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Built 2026-10-19 (19 October 2026)

Weather Records on 18 September 1909

17 weather records were set or tied worldwide on 18 September 1909. Highest significance: Bologna, IT.

Key Facts for 18 September 1909

  • On 18 September 1909, 17 weather records were set or tied at long-record stations worldwide.
  • 1 were record highs and 4 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 1 monthly and 16 daily.
  • Bologna set a daily record precipitation of 58.3 mm (2.3 in) on 18 September 1909.
  • Across 163 earlier years (1803 to 2026) the same calendar date averaged 424 records.

Record Map

17 stations
Weather records on 18 September 1909 17 station records on 18 September 1909 are marked on the map, coloured by record type.
17 station records on 18 September 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 18 September 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
BolognaItalyRecord daily precipitation58.3 mm (2.3 in)46 of 100 (Notable)
LichtentanneGermanyRecord daily precipitation26.4 mm (1.0 in)32 of 100 (Routine)
Leipzig-HolzhausenGermanyRecord daily precipitation25.1 mm (1.0 in)31 of 100 (Routine)
Heinersreuth-VollhofGermanyRecord daily precipitation25.2 mm (1.0 in)21 of 100 (Routine)
StockholmSwedenRecord daily precipitation14.6 mm (0.6 in)20 of 100 (Routine)
Berlin-Dahlem (Lfag)GermanyRecord daily precipitation24.7 mm (1.0 in)20 of 100 (Routine)
Jena SternwarteGermanyRecord daily precipitation15.5 mm (0.6 in)20 of 100 (Routine)
PutbusGermanyRecord daily precipitation13.0 mm (0.5 in)19 of 100 (Routine)
RegensburgGermanyRecord daily precipitation12.0 mm (0.5 in)13 of 100 (Routine)
Portland Rfc CityUnited StatesRecord low minimum temperature5.0 C (41.0 F)13 of 100 (Routine)
Augsburg (Sankt Stephan)GermanyRecord daily precipitation7.1 mm (0.28 in)11 of 100 (Routine)
Bamberg (Sternwarte)GermanyRecord daily precipitation18.7 mm (0.7 in)11 of 100 (Routine)
Winnipeg St Johns CollCanadaRecord high minimum temperature13.9 C (57.0 F)8 of 100 (Routine)
RivaItalyRecord low maximum temperature18.0 C (64.4 F)8 of 100 (Routine)
Newcastle Nobbys Signal StatioAustraliaRecord daily precipitation34.0 mm (1.3 in)5 of 100 (Routine)
Dublin Phoenix ParkIrelandRecord low minimum temperature0.7 C (33.3 F)3 of 100 (Routine)
Oran-Hopital MilitaireAlgeriaRecord low minimum temperature14.0 C (57.2 F)1 of 100 (Routine)

Counts by Type and Timescale

17 records
Records on 18 September 1909 by type Records set or tied on 18 September 1909 by type: Lowest daily maximum 1, Highest daily minimum 1, Lowest daily minimum 3, Heaviest daily rainfall 12. 051015Highest daily maximum: 0Lowest daily maximum: 1Highest daily minimum: 1Lowest daily minimum: 3Heaviest daily rainfall: 12Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 18 September 1909 by type: Lowest daily maximum 1, Highest daily minimum 1, Lowest daily minimum 3, Heaviest daily rainfall 12.
Records on 18 September 1909 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum1
Highest daily minimum1
Lowest daily minimum3
Heaviest daily rainfall12
Heaviest daily snowfall0
Deepest snow cover0
Records on 18 September 1909 by timescale Records on 18 September 1909 by timescale: all-time 0, monthly 1, daily 16. 05101520all-time: 0monthly: 1daily: 16all-timemonthlydaily
Records on 18 September 1909 by timescale: all-time 0, monthly 1, daily 16.
Records on 18 September 1909 by timescale
TimescaleRecords
all-time0
monthly1
daily16

How Much Records Were Beaten By

15 broken records
Histogram of margins by which records were beaten on 18 September 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 27.3. Ties are not counted. 0358100 to 5: 105 to 10: 110 to 15: 215 to 20: 120 to 25: 025 to 30: 10 to 55 to 1010 to 1515 to 2020 to 2525 to 30
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 27.3. Ties are not counted.
Histogram of margins by which records were beaten on 18 September 1909
MarginRecords
0 to 510
5 to 101
10 to 152
15 to 201
20 to 250
25 to 301

Top 20 by Significance

18 September 1909
Top 17 records on 18 September 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
18 September 1909Bologna, ITdaily rain58.3 mm (2.3 in)27.3 mm (1.1 in)57 years46 of 100 (Notable)
18 September 1909Lichtentanne, DEdaily rain26.4 mm (1.0 in)17.5 mm (0.7 in)10 years32 of 100 (Routine)
18 September 1909Leipzig-Holzhausen, DEdaily rain25.1 mm (1.0 in)12.1 mm (0.5 in)32 years31 of 100 (Routine)
18 September 1909Heinersreuth-Vollhof, DEmonthly rain25.2 mm (1.0 in)1.0 mm (0.04 in)22 years21 of 100 (Routine)
18 September 1909Stockholm, SEdaily rain14.6 mm (0.6 in)8.9 mm (0.35 in)28 years20 of 100 (Routine)
18 September 1909Berlin-Dahlem (Lfag), DEdaily rain24.7 mm (1.0 in)13.0 mm (0.5 in)3 years20 of 100 (Routine)
18 September 1909Jena Sternwarte, DEdaily rain15.5 mm (0.6 in)0.7 mm (0.03 in)62 years20 of 100 (Routine)
18 September 1909Putbus, DEdaily rain13.0 mm (0.5 in)4.2 mm (0.17 in)23 years19 of 100 (Routine)
18 September 1909Regensburg, DEdaily rain12.0 mm (0.5 in)4.5 mm (0.18 in)11 years13 of 100 (Routine)
18 September 1909Portland Rfc City, USdaily low min5.0 C (41.0 F)0.6 C (1.1 F)28 years13 of 100 (Routine)
18 September 1909Augsburg (Sankt Stephan), DEdaily rain7.1 mm (0.28 in)0.3 mm (0.01 in)26 years11 of 100 (Routine)
18 September 1909Bamberg (Sternwarte), DEdaily rain18.7 mm (0.7 in)2.3 mm (0.09 in)11 years11 of 100 (Routine)
18 September 1909Winnipeg St Johns Coll, CAdaily high min13.9 C (57.0 F)2.2 C (4.0 F)4 years8 of 100 (Routine)
18 September 1909Riva, ITdaily low max18.0 C (64.4 F)0.2 C (0.4 F)19 years8 of 100 (Routine)
18 September 1909Newcastle Nobbys Signal Statio, AUdaily rain34.0 mm (1.3 in)1.5 mm (0.06 in)6 years5 of 100 (Routine)
18 September 1909Dublin Phoenix Park, IEdaily low min (Tie)0.7 C (33.3 F)tie37 years3 of 100 (Routine)
18 September 1909Oran-Hopital Militaire, DZdaily low min (Tie)14.0 C (57.2 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

1803 to 1909
Records on 09-18 in each year Records set or tied on this calendar date in each year from 1803 to 1909. 1909 had 17 records. 05001,0001,5002,0001803: 11811: 11814: 11819: 11829: 11832: 11834: 11835: 11837: 21847: 21848: 11849: 11851: 41859: 11861: 11865: 11869: 11871: 11875: 11876: 21877: 11879: 11880: 11881: 11882: 11885: 11886: 41889: 61890: 11891: 11893: 41894: 21895: 21896: 41897: 31898: 51899: 31900: 21901: 101902: 81903: 581904: 61905: 221906: 161907: 41908: 111909: 171910: 51911: 81912: 431913: 441914: 561915: 411916: 581917: 991918: 571919: 481920: 561921: 2131922: 451923: 1141924: 621925: 2691926: 2051927: 1891928: 1141929: 3091930: 1241931: 4291932: 2261933: 3701934: 1881935: 2811936: 1551937: 4221938: 3731939: 1901940: 4021941: 3181942: 1,0011943: 6241944: 5031945: 7321946: 5761947: 9271948: 4271949: 3561950: 3701951: 3201952: 3401953: 2451954: 4461955: 6721956: 5871957: 4291958: 4911959: 8291960: 3511961: 4781962: 3601963: 4531964: 2821965: 1,1721966: 4981967: 3571968: 7631969: 4241970: 3771971: 1,2451972: 6911973: 5931974: 5591975: 9761976: 6151977: 6191978: 1,1621979: 7091980: 6521981: 1,6711982: 6031983: 9361984: 9511985: 6361986: 7301987: 1,2441988: 9971989: 7781990: 9041991: 1,3771992: 8211993: 7471994: 8521995: 9351996: 1,2371997: 9351998: 1,0381999: 5832000: 1,1462001: 9932002: 8282003: 8152004: 1,0272005: 7812006: 1,3092007: 6702008: 6972009: 6922010: 1,0402011: 1,0502012: 9222013: 6662014: 6822015: 9342016: 8932017: 5182018: 1,2002019: 7682020: 6822021: 5822022: 6132023: 6392024: 6872025: 4712026: 8641803187118971914193119481965198219992016
Records set or tied on this calendar date in each year from 1803 to 1909. 1909 had 17 records.
Counts for years before the ledger starts come from the same station rules.
Records on 09-18 in each year
YearRecords
18031
18111
18141
18191
18291
18321
18341
18351
18372
18472
18481
18491
18514
18591
18611
18651
18691
18711
18751
18762
18771
18791
18801
18811
18821
18851
18864
18896
18901
18911
18934
18942
18952
18964
18973
18985
18993
19002
190110
19028
190358
19046
190522
190616
19074
190811
190917
19105
19118
191243
191344
191456
191541
191658
191799
191857
191948
192056
1921213
192245
1923114
192462
1925269
1926205
1927189
1928114
1929309
1930124
1931429
1932226
1933370
1934188
1935281
1936155
1937422
1938373
1939190
1940402
1941318
19421,001
1943624
1944503
1945732
1946576
1947927
1948427
1949356
1950370
1951320
1952340
1953245
1954446
1955672
1956587
1957429
1958491
1959829
1960351
1961478
1962360
1963453
1964282
19651,172
1966498
1967357
1968763
1969424
1970377
19711,245
1972691
1973593
1974559
1975976
1976615
1977619
19781,162
1979709
1980652
19811,671
1982603
1983936
1984951
1985636
1986730
19871,244
1988997
1989778
1990904
19911,377
1992821
1993747
1994852
1995935
19961,237
1997935
19981,038
1999583
20001,146
2001993
2002828
2003815
20041,027
2005781
20061,309
2007670
2008697
2009692
20101,040
20111,050
2012922
2013666
2014682
2015934
2016893
2017518
20181,200
2019768
2020682
2021582
2022613
2023639
2024687
2025471
2026864

Download the Data

  • Data for records on 1909-09-18: 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).