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Weather Records on 21 December 1909

20 weather records were set or tied worldwide on 21 December 1909. Highest significance: Parry Sound, CA.

Key Facts for 21 December 1909

  • On 21 December 1909, 20 weather records were set or tied at long-record stations worldwide.
  • 6 were record highs and 4 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 2 monthly and 18 daily.
  • Parry Sound set a daily record snowfall of 25.4 cm (10.0 in) on 21 December 1909.
  • Across 158 earlier years (1793 to 2025) the same calendar date averaged 492 records.

Record Map

20 stations
Weather records on 21 December 1909 20 station records on 21 December 1909 are marked on the map, coloured by record type.
20 station records on 21 December 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 21 December 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
Parry SoundCanadaRecord daily snowfall25.4 cm (10.0 in)28 of 100 (Routine)
CharlottetownCanadaRecord daily snowfall10.2 cm (4.0 in)21 of 100 (Routine)
ChathamCanadaRecord daily snowfall15.2 cm (6.0 in)20 of 100 (Routine)
Olympia Priest Pt ParkUnited StatesRecord low minimum temperature-7.2 C (19.0 F)16 of 100 (Routine)
Oran-Hopital MilitaireAlgeriaRecord high maximum temperature19.0 C (66.2 F)15 of 100 (Routine)
Forbes (Camp Street)AustraliaRecord high minimum temperature25.3 C (77.5 F)15 of 100 (Routine)
Munchen-NymphenburgGermanyRecord daily precipitation17.4 mm (0.7 in)15 of 100 (Routine)
Parry SoundCanadaRecord daily precipitation25.4 mm (1.0 in)14 of 100 (Routine)
St John'sCanadaRecord high minimum temperature2.2 C (36.0 F)14 of 100 (Routine)
Dublin Phoenix ParkIrelandRecord daily precipitation14.0 mm (0.6 in)14 of 100 (Routine)
ArmaghUnited KingdomRecord low minimum temperature-10.3 C (13.5 F)14 of 100 (Routine)
Deniliquin (Wilkinson St)AustraliaRecord high minimum temperature22.2 C (72.0 F)11 of 100 (Routine)
DalhousieCanadaRecord daily snowfall20.3 cm (8.0 in)11 of 100 (Routine)
Dublin Phoenix ParkIrelandRecord low minimum temperature-1.2 C (29.8 F)11 of 100 (Routine)
Mount ButeAustraliaRecord daily precipitation6.1 mm (0.24 in)10 of 100 (Routine)
SydneyCanadaRecord high minimum temperature1.1 C (34.0 F)9 of 100 (Routine)
Oksoey FyrNorwayRecord daily precipitation13.4 mm (0.5 in)5 of 100 (Routine)
Wagga Wagga (Kooringal)AustraliaRecord high minimum temperature27.2 C (81.0 F)4 of 100 (Routine)
ChathamCanadaRecord daily precipitation17.0 mm (0.7 in)3 of 100 (Routine)
GalwayIrelandRecord low minimum temperature-8.9 C (16.0 F)3 of 100 (Routine)

Counts by Type and Timescale

20 records
Records on 21 December 1909 by type Records set or tied on 21 December 1909 by type: Highest daily maximum 1, Highest daily minimum 5, Lowest daily minimum 4, Heaviest daily rainfall 6, Heaviest daily snowfall 4. 0246Highest daily maximum: 1Lowest daily maximum: 0Highest daily minimum: 5Lowest daily minimum: 4Heaviest daily rainfall: 6Heaviest daily snowfall: 4Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 21 December 1909 by type: Highest daily maximum 1, Highest daily minimum 5, Lowest daily minimum 4, Heaviest daily rainfall 6, Heaviest daily snowfall 4.
Records on 21 December 1909 by type
Record typeRecords
Highest daily maximum1
Lowest daily maximum0
Highest daily minimum5
Lowest daily minimum4
Heaviest daily rainfall6
Heaviest daily snowfall4
Deepest snow cover0
Records on 21 December 1909 by timescale Records on 21 December 1909 by timescale: all-time 0, monthly 2, daily 18. 05101520all-time: 0monthly: 2daily: 18all-timemonthlydaily
Records on 21 December 1909 by timescale: all-time 0, monthly 2, daily 18.
Records on 21 December 1909 by timescale
TimescaleRecords
all-time0
monthly2
daily18

How Much Records Were Beaten By

18 broken records
Histogram of margins by which records were beaten on 21 December 1909 Margins by which the 18 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted. 0510150 to 20: 1420 to 40: 140 to 60: 060 to 80: 280 to 100: 0100 to 120: 0120 to 140: 10 to 2020 to 4040 to 6060 to 8080 to 100100 to 120120 to 140
Margins by which the 18 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 127.0. Ties are not counted.
Histogram of margins by which records were beaten on 21 December 1909
MarginRecords
0 to 2014
20 to 401
40 to 600
60 to 802
80 to 1000
100 to 1200
120 to 1401

Top 20 by Significance

21 December 1909
Top 20 records on 21 December 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
21 December 1909Parry Sound, CAdaily snowfall25.4 cm (10.0 in)12.7 cm (5.0 in)8 years28 of 100 (Routine)
21 December 1909Charlottetown, CAdaily snowfall10.2 cm (4.0 in)6.4 cm (2.5 in)25 years21 of 100 (Routine)
21 December 1909Chatham, CAdaily snowfall15.2 cm (6.0 in)6.8 cm (2.7 in)24 years20 of 100 (Routine)
21 December 1909Olympia Priest Pt Park, USdaily low min-7.2 C (19.0 F)2.2 C (4.0 F)24 years16 of 100 (Routine)
21 December 1909Oran-Hopital Militaire, DZdaily high max19.0 C (66.2 F)1.0 C (1.8 F)22 years15 of 100 (Routine)
21 December 1909Forbes (Camp Street), AUdaily high min25.3 C (77.5 F)1.4 C (2.5 F)30 years15 of 100 (Routine)
21 December 1909Munchen-Nymphenburg, DEdaily rain17.4 mm (0.7 in)3.3 mm (0.13 in)22 years15 of 100 (Routine)
21 December 1909Parry Sound, CAdaily rain25.4 mm (1.0 in)5.6 mm (0.22 in)7 years14 of 100 (Routine)
21 December 1909St John's, CAdaily high min2.2 C (36.0 F)2.2 C (4.0 F)23 years14 of 100 (Routine)
21 December 1909Dublin Phoenix Park, IEdaily rain14.0 mm (0.6 in)0.3 mm (0.01 in)33 years14 of 100 (Routine)
21 December 1909Armagh, GBdaily low min-10.3 C (13.5 F)1.4 C (2.5 F)18 years14 of 100 (Routine)
21 December 1909Deniliquin (Wilkinson St), AUdaily high min22.2 C (72.0 F)1.9 C (3.4 F)10 years11 of 100 (Routine)
21 December 1909Dalhousie, CAdaily snowfall20.3 cm (8.0 in)2.5 cm (1.0 in)19 years11 of 100 (Routine)
21 December 1909Dublin Phoenix Park, IEdaily low min-1.2 C (29.8 F)0.4 C (0.7 F)22 years11 of 100 (Routine)
21 December 1909Mount Bute, AUdaily rain6.1 mm (0.24 in)1.0 mm (0.04 in)20 years10 of 100 (Routine)
21 December 1909Sydney, CAdaily high min1.1 C (34.0 F)0.5 C (0.9 F)13 years9 of 100 (Routine)
21 December 1909Oksoey Fyr, NOdaily rain13.4 mm (0.5 in)1.8 mm (0.07 in)2 years5 of 100 (Routine)
21 December 1909Wagga Wagga (Kooringal), AUmonthly high min (Tie)27.2 C (81.0 F)tie12 years4 of 100 (Routine)
21 December 1909Chatham, CAdaily rain17.0 mm (0.7 in)0.5 mm (0.02 in)3 years3 of 100 (Routine)
21 December 1909Galway, IEmonthly low min (Tie)-8.9 C (16.0 F)tie2 years3 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 12-21 in each year Records set or tied on this calendar date in each year from 1793 to 1909. 1909 had 20 records. 01,0002,0003,0004,0001793: 11794: 11799: 11801: 21808: 31825: 11828: 11839: 11846: 11850: 11855: 71859: 11860: 11868: 11870: 11871: 21874: 21875: 31876: 11877: 11878: 11879: 11880: 11884: 11886: 31889: 11890: 41893: 41894: 11895: 51896: 31897: 31898: 11900: 81901: 151902: 51903: 251904: 31905: 151906: 151907: 171908: 191909: 201910: 291911: 361912: 231913: 111914: 1071915: 431916: 401917: 181918: 411919: 571920: 301921: 1041922: 341923: 3231924: 3771925: 1201926: 1781927: 1471928: 701929: 1561930: 661931: 5561932: 1501933: 5811934: 2301935: 3981936: 3231937: 1891938: 1451939: 1401940: 6221941: 6511942: 9681943: 1481944: 7621945: 3961946: 4951947: 7001948: 2971949: 1,2811950: 5041951: 1,0611952: 1971953: 2561954: 4441955: 8881956: 6721957: 8461958: 5161959: 2721960: 5851961: 2541962: 5631963: 1,1371964: 6131965: 2471966: 4001967: 1,9231968: 8181969: 8281970: 5471971: 6801972: 6511973: 1,2921974: 3741975: 5481976: 4461977: 4701978: 5171979: 5581980: 7261981: 1,4761982: 7021983: 3,3241984: 1,0121985: 9791986: 4041987: 7751988: 7171989: 3,2031990: 2,7011991: 1,1251992: 7511993: 9671994: 7931995: 8781996: 1,1141997: 8101998: 1,1421999: 8512000: 9442001: 6502002: 5792003: 1,1032004: 6752005: 6062006: 1,4432007: 9462008: 1,0622009: 1,0972010: 2,0392011: 6532012: 7592013: 1,0292014: 8782015: 1,1732016: 5432017: 4592018: 7382019: 7522020: 9632021: 3232022: 5282023: 1,1662024: 7792025: 1,1001793187418981915193119471963197919952011
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 12-21 in each year
YearRecords
17931
17941
17991
18012
18083
18251
18281
18391
18461
18501
18557
18591
18601
18681
18701
18712
18742
18753
18761
18771
18781
18791
18801
18841
18863
18891
18904
18934
18941
18955
18963
18973
18981
19008
190115
19025
190325
19043
190515
190615
190717
190819
190920
191029
191136
191223
191311
1914107
191543
191640
191718
191841
191957
192030
1921104
192234
1923323
1924377
1925120
1926178
1927147
192870
1929156
193066
1931556
1932150
1933581
1934230
1935398
1936323
1937189
1938145
1939140
1940622
1941651
1942968
1943148
1944762
1945396
1946495
1947700
1948297
19491,281
1950504
19511,061
1952197
1953256
1954444
1955888
1956672
1957846
1958516
1959272
1960585
1961254
1962563
19631,137
1964613
1965247
1966400
19671,923
1968818
1969828
1970547
1971680
1972651
19731,292
1974374
1975548
1976446
1977470
1978517
1979558
1980726
19811,476
1982702
19833,324
19841,012
1985979
1986404
1987775
1988717
19893,203
19902,701
19911,125
1992751
1993967
1994793
1995878
19961,114
1997810
19981,142
1999851
2000944
2001650
2002579
20031,103
2004675
2005606
20061,443
2007946
20081,062
20091,097
20102,039
2011653
2012759
20131,029
2014878
20151,173
2016543
2017459
2018738
2019752
2020963
2021323
2022528
20231,166
2024779
20251,100

Download the Data

  • Data for records on 1909-12-21: 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).