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Weather Records on 21 April 1909

20 weather records were set or tied worldwide on 21 April 1909. Highest significance: Yamba Pilot Station, AU.

Key Facts for 21 April 1909

  • On 21 April 1909, 20 weather records were set or tied at long-record stations worldwide.
  • 4 were record highs and 7 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 20 daily.
  • Yamba Pilot Station set a daily record precipitation of 89.4 mm (3.5 in) on 21 April 1909.
  • Across 158 earlier years (1793 to 2025) the same calendar date averaged 463 records.

Record Map

20 stations
Weather records on 21 April 1909 20 station records on 21 April 1909 are marked on the map, coloured by record type.
20 station records on 21 April 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 21 April 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
Yamba Pilot StationAustraliaRecord daily precipitation89.4 mm (3.5 in)31 of 100 (Routine)
Milwaukee Wb CityUnited StatesRecord daily precipitation15.5 mm (0.6 in)19 of 100 (Routine)
Berlin-DahlemGermanyRecord daily precipitation10.4 mm (0.4 in)18 of 100 (Routine)
GravenhurstCanadaRecord daily precipitation13.0 mm (0.5 in)17 of 100 (Routine)
Olympia Priest Pt ParkUnited StatesRecord low minimum temperature-2.2 C (28.0 F)17 of 100 (Routine)
MilanItalyRecord high maximum temperature27.2 C (81.0 F)15 of 100 (Routine)
Wilmington Wb CityUnited StatesRecord high minimum temperature20.0 C (68.0 F)15 of 100 (Routine)
Madison Wb CityUnited StatesRecord daily precipitation18.5 mm (0.7 in)15 of 100 (Routine)
Winnemucca APUnited StatesRecord daily snowfall0.8 cm (0.3 in)15 of 100 (Routine)
Chattanooga Wb CityUnited StatesRecord high minimum temperature18.9 C (66.0 F)12 of 100 (Routine)
Emmaville (Strathbogie)AustraliaRecord daily precipitation38.1 mm (1.5 in)10 of 100 (Routine)
BoolcarrolAustraliaRecord daily precipitation5.3 mm (0.21 in)9 of 100 (Routine)
Bourke Post OfficeAustraliaRecord low minimum temperature3.9 C (39.0 F)8 of 100 (Routine)
Philadelphia CityUnited StatesRecord daily precipitation13.0 mm (0.5 in)8 of 100 (Routine)
Bourke Post OfficeAustraliaRecord low maximum temperature21.9 C (71.4 F)7 of 100 (Routine)
Wagga Wagga (Kooringal)AustraliaRecord low minimum temperature1.7 C (35.1 F)6 of 100 (Routine)
Alice Springs Post OfficeAustraliaRecord low maximum temperature19.0 C (66.2 F)4 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord high minimum temperature20.6 C (69.1 F)3 of 100 (Routine)
StonecliffeCanadaRecord low maximum temperature5.6 C (42.1 F)2 of 100 (Routine)
Cape Otway LighthouseAustraliaRecord low maximum temperature13.3 C (55.9 F)1 of 100 (Routine)

Counts by Type and Timescale

20 records
Records on 21 April 1909 by type Records set or tied on 21 April 1909 by type: Highest daily maximum 1, Lowest daily maximum 4, Highest daily minimum 3, Lowest daily minimum 3, Heaviest daily rainfall 8, Heaviest daily snowfall 1. 02468Highest daily maximum: 1Lowest daily maximum: 4Highest daily minimum: 3Lowest daily minimum: 3Heaviest daily rainfall: 8Heaviest daily snowfall: 1Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 21 April 1909 by type: Highest daily maximum 1, Lowest daily maximum 4, Highest daily minimum 3, Lowest daily minimum 3, Heaviest daily rainfall 8, Heaviest daily snowfall 1.
Records on 21 April 1909 by type
Record typeRecords
Highest daily maximum1
Lowest daily maximum4
Highest daily minimum3
Lowest daily minimum3
Heaviest daily rainfall8
Heaviest daily snowfall1
Deepest snow cover0
Records on 21 April 1909 by timescale Records on 21 April 1909 by timescale: all-time 0, monthly 0, daily 20. 05101520all-time: 0monthly: 0daily: 20all-timemonthlydaily
Records on 21 April 1909 by timescale: all-time 0, monthly 0, daily 20.
Records on 21 April 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily20

How Much Records Were Beaten By

17 broken records
Histogram of margins by which records were beaten on 21 April 1909 Margins by which the 17 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 36.1. Ties are not counted. 0510150 to 5: 145 to 10: 210 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 17 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 36.1. Ties are not counted.
Histogram of margins by which records were beaten on 21 April 1909
MarginRecords
0 to 514
5 to 102
10 to 150
15 to 200
20 to 250
25 to 300
30 to 350
35 to 401

Top 20 by Significance

21 April 1909
Top 20 records on 21 April 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
21 April 1909Yamba Pilot Station, AUdaily rain89.4 mm (3.5 in)36.1 mm (1.4 in)16 years31 of 100 (Routine)
21 April 1909Milwaukee Wb City, USdaily rain15.5 mm (0.6 in)4.8 mm (0.19 in)36 years19 of 100 (Routine)
21 April 1909Berlin-Dahlem, DEdaily rain10.4 mm (0.4 in)4.9 mm (0.19 in)17 years18 of 100 (Routine)
21 April 1909Gravenhurst, CAdaily rain13.0 mm (0.5 in)1.3 mm (0.05 in)36 years17 of 100 (Routine)
21 April 1909Olympia Priest Pt Park, USdaily low min-2.2 C (28.0 F)2.8 C (5.0 F)18 years17 of 100 (Routine)
21 April 1909Milan, ITdaily high max27.2 C (81.0 F)0.4 C (0.7 F)15 years15 of 100 (Routine)
21 April 1909Wilmington Wb City, USdaily high min20.0 C (68.0 F)1.7 C (3.1 F)30 years15 of 100 (Routine)
21 April 1909Madison Wb City, USdaily rain18.5 mm (0.7 in)5.3 mm (0.21 in)17 years15 of 100 (Routine)
21 April 1909Winnemucca AP, USdaily snowfall0.8 cm (0.3 in)0.8 cm (0.3 in)30 years15 of 100 (Routine)
21 April 1909Chattanooga Wb City, USdaily high min18.9 C (66.0 F)2.2 C (4.0 F)17 years12 of 100 (Routine)
21 April 1909Emmaville (Strathbogie), AUdaily rain38.1 mm (1.5 in)4.3 mm (0.17 in)16 years10 of 100 (Routine)
21 April 1909Boolcarrol, AUdaily rain5.3 mm (0.21 in)0.7 mm (0.03 in)22 years9 of 100 (Routine)
21 April 1909Bourke Post Office, AUdaily low min3.9 C (39.0 F)2.2 C (4.0 F)2 years8 of 100 (Routine)
21 April 1909Philadelphia City, USdaily rain13.0 mm (0.5 in)0.3 mm (0.01 in)16 years8 of 100 (Routine)
21 April 1909Bourke Post Office, AUdaily low max21.9 C (71.4 F)0.3 C (0.5 F)14 years7 of 100 (Routine)
21 April 1909Wagga Wagga (Kooringal), AUdaily low min1.7 C (35.1 F)0.2 C (0.4 F)10 years6 of 100 (Routine)
21 April 1909Alice Springs Post Office, AUdaily low max19.0 C (66.2 F)0.8 C (1.4 F)0 years4 of 100 (Routine)
21 April 1909Jacksonville Wb City, USdaily high min (Tie)20.6 C (69.1 F)tie34 years3 of 100 (Routine)
21 April 1909Stonecliffe, CAdaily low max (Tie)5.6 C (42.1 F)tie26 years2 of 100 (Routine)
21 April 1909Cape Otway Lighthouse, AUdaily low max (Tie)13.3 C (55.9 F)tie4 years1 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

1793 to 1909
Records on 04-21 in each year Records set or tied on this calendar date in each year from 1793 to 1909. 1909 had 20 records. 05001,0001,5002,0001793: 11814: 11820: 11838: 11849: 21851: 11852: 31854: 11858: 31861: 21865: 31866: 11868: 11870: 11875: 41876: 21877: 11879: 31880: 11881: 11882: 11884: 11885: 21888: 11890: 11891: 11892: 11893: 21894: 41895: 11897: 11898: 21899: 21900: 71901: 171902: 71903: 31904: 101905: 181906: 51907: 171908: 251909: 201910: 331911: 91912: 221913: 141914: 2201915: 241916: 641917: 481918: 841919: 311920: 851921: 591922: 701923: 2231924: 1191925: 2951926: 1481927: 2841928: 2691929: 1931930: 1271931: 3581932: 3041933: 2011934: 4971935: 2661936: 2771937: 4161938: 2951939: 1101940: 4621941: 3061942: 2851943: 4811944: 2611945: 3671946: 4481947: 4591948: 3651949: 4481950: 5291951: 8841952: 6651953: 6401954: 5271955: 6071956: 4971957: 8241958: 3291959: 5051960: 8891961: 6471962: 3191963: 7781964: 1,1251965: 6581966: 7561967: 9031968: 6551969: 3881970: 7281971: 5461972: 5931973: 1,1631974: 5281975: 3601976: 4521977: 8541978: 7351979: 4491980: 1,9341981: 9441982: 1,0751983: 1,3661984: 1,2311985: 1,2451986: 9771987: 1,2901988: 8981989: 1,5571990: 1,4631991: 1,2911992: 1,7631993: 8471994: 8591995: 1,4761996: 7881997: 9641998: 8761999: 7522000: 9212001: 9672002: 1,3122003: 6072004: 5862005: 6932006: 7612007: 4802008: 1,3272009: 9832010: 8052011: 1,0532012: 6872013: 1,0152014: 3932015: 6212016: 5872017: 7972018: 8622019: 7302020: 3942021: 1,6002022: 4312023: 8852024: 7542025: 5061793187718991915193119471963197919952011
Records set or tied on this calendar date in each year from 1793 to 1909. 1909 had 20 records.
Counts for years before the ledger starts come from the same station rules.
Records on 04-21 in each year
YearRecords
17931
18141
18201
18381
18492
18511
18523
18541
18583
18612
18653
18661
18681
18701
18754
18762
18771
18793
18801
18811
18821
18841
18852
18881
18901
18911
18921
18932
18944
18951
18971
18982
18992
19007
190117
19027
19033
190410
190518
19065
190717
190825
190920
191033
19119
191222
191314
1914220
191524
191664
191748
191884
191931
192085
192159
192270
1923223
1924119
1925295
1926148
1927284
1928269
1929193
1930127
1931358
1932304
1933201
1934497
1935266
1936277
1937416
1938295
1939110
1940462
1941306
1942285
1943481
1944261
1945367
1946448
1947459
1948365
1949448
1950529
1951884
1952665
1953640
1954527
1955607
1956497
1957824
1958329
1959505
1960889
1961647
1962319
1963778
19641,125
1965658
1966756
1967903
1968655
1969388
1970728
1971546
1972593
19731,163
1974528
1975360
1976452
1977854
1978735
1979449
19801,934
1981944
19821,075
19831,366
19841,231
19851,245
1986977
19871,290
1988898
19891,557
19901,463
19911,291
19921,763
1993847
1994859
19951,476
1996788
1997964
1998876
1999752
2000921
2001967
20021,312
2003607
2004586
2005693
2006761
2007480
20081,327
2009983
2010805
20111,053
2012687
20131,015
2014393
2015621
2016587
2017797
2018862
2019730
2020394
20211,600
2022431
2023885
2024754
2025506

Download the Data

  • Data for records on 1909-04-21: 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).