Carrollton Lock 1 Weather Records (USC00151345)

Record envelope, standing records and threshold days for Carrollton Lock 1 (USC00151345), Kentucky, United States, with 110 years of record.

Key Facts for Carrollton Lock 1

Carrollton Lock 1 (USC00151345) is a weather station in Kentucky, United States at 38.66 latitude and -85.15 longitude, 137 m (450 ft) above sea level.
The station reports from 1893 to 2002, 110 years of record.
1,464 records set at Carrollton Lock 1 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Carrollton Lock 1 set a daily record precipitation of 86.9 mm (3.4 in) on 28 June 2002.

About the Station

Location: Kentucky, United States, 38.66 latitude, -85.15 longitude.
Elevation: 137 m (450 ft).
Period of record: 1893 to 2002, 110 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 Carrollton Lock 1. 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 Carrollton Lock 1, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.2 C (72.0 F)	-30.0 C (-22.0 F)	n/a	n/a
Feb	26.7 C (80.1 F)	-28.9 C (-20.0 F)	n/a	n/a
Mar	31.1 C (88.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-8.3 C (17.1 F)	n/a	n/a
May	36.7 C (98.1 F)	-2.8 C (27.0 F)	n/a	n/a
Jun	40.0 C (104.0 F)	2.2 C (36.0 F)	n/a	n/a
Jul	40.6 C (105.1 F)	7.8 C (46.0 F)	n/a	n/a
Aug	40.0 C (104.0 F)	5.6 C (42.1 F)	n/a	n/a
Sep	39.4 C (102.9 F)	0.0 C (32.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-9.4 C (15.1 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-18.9 C (-2.0 F)	n/a	n/a
Dec	23.9 C (75.0 F)	-27.8 C (-18.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Carrollton Lock 1 still stand. 1895 holds the most, with 77.

Standing records at Carrollton Lock 1 by the year they were set
Year set	Standing records
1893	1
1894	21
1895	77
1896	50
1897	43
1898	48
1899	55
1900	41
1901	34
1902	34
1903	13
1951	29
1952	28
1953	28
1954	41
1955	17
1956	24
1957	13
1958	17
1959	24
1960	25
1961	14
1962	27
1963	30
1964	27
1965	19
1966	27
1967	30
1968	14
1969	13
1970	23
1971	20
1972	21
1973	10
1974	29
1975	18
1976	30
1977	34
1978	15
1979	15
1980	13
1981	9
1982	28
1983	22
1984	24
1985	16
1986	25
1987	12
1988	50
1989	22
1990	18
1991	20
1992	11
1993	9
1994	4
1995	9
1996	19
1997	20
1998	18
1999	10
2000	13
2001	9
2002	4

All-Time Record Progression

6 new records

6 all-time records were set at Carrollton Lock 1 between 11 April 1947 and 20 January 1978. Each dot is a new record.

When Carrollton Lock 1 set new all-time records
Date	Kind	Detail
1947-04-11	Record daily precipitation	Record daily precipitation 210.8 mm (8.3 in)
1966-02-02	Record daily snowfall	Record daily snowfall 29.2 cm (11.5 in)
1966-02-02	Record snow depth	Record snow depth 40.6 cm (16.0 in)
1968-03-23	Record daily snowfall	Record daily snowfall 30.5 cm (12.0 in)
1977-01-17	Record low minimum temperature	Record low minimum temperature -30.0 C (-22.0 F)
1978-01-20	Record snow depth	Record snow depth 45.7 cm (18.0 in)

Wettest Day of Each Month

Apr: 210.8 mm (8.3 in)

The wettest day on record for each calendar month at Carrollton Lock 1. The most was 210.8 mm (8.3 in) on 11 April 1947.

Record daily precipitation for each month at Carrollton Lock 1
Month	Record daily precipitation (mm)	Date
Jan	85.1 mm (3.4 in)	23 January 1982
Feb	100.3 mm (3.9 in)	21 February 1897
Mar	93.0 mm (3.7 in)	5 March 1964
Apr	210.8 mm (8.3 in)	11 April 1947
May	99.1 mm (3.9 in)	8 May 1927
Jun	108.0 mm (4.3 in)	14 June 1960
Jul	77.5 mm (3.1 in)	15 July 1986
Aug	128.3 mm (5.1 in)	3 August 1932
Sep	144.8 mm (5.7 in)	14 September 1979
Oct	101.6 mm (4.0 in)	21 October 1983
Nov	81.3 mm (3.2 in)	6 November 1948
Dec	131.1 mm (5.2 in)	24 December 1921

Period of Record Coverage

1894 to 2002

62 years of record at Carrollton Lock 1, 1894 to 2002. 12 years have data for under 90 percent of days and are left out of rankings: 1894, 1896, 1903, 1985, 1986, 1989, 1994, 1995 and others.

Days with data per year at Carrollton Lock 1
Year	Days with data	Share of year	Complete
1894	179	49%	No
1895	354	97%	Yes
1896	320	87%	No
1897	341	93%	Yes
1898	350	96%	Yes
1899	342	94%	Yes
1900	348	95%	Yes
1901	344	94%	Yes
1902	353	97%	Yes
1903	118	32%	No
1951	355	97%	Yes
1952	362	99%	Yes
1953	355	97%	Yes
1954	358	98%	Yes
1955	364	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	362	99%	Yes
1959	362	99%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	335	92%	Yes
1965	363	99%	Yes
1966	364	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	364	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	365	100%	Yes
1977	363	99%	Yes
1978	361	99%	Yes
1979	363	99%	Yes
1980	363	99%	Yes
1981	360	99%	Yes
1982	353	97%	Yes
1983	334	92%	Yes
1984	342	93%	Yes
1985	301	82%	No
1986	324	89%	No
1987	348	95%	Yes
1988	352	96%	Yes
1989	316	87%	No
1990	357	98%	Yes
1991	339	93%	Yes
1992	334	91%	Yes
1993	340	93%	Yes
1994	276	76%	No
1995	316	87%	No
1996	334	91%	Yes
1997	315	86%	No
1998	345	95%	Yes
1999	351	96%	Yes
2000	321	88%	No
2001	217	59%	No
2002	103	28%	No

Latest Records

Latest records at Carrollton Lock 1
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
28 June 2002	Carrollton Lock 1, US	daily rain	86.9 mm (3.4 in)	38.9 mm (1.5 in)	69 years	59 of 100 (Notable)
7 June 2002	Carrollton Lock 1, US	daily rain	56.4 mm (2.2 in)	11.9 mm (0.5 in)	12 years	22 of 100 (Routine)
22 May 2002	Carrollton Lock 1, US	daily low min	0.6 C (33.1 F)	1.1 C (2.0 F)	106 years	42 of 100 (Notable)
7 May 2002	Carrollton Lock 1, US	daily rain	41.7 mm (1.6 in)	7.9 mm (0.31 in)	45 years	29 of 100 (Routine)
29 April 2002	Carrollton Lock 1, US	daily low max	11.1 C (52.0 F)	2.2 C (4.0 F)	21 years	19 of 100 (Routine)
26 March 2002	Carrollton Lock 1, US	daily rain	38.9 mm (1.5 in)	13.2 mm (0.5 in)	52 years	35 of 100 (Notable)
4 March 2002	Carrollton Lock 1, US	daily low max	-5.0 C (23.0 F)	2.2 C (4.0 F)	41 years	25 of 100 (Routine)
4 March 2002	Carrollton Lock 1, US	daily low min	-13.3 C (8.1 F)	1.6 C (2.9 F)	24 years	19 of 100 (Routine)
31 January 2002	Carrollton Lock 1, US	daily rain (Tie)	26.7 mm (1.1 in)	tie	20 years	4 of 100 (Routine)
14 December 2001	Carrollton Lock 1, US	daily high min (Tie)	11.7 C (53.1 F)	tie	26 years	4 of 100 (Routine)
29 November 2001	Carrollton Lock 1, US	daily rain	35.1 mm (1.4 in)	13.5 mm (0.5 in)	72 years	43 of 100 (Notable)
29 November 2001	Carrollton Lock 1, US	daily high min	11.7 C (53.1 F)	4.5 C (8.1 F)	3 years	17 of 100 (Routine)
24 October 2001	Carrollton Lock 1, US	daily rain	75.2 mm (3.0 in)	17.3 mm (0.7 in)	50 years	39 of 100 (Notable)
23 October 2001	Carrollton Lock 1, US	daily high min	16.1 C (61.0 F)	0.5 C (0.9 F)	100 years	40 of 100 (Notable)
12 October 2001	Carrollton Lock 1, US	daily rain	32.0 mm (1.3 in)	9.1 mm (0.36 in)	74 years	39 of 100 (Notable)
8 September 2001	Carrollton Lock 1, US	daily rain	21.1 mm (0.8 in)	1.8 mm (0.07 in)	72 years	20 of 100 (Routine)
26 July 2001	Carrollton Lock 1, US	daily low max	25.0 C (77.0 F)	1.7 C (3.1 F)	22 years	21 of 100 (Routine)
13 July 2001	Carrollton Lock 1, US	daily low min (Tie)	12.8 C (55.0 F)	tie	42 years	5 of 100 (Routine)
6 June 2001	Carrollton Lock 1, US	daily rain	42.2 mm (1.7 in)	2.1 mm (0.08 in)	67 years	31 of 100 (Routine)
12 April 2001	Carrollton Lock 1, US	daily high min	20.6 C (69.1 F)	5.0 C (9.0 F)	101 years	48 of 100 (Notable)

Climate Trend

52 complete years, 1895 to 1999

One stripe for each of 52 complete years at Carrollton Lock 1, 1895 to 1999. Blue stripes are years cooler than the station's own mean of 13.2 C (55.8 F); red stripes are warmer. The coolest year was 1958, at 11.8 C (53.2 F), and the warmest was 1998, at 14.9 C (58.8 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Carrollton Lock 1 as warming stripes, 1895 to 1999
Year	Annual mean temperature	Difference from the station mean
1895	12.4 C	-0.83 C
1897	14.0 C	+0.75 C
1898	14.3 C	+1.08 C
1899	13.6 C	+0.41 C
1900	14.0 C	+0.80 C
1901	12.9 C	-0.34 C
1902	13.4 C	+0.19 C
1951	13.0 C	-0.23 C
1952	13.9 C	+0.73 C
1953	14.2 C	+0.97 C
1954	14.2 C	+0.95 C
1955	13.3 C	+0.11 C
1956	13.4 C	+0.18 C
1957	13.4 C	+0.15 C
1958	11.8 C	-1.41 C
1959	13.7 C	+0.44 C
1960	12.5 C	-0.75 C
1961	12.8 C	-0.43 C
1962	12.8 C	-0.41 C
1963	12.2 C	-1.00 C
1965	13.4 C	+0.17 C
1966	12.4 C	-0.83 C
1967	12.8 C	-0.43 C
1968	12.6 C	-0.62 C
1969	12.5 C	-0.69 C
1970	13.2 C	+0.03 C
1971	13.2 C	-0.01 C
1972	12.8 C	-0.37 C
1973	13.8 C	+0.59 C
1974	13.3 C	+0.05 C
1975	13.5 C	+0.30 C
1976	12.4 C	-0.83 C
1977	12.8 C	-0.44 C
1978	11.8 C	-1.39 C
1979	12.2 C	-1.05 C
1980	12.8 C	-0.46 C
1981	12.6 C	-0.57 C
1982	13.1 C	-0.11 C
1983	13.6 C	+0.38 C
1984	13.6 C	+0.35 C
1985	13.6 C	+0.38 C
1986	14.0 C	+0.75 C
1987	13.7 C	+0.50 C
1988	12.5 C	-0.76 C
1990	14.1 C	+0.84 C
1991	14.5 C	+1.31 C
1992	12.8 C	-0.44 C
1993	12.8 C	-0.46 C
1995	13.2 C	-0.06 C
1996	13.0 C	-0.22 C
1998	14.9 C	+1.70 C
1999	14.2 C	+0.95 C

The fitted trend in annual mean temperature here over 1895 to 1999 is -0.02 C (-0.09 to 0.05) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.16 to 0.09) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Carrollton Lock 1
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.02 C (-0.09 to 0.05) per decade	-0.03 F (-0.16 to 0.09) per decade	1895 to 1999	52	Not clearly different from zero
Mean daily maximum	0.07 C (-0.01 to 0.15) per decade	0.13 F (-0.02 to 0.28) per decade	1895 to 1999	52	Not clearly different from zero
Mean daily minimum	-0.10 C (-0.19 to -0.01) per decade	-0.19 F (-0.35 to -0.03) per decade	1895 to 1999	52	Fall

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

1893 to 2002

Yearly extremes at Carrollton Lock 1: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.6 C (105.1 F)	1952	35.6 C (96.1 F)	62
Coldest night (TNn)	-30.0 C (-22.0 F)	1977	-20.0 C (-4.0 F)	63
Wettest day (Rx1day)	210.8 mm (8.3 in)	1947	61.7 mm (2.4 in)	97
Wettest five days (Rx5day)	235.9 mm (9.3 in)	1937	96.8 mm (3.8 in)	97
Longest dry spell (CDD)	44 days	1901	19 days	97

Hottest day (TXx)

The hottest day of the year at Carrollton Lock 1, 1893 to 2002. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 35.6 C (96.1 F).

Hottest day (TXx) at Carrollton Lock 1 by year
Year	Hottest day (TXx)
1893	n/a
1894	40.0 C (104.0 F)
1895	40.0 C (104.0 F)
1896	37.2 C (99.0 F)
1897	38.9 C (102.0 F)
1898	37.8 C (100.0 F)
1899	37.2 C (99.0 F)
1900	36.7 C (98.1 F)
1901	39.4 C (102.9 F)
1902	37.2 C (99.0 F)
1903	31.1 C (88.0 F)
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	36.7 C (98.1 F)
1952	40.6 C (105.1 F)
1953	39.4 C (102.9 F)
1954	40.6 C (105.1 F)
1955	35.0 C (95.0 F)
1956	36.7 C (98.1 F)
1957	35.0 C (95.0 F)
1958	33.3 C (91.9 F)
1959	36.1 C (97.0 F)
1960	35.6 C (96.1 F)
1961	33.9 C (93.0 F)
1962	36.7 C (98.1 F)
1963	34.4 C (93.9 F)
1964	38.3 C (100.9 F)
1965	36.1 C (97.0 F)
1966	38.3 C (100.9 F)
1967	33.3 C (91.9 F)
1968	33.9 C (93.0 F)
1969	34.4 C (93.9 F)
1970	36.7 C (98.1 F)
1971	34.4 C (93.9 F)
1972	33.9 C (93.0 F)
1973	33.3 C (91.9 F)
1974	32.2 C (90.0 F)
1975	33.3 C (91.9 F)
1976	34.4 C (93.9 F)
1977	35.0 C (95.0 F)
1978	33.9 C (93.0 F)
1979	33.9 C (93.0 F)
1980	37.2 C (99.0 F)
1981	33.9 C (93.0 F)
1982	34.4 C (93.9 F)
1983	39.4 C (102.9 F)
1984	35.0 C (95.0 F)
1985	35.6 C (96.1 F)
1986	36.1 C (97.0 F)
1987	36.1 C (97.0 F)
1988	40.6 C (105.1 F)
1989	33.9 C (93.0 F)
1990	35.6 C (96.1 F)
1991	37.2 C (99.0 F)
1992	32.2 C (90.0 F)
1993	35.0 C (95.0 F)
1994	35.0 C (95.0 F)
1995	36.1 C (97.0 F)
1996	35.6 C (96.1 F)
1997	36.7 C (98.1 F)
1998	34.4 C (93.9 F)
1999	38.9 C (102.0 F)
2000	33.3 C (91.9 F)
2001	33.9 C (93.0 F)
2002	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Carrollton Lock 1, 1893 to 2002. The record is -30.0 C (-22.0 F) in 1977, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Carrollton Lock 1 by year
Year	Coldest night (TNn)
1893	-25.6 C (-14.1 F)
1894	-20.0 C (-4.0 F)
1895	-25.0 C (-13.0 F)
1896	-17.8 C (0.0 F)
1897	-21.1 C (-6.0 F)
1898	-18.9 C (-2.0 F)
1899	-28.9 C (-20.0 F)
1900	-18.9 C (-2.0 F)
1901	-22.2 C (-8.0 F)
1902	-18.9 C (-2.0 F)
1903	-20.0 C (-4.0 F)
1917	n/a
1918	n/a
1919	n/a
1920	n/a
1921	n/a
1922	n/a
1923	n/a
1924	n/a
1925	n/a
1926	n/a
1927	n/a
1928	n/a
1929	n/a
1930	n/a
1931	n/a
1932	n/a
1933	n/a
1934	n/a
1935	n/a
1936	n/a
1937	n/a
1938	n/a
1939	n/a
1940	n/a
1941	n/a
1942	n/a
1943	n/a
1944	n/a
1945	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	-27.8 C (-18.0 F)
1952	-14.4 C (6.1 F)
1953	-17.8 C (0.0 F)
1954	-17.8 C (0.0 F)
1955	-18.3 C (-0.9 F)
1956	-14.4 C (6.1 F)
1957	-21.7 C (-7.1 F)
1958	-19.4 C (-2.9 F)
1959	-20.6 C (-5.1 F)
1960	-20.0 C (-4.0 F)
1961	-22.8 C (-9.0 F)
1962	-23.3 C (-9.9 F)
1963	-28.3 C (-18.9 F)
1964	-15.6 C (3.9 F)
1965	-20.6 C (-5.1 F)
1966	-22.8 C (-9.0 F)
1967	-19.4 C (-2.9 F)
1968	-23.3 C (-9.9 F)
1969	-17.2 C (1.0 F)
1970	-21.1 C (-6.0 F)
1971	-20.6 C (-5.1 F)
1972	-23.3 C (-9.9 F)
1973	-15.6 C (3.9 F)
1974	-13.3 C (8.1 F)
1975	-13.3 C (8.1 F)
1976	-18.9 C (-2.0 F)
1977	-30.0 C (-22.0 F)
1978	-22.2 C (-8.0 F)
1979	-21.1 C (-6.0 F)
1980	-20.6 C (-5.1 F)
1981	-20.6 C (-5.1 F)
1982	-27.8 C (-18.0 F)
1983	-21.1 C (-6.0 F)
1984	-26.1 C (-15.0 F)
1985	-30.0 C (-22.0 F)
1986	-18.3 C (-0.9 F)
1987	-17.2 C (1.0 F)
1988	-20.6 C (-5.1 F)
1989	-27.8 C (-18.0 F)
1990	-13.3 C (8.1 F)
1991	-15.6 C (3.9 F)
1992	-17.2 C (1.0 F)
1993	-17.8 C (0.0 F)
1994	-18.9 C (-2.0 F)
1995	-17.2 C (1.0 F)
1996	-22.2 C (-8.0 F)
1997	-18.3 C (-0.9 F)
1998	-12.2 C (10.0 F)
1999	-19.4 C (-2.9 F)
2000	-20.0 C (-4.0 F)
2001	-18.3 C (-0.9 F)
2002	-13.3 C (8.1 F)

Wettest day (Rx1day)

The wettest day of the year at Carrollton Lock 1, 1893 to 2002. The record is 210.8 mm (8.3 in) in 1947, marked on the chart; the median year is 61.7 mm (2.4 in).

Wettest day (Rx1day) at Carrollton Lock 1 by year
Year	Wettest day (Rx1day)
1893	58.4 mm (2.3 in)
1894	40.4 mm (1.6 in)
1895	63.5 mm (2.5 in)
1896	50.8 mm (2.0 in)
1897	100.3 mm (3.9 in)
1898	73.2 mm (2.9 in)
1899	55.9 mm (2.2 in)
1900	61.0 mm (2.4 in)
1901	53.8 mm (2.1 in)
1902	42.7 mm (1.7 in)
1903	36.6 mm (1.4 in)
1917	61.0 mm (2.4 in)
1918	48.8 mm (1.9 in)
1919	68.1 mm (2.7 in)
1920	109.7 mm (4.3 in)
1921	131.1 mm (5.2 in)
1922	67.3 mm (2.6 in)
1923	48.3 mm (1.9 in)
1924	61.5 mm (2.4 in)
1925	57.2 mm (2.3 in)
1926	57.7 mm (2.3 in)
1927	99.1 mm (3.9 in)
1928	47.2 mm (1.9 in)
1929	59.9 mm (2.4 in)
1930	39.4 mm (1.6 in)
1931	63.5 mm (2.5 in)
1932	128.3 mm (5.1 in)
1933	97.8 mm (3.9 in)
1934	61.7 mm (2.4 in)
1935	81.3 mm (3.2 in)
1936	54.6 mm (2.1 in)
1937	74.4 mm (2.9 in)
1938	58.2 mm (2.3 in)
1939	62.5 mm (2.5 in)
1940	62.5 mm (2.5 in)
1941	71.9 mm (2.8 in)
1942	59.7 mm (2.4 in)
1943	73.7 mm (2.9 in)
1944	52.1 mm (2.1 in)
1945	56.1 mm (2.2 in)
1946	58.4 mm (2.3 in)
1947	210.8 mm (8.3 in)
1948	81.3 mm (3.2 in)
1949	80.0 mm (3.1 in)
1950	58.4 mm (2.3 in)
1951	57.9 mm (2.3 in)
1952	53.8 mm (2.1 in)
1953	29.2 mm (1.1 in)
1954	71.6 mm (2.8 in)
1955	96.5 mm (3.8 in)
1956	57.2 mm (2.3 in)
1957	64.3 mm (2.5 in)
1958	50.8 mm (2.0 in)
1959	40.6 mm (1.6 in)
1960	108.0 mm (4.3 in)
1961	82.0 mm (3.2 in)
1962	45.0 mm (1.8 in)
1963	63.5 mm (2.5 in)
1964	93.0 mm (3.7 in)
1965	86.6 mm (3.4 in)
1966	57.9 mm (2.3 in)
1967	36.3 mm (1.4 in)
1968	40.6 mm (1.6 in)
1969	82.6 mm (3.3 in)
1970	45.0 mm (1.8 in)
1971	79.8 mm (3.1 in)
1972	61.5 mm (2.4 in)
1973	56.4 mm (2.2 in)
1974	71.4 mm (2.8 in)
1975	64.8 mm (2.6 in)
1976	64.8 mm (2.6 in)
1977	44.7 mm (1.8 in)
1978	57.2 mm (2.3 in)
1979	144.8 mm (5.7 in)
1980	38.9 mm (1.5 in)
1981	41.7 mm (1.6 in)
1982	85.1 mm (3.4 in)
1983	101.6 mm (4.0 in)
1984	71.1 mm (2.8 in)
1985	50.3 mm (2.0 in)
1986	77.5 mm (3.1 in)
1987	42.9 mm (1.7 in)
1988	56.6 mm (2.2 in)
1989	56.6 mm (2.2 in)
1990	65.8 mm (2.6 in)
1991	100.6 mm (4.0 in)
1992	73.9 mm (2.9 in)
1993	68.1 mm (2.7 in)
1994	32.8 mm (1.3 in)
1995	57.2 mm (2.3 in)
1996	75.7 mm (3.0 in)
1997	91.4 mm (3.6 in)
1998	71.4 mm (2.8 in)
1999	54.6 mm (2.1 in)
2000	75.7 mm (3.0 in)
2001	75.2 mm (3.0 in)
2002	86.9 mm (3.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Carrollton Lock 1, 1893 to 2002. The record is 235.9 mm (9.3 in) in 1937, marked on the chart; the median year is 96.8 mm (3.8 in).

Wettest five days (Rx5day) at Carrollton Lock 1 by year
Year	Wettest five days (Rx5day)
1893	127.1 mm (5.0 in)
1894	55.8 mm (2.2 in)
1895	87.6 mm (3.4 in)
1896	90.4 mm (3.6 in)
1897	134.3 mm (5.3 in)
1898	116.4 mm (4.6 in)
1899	63.5 mm (2.5 in)
1900	105.2 mm (4.1 in)
1901	58.4 mm (2.3 in)
1902	87.1 mm (3.4 in)
1903	69.1 mm (2.7 in)
1917	140.5 mm (5.5 in)
1918	87.7 mm (3.5 in)
1919	84.9 mm (3.3 in)
1920	156.9 mm (6.2 in)
1921	160.3 mm (6.3 in)
1922	83.0 mm (3.3 in)
1923	74.7 mm (2.9 in)
1924	101.9 mm (4.0 in)
1925	90.9 mm (3.6 in)
1926	81.7 mm (3.2 in)
1927	136.7 mm (5.4 in)
1928	96.4 mm (3.8 in)
1929	102.1 mm (4.0 in)
1930	79.3 mm (3.1 in)
1931	56.1 mm (2.2 in)
1932	175.0 mm (6.9 in)
1933	139.5 mm (5.5 in)
1934	61.7 mm (2.4 in)
1935	96.8 mm (3.8 in)
1936	106.7 mm (4.2 in)
1937	235.9 mm (9.3 in)
1938	107.7 mm (4.2 in)
1939	95.5 mm (3.8 in)
1940	77.5 mm (3.1 in)
1941	91.0 mm (3.6 in)
1942	78.9 mm (3.1 in)
1943	133.4 mm (5.3 in)
1944	66.1 mm (2.6 in)
1945	117.9 mm (4.6 in)
1946	92.7 mm (3.6 in)
1947	233.9 mm (9.2 in)
1948	136.4 mm (5.4 in)
1949	114.3 mm (4.5 in)
1950	108.2 mm (4.3 in)
1951	69.2 mm (2.7 in)
1952	64.5 mm (2.5 in)
1953	55.2 mm (2.2 in)
1954	85.6 mm (3.4 in)
1955	116.8 mm (4.6 in)
1956	94.7 mm (3.7 in)
1957	101.6 mm (4.0 in)
1958	92.7 mm (3.6 in)
1959	78.5 mm (3.1 in)
1960	180.1 mm (7.1 in)
1961	154.8 mm (6.1 in)
1962	110.7 mm (4.4 in)
1963	86.3 mm (3.4 in)
1964	162.8 mm (6.4 in)
1965	87.9 mm (3.5 in)
1966	97.0 mm (3.8 in)
1967	59.2 mm (2.3 in)
1968	80.8 mm (3.2 in)
1969	108.7 mm (4.3 in)
1970	101.4 mm (4.0 in)
1971	93.0 mm (3.7 in)
1972	77.9 mm (3.1 in)
1973	107.0 mm (4.2 in)
1974	95.0 mm (3.7 in)
1975	104.9 mm (4.1 in)
1976	83.5 mm (3.3 in)
1977	99.8 mm (3.9 in)
1978	80.5 mm (3.2 in)
1979	144.8 mm (5.7 in)
1980	58.4 mm (2.3 in)
1981	72.1 mm (2.8 in)
1982	113.8 mm (4.5 in)
1983	183.1 mm (7.2 in)
1984	92.0 mm (3.6 in)
1985	91.2 mm (3.6 in)
1986	173.1 mm (6.8 in)
1987	55.7 mm (2.2 in)
1988	91.0 mm (3.6 in)
1989	106.9 mm (4.2 in)
1990	126.1 mm (5.0 in)
1991	101.2 mm (4.0 in)
1992	79.3 mm (3.1 in)
1993	118.9 mm (4.7 in)
1994	42.7 mm (1.7 in)
1995	130.0 mm (5.1 in)
1996	121.7 mm (4.8 in)
1997	179.8 mm (7.1 in)
1998	105.2 mm (4.1 in)
1999	106.1 mm (4.2 in)
2000	122.0 mm (4.8 in)
2001	108.8 mm (4.3 in)
2002	86.9 mm (3.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Carrollton Lock 1, 1893 to 2002. The record is 44 days in 1901, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Carrollton Lock 1 by year
Year	Longest dry spell (CDD)
1893	19 days
1894	33 days
1895	26 days
1896	22 days
1897	39 days
1898	25 days
1899	28 days
1900	16 days
1901	44 days
1902	26 days
1903	15 days
1917	29 days
1918	18 days
1919	19 days
1920	20 days
1921	24 days
1922	20 days
1923	27 days
1924	30 days
1925	18 days
1926	13 days
1927	18 days
1928	26 days
1929	19 days
1930	22 days
1931	18 days
1932	16 days
1933	30 days
1934	42 days
1935	19 days
1936	27 days
1937	22 days
1938	32 days
1939	25 days
1940	21 days
1941	20 days
1942	14 days
1943	33 days
1944	31 days
1945	20 days
1946	17 days
1947	34 days
1948	19 days
1949	13 days
1950	12 days
1951	16 days
1952	30 days
1953	27 days
1954	13 days
1955	13 days
1956	16 days
1957	23 days
1958	25 days
1959	24 days
1960	18 days
1961	27 days
1962	28 days
1963	27 days
1964	19 days
1965	16 days
1966	17 days
1967	20 days
1968	17 days
1969	16 days
1970	14 days
1971	13 days
1972	15 days
1973	24 days
1974	14 days
1975	18 days
1976	25 days
1977	17 days
1978	15 days
1979	14 days
1980	15 days
1981	13 days
1982	20 days
1983	22 days
1984	19 days
1985	23 days
1986	18 days
1987	14 days
1988	32 days
1989	11 days
1990	11 days
1991	16 days
1992	19 days
1993	18 days
1994	18 days
1995	30 days
1996	10 days
1997	32 days
1998	20 days
1999	34 days
2000	17 days
2001	15 days
2002	19 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

52 years with a frost

Across 52 years with a frost, the median last spring frost at Carrollton Lock 1 falls on 20 April and the median first autumn frost on 20 October, which leaves a median of 185 days between them.

Fitted over all years, the growing season changes by -2.0 days per decade at this station.

Frost dates and growing season at Carrollton Lock 1
Measure	Median, all years	Earliest period	Recent period (1967 to 1999)	Recent against earliest	Fitted trend
Last spring frost	20 April	n/a	18 April	n/a	+0.6 days per decade
First autumn frost	20 October	n/a	19 October	n/a	-1.4 days per decade
Growing days	185 days	n/a	185 days	n/a	-2.0 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

89 years, 1893 to 2000

A day with at least 63.0 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 163.3 mm (6.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Carrollton Lock 1: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	63.0 mm (2.5 in)
5 years	83.8 mm (3.3 in)
10 years	99.8 mm (3.9 in)
25 years	122.7 mm (4.8 in)
50 years	142.0 mm (5.6 in)
100 years	163.3 mm (6.4 in)	Longer than the 89 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, 89 years of values from 1893 to 2000.

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: 210.8 mm (8.3 in) in 1947; 144.8 mm (5.7 in) in 1979; 131.1 mm (5.2 in) in 1921.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Carrollton Lock 1 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Carrollton Lock 1 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 2026-10-15 (15 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).