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Built 2026-10-19 (19 October 2026)

Weather Records on 18 August 1909

24 weather records were set or tied worldwide on 18 August 1909. Highest significance: Regensburg, DE.

Key Facts for 18 August 1909

  • On 18 August 1909, 24 weather records were set or tied at long-record stations worldwide.
  • 8 were record highs and 2 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 24 daily.
  • Regensburg set a daily record precipitation of 26.2 mm (1.0 in) on 18 August 1909.
  • Across 171 earlier years (1797 to 2026) the same calendar date averaged 443 records.

Record Map

24 stations
Weather records on 18 August 1909 24 station records on 18 August 1909 are marked on the map, coloured by record type.
24 station records on 18 August 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 18 August 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
RegensburgGermanyRecord daily precipitation26.2 mm (1.0 in)32 of 100 (Routine)
Berlin-DahlemGermanyRecord daily precipitation14.5 mm (0.6 in)20 of 100 (Routine)
Passau-MaierhofGermanyRecord daily precipitation10.9 mm (0.4 in)14 of 100 (Routine)
Little Rock St CapitolUnited StatesRecord high maximum temperature38.3 C (100.9 F)14 of 100 (Routine)
Port ArthurCanadaRecord high maximum temperature29.4 C (84.9 F)13 of 100 (Routine)
HalifaxCanadaRecord daily precipitation40.9 mm (1.6 in)13 of 100 (Routine)
MettenGermanyRecord daily precipitation14.7 mm (0.6 in)13 of 100 (Routine)
ArmaghUnited KingdomRecord low minimum temperature5.8 C (42.4 F)12 of 100 (Routine)
Adelaide (Thorndon Park)AustraliaRecord daily precipitation5.6 mm (0.22 in)10 of 100 (Routine)
Yamba Pilot StationAustraliaRecord daily precipitation30.0 mm (1.2 in)10 of 100 (Routine)
Trenton 2United StatesRecord low maximum temperature21.1 C (70.0 F)10 of 100 (Routine)
Fredericton UnbCanadaRecord daily precipitation24.4 mm (1.0 in)8 of 100 (Routine)
ChathamCanadaRecord daily precipitation34.0 mm (1.3 in)7 of 100 (Routine)
Nordby (Fano)DenmarkRecord daily precipitation27.9 mm (1.1 in)7 of 100 (Routine)
Little Rock St CapitolUnited StatesRecord high minimum temperature26.1 C (79.0 F)7 of 100 (Routine)
Koebenhavn - Meteorologisk InsDenmarkRecord daily precipitation3.4 mm (0.13 in)6 of 100 (Routine)
Port ArthurCanadaRecord high minimum temperature16.7 C (62.1 F)5 of 100 (Routine)
VestervigDenmarkRecord daily precipitation19.9 mm (0.8 in)4 of 100 (Routine)
Saint JohnCanadaRecord high minimum temperature15.6 C (60.1 F)3 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord high minimum temperature25.6 C (78.1 F)3 of 100 (Routine)
Port HastingsCanadaRecord daily precipitation38.1 mm (1.5 in)2 of 100 (Routine)
Grafton City CouncilAustraliaRecord daily precipitation7.6 mm (0.30 in)1 of 100 (Routine)
DalhousieCanadaRecord high minimum temperature13.9 C (57.0 F)1 of 100 (Routine)
Jacksonville Wb CityUnited StatesRecord high maximum temperature36.1 C (97.0 F)1 of 100 (Routine)

Counts by Type and Timescale

24 records
Records on 18 August 1909 by type Records set or tied on 18 August 1909 by type: Highest daily maximum 3, Lowest daily maximum 1, Highest daily minimum 5, Lowest daily minimum 1, Heaviest daily rainfall 14. 051015Highest daily maximum: 3Lowest daily maximum: 1Highest daily minimum: 5Lowest daily minimum: 1Heaviest daily rainfall: 14Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 18 August 1909 by type: Highest daily maximum 3, Lowest daily maximum 1, Highest daily minimum 5, Lowest daily minimum 1, Heaviest daily rainfall 14.
Records on 18 August 1909 by type
Record typeRecords
Highest daily maximum3
Lowest daily maximum1
Highest daily minimum5
Lowest daily minimum1
Heaviest daily rainfall14
Heaviest daily snowfall0
Deepest snow cover0
Records on 18 August 1909 by timescale Records on 18 August 1909 by timescale: all-time 0, monthly 0, daily 24. 0102030all-time: 0monthly: 0daily: 24all-timemonthlydaily
Records on 18 August 1909 by timescale: all-time 0, monthly 0, daily 24.
Records on 18 August 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily24

How Much Records Were Beaten By

18 broken records
Histogram of margins by which records were beaten on 18 August 1909 Margins by which the 18 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 15.0. Ties are not counted. 0358100 to 2: 92 to 4: 44 to 6: 06 to 8: 28 to 10: 010 to 12: 012 to 14: 214 to 16: 10 to 22 to 44 to 66 to 88 to 1010 to 1212 to 1414 to 16
Margins by which the 18 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 15.0. Ties are not counted.
Histogram of margins by which records were beaten on 18 August 1909
MarginRecords
0 to 29
2 to 44
4 to 60
6 to 82
8 to 100
10 to 120
12 to 142
14 to 161

Top 20 by Significance

18 August 1909
Top 20 records on 18 August 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
18 August 1909Regensburg, DEdaily rain26.2 mm (1.0 in)15.0 mm (0.6 in)21 years32 of 100 (Routine)
18 August 1909Berlin-Dahlem, DEdaily rain14.5 mm (0.6 in)7.6 mm (0.30 in)12 years20 of 100 (Routine)
18 August 1909Passau-Maierhof, DEdaily rain10.9 mm (0.4 in)3.8 mm (0.15 in)21 years14 of 100 (Routine)
18 August 1909Little Rock St Capitol, USdaily high max38.3 C (100.9 F)1.6 C (2.9 F)22 years14 of 100 (Routine)
18 August 1909Port Arthur, CAdaily high max29.4 C (84.9 F)1.1 C (2.0 F)25 years13 of 100 (Routine)
18 August 1909Halifax, CAdaily rain40.9 mm (1.6 in)13.0 mm (0.5 in)0 years13 of 100 (Routine)
18 August 1909Metten, DEdaily rain14.7 mm (0.6 in)3.4 mm (0.13 in)21 years13 of 100 (Routine)
18 August 1909Armagh, GBdaily low min5.8 C (42.4 F)0.3 C (0.5 F)18 years12 of 100 (Routine)
18 August 1909Adelaide (Thorndon Park), AUdaily rain5.6 mm (0.22 in)0.8 mm (0.03 in)22 years10 of 100 (Routine)
18 August 1909Yamba Pilot Station, AUdaily rain30.0 mm (1.2 in)12.2 mm (0.5 in)9 years10 of 100 (Routine)
18 August 1909Trenton 2, USdaily low max21.1 C (70.0 F)1.1 C (2.0 F)12 years10 of 100 (Routine)
18 August 1909Fredericton Unb, CAdaily rain24.4 mm (1.0 in)6.6 mm (0.26 in)0 years8 of 100 (Routine)
18 August 1909Chatham, CAdaily rain34.0 mm (1.3 in)3.8 mm (0.15 in)6 years7 of 100 (Routine)
18 August 1909Nordby (Fano), DKdaily rain27.9 mm (1.1 in)2.3 mm (0.09 in)4 years7 of 100 (Routine)
18 August 1909Little Rock St Capitol, USdaily high min26.1 C (79.0 F)0.5 C (0.9 F)7 years7 of 100 (Routine)
18 August 1909Koebenhavn - Meteorologisk Ins, DKdaily rain3.4 mm (0.13 in)0.1 mm (0.00 in)11 years6 of 100 (Routine)
18 August 1909Port Arthur, CAdaily high min16.7 C (62.1 F)0.6 C (1.1 F)4 years5 of 100 (Routine)
18 August 1909Vestervig, DKdaily rain19.9 mm (0.8 in)0.6 mm (0.02 in)4 years4 of 100 (Routine)
18 August 1909Saint John, CAdaily high min (Tie)15.6 C (60.1 F)tie33 years3 of 100 (Routine)
18 August 1909Jacksonville Wb City, USdaily high min (Tie)25.6 C (78.1 F)tie36 years3 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 08-18 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: 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 1909. 1909 had 24 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 1909-08-18: 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).