Weather Records on 17 December 2018

498 weather records were set or tied worldwide on 17 December 2018. Highest significance: Ulmarra (Newsagency), AU.

Key Facts for 17 December 2018

On 17 December 2018, 498 weather records were set or tied at long-record stations worldwide.
258 were record highs and 18 were record lows, counting maximum and minimum temperature.
By timescale, 6 were all-time records, 13 monthly and 479 daily.
Ulmarra (Newsagency) set a monthly record daily precipitation of 152.4 mm (6.0 in) on 17 December 2018.
Across 160 earlier years (1793 to 2025) the same calendar date averaged 463 records.

Record Map

498 stations

498 station records on 17 December 2018 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 17 December 2018: highest significance records shown on the map
Station	Country	Type	Value	Significance
Ulmarra (Newsagency)	Australia	Record daily precipitation	152.4 mm (6.0 in)	79 of 100 (Major)
Brushgrove Post Office	Australia	Record daily precipitation	107.0 mm (4.2 in)	77 of 100 (Major)
Lower Bucca	Australia	Record daily precipitation	162.8 mm (6.4 in)	77 of 100 (Major)
Balline	Australia	Record daily precipitation	49.6 mm (2.0 in)	75 of 100 (Major)
Zakatala	Azerbaijan	Record daily precipitation	99.1 mm (3.9 in)	70 of 100 (Major)
Bowraville Recreation Club	Australia	Record daily precipitation	96.0 mm (3.8 in)	68 of 100 (Major)
Moogerah Dam	Australia	Record daily precipitation	91.0 mm (3.6 in)	66 of 100 (Major)
Kangaroo Creek (Hayfield)	Australia	Record daily precipitation	192.0 mm (7.6 in)	65 of 100 (Major)
Promised Land (Bellingen (Crys	Australia	Record daily precipitation	310.0 mm (12.2 in)	63 of 100 (Major)
Leigh (Rolling Acres)	Australia	Record daily precipitation	242.0 mm (9.5 in)	63 of 100 (Major)
Gabyon	Australia	Record daily precipitation	35.0 mm (1.4 in)	62 of 100 (Major)
Hereward	Australia	Record daily precipitation	88.2 mm (3.5 in)	60 of 100 (Major)
Lowood Don St	Australia	Record daily precipitation	58.0 mm (2.3 in)	57 of 100 (Notable)
Wunburra	Australia	Record daily precipitation	148.0 mm (5.8 in)	56 of 100 (Notable)
Wondalli	Australia	Record daily precipitation	62.0 mm (2.4 in)	56 of 100 (Notable)
Nana Glen (Cowling Close)	Australia	Record daily precipitation	268.0 mm (10.6 in)	56 of 100 (Notable)
Maroon	Australia	Record daily precipitation	47.0 mm (1.9 in)	55 of 100 (Notable)
Nymboida (Armidale Road)	Australia	Record daily precipitation	280.0 mm (11.0 in)	55 of 100 (Notable)
Macalister	Australia	Record daily precipitation	67.8 mm (2.7 in)	53 of 100 (Notable)
Cangai (Smelter Creek)	Australia	Record daily precipitation	105.4 mm (4.1 in)	53 of 100 (Notable)
Grafton South (South Grafton	Australia	Record daily precipitation	281.0 mm (11.1 in)	53 of 100 (Notable)
Coramba (Glenfiddich)	Australia	Record daily precipitation	212.8 mm (8.4 in)	53 of 100 (Notable)
Dunmore State Forest	Australia	Record daily precipitation	92.0 mm (3.6 in)	52 of 100 (Notable)
Walcha (Craigdarroch)	Australia	Record daily precipitation	59.0 mm (2.3 in)	52 of 100 (Notable)
Carneys Creek the Ranch	Australia	Record daily precipitation	103.0 mm (4.1 in)	51 of 100 (Notable)
Cecil Plains Homestead	Australia	Record daily precipitation	150.8 mm (5.9 in)	51 of 100 (Notable)
Wooli Beach	Australia	Record daily precipitation	131.2 mm (5.2 in)	51 of 100 (Notable)
Falcon Dam	United States	Record low minimum temperature	-17.8 C (0.0 F)	51 of 100 (Notable)
Wilsons Peak	Australia	Record daily precipitation	72.8 mm (2.9 in)	50 of 100 (Notable)
South West Rocks (Smoky Cape L	Australia	Record daily precipitation	77.0 mm (3.0 in)	50 of 100 (Notable)
Brookstead Post Office	Australia	Record daily precipitation	85.4 mm (3.4 in)	49 of 100 (Notable)
Proston Post Office	Australia	Record daily precipitation	95.0 mm (3.7 in)	48 of 100 (Notable)
Pampas	Australia	Record daily precipitation	105.0 mm (4.1 in)	48 of 100 (Notable)
Fall Rvr Mills	United States	Record daily precipitation	37.6 mm (1.5 in)	48 of 100 (Notable)
Chico UNIV Farm	United States	Record daily precipitation	54.6 mm (2.1 in)	47 of 100 (Notable)
Rosewood Walloon Rd	Australia	Record daily precipitation	88.0 mm (3.5 in)	46 of 100 (Notable)
Nicolaus #2	United States	Record daily precipitation	50.3 mm (2.0 in)	46 of 100 (Notable)
Number One (Murrays Creek)	Australia	Record daily precipitation	60.2 mm (2.4 in)	45 of 100 (Notable)
Marquette	United States	Record high maximum temperature	10.0 C (50.0 F)	45 of 100 (Notable)
Palmwoods	Australia	Record daily precipitation	113.0 mm (4.4 in)	44 of 100 (Notable)
Traighli	Australia	Record daily precipitation	102.8 mm (4.0 in)	44 of 100 (Notable)
Tubuai	French Polynesia	Record daily precipitation	200.2 mm (7.9 in)	44 of 100 (Notable)
Kalangadoo	Australia	Record daily precipitation	27.8 mm (1.1 in)	43 of 100 (Notable)
Lethebrook	Australia	Record daily precipitation	130.0 mm (5.1 in)	43 of 100 (Notable)
Tingha	Australia	Record daily precipitation	81.0 mm (3.2 in)	43 of 100 (Notable)
Tyringham (Glenferneigh (Ring	Australia	Record daily precipitation	73.0 mm (2.9 in)	43 of 100 (Notable)
Toora	Australia	Record daily precipitation	32.2 mm (1.3 in)	43 of 100 (Notable)
Machilipatnam	India	Record daily precipitation	54.1 mm (2.1 in)	43 of 100 (Notable)
Newman	United States	Record daily precipitation	39.6 mm (1.6 in)	43 of 100 (Notable)
Toorooka (Moparrabah)	Australia	Record daily precipitation	65.0 mm (2.6 in)	42 of 100 (Notable)
Ft Ross	United States	Record daily precipitation	39.6 mm (1.6 in)	42 of 100 (Notable)
Upper Mudgeeraba Water	Australia	Record daily precipitation	134.0 mm (5.3 in)	41 of 100 (Notable)
Horsham	Australia	Record daily precipitation	35.0 mm (1.4 in)	41 of 100 (Notable)
Salekhard	Russia	Record high minimum temperature	-5.0 C (23.0 F)	41 of 100 (Notable)
Turlock #2	United States	Record high minimum temperature	10.6 C (51.1 F)	41 of 100 (Notable)
Lima	United States	Record high maximum temperature	8.3 C (46.9 F)	41 of 100 (Notable)
Rhinelander	United States	Record high maximum temperature	6.7 C (44.1 F)	41 of 100 (Notable)
Warroo Station	Australia	Record daily precipitation	59.8 mm (2.4 in)	40 of 100 (Notable)
Taylors Arm (Lemon Grove)	Australia	Record daily precipitation	70.0 mm (2.8 in)	40 of 100 (Notable)
Springbrook Road	Australia	Record daily precipitation	127.0 mm (5.0 in)	39 of 100 (Notable)

Counts by Type and Timescale

498 records

Records set or tied on 17 December 2018 by type: Highest daily maximum 89, Lowest daily maximum 11, Highest daily minimum 169, Lowest daily minimum 7, Heaviest daily rainfall 216, Heaviest daily snowfall 3, Deepest snow cover 3.

Records on 17 December 2018 by type
Record type	Records
Highest daily maximum	89
Lowest daily maximum	11
Highest daily minimum	169
Lowest daily minimum	7
Heaviest daily rainfall	216
Heaviest daily snowfall	3
Deepest snow cover	3

Records on 17 December 2018 by timescale: all-time 6, monthly 13, daily 479.

How Much Records Were Beaten By

424 broken records

Margins by which the 424 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 203.0. Ties are not counted.

Top 20 by Significance

17 December 2018

Top 20 records on 17 December 2018 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 December 2018	Ulmarra (Newsagency), AU	monthly rain	152.4 mm (6.0 in)	45.0 mm (1.8 in)	102 years	79 of 100 (Major)
17 December 2018	Brushgrove Post Office, AU	daily rain	107.0 mm (4.2 in)	77.0 mm (3.0 in)	92 years	77 of 100 (Major)
17 December 2018	Lower Bucca, AU	daily rain	162.8 mm (6.4 in)	113.5 mm (4.5 in)	92 years	77 of 100 (Major)
17 December 2018	Balline, AU	monthly rain	49.6 mm (2.0 in)	23.9 mm (0.9 in)	58 years	75 of 100 (Major)
17 December 2018	Zakatala, AZ	daily rain	99.1 mm (3.9 in)	80.0 mm (3.1 in)	75 years	70 of 100 (Major)
17 December 2018	Bowraville Recreation Club, AU	daily rain	96.0 mm (3.8 in)	46.7 mm (1.8 in)	112 years	68 of 100 (Major)
17 December 2018	Moogerah Dam, AU	daily rain	91.0 mm (3.6 in)	51.4 mm (2.0 in)	68 years	66 of 100 (Major)
17 December 2018	Kangaroo Creek (Hayfield), AU	monthly rain	192.0 mm (7.6 in)	55.0 mm (2.2 in)	33 years	65 of 100 (Major)
17 December 2018	Promised Land (Bellingen (Crys, AU	monthly rain	310.0 mm (12.2 in)	105.0 mm (4.1 in)	29 years	63 of 100 (Major)
17 December 2018	Leigh (Rolling Acres), AU	monthly rain	242.0 mm (9.5 in)	109.6 mm (4.3 in)	30 years	63 of 100 (Major)
17 December 2018	Gabyon, AU	daily rain	35.0 mm (1.4 in)	24.3 mm (1.0 in)	85 years	62 of 100 (Major)
17 December 2018	Hereward, AU	daily rain	88.2 mm (3.5 in)	57.2 mm (2.3 in)	48 years	60 of 100 (Major)
17 December 2018	Lowood Don St, AU	daily rain	58.0 mm (2.3 in)	22.7 mm (0.9 in)	123 years	57 of 100 (Notable)
17 December 2018	Wunburra, AU	daily rain	148.0 mm (5.8 in)	101.0 mm (4.0 in)	35 years	56 of 100 (Notable)
17 December 2018	Wondalli, AU	daily rain	62.0 mm (2.4 in)	25.2 mm (1.0 in)	96 years	56 of 100 (Notable)
17 December 2018	Nana Glen (Cowling Close), AU	monthly rain	268.0 mm (10.6 in)	121.0 mm (4.8 in)	13 years	56 of 100 (Notable)
17 December 2018	Maroon, AU	daily rain	47.0 mm (1.9 in)	22.9 mm (0.9 in)	103 years	55 of 100 (Notable)
17 December 2018	Nymboida (Armidale Road), AU	all-time rain	280.0 mm (11.0 in)	6.9 mm (0.27 in)	72 years	55 of 100 (Notable)
17 December 2018	Macalister, AU	daily rain	67.8 mm (2.7 in)	58.8 mm (2.3 in)	32 years	53 of 100 (Notable)
17 December 2018	Cangai (Smelter Creek), AU	daily rain	105.4 mm (4.1 in)	60.6 mm (2.4 in)	12 years	53 of 100 (Notable)

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 2018

Records set or tied on this calendar date in each year from 1793 to 2018. 2018 had 498 records.

Counts for years before the ledger starts come from the same station rules.

Records on 12-17 in each year
Year	Records
1793	2
1796	1
1806	2
1808	2
1814	1
1815	1
1839	1
1845	1
1846	4
1847	1
1848	1
1859	3
1866	1
1867	1
1868	1
1869	2
1873	2
1876	3
1877	2
1878	1
1879	2
1881	2
1885	1
1886	1
1888	2
1889	2
1890	4
1892	4
1893	2
1894	4
1895	3
1896	4
1897	4
1898	2
1899	1
1900	6
1901	5
1902	47
1903	2
1904	14
1905	2
1906	17
1907	9
1908	13
1909	5
1910	37
1911	12
1912	15
1913	21
1914	17
1915	31
1916	21
1917	21
1918	21
1919	109
1920	97
1921	94
1922	120
1923	170
1924	505
1925	79
1926	172
1927	143
1928	359
1929	221
1930	362
1931	217
1932	684
1933	710
1934	200
1935	87
1936	504
1937	379
1938	118
1939	1,126
1940	248
1941	261
1942	507
1943	444
1944	189
1945	621
1946	207
1947	258
1948	316
1949	296
1950	294
1951	773
1952	277
1953	283
1954	409
1955	419
1956	448
1957	686
1958	540
1959	548
1960	492
1961	911
1962	676
1963	531
1964	1,239
1965	482
1966	516
1967	1,121
1968	338
1969	238
1970	820
1971	781
1972	601
1973	1,016
1974	390
1975	474
1976	507
1977	1,024
1978	710
1979	951
1980	1,116
1981	1,354
1982	569
1983	1,264
1984	1,618
1985	1,210
1986	743
1987	1,191
1988	481
1989	2,905
1990	866
1991	577
1992	1,461
1993	761
1994	685
1995	956
1996	1,212
1997	1,279
1998	695
1999	901
2000	1,566
2001	1,262
2002	858
2003	751
2004	554
2005	806
2006	1,307
2007	1,100
2008	1,354
2009	926
2010	1,405
2011	430
2012	942
2013	718
2014	370
2015	1,378
2016	1,521
2017	408
2018	498
2019	917
2020	768
2021	908
2022	595
2023	931
2024	560
2025	1,198

Download the Data

Data for records on 2018-12-17: 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 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Margin	Records
0 to 50	397
50 to 100	20
100 to 150	6
150 to 200	0
200 to 250	1