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Built 2026-10-19 (19 October 2026)

Weather Records on 25 August 1909

22 weather records were set or tied worldwide on 25 August 1909. Highest significance: Den Helder-1, NL.

Key Facts for 25 August 1909

  • On 25 August 1909, 22 weather records were set or tied at long-record stations worldwide.
  • 16 were record highs and 2 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 22 daily.
  • Den Helder-1 set a daily record precipitation of 32.0 mm (1.3 in) on 25 August 1909.
  • Across 168 earlier years (1796 to 2026) the same calendar date averaged 440 records.

Record Map

22 stations
Weather records on 25 August 1909 22 station records on 25 August 1909 are marked on the map, coloured by record type.
22 station records on 25 August 1909 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 25 August 1909: highest significance records shown on the map
StationCountryTypeValueSignificance
Den Helder-1NetherlandsRecord daily precipitation32.0 mm (1.3 in)23 of 100 (Routine)
TorontoCanadaRecord high maximum temperature35.6 C (96.1 F)22 of 100 (Routine)
Gabo Island LighthouseAustraliaRecord daily precipitation11.2 mm (0.4 in)20 of 100 (Routine)
WoodstockCanadaRecord high maximum temperature33.3 C (91.9 F)17 of 100 (Routine)
Kirchdorf/PoelGermanyRecord daily precipitation15.4 mm (0.6 in)17 of 100 (Routine)
Toledo BladeUnited StatesRecord high maximum temperature32.8 C (91.0 F)17 of 100 (Routine)
StratfordCanadaRecord high maximum temperature32.2 C (90.0 F)16 of 100 (Routine)
La Crosse Wb CityUnited StatesRecord high maximum temperature32.2 C (90.0 F)14 of 100 (Routine)
Port ArthurCanadaRecord high minimum temperature15.6 C (60.1 F)12 of 100 (Routine)
SouthamptonCanadaRecord high minimum temperature21.1 C (70.0 F)12 of 100 (Routine)
PortlandUnited StatesRecord high maximum temperature34.4 C (93.9 F)12 of 100 (Routine)
ConcordUnited StatesRecord high maximum temperature33.9 C (93.0 F)12 of 100 (Routine)
Cleveland 2717 EuclidUnited StatesRecord high minimum temperature21.7 C (71.1 F)8 of 100 (Routine)
PeterboroughCanadaRecord high maximum temperature33.3 C (91.9 F)7 of 100 (Routine)
Montreal McGillCanadaRecord high maximum temperature30.6 C (87.1 F)6 of 100 (Routine)
Montreal McGillCanadaRecord high minimum temperature21.1 C (70.0 F)6 of 100 (Routine)
Nora_DSwedenRecord daily precipitation9.6 mm (0.38 in)6 of 100 (Routine)
Melbourne Regional OfficeAustraliaRecord low minimum temperature0.3 C (32.5 F)4 of 100 (Routine)
Milwaukee Wb CityUnited StatesRecord high minimum temperature22.8 C (73.0 F)4 of 100 (Routine)
Winnemucca APUnited StatesRecord low minimum temperature4.4 C (39.9 F)4 of 100 (Routine)
SouthamptonCanadaRecord high maximum temperature28.9 C (84.0 F)1 of 100 (Routine)
StratfordCanadaRecord high minimum temperature20.6 C (69.1 F)1 of 100 (Routine)

Counts by Type and Timescale

22 records
Records on 25 August 1909 by type Records set or tied on 25 August 1909 by type: Highest daily maximum 10, Highest daily minimum 6, Lowest daily minimum 2, Heaviest daily rainfall 4. 035810Highest daily maximum: 10Lowest daily maximum: 0Highest daily minimum: 6Lowest daily minimum: 2Heaviest daily rainfall: 4Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 25 August 1909 by type: Highest daily maximum 10, Highest daily minimum 6, Lowest daily minimum 2, Heaviest daily rainfall 4.
Records on 25 August 1909 by type
Record typeRecords
Highest daily maximum10
Lowest daily maximum0
Highest daily minimum6
Lowest daily minimum2
Heaviest daily rainfall4
Heaviest daily snowfall0
Deepest snow cover0
Records on 25 August 1909 by timescale Records on 25 August 1909 by timescale: all-time 0, monthly 0, daily 22. 0102030all-time: 0monthly: 0daily: 22all-timemonthlydaily
Records on 25 August 1909 by timescale: all-time 0, monthly 0, daily 22.
Records on 25 August 1909 by timescale
TimescaleRecords
all-time0
monthly0
daily22

How Much Records Were Beaten By

19 broken records
Histogram of margins by which records were beaten on 25 August 1909 Margins by which the 19 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 6.4. Ties are not counted. 0358100 to 1: 91 to 2: 32 to 3: 33 to 4: 14 to 5: 25 to 6: 06 to 7: 10 to 11 to 22 to 33 to 44 to 55 to 66 to 7
Margins by which the 19 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 6.4. Ties are not counted.
Histogram of margins by which records were beaten on 25 August 1909
MarginRecords
0 to 19
1 to 23
2 to 33
3 to 41
4 to 52
5 to 60
6 to 71

Top 20 by Significance

25 August 1909
Top 20 records on 25 August 1909 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
25 August 1909Den Helder-1, NLdaily rain32.0 mm (1.3 in)4.1 mm (0.16 in)41 years23 of 100 (Routine)
25 August 1909Toronto, CAdaily high max35.6 C (96.1 F)4.5 C (8.1 F)8 years22 of 100 (Routine)
25 August 1909Gabo Island Lighthouse, AUdaily rain11.2 mm (0.4 in)6.4 mm (0.25 in)44 years20 of 100 (Routine)
25 August 1909Woodstock, CAdaily high max33.3 C (91.9 F)3.3 C (5.9 F)20 years17 of 100 (Routine)
25 August 1909Kirchdorf/Poel, DEdaily rain15.4 mm (0.6 in)2.1 mm (0.08 in)30 years17 of 100 (Routine)
25 August 1909Toledo Blade, USdaily high max32.8 C (91.0 F)1.7 C (3.1 F)35 years17 of 100 (Routine)
25 August 1909Stratford, CAdaily high max32.2 C (90.0 F)1.6 C (2.9 F)27 years16 of 100 (Routine)
25 August 1909La Crosse Wb City, USdaily high max32.2 C (90.0 F)0.5 C (0.9 F)35 years14 of 100 (Routine)
25 August 1909Port Arthur, CAdaily high min15.6 C (60.1 F)0.6 C (1.1 F)26 years12 of 100 (Routine)
25 August 1909Southampton, CAdaily high min21.1 C (70.0 F)2.2 C (4.0 F)15 years12 of 100 (Routine)
25 August 1909Portland, USdaily high max34.4 C (93.9 F)2.2 C (4.0 F)15 years12 of 100 (Routine)
25 August 1909Concord, USdaily high max33.9 C (93.0 F)1.7 C (3.1 F)14 years12 of 100 (Routine)
25 August 1909Cleveland 2717 Euclid, USdaily high min21.7 C (71.1 F)0.6 C (1.1 F)15 years8 of 100 (Routine)
25 August 1909Peterborough, CAdaily high max33.3 C (91.9 F)0.5 C (0.9 F)8 years7 of 100 (Routine)
25 August 1909Montreal McGill, CAdaily high max30.6 C (87.1 F)0.6 C (1.1 F)8 years6 of 100 (Routine)
25 August 1909Montreal McGill, CAdaily high min21.1 C (70.0 F)0.5 C (0.9 F)8 years6 of 100 (Routine)
25 August 1909Nora_D, SEdaily rain9.6 mm (0.38 in)0.8 mm (0.03 in)7 years6 of 100 (Routine)
25 August 1909Melbourne Regional Office, AUdaily low min (Tie)0.3 C (32.5 F)tie44 years4 of 100 (Routine)
25 August 1909Milwaukee Wb City, USdaily high min22.8 C (73.0 F)0.6 C (1.1 F)3 years4 of 100 (Routine)
25 August 1909Winnemucca AP, USdaily low min4.4 C (39.9 F)0.6 C (1.1 F)3 years4 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

1796 to 1909
Records on 08-25 in each year Records set or tied on this calendar date in each year from 1796 to 1909. 1909 had 22 records. 05001,0001,5002,0001796: 11801: 11802: 11807: 21809: 11813: 11814: 11816: 11818: 21837: 11838: 21839: 11848: 11852: 11855: 21859: 11861: 21864: 11867: 21869: 11870: 11871: 21872: 21875: 11876: 51877: 31879: 31880: 21884: 11885: 21886: 11887: 11889: 11890: 31892: 41893: 81894: 21895: 41896: 21897: 21898: 21899: 51900: 131901: 111902: 61903: 131904: 111905: 121906: 291907: 151908: 131909: 221910: 321911: 321912: 321913: 311914: 301915: 941916: 181917: 651918: 371919: 1721920: 1741921: 501922: 701923: 1171924: 4021925: 1451926: 2241927: 3561928: 1671929: 1741930: 2471931: 2511932: 2701933: 3071934: 4571935: 3171936: 8591937: 3331938: 6201939: 3661940: 6581941: 4741942: 5141943: 4961944: 5891945: 4621946: 3051947: 6271948: 8761949: 2811950: 3271951: 3521952: 5851953: 4611954: 5201955: 7111956: 2731957: 4791958: 9581959: 5761960: 5851961: 4871962: 3981963: 5101964: 5571965: 4011966: 7151967: 4391968: 5961969: 6311970: 7211971: 6281972: 5961973: 5371974: 4661975: 6501976: 4591977: 7311978: 7021979: 8281980: 7501981: 6711982: 9071983: 1,2771984: 6941985: 1,0481986: 7781987: 1,5331988: 8151989: 9181990: 8171991: 6881992: 1,6801993: 1,1371994: 6171995: 1,2061996: 1,0581997: 1,5531998: 1,1381999: 8952000: 7902001: 1,0212002: 1,0732003: 8722004: 9472005: 8742006: 1,0202007: 1,3452008: 1,0262009: 8242010: 1,3212011: 1,3322012: 7092013: 6192014: 8532015: 1,1572016: 8872017: 4322018: 4382019: 7082020: 9312021: 5972022: 6722023: 1,5652024: 9092025: 1,0712026: 8861796186418921909192619431960197719942011
Records set or tied on this calendar date in each year from 1796 to 1909. 1909 had 22 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-25 in each year
YearRecords
17961
18011
18021
18072
18091
18131
18141
18161
18182
18371
18382
18391
18481
18521
18552
18591
18612
18641
18672
18691
18701
18712
18722
18751
18765
18773
18793
18802
18841
18852
18861
18871
18891
18903
18924
18938
18942
18954
18962
18972
18982
18995
190013
190111
19026
190313
190411
190512
190629
190715
190813
190922
191032
191132
191232
191331
191430
191594
191618
191765
191837
1919172
1920174
192150
192270
1923117
1924402
1925145
1926224
1927356
1928167
1929174
1930247
1931251
1932270
1933307
1934457
1935317
1936859
1937333
1938620
1939366
1940658
1941474
1942514
1943496
1944589
1945462
1946305
1947627
1948876
1949281
1950327
1951352
1952585
1953461
1954520
1955711
1956273
1957479
1958958
1959576
1960585
1961487
1962398
1963510
1964557
1965401
1966715
1967439
1968596
1969631
1970721
1971628
1972596
1973537
1974466
1975650
1976459
1977731
1978702
1979828
1980750
1981671
1982907
19831,277
1984694
19851,048
1986778
19871,533
1988815
1989918
1990817
1991688
19921,680
19931,137
1994617
19951,206
19961,058
19971,553
19981,138
1999895
2000790
20011,021
20021,073
2003872
2004947
2005874
20061,020
20071,345
20081,026
2009824
20101,321
20111,332
2012709
2013619
2014853
20151,157
2016887
2017432
2018438
2019708
2020931
2021597
2022672
20231,565
2024909
20251,071
2026886

Download the Data

  • Data for records on 1909-08-25: 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).