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Weather Records on 15 September 1909

16 weather records were set or tied worldwide on 15 September 1909. Highest significance: San Diego Wbo, US.

Key Facts for 15 September 1909

  • On 15 September 1909, 16 weather records were set or tied at long-record stations worldwide.
  • 6 were record highs and 5 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 16 daily.
  • San Diego Wbo set a daily record high maximum temperature of 37.2 C (99.0 F) on 15 September 1909.
  • Across 170 earlier years (1797 to 2026) the same calendar date averaged 415 records.

Record Map

16 stations
Weather records on 15 September 1909 16 station records on 15 September 1909 are marked on the map, coloured by record type.
16 station records on 15 September 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 15 September 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
San Diego WboUnited StatesRecord high maximum temperature37.2 C (99.0 F)24 of 100 (Routine)
Oran-Hopital MilitaireAlgeriaRecord low maximum temperature22.0 C (71.6 F)20 of 100 (Routine)
GalwayIrelandRecord low minimum temperature3.3 C (37.9 F)20 of 100 (Routine)
Portland Rfc CityUnited StatesRecord high maximum temperature30.0 C (86.0 F)16 of 100 (Routine)
GospicCroatiaRecord daily precipitation17.5 mm (0.7 in)15 of 100 (Routine)
ArmaghUnited KingdomRecord low minimum temperature0.6 C (33.1 F)14 of 100 (Routine)
StonecliffeCanadaRecord daily precipitation18.3 mm (0.7 in)12 of 100 (Routine)
Wentworth (Avoca)AustraliaRecord daily precipitation7.9 mm (0.31 in)10 of 100 (Routine)
LakefieldCanadaRecord high minimum temperature19.4 C (66.9 F)10 of 100 (Routine)
Pooncarie (Tarcoola)AustraliaRecord daily precipitation3.8 mm (0.15 in)9 of 100 (Routine)
Wentworth Post OfficeAustraliaRecord daily precipitation6.4 mm (0.25 in)9 of 100 (Routine)
Uppsala_AutSwedenRecord low minimum temperature-1.7 C (28.9 F)9 of 100 (Routine)
Owen SoundCanadaRecord high minimum temperature19.4 C (66.9 F)8 of 100 (Routine)
San Diego WboUnited StatesRecord high minimum temperature20.0 C (68.0 F)3 of 100 (Routine)
St John'sCanadaRecord low minimum temperature1.7 C (35.1 F)2 of 100 (Routine)
Windsor RiversideCanadaRecord high minimum temperature20.0 C (68.0 F)1 of 100 (Routine)

Counts by Type and Timescale

16 records
Records on 15 September 1909 by type Records set or tied on 15 September 1909 by type: Highest daily maximum 2, Lowest daily maximum 1, Highest daily minimum 4, Lowest daily minimum 4, Heaviest daily rainfall 5. 0246Highest daily maximum: 2Lowest daily maximum: 1Highest daily minimum: 4Lowest daily minimum: 4Heaviest daily rainfall: 5Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 15 September 1909 by type: Highest daily maximum 2, Lowest daily maximum 1, Highest daily minimum 4, Lowest daily minimum 4, Heaviest daily rainfall 5.
Records on 15 September 1909 by type
Record typeRecords
Highest daily maximum2
Lowest daily maximum1
Highest daily minimum4
Lowest daily minimum4
Heaviest daily rainfall5
Heaviest daily snowfall0
Deepest snow cover0
Records on 15 September 1909 by timescale Records on 15 September 1909 by timescale: all-time 0, monthly 0, daily 16. 05101520all-time: 0monthly: 0daily: 16all-timemonthlydaily
Records on 15 September 1909 by timescale: all-time 0, monthly 0, daily 16.
Records on 15 September 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily16

How Much Records Were Beaten By

13 broken records
Histogram of margins by which records were beaten on 15 September 1909 Margins by which the 13 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 8.5. Ties are not counted. 0358100 to 2: 92 to 4: 24 to 6: 16 to 8: 08 to 10: 10 to 22 to 44 to 66 to 88 to 10
Margins by which the 13 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 8.5. Ties are not counted.
Histogram of margins by which records were beaten on 15 September 1909
MarginRecords
0 to 29
2 to 42
4 to 61
6 to 80
8 to 101

Top 20 by Significance

15 September 1909
Top 16 records on 15 September 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
15 September 1909San Diego Wbo, USdaily high max37.2 C (99.0 F)5.0 C (9.0 F)14 years24 of 100 (Routine)
15 September 1909Oran-Hopital Militaire, DZdaily low max22.0 C (71.6 F)0.5 C (0.9 F)45 years20 of 100 (Routine)
15 September 1909Galway, IEdaily low min3.3 C (37.9 F)1.1 C (2.0 F)44 years20 of 100 (Routine)
15 September 1909Portland Rfc City, USdaily high max30.0 C (86.0 F)1.7 C (3.1 F)33 years16 of 100 (Routine)
15 September 1909Gospic, HRdaily rain17.5 mm (0.7 in)8.5 mm (0.33 in)28 years15 of 100 (Routine)
15 September 1909Armagh, GBdaily low min0.6 C (33.1 F)2.0 C (3.6 F)6 years14 of 100 (Routine)
15 September 1909Stonecliffe, CAdaily rain18.3 mm (0.7 in)1.8 mm (0.07 in)26 years12 of 100 (Routine)
15 September 1909Wentworth (Avoca), AUdaily rain7.9 mm (0.31 in)2.6 mm (0.10 in)13 years10 of 100 (Routine)
15 September 1909Lakefield, CAdaily high min19.4 C (66.9 F)1.1 C (2.0 F)19 years10 of 100 (Routine)
15 September 1909Pooncarie (Tarcoola), AUdaily rain3.8 mm (0.15 in)1.5 mm (0.06 in)13 years9 of 100 (Routine)
15 September 1909Wentworth Post Office, AUdaily rain6.4 mm (0.25 in)1.1 mm (0.04 in)13 years9 of 100 (Routine)
15 September 1909Uppsala_Aut, SEdaily low min-1.7 C (28.9 F)0.4 C (0.7 F)4 years9 of 100 (Routine)
15 September 1909Owen Sound, CAdaily high min19.4 C (66.9 F)0.5 C (0.9 F)19 years8 of 100 (Routine)
15 September 1909San Diego Wbo, USdaily high min (Tie)20.0 C (68.0 F)tie33 years3 of 100 (Routine)
15 September 1909St John's, CAdaily low min (Tie)1.7 C (35.1 F)tie24 years2 of 100 (Routine)
15 September 1909Windsor Riverside, CAdaily high min (Tie)20.0 C (68.0 F)tie6 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

1797 to 1909
Records on 09-15 in each year Records set or tied on this calendar date in each year from 1797 to 1909. 1909 had 16 records. 01,0002,0003,0001797: 11803: 11806: 21810: 11816: 11818: 11823: 21833: 11836: 11837: 21839: 11841: 11848: 11850: 11851: 11854: 21856: 11857: 11859: 11864: 11865: 21866: 11867: 21868: 11869: 11872: 11873: 21876: 21877: 21880: 11881: 11882: 61884: 31885: 41886: 21887: 31888: 11889: 51890: 11894: 41895: 11897: 11898: 31899: 31900: 11901: 121902: 71903: 311904: 301905: 161906: 61907: 71908: 161909: 161910: 21911: 401912: 641913: 431914: 181915: 941916: 441917: 501918: 501919: 521920: 1641921: 1221922: 531923: 1931924: 1031925: 1121926: 1341927: 5391928: 861929: 991930: 2351931: 4221932: 2951933: 3221934: 3511935: 4631936: 4601937: 3371938: 2471939: 1,0981940: 1811941: 2761942: 2781943: 3601944: 3961945: 4181946: 4111947: 6211948: 5571949: 5231950: 7501951: 2831952: 4551953: 4001954: 5181955: 5321956: 6461957: 4491958: 2941959: 8441960: 4101961: 5861962: 5571963: 4551964: 8391965: 6141966: 5341967: 5781968: 4291969: 3621970: 1,1571971: 5981972: 3561973: 7741974: 3861975: 7391976: 6671977: 4001978: 6281979: 1,0221980: 5631981: 6131982: 1,3151983: 7561984: 7661985: 7641986: 9281987: 7191988: 8181989: 9551990: 9111991: 1,1651992: 9191993: 2,2271994: 1,3631995: 7231996: 1,2121997: 1,1771998: 1,7681999: 8582000: 1,1752001: 8372002: 1,2122003: 8552004: 8932005: 1,1232006: 1,0422007: 9462008: 1,1532009: 7732010: 9132011: 1,1702012: 5682013: 8542014: 4432015: 9972016: 9882017: 8252018: 8742019: 5382020: 7852021: 4672022: 3922023: 5072024: 6812025: 5032026: 7791797185918881910192819461964198220002018
Records set or tied on this calendar date in each year from 1797 to 1909. 1909 had 16 records.
Counts for years before the ledger starts come from the same station rules.
Records on 09-15 in each year
YearRecords
17971
18031
18062
18101
18161
18181
18232
18331
18361
18372
18391
18411
18481
18501
18511
18542
18561
18571
18591
18641
18652
18661
18672
18681
18691
18721
18732
18762
18772
18801
18811
18826
18843
18854
18862
18873
18881
18895
18901
18944
18951
18971
18983
18993
19001
190112
19027
190331
190430
190516
19066
19077
190816
190916
19102
191140
191264
191343
191418
191594
191644
191750
191850
191952
1920164
1921122
192253
1923193
1924103
1925112
1926134
1927539
192886
192999
1930235
1931422
1932295
1933322
1934351
1935463
1936460
1937337
1938247
19391,098
1940181
1941276
1942278
1943360
1944396
1945418
1946411
1947621
1948557
1949523
1950750
1951283
1952455
1953400
1954518
1955532
1956646
1957449
1958294
1959844
1960410
1961586
1962557
1963455
1964839
1965614
1966534
1967578
1968429
1969362
19701,157
1971598
1972356
1973774
1974386
1975739
1976667
1977400
1978628
19791,022
1980563
1981613
19821,315
1983756
1984766
1985764
1986928
1987719
1988818
1989955
1990911
19911,165
1992919
19932,227
19941,363
1995723
19961,212
19971,177
19981,768
1999858
20001,175
2001837
20021,212
2003855
2004893
20051,123
20061,042
2007946
20081,153
2009773
2010913
20111,170
2012568
2013854
2014443
2015997
2016988
2017825
2018874
2019538
2020785
2021467
2022392
2023507
2024681
2025503
2026779

Download the Data

  • Data for records on 1909-09-15: 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

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