Palmyra Weather Records (USC00236493)

Record envelope, standing records and threshold days for Palmyra (USC00236493), Missouri, United States, with 118 years of record.

Key Facts for Palmyra

Palmyra (USC00236493) is a weather station in Missouri, United States at 39.77 latitude and -91.51 longitude, 189 m (620 ft) above sea level.
The station reports from 1893 to 2010, 118 years of record.
1,464 records set at Palmyra still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Palmyra set a daily record precipitation of 50.8 mm (2.0 in) on 17 November 2009.

About the Station

Location: Missouri, United States, 39.77 latitude, -91.51 longitude.
Elevation: 189 m (620 ft).
Period of record: 1893 to 2010, 118 years.
Eligible elements: 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 Palmyra. 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 Palmyra, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	17.2 C (63.0 F)	-30.0 C (-22.0 F)	n/a	n/a
Feb	23.3 C (73.9 F)	-27.2 C (-17.0 F)	n/a	n/a
Mar	30.6 C (87.1 F)	-19.4 C (-2.9 F)	n/a	n/a
Apr	31.1 C (88.0 F)	-11.7 C (10.9 F)	n/a	n/a
May	34.4 C (93.9 F)	0.6 C (33.1 F)	n/a	n/a
Jun	39.4 C (102.9 F)	4.4 C (39.9 F)	n/a	n/a
Jul	41.1 C (106.0 F)	8.9 C (48.0 F)	n/a	n/a
Aug	43.3 C (109.9 F)	3.9 C (39.0 F)	n/a	n/a
Sep	40.6 C (105.1 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	32.8 C (91.0 F)	-8.9 C (16.0 F)	n/a	n/a
Nov	27.8 C (82.0 F)	-13.9 C (7.0 F)	n/a	n/a
Dec	19.4 C (66.9 F)	-25.6 C (-14.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Palmyra still stand. 1913 holds the most, with 173.

Wettest Day of Each Month

Jul: 152.9 mm (6.0 in)

The wettest day on record for each calendar month at Palmyra. The most was 152.9 mm (6.0 in) on 19 July 1896.

Record daily precipitation for each month at Palmyra
Month	Record daily precipitation (mm)	Date
Jan	81.3 mm (3.2 in)	2 January 1897
Feb	83.1 mm (3.3 in)	21 February 1997
Mar	82.6 mm (3.3 in)	20 March 1945
Apr	109.7 mm (4.3 in)	10 April 1944
May	110.2 mm (4.3 in)	31 May 1974
Jun	99.1 mm (3.9 in)	25 June 1968
Jul	152.9 mm (6.0 in)	19 July 1896
Aug	117.1 mm (4.6 in)	8 August 1899
Sep	93.2 mm (3.7 in)	14 September 1961
Oct	102.6 mm (4.0 in)	17 October 1946
Nov	86.4 mm (3.4 in)	12 November 1922
Dec	78.7 mm (3.1 in)	18 December 1895

Period of Record Coverage

1897 to 1933

16 years of record at Palmyra, 1897 to 1933. 8 years have data for under 90 percent of days and are left out of rankings: 1897, 1900, 1912, 1919, 1921, 1923, 1924, 1933.

Days with data per year at Palmyra
Year	Days with data	Share of year	Complete
1897	25	7%	No
1900	1	0%	No
1912	260	71%	No
1913	345	95%	Yes
1914	345	95%	Yes
1915	353	97%	Yes
1916	366	100%	Yes
1917	362	99%	Yes
1918	356	98%	Yes
1919	233	64%	No
1920	361	99%	Yes
1921	255	70%	No
1922	363	99%	Yes
1923	193	53%	No
1924	137	37%	No
1933	13	4%	No

Latest Records

Latest records at Palmyra
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
17 November 2009	Palmyra, US	daily rain	50.8 mm (2.0 in)	24.4 mm (1.0 in)	31 years	41 of 100 (Notable)
9 October 2009	Palmyra, US	daily rain	28.7 mm (1.1 in)	3.3 mm (0.13 in)	16 years	16 of 100 (Routine)
20 August 2009	Palmyra, US	daily rain	47.2 mm (1.9 in)	16.7 mm (0.7 in)	72 years	41 of 100 (Notable)
17 August 2009	Palmyra, US	daily rain	82.0 mm (3.2 in)	29.2 mm (1.1 in)	12 years	32 of 100 (Routine)
30 April 2009	Palmyra, US	daily rain	52.6 mm (2.1 in)	1.8 mm (0.07 in)	115 years	41 of 100 (Notable)
25 March 2009	Palmyra, US	daily rain	44.5 mm (1.8 in)	0.8 mm (0.03 in)	36 years	20 of 100 (Routine)
28 December 2008	Palmyra, US	daily rain	30.7 mm (1.2 in)	7.6 mm (0.30 in)	40 years	30 of 100 (Routine)
30 November 2008	Palmyra, US	daily snow depth	2.5 cm (1.0 in)	2.5 cm (1.0 in)	60 years	20 of 100 (Routine)
4 September 2008	Palmyra, US	monthly rain (Tie)	93.2 mm (3.7 in)	tie	46 years	8 of 100 (Routine)
30 July 2008	Palmyra, US	daily rain	33.8 mm (1.3 in)	1.0 mm (0.04 in)	19 years	15 of 100 (Routine)
11 April 2008	Palmyra, US	daily rain	51.8 mm (2.0 in)	11.2 mm (0.4 in)	13 years	23 of 100 (Routine)
18 March 2008	Palmyra, US	daily rain	38.1 mm (1.5 in)	9.1 mm (0.36 in)	56 years	34 of 100 (Routine)
17 February 2008	Palmyra, US	daily rain	40.1 mm (1.6 in)	13.9 mm (0.5 in)	24 years	32 of 100 (Routine)
1 February 2008	Palmyra, US	daily snowfall	7.6 cm (3.0 in)	1.2 cm (0.5 in)	114 years	42 of 100 (Notable)
8 January 2008	Palmyra, US	daily rain	77.0 mm (3.0 in)	46.3 mm (1.8 in)	72 years	71 of 100 (Major)
18 October 2007	Palmyra, US	daily rain	16.3 mm (0.6 in)	6.9 mm (0.27 in)	65 years	20 of 100 (Routine)
25 February 2007	Palmyra, US	daily rain	36.8 mm (1.4 in)	21.6 mm (0.9 in)	72 years	55 of 100 (Notable)
13 February 2007	Palmyra, US	daily snowfall	16.5 cm (6.5 in)	1.3 cm (0.5 in)	28 years	20 of 100 (Routine)
15 January 2007	Palmyra, US	daily rain	16.5 mm (0.6 in)	5.1 mm (0.20 in)	67 years	20 of 100 (Routine)
31 December 2006	Palmyra, US	daily rain	18.5 mm (0.7 in)	4.0 mm (0.16 in)	28 years	20 of 100 (Routine)

Extremes by Year

1893 to 2010

Yearly extremes at Palmyra: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1918	37.8 C (100.0 F)	16
Coldest night (TNn)	-30.0 C (-22.0 F)	1918	-20.0 C (-4.0 F)	15
Wettest day (Rx1day)	152.9 mm (6.0 in)	1896	63.8 mm (2.5 in)	106
Wettest five days (Rx5day)	273.3 mm (10.8 in)	2004	98.3 mm (3.9 in)	105
Longest dry spell (CDD)	55 days	1956	23 days	106

Hottest day (TXx)

The hottest day of the year at Palmyra, 1893 to 2010. The record is 43.3 C (109.9 F) in 1918, marked on the chart; the median year is 37.8 C (100.0 F).

Hottest day (TXx) at Palmyra by year
Year	Hottest day (TXx)
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	20.0 C (68.0 F)
1898	n/a
1899	n/a
1900	22.2 C (72.0 F)
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1912	37.2 C (99.0 F)
1913	41.1 C (106.0 F)
1914	41.1 C (106.0 F)
1915	33.9 C (93.0 F)
1916	39.4 C (102.9 F)
1917	38.9 C (102.0 F)
1918	43.3 C (109.9 F)
1919	39.4 C (102.9 F)
1920	36.7 C (98.1 F)
1921	38.3 C (100.9 F)
1922	38.9 C (102.0 F)
1923	27.2 C (81.0 F)
1924	31.1 C (88.0 F)
1930	n/a
1931	n/a
1932	n/a
1933	28.9 C (84.0 F)
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	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a

Coldest night (TNn)

The coldest night of the year at Palmyra, 1893 to 2010. The record is -30.0 C (-22.0 F) in 1918, marked on the chart; the median year is -20.0 C (-4.0 F).

Coldest night (TNn) at Palmyra by year
Year	Coldest night (TNn)
1893	n/a
1894	n/a
1895	n/a
1896	n/a
1897	-15.6 C (3.9 F)
1898	n/a
1899	n/a
1900	-14.4 C (6.1 F)
1901	n/a
1902	n/a
1903	n/a
1904	n/a
1912	-14.4 C (6.1 F)
1913	-19.4 C (-2.9 F)
1914	-25.6 C (-14.1 F)
1915	-27.8 C (-18.0 F)
1916	-25.6 C (-14.1 F)
1917	-27.2 C (-17.0 F)
1918	-30.0 C (-22.0 F)
1919	-25.0 C (-13.0 F)
1920	-18.9 C (-2.0 F)
1921	-16.7 C (1.9 F)
1922	-18.9 C (-2.0 F)
1923	-20.0 C (-4.0 F)
1924	-28.3 C (-18.9 F)
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	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	n/a
1964	n/a
1965	n/a
1966	n/a
1967	n/a
1968	n/a
1969	n/a
1970	n/a
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	n/a
1976	n/a
1977	n/a
1978	n/a
1979	n/a
1980	n/a
1981	n/a
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a

Wettest day (Rx1day)

The wettest day of the year at Palmyra, 1893 to 2010. The record is 152.9 mm (6.0 in) in 1896, marked on the chart; the median year is 63.8 mm (2.5 in).

Wettest day (Rx1day) at Palmyra by year
Year	Wettest day (Rx1day)
1893	94.0 mm (3.7 in)
1894	54.6 mm (2.1 in)
1895	89.7 mm (3.5 in)
1896	152.9 mm (6.0 in)
1897	81.5 mm (3.2 in)
1898	50.0 mm (2.0 in)
1899	117.1 mm (4.6 in)
1900	43.2 mm (1.7 in)
1901	67.3 mm (2.6 in)
1902	37.6 mm (1.5 in)
1903	77.5 mm (3.1 in)
1904	50.8 mm (2.0 in)
1912	52.8 mm (2.1 in)
1913	72.4 mm (2.9 in)
1914	42.4 mm (1.7 in)
1915	65.5 mm (2.6 in)
1916	63.0 mm (2.5 in)
1917	65.3 mm (2.6 in)
1918	39.4 mm (1.6 in)
1919	55.1 mm (2.2 in)
1920	62.5 mm (2.5 in)
1921	41.4 mm (1.6 in)
1922	86.4 mm (3.4 in)
1923	48.8 mm (1.9 in)
1924	53.3 mm (2.1 in)
1930	50.8 mm (2.0 in)
1931	94.0 mm (3.7 in)
1932	58.7 mm (2.3 in)
1933	27.4 mm (1.1 in)
1934	61.0 mm (2.4 in)
1935	50.8 mm (2.0 in)
1936	74.4 mm (2.9 in)
1937	146.6 mm (5.8 in)
1938	82.6 mm (3.3 in)
1939	58.4 mm (2.3 in)
1940	43.2 mm (1.7 in)
1941	45.7 mm (1.8 in)
1942	75.2 mm (3.0 in)
1943	71.1 mm (2.8 in)
1944	109.7 mm (4.3 in)
1945	82.6 mm (3.3 in)
1946	102.6 mm (4.0 in)
1947	76.7 mm (3.0 in)
1948	44.5 mm (1.8 in)
1949	104.1 mm (4.1 in)
1950	33.0 mm (1.3 in)
1951	44.7 mm (1.8 in)
1952	59.7 mm (2.4 in)
1953	48.8 mm (1.9 in)
1954	43.4 mm (1.7 in)
1955	73.7 mm (2.9 in)
1956	43.4 mm (1.7 in)
1957	68.6 mm (2.7 in)
1958	102.9 mm (4.1 in)
1959	34.0 mm (1.3 in)
1960	62.2 mm (2.4 in)
1961	93.2 mm (3.7 in)
1962	112.0 mm (4.4 in)
1963	67.6 mm (2.7 in)
1964	48.3 mm (1.9 in)
1965	68.3 mm (2.7 in)
1966	83.8 mm (3.3 in)
1967	50.8 mm (2.0 in)
1968	99.1 mm (3.9 in)
1969	68.3 mm (2.7 in)
1970	104.6 mm (4.1 in)
1971	40.6 mm (1.6 in)
1972	44.2 mm (1.7 in)
1973	82.3 mm (3.2 in)
1974	110.2 mm (4.3 in)
1975	72.6 mm (2.9 in)
1976	50.8 mm (2.0 in)
1977	66.8 mm (2.6 in)
1978	50.0 mm (2.0 in)
1979	51.8 mm (2.0 in)
1980	50.3 mm (2.0 in)
1981	104.1 mm (4.1 in)
1982	83.6 mm (3.3 in)
1983	63.8 mm (2.5 in)
1984	71.1 mm (2.8 in)
1985	63.8 mm (2.5 in)
1986	80.5 mm (3.2 in)
1987	87.1 mm (3.4 in)
1988	41.7 mm (1.6 in)
1989	64.5 mm (2.5 in)
1990	66.8 mm (2.6 in)
1991	87.4 mm (3.4 in)
1992	50.8 mm (2.0 in)
1993	115.6 mm (4.6 in)
1994	61.7 mm (2.4 in)
1995	58.4 mm (2.3 in)
1996	61.0 mm (2.4 in)
1997	83.1 mm (3.3 in)
1998	50.8 mm (2.0 in)
1999	50.8 mm (2.0 in)
2000	45.7 mm (1.8 in)
2001	58.2 mm (2.3 in)
2002	54.4 mm (2.1 in)
2003	69.9 mm (2.8 in)
2004	92.2 mm (3.6 in)
2005	49.8 mm (2.0 in)
2006	65.8 mm (2.6 in)
2007	36.8 mm (1.4 in)
2008	93.2 mm (3.7 in)
2009	82.0 mm (3.2 in)
2010	33.0 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Palmyra, 1893 to 2010. The record is 273.3 mm (10.8 in) in 2004, marked on the chart; the median year is 98.3 mm (3.9 in).

Wettest five days (Rx5day) at Palmyra by year
Year	Wettest five days (Rx5day)
1893	116.8 mm (4.6 in)
1894	68.6 mm (2.7 in)
1895	129.6 mm (5.1 in)
1896	199.9 mm (7.9 in)
1897	138.9 mm (5.5 in)
1898	78.8 mm (3.1 in)
1899	157.3 mm (6.2 in)
1900	59.7 mm (2.4 in)
1901	71.9 mm (2.8 in)
1902	84.9 mm (3.3 in)
1903	88.7 mm (3.5 in)
1904	96.6 mm (3.8 in)
1912	92.9 mm (3.7 in)
1913	102.4 mm (4.0 in)
1914	89.7 mm (3.5 in)
1915	113.8 mm (4.5 in)
1916	165.7 mm (6.5 in)
1917	101.8 mm (4.0 in)
1918	110.6 mm (4.4 in)
1919	100.6 mm (4.0 in)
1920	133.4 mm (5.3 in)
1921	52.1 mm (2.1 in)
1922	110.8 mm (4.4 in)
1923	73.1 mm (2.9 in)
1924	63.7 mm (2.5 in)
1930	n/a
1931	144.8 mm (5.7 in)
1932	93.5 mm (3.7 in)
1933	38.4 mm (1.5 in)
1934	86.2 mm (3.4 in)
1935	102.6 mm (4.0 in)
1936	99.8 mm (3.9 in)
1937	185.7 mm (7.3 in)
1938	135.9 mm (5.4 in)
1939	104.2 mm (4.1 in)
1940	72.7 mm (2.9 in)
1941	106.2 mm (4.2 in)
1942	80.3 mm (3.2 in)
1943	109.0 mm (4.3 in)
1944	128.5 mm (5.1 in)
1945	141.8 mm (5.6 in)
1946	106.2 mm (4.2 in)
1947	94.3 mm (3.7 in)
1948	69.9 mm (2.8 in)
1949	213.3 mm (8.4 in)
1950	39.3 mm (1.5 in)
1951	89.8 mm (3.5 in)
1952	61.0 mm (2.4 in)
1953	52.6 mm (2.1 in)
1954	66.8 mm (2.6 in)
1955	104.4 mm (4.1 in)
1956	62.0 mm (2.4 in)
1957	74.4 mm (2.9 in)
1958	135.7 mm (5.3 in)
1959	73.5 mm (2.9 in)
1960	102.1 mm (4.0 in)
1961	154.2 mm (6.1 in)
1962	158.7 mm (6.2 in)
1963	116.4 mm (4.6 in)
1964	117.9 mm (4.6 in)
1965	85.8 mm (3.4 in)
1966	114.5 mm (4.5 in)
1967	92.8 mm (3.7 in)
1968	105.7 mm (4.2 in)
1969	175.0 mm (6.9 in)
1970	212.3 mm (8.4 in)
1971	47.9 mm (1.9 in)
1972	78.2 mm (3.1 in)
1973	99.5 mm (3.9 in)
1974	120.1 mm (4.7 in)
1975	94.2 mm (3.7 in)
1976	69.3 mm (2.7 in)
1977	103.0 mm (4.1 in)
1978	71.3 mm (2.8 in)
1979	77.0 mm (3.0 in)
1980	88.9 mm (3.5 in)
1981	150.3 mm (5.9 in)
1982	142.5 mm (5.6 in)
1983	91.0 mm (3.6 in)
1984	88.2 mm (3.5 in)
1985	112.3 mm (4.4 in)
1986	145.7 mm (5.7 in)
1987	97.5 mm (3.8 in)
1988	45.5 mm (1.8 in)
1989	76.7 mm (3.0 in)
1990	98.3 mm (3.9 in)
1991	111.6 mm (4.4 in)
1992	98.3 mm (3.9 in)
1993	131.6 mm (5.2 in)
1994	108.2 mm (4.3 in)
1995	114.8 mm (4.5 in)
1996	89.1 mm (3.5 in)
1997	83.1 mm (3.3 in)
1998	100.4 mm (4.0 in)
1999	71.8 mm (2.8 in)
2000	69.6 mm (2.7 in)
2001	87.2 mm (3.4 in)
2002	158.0 mm (6.2 in)
2003	82.4 mm (3.2 in)
2004	273.3 mm (10.8 in)
2005	79.7 mm (3.1 in)
2006	97.5 mm (3.8 in)
2007	67.5 mm (2.7 in)
2008	131.0 mm (5.2 in)
2009	153.3 mm (6.0 in)
2010	58.4 mm (2.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Palmyra, 1893 to 2010. The record is 55 days in 1956, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Palmyra by year
Year	Longest dry spell (CDD)
1893	33 days
1894	27 days
1895	29 days
1896	21 days
1897	25 days
1898	16 days
1899	17 days
1900	19 days
1901	24 days
1902	24 days
1903	15 days
1904	13 days
1912	27 days
1913	23 days
1914	27 days
1915	24 days
1916	24 days
1917	39 days
1918	22 days
1919	18 days
1920	28 days
1921	13 days
1922	23 days
1923	17 days
1924	26 days
1930	1 day
1931	28 days
1932	17 days
1933	19 days
1934	48 days
1935	18 days
1936	34 days
1937	23 days
1938	24 days
1939	37 days
1940	32 days
1941	31 days
1942	17 days
1943	28 days
1944	26 days
1945	25 days
1946	28 days
1947	39 days
1948	29 days
1949	30 days
1950	31 days
1951	20 days
1952	27 days
1953	23 days
1954	22 days
1955	29 days
1956	55 days
1957	23 days
1958	32 days
1959	31 days
1960	27 days
1961	15 days
1962	20 days
1963	33 days
1964	29 days
1965	17 days
1966	20 days
1967	25 days
1968	17 days
1969	19 days
1970	17 days
1971	25 days
1972	18 days
1973	21 days
1974	16 days
1975	14 days
1976	27 days
1977	17 days
1978	17 days
1979	36 days
1980	23 days
1981	16 days
1982	20 days
1983	21 days
1984	28 days
1985	16 days
1986	30 days
1987	21 days
1988	27 days
1989	21 days
1990	27 days
1991	22 days
1992	19 days
1993	20 days
1994	20 days
1995	25 days
1996	22 days
1997	18 days
1998	23 days
1999	45 days
2000	18 days
2001	16 days
2002	32 days
2003	26 days
2004	26 days
2005	22 days
2006	22 days
2007	22 days
2008	14 days
2009	24 days
2010	23 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.

Rainfall Return Levels

93 years, 1894 to 2009

A day with at least 65.0 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 146.6 mm (5.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Palmyra: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	65.0 mm (2.6 in)
5 years	86.3 mm (3.4 in)
10 years	100.7 mm (4.0 in)
25 years	119.0 mm (4.7 in)
50 years	132.8 mm (5.2 in)
100 years	146.6 mm (5.8 in)	Longer than the 93 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, 93 years of values from 1894 to 2009.

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: 152.9 mm (6.0 in) in 1896; 146.6 mm (5.8 in) in 1937; 117.1 mm (4.6 in) in 1899.

Download the Data

Data for Palmyra standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Palmyra 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 2026-10-14 (14 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).