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Built 2026-10-19 (19 October 2026)

Weather Records on 27 September 1917

41 weather records were set or tied worldwide on 27 September 1917. Highest significance: Saint John, CA.

Key Facts for 27 September 1917

  • On 27 September 1917, 41 weather records were set or tied at long-record stations worldwide.
  • 31 were record highs and 0 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 41 daily.
  • Saint John set a daily record high maximum temperature of 25.6 C (78.1 F) on 27 September 1917.
  • Across 154 earlier years (1799 to 2026) the same calendar date averaged 453 records.

Record Map

41 stations
Weather records on 27 September 1917 41 station records on 27 September 1917 are marked on the map, coloured by record type.
41 station records on 27 September 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 27 September 1917: highest significance records shown on the map
StationCountryTypeValueSignificance
Saint JohnCanadaRecord high maximum temperature25.6 C (78.1 F)25 of 100 (Routine)
Kola-In-MurmanRussiaRecord daily precipitation19.0 mm (0.7 in)20 of 100 (Routine)
JokkmokkSwedenRecord daily precipitation11.6 mm (0.5 in)20 of 100 (Routine)
OrilliaCanadaRecord daily precipitation21.6 mm (0.9 in)20 of 100 (Routine)
NicosiaCyprusRecord daily precipitation5.3 mm (0.21 in)18 of 100 (Routine)
Montgomery Wb CityUnited StatesRecord daily precipitation88.1 mm (3.5 in)18 of 100 (Routine)
St. PetersburgRussiaRecord high maximum temperature21.5 C (70.7 F)16 of 100 (Routine)
Adelaide West TerraceAustraliaRecord high maximum temperature26.1 C (79.0 F)14 of 100 (Routine)
Cobar Post OfficeAustraliaRecord high maximum temperature29.4 C (84.9 F)14 of 100 (Routine)
Stony MountainCanadaRecord daily precipitation3.3 mm (0.13 in)14 of 100 (Routine)
SydneyCanadaRecord high maximum temperature29.4 C (84.9 F)14 of 100 (Routine)
PlauenGermanyRecord high maximum temperature25.3 C (77.5 F)14 of 100 (Routine)
VanersborgSwedenRecord high minimum temperature11.0 C (51.8 F)14 of 100 (Routine)
NurnbergGermanyRecord high minimum temperature12.8 C (55.0 F)13 of 100 (Routine)
HalmstadSwedenRecord high minimum temperature12.5 C (54.5 F)13 of 100 (Routine)
Darwin Post OfficeAustraliaRecord high minimum temperature26.4 C (79.5 F)12 of 100 (Routine)
ArnsbergGermanyRecord high minimum temperature14.4 C (57.9 F)12 of 100 (Routine)
PlauenGermanyRecord high minimum temperature13.1 C (55.6 F)12 of 100 (Routine)
St. PetersburgRussiaRecord high minimum temperature11.8 C (53.2 F)12 of 100 (Routine)
Visby_FlygplatsSwedenRecord high minimum temperature11.8 C (53.2 F)12 of 100 (Routine)
Linkoeping-MalmslaettSwedenRecord high minimum temperature12.0 C (53.6 F)12 of 100 (Routine)
BorasSwedenRecord high minimum temperature10.5 C (50.9 F)10 of 100 (Routine)
Munchen-NymphenburgGermanyRecord high minimum temperature12.8 C (55.0 F)9 of 100 (Routine)
HohenpeissenbergGermanyRecord high minimum temperature15.4 C (59.7 F)9 of 100 (Routine)
Rapid City ForrestCanadaRecord daily precipitation5.1 mm (0.20 in)8 of 100 (Routine)
Koebenhavn: Landbohojskolen-1DenmarkRecord high minimum temperature12.9 C (55.2 F)8 of 100 (Routine)
ArhangelskRussiaRecord daily precipitation10.7 mm (0.4 in)8 of 100 (Routine)
VastervikSwedenRecord high minimum temperature12.4 C (54.3 F)8 of 100 (Routine)
Uppsala_AutSwedenRecord high minimum temperature11.8 C (53.2 F)8 of 100 (Routine)
LenoirUnited StatesRecord daily precipitation13.7 mm (0.5 in)8 of 100 (Routine)
TartuEstoniaRecord high minimum temperature11.5 C (52.7 F)7 of 100 (Routine)
JonkopingSwedenRecord high minimum temperature12.0 C (53.6 F)7 of 100 (Routine)
InnsbruckAustriaRecord high maximum temperature24.3 C (75.7 F)6 of 100 (Routine)
Bonang (Goomgerah)AustraliaRecord daily precipitation28.7 mm (1.1 in)5 of 100 (Routine)
MagdeburgGermanyRecord high minimum temperature14.9 C (58.8 F)5 of 100 (Routine)
OrebroSwedenRecord high minimum temperature11.0 C (51.8 F)2 of 100 (Routine)
San Diego WboUnited StatesRecord high maximum temperature32.2 C (90.0 F)2 of 100 (Routine)
ChathamCanadaRecord high maximum temperature27.8 C (82.0 F)1 of 100 (Routine)
Fredericton UnbCanadaRecord high maximum temperature27.2 C (81.0 F)1 of 100 (Routine)
PortlandUnited StatesRecord high maximum temperature23.3 C (73.9 F)1 of 100 (Routine)
Blue Hill CoopUnited StatesRecord high minimum temperature15.6 C (60.1 F)1 of 100 (Routine)

Counts by Type and Timescale

41 records
Records on 27 September 1917 by type Records set or tied on 27 September 1917 by type: Highest daily maximum 11, Highest daily minimum 20, Heaviest daily rainfall 10. 05101520Highest daily maximum: 11Lowest daily maximum: 0Highest daily minimum: 20Lowest daily minimum: 0Heaviest daily rainfall: 10Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 27 September 1917 by type: Highest daily maximum 11, Highest daily minimum 20, Heaviest daily rainfall 10.
Records on 27 September 1917 by type
Record typeRecords
Highest daily maximum11
Lowest daily maximum0
Highest daily minimum20
Lowest daily minimum0
Heaviest daily rainfall10
Heaviest daily snowfall0
Deepest snow cover0
Records on 27 September 1917 by timescale Records on 27 September 1917 by timescale: all-time 0, monthly 0, daily 41. 0204060all-time: 0monthly: 0daily: 41all-timemonthlydaily
Records on 27 September 1917 by timescale: all-time 0, monthly 0, daily 41.
Records on 27 September 1917 by timescale
TimescaleRecords
all-time0
monthly0
daily41

How Much Records Were Beaten By

35 broken records
Histogram of margins by which records were beaten on 27 September 1917 Margins by which the 35 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 14.1. Ties are not counted. 01020300 to 2: 232 to 4: 94 to 6: 26 to 8: 08 to 10: 010 to 12: 012 to 14: 014 to 16: 10 to 22 to 44 to 66 to 88 to 1010 to 1212 to 1414 to 16
Margins by which the 35 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 14.1. Ties are not counted.
Histogram of margins by which records were beaten on 27 September 1917
MarginRecords
0 to 223
2 to 49
4 to 62
6 to 80
8 to 100
10 to 120
12 to 140
14 to 161

Top 20 by Significance

27 September 1917
Top 20 records on 27 September 1917 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
27 September 1917Saint John, CAdaily high max25.6 C (78.1 F)2.8 C (5.0 F)42 years25 of 100 (Routine)
27 September 1917Kola-In-Murman, RUdaily rain19.0 mm (0.7 in)14.1 mm (0.6 in)18 years20 of 100 (Routine)
27 September 1917Jokkmokk, SEdaily rain11.6 mm (0.5 in)3.0 mm (0.12 in)38 years20 of 100 (Routine)
27 September 1917Orillia, CAdaily rain21.6 mm (0.9 in)3.1 mm (0.12 in)43 years20 of 100 (Routine)
27 September 1917Nicosia, CYdaily rain5.3 mm (0.21 in)5.2 mm (0.20 in)33 years18 of 100 (Routine)
27 September 1917Montgomery Wb City, USdaily rain88.1 mm (3.5 in)3.3 mm (0.13 in)41 years18 of 100 (Routine)
27 September 1917St. Petersburg, RUdaily high max21.5 C (70.7 F)4.2 C (7.6 F)12 years16 of 100 (Routine)
27 September 1917Adelaide West Terrace, AUdaily high max26.1 C (79.0 F)1.2 C (2.2 F)28 years14 of 100 (Routine)
27 September 1917Cobar Post Office, AUdaily high max29.4 C (84.9 F)0.5 C (0.9 F)33 years14 of 100 (Routine)
27 September 1917Stony Mountain, CAdaily rain3.3 mm (0.13 in)0.3 mm (0.01 in)35 years14 of 100 (Routine)
27 September 1917Sydney, CAdaily high max29.4 C (84.9 F)3.3 C (5.9 F)8 years14 of 100 (Routine)
27 September 1917Plauen, DEdaily high max25.3 C (77.5 F)2.8 C (5.0 F)19 years14 of 100 (Routine)
27 September 1917Vanersborg, SEdaily high min11.0 C (51.8 F)1.0 C (1.8 F)26 years14 of 100 (Routine)
27 September 1917Nurnberg, DEdaily high min12.8 C (55.0 F)0.7 C (1.3 F)26 years13 of 100 (Routine)
27 September 1917Halmstad, SEdaily high min12.5 C (54.5 F)0.5 C (0.9 F)30 years13 of 100 (Routine)
27 September 1917Darwin Post Office, AUdaily high min26.4 C (79.5 F)0.3 C (0.5 F)24 years12 of 100 (Routine)
27 September 1917Arnsberg, DEdaily high min14.4 C (57.9 F)0.5 C (0.9 F)26 years12 of 100 (Routine)
27 September 1917Plauen, DEdaily high min13.1 C (55.6 F)0.4 C (0.7 F)26 years12 of 100 (Routine)
27 September 1917St. Petersburg, RUdaily high min11.8 C (53.2 F)1.7 C (3.1 F)14 years12 of 100 (Routine)
27 September 1917Visby_Flygplats, SEdaily high min11.8 C (53.2 F)0.3 C (0.5 F)26 years12 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

1799 to 1917
Records on 09-27 in each year Records set or tied on this calendar date in each year from 1799 to 1917. 1917 had 41 records. 05001,0001,5002,0001799: 11828: 11836: 21847: 11851: 11854: 21855: 21859: 21866: 21867: 31874: 11875: 11877: 21880: 11881: 41882: 11885: 51887: 11890: 31891: 11892: 11893: 11894: 51895: 61896: 11897: 21898: 41899: 11900: 51901: 31902: 121903: 71904: 121905: 211906: 211907: 91908: 361909: 171910: 201911: 311912: 251913: 271914: 241915: 801916: 571917: 411918: 581919: 451920: 541921: 261922: 1111923: 1251924: 1151925: 1291926: 5811927: 2441928: 2881929: 2251930: 1781931: 2221932: 1941933: 5591934: 2981935: 3191936: 4351937: 3091938: 3661939: 5721940: 7061941: 2571942: 1,3531943: 5031944: 3231945: 4751946: 3871947: 8131948: 4051949: 4071950: 2231951: 4801952: 5391953: 5671954: 5071955: 3861956: 8251957: 6441958: 5851959: 5821960: 3371961: 3761962: 3521963: 8491964: 7241965: 6881966: 4261967: 5021968: 2861969: 2331970: 7731971: 7621972: 9891973: 1,0311974: 4081975: 7901976: 9051977: 8521978: 7731979: 7411980: 5591981: 6801982: 1,0761983: 7911984: 1,2971985: 6611986: 1,7721987: 1,0131988: 4941989: 8521990: 3791991: 8941992: 6591993: 7271994: 7641995: 6981996: 1,4681997: 7301998: 1,7741999: 1,0592000: 1,0312001: 9802002: 9922003: 8302004: 6652005: 1,0612006: 5962007: 1,0912008: 6592009: 9872010: 1,1532011: 9652012: 6242013: 8232014: 8132015: 6642016: 6002017: 8912018: 6002019: 7552020: 6592021: 8932022: 6422023: 7472024: 1,4492025: 2722026: 3581799188519041920193619521968198420002016
Records set or tied on this calendar date in each year from 1799 to 1917. 1917 had 41 records.
Counts for years before the ledger starts come from the same station rules.
Records on 09-27 in each year
YearRecords
17991
18281
18362
18471
18511
18542
18552
18592
18662
18673
18741
18751
18772
18801
18814
18821
18855
18871
18903
18911
18921
18931
18945
18956
18961
18972
18984
18991
19005
19013
190212
19037
190412
190521
190621
19079
190836
190917
191020
191131
191225
191327
191424
191580
191657
191741
191858
191945
192054
192126
1922111
1923125
1924115
1925129
1926581
1927244
1928288
1929225
1930178
1931222
1932194
1933559
1934298
1935319
1936435
1937309
1938366
1939572
1940706
1941257
19421,353
1943503
1944323
1945475
1946387
1947813
1948405
1949407
1950223
1951480
1952539
1953567
1954507
1955386
1956825
1957644
1958585
1959582
1960337
1961376
1962352
1963849
1964724
1965688
1966426
1967502
1968286
1969233
1970773
1971762
1972989
19731,031
1974408
1975790
1976905
1977852
1978773
1979741
1980559
1981680
19821,076
1983791
19841,297
1985661
19861,772
19871,013
1988494
1989852
1990379
1991894
1992659
1993727
1994764
1995698
19961,468
1997730
19981,774
19991,059
20001,031
2001980
2002992
2003830
2004665
20051,061
2006596
20071,091
2008659
2009987
20101,153
2011965
2012624
2013823
2014813
2015664
2016600
2017891
2018600
2019755
2020659
2021893
2022642
2023747
20241,449
2025272
2026358

Download the Data

  • Data for records on 1917-09-27: 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).