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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Weather Records on 20 August 1863

5 weather records were set or tied worldwide on 20 August 1863. Highest significance: Milan, IT.

Key Facts for 20 August 1863

  • On 20 August 1863, 5 weather records were set or tied at long-record stations worldwide.
  • 0 were record highs and 4 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 1 monthly and 4 daily.
  • Milan set a daily record low maximum temperature of 16.4 C (61.5 F) on 20 August 1863.
  • Across 162 earlier years (1797 to 2025) the same calendar date averaged 454 records.

Record Map

5 stations
Weather records on 20 August 1863 5 station records on 20 August 1863 are marked on the map, coloured by record type.
5 station records on 20 August 1863 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 20 August 1863: highest significance records shown on the map
StationCountryTypeValueSignificance
MilanItalyRecord low maximum temperature16.4 C (61.5 F)47 of 100 (Notable)
MilanItalyRecord low minimum temperature9.0 C (48.2 F)23 of 100 (Routine)
BolognaItalyRecord low minimum temperature11.0 C (51.8 F)16 of 100 (Routine)
OxfordUnited KingdomRecord low minimum temperature5.9 C (42.6 F)16 of 100 (Routine)
BolognaItalyRecord daily precipitation23.0 mm (0.9 in)14 of 100 (Routine)

Counts by Type and Timescale

5 records
Records on 20 August 1863 by type Records set or tied on 20 August 1863 by type: Lowest daily maximum 1, Lowest daily minimum 3, Heaviest daily rainfall 1. 0123Highest daily maximum: 0Lowest daily maximum: 1Highest daily minimum: 0Lowest daily minimum: 3Heaviest daily rainfall: 1Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 20 August 1863 by type: Lowest daily maximum 1, Lowest daily minimum 3, Heaviest daily rainfall 1.
Records on 20 August 1863 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum1
Highest daily minimum0
Lowest daily minimum3
Heaviest daily rainfall1
Heaviest daily snowfall0
Deepest snow cover0
Records on 20 August 1863 by timescale Records on 20 August 1863 by timescale: all-time 0, monthly 1, daily 4. 01234all-time: 0monthly: 1daily: 4all-timemonthlydaily
Records on 20 August 1863 by timescale: all-time 0, monthly 1, daily 4.
Records on 20 August 1863 by timescale
TimescaleRecords
all-time0
monthly1
daily4

How Much Records Were Beaten By

5 broken records
Histogram of margins by which records were beaten on 20 August 1863 Margins by which the 5 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 6.5. Ties are not counted. 011220 to 1: 21 to 2: 02 to 3: 23 to 4: 04 to 5: 05 to 6: 06 to 7: 10 to 11 to 22 to 33 to 44 to 55 to 66 to 7
Margins by which the 5 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 6.5. Ties are not counted.
Histogram of margins by which records were beaten on 20 August 1863
MarginRecords
0 to 12
1 to 20
2 to 32
3 to 40
4 to 50
5 to 60
6 to 71

Top 20 by Significance

20 August 1863
Top 5 records on 20 August 1863 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
20 August 1863Milan, ITdaily low max16.4 C (61.5 F)2.6 C (4.7 F)98 years47 of 100 (Notable)
20 August 1863Milan, ITmonthly low min9.0 C (48.2 F)0.1 C (0.2 F)11 years23 of 100 (Routine)
20 August 1863Bologna, ITdaily low min11.0 C (51.8 F)2.9 C (5.2 F)4 years16 of 100 (Routine)
20 August 1863Oxford, GBdaily low min5.9 C (42.6 F)0.2 C (0.4 F)42 years16 of 100 (Routine)
20 August 1863Bologna, ITdaily rain23.0 mm (0.9 in)6.5 mm (0.26 in)10 years14 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 1863
Records on 08-20 in each year Records set or tied on this calendar date in each year from 1797 to 1863. 1863 had 5 records. 05001,0001,5002,0001797: 11807: 11809: 21816: 11830: 11832: 11838: 11840: 11842: 11846: 11849: 11850: 11852: 11858: 31863: 51867: 41870: 31871: 11873: 11875: 21877: 11883: 21884: 21885: 61886: 11888: 11889: 21890: 21891: 21892: 61893: 11894: 11895: 11896: 51897: 61898: 11899: 51900: 71901: 121902: 31903: 71904: 301905: 71906: 261907: 151908: 211909: 691910: 71911: 181912: 251913: 231914: 151915: 141916: 741917: 511918: 691919: 251920: 471921: 231922: 521923: 831924: 1321925: 1931926: 1871927: 3381928: 1011929: 2131930: 3181931: 2141932: 2991933: 3241934: 3761935: 3391936: 5431937: 5371938: 2501939: 4481940: 6951941: 2301942: 4291943: 4361944: 3551945: 3981946: 3491947: 9881948: 4031949: 4311950: 1,3411951: 8241952: 4251953: 4411954: 4761955: 8481956: 6781957: 3421958: 2811959: 7641960: 4651961: 5201962: 6841963: 5771964: 6291965: 4701966: 1,0941967: 6571968: 8621969: 6081970: 4141971: 5851972: 5221973: 4901974: 5651975: 4111976: 8941977: 8601978: 5631979: 1,0091980: 9911981: 8561982: 6201983: 1,4651984: 6961985: 6661986: 8191987: 5641988: 9911989: 6031990: 1,2621991: 8041992: 1,1681993: 7591994: 7191995: 1,1131996: 9001997: 1,2141998: 8021999: 8102000: 9892001: 9092002: 1,2082003: 1,0312004: 1,3332005: 1,1122006: 8512007: 1,9552008: 1,1702009: 1,4142010: 1,0282011: 9872012: 1,0862013: 5452014: 5822015: 1,0752016: 8702017: 3242018: 6532019: 6952020: 1,0462021: 1,0202022: 1,0382023: 1,4702024: 5892025: 1,1351797187118971914193119481965198219992016
Records set or tied on this calendar date in each year from 1797 to 1863. 1863 had 5 records.
Counts for years before the ledger starts come from the same station rules.
Records on 08-20 in each year
YearRecords
17971
18071
18092
18161
18301
18321
18381
18401
18421
18461
18491
18501
18521
18583
18635
18674
18703
18711
18731
18752
18771
18832
18842
18856
18861
18881
18892
18902
18912
18926
18931
18941
18951
18965
18976
18981
18995
19007
190112
19023
19037
190430
19057
190626
190715
190821
190969
19107
191118
191225
191323
191415
191514
191674
191751
191869
191925
192047
192123
192252
192383
1924132
1925193
1926187
1927338
1928101
1929213
1930318
1931214
1932299
1933324
1934376
1935339
1936543
1937537
1938250
1939448
1940695
1941230
1942429
1943436
1944355
1945398
1946349
1947988
1948403
1949431
19501,341
1951824
1952425
1953441
1954476
1955848
1956678
1957342
1958281
1959764
1960465
1961520
1962684
1963577
1964629
1965470
19661,094
1967657
1968862
1969608
1970414
1971585
1972522
1973490
1974565
1975411
1976894
1977860
1978563
19791,009
1980991
1981856
1982620
19831,465
1984696
1985666
1986819
1987564
1988991
1989603
19901,262
1991804
19921,168
1993759
1994719
19951,113
1996900
19971,214
1998802
1999810
2000989
2001909
20021,208
20031,031
20041,333
20051,112
2006851
20071,955
20081,170
20091,414
20101,028
2011987
20121,086
2013545
2014582
20151,075
2016870
2017324
2018653
2019695
20201,046
20211,020
20221,038
20231,470
2024589
20251,135

Download the Data

  • Data for records on 1863-08-20: 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 (2025-12-31).