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Built 2026-10-19 (19 October 2026)

Weather Records on 15 August 1917

32 weather records were set or tied worldwide on 15 August 1917. Highest significance: Orebro, SE.

Key Facts for 15 August 1917

  • On 15 August 1917, 32 weather records were set or tied at long-record stations worldwide.
  • 12 were record highs and 1 were record lows, counting maximum and minimum temperature.
  • By timescale, 1 were all-time records, 0 monthly and 31 daily.
  • Orebro set an all-time record daily precipitation of 71.1 mm (2.8 in) on 15 August 1917.
  • Across 168 earlier years (1793 to 2026) the same calendar date averaged 457 records.

Record Map

32 stations
Weather records on 15 August 1917 32 station records on 15 August 1917 are marked on the map, coloured by record type.
32 station records on 15 August 1917 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 15 August 1917: highest significance records shown on the map
StationCountryTypeValueSignificance
OrebroSwedenRecord daily precipitation71.1 mm (2.8 in)50 of 100 (Notable)
LundSwedenRecord daily precipitation38.6 mm (1.5 in)48 of 100 (Notable)
Vasteras-HassloSwedenRecord daily precipitation33.7 mm (1.3 in)30 of 100 (Routine)
Montreal McGillCanadaRecord daily precipitation30.5 mm (1.2 in)25 of 100 (Routine)
VastervikSwedenRecord daily precipitation17.5 mm (0.7 in)20 of 100 (Routine)
Munchen-NymphenburgGermanyRecord daily precipitation22.9 mm (0.9 in)20 of 100 (Routine)
PutbusGermanyRecord daily precipitation24.2 mm (1.0 in)20 of 100 (Routine)
StockholmSwedenRecord daily precipitation17.2 mm (0.7 in)20 of 100 (Routine)
Stromsfoss SluseNorwayRecord daily precipitation40.0 mm (1.6 in)20 of 100 (Routine)
BromeCanadaRecord daily precipitation43.2 mm (1.7 in)19 of 100 (Routine)
HvarCroatiaRecord high minimum temperature25.8 C (78.4 F)17 of 100 (Routine)
Visby_FlygplatsSwedenRecord high minimum temperature16.8 C (62.2 F)16 of 100 (Routine)
DurhamUnited KingdomRecord daily precipitation19.3 mm (0.8 in)16 of 100 (Routine)
Skara 1SwedenRecord daily precipitation18.5 mm (0.7 in)14 of 100 (Routine)
Nidingen ASwedenRecord daily precipitation17.1 mm (0.7 in)12 of 100 (Routine)
FalsterboSwedenRecord daily precipitation12.4 mm (0.5 in)11 of 100 (Routine)
GavleSwedenRecord high minimum temperature15.5 C (59.9 F)11 of 100 (Routine)
ChicoutimiCanadaRecord daily precipitation16.3 mm (0.6 in)10 of 100 (Routine)
Cardwell Marine PdeAustraliaRecord daily precipitation4.6 mm (0.18 in)9 of 100 (Routine)
BjurakerSwedenRecord high minimum temperature15.0 C (59.0 F)9 of 100 (Routine)
Zagreb-GricCroatiaRecord high maximum temperature32.2 C (90.0 F)8 of 100 (Routine)
KristianstadSwedenRecord daily precipitation15.6 mm (0.6 in)8 of 100 (Routine)
BjurakerSwedenRecord daily precipitation19.3 mm (0.8 in)8 of 100 (Routine)
NorthfieldUnited StatesRecord high minimum temperature16.7 C (62.1 F)7 of 100 (Routine)
SarnaSwedenRecord daily precipitation24.4 mm (1.0 in)6 of 100 (Routine)
ArhangelskRussiaRecord high minimum temperature16.1 C (61.0 F)3 of 100 (Routine)
HaparandaSwedenRecord high minimum temperature14.0 C (57.2 F)3 of 100 (Routine)
Sacramento 5 ESEUnited StatesRecord low minimum temperature11.1 C (52.0 F)3 of 100 (Routine)
Calgary Int'l ACanadaRecord high maximum temperature30.0 C (86.0 F)2 of 100 (Routine)
WellandCanadaRecord high maximum temperature30.0 C (86.0 F)2 of 100 (Routine)
Houston Wb CityUnited StatesRecord high minimum temperature25.6 C (78.1 F)2 of 100 (Routine)
Kingston Queens UCanadaRecord high minimum temperature21.1 C (70.0 F)1 of 100 (Routine)

Counts by Type and Timescale

32 records
Records on 15 August 1917 by type Records set or tied on 15 August 1917 by type: Highest daily maximum 3, Highest daily minimum 9, Lowest daily minimum 1, Heaviest daily rainfall 19. 05101520Highest daily maximum: 3Lowest daily maximum: 0Highest daily minimum: 9Lowest daily minimum: 1Heaviest daily rainfall: 19Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 15 August 1917 by type: Highest daily maximum 3, Highest daily minimum 9, Lowest daily minimum 1, Heaviest daily rainfall 19.
Records on 15 August 1917 by type
Record typeRecords
Highest daily maximum3
Lowest daily maximum0
Highest daily minimum9
Lowest daily minimum1
Heaviest daily rainfall19
Heaviest daily snowfall0
Deepest snow cover0
Records on 15 August 1917 by timescale Records on 15 August 1917 by timescale: all-time 1, monthly 0, daily 31. 010203040all-time: 1monthly: 0daily: 31all-timemonthlydaily
Records on 15 August 1917 by timescale: all-time 1, monthly 0, daily 31.
Records on 15 August 1917 by timescale
TimescaleRecords
all-time1
monthly0
daily31

How Much Records Were Beaten By

25 broken records
Histogram of margins by which records were beaten on 15 August 1917 Margins by which the 25 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 22.8. Ties are not counted. 051015200 to 5: 165 to 10: 510 to 15: 315 to 20: 020 to 25: 10 to 55 to 1010 to 1515 to 2020 to 25
Margins by which the 25 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 22.8. Ties are not counted.
Histogram of margins by which records were beaten on 15 August 1917
MarginRecords
0 to 516
5 to 105
10 to 153
15 to 200
20 to 251

Top 20 by Significance

15 August 1917
Top 20 records on 15 August 1917 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
15 August 1917Orebro, SEall-time rain71.1 mm (2.8 in)5.2 mm (0.20 in)56 years50 of 100 (Notable)
15 August 1917Lund, SEdaily rain38.6 mm (1.5 in)22.8 mm (0.9 in)12 years48 of 100 (Notable)
15 August 1917Vasteras-Hasslo, SEdaily rain33.7 mm (1.3 in)7.9 mm (0.31 in)38 years30 of 100 (Routine)
15 August 1917Montreal McGill, CAdaily rain30.5 mm (1.2 in)8.9 mm (0.35 in)40 years25 of 100 (Routine)
15 August 1917Vastervik, SEdaily rain17.5 mm (0.7 in)4.1 mm (0.16 in)56 years20 of 100 (Routine)
15 August 1917Munchen-Nymphenburg, DEdaily rain22.9 mm (0.9 in)10.9 mm (0.4 in)33 years20 of 100 (Routine)
15 August 1917Putbus, DEdaily rain24.2 mm (1.0 in)7.0 mm (0.28 in)25 years20 of 100 (Routine)
15 August 1917Stockholm, SEdaily rain17.2 mm (0.7 in)3.7 mm (0.15 in)38 years20 of 100 (Routine)
15 August 1917Stromsfoss Sluse, NOdaily rain40.0 mm (1.6 in)10.1 mm (0.4 in)19 years20 of 100 (Routine)
15 August 1917Brome, CAdaily rain43.2 mm (1.7 in)12.7 mm (0.5 in)12 years19 of 100 (Routine)
15 August 1917Hvar, HRdaily high min25.8 C (78.4 F)1.2 C (2.2 F)29 years17 of 100 (Routine)
15 August 1917Visby_Flygplats, SEdaily high min16.8 C (62.2 F)0.8 C (1.4 F)34 years16 of 100 (Routine)
15 August 1917Durham, GBdaily rain19.3 mm (0.8 in)6.9 mm (0.27 in)0 years16 of 100 (Routine)
15 August 1917Skara 1, SEdaily rain18.5 mm (0.7 in)2.6 mm (0.10 in)20 years14 of 100 (Routine)
15 August 1917Nidingen A, SEdaily rain17.1 mm (0.7 in)3.5 mm (0.14 in)14 years12 of 100 (Routine)
15 August 1917Falsterbo, SEdaily rain12.4 mm (0.5 in)1.0 mm (0.04 in)25 years11 of 100 (Routine)
15 August 1917Gavle, SEdaily high min15.5 C (59.9 F)1.5 C (2.7 F)16 years11 of 100 (Routine)
15 August 1917Chicoutimi, CAdaily rain16.3 mm (0.6 in)1.6 mm (0.06 in)16 years10 of 100 (Routine)
15 August 1917Cardwell Marine Pde, AUdaily rain4.6 mm (0.18 in)2.8 mm (0.11 in)8 years9 of 100 (Routine)
15 August 1917Bjuraker, SEdaily high min15.0 C (59.0 F)1.0 C (1.8 F)11 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

1793 to 1917
Records on 08-15 in each year Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 32 records. 05001,0001,5002,0001793: 21802: 11805: 11812: 11821: 11838: 21839: 11841: 11844: 11845: 31852: 11854: 11856: 11858: 11861: 31867: 11868: 21869: 11873: 21875: 11876: 21877: 11878: 11879: 11880: 31881: 21882: 21883: 11884: 21885: 31886: 11887: 11888: 31890: 21891: 21892: 31893: 31895: 11896: 91897: 31898: 11899: 21900: 61901: 51902: 101903: 51904: 171905: 261906: 81907: 141908: 151909: 301910: 161911: 261912: 341913: 421914: 111915: 261916: 2231917: 321918: 231919: 221920: 591921: 551922: 861923: 1161924: 2201925: 911926: 1151927: 2231928: 2711929: 5861930: 2741931: 3511932: 3681933: 2681934: 9921935: 4141936: 8671937: 5741938: 6811939: 4501940: 3721941: 2891942: 3771943: 4261944: 6101945: 4331946: 2851947: 5591948: 3661949: 5591950: 3171951: 5971952: 5961953: 4491954: 4811955: 5391956: 3901957: 3551958: 1,0921959: 5151960: 4171961: 7041962: 1,0521963: 9721964: 1,1851965: 5351966: 3401967: 6871968: 1,0021969: 5831970: 3821971: 8991972: 6131973: 4991974: 5121975: 4901976: 1,3451977: 5501978: 8411979: 1,7881980: 7451981: 5881982: 4791983: 9551984: 6221985: 9151986: 1,2831987: 1,0981988: 1,4791989: 4951990: 7581991: 7781992: 1,6381993: 8311994: 1,0731995: 1,2981996: 9291997: 9271998: 8611999: 9562000: 9322001: 1,2542002: 1,3072003: 1,2482004: 1,4242005: 1,0672006: 9232007: 1,3172008: 9642009: 1,0382010: 1,6222011: 7702012: 6542013: 7112014: 5832015: 7592016: 7072017: 5322018: 3282019: 4352020: 1,3272021: 9002022: 6922023: 1,4142024: 7292025: 7722026: 9751793186918911909192619431960197719942011
Records set or tied on this calendar date in each year from 1793 to 1917. 1917 had 32 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-15 in each year
YearRecords
17932
18021
18051
18121
18211
18382
18391
18411
18441
18453
18521
18541
18561
18581
18613
18671
18682
18691
18732
18751
18762
18771
18781
18791
18803
18812
18822
18831
18842
18853
18861
18871
18883
18902
18912
18923
18933
18951
18969
18973
18981
18992
19006
19015
190210
19035
190417
190526
19068
190714
190815
190930
191016
191126
191234
191342
191411
191526
1916223
191732
191823
191922
192059
192155
192286
1923116
1924220
192591
1926115
1927223
1928271
1929586
1930274
1931351
1932368
1933268
1934992
1935414
1936867
1937574
1938681
1939450
1940372
1941289
1942377
1943426
1944610
1945433
1946285
1947559
1948366
1949559
1950317
1951597
1952596
1953449
1954481
1955539
1956390
1957355
19581,092
1959515
1960417
1961704
19621,052
1963972
19641,185
1965535
1966340
1967687
19681,002
1969583
1970382
1971899
1972613
1973499
1974512
1975490
19761,345
1977550
1978841
19791,788
1980745
1981588
1982479
1983955
1984622
1985915
19861,283
19871,098
19881,479
1989495
1990758
1991778
19921,638
1993831
19941,073
19951,298
1996929
1997927
1998861
1999956
2000932
20011,254
20021,307
20031,248
20041,424
20051,067
2006923
20071,317
2008964
20091,038
20101,622
2011770
2012654
2013711
2014583
2015759
2016707
2017532
2018328
2019435
20201,327
2021900
2022692
20231,414
2024729
2025772
2026975

Download the Data

  • Data for records on 1917-08-15: 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).