Weather Records on 25 May 1978

581 weather records were set or tied worldwide on 25 May 1978. Highest significance: Powell River, CA.

Key Facts for 25 May 1978

On 25 May 1978, 581 weather records were set or tied at long-record stations worldwide.
260 were record highs and 194 were record lows, counting maximum and minimum temperature.
By timescale, 0 were all-time records, 11 monthly and 570 daily.
Powell River set a daily record precipitation of 46.0 mm (1.8 in) on 25 May 1978.
Across 162 earlier years (1793 to 2026) the same calendar date averaged 442 records.

Record Map

581 stations

581 station records on 25 May 1978 are marked on the map, coloured by record type. Dot size shows the significance score. Made with Natural Earth.

Weather records on 25 May 1978: highest significance records shown on the map
Station	Country	Type	Value	Significance
Powell River	Canada	Record daily precipitation	46.0 mm (1.8 in)	50 of 100 (Notable)
Stevenson Dam	United States	Record daily precipitation	52.6 mm (2.1 in)	50 of 100 (Notable)
Great Falls	Canada	Record daily precipitation	42.7 mm (1.7 in)	48 of 100 (Notable)
Toms River	United States	Record daily precipitation	63.2 mm (2.5 in)	48 of 100 (Notable)
Celina	Russia	Record daily precipitation	36.8 mm (1.4 in)	47 of 100 (Notable)
Gruver	United States	Record daily precipitation	57.4 mm (2.3 in)	47 of 100 (Notable)
Carmel	United States	Record daily precipitation	50.8 mm (2.0 in)	45 of 100 (Notable)
Putnam Lake	United States	Record daily precipitation	60.2 mm (2.4 in)	44 of 100 (Notable)
Zimovniki	Russia	Record daily precipitation	30.0 mm (1.2 in)	43 of 100 (Notable)
Pleasantville	United States	Record daily precipitation	48.3 mm (1.9 in)	42 of 100 (Notable)
Toronto	Canada	Record high maximum temperature	28.9 C (84.0 F)	40 of 100 (Notable)
Rinconada	Mexico	Record low maximum temperature	25.0 C (77.0 F)	40 of 100 (Notable)
Round Pond	United States	Record daily precipitation	67.1 mm (2.6 in)	40 of 100 (Notable)
West Hartford Nepp	United States	Record daily precipitation	53.3 mm (2.1 in)	38 of 100 (Notable)
Perryton	United States	Record daily precipitation	48.8 mm (1.9 in)	38 of 100 (Notable)
Chicoutimi	Canada	Record high maximum temperature	30.0 C (86.0 F)	37 of 100 (Notable)
Port Hastings	Canada	Record high maximum temperature	25.6 C (78.1 F)	37 of 100 (Notable)
Russellville	United States	Record high maximum temperature	35.6 C (96.1 F)	37 of 100 (Notable)
Newburgh L&D	United States	Record daily precipitation	48.3 mm (1.9 in)	37 of 100 (Notable)
Allakaket	United States	Record low minimum temperature	-12.2 C (10.0 F)	37 of 100 (Notable)
Burlington	United States	Record daily precipitation	44.7 mm (1.8 in)	36 of 100 (Notable)
Warren	United States	Record low maximum temperature	7.2 C (45.0 F)	36 of 100 (Notable)
Hatchville	United States	Record daily precipitation	54.4 mm (2.1 in)	36 of 100 (Notable)
Caliente	United States	Record low minimum temperature	-2.8 C (27.0 F)	36 of 100 (Notable)
San Jon	United States	Record daily precipitation	44.7 mm (1.8 in)	36 of 100 (Notable)
Millbrook	United States	Record daily precipitation	40.6 mm (1.6 in)	36 of 100 (Notable)
Bulls Brg Dam	United States	Record daily precipitation	36.8 mm (1.4 in)	35 of 100 (Notable)
Uccle	Belgium	Record low maximum temperature	10.2 C (50.4 F)	34 of 100 (Routine)
Bridgeport	United States	Record low minimum temperature	-10.0 C (14.0 F)	34 of 100 (Routine)
Segreganset	United States	Record daily precipitation	44.2 mm (1.7 in)	34 of 100 (Routine)
Tallyabra	Australia	Record daily precipitation	38.0 mm (1.5 in)	33 of 100 (Routine)
Falls Village	United States	Record daily precipitation	33.3 mm (1.3 in)	33 of 100 (Routine)
Owensboro Trtmt Plt E	United States	Record daily precipitation	40.6 mm (1.6 in)	33 of 100 (Routine)
Long Prairie	United States	Record high maximum temperature	31.7 C (89.1 F)	33 of 100 (Routine)
Clover Valley	United States	Record low minimum temperature	-3.9 C (25.0 F)	33 of 100 (Routine)
Lemon Cove	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Tejon Rancho	United States	Record low minimum temperature	4.4 C (39.9 F)	32 of 100 (Routine)
Oujda	Morocco	Record low maximum temperature	17.0 C (62.6 F)	31 of 100 (Routine)
Henichesk	Ukraine	Record low maximum temperature	14.5 C (58.1 F)	31 of 100 (Routine)
Farmington 3NW	United States	Record high maximum temperature	33.3 C (91.9 F)	31 of 100 (Routine)
New London	United States	Record high maximum temperature	34.4 C (93.9 F)	31 of 100 (Routine)
Cockaponset Rs	United States	Record daily precipitation	53.1 mm (2.1 in)	30 of 100 (Routine)
Norfolk 2 SW	United States	Record daily precipitation	31.8 mm (1.3 in)	30 of 100 (Routine)
Wigwam Rsvr	United States	Record daily precipitation	37.8 mm (1.5 in)	30 of 100 (Routine)
Spencer 1 N	United States	Record high minimum temperature	21.1 C (70.0 F)	30 of 100 (Routine)
Zumbrota	United States	Record high maximum temperature	32.2 C (90.0 F)	30 of 100 (Routine)
Greenwood Lake	United States	Record daily precipitation	32.3 mm (1.3 in)	30 of 100 (Routine)
Brule Rs	United States	Record daily precipitation	34.0 mm (1.3 in)	30 of 100 (Routine)
Upton	United States	Record high minimum temperature	16.1 C (61.0 F)	30 of 100 (Routine)
Middletown 4 W	United States	Record daily precipitation	62.7 mm (2.5 in)	29 of 100 (Routine)
Mason City	United States	Record high maximum temperature	33.9 C (93.0 F)	29 of 100 (Routine)
Luverne	United States	Record high minimum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Mora	United States	Record high minimum temperature	17.2 C (63.0 F)	29 of 100 (Routine)
Pokegama Dam	United States	Record high maximum temperature	31.1 C (88.0 F)	29 of 100 (Routine)
Thomas	United States	Record daily precipitation	38.1 mm (1.5 in)	29 of 100 (Routine)
Kailua 446	United States	Record high minimum temperature	20.6 C (69.1 F)	29 of 100 (Routine)
Catemaco	Mexico	Record low minimum temperature	13.9 C (57.0 F)	28 of 100 (Routine)
Porterville	United States	Record low minimum temperature	6.1 C (43.0 F)	28 of 100 (Routine)
Grand View 4 NW	United States	Record low maximum temperature	16.1 C (61.0 F)	28 of 100 (Routine)
New Hampton	United States	Record high minimum temperature	18.9 C (66.0 F)	28 of 100 (Routine)

Counts by Type and Timescale

581 records

Records set or tied on 25 May 1978 by type: Highest daily maximum 143, Lowest daily maximum 97, Highest daily minimum 117, Lowest daily minimum 97, Heaviest daily rainfall 121, Heaviest daily snowfall 6.

Records on 25 May 1978 by type
Record type	Records
Highest daily maximum	143
Lowest daily maximum	97
Highest daily minimum	117
Lowest daily minimum	97
Heaviest daily rainfall	121
Heaviest daily snowfall	6
Deepest snow cover	0

Records on 25 May 1978 by timescale: all-time 0, monthly 11, daily 570.

How Much Records Were Beaten By

423 broken records

Margins by which the 423 broken records beat the old ones, in degrees Celsius for temperature and millimetres for precipitation and snow; the largest margin was 47.7. Ties are not counted.

Top 20 by Significance

25 May 1978

Top 20 records on 25 May 1978 by significance
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
25 May 1978	Powell River, CA	daily rain	46.0 mm (1.8 in)	29.7 mm (1.2 in)	19 years	50 of 100 (Notable)
25 May 1978	Stevenson Dam, US	daily rain	52.6 mm (2.1 in)	39.9 mm (1.6 in)	27 years	50 of 100 (Notable)
25 May 1978	Great Falls, CA	daily rain	42.7 mm (1.7 in)	33.8 mm (1.3 in)	12 years	48 of 100 (Notable)
25 May 1978	Toms River, US	daily rain	63.2 mm (2.5 in)	22.6 mm (0.9 in)	77 years	48 of 100 (Notable)
25 May 1978	Celina, RU	daily rain	36.8 mm (1.4 in)	24.5 mm (1.0 in)	28 years	47 of 100 (Notable)
25 May 1978	Gruver, US	daily rain	57.4 mm (2.3 in)	47.7 mm (1.9 in)	24 years	47 of 100 (Notable)
25 May 1978	Carmel, US	daily rain	50.8 mm (2.0 in)	15.7 mm (0.6 in)	76 years	45 of 100 (Notable)
25 May 1978	Putnam Lake, US	daily rain	60.2 mm (2.4 in)	46.5 mm (1.8 in)	4 years	44 of 100 (Notable)
25 May 1978	Zimovniki, RU	daily rain	30.0 mm (1.2 in)	19.1 mm (0.8 in)	28 years	43 of 100 (Notable)
25 May 1978	Pleasantville, US	daily rain	48.3 mm (1.9 in)	31.0 mm (1.2 in)	33 years	42 of 100 (Notable)
25 May 1978	Toronto, CA	daily high max	28.9 C (84.0 F)	0.6 C (1.1 F)	97 years	40 of 100 (Notable)
25 May 1978	Rinconada, MX	daily low max	25.0 C (77.0 F)	5.6 C (10.1 F)	56 years	40 of 100 (Notable)
25 May 1978	Round Pond, US	daily rain	67.1 mm (2.6 in)	34.3 mm (1.4 in)	20 years	40 of 100 (Notable)
25 May 1978	West Hartford Nepp, US	daily rain	53.3 mm (2.1 in)	30.9 mm (1.2 in)	11 years	38 of 100 (Notable)
25 May 1978	Perryton, US	daily rain	48.8 mm (1.9 in)	24.7 mm (1.0 in)	39 years	38 of 100 (Notable)
25 May 1978	Chicoutimi, CA	daily high max	30.0 C (86.0 F)	0.6 C (1.1 F)	92 years	37 of 100 (Notable)
25 May 1978	Port Hastings, CA	daily high max	25.6 C (78.1 F)	1.2 C (2.2 F)	84 years	37 of 100 (Notable)
25 May 1978	Russellville, US	daily high max	35.6 C (96.1 F)	1.7 C (3.1 F)	81 years	37 of 100 (Notable)
25 May 1978	Newburgh L&D, US	daily rain	48.3 mm (1.9 in)	30.5 mm (1.2 in)	32 years	37 of 100 (Notable)
25 May 1978	Allakaket, US	daily low min	-12.2 C (10.0 F)	9.4 C (16.9 F)	43 years	37 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 1978

Records set or tied on this calendar date in each year from 1793 to 1978. 1978 had 581 records.

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

Records on 05-25 in each year
Year	Records
1793	1
1795	1
1797	1
1824	1
1830	1
1837	2
1839	1
1841	1
1846	2
1847	3
1848	1
1852	1
1864	1
1865	1
1866	2
1867	2
1868	3
1869	1
1870	1
1875	1
1879	2
1880	3
1881	1
1883	1
1886	1
1887	2
1889	3
1890	12
1891	1
1892	1
1893	1
1894	1
1895	3
1897	1
1898	5
1899	2
1900	5
1901	10
1902	2
1903	7
1904	14
1905	9
1906	41
1907	18
1908	25
1909	20
1910	35
1911	15
1912	21
1913	46
1914	33
1915	20
1916	33
1917	53
1918	22
1919	36
1920	59
1921	208
1922	118
1923	113
1924	277
1925	675
1926	221
1927	240
1928	301
1929	122
1930	156
1931	262
1932	358
1933	400
1934	219
1935	301
1936	407
1937	176
1938	456
1939	322
1940	259
1941	297
1942	534
1943	567
1944	392
1945	225
1946	371
1947	588
1948	317
1949	371
1950	644
1951	542
1952	436
1953	1,024
1954	284
1955	1,068
1956	940
1957	463
1958	439
1959	316
1960	493
1961	254
1962	567
1963	352
1964	716
1965	662
1966	295
1967	946
1968	394
1969	367
1970	385
1971	700
1972	477
1973	595
1974	820
1975	922
1976	412
1977	946
1978	581
1979	1,432
1980	1,160
1981	1,072
1982	714
1983	1,147
1984	677
1985	519
1986	500
1987	703
1988	635
1989	1,190
1990	656
1991	1,768
1992	1,682
1993	824
1994	773
1995	1,546
1996	1,304
1997	1,513
1998	882
1999	708
2000	1,417
2001	1,201
2002	1,001
2003	918
2004	903
2005	909
2006	801
2007	1,420
2008	840
2009	1,088
2010	1,512
2011	1,180
2012	1,616
2013	912
2014	761
2015	407
2016	429
2017	829
2018	800
2019	641
2020	564
2021	505
2022	752
2023	305
2024	688
2025	527
2026	913

Download the Data

Data for records on 1978-05-25: 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).

Histogram of margins by which records were beaten on 25 May 1978
Margin	Records
0 to 10	365
10 to 20	27
20 to 30	19
30 to 40	9
40 to 50	3