rain	71.0 mm (2.8 in)	37.2 mm (1.5 in)	108 years	66 of 100 (Major)
21 May 2009	Woolners Arm, AU	daily rain	85.6 mm (3.4 in)	74.2 mm (2.9 in)	62 years	66 of 100 (Major)
21 May 2009	Dalveen, AU	daily rain	70.6 mm (2.8 in)	43.4 mm (1.7 in)	50 years	65 of 100 (Major)
21 May 2009	Mt Nebo Post Office, AU	daily rain	128.2 mm (5.0 in)	95.2 mm (3.7 in)	58 years	63 of 100 (Major)
21 May 2009	Tannymorel, AU	daily rain	54.6 mm (2.1 in)	27.9 mm (1.1 in)	90 years	63 of 100 (Major)
21 May 2009	Parkfield, AU	daily rain	82.2 mm (3.2 in)	28.4 mm (1.1 in)	95 years	62 of 100 (Major)
21 May 2009	Lake Manchester, AU	monthly rain	187.0 mm (7.4 in)	67.0 mm (2.6 in)	13 years	62 of 100 (Major)
21 May 2009	Moogerah Dam, AU	daily rain	74.6 mm (2.9 in)	52.0 mm (2.0 in)	60 years	62 of 100 (Major)
21 May 2009	Little Nerang Dam, AU	daily rain	144.0 mm (5.7 in)	100.8 mm (4.0 in)	47 years	61 of 100 (Major)
21 May 2009	Old Koreelah (McPherson), AU	daily rain	97.0 mm (3.8 in)	78.5 mm (3.1 in)	38 years	60 of 100 (Major)
21 May 2009	Woodenbong (Unumgar St), AU	daily rain	83.0 mm (3.3 in)	61.2 mm (2.4 in)	46 years	60 of 100 (Major)
21 May 2009	Chillingham, AU	daily rain	177.0 mm (7.0 in)	128.2 mm (5.0 in)	47 years	60 of 100 (Major)

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 2009

Records set or tied on this calendar date in each year from 1793 to 2009. 2009 had 1,315 records.

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

Records on 05-21 in each year
Year	Records
1793	1
1795	1
1811	1
1837	2
1842	1
1847	2
1854	1
1857	1
1858	1
1865	1
1866	1
1870	2
1875	1
1876	1
1880	2
1882	1
1885	1
1886	2
1887	3
1889	5
1890	3
1891	6
1892	1
1893	1
1894	4
1895	4
1896	5
1897	2
1898	1
1899	5
1900	1
1901	3
1902	4
1903	26
1904	8
1905	7
1906	12
1907	36
1908	13
1909	13
1910	14
1911	87
1912	24
1913	13
1914	26
1915	24
1916	13
1917	76
1918	51
1919	170
1920	39
1921	158
1922	39
1923	125
1924	148
1925	250
1926	221
1927	207
1928	173
1929	247
1930	133
1931	488
1932	343
1933	290
1934	590
1935	190
1936	328
1937	227
1938	348
1939	355
1940	456
1941	525
1942	482
1943	463
1944	310
1945	515
1946	324
1947	485
1948	312
1949	593
1950	403
1951	271
1952	385
1953	501
1954	961
1955	507
1956	409
1957	709
1958	511
1959	684
1960	615
1961	306
1962	553
1963	598
1964	788
1965	238
1966	296
1967	1,022
1968	549
1969	832
1970	449
1971	536
1972	557
1973	493
1974	847
1975	1,160
1976	393
1977	756
1978	575
1979	787
1980	857
1981	1,550
1982	599
1983	1,106
1984	950
1985	610
1986	908
1987	1,242
1988	819
1989	671
1990	947
1991	1,065
1992	1,143
1993	1,197
1994	656
1995	749
1996	1,461
1997	953
1998	1,200
1999	544
2000	897
2001	1,187
2002	2,048
2003	807
2004	898
2005	1,020
2006	810
2007	894
2008	740
2009	1,315
2010	962
2011	959
2012	848
2013	884
2014	522
2015	956
2016	567
2017	780
2018	525
2019	1,668
2020	707
2021	1,131
2022	1,512
2023	794
2024	751
2025	776
2026	356

Download the Data

Data for records on 2009-05-21: 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Margin	Records
0 to 25	898
25 to 50	70
50 to 75	44
75 to 100	21
100 to 125	7
125 to 150	4
150 to 175	3