Daily records
Page built 2026-10-19
Data as of 2026-10-15
Search
Built 2026-10-19 (19 October 2026)

Weather Records on 17 August 1921

37 weather records were set or tied worldwide on 17 August 1921. Highest significance: Chatham 2, CA.

Key Facts for 17 August 1921

  • On 17 August 1921, 37 weather records were set or tied at long-record stations worldwide.
  • 8 were record highs and 5 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 37 daily.
  • Chatham 2 set a daily record precipitation of 57.2 mm (2.3 in) on 17 August 1921.
  • Across 162 earlier years (1797 to 2026) the same calendar date averaged 476 records.

Record Map

37 stations
Weather records on 17 August 1921 37 station records on 17 August 1921 are marked on the map, coloured by record type.
37 station records on 17 August 1921 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 17 August 1921: highest significance records shown on the map
StationCountryTypeValueSignificance
Chatham 2CanadaRecord daily precipitation57.2 mm (2.3 in)43 of 100 (Notable)
New WestminsterCanadaRecord daily precipitation31.2 mm (1.2 in)38 of 100 (Notable)
CottamCanadaRecord daily precipitation47.0 mm (1.9 in)34 of 100 (Routine)
Sfax El-MaouTunisiaRecord low minimum temperature18.0 C (64.4 F)21 of 100 (Routine)
Mackay Post OfficeAustraliaRecord daily precipitation1.3 mm (0.05 in)19 of 100 (Routine)
Port StanleyCanadaRecord daily precipitation14.7 mm (0.6 in)17 of 100 (Routine)
TbilisiGeorgiaRecord high minimum temperature22.2 C (72.0 F)17 of 100 (Routine)
Paarl (Tnk)South AfricaRecord daily precipitation19.6 mm (0.8 in)17 of 100 (Routine)
UmanUkraineRecord high minimum temperature17.7 C (63.9 F)17 of 100 (Routine)
Owen SoundCanadaRecord daily precipitation19.3 mm (0.8 in)15 of 100 (Routine)
SyktyvkarRussiaRecord high minimum temperature16.7 C (62.1 F)15 of 100 (Routine)
LouisvilleUnited StatesRecord low maximum temperature28.3 C (82.9 F)15 of 100 (Routine)
WeldonUnited StatesRecord low minimum temperature12.2 C (54.0 F)15 of 100 (Routine)
KievUkraineRecord high minimum temperature17.6 C (63.7 F)14 of 100 (Routine)
SimferopolUkraineRecord high minimum temperature19.4 C (66.9 F)14 of 100 (Routine)
Bustard Head LighthouseAustraliaRecord daily precipitation12.4 mm (0.5 in)13 of 100 (Routine)
Woodburn Post OfficeAustraliaRecord daily precipitation13.2 mm (0.5 in)13 of 100 (Routine)
Woody IslandAustraliaRecord daily precipitation23.6 mm (0.9 in)12 of 100 (Routine)
Pacific HeightsAustraliaRecord daily precipitation1.0 mm (0.04 in)11 of 100 (Routine)
Troicko-PecherskoeRussiaRecord high minimum temperature16.2 C (61.2 F)11 of 100 (Routine)
BarkervilleCanadaRecord daily precipitation20.8 mm (0.8 in)10 of 100 (Routine)
Portland Rfc CityUnited StatesRecord daily precipitation5.8 mm (0.23 in)10 of 100 (Routine)
Rockhampton Post OfficeAustraliaRecord daily precipitation3.6 mm (0.14 in)9 of 100 (Routine)
Ulan-UdeRussiaRecord daily precipitation11.7 mm (0.5 in)9 of 100 (Routine)
Columbia Wb CityUnited StatesRecord daily precipitation19.3 mm (0.8 in)9 of 100 (Routine)
Duaringa Post OfficeAustraliaRecord daily precipitation8.9 mm (0.35 in)8 of 100 (Routine)
Double Island Point LighthouseAustraliaRecord daily precipitation10.2 mm (0.4 in)8 of 100 (Routine)
MaryboroughAustraliaRecord daily precipitation6.4 mm (0.25 in)8 of 100 (Routine)
Minto Surrey StreetAustraliaRecord daily precipitation12.7 mm (0.5 in)8 of 100 (Routine)
Spokane Intl APUnited StatesRecord daily precipitation3.3 mm (0.13 in)7 of 100 (Routine)
Robe ComparisonAustraliaRecord high minimum temperature11.9 C (53.4 F)6 of 100 (Routine)
Mt Perry the PinesAustraliaRecord daily precipitation8.6 mm (0.34 in)6 of 100 (Routine)
Marlborough Post OfficeAustraliaRecord daily precipitation0.8 mm (0.03 in)3 of 100 (Routine)
Sandy Cape LighthouseAustraliaRecord daily precipitation6.6 mm (0.26 in)3 of 100 (Routine)
TunisTunisiaRecord low maximum temperature28.0 C (82.4 F)2 of 100 (Routine)
BatesvilleUnited StatesRecord high minimum temperature23.3 C (73.9 F)2 of 100 (Routine)
New WestminsterCanadaRecord low maximum temperature16.1 C (61.0 F)1 of 100 (Routine)

Counts by Type and Timescale

37 records
Records on 17 August 1921 by type Records set or tied on 17 August 1921 by type: Lowest daily maximum 3, Highest daily minimum 8, Lowest daily minimum 2, Heaviest daily rainfall 24. 0102030Highest daily maximum: 0Lowest daily maximum: 3Highest daily minimum: 8Lowest daily minimum: 2Heaviest daily rainfall: 24Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 17 August 1921 by type: Lowest daily maximum 3, Highest daily minimum 8, Lowest daily minimum 2, Heaviest daily rainfall 24.
Records on 17 August 1921 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum3
Highest daily minimum8
Lowest daily minimum2
Heaviest daily rainfall24
Heaviest daily snowfall0
Deepest snow cover0
Records on 17 August 1921 by timescale Records on 17 August 1921 by timescale: all-time 0, monthly 0, daily 37. 010203040all-time: 0monthly: 0daily: 37all-timemonthlydaily
Records on 17 August 1921 by timescale: all-time 0, monthly 0, daily 37.
Records on 17 August 1921 by timescale
TimescaleRecords
all-time0
monthly0
daily37

How Much Records Were Beaten By

33 broken records
Histogram of margins by which records were beaten on 17 August 1921 Margins by which the 33 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 34.6. Ties are not counted. 01020300 to 5: 265 to 10: 410 to 15: 015 to 20: 120 to 25: 025 to 30: 130 to 35: 10 to 55 to 1010 to 1515 to 2020 to 2525 to 3030 to 35
Margins by which the 33 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 34.6. Ties are not counted.
Histogram of margins by which records were beaten on 17 August 1921
MarginRecords
0 to 526
5 to 104
10 to 150
15 to 201
20 to 250
25 to 301
30 to 351

Top 20 by Significance

17 August 1921
Top 20 records on 17 August 1921 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
17 August 1921Chatham 2, CAdaily rain57.2 mm (2.3 in)34.6 mm (1.4 in)33 years43 of 100 (Notable)
17 August 1921New Westminster, CAdaily rain31.2 mm (1.2 in)27.1 mm (1.1 in)8 years38 of 100 (Notable)
17 August 1921Cottam, CAdaily rain47.0 mm (1.9 in)19.8 mm (0.8 in)33 years34 of 100 (Routine)
17 August 1921Sfax El-Maou, TNdaily low min18.0 C (64.4 F)2.0 C (3.6 F)34 years21 of 100 (Routine)
17 August 1921Mackay Post Office, AUdaily rain1.3 mm (0.05 in)1.3 mm (0.05 in)46 years19 of 100 (Routine)
17 August 1921Port Stanley, CAdaily rain14.7 mm (0.6 in)0.7 mm (0.03 in)40 years17 of 100 (Routine)
17 August 1921Tbilisi, GEdaily high min22.2 C (72.0 F)1.0 C (1.8 F)31 years17 of 100 (Routine)
17 August 1921Paarl (Tnk), ZAdaily rain19.6 mm (0.8 in)4.9 mm (0.19 in)34 years17 of 100 (Routine)
17 August 1921Uman, UAdaily high min17.7 C (63.9 F)2.6 C (4.7 F)20 years17 of 100 (Routine)
17 August 1921Owen Sound, CAdaily rain19.3 mm (0.8 in)3.8 mm (0.15 in)29 years15 of 100 (Routine)
17 August 1921Syktyvkar, RUdaily high min16.7 C (62.1 F)2.3 C (4.1 F)22 years15 of 100 (Routine)
17 August 1921Louisville, USdaily low max28.3 C (82.9 F)1.7 C (3.1 F)20 years15 of 100 (Routine)
17 August 1921Weldon, USdaily low min12.2 C (54.0 F)0.9 C (1.6 F)31 years15 of 100 (Routine)
17 August 1921Kiev, UAdaily high min17.6 C (63.7 F)0.9 C (1.6 F)23 years14 of 100 (Routine)
17 August 1921Simferopol, UAdaily high min19.4 C (66.9 F)2.4 C (4.3 F)12 years14 of 100 (Routine)
17 August 1921Bustard Head Lighthouse, AUdaily rain12.4 mm (0.5 in)5.0 mm (0.20 in)20 years13 of 100 (Routine)
17 August 1921Woodburn Post Office, AUdaily rain13.2 mm (0.5 in)4.1 mm (0.16 in)27 years13 of 100 (Routine)
17 August 1921Woody Island, AUdaily rain23.6 mm (0.9 in)7.1 mm (0.28 in)12 years12 of 100 (Routine)
17 August 1921Pacific Heights, AUdaily rain1.0 mm (0.04 in)1.0 mm (0.04 in)27 years11 of 100 (Routine)
17 August 1921Troicko-Pecherskoe, RUdaily high min16.2 C (61.2 F)1.2 C (2.2 F)19 years11 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 1921
Records on 08-17 in each year Records set or tied on this calendar date in each year from 1797 to 1921. 1921 had 37 records. 05001,0001,5002,0001797: 21802: 21820: 21837: 11838: 21841: 21842: 11845: 21853: 11854: 11856: 11857: 11861: 31862: 11867: 11868: 31869: 11872: 11875: 21876: 51879: 11881: 11882: 11883: 21885: 31886: 11888: 51891: 11892: 31893: 21894: 31895: 21896: 31897: 11898: 51899: 81900: 31901: 141902: 71903: 61904: 21905: 111906: 281907: 91908: 261909: 241910: 171911: 181912: 311913: 791914: 411915: 281916: 331917: 351918: 1121919: 371920: 1101921: 371922: 1691923: 1611924: 1711925: 1301926: 1821927: 2281928: 1311929: 2431930: 1381931: 3021932: 3601933: 2601934: 3771935: 4371936: 6701937: 7261938: 4661939: 3641940: 3411941: 3781942: 4611943: 7431944: 5311945: 3871946: 4331947: 6821948: 4751949: 3711950: 5221951: 4131952: 4701953: 3451954: 6851955: 4651956: 4071957: 5041958: 5191959: 5431960: 5331961: 9981962: 4451963: 6501964: 4101965: 6411966: 4961967: 6791968: 9531969: 5931970: 4671971: 4471972: 1,0441973: 7501974: 5821975: 6121976: 7971977: 1,2161978: 8141979: 1,4641980: 8951981: 1,1121982: 5541983: 1,5741984: 7261985: 9481986: 9161987: 1,1501988: 1,6081989: 6871990: 9491991: 5601992: 1,8131993: 8031994: 1,0381995: 1,7241996: 7521997: 1,5441998: 1,0031999: 6972000: 9942001: 1,1012002: 1,2662003: 9482004: 1,0462005: 7222006: 8142007: 1,6462008: 1,3012009: 9222010: 1,1052011: 9562012: 1,2152013: 8022014: 9972015: 8902016: 7482017: 5442018: 5182019: 4672020: 1,5292021: 8002022: 1,4282023: 1,0322024: 7402025: 5382026: 5351797187218981915193219491966198320002017
Records set or tied on this calendar date in each year from 1797 to 1921. 1921 had 37 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-17 in each year
YearRecords
17972
18022
18202
18371
18382
18412
18421
18452
18531
18541
18561
18571
18613
18621
18671
18683
18691
18721
18752
18765
18791
18811
18821
18832
18853
18861
18885
18911
18923
18932
18943
18952
18963
18971
18985
18998
19003
190114
19027
19036
19042
190511
190628
19079
190826
190924
191017
191118
191231
191379
191441
191528
191633
191735
1918112
191937
1920110
192137
1922169
1923161
1924171
1925130
1926182
1927228
1928131
1929243
1930138
1931302
1932360
1933260
1934377
1935437
1936670
1937726
1938466
1939364
1940341
1941378
1942461
1943743
1944531
1945387
1946433
1947682
1948475
1949371
1950522
1951413
1952470
1953345
1954685
1955465
1956407
1957504
1958519
1959543
1960533
1961998
1962445
1963650
1964410
1965641
1966496
1967679
1968953
1969593
1970467
1971447
19721,044
1973750
1974582
1975612
1976797
19771,216
1978814
19791,464
1980895
19811,112
1982554
19831,574
1984726
1985948
1986916
19871,150
19881,608
1989687
1990949
1991560
19921,813
1993803
19941,038
19951,724
1996752
19971,544
19981,003
1999697
2000994
20011,101
20021,266
2003948
20041,046
2005722
2006814
20071,646
20081,301
2009922
20101,105
2011956
20121,215
2013802
2014997
2015890
2016748
2017544
2018518
2019467
20201,529
2021800
20221,428
20231,032
2024740
2025538
2026535

Download the Data

  • Data for records on 1921-08-17: 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).