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Built 2026-10-19 (19 October 2026)

Weather Records on 20 May 1909

10 weather records were set or tied worldwide on 20 May 1909. Highest significance: Athens, US.

Key Facts for 20 May 1909

  • On 20 May 1909, 10 weather records were set or tied at long-record stations worldwide.
  • 0 were record highs and 5 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 10 daily.
  • Athens set a daily record precipitation of 59.2 mm (2.3 in) on 20 May 1909.
  • Across 162 earlier years (1802 to 2026) the same calendar date averaged 458 records.

Record Map

10 stations
Weather records on 20 May 1909 10 station records on 20 May 1909 are marked on the map, coloured by record type.
10 station records on 20 May 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 20 May 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
AthensUnited StatesRecord daily precipitation59.2 mm (2.3 in)36 of 100 (Notable)
Olympia Priest Pt ParkUnited StatesRecord low minimum temperature-0.6 C (30.9 F)15 of 100 (Routine)
Maitland WestAustraliaRecord daily precipitation8.4 mm (0.33 in)14 of 100 (Routine)
Melbourne Regional OfficeAustraliaRecord low maximum temperature10.3 C (50.5 F)14 of 100 (Routine)
Chattanooga Wb CityUnited StatesRecord daily precipitation18.3 mm (0.7 in)13 of 100 (Routine)
DalhousieCanadaRecord low minimum temperature-3.3 C (26.1 F)12 of 100 (Routine)
Atlantic City MarinaUnited StatesRecord low maximum temperature12.2 C (54.0 F)8 of 100 (Routine)
Wilmington Wb CityUnited StatesRecord daily precipitation36.6 mm (1.4 in)7 of 100 (Routine)
Wingen (Murrulla)AustraliaRecord daily precipitation5.6 mm (0.22 in)6 of 100 (Routine)
Wilmington Wb CityUnited StatesRecord low maximum temperature22.2 C (72.0 F)2 of 100 (Routine)

Counts by Type and Timescale

10 records
Records on 20 May 1909 by type Records set or tied on 20 May 1909 by type: Lowest daily maximum 3, Lowest daily minimum 2, Heaviest daily rainfall 5. 0246Highest daily maximum: 0Lowest daily maximum: 3Highest daily minimum: 0Lowest daily minimum: 2Heaviest daily rainfall: 5Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 20 May 1909 by type: Lowest daily maximum 3, Lowest daily minimum 2, Heaviest daily rainfall 5.
Records on 20 May 1909 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum3
Highest daily minimum0
Lowest daily minimum2
Heaviest daily rainfall5
Heaviest daily snowfall0
Deepest snow cover0
Records on 20 May 1909 by timescale Records on 20 May 1909 by timescale: all-time 0, monthly 0, daily 10. 035810all-time: 0monthly: 0daily: 10all-timemonthlydaily
Records on 20 May 1909 by timescale: all-time 0, monthly 0, daily 10.
Records on 20 May 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily10

How Much Records Were Beaten By

9 broken records
Histogram of margins by which records were beaten on 20 May 1909 Margins by which the 9 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.1. Ties are not counted. 024680 to 5: 85 to 10: 010 to 15: 015 to 20: 020 to 25: 025 to 30: 030 to 35: 035 to 40: 10 to 55 to 1010 to 1515 to 2020 to 2525 to 3030 to 3535 to 40
Margins by which the 9 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 35.1. Ties are not counted.
Histogram of margins by which records were beaten on 20 May 1909
MarginRecords
0 to 58
5 to 100
10 to 150
15 to 200
20 to 250
25 to 300
30 to 350
35 to 401

Top 20 by Significance

20 May 1909
Top 10 records on 20 May 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
20 May 1909Athens, USdaily rain59.2 mm (2.3 in)35.1 mm (1.4 in)23 years36 of 100 (Notable)
20 May 1909Olympia Priest Pt Park, USdaily low min-0.6 C (30.9 F)2.8 C (5.0 F)10 years15 of 100 (Routine)
20 May 1909Maitland West, AUdaily rain8.4 mm (0.33 in)0.5 mm (0.02 in)32 years14 of 100 (Routine)
20 May 1909Melbourne Regional Office, AUdaily low max10.3 C (50.5 F)1.4 C (2.5 F)16 years14 of 100 (Routine)
20 May 1909Chattanooga Wb City, USdaily rain18.3 mm (0.7 in)3.6 mm (0.14 in)28 years13 of 100 (Routine)
20 May 1909Dalhousie, CAdaily low min-3.3 C (26.1 F)1.6 C (2.9 F)17 years12 of 100 (Routine)
20 May 1909Atlantic City Marina, USdaily low max12.2 C (54.0 F)0.6 C (1.1 F)13 years8 of 100 (Routine)
20 May 1909Wilmington Wb City, USdaily rain36.6 mm (1.4 in)3.3 mm (0.13 in)8 years7 of 100 (Routine)
20 May 1909Wingen (Murrulla), AUdaily rain5.6 mm (0.22 in)3.6 mm (0.14 in)0 years6 of 100 (Routine)
20 May 1909Wilmington Wb City, USdaily low max (Tie)22.2 C (72.0 F)tie20 years2 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

1802 to 1909
Records on 05-20 in each year Records set or tied on this calendar date in each year from 1802 to 1909. 1909 had 10 records. 01,0002,0003,0001802: 11803: 11804: 11815: 11825: 11837: 11844: 11845: 31847: 11854: 11858: 31861: 11862: 11865: 11867: 11868: 21870: 31871: 21876: 21877: 31879: 11880: 21884: 21885: 11887: 21889: 31890: 31891: 51892: 31893: 11894: 61895: 31896: 31897: 31898: 41899: 41900: 11901: 51902: 111903: 191904: 41905: 41906: 221907: 351908: 231909: 101910: 201911: 821912: 201913: 101914: 161915: 421916: 291917: 461918: 921919: 561920: 441921: 2341922: 401923: 1251924: 1891925: 2511926: 1281927: 1181928: 1381929: 3231930: 1291931: 4511932: 6891933: 4491934: 5821935: 2591936: 2071937: 2701938: 3311939: 2661940: 3371941: 3781942: 3371943: 8021944: 3151945: 4981946: 3391947: 3581948: 5141949: 5861950: 3271951: 2881952: 6151953: 5181954: 8221955: 4211956: 5651957: 7281958: 3781959: 7851960: 6121961: 3331962: 7731963: 7321964: 5171965: 2001966: 4161967: 5871968: 7431969: 8851970: 3101971: 6531972: 6121973: 4191974: 8931975: 1,3321976: 8371977: 5531978: 5341979: 6831980: 7511981: 1,5401982: 5541983: 1,3071984: 8671985: 4261986: 7901987: 1,0361988: 8051989: 7641990: 7221991: 9251992: 1,2001993: 1,2081994: 7781995: 7341996: 1,7491997: 1,1061998: 1,1241999: 6732000: 9912001: 8472002: 2,2992003: 1,2012004: 7462005: 9292006: 1,0062007: 5652008: 9992009: 1,5292010: 1,0112011: 1,1172012: 6042013: 9192014: 6292015: 1,0012016: 6922017: 1,2142018: 4602019: 1,4832020: 7842021: 9042022: 1,6432023: 1,1062024: 4782025: 9692026: 6961802187118981915193219491966198320002017
Records set or tied on this calendar date in each year from 1802 to 1909. 1909 had 10 records.
Counts for years before the ledger starts come from the same station rules.
Records on 05-20 in each year
YearRecords
18021
18031
18041
18151
18251
18371
18441
18453
18471
18541
18583
18611
18621
18651
18671
18682
18703
18712
18762
18773
18791
18802
18842
18851
18872
18893
18903
18915
18923
18931
18946
18953
18963
18973
18984
18994
19001
19015
190211
190319
19044
19054
190622
190735
190823
190910
191020
191182
191220
191310
191416
191542
191629
191746
191892
191956
192044
1921234
192240
1923125
1924189
1925251
1926128
1927118
1928138
1929323
1930129
1931451
1932689
1933449
1934582
1935259
1936207
1937270
1938331
1939266
1940337
1941378
1942337
1943802
1944315
1945498
1946339
1947358
1948514
1949586
1950327
1951288
1952615
1953518
1954822
1955421
1956565
1957728
1958378
1959785
1960612
1961333
1962773
1963732
1964517
1965200
1966416
1967587
1968743
1969885
1970310
1971653
1972612
1973419
1974893
19751,332
1976837
1977553
1978534
1979683
1980751
19811,540
1982554
19831,307
1984867
1985426
1986790
19871,036
1988805
1989764
1990722
1991925
19921,200
19931,208
1994778
1995734
19961,749
19971,106
19981,124
1999673
2000991
2001847
20022,299
20031,201
2004746
2005929
20061,006
2007565
2008999
20091,529
20101,011
20111,117
2012604
2013919
2014629
20151,001
2016692
20171,214
2018460
20191,483
2020784
2021904
20221,643
20231,106
2024478
2025969
2026696

Download the Data

  • Data for records on 1909-05-20: 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 . Last revised (2026-10-15).