South Wales Emery Park Weather Records (USC00308058)

Record envelope, standing records and threshold days for South Wales Emery Park (USC00308058), New York, United States, with 52 years of record.

Key Facts for South Wales Emery Park

South Wales Emery Park (USC00308058) is a weather station in New York, United States at 42.72 latitude and -78.60 longitude, 332 m (1,089 ft) above sea level.
The station reports from 1931 to 1982, 52 years of record.
1,464 records set at South Wales Emery Park still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
South Wales Emery Park set a daily record precipitation of 39.1 mm (1.5 in) on 27 August 1982.

About the Station

Location: New York, United States, 42.72 latitude, -78.60 longitude.
Elevation: 332 m (1,089 ft).
Period of record: 1931 to 1982, 52 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at South Wales Emery Park. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at South Wales Emery Park, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	21.7 C (71.1 F)	-29.4 C (-20.9 F)	n/a	n/a
Feb	21.1 C (70.0 F)	-35.0 C (-31.0 F)	n/a	n/a
Mar	26.7 C (80.1 F)	-23.9 C (-11.0 F)	n/a	n/a
Apr	29.4 C (84.9 F)	-13.9 C (7.0 F)	n/a	n/a
May	32.2 C (90.0 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	36.1 C (97.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	39.4 C (102.9 F)	2.8 C (37.0 F)	n/a	n/a
Aug	36.1 C (97.0 F)	0.6 C (33.1 F)	n/a	n/a
Sep	36.7 C (98.1 F)	-6.1 C (21.0 F)	n/a	n/a
Oct	31.1 C (88.0 F)	-10.6 C (12.9 F)	n/a	n/a
Nov	27.2 C (81.0 F)	-21.7 C (-7.1 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-28.3 C (-18.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at South Wales Emery Park still stand. 1934 holds the most, with 54.

Standing records at South Wales Emery Park by the year they were set
Year set	Standing records
1931	16
1932	37
1933	42
1934	54
1935	27
1936	51
1937	14
1938	28
1939	29
1940	37
1941	31
1942	30
1943	45
1944	25
1945	48
1946	40
1947	43
1948	41
1949	53
1950	45
1951	30
1952	27
1953	25
1954	37
1955	36
1956	31
1957	32
1958	13
1959	30
1960	24
1961	18
1962	28
1963	38
1964	29
1965	26
1966	24
1967	25
1968	20
1969	11
1970	13
1971	17
1972	17
1973	22
1974	25
1975	20
1976	32
1977	19
1978	7
1979	22
1980	6
1981	12
1982	12

All-Time Record Progression

1 new records

1 all-time records were set at South Wales Emery Park between 29 November 1965 and 29 November 1965. Each dot is a new record.

Wettest Day of Each Month

May: 88.9 mm (3.5 in)

The wettest day on record for each calendar month at South Wales Emery Park. The most was 88.9 mm (3.5 in) on 26 May 1953.

Record daily precipitation for each month at South Wales Emery Park
Month	Record daily precipitation (mm)	Date
Jan	45.0 mm (1.8 in)	23 January 1957
Feb	40.1 mm (1.6 in)	17 February 1954
Mar	62.2 mm (2.4 in)	1 March 1955
Apr	59.7 mm (2.4 in)	25 April 1961
May	88.9 mm (3.5 in)	26 May 1953
Jun	54.4 mm (2.1 in)	26 June 1968
Jul	62.2 mm (2.4 in)	11 July 1934
Aug	57.9 mm (2.3 in)	10 August 1938
Sep	61.0 mm (2.4 in)	19 September 1948
Oct	50.8 mm (2.0 in)	2 October 1945
Nov	50.8 mm (2.0 in)	13 November 1967
Dec	45.7 mm (1.8 in)	20 December 1933

Period of Record Coverage

1931 to 1982

52 years of record at South Wales Emery Park, 1931 to 1982. 17 years have data for under 90 percent of days and are left out of rankings: 1931, 1932, 1933, 1934, 1937, 1962, 1965, 1967 and others.

Days with data per year at South Wales Emery Park
Year	Days with data	Share of year	Complete
1931	93	25%	No
1932	325	89%	No
1933	327	90%	No
1934	320	88%	No
1935	336	92%	Yes
1936	330	90%	Yes
1937	328	90%	No
1938	330	90%	Yes
1939	334	92%	Yes
1940	344	94%	Yes
1941	339	93%	Yes
1942	360	99%	Yes
1943	365	100%	Yes
1944	366	100%	Yes
1945	365	100%	Yes
1946	365	100%	Yes
1947	365	100%	Yes
1948	364	99%	Yes
1949	364	100%	Yes
1950	358	98%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	363	99%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	350	96%	Yes
1959	365	100%	Yes
1960	363	99%	Yes
1961	333	91%	Yes
1962	301	82%	No
1963	360	99%	Yes
1964	351	96%	Yes
1965	327	90%	No
1966	363	99%	Yes
1967	326	89%	No
1968	323	88%	No
1969	257	70%	No
1970	339	93%	Yes
1971	304	83%	No
1972	336	92%	Yes
1973	347	95%	Yes
1974	328	90%	No
1975	333	91%	Yes
1976	336	92%	Yes
1977	323	88%	No
1978	333	91%	Yes
1979	170	47%	No
1980	146	40%	No
1981	227	62%	No
1982	140	38%	No

Latest Records

Latest records at South Wales Emery Park
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
27 August 1982	South Wales Emery Park, US	daily rain	39.1 mm (1.5 in)	5.1 mm (0.20 in)	7 years	11 of 100 (Routine)
26 August 1982	South Wales Emery Park, US	daily rain	39.9 mm (1.6 in)	27.2 mm (1.1 in)	16 years	35 of 100 (Notable)
25 August 1982	South Wales Emery Park, US	daily rain	33.8 mm (1.3 in)	1.8 mm (0.07 in)	24 years	13 of 100 (Routine)
24 August 1982	South Wales Emery Park, US	daily high min	20.6 C (69.1 F)	2.3 C (4.1 F)	39 years	21 of 100 (Routine)
26 July 1982	South Wales Emery Park, US	daily high min	23.9 C (75.0 F)	1.7 C (3.1 F)	41 years	21 of 100 (Routine)
19 July 1982	South Wales Emery Park, US	daily high min	22.2 C (72.0 F)	1.6 C (2.9 F)	40 years	21 of 100 (Routine)
8 July 1982	South Wales Emery Park, US	daily high min	23.9 C (75.0 F)	3.9 C (7.0 F)	43 years	27 of 100 (Routine)
9 June 1982	South Wales Emery Park, US	daily high min	22.2 C (72.0 F)	3.3 C (5.9 F)	48 years	26 of 100 (Routine)
2 June 1982	South Wales Emery Park, US	daily high min	20.0 C (68.0 F)	2.2 C (4.0 F)	37 years	20 of 100 (Routine)
1 June 1982	South Wales Emery Park, US	daily high min	19.4 C (66.9 F)	1.6 C (2.9 F)	37 years	19 of 100 (Routine)
20 May 1982	South Wales Emery Park, US	daily high min	16.1 C (61.0 F)	1.1 C (2.0 F)	20 years	13 of 100 (Routine)
19 May 1982	South Wales Emery Park, US	daily high min	18.3 C (64.9 F)	1.1 C (2.0 F)	32 years	16 of 100 (Routine)
8 May 1982	South Wales Emery Park, US	daily high max (Tie)	28.9 C (84.0 F)	tie	45 years	4 of 100 (Routine)
8 April 1982	South Wales Emery Park, US	daily low max	-3.9 C (25.0 F)	3.9 C (7.0 F)	44 years	23 of 100 (Routine)
7 April 1982	South Wales Emery Park, US	monthly low max	-7.2 C (19.0 F)	1.1 C (2.0 F)	7 years	18 of 100 (Routine)
4 January 1982	South Wales Emery Park, US	daily high min	8.3 C (46.9 F)	7.2 C (13.0 F)	31 years	24 of 100 (Routine)
27 November 1981	South Wales Emery Park, US	daily rain	23.6 mm (0.9 in)	4.5 mm (0.18 in)	35 years	20 of 100 (Routine)
23 September 1981	South Wales Emery Park, US	daily low max	10.0 C (50.0 F)	1.1 C (2.0 F)	34 years	17 of 100 (Routine)
14 September 1981	South Wales Emery Park, US	daily high min	20.0 C (68.0 F)	1.1 C (2.0 F)	24 years	14 of 100 (Routine)
3 September 1981	South Wales Emery Park, US	daily high min	22.2 C (72.0 F)	1.1 C (2.0 F)	44 years	20 of 100 (Routine)

Climate Trend

32 complete years, 1932 to 1973

One stripe for each of 32 complete years at South Wales Emery Park, 1932 to 1973. Blue stripes are years cooler than the station's own mean of 8.0 C (46.4 F); red stripes are warmer. The coolest year was 1940, at 6.4 C (43.5 F), and the warmest was 1949, at 9.2 C (48.6 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at South Wales Emery Park as warming stripes, 1932 to 1973
Year	Annual mean temperature	Difference from the station mean
1932	8.8 C	+0.80 C
1933	9.0 C	+1.01 C
1934	7.7 C	-0.34 C
1935	7.4 C	-0.61 C
1936	8.1 C	+0.12 C
1937	8.0 C	+0.01 C
1938	8.6 C	+0.62 C
1939	7.9 C	-0.11 C
1940	6.4 C	-1.59 C
1941	8.0 C	+0.03 C
1942	7.7 C	-0.35 C
1943	6.7 C	-1.28 C
1944	8.4 C	+0.36 C
1945	7.8 C	-0.21 C
1946	8.6 C	+0.63 C
1947	7.9 C	-0.08 C
1948	8.0 C	+0.04 C
1949	9.2 C	+1.21 C
1950	7.4 C	-0.63 C
1951	7.8 C	-0.18 C
1952	8.3 C	+0.25 C
1953	8.7 C	+0.69 C
1954	8.1 C	+0.12 C
1955	8.6 C	+0.63 C
1956	7.5 C	-0.52 C
1957	8.1 C	+0.09 C
1959	8.4 C	+0.41 C
1960	7.8 C	-0.22 C
1963	6.5 C	-1.48 C
1964	7.8 C	-0.16 C
1966	7.5 C	-0.50 C
1973	9.2 C	+1.19 C

The fitted trend in annual mean temperature here over 1932 to 1973 is 0.00 C (-0.24 to 0.24) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.00 F (-0.43 to 0.44) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at South Wales Emery Park
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.00 C (-0.24 to 0.24) per decade	0.00 F (-0.43 to 0.44) per decade	1932 to 1973	32	Not clearly different from zero
Mean daily maximum	-0.04 C (-0.31 to 0.23) per decade	-0.1 F (-0.6 to 0.4) per decade	1932 to 1973	32	Not clearly different from zero
Mean daily minimum	0.05 C (-0.22 to 0.31) per decade	0.1 F (-0.4 to 0.6) per decade	1932 to 1973	32	Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1931 to 1982

Yearly extremes at South Wales Emery Park: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.4 C (102.9 F)	1936	32.8 C (91.0 F)	52
Coldest night (TNn)	-35.0 C (-31.0 F)	1934	-23.3 C (-9.9 F)	52
Wettest day (Rx1day)	88.9 mm (3.5 in)	1953	46.0 mm (1.8 in)	52
Wettest five days (Rx5day)	130.7 mm (5.1 in)	1977	75.3 mm (3.0 in)	52
Longest dry spell (CDD)	49 days	1982	15 days	52

Hottest day (TXx)

The hottest day of the year at South Wales Emery Park, 1931 to 1982. The record is 39.4 C (102.9 F) in 1936, marked on the chart; the median year is 32.8 C (91.0 F).

Hottest day (TXx) at South Wales Emery Park by year
Year	Hottest day (TXx)
1931	31.7 C (89.1 F)
1932	33.3 C (91.9 F)
1933	37.8 C (100.0 F)
1934	35.6 C (96.1 F)
1935	34.4 C (93.9 F)
1936	39.4 C (102.9 F)
1937	32.2 C (90.0 F)
1938	32.2 C (90.0 F)
1939	32.2 C (90.0 F)
1940	33.3 C (91.9 F)
1941	35.0 C (95.0 F)
1942	31.7 C (89.1 F)
1943	32.2 C (90.0 F)
1944	34.4 C (93.9 F)
1945	34.4 C (93.9 F)
1946	36.1 C (97.0 F)
1947	33.3 C (91.9 F)
1948	36.1 C (97.0 F)
1949	33.9 C (93.0 F)
1950	32.2 C (90.0 F)
1951	33.3 C (91.9 F)
1952	33.9 C (93.0 F)
1953	36.7 C (98.1 F)
1954	31.7 C (89.1 F)
1955	36.1 C (97.0 F)
1956	31.7 C (89.1 F)
1957	34.4 C (93.9 F)
1958	30.6 C (87.1 F)
1959	33.9 C (93.0 F)
1960	32.8 C (91.0 F)
1961	31.1 C (88.0 F)
1962	32.8 C (91.0 F)
1963	33.9 C (93.0 F)
1964	35.0 C (95.0 F)
1965	32.2 C (90.0 F)
1966	33.9 C (93.0 F)
1967	32.8 C (91.0 F)
1968	32.8 C (91.0 F)
1969	33.3 C (91.9 F)
1970	31.1 C (88.0 F)
1971	31.7 C (89.1 F)
1972	31.1 C (88.0 F)
1973	33.3 C (91.9 F)
1974	30.6 C (87.1 F)
1975	32.8 C (91.0 F)
1976	31.7 C (89.1 F)
1977	32.8 C (91.0 F)
1978	35.6 C (96.1 F)
1979	30.0 C (86.0 F)
1980	32.2 C (90.0 F)
1981	31.7 C (89.1 F)
1982	32.2 C (90.0 F)

Coldest night (TNn)

The coldest night of the year at South Wales Emery Park, 1931 to 1982. The record is -35.0 C (-31.0 F) in 1934, marked on the chart; the median year is -23.3 C (-9.9 F).

Coldest night (TNn) at South Wales Emery Park by year
Year	Coldest night (TNn)
1931	-15.6 C (3.9 F)
1932	-18.9 C (-2.0 F)
1933	-25.6 C (-14.1 F)
1934	-35.0 C (-31.0 F)
1935	-24.4 C (-11.9 F)
1936	-23.3 C (-9.9 F)
1937	-20.0 C (-4.0 F)
1938	-22.2 C (-8.0 F)
1939	-23.3 C (-9.9 F)
1940	-22.8 C (-9.0 F)
1941	-23.9 C (-11.0 F)
1942	-26.7 C (-16.1 F)
1943	-28.3 C (-18.9 F)
1944	-25.0 C (-13.0 F)
1945	-25.6 C (-14.1 F)
1946	-23.3 C (-9.9 F)
1947	-18.9 C (-2.0 F)
1948	-27.2 C (-17.0 F)
1949	-20.0 C (-4.0 F)
1950	-23.3 C (-9.9 F)
1951	-23.3 C (-9.9 F)
1952	-23.3 C (-9.9 F)
1953	-20.6 C (-5.1 F)
1954	-21.1 C (-6.0 F)
1955	-23.3 C (-9.9 F)
1956	-17.2 C (1.0 F)
1957	-28.9 C (-20.0 F)
1958	-22.2 C (-8.0 F)
1959	-25.0 C (-13.0 F)
1960	-22.8 C (-9.0 F)
1961	-27.8 C (-18.0 F)
1962	-25.6 C (-14.1 F)
1963	-27.8 C (-18.0 F)
1964	-23.3 C (-9.9 F)
1965	-27.8 C (-18.0 F)
1966	-23.3 C (-9.9 F)
1967	-24.4 C (-11.9 F)
1968	-25.0 C (-13.0 F)
1969	-17.8 C (0.0 F)
1970	-24.4 C (-11.9 F)
1971	-22.2 C (-8.0 F)
1972	-22.8 C (-9.0 F)
1973	-24.4 C (-11.9 F)
1974	-20.6 C (-5.1 F)
1975	-17.8 C (0.0 F)
1976	-29.4 C (-20.9 F)
1977	-23.9 C (-11.0 F)
1978	-23.3 C (-9.9 F)
1979	-28.9 C (-20.0 F)
1980	-16.1 C (3.0 F)
1981	-18.9 C (-2.0 F)
1982	-18.9 C (-2.0 F)

Wettest day (Rx1day)

The wettest day of the year at South Wales Emery Park, 1931 to 1982. The record is 88.9 mm (3.5 in) in 1953, marked on the chart; the median year is 46.0 mm (1.8 in).

Wettest day (Rx1day) at South Wales Emery Park by year
Year	Wettest day (Rx1day)
1931	33.0 mm (1.3 in)
1932	43.2 mm (1.7 in)
1933	48.3 mm (1.9 in)
1934	62.2 mm (2.4 in)
1935	47.8 mm (1.9 in)
1936	45.0 mm (1.8 in)
1937	40.9 mm (1.6 in)
1938	57.9 mm (2.3 in)
1939	55.9 mm (2.2 in)
1940	35.6 mm (1.4 in)
1941	46.2 mm (1.8 in)
1942	37.6 mm (1.5 in)
1943	51.1 mm (2.0 in)
1944	50.8 mm (2.0 in)
1945	50.8 mm (2.0 in)
1946	51.3 mm (2.0 in)
1947	38.1 mm (1.5 in)
1948	61.0 mm (2.4 in)
1949	52.1 mm (2.1 in)
1950	40.6 mm (1.6 in)
1951	38.1 mm (1.5 in)
1952	45.7 mm (1.8 in)
1953	88.9 mm (3.5 in)
1954	40.1 mm (1.6 in)
1955	62.2 mm (2.4 in)
1956	37.6 mm (1.5 in)
1957	45.0 mm (1.8 in)
1958	40.4 mm (1.6 in)
1959	41.9 mm (1.6 in)
1960	25.9 mm (1.0 in)
1961	59.7 mm (2.4 in)
1962	50.8 mm (2.0 in)
1963	44.5 mm (1.8 in)
1964	49.0 mm (1.9 in)
1965	41.9 mm (1.6 in)
1966	48.3 mm (1.9 in)
1967	58.4 mm (2.3 in)
1968	54.6 mm (2.1 in)
1969	49.3 mm (1.9 in)
1970	33.3 mm (1.3 in)
1971	49.5 mm (1.9 in)
1972	52.1 mm (2.1 in)
1973	37.1 mm (1.5 in)
1974	36.6 mm (1.4 in)
1975	52.1 mm (2.1 in)
1976	51.8 mm (2.0 in)
1977	53.3 mm (2.1 in)
1978	43.4 mm (1.7 in)
1979	38.9 mm (1.5 in)
1980	38.1 mm (1.5 in)
1981	35.6 mm (1.4 in)
1982	39.9 mm (1.6 in)

Wettest five days (Rx5day)

The wettest five days of the year at South Wales Emery Park, 1931 to 1982. The record is 130.7 mm (5.1 in) in 1977, marked on the chart; the median year is 75.3 mm (3.0 in).

Wettest five days (Rx5day) at South Wales Emery Park by year
Year	Wettest five days (Rx5day)
1931	53.9 mm (2.1 in)
1932	76.2 mm (3.0 in)
1933	63.4 mm (2.5 in)
1934	62.2 mm (2.4 in)
1935	68.4 mm (2.7 in)
1936	98.7 mm (3.9 in)
1937	76.9 mm (3.0 in)
1938	69.9 mm (2.8 in)
1939	107.0 mm (4.2 in)
1940	75.5 mm (3.0 in)
1941	105.3 mm (4.1 in)
1942	89.2 mm (3.5 in)
1943	73.2 mm (2.9 in)
1944	75.0 mm (3.0 in)
1945	91.3 mm (3.6 in)
1946	76.8 mm (3.0 in)
1947	76.8 mm (3.0 in)
1948	89.5 mm (3.5 in)
1949	60.8 mm (2.4 in)
1950	60.9 mm (2.4 in)
1951	65.3 mm (2.6 in)
1952	92.5 mm (3.6 in)
1953	104.9 mm (4.1 in)
1954	78.2 mm (3.1 in)
1955	88.9 mm (3.5 in)
1956	90.7 mm (3.6 in)
1957	73.7 mm (2.9 in)
1958	61.2 mm (2.4 in)
1959	87.9 mm (3.5 in)
1960	45.4 mm (1.8 in)
1961	100.8 mm (4.0 in)
1962	87.9 mm (3.5 in)
1963	71.1 mm (2.8 in)
1964	57.9 mm (2.3 in)
1965	60.5 mm (2.4 in)
1966	58.5 mm (2.3 in)
1967	79.0 mm (3.1 in)
1968	78.8 mm (3.1 in)
1969	90.4 mm (3.6 in)
1970	63.7 mm (2.5 in)
1971	49.5 mm (1.9 in)
1972	108.0 mm (4.3 in)
1973	70.0 mm (2.8 in)
1974	68.8 mm (2.7 in)
1975	74.2 mm (2.9 in)
1976	85.6 mm (3.4 in)
1977	130.7 mm (5.1 in)
1978	84.8 mm (3.3 in)
1979	64.1 mm (2.5 in)
1980	61.1 mm (2.4 in)
1981	27.4 mm (1.1 in)
1982	72.3 mm (2.8 in)

Longest dry spell (CDD)

The longest dry spell of the year at South Wales Emery Park, 1931 to 1982. The record is 49 days in 1982, marked on the chart; the median year is 15 days.

Longest dry spell (CDD) at South Wales Emery Park by year
Year	Longest dry spell (CDD)
1931	9 days
1932	11 days
1933	13 days
1934	21 days
1935	19 days
1936	26 days
1937	18 days
1938	11 days
1939	17 days
1940	12 days
1941	21 days
1942	14 days
1943	15 days
1944	17 days
1945	15 days
1946	11 days
1947	14 days
1948	19 days
1949	14 days
1950	12 days
1951	14 days
1952	15 days
1953	15 days
1954	16 days
1955	15 days
1956	18 days
1957	23 days
1958	10 days
1959	16 days
1960	13 days
1961	11 days
1962	13 days
1963	41 days
1964	29 days
1965	9 days
1966	19 days
1967	25 days
1968	18 days
1969	17 days
1970	22 days
1971	27 days
1972	21 days
1973	12 days
1974	15 days
1975	12 days
1976	12 days
1977	12 days
1978	21 days
1979	9 days
1980	19 days
1981	29 days
1982	49 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

32 years with a frost

Across 32 years with a frost, the median last spring frost at South Wales Emery Park falls on 17 May and the median first autumn frost on 30 September, which leaves a median of 135 days between them.

Fitted over all years, the growing season changes by -3.4 days per decade at this station.

Frost dates and growing season at South Wales Emery Park
Measure	Median, all years	Earliest period	Recent period (1934 to 1973)	Recent against earliest	Fitted trend
Last spring frost	17 May	n/a	17 May	n/a	+2.5 days per decade
First autumn frost	30 September	n/a	30 September	n/a	-0.9 days per decade
Growing days	135 days	n/a	135 days	n/a	-3.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

46 years, 1932 to 1978

A day with at least 46.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 75.2 mm (3.0 in) of rain is expected about once in 100 years.

Rainfall return levels at South Wales Emery Park: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	46.6 mm (1.8 in)
5 years	55.4 mm (2.2 in)
10 years	60.7 mm (2.4 in)
25 years	66.9 mm (2.6 in)
50 years	71.2 mm (2.8 in)	Longer than the 46 years of record
100 years	75.2 mm (3.0 in)	Longer than the 46 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 46 years of values from 1932 to 1978.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 88.9 mm (3.5 in) in 1953; 62.2 mm (2.4 in) in 1934; 62.2 mm (2.4 in) in 1955.

Download the Data

Data for South Wales Emery Park standing records by year: CSV or JSON. Field meanings are on the data page.
Data for South Wales Emery Park threshold days by year: CSV or JSON. Field meanings are on the data page.

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)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

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