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Weather Records on 21 August 1909

17 weather records were set or tied worldwide on 21 August 1909. Highest significance: Eversleigh, AU.

Key Facts for 21 August 1909

  • On 21 August 1909, 17 weather records were set or tied at long-record stations worldwide.
  • 2 were record highs and 8 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 17 daily.
  • Eversleigh set a daily record precipitation of 32.3 mm (1.3 in) on 21 August 1909.
  • Across 164 earlier years (1800 to 2025) the same calendar date averaged 447 records.

Record Map

17 stations
Weather records on 21 August 1909 17 station records on 21 August 1909 are marked on the map, coloured by record type.
17 station records on 21 August 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 21 August 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
EversleighAustraliaRecord daily precipitation32.3 mm (1.3 in)34 of 100 (Routine)
Putten (Gld)NetherlandsRecord daily precipitation26.5 mm (1.0 in)34 of 100 (Routine)
Ilulissat (Jakobshavn)Greenland [Denmark]Record daily precipitation12.7 mm (0.5 in)20 of 100 (Routine)
Armidale (Radio Station 2Ad)AustraliaRecord daily precipitation22.6 mm (0.9 in)20 of 100 (Routine)
WarburtonAustraliaRecord daily precipitation21.1 mm (0.8 in)15 of 100 (Routine)
Olympia Priest Pt ParkUnited StatesRecord low minimum temperature3.3 C (37.9 F)15 of 100 (Routine)
Portland Rfc CityUnited StatesRecord low minimum temperature8.3 C (46.9 F)15 of 100 (Routine)
Goonoo Goonoo StationAustraliaRecord daily precipitation23.4 mm (0.9 in)14 of 100 (Routine)
Coonabarabran (Namoi Street)AustraliaRecord daily precipitation22.9 mm (0.9 in)14 of 100 (Routine)
TruroCanadaRecord high maximum temperature28.3 C (82.9 F)13 of 100 (Routine)
Owen SoundCanadaRecord low minimum temperature5.0 C (41.0 F)10 of 100 (Routine)
Winnipeg St Johns CollCanadaRecord high maximum temperature33.9 C (93.0 F)9 of 100 (Routine)
Kingston Queens UCanadaRecord low maximum temperature18.3 C (64.9 F)9 of 100 (Routine)
BuffaloUnited StatesRecord low maximum temperature18.3 C (64.9 F)8 of 100 (Routine)
BeatriceCanadaRecord low minimum temperature3.3 C (37.9 F)2 of 100 (Routine)
Toledo BladeUnited StatesRecord low maximum temperature20.6 C (69.1 F)1 of 100 (Routine)
Cleveland 2717 EuclidUnited StatesRecord low maximum temperature18.3 C (64.9 F)0 of 100 (Routine)

Counts by Type and Timescale

17 records
Records on 21 August 1909 by type Records set or tied on 21 August 1909 by type: Highest daily maximum 2, Lowest daily maximum 4, Lowest daily minimum 4, Heaviest daily rainfall 7. 02468Highest daily maximum: 2Lowest daily maximum: 4Highest daily minimum: 0Lowest daily minimum: 4Heaviest daily rainfall: 7Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 21 August 1909 by type: Highest daily maximum 2, Lowest daily maximum 4, Lowest daily minimum 4, Heaviest daily rainfall 7.
Records on 21 August 1909 by type
Record typeRecords
Highest daily maximum2
Lowest daily maximum4
Highest daily minimum0
Lowest daily minimum4
Heaviest daily rainfall7
Heaviest daily snowfall0
Deepest snow cover0
Records on 21 August 1909 by timescale Records on 21 August 1909 by timescale: all-time 0, monthly 0, daily 17. 05101520all-time: 0monthly: 0daily: 17all-timemonthlydaily
Records on 21 August 1909 by timescale: all-time 0, monthly 0, daily 17.
Records on 21 August 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily17

How Much Records Were Beaten By

14 broken records
Histogram of margins by which records were beaten on 21 August 1909 Margins by which the 14 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 17.8. Ties are not counted. 02460 to 3: 63 to 5: 25 to 8: 28 to 10: 110 to 13: 113 to 15: 015 to 18: 118 to 20: 10 to 33 to 55 to 88 to 1010 to 1313 to 1515 to 1818 to 20
Margins by which the 14 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 17.8. Ties are not counted.
Histogram of margins by which records were beaten on 21 August 1909
MarginRecords
0 to 36
3 to 52
5 to 82
8 to 101
10 to 131
13 to 150
15 to 181
18 to 201

Top 20 by Significance

21 August 1909
Top 17 records on 21 August 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
21 August 1909Eversleigh, AUdaily rain32.3 mm (1.3 in)17.8 mm (0.7 in)25 years34 of 100 (Routine)
21 August 1909Putten (Gld), NLdaily rain26.5 mm (1.0 in)15.3 mm (0.6 in)20 years34 of 100 (Routine)
21 August 1909Ilulissat (Jakobshavn), GLdaily rain12.7 mm (0.5 in)9.0 mm (0.35 in)4 years20 of 100 (Routine)
21 August 1909Armidale (Radio Station 2Ad), AUdaily rain22.6 mm (0.9 in)11.4 mm (0.4 in)7 years20 of 100 (Routine)
21 August 1909Warburton, AUdaily rain21.1 mm (0.8 in)3.8 mm (0.15 in)28 years15 of 100 (Routine)
21 August 1909Olympia Priest Pt Park, USdaily low min3.3 C (37.9 F)2.8 C (5.0 F)7 years15 of 100 (Routine)
21 August 1909Portland Rfc City, USdaily low min8.3 C (46.9 F)1.7 C (3.1 F)19 years15 of 100 (Routine)
21 August 1909Goonoo Goonoo Station, AUdaily rain23.4 mm (0.9 in)5.4 mm (0.21 in)22 years14 of 100 (Routine)
21 August 1909Coonabarabran (Namoi Street), AUdaily rain22.9 mm (0.9 in)6.4 mm (0.25 in)22 years14 of 100 (Routine)
21 August 1909Truro, CAdaily high max28.3 C (82.9 F)1.1 C (2.0 F)24 years13 of 100 (Routine)
21 August 1909Owen Sound, CAdaily low min5.0 C (41.0 F)0.6 C (1.1 F)21 years10 of 100 (Routine)
21 August 1909Winnipeg St Johns Coll, CAdaily high max33.9 C (93.0 F)1.1 C (2.0 F)14 years9 of 100 (Routine)
21 August 1909Kingston Queens U, CAdaily low max18.3 C (64.9 F)0.6 C (1.1 F)14 years9 of 100 (Routine)
21 August 1909Buffalo, USdaily low max18.3 C (64.9 F)0.6 C (1.1 F)13 years8 of 100 (Routine)
21 August 1909Beatrice, CAdaily low min (Tie)3.3 C (37.9 F)tie21 years2 of 100 (Routine)
21 August 1909Toledo Blade, USdaily low max (Tie)20.6 C (69.1 F)tie14 years1 of 100 (Routine)
21 August 1909Cleveland 2717 Euclid, USdaily low max (Tie)18.3 C (64.9 F)tie2 years0 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

1800 to 1909
Records on 08-21 in each year Records set or tied on this calendar date in each year from 1800 to 1909. 1909 had 17 records. 05001,0001,5002,0001800: 11802: 11804: 11807: 11816: 11818: 11832: 11834: 11839: 31843: 11847: 11849: 31850: 11851: 21863: 11866: 11867: 21870: 31871: 21872: 11873: 11876: 11877: 21879: 21884: 21885: 51886: 11887: 51888: 21889: 31890: 41891: 21893: 41894: 81895: 31896: 21897: 41898: 41899: 71900: 41901: 91902: 81903: 61904: 81905: 41906: 221907: 201908: 131909: 171910: 331911: 191912: 501913: 371914: 241915: 211916: 1061917: 1011918: 2021919: 191920: 591921: 341922: 581923: 1111924: 1351925: 2201926: 2271927: 2281928: 1101929: 2341930: 2971931: 2771932: 2641933: 3281934: 3201935: 3181936: 8071937: 7621938: 2391939: 6301940: 6831941: 1801942: 4151943: 4381944: 3461945: 5441946: 3901947: 9541948: 3051949: 5081950: 9581951: 6991952: 3681953: 3311954: 4971955: 8851956: 7011957: 4901958: 3891959: 7041960: 4901961: 6441962: 4691963: 3381964: 7941965: 4551966: 6611967: 5411968: 1,0141969: 6501970: 3731971: 6601972: 4411973: 4381974: 5641975: 5451976: 7561977: 7641978: 4451979: 7781980: 9041981: 1,0151982: 7691983: 1,4071984: 9751985: 6231986: 1,1661987: 7401988: 8891989: 8281990: 9101991: 8281992: 9571993: 6981994: 9681995: 9621996: 9501997: 1,2911998: 9481999: 7172000: 8612001: 7972002: 9652003: 1,2412004: 1,5852005: 1,0712006: 7972007: 1,8292008: 1,0122009: 1,3192010: 1,1552011: 1,0222012: 9902013: 5132014: 6242015: 6512016: 8902017: 3472018: 8142019: 6252020: 1,1402021: 7602022: 9132023: 1,8142024: 7772025: 1,2321800187018951912192919461963198019972014
Records set or tied on this calendar date in each year from 1800 to 1909. 1909 had 17 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-21 in each year
YearRecords
18001
18021
18041
18071
18161
18181
18321
18341
18393
18431
18471
18493
18501
18512
18631
18661
18672
18703
18712
18721
18731
18761
18772
18792
18842
18855
18861
18875
18882
18893
18904
18912
18934
18948
18953
18962
18974
18984
18997
19004
19019
19028
19036
19048
19054
190622
190720
190813
190917
191033
191119
191250
191337
191424
191521
1916106
1917101
1918202
191919
192059
192134
192258
1923111
1924135
1925220
1926227
1927228
1928110
1929234
1930297
1931277
1932264
1933328
1934320
1935318
1936807
1937762
1938239
1939630
1940683
1941180
1942415
1943438
1944346
1945544
1946390
1947954
1948305
1949508
1950958
1951699
1952368
1953331
1954497
1955885
1956701
1957490
1958389
1959704
1960490
1961644
1962469
1963338
1964794
1965455
1966661
1967541
19681,014
1969650
1970373
1971660
1972441
1973438
1974564
1975545
1976756
1977764
1978445
1979778
1980904
19811,015
1982769
19831,407
1984975
1985623
19861,166
1987740
1988889
1989828
1990910
1991828
1992957
1993698
1994968
1995962
1996950
19971,291
1998948
1999717
2000861
2001797
2002965
20031,241
20041,585
20051,071
2006797
20071,829
20081,012
20091,319
20101,155
20111,022
2012990
2013513
2014624
2015651
2016890
2017347
2018814
2019625
20201,140
2021760
2022913
20231,814
2024777
20251,232

Download the Data

  • Data for records on 1909-08-21: 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 . Last revised (2025-12-31).