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

Weather Records on 17 July 1866

1 weather records were set or tied worldwide on 17 July 1866. Highest significance: Milan, IT.

Key Facts for 17 July 1866

  • On 17 July 1866, 1 weather records were set or tied at long-record stations worldwide.
  • 1 were record highs and 0 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 1 daily.
  • Milan set a daily record high maximum temperature of 35.3 C (95.5 F) on 17 July 1866.
  • Across 162 earlier years (1793 to 2025) the same calendar date averaged 445 records.

Record Map

1 stations
Weather records on 17 July 1866 1 station records on 17 July 1866 are marked on the map, coloured by record type.
1 station records on 17 July 1866 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 17 July 1866: highest significance records shown on the map
StationCountryTypeValueSignificance
MilanItalyRecord high maximum temperature35.3 C (95.5 F)15 of 100 (Routine)

Counts by Type and Timescale

1 records
Records on 17 July 1866 by type Records set or tied on 17 July 1866 by type: Highest daily maximum 1. 00111Highest daily maximum: 1Lowest daily maximum: 0Highest daily minimum: 0Lowest daily minimum: 0Heaviest daily rainfall: 0Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 17 July 1866 by type: Highest daily maximum 1.
Records on 17 July 1866 by type
Record typeRecords
Highest daily maximum1
Lowest daily maximum0
Highest daily minimum0
Lowest daily minimum0
Heaviest daily rainfall0
Heaviest daily snowfall0
Deepest snow cover0
Records on 17 July 1866 by timescale Records on 17 July 1866 by timescale: all-time 0, monthly 0, daily 1. 00111all-time: 0monthly: 0daily: 1all-timemonthlydaily
Records on 17 July 1866 by timescale: all-time 0, monthly 0, daily 1.
Records on 17 July 1866 by timescale
TimescaleRecords
all-time0
monthly0
daily1

How Much Records Were Beaten By

1 broken records
Histogram of margins by which records were beaten on 17 July 1866 Margins by which the 1 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 0.3. Ties are not counted. 001110.0 to 0.2: 00.2 to 0.4: 10.0 to 0.20.2 to 0.4
Margins by which the 1 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 0.3. Ties are not counted.
Histogram of margins by which records were beaten on 17 July 1866
MarginRecords
0.0 to 0.20
0.2 to 0.41

Top 20 by Significance

17 July 1866
Top 1 records on 17 July 1866 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
17 July 1866Milan, ITdaily high max35.3 C (95.5 F)0.3 C (0.5 F)13 years15 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 1866
Records on 07-17 in each year Records set or tied on this calendar date in each year from 1793 to 1866. 1866 had 1 records. 05001,0001,5002,0001793: 11798: 11799: 11801: 21802: 11821: 11827: 11833: 11840: 11842: 11845: 21852: 11862: 11863: 11865: 21866: 11871: 11874: 11875: 21877: 11880: 11881: 21882: 21883: 51884: 11887: 11888: 21889: 41890: 41892: 51893: 31894: 41895: 11896: 31897: 11898: 21899: 41900: 41901: 61902: 61903: 131904: 41905: 91906: 131907: 121908: 321909: 161910: 81911: 521912: 131913: 261914: 671915: 711916: 271917: 621918: 411919: 451920: 501921: 1201922: 2061923: 1051924: 1651925: 2751926: 2511927: 1181928: 1161929: 1541930: 3661931: 4921932: 2931933: 2161934: 4381935: 2451936: 8151937: 3131938: 3031939: 5401940: 3191941: 3861942: 5221943: 3211944: 2361945: 6811946: 5231947: 5051948: 2781949: 4051950: 6451951: 3561952: 7721953: 5571954: 5171955: 5121956: 6081957: 2981958: 6931959: 6311960: 3241961: 4081962: 4211963: 2231964: 4811965: 7531966: 4541967: 9651968: 7071969: 7411970: 4861971: 7901972: 6341973: 6801974: 6911975: 7751976: 1,0411977: 7641978: 7941979: 6421980: 1,1371981: 6281982: 8501983: 1,1201984: 8751985: 4831986: 1,2141987: 1,3881988: 1,2391989: 1,2891990: 9531991: 7631992: 1,0551993: 9561994: 6311995: 9171996: 9111997: 8161998: 1,0311999: 9252000: 1,1662001: 9162002: 9952003: 1,3962004: 9082005: 1,1842006: 1,5092007: 1,2182008: 5082009: 1,2182010: 9652011: 1,1012012: 9342013: 8182014: 1,4562015: 8312016: 6792017: 3982018: 7482019: 4692020: 5102021: 6252022: 7882023: 1,0592024: 8132025: 9661793187418971914193119481965198219992016
Records set or tied on this calendar date in each year from 1793 to 1866. 1866 had 1 records.
Counts for years before the ledger starts come from the same station rules.
Records on 07-17 in each year
YearRecords
17931
17981
17991
18012
18021
18211
18271
18331
18401
18421
18452
18521
18621
18631
18652
18661
18711
18741
18752
18771
18801
18812
18822
18835
18841
18871
18882
18894
18904
18925
18933
18944
18951
18963
18971
18982
18994
19004
19016
19026
190313
19044
19059
190613
190712
190832
190916
19108
191152
191213
191326
191467
191571
191627
191762
191841
191945
192050
1921120
1922206
1923105
1924165
1925275
1926251
1927118
1928116
1929154
1930366
1931492
1932293
1933216
1934438
1935245
1936815
1937313
1938303
1939540
1940319
1941386
1942522
1943321
1944236
1945681
1946523
1947505
1948278
1949405
1950645
1951356
1952772
1953557
1954517
1955512
1956608
1957298
1958693
1959631
1960324
1961408
1962421
1963223
1964481
1965753
1966454
1967965
1968707
1969741
1970486
1971790
1972634
1973680
1974691
1975775
19761,041
1977764
1978794
1979642
19801,137
1981628
1982850
19831,120
1984875
1985483
19861,214
19871,388
19881,239
19891,289
1990953
1991763
19921,055
1993956
1994631
1995917
1996911
1997816
19981,031
1999925
20001,166
2001916
2002995
20031,396
2004908
20051,184
20061,509
20071,218
2008508
20091,218
2010965
20111,101
2012934
2013818
20141,456
2015831
2016679
2017398
2018748
2019469
2020510
2021625
2022788
20231,059
2024813
2025966

Download the Data

  • Data for records on 1866-07-17: 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 (2025-12-31).