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Built 2026-10-19 (19 October 2026)

Weather Records on 4 August 1917

29 weather records were set or tied worldwide on 4 August 1917. Highest significance: San Diego Wbo, US.

Key Facts for 4 August 1917

  • On 4 August 1917, 29 weather records were set or tied at long-record stations worldwide.
  • 12 were record highs and 3 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 1 monthly and 28 daily.
  • San Diego Wbo set a daily record high minimum temperature of 20.0 C (68.0 F) on 4 August 1917.
  • Across 165 earlier years (1815 to 2026) the same calendar date averaged 444 records.

Record Map

29 stations
Weather records on 4 August 1917 29 station records on 4 August 1917 are marked on the map, coloured by record type.
29 station records on 4 August 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 4 August 1917: highest significance records shown on the map
StationCountryTypeValueSignificance
San Diego WboUnited StatesRecord high minimum temperature20.0 C (68.0 F)23 of 100 (Routine)
WulgulmerangAustraliaRecord daily precipitation17.8 mm (0.7 in)20 of 100 (Routine)
Springsure Comet StAustraliaRecord daily precipitation5.3 mm (0.21 in)20 of 100 (Routine)
Denman (Martindale)AustraliaRecord daily precipitation12.7 mm (0.5 in)18 of 100 (Routine)
Eden (Caravan Park)AustraliaRecord daily precipitation27.9 mm (1.1 in)18 of 100 (Routine)
Koebenhavn: Landbohojskolen-1DenmarkRecord high maximum temperature27.5 C (81.5 F)18 of 100 (Routine)
Visby_FlygplatsSwedenRecord high maximum temperature25.2 C (77.4 F)17 of 100 (Routine)
Orbost (Comparison)AustraliaRecord daily precipitation23.4 mm (0.9 in)16 of 100 (Routine)
Bonang (Goomgerah)AustraliaRecord daily precipitation33.0 mm (1.3 in)16 of 100 (Routine)
Coranderrk Badger WeirAustraliaRecord daily precipitation9.1 mm (0.36 in)16 of 100 (Routine)
Camboon StationAustraliaRecord daily precipitation0.3 mm (0.01 in)15 of 100 (Routine)
BonangAustraliaRecord daily precipitation26.4 mm (1.0 in)15 of 100 (Routine)
Pooncarie Mail AgencyAustraliaRecord daily precipitation7.1 mm (0.28 in)14 of 100 (Routine)
ArumpoAustraliaRecord daily precipitation8.9 mm (0.35 in)13 of 100 (Routine)
TbilisiGeorgiaRecord low minimum temperature15.4 C (59.7 F)13 of 100 (Routine)
HalmstadSwedenRecord high maximum temperature26.5 C (79.7 F)13 of 100 (Routine)
Bombala (Therry Street)AustraliaRecord daily precipitation18.3 mm (0.7 in)12 of 100 (Routine)
Port ArthurCanadaRecord low maximum temperature15.6 C (60.1 F)11 of 100 (Routine)
Skara 1SwedenRecord high maximum temperature27.5 C (81.5 F)10 of 100 (Routine)
Nuwara EliyaSri LankaRecord high maximum temperature22.6 C (72.7 F)9 of 100 (Routine)
Willow Tree (Valais)AustraliaRecord daily precipitation12.7 mm (0.5 in)8 of 100 (Routine)
SydneyCanadaRecord high maximum temperature32.2 C (90.0 F)6 of 100 (Routine)
Hill End Post OfficeAustraliaRecord daily precipitation9.1 mm (0.36 in)5 of 100 (Routine)
Lincoln UNIV Pwr PltUnited StatesRecord high maximum temperature38.9 C (102.0 F)4 of 100 (Routine)
Winnipeg St Johns CollCanadaRecord high minimum temperature16.1 C (61.0 F)3 of 100 (Routine)
Stornoway AirportUnited KingdomRecord high maximum temperature21.7 C (71.1 F)2 of 100 (Routine)
VastervikSwedenRecord high minimum temperature17.0 C (62.6 F)1 of 100 (Routine)
SvegSwedenRecord high maximum temperature27.0 C (80.6 F)1 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord low minimum temperature20.6 C (69.1 F)1 of 100 (Routine)

Counts by Type and Timescale

29 records
Records on 4 August 1917 by type Records set or tied on 4 August 1917 by type: Highest daily maximum 9, Lowest daily maximum 1, Highest daily minimum 3, Lowest daily minimum 2, Heaviest daily rainfall 14. 051015Highest daily maximum: 9Lowest daily maximum: 1Highest daily minimum: 3Lowest daily minimum: 2Heaviest daily rainfall: 14Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 4 August 1917 by type: Highest daily maximum 9, Lowest daily maximum 1, Highest daily minimum 3, Lowest daily minimum 2, Heaviest daily rainfall 14.
Records on 4 August 1917 by type
Record typeRecords
Highest daily maximum9
Lowest daily maximum1
Highest daily minimum3
Lowest daily minimum2
Heaviest daily rainfall14
Heaviest daily snowfall0
Deepest snow cover0
Records on 4 August 1917 by timescale Records on 4 August 1917 by timescale: all-time 0, monthly 1, daily 28. 0102030all-time: 0monthly: 1daily: 28all-timemonthlydaily
Records on 4 August 1917 by timescale: all-time 0, monthly 1, daily 28.
Records on 4 August 1917 by timescale
TimescaleRecords
all-time0
monthly1
daily28

How Much Records Were Beaten By

23 broken records
Histogram of margins by which records were beaten on 4 August 1917 Margins by which the 23 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 14.0. Ties are not counted. 0510150 to 2: 112 to 4: 44 to 6: 26 to 8: 48 to 10: 010 to 12: 112 to 14: 10 to 22 to 44 to 66 to 88 to 1010 to 1212 to 14
Margins by which the 23 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 14.0. Ties are not counted.
Histogram of margins by which records were beaten on 4 August 1917
MarginRecords
0 to 211
2 to 44
4 to 62
6 to 84
8 to 100
10 to 121
12 to 141

Top 20 by Significance

4 August 1917
Top 20 records on 4 August 1917 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
4 August 1917San Diego Wbo, USdaily high min20.0 C (68.0 F)1.1 C (2.0 F)41 years23 of 100 (Routine)
4 August 1917Wulgulmerang, AUdaily rain17.8 mm (0.7 in)14.0 mm (0.6 in)29 years20 of 100 (Routine)
4 August 1917Springsure Comet St, AUdaily rain5.3 mm (0.21 in)5.3 mm (0.21 in)51 years20 of 100 (Routine)
4 August 1917Denman (Martindale), AUdaily rain12.7 mm (0.5 in)5.6 mm (0.22 in)30 years18 of 100 (Routine)
4 August 1917Eden (Caravan Park), AUdaily rain27.9 mm (1.1 in)7.8 mm (0.31 in)25 years18 of 100 (Routine)
4 August 1917Koebenhavn: Landbohojskolen-1, DKdaily high max27.5 C (81.5 F)1.1 C (2.0 F)38 years18 of 100 (Routine)
4 August 1917Visby_Flygplats, SEdaily high max25.2 C (77.4 F)2.2 C (4.0 F)23 years17 of 100 (Routine)
4 August 1917Orbost (Comparison), AUdaily rain23.4 mm (0.9 in)7.9 mm (0.31 in)24 years16 of 100 (Routine)
4 August 1917Bonang (Goomgerah), AUdaily rain33.0 mm (1.3 in)7.6 mm (0.30 in)25 years16 of 100 (Routine)
4 August 1917Coranderrk Badger Weir, AUdaily rain9.1 mm (0.36 in)1.2 mm (0.05 in)36 years16 of 100 (Routine)
4 August 1917Camboon Station, AUdaily rain0.3 mm (0.01 in)0.3 mm (0.01 in)36 years15 of 100 (Routine)
4 August 1917Bonang, AUdaily rain26.4 mm (1.0 in)10.4 mm (0.4 in)10 years15 of 100 (Routine)
4 August 1917Pooncarie Mail Agency, AUdaily rain7.1 mm (0.28 in)3.5 mm (0.14 in)20 years14 of 100 (Routine)
4 August 1917Arumpo, AUdaily rain8.9 mm (0.35 in)6.4 mm (0.25 in)4 years13 of 100 (Routine)
4 August 1917Tbilisi, GEdaily low min15.4 C (59.7 F)0.4 C (0.7 F)32 years13 of 100 (Routine)
4 August 1917Halmstad, SEdaily high max26.5 C (79.7 F)1.5 C (2.7 F)19 years13 of 100 (Routine)
4 August 1917Bombala (Therry Street), AUdaily rain18.3 mm (0.7 in)1.8 mm (0.07 in)25 years12 of 100 (Routine)
4 August 1917Port Arthur, CAdaily low max15.6 C (60.1 F)1.6 C (2.9 F)10 years11 of 100 (Routine)
4 August 1917Skara 1, SEdaily high max27.5 C (81.5 F)1.5 C (2.7 F)12 years10 of 100 (Routine)
4 August 1917Nuwara Eliya, LKdaily high max22.6 C (72.7 F)0.4 C (0.7 F)14 years9 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

1815 to 1917
Records on 08-04 in each year Records set or tied on this calendar date in each year from 1815 to 1917. 1917 had 29 records. 05001,0001,5002,0001815: 11827: 11830: 21833: 11835: 11843: 11846: 11847: 11848: 11857: 11859: 21860: 21863: 11865: 31867: 11868: 11870: 11871: 11872: 21874: 31875: 11878: 31879: 11881: 21882: 11883: 11885: 31886: 11887: 31888: 41889: 21890: 11891: 21893: 21894: 11895: 31896: 41897: 31898: 11899: 71900: 61902: 41903: 181904: 111905: 191906: 141907: 201908: 311909: 271910: 171911: 231912: 511913: 151914: 331915: 851916: 971917: 291918: 951919: 341920: 791921: 671922: 681923: 1461924: 1321925: 771926: 3341927: 1361928: 3521929: 2241930: 6981931: 3711932: 2581933: 3471934: 5211935: 3671936: 7191937: 2581938: 4891939: 4331940: 2361941: 3831942: 3031943: 4681944: 6621945: 3551946: 2651947: 8451948: 5581949: 4211950: 6661951: 6801952: 4651953: 1,0171954: 4261955: 6241956: 4371957: 3431958: 5331959: 3031960: 3311961: 7451962: 4701963: 4381964: 8851965: 4091966: 5521967: 4281968: 2801969: 6381970: 4151971: 8131972: 7731973: 7481974: 1,0401975: 7721976: 8011977: 5991978: 1,0511979: 5101980: 9981981: 6361982: 7031983: 9201984: 7221985: 6341986: 9051987: 8921988: 1,2041989: 7381990: 1,0131991: 7691992: 7541993: 1,0461994: 1,2651995: 1,1171996: 1,1431997: 8911998: 1,4231999: 7622000: 8402001: 1,0872002: 9282003: 1,3092004: 9682005: 1,2462006: 1,1312007: 6852008: 8832009: 6812010: 1,6652011: 1,5362012: 7382013: 4522014: 9802015: 5052016: 7322017: 1,1342018: 7602019: 4992020: 7782021: 6912022: 1,1852023: 1,1502024: 8092025: 8402026: 1,0441815187118941912192919461963198019972014
Records set or tied on this calendar date in each year from 1815 to 1917. 1917 had 29 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-04 in each year
YearRecords
18151
18271
18302
18331
18351
18431
18461
18471
18481
18571
18592
18602
18631
18653
18671
18681
18701
18711
18722
18743
18751
18783
18791
18812
18821
18831
18853
18861
18873
18884
18892
18901
18912
18932
18941
18953
18964
18973
18981
18997
19006
19024
190318
190411
190519
190614
190720
190831
190927
191017
191123
191251
191315
191433
191585
191697
191729
191895
191934
192079
192167
192268
1923146
1924132
192577
1926334
1927136
1928352
1929224
1930698
1931371
1932258
1933347
1934521
1935367
1936719
1937258
1938489
1939433
1940236
1941383
1942303
1943468
1944662
1945355
1946265
1947845
1948558
1949421
1950666
1951680
1952465
19531,017
1954426
1955624
1956437
1957343
1958533
1959303
1960331
1961745
1962470
1963438
1964885
1965409
1966552
1967428
1968280
1969638
1970415
1971813
1972773
1973748
19741,040
1975772
1976801
1977599
19781,051
1979510
1980998
1981636
1982703
1983920
1984722
1985634
1986905
1987892
19881,204
1989738
19901,013
1991769
1992754
19931,046
19941,265
19951,117
19961,143
1997891
19981,423
1999762
2000840
20011,087
2002928
20031,309
2004968
20051,246
20061,131
2007685
2008883
2009681
20101,665
20111,536
2012738
2013452
2014980
2015505
2016732
20171,134
2018760
2019499
2020778
2021691
20221,185
20231,150
2024809
2025840
20261,044

Download the Data

  • Data for records on 1917-08-04: 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).