Weather Records on 15 May 1909

89 weather records were set or tied worldwide on 15 May 1909. Highest significance: Mount Gambier Post Office, AU.

Key Facts for 15 May 1909

On 15 May 1909, 89 weather records were set or tied at long-record stations worldwide.
5 were record highs and 14 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 2 monthly and 87 daily.
Mount Gambier Post Office set a monthly record daily precipitation of 68.6 mm (2.7 in) on 15 May 1909.
Across 162 earlier years (1820 to 2026) the same calendar date averaged 433 records.

Record Map

89 stations

89 station records on 15 May 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 15 May 1909: highest significance records shown on the map
Station	Country	Type	Value	Significance
Mount Gambier Post Office	Australia	Record daily precipitation	68.6 mm (2.7 in)	64 of 100 (Major)
Bendigo Prison	Australia	Record daily precipitation	33.0 mm (1.3 in)	53 of 100 (Notable)
Cape Northumberland	Australia	Record daily precipitation	40.9 mm (1.6 in)	52 of 100 (Notable)
Wangaratta	Australia	Record daily precipitation	46.0 mm (1.8 in)	50 of 100 (Notable)
Smeaton Weir	Australia	Record daily precipitation	33.8 mm (1.3 in)	50 of 100 (Notable)
Daylesford	Australia	Record daily precipitation	51.6 mm (2.0 in)	50 of 100 (Notable)
Kyneton Post Office	Australia	Record daily precipitation	41.9 mm (1.6 in)	50 of 100 (Notable)
Newlyn Reservoir	Australia	Record daily precipitation	46.5 mm (1.8 in)	50 of 100 (Notable)
Castlemaine	Australia	Record daily precipitation	28.2 mm (1.1 in)	48 of 100 (Notable)
Collendina	Australia	Record daily precipitation	35.8 mm (1.4 in)	47 of 100 (Notable)
Ballan	Australia	Record daily precipitation	29.7 mm (1.2 in)	46 of 100 (Notable)
Goulburn River @ Shepparton	Australia	Record daily precipitation	33.3 mm (1.3 in)	43 of 100 (Notable)
Maryborough	Australia	Record daily precipitation	25.1 mm (1.0 in)	43 of 100 (Notable)
Clunes	Australia	Record daily precipitation	25.4 mm (1.0 in)	42 of 100 (Notable)
Roto (Coombie)	Australia	Record daily precipitation	38.1 mm (1.5 in)	41 of 100 (Notable)
Blackwood	Australia	Record daily precipitation	39.1 mm (1.5 in)	39 of 100 (Notable)
Jerilderie (Yanko Station)	Australia	Record daily precipitation	25.4 mm (1.0 in)	37 of 100 (Notable)
Maldon (Derby Hill)	Australia	Record daily precipitation	34.3 mm (1.4 in)	34 of 100 (Routine)
Benerembah	Australia	Record daily precipitation	26.7 mm (1.1 in)	31 of 100 (Routine)
Kaarimba	Australia	Record daily precipitation	45.5 mm (1.8 in)	27 of 100 (Routine)
Urana (Butherwah)	Australia	Record daily precipitation	25.9 mm (1.0 in)	25 of 100 (Routine)
Groongal (Groongal Station)	Australia	Record daily precipitation	30.5 mm (1.2 in)	23 of 100 (Routine)
Mulwala Homestead	Australia	Record daily precipitation	35.1 mm (1.4 in)	22 of 100 (Routine)
Mount Bute	Australia	Record daily precipitation	27.2 mm (1.1 in)	22 of 100 (Routine)
Yarrawonga Post Office	Australia	Record daily precipitation	32.8 mm (1.3 in)	21 of 100 (Routine)
Scotsburn (Mount Boninyong)	Australia	Record daily precipitation	32.8 mm (1.3 in)	21 of 100 (Routine)
Armagh	United Kingdom	Record low maximum temperature	9.6 C (49.3 F)	21 of 100 (Routine)
Rokewood (the Meadows)	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Werribee (Wyndham)	Australia	Record daily precipitation	22.1 mm (0.9 in)	20 of 100 (Routine)
Yan Yean	Australia	Record daily precipitation	20.3 mm (0.8 in)	20 of 100 (Routine)
Berrybank	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Melbourne Regional Office	Australia	Record daily precipitation	22.9 mm (0.9 in)	20 of 100 (Routine)
Cobar (Paddington)	Australia	Record daily precipitation	24.6 mm (1.0 in)	20 of 100 (Routine)
Youngara 1	Australia	Record daily precipitation	15.0 mm (0.6 in)	20 of 100 (Routine)
Sunbury (Salesian College )	Australia	Record daily precipitation	21.6 mm (0.9 in)	20 of 100 (Routine)
Darlington Point (Tubbo)	Australia	Record daily precipitation	19.3 mm (0.8 in)	20 of 100 (Routine)
Euston Post Office	Australia	Record daily precipitation	17.3 mm (0.7 in)	20 of 100 (Routine)
Geelong Sec	Australia	Record daily precipitation	24.1 mm (0.9 in)	20 of 100 (Routine)
Stratford	Australia	Record daily precipitation	18.5 mm (0.7 in)	20 of 100 (Routine)
Ararat Post Office	Australia	Record daily precipitation	14.5 mm (0.6 in)	20 of 100 (Routine)
Portland	Australia	Record daily precipitation	18.3 mm (0.7 in)	20 of 100 (Routine)
Warracknabeal Post Office	Australia	Record daily precipitation	12.4 mm (0.5 in)	20 of 100 (Routine)
Ivanhoe (Wokabity)	Australia	Record daily precipitation	12.7 mm (0.5 in)	20 of 100 (Routine)
Robe Comparison	Australia	Record daily precipitation	24.9 mm (1.0 in)	19 of 100 (Routine)
Balranald (Rsl)	Australia	Record daily precipitation	16.8 mm (0.7 in)	19 of 100 (Routine)
Thelangerin East	Australia	Record daily precipitation	18.8 mm (0.7 in)	19 of 100 (Routine)
Kinchega	Australia	Record daily precipitation	12.7 mm (0.5 in)	18 of 100 (Routine)
Urana Post Office	Australia	Record daily precipitation	20.3 mm (0.8 in)	18 of 100 (Routine)
Deniliquin (Wilkinson St)	Australia	Record low maximum temperature	12.2 C (54.0 F)	18 of 100 (Routine)
Horsham Polkemmet Rd	Australia	Record daily precipitation	14.5 mm (0.6 in)	18 of 100 (Routine)
Whroo	Australia	Record daily precipitation	18.3 mm (0.7 in)	18 of 100 (Routine)
Armagh	United Kingdom	Record low minimum temperature	-0.7 C (30.7 F)	18 of 100 (Routine)
Winbar	Australia	Record daily precipitation	15.5 mm (0.6 in)	17 of 100 (Routine)
Albury	Australia	Record daily precipitation	20.3 mm (0.8 in)	17 of 100 (Routine)
Round Hill	Australia	Record daily precipitation	16.0 mm (0.6 in)	17 of 100 (Routine)
Noorong	Australia	Record daily precipitation	14.2 mm (0.6 in)	17 of 100 (Routine)
Hamilton	Australia	Record daily precipitation	9.9 mm (0.39 in)	17 of 100 (Routine)
Wentworth Post Office	Australia	Record daily precipitation	13.7 mm (0.5 in)	16 of 100 (Routine)
Bathurst Gaol	Australia	Record high minimum temperature	12.2 C (54.0 F)	16 of 100 (Routine)
Dublin Phoenix Park	Ireland	Record low maximum temperature	8.9 C (48.0 F)	16 of 100 (Routine)

Counts by Type and Timescale

89 records

Records set or tied on 15 May 1909 by type: Lowest daily maximum 9, Highest daily minimum 5, Lowest daily minimum 5, Heaviest daily rainfall 70.

Records on 15 May 1909 by type
Record type	Records
Highest daily maximum	0
Lowest daily maximum	9
Highest daily minimum	5
Lowest daily minimum	5
Heaviest daily rainfall	70
Heaviest daily snowfall	0
Deepest snow cover	0

Records on 15 May 1909 by timescale: all-time 0, monthly 2, daily 87.

How Much Records Were Beaten By

88 broken records

Margins by which the 88 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 41.9. Ties are not counted.

Top 20 by Significance

15 May 1909

Top 20 records on 15 May 1909 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 May 1909	Mount Gambier Post Office, AU	monthly rain	68.6 mm (2.7 in)	24.4 mm (1.0 in)	43 years	64 of 100 (Major)
15 May 1909	Bendigo Prison, AU	daily rain	33.0 mm (1.3 in)	26.6 mm (1.0 in)	43 years	53 of 100 (Notable)
15 May 1909	Cape Northumberland, AU	daily rain	40.9 mm (1.6 in)	29.0 mm (1.1 in)	27 years	52 of 100 (Notable)
15 May 1909	Wangaratta, AU	daily rain	46.0 mm (1.8 in)	41.9 mm (1.6 in)	24 years	50 of 100 (Notable)
15 May 1909	Smeaton Weir, AU	daily rain	33.8 mm (1.3 in)	29.0 mm (1.1 in)	26 years	50 of 100 (Notable)
15 May 1909	Daylesford, AU	daily rain	51.6 mm (2.0 in)	40.9 mm (1.6 in)	20 years	50 of 100 (Notable)
15 May 1909	Kyneton Post Office, AU	daily rain	41.9 mm (1.6 in)	37.6 mm (1.5 in)	24 years	50 of 100 (Notable)
15 May 1909	Newlyn Reservoir, AU	daily rain	46.5 mm (1.8 in)	38.1 mm (1.5 in)	24 years	50 of 100 (Notable)
15 May 1909	Castlemaine, AU	daily rain	28.2 mm (1.1 in)	26.4 mm (1.0 in)	26 years	48 of 100 (Notable)
15 May 1909	Collendina, AU	daily rain	35.8 mm (1.4 in)	32.2 mm (1.3 in)	24 years	47 of 100 (Notable)
15 May 1909	Ballan, AU	daily rain	29.7 mm (1.2 in)	22.6 mm (0.9 in)	25 years	46 of 100 (Notable)
15 May 1909	Goulburn River @ Shepparton, AU	daily rain	33.3 mm (1.3 in)	30.0 mm (1.2 in)	0 years	43 of 100 (Notable)
15 May 1909	Maryborough, AU	daily rain	25.1 mm (1.0 in)	23.1 mm (0.9 in)	26 years	43 of 100 (Notable)
15 May 1909	Clunes, AU	daily rain	25.4 mm (1.0 in)	24.1 mm (0.9 in)	21 years	42 of 100 (Notable)
15 May 1909	Roto (Coombie), AU	daily rain	38.1 mm (1.5 in)	33.3 mm (1.3 in)	23 years	41 of 100 (Notable)
15 May 1909	Blackwood, AU	daily rain	39.1 mm (1.5 in)	26.4 mm (1.0 in)	23 years	39 of 100 (Notable)
15 May 1909	Jerilderie (Yanko Station), AU	daily rain	25.4 mm (1.0 in)	20.3 mm (0.8 in)	39 years	37 of 100 (Notable)
15 May 1909	Maldon (Derby Hill), AU	daily rain	34.3 mm (1.4 in)	22.1 mm (0.9 in)	10 years	34 of 100 (Routine)
15 May 1909	Benerembah, AU	daily rain	26.7 mm (1.1 in)	26.4 mm (1.0 in)	0 years	31 of 100 (Routine)
15 May 1909	Kaarimba, AU	monthly rain	45.5 mm (1.8 in)	10.7 mm (0.4 in)	2 years	27 of 100 (Routine)

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

1820 to 1909

Records set or tied on this calendar date in each year from 1820 to 1909. 1909 had 89 records.

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

Records on 05-15 in each year
Year	Records
1820	1
1825	1
1831	1
1832	1
1837	2
1845	1
1847	2
1848	1
1855	2
1857	2
1859	1
1862	1
1863	1
1865	1
1866	2
1867	1
1868	2
1870	1
1871	3
1874	2
1876	4
1878	1
1879	2
1881	1
1883	1
1885	1
1886	2
1888	3
1891	3
1893	5
1894	2
1895	4
1896	2
1897	4
1898	3
1899	9
1900	9
1901	2
1902	9
1903	4
1904	13
1905	16
1906	10
1907	27
1908	25
1909	89
1910	27
1911	27
1912	26
1913	60
1914	16
1915	236
1916	27
1917	80
1918	133
1919	25
1920	58
1921	92
1922	30
1923	125
1924	174
1925	100
1926	161
1927	191
1928	144
1929	161
1930	136
1931	459
1932	368
1933	439
1934	227
1935	288
1936	372
1937	373
1938	393
1939	351
1940	179
1941	454
1942	701
1943	568
1944	630
1945	588
1946	238
1947	334
1948	264
1949	363
1950	260
1951	736
1952	476
1953	426
1954	355
1955	538
1956	466
1957	521
1958	605
1959	764
1960	291
1961	508
1962	1,128
1963	782
1964	347
1965	320
1966	389
1967	609
1968	1,019
1969	790
1970	512
1971	351
1972	484
1973	818
1974	1,230
1975	372
1976	803
1977	1,186
1978	922
1979	404
1980	625
1981	586
1982	500
1983	1,215
1984	1,059
1985	649
1986	679
1987	1,073
1988	643
1989	552
1990	776
1991	1,179
1992	944
1993	784
1994	910
1995	1,750
1996	1,452
1997	1,175
1998	1,641
1999	810
2000	850
2001	1,280
2002	801
2003	1,023
2004	1,046
2005	767
2006	955
2007	949
2008	995
2009	675
2010	1,088
2011	1,298
2012	751
2013	1,081
2014	1,411
2015	717
2016	890
2017	435
2018	1,074
2019	627
2020	472
2021	412
2022	847
2023	566
2024	596
2025	801
2026	481

Download the Data

Data for records on 1909-05-15: 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 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Histogram of margins by which records were beaten on 15 May 1909
Margin	Records
0 to 10	47
10 to 20	22
20 to 30	12
30 to 40	5
40 to 50	2