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Built 2026-10-19 (19 October 2026)

Weather Records on 9 September 1866

3 weather records were set or tied worldwide on 9 September 1866. Highest significance: Jena Sternwarte, DE.

Key Facts for 9 September 1866

  • On 9 September 1866, 3 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, 1 monthly and 2 daily.
  • Jena Sternwarte set a monthly record high minimum temperature of 16.5 C (61.7 F) on 9 September 1866.
  • Across 161 earlier years (1806 to 2025) the same calendar date averaged 462 records.

Record Map

3 stations
Weather records on 9 September 1866 3 station records on 9 September 1866 are marked on the map, coloured by record type.
3 station records on 9 September 1866 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.
Weather records on 9 September 1866: highest significance records shown on the map
StationCountryTypeValueSignificance
Jena SternwarteGermanyRecord high minimum temperature16.5 C (61.7 F)26 of 100 (Routine)
Jena SternwarteGermanyRecord daily precipitation5.9 mm (0.23 in)15 of 100 (Routine)
Uppsala_AutSwedenRecord daily precipitation6.7 mm (0.26 in)9 of 100 (Routine)

Counts by Type and Timescale

3 records
Records on 9 September 1866 by type Records set or tied on 9 September 1866 by type: Highest daily minimum 1, Heaviest daily rainfall 2. 01122Highest daily maximum: 0Lowest daily maximum: 0Highest daily minimum: 1Lowest daily minimum: 0Heaviest daily rainfall: 2Heaviest daily snowfall: 0Deepest snow cover: 0Max highMax lowMin highMin lowRainSnowDepth
Records set or tied on 9 September 1866 by type: Highest daily minimum 1, Heaviest daily rainfall 2.
Records on 9 September 1866 by type
Record typeRecords
Highest daily maximum0
Lowest daily maximum0
Highest daily minimum1
Lowest daily minimum0
Heaviest daily rainfall2
Heaviest daily snowfall0
Deepest snow cover0
Records on 9 September 1866 by timescale Records on 9 September 1866 by timescale: all-time 0, monthly 1, daily 2. 01122all-time: 0monthly: 1daily: 2all-timemonthlydaily
Records on 9 September 1866 by timescale: all-time 0, monthly 1, daily 2.
Records on 9 September 1866 by timescale
TimescaleRecords
all-time0
monthly1
daily2

How Much Records Were Beaten By

3 broken records
Histogram of margins by which records were beaten on 9 September 1866 Margins by which the 3 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 0.8. Ties are not counted. 011220.0 to 0.2: 00.2 to 0.4: 10.4 to 0.6: 00.6 to 0.8: 20.0 to 0.20.2 to 0.40.4 to 0.60.6 to 0.8
Margins by which the 3 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 0.8. Ties are not counted.
Histogram of margins by which records were beaten on 9 September 1866
MarginRecords
0.0 to 0.20
0.2 to 0.41
0.4 to 0.60
0.6 to 0.82

Top 20 by Significance

9 September 1866
Top 3 records on 9 September 1866 by significance
DateStationRecordValueBeat old record byOld record stoodSignificance
9 September 1866Jena Sternwarte, DEmonthly high min16.5 C (61.7 F)0.2 C (0.4 F)40 years26 of 100 (Routine)
9 September 1866Jena Sternwarte, DEdaily rain5.9 mm (0.23 in)0.7 mm (0.03 in)35 years15 of 100 (Routine)
9 September 1866Uppsala_Aut, SEdaily rain6.7 mm (0.26 in)0.8 mm (0.03 in)17 years9 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

1806 to 1866
Records on 09-09 in each year Records set or tied on this calendar date in each year from 1806 to 1866. 1866 had 3 records. 01,0002,0003,0001806: 11812: 11813: 11814: 21834: 11836: 11845: 11847: 11848: 11849: 21850: 11854: 11864: 21865: 31866: 31867: 11869: 11871: 11873: 11878: 11879: 11880: 21883: 31884: 41886: 11888: 41889: 11890: 11891: 11892: 41893: 41894: 31895: 71897: 31898: 51899: 61900: 11901: 41902: 51903: 141904: 91905: 81906: 241907: 91908: 51909: 91910: 171911: 271912: 481913: 121914: 691915: 481916: 161917: 441918: 401919: 741920: 1451921: 921922: 1151923: 581924: 2321925: 2481926: 1681927: 2461928: 1081929: 3621930: 2111931: 5581932: 3021933: 4331934: 2561935: 4611936: 2971937: 2421938: 4161939: 4291940: 2941941: 7631942: 3571943: 5961944: 7191945: 3551946: 3661947: 4651948: 3071949: 1,4071950: 4261951: 3381952: 5111953: 3441954: 2831955: 6081956: 7421957: 3901958: 4191959: 7361960: 4921961: 3831962: 8471963: 4001964: 4881965: 3261966: 3661967: 3671968: 4401969: 6031970: 5841971: 4981972: 4641973: 5171974: 6891975: 5551976: 7731977: 4101978: 7021979: 8781980: 8291981: 1,0111982: 8141983: 9581984: 1,3041985: 1,2691986: 1,0261987: 6761988: 8361989: 9831990: 7621991: 8821992: 6201993: 8861994: 8921995: 9371996: 8091997: 8371998: 1,6671999: 1,0132000: 8112001: 1,6472002: 1,3552003: 7862004: 1,6032005: 1,0682006: 9172007: 9482008: 1,1612009: 7922010: 1,0492011: 1,3282012: 6812013: 9742014: 5902015: 8062016: 1,2102017: 6622018: 8712019: 9422020: 2,5662021: 1,4522022: 1,0892023: 1,2212024: 1,1462025: 5171806187118981915193219491966198320002017
Records set or tied on this calendar date in each year from 1806 to 1866. 1866 had 3 records.
Counts for years before the ledger starts come from the same station rules.
Records on 09-09 in each year
YearRecords
18061
18121
18131
18142
18341
18361
18451
18471
18481
18492
18501
18541
18642
18653
18663
18671
18691
18711
18731
18781
18791
18802
18833
18844
18861
18884
18891
18901
18911
18924
18934
18943
18957
18973
18985
18996
19001
19014
19025
190314
19049
19058
190624
19079
19085
19099
191017
191127
191248
191312
191469
191548
191616
191744
191840
191974
1920145
192192
1922115
192358
1924232
1925248
1926168
1927246
1928108
1929362
1930211
1931558
1932302
1933433
1934256
1935461
1936297
1937242
1938416
1939429
1940294
1941763
1942357
1943596
1944719
1945355
1946366
1947465
1948307
19491,407
1950426
1951338
1952511
1953344
1954283
1955608
1956742
1957390
1958419
1959736
1960492
1961383
1962847
1963400
1964488
1965326
1966366
1967367
1968440
1969603
1970584
1971498
1972464
1973517
1974689
1975555
1976773
1977410
1978702
1979878
1980829
19811,011
1982814
1983958
19841,304
19851,269
19861,026
1987676
1988836
1989983
1990762
1991882
1992620
1993886
1994892
1995937
1996809
1997837
19981,667
19991,013
2000811
20011,647
20021,355
2003786
20041,603
20051,068
2006917
2007948
20081,161
2009792
20101,049
20111,328
2012681
2013974
2014590
2015806
20161,210
2017662
2018871
2019942
20202,566
20211,452
20221,089
20231,221
20241,146
2025517

Download the Data

  • Data for records on 1866-09-09: 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).