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Built 2026-10-17 (17 October 2026)

Weather Records on 21 September 1915

34 weather records were set or tied worldwide on 21 September 1915. Highest significance: Beechal, AU.

Key Facts for 21 September 1915

  • On 21 September 1915, 34 weather records were set or tied at long-record stations worldwide.
  • 2 were record highs and 18 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 2 monthly and 32 daily.
  • Beechal set a daily record precipitation of 33.0 mm (1.3 in) on 21 September 1915.
  • Across 155 earlier years (1805 to 2026) the same calendar date averaged 454 records.

Record Map

34 stations
Weather records on 21 September 1915 34 station records on 21 September 1915 are marked on the map, coloured by record type.
34 station records on 21 September 1915 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 21 September 1915: highest significance records shown on the map
StationCountryTypeValueSignificance
BeechalAustraliaRecord daily precipitation33.0 mm (1.3 in)31 of 100 (Routine)
Murphy 4ESEUnited StatesRecord daily precipitation39.1 mm (1.5 in)27 of 100 (Routine)
Newark Liberty Intl APUnited StatesRecord daily precipitation27.4 mm (1.1 in)24 of 100 (Routine)
Anticosti West PointCanadaRecord daily precipitation46.5 mm (1.8 in)22 of 100 (Routine)
RoseberryAustraliaRecord daily precipitation29.0 mm (1.1 in)19 of 100 (Routine)
LeominsterUnited StatesRecord daily precipitation33.5 mm (1.3 in)17 of 100 (Routine)
Koebenhavn: Landbohojskolen-1DenmarkRecord low minimum temperature-0.3 C (31.5 F)16 of 100 (Routine)
Katberg (Bos)South AfricaRecord daily precipitation11.4 mm (0.4 in)16 of 100 (Routine)
PlauenGermanyRecord low minimum temperature-1.0 C (30.2 F)15 of 100 (Routine)
London SouthCanadaRecord daily precipitation7.9 mm (0.31 in)14 of 100 (Routine)
TranebjergDenmarkRecord low minimum temperature1.4 C (34.5 F)14 of 100 (Routine)
Berlin-DahlemGermanyRecord low minimum temperature-0.5 C (31.1 F)14 of 100 (Routine)
Parry SoundCanadaRecord daily precipitation18.3 mm (0.7 in)13 of 100 (Routine)
WiartonCanadaRecord daily precipitation22.9 mm (0.9 in)13 of 100 (Routine)
AuroraCanadaRecord daily precipitation14.2 mm (0.6 in)13 of 100 (Routine)
BromeCanadaRecord daily precipitation20.6 mm (0.8 in)13 of 100 (Routine)
GorlitzGermanyRecord low minimum temperature1.3 C (34.3 F)13 of 100 (Routine)
Visby_FlygplatsSwedenRecord low maximum temperature7.8 C (46.0 F)13 of 100 (Routine)
PatersonUnited StatesRecord daily precipitation35.6 mm (1.4 in)12 of 100 (Routine)
Heinersreuth-VollhofGermanyRecord low minimum temperature-1.6 C (29.1 F)11 of 100 (Routine)
HanoverUnited StatesRecord daily precipitation18.3 mm (0.7 in)11 of 100 (Routine)
WienAustriaRecord low minimum temperature4.5 C (40.1 F)10 of 100 (Routine)
Anticosti SW PointCanadaRecord high maximum temperature19.4 C (66.9 F)10 of 100 (Routine)
Velikie LukiRussiaRecord low maximum temperature5.5 C (41.9 F)10 of 100 (Routine)
KarlshamnSwedenRecord low minimum temperature-0.5 C (31.1 F)10 of 100 (Routine)
SalzburgAustriaRecord low minimum temperature3.0 C (37.4 F)9 of 100 (Routine)
HalmstadSwedenRecord low minimum temperature-1.5 C (29.3 F)8 of 100 (Routine)
MagdeburgGermanyRecord low minimum temperature1.1 C (34.0 F)6 of 100 (Routine)
ArmaghUnited KingdomRecord high minimum temperature12.9 C (55.2 F)6 of 100 (Routine)
Concordia ASOSUnited StatesRecord low maximum temperature17.8 C (64.0 F)6 of 100 (Routine)
Skara 1SwedenRecord low minimum temperature-4.0 C (24.8 F)5 of 100 (Routine)
Concordia ASOSUnited StatesRecord low minimum temperature3.3 C (37.9 F)5 of 100 (Routine)
ChemnitzGermanyRecord low minimum temperature-0.7 C (30.7 F)4 of 100 (Routine)
KristianstadSwedenRecord low minimum temperature0.5 C (32.9 F)2 of 100 (Routine)

Counts by Type and Timescale

34 records
Records on 21 September 1915 by type Records set or tied on 21 September 1915 by type: Highest daily maximum 1, Lowest daily maximum 3, Highest daily minimum 1, Lowest daily minimum 15, Heaviest daily rainfall 14. 051015Highest daily maximum: 1Lowest daily maximum: 3Highest daily minimum: 1Lowest daily minimum: 15Heaviest daily rainfall: 14Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 21 September 1915 by type: Highest daily maximum 1, Lowest daily maximum 3, Highest daily minimum 1, Lowest daily minimum 15, Heaviest daily rainfall 14.
Records on 21 September 1915 by type
Record typeRecords
Highest daily maximum1
Lowest daily maximum3
Highest daily minimum1
Lowest daily minimum15
Heaviest daily rainfall14
Heaviest daily snowfall0
Deepest snow cover0
Records on 21 September 1915 by timescale Records on 21 September 1915 by timescale: all-time 0, monthly 2, daily 32. 010203040all-time: 0monthly: 2daily: 32all-timemonthlydaily
Records on 21 September 1915 by timescale: all-time 0, monthly 2, daily 32.
Records on 21 September 1915 by timescale
TimescaleRecords
all-time0
monthly2
daily32

How Much Records Were Beaten By

32 broken records
Histogram of margins by which records were beaten on 21 September 1915 Margins by which the 32 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 24.6. Ties are not counted. 01020300 to 5: 255 to 10: 310 to 15: 115 to 20: 120 to 25: 20 to 55 to 1010 to 1515 to 2020 to 25
Margins by which the 32 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 24.6. Ties are not counted.
Histogram of margins by which records were beaten on 21 September 1915
MarginRecords
0 to 525
5 to 103
10 to 151
15 to 201
20 to 252

Top 20 by Significance

21 September 1915
Top 20 records on 21 September 1915 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
21 September 1915Beechal, AUdaily rain33.0 mm (1.3 in)20.6 mm (0.8 in)17 years31 of 100 (Routine)
21 September 1915Murphy 4ESE, USdaily rain39.1 mm (1.5 in)24.6 mm (1.0 in)24 years27 of 100 (Routine)
21 September 1915Newark Liberty Intl AP, USdaily rain27.4 mm (1.1 in)3.3 mm (0.13 in)55 years24 of 100 (Routine)
21 September 1915Anticosti West Point, CAmonthly rain46.5 mm (1.8 in)3.1 mm (0.12 in)23 years22 of 100 (Routine)
21 September 1915Roseberry, AUdaily rain29.0 mm (1.1 in)13.5 mm (0.5 in)8 years19 of 100 (Routine)
21 September 1915Leominster, USdaily rain33.5 mm (1.3 in)16.7 mm (0.7 in)15 years17 of 100 (Routine)
21 September 1915Koebenhavn: Landbohojskolen-1, DKdaily low min-0.3 C (31.5 F)0.5 C (0.9 F)37 years16 of 100 (Routine)
21 September 1915Katberg (Bos), ZAdaily rain11.4 mm (0.4 in)5.8 mm (0.23 in)30 years16 of 100 (Routine)
21 September 1915Plauen, DEdaily low min-1.0 C (30.2 F)1.8 C (3.2 F)26 years15 of 100 (Routine)
21 September 1915London South, CAdaily rain7.9 mm (0.31 in)1.8 mm (0.07 in)31 years14 of 100 (Routine)
21 September 1915Tranebjerg, DKdaily low min1.4 C (34.5 F)1.1 C (2.0 F)22 years14 of 100 (Routine)
21 September 1915Berlin-Dahlem, DEdaily low min-0.5 C (31.1 F)3.3 C (5.9 F)2 years14 of 100 (Routine)
21 September 1915Parry Sound, CAdaily rain18.3 mm (0.7 in)1.3 mm (0.05 in)29 years13 of 100 (Routine)
21 September 1915Wiarton, CAdaily rain22.9 mm (0.9 in)3.8 mm (0.15 in)25 years13 of 100 (Routine)
21 September 1915Aurora, CAdaily rain14.2 mm (0.6 in)9.4 mm (0.37 in)4 years13 of 100 (Routine)
21 September 1915Brome, CAdaily rain20.6 mm (0.8 in)2.8 mm (0.11 in)25 years13 of 100 (Routine)
21 September 1915Gorlitz, DEdaily low min1.3 C (34.3 F)0.8 C (1.4 F)26 years13 of 100 (Routine)
21 September 1915Visby_Flygplats, SEmonthly low max7.8 C (46.0 F)0.1 C (0.2 F)0 years13 of 100 (Routine)
21 September 1915Paterson, USdaily rain35.6 mm (1.4 in)6.4 mm (0.25 in)15 years12 of 100 (Routine)
21 September 1915Heinersreuth-Vollhof, DEdaily low min-1.6 C (29.1 F)1.8 C (3.2 F)12 years11 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 1915
Records on 09-21 in each year Records set or tied on this calendar date in each year from 1805 to 1915. 1915 had 34 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: 1,0512019: 8332020: 5802021: 4652022: 1,0492023: 7832024: 4702025: 5912026: 4781805188419031919193519511967198319992015
Records set or tied on this calendar date in each year from 1805 to 1915. 1915 had 34 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
20181,051
2019833
2020580
2021465
20221,049
2023783
2024470
2025591
2026478

Download the Data

  • Data for records on 1915-09-21: 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).