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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 April 1877

4 weather records were set or tied worldwide on 17 April 1877. Highest significance: Bologna, IT.

Key Facts for 17 April 1877

  • On 17 April 1877, 4 weather records were set or tied at long-record stations worldwide.
  • 0 were record highs and 3 were record lows, counting maximum and minimum temperature.
  • By timescale, 0 were all-time records, 0 monthly and 4 daily.
  • Bologna set a daily record precipitation of 40.0 mm (1.6 in) on 17 April 1877.
  • Across 165 earlier years (1799 to 2025) the same calendar date averaged 453 records.

Record Map

4 stations
Weather records on 17 April 1877 4 station records on 17 April 1877 are marked on the map, coloured by record type.
4 station records on 17 April 1877 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 17 April 1877: highest significance records shown on the map
StationCountryTypeValueSignificance
BolognaItalyRecord daily precipitation40.0 mm (1.6 in)38 of 100 (Notable)
MilanItalyRecord low maximum temperature7.4 C (45.3 F)24 of 100 (Routine)
MilanItalyRecord low minimum temperature1.3 C (34.3 F)22 of 100 (Routine)
BolognaItalyRecord low minimum temperature0.8 C (33.4 F)14 of 100 (Routine)

Counts by Type and Timescale

4 records
Records on 17 April 1877 by type Records set or tied on 17 April 1877 by type: Lowest daily maximum 1, Lowest daily minimum 2, Heaviest daily rainfall 1. 01122Highest daily maximum: 0Lowest daily maximum: 1Highest daily minimum: 0Lowest daily minimum: 2Heaviest daily rainfall: 1Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 17 April 1877 by type: Lowest daily maximum 1, Lowest daily minimum 2, Heaviest daily rainfall 1.
Records on 17 April 1877 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum1
Highest daily minimum0
Lowest daily minimum2
Heaviest daily rainfall1
Heaviest daily snowfall0
Deepest snow cover0
Records on 17 April 1877 by timescale Records on 17 April 1877 by timescale: all-time 0, monthly 0, daily 4. 01234all-time: 0monthly: 0daily: 4all-timemonthlydaily
Records on 17 April 1877 by timescale: all-time 0, monthly 0, daily 4.
Records on 17 April 1877 by timescale
TimescaleRecords
all-time0
monthly0
daily4

How Much Records Were Beaten By

4 broken records
Histogram of margins by which records were beaten on 17 April 1877 Margins by which the 4 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 25.0. Ties are not counted. 01230 to 5: 35 to 10: 010 to 15: 015 to 20: 020 to 25: 10 to 55 to 1010 to 1515 to 2020 to 25
Margins by which the 4 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 25.0. Ties are not counted.
Histogram of margins by which records were beaten on 17 April 1877
MarginRecords
0 to 53
5 to 100
10 to 150
15 to 200
20 to 251

Top 20 by Significance

17 April 1877
Top 4 records on 17 April 1877 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
17 April 1877Bologna, ITdaily rain40.0 mm (1.6 in)25.0 mm (1.0 in)4 years38 of 100 (Notable)
17 April 1877Milan, ITdaily low max7.4 C (45.3 F)1.1 C (2.0 F)40 years24 of 100 (Routine)
17 April 1877Milan, ITdaily low min1.3 C (34.3 F)1.2 C (2.2 F)30 years22 of 100 (Routine)
17 April 1877Bologna, ITdaily low min0.8 C (33.4 F)1.5 C (2.7 F)15 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

1799 to 1877
Records on 04-17 in each year Records set or tied on this calendar date in each year from 1799 to 1877. 1877 had 4 records. 01,0002,0003,0001799: 11807: 11808: 11815: 11817: 11818: 11819: 11823: 11825: 11830: 11835: 31837: 11845: 11847: 21851: 11852: 31853: 11854: 11855: 11857: 11858: 11862: 11865: 21868: 11873: 41874: 11875: 31877: 41878: 21880: 21889: 11890: 21891: 21892: 41894: 51895: 11896: 51897: 61898: 31899: 11900: 21901: 41902: 41903: 51904: 191905: 111906: 141907: 161908: 381909: 71910: 291911: 331912: 271913: 201914: 831915: 301916: 301917: 321918: 351919: 391920: 871921: 1481922: 961923: 711924: 741925: 1031926: 1401927: 2561928: 3081929: 1451930: 2381931: 2161932: 6151933: 2611934: 2341935: 3741936: 3081937: 4391938: 5641939: 6181940: 3371941: 4601942: 4151943: 2851944: 3341945: 4751946: 4921947: 4611948: 6221949: 4391950: 2931951: 4411952: 5291953: 8181954: 6501955: 3941956: 4861957: 2771958: 7021959: 4341960: 5531961: 6671962: 5971963: 7021964: 7661965: 4111966: 4091967: 9351968: 7451969: 7281970: 5471971: 9241972: 5461973: 5891974: 2441975: 6661976: 1,6301977: 9061978: 6201979: 8101980: 6751981: 6211982: 9651983: 1,3651984: 7201985: 9171986: 9971987: 9601988: 1,0821989: 6381990: 1,0651991: 6141992: 1,1051993: 8471994: 1,0471995: 1,2111996: 1,0441997: 8891998: 1,7951999: 1,7302000: 1,0822001: 1,0132002: 2,2842003: 1,0372004: 7612005: 5722006: 1,4302007: 8632008: 8422009: 7792010: 6062011: 9822012: 9202013: 1,7962014: 9132015: 8132016: 9772017: 4692018: 1,5782019: 4582020: 1,1612021: 7012022: 8262023: 6272024: 6902025: 1,0581799185418941911192819451962197919962013
Records set or tied on this calendar date in each year from 1799 to 1877. 1877 had 4 records.
Counts for years before the ledger starts come from the same station rules.
Records on 04-17 in each year
YearRecords
17991
18071
18081
18151
18171
18181
18191
18231
18251
18301
18353
18371
18451
18472
18511
18523
18531
18541
18551
18571
18581
18621
18652
18681
18734
18741
18753
18774
18782
18802
18891
18902
18912
18924
18945
18951
18965
18976
18983
18991
19002
19014
19024
19035
190419
190511
190614
190716
190838
19097
191029
191133
191227
191320
191483
191530
191630
191732
191835
191939
192087
1921148
192296
192371
192474
1925103
1926140
1927256
1928308
1929145
1930238
1931216
1932615
1933261
1934234
1935374
1936308
1937439
1938564
1939618
1940337
1941460
1942415
1943285
1944334
1945475
1946492
1947461
1948622
1949439
1950293
1951441
1952529
1953818
1954650
1955394
1956486
1957277
1958702
1959434
1960553
1961667
1962597
1963702
1964766
1965411
1966409
1967935
1968745
1969728
1970547
1971924
1972546
1973589
1974244
1975666
19761,630
1977906
1978620
1979810
1980675
1981621
1982965
19831,365
1984720
1985917
1986997
1987960
19881,082
1989638
19901,065
1991614
19921,105
1993847
19941,047
19951,211
19961,044
1997889
19981,795
19991,730
20001,082
20011,013
20022,284
20031,037
2004761
2005572
20061,430
2007863
2008842
2009779
2010606
2011982
2012920
20131,796
2014913
2015813
2016977
2017469
20181,578
2019458
20201,161
2021701
2022826
2023627
2024690
20251,058

Download the Data

  • Data for records on 1877-04-17: 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 2026-10-18 (18 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).