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Weather Records on 17 August 1909

24 weather records were set or tied worldwide on 17 August 1909. Highest significance: Oxford, GB.

Key Facts for 17 August 1909

  • On 17 August 1909, 24 weather records were set or tied at long-record stations worldwide.
  • 11 were record highs and 5 were record lows, counting maximum and minimum temperature.
  • By timescale, 1 were all-time records, 1 monthly and 22 daily.
  • Oxford set a daily record precipitation of 30.0 mm (1.2 in) on 17 August 1909.
  • Across 162 earlier years (1797 to 2026) the same calendar date averaged 477 records.

Record Map

24 stations
Weather records on 17 August 1909 24 station records on 17 August 1909 are marked on the map, coloured by record type.
24 station records on 17 August 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 17 August 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
OxfordUnited KingdomRecord daily precipitation30.0 mm (1.2 in)39 of 100 (Notable)
ConcordUnited StatesRecord daily precipitation32.3 mm (1.3 in)24 of 100 (Routine)
Windsor RiversideCanadaRecord daily precipitation36.1 mm (1.4 in)22 of 100 (Routine)
PatersonUnited StatesRecord daily precipitation26.7 mm (1.1 in)21 of 100 (Routine)
Berlin-Dahlem (Lfag)GermanyRecord daily precipitation14.5 mm (0.6 in)20 of 100 (Routine)
Brisbane Regional OfficeAustraliaRecord daily precipitation20.1 mm (0.8 in)17 of 100 (Routine)
Middletown 4 WUnited StatesRecord daily precipitation46.5 mm (1.8 in)17 of 100 (Routine)
World Trade CtrUnited StatesRecord low maximum temperature17.8 C (64.0 F)16 of 100 (Routine)
Philadelphia CityUnited StatesRecord low maximum temperature18.9 C (66.0 F)16 of 100 (Routine)
Ny City Cntrl ParkUnited StatesRecord low maximum temperature18.3 C (64.9 F)15 of 100 (Routine)
KarlsruheGermanyRecord high minimum temperature19.3 C (66.7 F)14 of 100 (Routine)
Port DoverCanadaRecord low maximum temperature19.4 C (66.9 F)12 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord high maximum temperature36.1 C (97.0 F)11 of 100 (Routine)
VanersborgSwedenRecord daily precipitation15.3 mm (0.6 in)7 of 100 (Routine)
Little Rock St CapitolUnited StatesRecord high minimum temperature27.2 C (81.0 F)7 of 100 (Routine)
Baltimore Customs HouseUnited StatesRecord low maximum temperature22.2 C (72.0 F)5 of 100 (Routine)
Little Rock St CapitolUnited StatesRecord high maximum temperature40.6 C (105.1 F)4 of 100 (Routine)
Port ArthurCanadaRecord high maximum temperature26.1 C (79.0 F)3 of 100 (Routine)
Saint JohnCanadaRecord high maximum temperature25.0 C (77.0 F)3 of 100 (Routine)
KremsmuensterAustriaRecord high minimum temperature16.6 C (61.9 F)2 of 100 (Routine)
TruroCanadaRecord high minimum temperature18.9 C (66.0 F)2 of 100 (Routine)
Montgomery Wb CityUnited StatesRecord high maximum temperature36.7 C (98.1 F)1 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord high minimum temperature26.1 C (79.0 F)1 of 100 (Routine)
SouthamptonCanadaRecord high minimum temperature17.8 C (64.0 F)0 of 100 (Routine)

Counts by Type and Timescale

24 records
Records on 17 August 1909 by type Records set or tied on 17 August 1909 by type: Highest daily maximum 5, Lowest daily maximum 5, Highest daily minimum 6, Heaviest daily rainfall 8. 02468Highest daily maximum: 5Lowest daily maximum: 5Highest daily minimum: 6Lowest daily minimum: 0Heaviest daily rainfall: 8Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 17 August 1909 by type: Highest daily maximum 5, Lowest daily maximum 5, Highest daily minimum 6, Heaviest daily rainfall 8.
Records on 17 August 1909 by type
Record typeRecords
Highest daily maximum5
Lowest daily maximum5
Highest daily minimum6
Lowest daily minimum0
Heaviest daily rainfall8
Heaviest daily snowfall0
Deepest snow cover0
Records on 17 August 1909 by timescale Records on 17 August 1909 by timescale: all-time 1, monthly 1, daily 22. 0102030all-time: 1monthly: 1daily: 22all-timemonthlydaily
Records on 17 August 1909 by timescale: all-time 1, monthly 1, daily 22.
Records on 17 August 1909 by timescale
TimescaleRecords
all-time1
monthly1
daily22

How Much Records Were Beaten By

15 broken records
Histogram of margins by which records were beaten on 17 August 1909 Margins by which the 15 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 15.8. Ties are not counted. 024680 to 2: 82 to 4: 04 to 6: 36 to 8: 18 to 10: 110 to 12: 012 to 14: 114 to 16: 10 to 22 to 44 to 66 to 88 to 1010 to 1212 to 1414 to 16
Margins by which the 15 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 15.8. Ties are not counted.
Histogram of margins by which records were beaten on 17 August 1909
MarginRecords
0 to 28
2 to 40
4 to 63
6 to 81
8 to 101
10 to 120
12 to 141
14 to 161

Top 20 by Significance

17 August 1909
Top 20 records on 17 August 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
17 August 1909Oxford, GBdaily rain30.0 mm (1.2 in)4.5 mm (0.18 in)81 years39 of 100 (Notable)
17 August 1909Concord, USdaily rain32.3 mm (1.3 in)15.8 mm (0.6 in)29 years24 of 100 (Routine)
17 August 1909Windsor Riverside, CAdaily rain36.1 mm (1.4 in)13.5 mm (0.5 in)21 years22 of 100 (Routine)
17 August 1909Paterson, USdaily rain26.7 mm (1.1 in)8.7 mm (0.34 in)43 years21 of 100 (Routine)
17 August 1909Berlin-Dahlem (Lfag), DEdaily rain14.5 mm (0.6 in)7.6 mm (0.30 in)12 years20 of 100 (Routine)
17 August 1909Brisbane Regional Office, AUdaily rain20.1 mm (0.8 in)4.6 mm (0.18 in)30 years17 of 100 (Routine)
17 August 1909Middletown 4 W, USdaily rain46.5 mm (1.8 in)4.8 mm (0.19 in)36 years17 of 100 (Routine)
17 August 1909World Trade Ctr, USdaily low max17.8 C (64.0 F)1.6 C (2.9 F)27 years16 of 100 (Routine)
17 August 1909Philadelphia City, USdaily low max18.9 C (66.0 F)1.7 C (3.1 F)27 years16 of 100 (Routine)
17 August 1909Ny City Cntrl Park, USdaily low max18.3 C (64.9 F)1.1 C (2.0 F)27 years15 of 100 (Routine)
17 August 1909Karlsruhe, DEdaily high min19.3 C (66.7 F)0.8 C (1.4 F)32 years14 of 100 (Routine)
17 August 1909Port Dover, CAdaily low max19.4 C (66.9 F)0.6 C (1.1 F)29 years12 of 100 (Routine)
17 August 1909Jacksonville Wb City, USdaily high max36.1 C (97.0 F)0.5 C (0.9 F)21 years11 of 100 (Routine)
17 August 1909Vanersborg, SEdaily rain15.3 mm (0.6 in)0.8 mm (0.03 in)9 years7 of 100 (Routine)
17 August 1909Little Rock St Capitol, USall-time high min (Tie)27.2 C (81.0 F)tie28 years7 of 100 (Routine)
17 August 1909Baltimore Customs House, USdaily low max22.2 C (72.0 F)0.6 C (1.1 F)4 years5 of 100 (Routine)
17 August 1909Little Rock St Capitol, USmonthly high max (Tie)40.6 C (105.1 F)tie13 years4 of 100 (Routine)
17 August 1909Port Arthur, CAdaily high max (Tie)26.1 C (79.0 F)tie31 years3 of 100 (Routine)
17 August 1909Saint John, CAdaily high max (Tie)25.0 C (77.0 F)tie35 years3 of 100 (Routine)
17 August 1909Kremsmuenster, ATdaily high min (Tie)16.6 C (61.9 F)tie18 years2 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 08-17 in each year Records set or tied on this calendar date in each year from 1797 to 1909. 1909 had 24 records. 05001,0001,5002,0001797: 21802: 21820: 21837: 11838: 21841: 21842: 11845: 21853: 11854: 11856: 11857: 11861: 31862: 11867: 11868: 31869: 11872: 11875: 21876: 51879: 11881: 11882: 11883: 21885: 31886: 11888: 51891: 11892: 31893: 21894: 31895: 21896: 31897: 11898: 51899: 81900: 31901: 141902: 71903: 61904: 21905: 111906: 281907: 91908: 261909: 241910: 171911: 181912: 311913: 791914: 411915: 281916: 331917: 351918: 1121919: 371920: 1101921: 371922: 1691923: 1611924: 1711925: 1301926: 1821927: 2281928: 1311929: 2431930: 1381931: 3021932: 3601933: 2601934: 3771935: 4371936: 6701937: 7261938: 4661939: 3641940: 3411941: 3781942: 4611943: 7431944: 5311945: 3871946: 4331947: 6821948: 4751949: 3711950: 5221951: 4131952: 4701953: 3451954: 6851955: 4651956: 4071957: 5041958: 5191959: 5431960: 5331961: 9981962: 4451963: 6501964: 4101965: 6411966: 4961967: 6791968: 9531969: 5931970: 4671971: 4471972: 1,0441973: 7501974: 5821975: 6121976: 7971977: 1,2161978: 8141979: 1,4641980: 8951981: 1,1121982: 5541983: 1,5741984: 7261985: 9481986: 9161987: 1,1501988: 1,6081989: 6871990: 9491991: 5601992: 1,8131993: 8031994: 1,0381995: 1,7241996: 7521997: 1,5441998: 1,0031999: 6972000: 9942001: 1,1012002: 1,2662003: 9482004: 1,0462005: 7222006: 8142007: 1,6462008: 1,3012009: 9222010: 1,1052011: 9562012: 1,2152013: 8022014: 9972015: 8902016: 7482017: 5442018: 5182019: 4672020: 1,5292021: 8002022: 1,4282023: 1,0322024: 7402025: 5382026: 5351797187218981915193219491966198320002017
Records set or tied on this calendar date in each year from 1797 to 1909. 1909 had 24 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-17 in each year
YearRecords
17972
18022
18202
18371
18382
18412
18421
18452
18531
18541
18561
18571
18613
18621
18671
18683
18691
18721
18752
18765
18791
18811
18821
18832
18853
18861
18885
18911
18923
18932
18943
18952
18963
18971
18985
18998
19003
190114
19027
19036
19042
190511
190628
19079
190826
190924
191017
191118
191231
191379
191441
191528
191633
191735
1918112
191937
1920110
192137
1922169
1923161
1924171
1925130
1926182
1927228
1928131
1929243
1930138
1931302
1932360
1933260
1934377
1935437
1936670
1937726
1938466
1939364
1940341
1941378
1942461
1943743
1944531
1945387
1946433
1947682
1948475
1949371
1950522
1951413
1952470
1953345
1954685
1955465
1956407
1957504
1958519
1959543
1960533
1961998
1962445
1963650
1964410
1965641
1966496
1967679
1968953
1969593
1970467
1971447
19721,044
1973750
1974582
1975612
1976797
19771,216
1978814
19791,464
1980895
19811,112
1982554
19831,574
1984726
1985948
1986916
19871,150
19881,608
1989687
1990949
1991560
19921,813
1993803
19941,038
19951,724
1996752
19971,544
19981,003
1999697
2000994
20011,101
20021,266
2003948
20041,046
2005722
2006814
20071,646
20081,301
2009922
20101,105
2011956
20121,215
2013802
2014997
2015890
2016748
2017544
2018518
2019467
20201,529
2021800
20221,428
20231,032
2024740
2025538
2026535

Download the Data

  • Data for records on 1909-08-17: 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).