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Weather Records on 18 August 1912

21 weather records were set or tied worldwide on 18 August 1912. Highest significance: Dubuque River, US.

Key Facts for 18 August 1912

  • On 18 August 1912, 21 weather records were set or tied at long-record stations worldwide.
  • 2 were record highs and 13 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 21 daily.
  • Dubuque River set a daily record precipitation of 90.2 mm (3.6 in) on 18 August 1912.
  • Across 171 earlier years (1797 to 2026) the same calendar date averaged 443 records.

Record Map

21 stations
Weather records on 18 August 1912 21 station records on 18 August 1912 are marked on the map, coloured by record type.
21 station records on 18 August 1912 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 18 August 1912: highest significance records shown on the map
StationCountryTypeValueSignificance
Dubuque RiverUnited StatesRecord daily precipitation90.2 mm (3.6 in)44 of 100 (Notable)
GalwayIrelandRecord low minimum temperature4.4 C (39.9 F)30 of 100 (Routine)
HamiltonCanadaRecord daily precipitation38.1 mm (1.5 in)28 of 100 (Routine)
GeorgetownCanadaRecord daily precipitation31.8 mm (1.3 in)24 of 100 (Routine)
Nicola LakeCanadaRecord daily precipitation19.1 mm (0.8 in)20 of 100 (Routine)
Baltimore Customs HouseUnited StatesRecord high maximum temperature33.3 C (91.9 F)16 of 100 (Routine)
HamiltonCanadaRecord low maximum temperature20.0 C (68.0 F)15 of 100 (Routine)
BrantfordCanadaRecord daily precipitation18.0 mm (0.7 in)14 of 100 (Routine)
GravenhurstCanadaRecord low maximum temperature17.2 C (63.0 F)12 of 100 (Routine)
Nuwara EliyaSri LankaRecord low maximum temperature14.6 C (58.3 F)12 of 100 (Routine)
ConcordUnited StatesRecord low maximum temperature14.4 C (57.9 F)12 of 100 (Routine)
St John'sCanadaRecord low maximum temperature12.8 C (55.0 F)11 of 100 (Routine)
FreiburgGermanyRecord low minimum temperature8.1 C (46.6 F)11 of 100 (Routine)
Winnemucca APUnited StatesRecord low minimum temperature2.8 C (37.0 F)10 of 100 (Routine)
Anticosti SW PointCanadaRecord low minimum temperature5.0 C (41.0 F)7 of 100 (Routine)
Cleveland 2717 EuclidUnited StatesRecord high minimum temperature21.7 C (71.1 F)3 of 100 (Routine)
Ladismith (Tnk)South AfricaRecord daily precipitation5.1 mm (0.20 in)2 of 100 (Routine)
BeatriceCanadaRecord low maximum temperature16.1 C (61.0 F)1 of 100 (Routine)
RegensburgGermanyRecord low minimum temperature7.2 C (45.0 F)1 of 100 (Routine)
San Diego WboUnited StatesRecord low maximum temperature20.0 C (68.0 F)1 of 100 (Routine)
Winnemucca APUnited StatesRecord low maximum temperature23.9 C (75.0 F)1 of 100 (Routine)

Counts by Type and Timescale

21 records
Records on 18 August 1912 by type Records set or tied on 18 August 1912 by type: Highest daily maximum 1, Lowest daily maximum 8, Highest daily minimum 1, Lowest daily minimum 5, Heaviest daily rainfall 6. 02468Highest daily maximum: 1Lowest daily maximum: 8Highest daily minimum: 1Lowest daily minimum: 5Heaviest daily rainfall: 6Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 18 August 1912 by type: Highest daily maximum 1, Lowest daily maximum 8, Highest daily minimum 1, Lowest daily minimum 5, Heaviest daily rainfall 6.
Records on 18 August 1912 by type
Record typeRecords
Highest daily maximum1
Lowest daily maximum8
Highest daily minimum1
Lowest daily minimum5
Heaviest daily rainfall6
Heaviest daily snowfall0
Deepest snow cover0
Records on 18 August 1912 by timescale Records on 18 August 1912 by timescale: all-time 0, monthly 0, daily 21. 0102030all-time: 0monthly: 0daily: 21all-timemonthlydaily
Records on 18 August 1912 by timescale: all-time 0, monthly 0, daily 21.
Records on 18 August 1912 by timescale
TimescaleRecords
all-time0
monthly0
daily21

How Much Records Were Beaten By

15 broken records
Histogram of margins by which records were beaten on 18 August 1912 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 67.1. Ties are not counted. 0510150 to 10: 1110 to 20: 220 to 30: 130 to 40: 040 to 50: 050 to 60: 060 to 70: 10 to 1010 to 2020 to 3030 to 4040 to 5050 to 6060 to 70
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 67.1. Ties are not counted.
Histogram of margins by which records were beaten on 18 August 1912
MarginRecords
0 to 1011
10 to 202
20 to 301
30 to 400
40 to 500
50 to 600
60 to 701

Top 20 by Significance

18 August 1912
Top 20 records on 18 August 1912 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
18 August 1912Dubuque River, USdaily rain90.2 mm (3.6 in)67.1 mm (2.6 in)2 years44 of 100 (Notable)
18 August 1912Galway, IEdaily low min4.4 C (39.9 F)3.4 C (6.1 F)45 years30 of 100 (Routine)
18 August 1912Hamilton, CAdaily rain38.1 mm (1.5 in)21.1 mm (0.8 in)1 year28 of 100 (Routine)
18 August 1912Georgetown, CAdaily rain31.8 mm (1.3 in)15.0 mm (0.6 in)28 years24 of 100 (Routine)
18 August 1912Nicola Lake, CAdaily rain19.1 mm (0.8 in)13.3 mm (0.5 in)20 years20 of 100 (Routine)
18 August 1912Baltimore Customs House, USdaily high max33.3 C (91.9 F)0.5 C (0.9 F)37 years16 of 100 (Routine)
18 August 1912Hamilton, CAdaily low max20.0 C (68.0 F)1.7 C (3.1 F)25 years15 of 100 (Routine)
18 August 1912Brantford, CAdaily rain18.0 mm (0.7 in)6.8 mm (0.27 in)16 years14 of 100 (Routine)
18 August 1912Gravenhurst, CAdaily low max17.2 C (63.0 F)0.6 C (1.1 F)29 years12 of 100 (Routine)
18 August 1912Nuwara Eliya, LKdaily low max14.6 C (58.3 F)0.8 C (1.4 F)18 years12 of 100 (Routine)
18 August 1912Concord, USdaily low max14.4 C (57.9 F)1.2 C (2.2 F)18 years12 of 100 (Routine)
18 August 1912St John's, CAdaily low max12.8 C (55.0 F)0.5 C (0.9 F)23 years11 of 100 (Routine)
18 August 1912Freiburg, DEdaily low min8.1 C (46.6 F)0.2 C (0.4 F)28 years11 of 100 (Routine)
18 August 1912Winnemucca AP, USdaily low min2.8 C (37.0 F)1.6 C (2.9 F)12 years10 of 100 (Routine)
18 August 1912Anticosti SW Point, CAdaily low min5.0 C (41.0 F)0.6 C (1.1 F)7 years7 of 100 (Routine)
18 August 1912Cleveland 2717 Euclid, USdaily high min (Tie)21.7 C (71.1 F)tie39 years3 of 100 (Routine)
18 August 1912Ladismith (Tnk), ZAdaily rain (Tie)5.1 mm (0.20 in)tie25 years2 of 100 (Routine)
18 August 1912Beatrice, CAdaily low max (Tie)16.1 C (61.0 F)tie15 years1 of 100 (Routine)
18 August 1912Regensburg, DEdaily low min (Tie)7.2 C (45.0 F)tie4 years1 of 100 (Routine)
18 August 1912San Diego Wbo, USdaily low max (Tie)20.0 C (68.0 F)tie12 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 1912
Records on 08-18 in each year Records set or tied on this calendar date in each year from 1797 to 1912. 1912 had 21 records. 05001,0001,5002,0001797: 21805: 11816: 11827: 11829: 11830: 11833: 11841: 11844: 11845: 31846: 11847: 11849: 11851: 11852: 11853: 11854: 21855: 11856: 11861: 11864: 21866: 11868: 21869: 11870: 21872: 11873: 11875: 31876: 11878: 11879: 21883: 31885: 31886: 31887: 31888: 21889: 11890: 11891: 21892: 61893: 41894: 41895: 11898: 41899: 61900: 21901: 101902: 81903: 61904: 81905: 101906: 401907: 71908: 211909: 241910: 161911: 111912: 211913: 431914: 371915: 601916: 711917: 701918: 531919: 341920: 511921: 391922: 1291923: 901924: 2251925: 3001926: 1681927: 2691928: 1411929: 1811930: 1501931: 2411932: 3821933: 4311934: 6381935: 4241936: 7661937: 3081938: 2431939: 3811940: 4341941: 4671942: 3331943: 7381944: 3251945: 4001946: 4161947: 9581948: 3151949: 3931950: 6831951: 3551952: 4051953: 3231954: 6221955: 7951956: 5801957: 3801958: 5801959: 5371960: 5991961: 4151962: 4281963: 7601964: 4431965: 5251966: 5731967: 6231968: 7951969: 5301970: 5971971: 3811972: 4931973: 7341974: 6391975: 8441976: 9171977: 1,1121978: 8541979: 1,3091980: 7711981: 1,3861982: 5631983: 1,4201984: 6001985: 7651986: 8611987: 1,6091988: 1,3511989: 9521990: 9201991: 5331992: 1,4971993: 7061994: 1,0271995: 1,8821996: 7601997: 1,1911998: 9231999: 8882000: 1,1832001: 1,0362002: 1,3062003: 8602004: 1,0502005: 8652006: 8422007: 1,1162008: 1,2652009: 8392010: 1,1672011: 1,2392012: 1,2472013: 7522014: 7512015: 8802016: 7042017: 5652018: 4622019: 6152020: 1,5412021: 1,1182022: 1,2372023: 1,0942024: 6962025: 4552026: 5451797185618891909192719451963198119992017
Records set or tied on this calendar date in each year from 1797 to 1912. 1912 had 21 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-18 in each year
YearRecords
17972
18051
18161
18271
18291
18301
18331
18411
18441
18453
18461
18471
18491
18511
18521
18531
18542
18551
18561
18611
18642
18661
18682
18691
18702
18721
18731
18753
18761
18781
18792
18833
18853
18863
18873
18882
18891
18901
18912
18926
18934
18944
18951
18984
18996
19002
190110
19028
19036
19048
190510
190640
19077
190821
190924
191016
191111
191221
191343
191437
191560
191671
191770
191853
191934
192051
192139
1922129
192390
1924225
1925300
1926168
1927269
1928141
1929181
1930150
1931241
1932382
1933431
1934638
1935424
1936766
1937308
1938243
1939381
1940434
1941467
1942333
1943738
1944325
1945400
1946416
1947958
1948315
1949393
1950683
1951355
1952405
1953323
1954622
1955795
1956580
1957380
1958580
1959537
1960599
1961415
1962428
1963760
1964443
1965525
1966573
1967623
1968795
1969530
1970597
1971381
1972493
1973734
1974639
1975844
1976917
19771,112
1978854
19791,309
1980771
19811,386
1982563
19831,420
1984600
1985765
1986861
19871,609
19881,351
1989952
1990920
1991533
19921,497
1993706
19941,027
19951,882
1996760
19971,191
1998923
1999888
20001,183
20011,036
20021,306
2003860
20041,050
2005865
2006842
20071,116
20081,265
2009839
20101,167
20111,239
20121,247
2013752
2014751
2015880
2016704
2017565
2018462
2019615
20201,541
20211,118
20221,237
20231,094
2024696
2025455
2026545

Download the Data

  • Data for records on 1912-08-18: 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).