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Weather Records on 21 September 1909

10 weather records were set or tied worldwide on 21 September 1909. Highest significance: Stratford, AU.

Key Facts for 21 September 1909

  • On 21 September 1909, 10 weather records were set or tied at long-record stations worldwide.
  • 1 were record highs and 2 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 10 daily.
  • Stratford set a daily record precipitation of 31.2 mm (1.2 in) on 21 September 1909.
  • Across 154 earlier years (1805 to 2025) the same calendar date averaged 454 records.

Record Map

10 stations
Weather records on 21 September 1909 10 station records on 21 September 1909 are marked on the map, coloured by record type.
10 station records on 21 September 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 21 September 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
StratfordAustraliaRecord daily precipitation31.2 mm (1.2 in)38 of 100 (Notable)
Milwaukee Wb CityUnited StatesRecord daily precipitation33.0 mm (1.3 in)28 of 100 (Routine)
RosedaleAustraliaRecord daily precipitation19.1 mm (0.8 in)20 of 100 (Routine)
Urana Post OfficeAustraliaRecord daily precipitation13.5 mm (0.5 in)20 of 100 (Routine)
Wagga Wagga (Kooringal)AustraliaRecord low maximum temperature12.2 C (54.0 F)20 of 100 (Routine)
Port ArthurCanadaRecord daily precipitation29.7 mm (1.2 in)20 of 100 (Routine)
San Diego WboUnited StatesRecord low maximum temperature18.9 C (66.0 F)12 of 100 (Routine)
Bairnsdale 1AustraliaRecord daily precipitation15.0 mm (0.6 in)11 of 100 (Routine)
Omeo ComparisonAustraliaRecord daily precipitation9.1 mm (0.36 in)10 of 100 (Routine)
Montgomery Wb CityUnited StatesRecord high minimum temperature22.8 C (73.0 F)1 of 100 (Routine)

Counts by Type and Timescale

10 records
Records on 21 September 1909 by type Records set or tied on 21 September 1909 by type: Lowest daily maximum 2, Highest daily minimum 1, Heaviest daily rainfall 7. 02468Highest daily maximum: 0Lowest daily maximum: 2Highest daily minimum: 1Lowest daily minimum: 0Heaviest daily rainfall: 7Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 21 September 1909 by type: Lowest daily maximum 2, Highest daily minimum 1, Heaviest daily rainfall 7.
Records on 21 September 1909 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum2
Highest daily minimum1
Lowest daily minimum0
Heaviest daily rainfall7
Heaviest daily snowfall0
Deepest snow cover0
Records on 21 September 1909 by timescale Records on 21 September 1909 by timescale: all-time 0, monthly 0, daily 10. 035810all-time: 0monthly: 0daily: 10all-timemonthlydaily
Records on 21 September 1909 by timescale: all-time 0, monthly 0, daily 10.
Records on 21 September 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 21 September 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 23.9. Ties are not counted. 012340 to 5: 45 to 10: 110 to 15: 215 to 20: 020 to 25: 20 to 55 to 1010 to 1515 to 2020 to 25
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 23.9. Ties are not counted.
Histogram of margins by which records were beaten on 21 September 1909
MarginRecords
0 to 54
5 to 101
10 to 152
15 to 200
20 to 252

Top 20 by Significance

21 September 1909
Top 10 records on 21 September 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
21 September 1909Stratford, AUdaily rain31.2 mm (1.2 in)23.8 mm (0.9 in)22 years38 of 100 (Notable)
21 September 1909Milwaukee Wb City, USdaily rain33.0 mm (1.3 in)23.9 mm (0.9 in)15 years28 of 100 (Routine)
21 September 1909Rosedale, AUdaily rain19.1 mm (0.8 in)13.0 mm (0.5 in)28 years20 of 100 (Routine)
21 September 1909Urana Post Office, AUdaily rain13.5 mm (0.5 in)6.6 mm (0.26 in)36 years20 of 100 (Routine)
21 September 1909Wagga Wagga (Kooringal), AUdaily low max12.2 C (54.0 F)2.8 C (5.0 F)36 years20 of 100 (Routine)
21 September 1909Port Arthur, CAdaily rain29.7 mm (1.2 in)13.4 mm (0.5 in)15 years20 of 100 (Routine)
21 September 1909San Diego Wbo, USdaily low max18.9 C (66.0 F)0.5 C (0.9 F)28 years12 of 100 (Routine)
21 September 1909Bairnsdale 1, AUdaily rain15.0 mm (0.6 in)2.6 mm (0.10 in)16 years11 of 100 (Routine)
21 September 1909Omeo Comparison, AUdaily rain9.1 mm (0.36 in)1.0 mm (0.04 in)20 years10 of 100 (Routine)
21 September 1909Montgomery Wb City, USdaily high min (Tie)22.8 C (73.0 F)tie13 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

1805 to 1909
Records on 09-21 in each year Records set or tied on this calendar date in each year from 1805 to 1909. 1909 had 10 records. 01,0002,0003,0001805: 11812: 11825: 21840: 11841: 11842: 11848: 11854: 11856: 21868: 11872: 21873: 11877: 11878: 11881: 11882: 11884: 11886: 11888: 21889: 11891: 101892: 11893: 101894: 21895: 31896: 21897: 61898: 61899: 31900: 21901: 51902: 51903: 81904: 201905: 121906: 171907: 101908: 171909: 101910: 81911: 181912: 261913: 371914: 291915: 341916: 481917: 281918: 431919: 541920: 291921: 641922: 351923: 2321924: 2911925: 2781926: 1781927: 1651928: 811929: 2321930: 821931: 6811932: 2421933: 1931934: 4921935: 1991936: 3291937: 4871938: 5081939: 3081940: 9081941: 4161942: 2911943: 4071944: 4131945: 5071946: 1761947: 5341948: 3011949: 2981950: 3341951: 2411952: 4301953: 3821954: 4531955: 7521956: 1,1001957: 3661958: 5881959: 5131960: 4181961: 4411962: 1,0851963: 3061964: 3741965: 1,0881966: 5651967: 5771968: 7901969: 5931970: 7081971: 6451972: 5991973: 4211974: 6521975: 5281976: 6941977: 9181978: 8181979: 7361980: 9901981: 6961982: 1,4841983: 2,2071984: 7071985: 7961986: 6711987: 9651988: 5571989: 1,0021990: 7161991: 1,0211992: 7521993: 9111994: 7131995: 2,0021996: 1,2331997: 1,1121998: 1,4811999: 1,0252000: 8842001: 7182002: 6962003: 9592004: 8882005: 1,1432006: 9202007: 7422008: 7402009: 7152010: 1,2902011: 5422012: 5952013: 7692014: 7162015: 5652016: 9892017: 1,1782018: 1,0442019: 8302020: 5792021: 4642022: 1,0472023: 7822024: 4702025: 5911805188419031919193519511967198319992015
Records set or tied on this calendar date in each year from 1805 to 1909. 1909 had 10 records.
Counts for years before the ledger starts come from the same station rules.
Records on 09-21 in each year
YearRecords
18051
18121
18252
18401
18411
18421
18481
18541
18562
18681
18722
18731
18771
18781
18811
18821
18841
18861
18882
18891
189110
18921
189310
18942
18953
18962
18976
18986
18993
19002
19015
19025
19038
190420
190512
190617
190710
190817
190910
19108
191118
191226
191337
191429
191534
191648
191728
191843
191954
192029
192164
192235
1923232
1924291
1925278
1926178
1927165
192881
1929232
193082
1931681
1932242
1933193
1934492
1935199
1936329
1937487
1938508
1939308
1940908
1941416
1942291
1943407
1944413
1945507
1946176
1947534
1948301
1949298
1950334
1951241
1952430
1953382
1954453
1955752
19561,100
1957366
1958588
1959513
1960418
1961441
19621,085
1963306
1964374
19651,088
1966565
1967577
1968790
1969593
1970708
1971645
1972599
1973421
1974652
1975528
1976694
1977918
1978818
1979736
1980990
1981696
19821,484
19832,207
1984707
1985796
1986671
1987965
1988557
19891,002
1990716
19911,021
1992752
1993911
1994713
19952,002
19961,233
19971,112
19981,481
19991,025
2000884
2001718
2002696
2003959
2004888
20051,143
2006920
2007742
2008740
2009715
20101,290
2011542
2012595
2013769
2014716
2015565
2016989
20171,178
20181,044
2019830
2020579
2021464
20221,047
2023782
2024470
2025591

Download the Data

  • Data for records on 1909-09-21: 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).