Hennessey 4 ESE Weather Records (USC00344055)

Record envelope, standing records and threshold days for Hennessey 4 ESE (USC00344055), Oklahoma, United States, with 118 years of record.

Key Facts for Hennessey 4 ESE

Hennessey 4 ESE (USC00344055) is a weather station in Oklahoma, United States at 36.09 latitude and -97.83 longitude, 358 m (1,174 ft) above sea level.
The station reports from 1895 to 2012, 118 years of record.
1,464 records set at Hennessey 4 ESE still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Hennessey 4 ESE set a daily record high minimum temperature of 17.8 C (64.0 F) on 18 March 2012.

About the Station

Location: Oklahoma, United States, 36.09 latitude, -97.83 longitude.
Elevation: 358 m (1,174 ft).
Period of record: 1895 to 2012, 118 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 Hennessey 4 ESE. 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 Hennessey 4 ESE, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	27.2 C (81.0 F)	-26.1 C (-15.0 F)	n/a	n/a
Feb	31.1 C (88.0 F)	-28.9 C (-20.0 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-18.3 C (-0.9 F)	n/a	n/a
Apr	38.9 C (102.0 F)	-8.9 C (16.0 F)	n/a	n/a
May	40.0 C (104.0 F)	-0.6 C (30.9 F)	n/a	n/a
Jun	44.4 C (111.9 F)	7.2 C (45.0 F)	n/a	n/a
Jul	45.6 C (114.1 F)	10.6 C (51.1 F)	n/a	n/a
Aug	46.7 C (116.1 F)	7.2 C (45.0 F)	n/a	n/a
Sep	43.3 C (109.9 F)	0.0 C (32.0 F)	n/a	n/a
Oct	37.2 C (99.0 F)	-10.0 C (14.0 F)	n/a	n/a
Nov	31.7 C (89.1 F)	-13.3 C (8.1 F)	n/a	n/a
Dec	29.4 C (84.9 F)	-25.0 C (-13.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Hennessey 4 ESE still stand. 1936 holds the most, with 42.

Standing records at Hennessey 4 ESE by the year they were set
Year set	Standing records
1895	26
1896	28
1897	20
1898	32
1899	31
1915	16
1916	8
1917	23
1918	18
1919	8
1920	10
1921	14
1922	19
1923	11
1924	18
1925	22
1926	14
1927	12
1928	14
1929	11
1930	20
1931	15
1932	14
1933	17
1934	24
1935	11
1936	42
1937	14
1938	14
1939	19
1940	17
1941	5
1942	7
1943	19
1944	8
1945	16
1946	17
1947	24
1948	12
1949	5
1950	24
1951	23
1952	20
1953	31
1954	23
1955	19
1956	22
1957	5
1958	9
1959	9
1960	19
1961	10
1962	14
1963	11
1964	15
1965	12
1966	17
1967	19
1968	11
1969	3
1970	14
1971	7
1972	15
1973	8
1974	13
1975	4
1976	11
1977	6
1978	10
1979	11
1980	9
1981	10
1982	7
1983	24
1984	8
1985	5
1986	15
1987	5
1988	9
1989	16
1990	10
1991	12
1992	12
1993	9
1994	12
1995	15
1996	15
1997	10
1998	10
1999	8
2000	16
2001	7
2002	13
2003	12
2004	15
2005	7
2006	16
2007	7
2008	9
2009	11
2010	5
2011	31
2012	4

All-Time Record Progression

4 new records

4 all-time records were set at Hennessey 4 ESE between 15 May 1957 and 11 February 2011. Each dot is a new record.

When Hennessey 4 ESE set new all-time records
Date	Kind	Detail
1957-05-15	Record daily precipitation	Record daily precipitation 248.4 mm (9.8 in)
1983-12-22	Record low maximum temperature	Record low maximum temperature -15.0 C (5.0 F)
1988-01-07	Record daily snowfall	Record daily snowfall 27.9 cm (11.0 in)
2011-02-11	Record low minimum temperature	Record low minimum temperature -28.9 C (-20.0 F)

Wettest Day of Each Month

May: 248.4 mm (9.8 in)

The wettest day on record for each calendar month at Hennessey 4 ESE. The most was 248.4 mm (9.8 in) on 15 May 1957.

Record daily precipitation for each month at Hennessey 4 ESE
Month	Record daily precipitation (mm)	Date
Jan	53.1 mm (2.1 in)	10 January 1949
Feb	74.9 mm (2.9 in)	9 February 1898
Mar	131.3 mm (5.2 in)	5 March 2004
Apr	75.7 mm (3.0 in)	19 April 1942
May	248.4 mm (9.8 in)	15 May 1957
Jun	115.6 mm (4.6 in)	21 June 1948
Jul	100.6 mm (4.0 in)	7 July 1982
Aug	127.0 mm (5.0 in)	17 August 1932
Sep	162.8 mm (6.4 in)	13 September 1961
Oct	125.7 mm (4.9 in)	3 October 1986
Nov	104.6 mm (4.1 in)	20 November 1994
Dec	76.2 mm (3.0 in)	18 December 1898

Period of Record Coverage

1895 to 2012

103 years of record at Hennessey 4 ESE, 1895 to 2012. 16 years have data for under 90 percent of days and are left out of rankings: 1895, 1896, 1897, 1898, 1899, 1915, 1916, 1917 and others.

Days with data per year at Hennessey 4 ESE
Year	Days with data	Share of year	Complete
1895	216	59%	No
1896	272	74%	No
1897	320	88%	No
1898	317	87%	No
1899	317	87%	No
1915	259	71%	No
1916	254	69%	No
1917	265	73%	No
1918	267	73%	No
1919	248	68%	No
1920	346	95%	Yes
1921	359	98%	Yes
1922	357	98%	Yes
1923	361	99%	Yes
1924	348	95%	Yes
1925	354	97%	Yes
1926	351	96%	Yes
1927	356	98%	Yes
1928	363	99%	Yes
1929	362	99%	Yes
1930	363	99%	Yes
1931	364	100%	Yes
1932	366	100%	Yes
1933	364	100%	Yes
1934	364	100%	Yes
1935	357	98%	Yes
1936	366	100%	Yes
1937	364	100%	Yes
1938	365	100%	Yes
1939	365	100%	Yes
1940	365	100%	Yes
1941	364	100%	Yes
1942	365	100%	Yes
1943	363	99%	Yes
1944	366	100%	Yes
1945	364	100%	Yes
1946	364	100%	Yes
1947	365	100%	Yes
1948	356	97%	Yes
1949	356	98%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	363	99%	Yes
1954	341	93%	Yes
1955	364	100%	Yes
1956	364	99%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	351	96%	Yes
1967	365	100%	Yes
1968	327	89%	No
1969	353	97%	Yes
1970	356	98%	Yes
1971	313	86%	No
1972	348	95%	Yes
1973	333	91%	Yes
1974	359	98%	Yes
1975	351	96%	Yes
1976	331	90%	Yes
1977	325	89%	No
1978	330	90%	Yes
1979	336	92%	Yes
1980	322	88%	No
1981	327	90%	No
1982	346	95%	Yes
1983	357	98%	Yes
1984	363	99%	Yes
1985	334	92%	Yes
1986	364	100%	Yes
1987	358	98%	Yes
1988	366	100%	Yes
1989	363	99%	Yes
1990	331	91%	Yes
1991	363	99%	Yes
1992	356	97%	Yes
1993	348	95%	Yes
1994	359	98%	Yes
1995	356	98%	Yes
1996	354	97%	Yes
1997	354	97%	Yes
1998	353	97%	Yes
1999	350	96%	Yes
2000	349	95%	Yes
2001	355	97%	Yes
2002	346	95%	Yes
2003	364	100%	Yes
2004	359	98%	Yes
2005	363	99%	Yes
2006	364	100%	Yes
2007	364	100%	Yes
2008	365	100%	Yes
2009	364	100%	Yes
2010	361	99%	Yes
2011	364	100%	Yes
2012	91	25%	No

Latest Records

Latest records at Hennessey 4 ESE
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
18 March 2012	Hennessey 4 ESE, US	daily high min	17.8 C (64.0 F)	1.7 C (3.1 F)	30 years	21 of 100 (Routine)
17 March 2012	Hennessey 4 ESE, US	daily high min	16.1 C (61.0 F)	2.2 C (4.0 F)	90 years	40 of 100 (Notable)
16 March 2012	Hennessey 4 ESE, US	daily high min	16.1 C (61.0 F)	1.7 C (3.1 F)	67 years	32 of 100 (Routine)
15 March 2012	Hennessey 4 ESE, US	daily high min	17.8 C (64.0 F)	3.4 C (6.1 F)	29 years	23 of 100 (Routine)
29 February 2012	Hennessey 4 ESE, US	daily rain	0.8 mm (0.03 in)	0.8 mm (0.03 in)	115 years	20 of 100 (Routine)
3 February 2012	Hennessey 4 ESE, US	daily rain	15.2 mm (0.6 in)	5.0 mm (0.20 in)	56 years	20 of 100 (Routine)
25 January 2012	Hennessey 4 ESE, US	daily rain	22.9 mm (0.9 in)	2.6 mm (0.10 in)	113 years	20 of 100 (Routine)
6 January 2012	Hennessey 4 ESE, US	daily high max (Tie)	18.9 C (66.0 F)	tie	4 years	2 of 100 (Routine)
20 December 2011	Hennessey 4 ESE, US	daily high min	7.2 C (45.0 F)	1.1 C (2.0 F)	44 years	25 of 100 (Routine)
7 December 2011	Hennessey 4 ESE, US	daily low max	-2.2 C (28.0 F)	0.5 C (0.9 F)	93 years	38 of 100 (Notable)
8 November 2011	Hennessey 4 ESE, US	daily rain	55.9 mm (2.2 in)	42.7 mm (1.7 in)	33 years	52 of 100 (Notable)
5 November 2011	Hennessey 4 ESE, US	daily low min	-5.0 C (23.0 F)	0.6 C (1.1 F)	60 years	29 of 100 (Routine)
8 October 2011	Hennessey 4 ESE, US	daily high min (Tie)	21.7 C (71.1 F)	tie	61 years	7 of 100 (Routine)
17 September 2011	Hennessey 4 ESE, US	daily low max (Tie)	16.7 C (62.1 F)	tie	74 years	8 of 100 (Routine)
16 September 2011	Hennessey 4 ESE, US	daily low max	14.4 C (57.9 F)	3.9 C (7.0 F)	44 years	30 of 100 (Routine)
30 August 2011	Hennessey 4 ESE, US	daily high min	27.2 C (81.0 F)	2.2 C (4.0 F)	30 years	26 of 100 (Routine)
28 August 2011	Hennessey 4 ESE, US	daily high max	43.9 C (111.0 F)	2.2 C (4.0 F)	60 years	33 of 100 (Routine)
22 August 2011	Hennessey 4 ESE, US	daily high min	26.1 C (79.0 F)	1.1 C (2.0 F)	25 years	20 of 100 (Routine)
12 August 2011	Hennessey 4 ESE, US	daily rain	35.8 mm (1.4 in)	5.8 mm (0.23 in)	8 years	15 of 100 (Routine)
4 August 2011	Hennessey 4 ESE, US	daily high max	45.0 C (113.0 F)	0.6 C (1.1 F)	46 years	25 of 100 (Routine)

Climate Trend

75 complete years, 1921 to 2011

One stripe for each of 75 complete years at Hennessey 4 ESE, 1921 to 2011. Blue stripes are years cooler than the station's own mean of 15.6 C (60.1 F); red stripes are warmer. The coolest year was 2009, at 14.3 C (57.7 F), and the warmest was 1946, at 17.2 C (62.9 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Hennessey 4 ESE as warming stripes, 1921 to 2011
Year	Annual mean temperature	Difference from the station mean
1921	16.8 C	+1.19 C
1922	15.8 C	+0.20 C
1923	15.9 C	+0.27 C
1924	15.2 C	-0.47 C
1925	16.2 C	+0.60 C
1926	16.0 C	+0.37 C
1927	16.0 C	+0.37 C
1929	15.0 C	-0.58 C
1930	16.0 C	+0.34 C
1931	16.5 C	+0.84 C
1932	15.3 C	-0.37 C
1933	16.7 C	+1.10 C
1934	16.7 C	+1.04 C
1935	15.8 C	+0.14 C
1936	16.2 C	+0.61 C
1937	15.4 C	-0.22 C
1938	16.5 C	+0.86 C
1939	16.9 C	+1.24 C
1940	14.8 C	-0.82 C
1941	15.3 C	-0.28 C
1942	15.6 C	+0.00 C
1943	16.6 C	+1.01 C
1944	16.3 C	+0.66 C
1945	15.7 C	+0.08 C
1946	17.2 C	+1.55 C
1947	16.3 C	+0.72 C
1948	16.2 C	+0.53 C
1949	16.2 C	+0.61 C
1950	16.2 C	+0.55 C
1951	15.6 C	-0.05 C
1952	16.2 C	+0.59 C
1955	16.0 C	+0.38 C
1956	16.9 C	+1.30 C
1957	15.1 C	-0.49 C
1958	15.2 C	-0.41 C
1959	15.3 C	-0.28 C
1960	14.5 C	-1.08 C
1961	14.9 C	-0.71 C
1962	15.7 C	+0.12 C
1963	16.3 C	+0.69 C
1964	15.8 C	+0.20 C
1965	16.2 C	+0.54 C
1967	15.5 C	-0.14 C
1969	15.5 C	-0.11 C
1970	15.7 C	+0.12 C
1974	15.7 C	+0.10 C
1975	15.2 C	-0.38 C
1977	16.4 C	+0.77 C
1979	14.4 C	-1.18 C
1983	14.5 C	-1.15 C
1984	15.2 C	-0.41 C
1986	16.2 C	+0.59 C
1987	15.4 C	-0.20 C
1988	15.1 C	-0.54 C
1989	14.4 C	-1.27 C
1991	16.0 C	+0.37 C
1992	15.3 C	-0.35 C
1993	14.6 C	-1.06 C
1994	15.3 C	-0.31 C
1995	15.0 C	-0.64 C
1996	14.9 C	-0.73 C
1997	14.9 C	-0.77 C
1998	16.6 C	+0.96 C
1999	15.8 C	+0.16 C
2000	15.3 C	-0.33 C
2001	15.5 C	-0.16 C
2003	14.4 C	-1.19 C
2004	14.7 C	-0.94 C
2005	15.2 C	-0.42 C
2006	16.0 C	+0.41 C
2007	14.6 C	-1.02 C
2008	14.4 C	-1.26 C
2009	14.3 C	-1.32 C
2010	14.9 C	-0.76 C
2011	15.7 C	+0.09 C

The annual mean temperature here has fallen by 0.1 C (0.1 to 0.2) per decade over 1921 to 2011. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 75 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Hennessey 4 ESE
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	-0.1 C (-0.2 to -0.1) per decade	-0.2 F (-0.3 to -0.1) per decade	1921 to 2011	75	Fall
Mean daily maximum	-0.2 C (-0.3 to -0.1) per decade	-0.3 F (-0.5 to -0.2) per decade	1921 to 2011	75	Fall
Mean daily minimum	-0.08 C (-0.13 to -0.03) per decade	-0.1 F (-0.2 to -0.1) per decade	1921 to 2011	75	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

1895 to 2012

Yearly extremes at Hennessey 4 ESE: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.7 C (116.1 F)	1922	41.7 C (107.1 F)	103
Coldest night (TNn)	-28.9 C (-20.0 F)	2011	-16.1 C (3.0 F)	103
Wettest day (Rx1day)	248.4 mm (9.8 in)	1957	63.5 mm (2.5 in)	103
Wettest five days (Rx5day)	355.1 mm (14.0 in)	1986	94.5 mm (3.7 in)	103
Longest dry spell (CDD)	76 days	2000	35 days	103

Hottest day (TXx)

The hottest day of the year at Hennessey 4 ESE, 1895 to 2012. The record is 46.7 C (116.1 F) in 1922, marked on the chart; the median year is 41.7 C (107.1 F).

Hottest day (TXx) at Hennessey 4 ESE by year
Year	Hottest day (TXx)
1895	39.4 C (102.9 F)
1896	40.0 C (104.0 F)
1897	42.2 C (108.0 F)
1898	36.7 C (98.1 F)
1899	42.2 C (108.0 F)
1915	37.8 C (100.0 F)
1916	41.1 C (106.0 F)
1917	41.7 C (107.1 F)
1918	41.1 C (106.0 F)
1919	40.0 C (104.0 F)
1920	40.6 C (105.1 F)
1921	42.2 C (108.0 F)
1922	46.7 C (116.1 F)
1923	43.9 C (111.0 F)
1924	43.3 C (109.9 F)
1925	42.2 C (108.0 F)
1926	41.1 C (106.0 F)
1927	40.0 C (104.0 F)
1928	40.0 C (104.0 F)
1929	43.3 C (109.9 F)
1930	43.9 C (111.0 F)
1931	41.7 C (107.1 F)
1932	38.9 C (102.0 F)
1933	42.8 C (109.0 F)
1934	43.3 C (109.9 F)
1935	43.3 C (109.9 F)
1936	46.7 C (116.1 F)
1937	44.4 C (111.9 F)
1938	39.4 C (102.9 F)
1939	43.3 C (109.9 F)
1940	39.4 C (102.9 F)
1941	41.1 C (106.0 F)
1942	39.4 C (102.9 F)
1943	43.3 C (109.9 F)
1944	41.7 C (107.1 F)
1945	42.2 C (108.0 F)
1946	43.9 C (111.0 F)
1947	43.3 C (109.9 F)
1948	40.6 C (105.1 F)
1949	41.7 C (107.1 F)
1950	40.0 C (104.0 F)
1951	43.9 C (111.0 F)
1952	42.8 C (109.0 F)
1953	44.4 C (111.9 F)
1954	45.6 C (114.1 F)
1955	40.6 C (105.1 F)
1956	45.0 C (113.0 F)
1957	41.7 C (107.1 F)
1958	42.8 C (109.0 F)
1959	42.2 C (108.0 F)
1960	40.0 C (104.0 F)
1961	40.0 C (104.0 F)
1962	41.7 C (107.1 F)
1963	42.2 C (108.0 F)
1964	45.6 C (114.1 F)
1965	42.8 C (109.0 F)
1966	43.3 C (109.9 F)
1967	41.7 C (107.1 F)
1968	42.2 C (108.0 F)
1969	43.9 C (111.0 F)
1970	43.9 C (111.0 F)
1971	44.4 C (111.9 F)
1972	39.4 C (102.9 F)
1973	40.6 C (105.1 F)
1974	42.8 C (109.0 F)
1975	37.8 C (100.0 F)
1976	41.1 C (106.0 F)
1977	39.4 C (102.9 F)
1978	42.2 C (108.0 F)
1979	38.9 C (102.0 F)
1980	42.8 C (109.0 F)
1981	42.8 C (109.0 F)
1982	41.1 C (106.0 F)
1983	41.7 C (107.1 F)
1984	42.8 C (109.0 F)
1985	41.1 C (106.0 F)
1986	44.4 C (111.9 F)
1987	39.4 C (102.9 F)
1988	40.6 C (105.1 F)
1989	38.3 C (100.9 F)
1990	41.1 C (106.0 F)
1991	40.6 C (105.1 F)
1992	37.8 C (100.0 F)
1993	41.7 C (107.1 F)
1994	42.2 C (108.0 F)
1995	42.2 C (108.0 F)
1996	44.4 C (111.9 F)
1997	38.3 C (100.9 F)
1998	42.8 C (109.0 F)
1999	40.6 C (105.1 F)
2000	42.8 C (109.0 F)
2001	42.8 C (109.0 F)
2002	38.9 C (102.0 F)
2003	42.8 C (109.0 F)
2004	39.4 C (102.9 F)
2005	39.4 C (102.9 F)
2006	41.7 C (107.1 F)
2007	40.0 C (104.0 F)
2008	41.1 C (106.0 F)
2009	43.3 C (109.9 F)
2010	41.7 C (107.1 F)
2011	45.6 C (114.1 F)
2012	28.3 C (82.9 F)

Coldest night (TNn)

The coldest night of the year at Hennessey 4 ESE, 1895 to 2012. The record is -28.9 C (-20.0 F) in 2011, marked on the chart; the median year is -16.1 C (3.0 F).

Coldest night (TNn) at Hennessey 4 ESE by year
Year	Coldest night (TNn)
1895	-13.3 C (8.1 F)
1896	-13.3 C (8.1 F)
1897	-12.2 C (10.0 F)
1898	-15.6 C (3.9 F)
1899	-27.2 C (-17.0 F)
1915	-11.1 C (12.0 F)
1916	-20.6 C (-5.1 F)
1917	-17.8 C (0.0 F)
1918	-22.2 C (-8.0 F)
1919	-16.1 C (3.0 F)
1920	-15.0 C (5.0 F)
1921	-13.3 C (8.1 F)
1922	-12.8 C (9.0 F)
1923	-14.4 C (6.1 F)
1924	-17.2 C (1.0 F)
1925	-15.6 C (3.9 F)
1926	-15.0 C (5.0 F)
1927	-16.1 C (3.0 F)
1928	-17.8 C (0.0 F)
1929	-21.1 C (-6.0 F)
1930	-26.1 C (-15.0 F)
1931	-10.0 C (14.0 F)
1932	-18.3 C (-0.9 F)
1933	-23.3 C (-9.9 F)
1934	-13.9 C (7.0 F)
1935	-20.0 C (-4.0 F)
1936	-20.0 C (-4.0 F)
1937	-15.6 C (3.9 F)
1938	-15.0 C (5.0 F)
1939	-15.0 C (5.0 F)
1940	-20.0 C (-4.0 F)
1941	-7.8 C (18.0 F)
1942	-20.0 C (-4.0 F)
1943	-21.1 C (-6.0 F)
1944	-15.0 C (5.0 F)
1945	-16.1 C (3.0 F)
1946	-15.0 C (5.0 F)
1947	-24.4 C (-11.9 F)
1948	-16.1 C (3.0 F)
1949	-17.8 C (0.0 F)
1950	-17.2 C (1.0 F)
1951	-20.6 C (-5.1 F)
1952	-11.1 C (12.0 F)
1953	-14.4 C (6.1 F)
1954	-20.6 C (-5.1 F)
1955	-12.8 C (9.0 F)
1956	-14.4 C (6.1 F)
1957	-12.8 C (9.0 F)
1958	-18.9 C (-2.0 F)
1959	-23.3 C (-9.9 F)
1960	-18.3 C (-0.9 F)
1961	-15.6 C (3.9 F)
1962	-18.3 C (-0.9 F)
1963	-20.6 C (-5.1 F)
1964	-16.7 C (1.9 F)
1965	-13.9 C (7.0 F)
1966	-18.3 C (-0.9 F)
1967	-15.6 C (3.9 F)
1968	-20.0 C (-4.0 F)
1969	-12.8 C (9.0 F)
1970	-15.6 C (3.9 F)
1971	-12.8 C (9.0 F)
1972	-17.2 C (1.0 F)
1973	-18.3 C (-0.9 F)
1974	-15.6 C (3.9 F)
1975	-13.3 C (8.1 F)
1976	-16.1 C (3.0 F)
1977	-17.2 C (1.0 F)
1978	-19.4 C (-2.9 F)
1979	-20.0 C (-4.0 F)
1980	-13.9 C (7.0 F)
1981	-18.3 C (-0.9 F)
1982	-19.4 C (-2.9 F)
1983	-19.4 C (-2.9 F)
1984	-22.8 C (-9.0 F)
1985	-16.1 C (3.0 F)
1986	-16.1 C (3.0 F)
1987	-17.8 C (0.0 F)
1988	-25.0 C (-13.0 F)
1989	-25.0 C (-13.0 F)
1990	-18.3 C (-0.9 F)
1991	-13.3 C (8.1 F)
1992	-10.6 C (12.9 F)
1993	-15.0 C (5.0 F)
1994	-13.9 C (7.0 F)
1995	-12.8 C (9.0 F)
1996	-24.4 C (-11.9 F)
1997	-16.1 C (3.0 F)
1998	-14.4 C (6.1 F)
1999	-13.3 C (8.1 F)
2000	-17.2 C (1.0 F)
2001	-13.3 C (8.1 F)
2002	-16.1 C (3.0 F)
2003	-19.4 C (-2.9 F)
2004	-15.6 C (3.9 F)
2005	-17.2 C (1.0 F)
2006	-13.9 C (7.0 F)
2007	-15.0 C (5.0 F)
2008	-14.4 C (6.1 F)
2009	-15.6 C (3.9 F)
2010	-16.7 C (1.9 F)
2011	-28.9 C (-20.0 F)
2012	-8.9 C (16.0 F)

Wettest day (Rx1day)

The wettest day of the year at Hennessey 4 ESE, 1895 to 2012. The record is 248.4 mm (9.8 in) in 1957, marked on the chart; the median year is 63.5 mm (2.5 in).

Wettest day (Rx1day) at Hennessey 4 ESE by year
Year	Wettest day (Rx1day)
1895	45.2 mm (1.8 in)
1896	39.4 mm (1.6 in)
1897	101.6 mm (4.0 in)
1898	83.8 mm (3.3 in)
1899	71.1 mm (2.8 in)
1915	43.2 mm (1.7 in)
1916	36.8 mm (1.4 in)
1917	50.8 mm (2.0 in)
1918	50.8 mm (2.0 in)
1919	63.5 mm (2.5 in)
1920	50.8 mm (2.0 in)
1921	33.0 mm (1.3 in)
1922	61.7 mm (2.4 in)
1923	43.2 mm (1.7 in)
1924	36.8 mm (1.4 in)
1925	61.5 mm (2.4 in)
1926	59.2 mm (2.3 in)
1927	45.7 mm (1.8 in)
1928	72.1 mm (2.8 in)
1929	69.9 mm (2.8 in)
1930	50.8 mm (2.0 in)
1931	66.5 mm (2.6 in)
1932	127.0 mm (5.0 in)
1933	66.8 mm (2.6 in)
1934	38.4 mm (1.5 in)
1935	63.5 mm (2.5 in)
1936	69.1 mm (2.7 in)
1937	50.5 mm (2.0 in)
1938	54.4 mm (2.1 in)
1939	50.3 mm (2.0 in)
1940	52.6 mm (2.1 in)
1941	100.3 mm (3.9 in)
1942	75.7 mm (3.0 in)
1943	66.8 mm (2.6 in)
1944	75.2 mm (3.0 in)
1945	69.3 mm (2.7 in)
1946	55.1 mm (2.2 in)
1947	50.5 mm (2.0 in)
1948	115.6 mm (4.6 in)
1949	68.1 mm (2.7 in)
1950	60.5 mm (2.4 in)
1951	65.3 mm (2.6 in)
1952	35.6 mm (1.4 in)
1953	52.6 mm (2.1 in)
1954	35.6 mm (1.4 in)
1955	104.1 mm (4.1 in)
1956	46.0 mm (1.8 in)
1957	248.4 mm (9.8 in)
1958	54.6 mm (2.1 in)
1959	56.6 mm (2.2 in)
1960	77.5 mm (3.1 in)
1961	162.8 mm (6.4 in)
1962	48.8 mm (1.9 in)
1963	75.7 mm (3.0 in)
1964	68.1 mm (2.7 in)
1965	59.2 mm (2.3 in)
1966	60.7 mm (2.4 in)
1967	62.2 mm (2.4 in)
1968	74.4 mm (2.9 in)
1969	50.0 mm (2.0 in)
1970	68.6 mm (2.7 in)
1971	71.9 mm (2.8 in)
1972	56.1 mm (2.2 in)
1973	54.6 mm (2.1 in)
1974	94.0 mm (3.7 in)
1975	74.2 mm (2.9 in)
1976	49.0 mm (1.9 in)
1977	61.0 mm (2.4 in)
1978	42.4 mm (1.7 in)
1979	71.1 mm (2.8 in)
1980	88.9 mm (3.5 in)
1981	48.3 mm (1.9 in)
1982	113.5 mm (4.5 in)
1983	127.8 mm (5.0 in)
1984	45.7 mm (1.8 in)
1985	55.4 mm (2.2 in)
1986	125.7 mm (4.9 in)
1987	57.2 mm (2.3 in)
1988	91.2 mm (3.6 in)
1989	85.9 mm (3.4 in)
1990	45.0 mm (1.8 in)
1991	43.2 mm (1.7 in)
1992	49.0 mm (1.9 in)
1993	141.0 mm (5.6 in)
1994	104.6 mm (4.1 in)
1995	92.7 mm (3.6 in)
1996	56.4 mm (2.2 in)
1997	74.4 mm (2.9 in)
1998	95.5 mm (3.8 in)
1999	64.3 mm (2.5 in)
2000	53.3 mm (2.1 in)
2001	121.9 mm (4.8 in)
2002	81.3 mm (3.2 in)
2003	80.0 mm (3.1 in)
2004	131.3 mm (5.2 in)
2005	76.5 mm (3.0 in)
2006	70.1 mm (2.8 in)
2007	81.8 mm (3.2 in)
2008	102.9 mm (4.1 in)
2009	67.8 mm (2.7 in)
2010	53.8 mm (2.1 in)
2011	64.8 mm (2.6 in)
2012	30.5 mm (1.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Hennessey 4 ESE, 1895 to 2012. The record is 355.1 mm (14.0 in) in 1986, marked on the chart; the median year is 94.5 mm (3.7 in).

Wettest five days (Rx5day) at Hennessey 4 ESE by year
Year	Wettest five days (Rx5day)
1895	87.3 mm (3.4 in)
1896	39.4 mm (1.6 in)
1897	128.7 mm (5.1 in)
1898	143.5 mm (5.6 in)
1899	121.4 mm (4.8 in)
1915	86.1 mm (3.4 in)
1916	60.9 mm (2.4 in)
1917	64.5 mm (2.5 in)
1918	72.4 mm (2.9 in)
1919	118.1 mm (4.6 in)
1920	91.5 mm (3.6 in)
1921	72.1 mm (2.8 in)
1922	89.4 mm (3.5 in)
1923	106.7 mm (4.2 in)
1924	62.0 mm (2.4 in)
1925	76.2 mm (3.0 in)
1926	117.1 mm (4.6 in)
1927	145.5 mm (5.7 in)
1928	77.7 mm (3.1 in)
1929	87.7 mm (3.5 in)
1930	76.2 mm (3.0 in)
1931	109.2 mm (4.3 in)
1932	154.7 mm (6.1 in)
1933	87.2 mm (3.4 in)
1934	72.4 mm (2.9 in)
1935	100.3 mm (3.9 in)
1936	74.7 mm (2.9 in)
1937	76.8 mm (3.0 in)
1938	119.6 mm (4.7 in)
1939	82.1 mm (3.2 in)
1940	100.1 mm (3.9 in)
1941	132.1 mm (5.2 in)
1942	87.3 mm (3.4 in)
1943	124.0 mm (4.9 in)
1944	116.4 mm (4.6 in)
1945	100.5 mm (4.0 in)
1946	65.5 mm (2.6 in)
1947	123.3 mm (4.9 in)
1948	166.2 mm (6.5 in)
1949	125.5 mm (4.9 in)
1950	125.7 mm (4.9 in)
1951	88.4 mm (3.5 in)
1952	46.7 mm (1.8 in)
1953	70.7 mm (2.8 in)
1954	61.0 mm (2.4 in)
1955	126.4 mm (5.0 in)
1956	85.8 mm (3.4 in)
1957	352.9 mm (13.9 in)
1958	83.6 mm (3.3 in)
1959	124.7 mm (4.9 in)
1960	149.6 mm (5.9 in)
1961	162.8 mm (6.4 in)
1962	89.7 mm (3.5 in)
1963	95.7 mm (3.8 in)
1964	91.7 mm (3.6 in)
1965	104.1 mm (4.1 in)
1966	91.9 mm (3.6 in)
1967	95.2 mm (3.7 in)
1968	80.8 mm (3.2 in)
1969	111.4 mm (4.4 in)
1970	102.1 mm (4.0 in)
1971	76.0 mm (3.0 in)
1972	63.3 mm (2.5 in)
1973	87.6 mm (3.4 in)
1974	154.4 mm (6.1 in)
1975	162.9 mm (6.4 in)
1976	89.7 mm (3.5 in)
1977	86.4 mm (3.4 in)
1978	79.7 mm (3.1 in)
1979	82.5 mm (3.2 in)
1980	114.3 mm (4.5 in)
1981	74.9 mm (2.9 in)
1982	176.1 mm (6.9 in)
1983	172.7 mm (6.8 in)
1984	69.3 mm (2.7 in)
1985	67.1 mm (2.6 in)
1986	355.1 mm (14.0 in)
1987	91.7 mm (3.6 in)
1988	215.2 mm (8.5 in)
1989	95.8 mm (3.8 in)
1990	72.7 mm (2.9 in)
1991	72.5 mm (2.9 in)
1992	83.0 mm (3.3 in)
1993	206.8 mm (8.1 in)
1994	146.1 mm (5.8 in)
1995	158.2 mm (6.2 in)
1996	79.7 mm (3.1 in)
1997	83.8 mm (3.3 in)
1998	164.1 mm (6.5 in)
1999	129.9 mm (5.1 in)
2000	85.7 mm (3.4 in)
2001	132.8 mm (5.2 in)
2002	104.1 mm (4.1 in)
2003	80.5 mm (3.2 in)
2004	164.8 mm (6.5 in)
2005	121.2 mm (4.8 in)
2006	94.5 mm (3.7 in)
2007	118.7 mm (4.7 in)
2008	139.4 mm (5.5 in)
2009	80.0 mm (3.1 in)
2010	100.3 mm (3.9 in)
2011	120.6 mm (4.7 in)
2012	50.3 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Hennessey 4 ESE, 1895 to 2012. The record is 76 days in 2000, marked on the chart; the median year is 35 days.

Longest dry spell (CDD) at Hennessey 4 ESE by year
Year	Longest dry spell (CDD)
1895	22 days
1896	25 days
1897	37 days
1898	29 days
1899	37 days
1915	60 days
1916	60 days
1917	28 days
1918	31 days
1919	40 days
1920	51 days
1921	60 days
1922	56 days
1923	72 days
1924	37 days
1925	47 days
1926	58 days
1927	38 days
1928	45 days
1929	44 days
1930	30 days
1931	19 days
1932	30 days
1933	44 days
1934	31 days
1935	29 days
1936	52 days
1937	21 days
1938	39 days
1939	53 days
1940	33 days
1941	20 days
1942	26 days
1943	33 days
1944	23 days
1945	50 days
1946	25 days
1947	39 days
1948	32 days
1949	31 days
1950	58 days
1951	24 days
1952	52 days
1953	20 days
1954	37 days
1955	56 days
1956	35 days
1957	24 days
1958	34 days
1959	40 days
1960	28 days
1961	35 days
1962	30 days
1963	36 days
1964	35 days
1965	52 days
1966	42 days
1967	52 days
1968	23 days
1969	23 days
1970	34 days
1971	53 days
1972	41 days
1973	39 days
1974	36 days
1975	31 days
1976	49 days
1977	31 days
1978	34 days
1979	38 days
1980	44 days
1981	21 days
1982	29 days
1983	39 days
1984	27 days
1985	25 days
1986	38 days
1987	35 days
1988	26 days
1989	35 days
1990	36 days
1991	50 days
1992	26 days
1993	25 days
1994	26 days
1995	36 days
1996	42 days
1997	25 days
1998	30 days
1999	23 days
2000	76 days
2001	24 days
2002	29 days
2003	37 days
2004	24 days
2005	47 days
2006	38 days
2007	31 days
2008	27 days
2009	38 days
2010	35 days
2011	24 days
2012	24 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

75 years with a frost

Across 75 years with a frost, the median last spring frost at Hennessey 4 ESE falls on 9 April and the median first autumn frost on 31 October, which leaves a median of 206 days between them.

In 1974 to 2011 the median growing season was 210 days. That is 3 days more than in 1921 to 1951.

Fitted over all years, the growing season changes by +0.3 days per decade at this station.

Frost dates and growing season at Hennessey 4 ESE
Measure	Median, all years	Earliest period (1921 to 1951)	Recent period (1974 to 2011)	Recent against earliest	Fitted trend
Last spring frost	9 April	7 April	10 April	3 days later	+0.3 days per decade
First autumn frost	31 October	31 October	4 November	4 days later	+0.6 days per decade
Growing days	206 days	207 days	210 days	3 days more	+0.3 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

91 years, 1920 to 2011

A day with at least 64.2 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 195.5 mm (7.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Hennessey 4 ESE: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	64.2 mm (2.5 in)
5 years	88.3 mm (3.5 in)
10 years	108.0 mm (4.3 in)
25 years	138.0 mm (5.4 in)
50 years	164.6 mm (6.5 in)
100 years	195.5 mm (7.7 in)	Longer than the 91 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, 91 years of values from 1920 to 2011.

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: 248.4 mm (9.8 in) in 1957; 162.8 mm (6.4 in) in 1961; 141.0 mm (5.6 in) in 1993.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Hennessey 4 ESE, at 1983. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1983 ran 0.2 C (0.4 F) lower than in the years before (possible change).

Suspected changes in the annual mean temperature at Hennessey 4 ESE, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1983	-0.2	-0.4	possible	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Hennessey 4 ESE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hennessey 4 ESE 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).