Swan Lake Weather Records (USC00228591)

Record envelope, standing records and threshold days for Swan Lake (USC00228591), Mississippi, United States, with 96 years of record.

Key Facts for Swan Lake

Swan Lake (USC00228591) is a weather station in Mississippi, United States at 33.85 latitude and -90.32 longitude, 44 m (145 ft) above sea level.
The station reports from 1905 to 2000, 96 years of record.
1,138 records set at Swan Lake still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Swan Lake set a monthly record daily precipitation of 101.6 mm (4.0 in) on 1 April 2000.

About the Station

Location: Mississippi, United States, 33.85 latitude, -90.32 longitude.
Elevation: 44 m (145 ft).
Period of record: 1905 to 2000, 96 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 Swan Lake. 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 Swan Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-6.7 C (19.9 F)	n/a	n/a
Feb	23.3 C (73.9 F)	-7.8 C (18.0 F)	n/a	n/a
Mar	24.4 C (75.9 F)	-2.2 C (28.0 F)	n/a	n/a
Apr	32.8 C (91.0 F)	-0.6 C (30.9 F)	n/a	n/a
May	35.0 C (95.0 F)	5.0 C (41.0 F)	n/a	n/a
Jun	36.1 C (97.0 F)	14.4 C (57.9 F)	n/a	n/a
Jul	36.1 C (97.0 F)	16.1 C (61.0 F)	n/a	n/a
Aug	n/a	n/a	n/a	n/a
Sep	n/a	n/a	n/a	n/a
Oct	31.1 C (88.0 F)	0.0 C (32.0 F)	n/a	n/a
Nov	26.7 C (80.1 F)	-3.9 C (25.0 F)	n/a	n/a
Dec	17.2 C (63.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,138 standing records

1,138 records at Swan Lake still stand. 1905 holds the most, with 643.

Wettest Day of Each Month

Jul: 200.7 mm (7.9 in)

The wettest day on record for each calendar month at Swan Lake. The most was 200.7 mm (7.9 in) on 26 July 1958.

Record daily precipitation for each month at Swan Lake
Month	Record daily precipitation (mm)	Date
Jan	118.4 mm (4.7 in)	11 January 1974
Feb	126.2 mm (5.0 in)	19 February 1991
Mar	112.3 mm (4.4 in)	4 March 1977
Apr	101.6 mm (4.0 in)	1 April 2000
May	133.4 mm (5.3 in)	26 May 1909
Jun	101.6 mm (4.0 in)	13 June 1989
Jul	200.7 mm (7.9 in)	26 July 1958
Aug	79.0 mm (3.1 in)	16 August 1948
Sep	114.3 mm (4.5 in)	21 September 1958
Oct	111.3 mm (4.4 in)	7 October 1984
Nov	193.0 mm (7.6 in)	21 November 1906
Dec	161.0 mm (6.3 in)	26 December 1982

Period of Record Coverage

1905 to 1906

2 years of record at Swan Lake, 1905 to 1906. 2 years have data for under 90 percent of days and are left out of rankings: 1905, 1906.

Latest Records

Latest records at Swan Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
1 April 2000	Swan Lake, US	monthly rain	101.6 mm (4.0 in)	14.0 mm (0.6 in)	44 years	39 of 100 (Notable)
1 November 1999	Swan Lake, US	daily rain	48.8 mm (1.9 in)	18.3 mm (0.7 in)	8 years	18 of 100 (Routine)
5 October 1999	Swan Lake, US	daily rain	26.2 mm (1.0 in)	1.6 mm (0.06 in)	49 years	23 of 100 (Routine)
22 January 1999	Swan Lake, US	daily rain	53.3 mm (2.1 in)	2.5 mm (0.10 in)	92 years	37 of 100 (Notable)
29 May 1998	Swan Lake, US	daily rain	52.6 mm (2.1 in)	5.1 mm (0.20 in)	19 years	16 of 100 (Routine)
23 October 1997	Swan Lake, US	daily rain	48.0 mm (1.9 in)	13.7 mm (0.5 in)	40 years	29 of 100 (Routine)
26 September 1997	Swan Lake, US	daily rain	42.4 mm (1.7 in)	11.9 mm (0.5 in)	4 years	16 of 100 (Routine)
30 July 1997	Swan Lake, US	daily rain	50.8 mm (2.0 in)	16.5 mm (0.6 in)	40 years	29 of 100 (Routine)
29 June 1997	Swan Lake, US	daily rain	74.9 mm (2.9 in)	46.2 mm (1.8 in)	4 years	40 of 100 (Notable)
17 June 1997	Swan Lake, US	daily rain	52.3 mm (2.1 in)	35.8 mm (1.4 in)	46 years	45 of 100 (Notable)
10 June 1997	Swan Lake, US	daily rain	51.1 mm (2.0 in)	2.6 mm (0.10 in)	36 years	20 of 100 (Routine)
20 May 1997	Swan Lake, US	daily rain	30.2 mm (1.2 in)	4.8 mm (0.19 in)	7 years	13 of 100 (Routine)
1 March 1997	Swan Lake, US	daily rain	50.8 mm (2.0 in)	7.6 mm (0.30 in)	90 years	40 of 100 (Notable)
24 January 1997	Swan Lake, US	daily rain	50.8 mm (2.0 in)	25.1 mm (1.0 in)	23 years	30 of 100 (Routine)
8 January 1997	Swan Lake, US	daily rain	18.5 mm (0.7 in)	0.2 mm (0.01 in)	19 years	14 of 100 (Routine)
8 November 1996	Swan Lake, US	daily rain	38.6 mm (1.5 in)	3.0 mm (0.12 in)	39 years	21 of 100 (Routine)
2 November 1996	Swan Lake, US	daily rain	35.6 mm (1.4 in)	11.5 mm (0.5 in)	12 years	16 of 100 (Routine)
26 October 1996	Swan Lake, US	daily rain	35.6 mm (1.4 in)	14.8 mm (0.6 in)	21 years	24 of 100 (Routine)
28 July 1996	Swan Lake, US	daily rain	35.1 mm (1.4 in)	7.2 mm (0.28 in)	12 years	15 of 100 (Routine)
23 April 1996	Swan Lake, US	daily rain	49.8 mm (2.0 in)	14.2 mm (0.6 in)	39 years	27 of 100 (Routine)

Extremes by Year

1905 to 2000

Yearly extremes at Swan Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.1 C (97.0 F)	1905	35.3 C (95.5 F)	2
Coldest night (TNn)	-7.8 C (18.0 F)	1906	-6.4 C (20.5 F)	2
Wettest day (Rx1day)	200.7 mm (7.9 in)	1958	86.6 mm (3.4 in)	56
Wettest five days (Rx5day)	302.3 mm (11.9 in)	1906	140.7 mm (5.5 in)	56
Longest dry spell (CDD)	52 days	1952	23 days	56

Hottest day (TXx)

The hottest day of the year at Swan Lake, 1905 to 2000. The record is 36.1 C (97.0 F) in 1905, marked on the chart; the median year is 35.3 C (95.5 F).

Hottest day (TXx) at Swan Lake by year
Year	Hottest day (TXx)
1905	36.1 C (97.0 F)
1906	34.4 C (93.9 F)
1907	n/a
1908	n/a
1909	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
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

Coldest night (TNn)

The coldest night of the year at Swan Lake, 1905 to 2000. The record is -7.8 C (18.0 F) in 1906, marked on the chart; the median year is -6.4 C (20.5 F).

Coldest night (TNn) at Swan Lake by year
Year	Coldest night (TNn)
1905	-5.0 C (23.0 F)
1906	-7.8 C (18.0 F)
1907	n/a
1908	n/a
1909	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
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

Wettest day (Rx1day)

The wettest day of the year at Swan Lake, 1905 to 2000. The record is 200.7 mm (7.9 in) in 1958, marked on the chart; the median year is 86.6 mm (3.4 in).

Wettest day (Rx1day) at Swan Lake by year
Year	Wettest day (Rx1day)
1905	69.1 mm (2.7 in)
1906	193.0 mm (7.6 in)
1907	63.0 mm (2.5 in)
1908	78.7 mm (3.1 in)
1909	133.4 mm (5.3 in)
1948	140.2 mm (5.5 in)
1949	85.6 mm (3.4 in)
1950	103.4 mm (4.1 in)
1951	108.0 mm (4.3 in)
1952	69.3 mm (2.7 in)
1953	77.5 mm (3.1 in)
1954	73.7 mm (2.9 in)
1955	87.6 mm (3.4 in)
1956	109.5 mm (4.3 in)
1957	106.7 mm (4.2 in)
1958	200.7 mm (7.9 in)
1959	114.3 mm (4.5 in)
1960	57.4 mm (2.3 in)
1961	125.0 mm (4.9 in)
1962	56.9 mm (2.2 in)
1963	79.2 mm (3.1 in)
1964	124.0 mm (4.9 in)
1965	52.6 mm (2.1 in)
1966	107.4 mm (4.2 in)
1967	83.1 mm (3.3 in)
1968	128.0 mm (5.0 in)
1969	122.9 mm (4.8 in)
1970	80.5 mm (3.2 in)
1971	64.5 mm (2.5 in)
1972	67.8 mm (2.7 in)
1973	133.9 mm (5.3 in)
1974	118.4 mm (4.7 in)
1975	83.3 mm (3.3 in)
1976	74.2 mm (2.9 in)
1977	112.3 mm (4.4 in)
1978	75.2 mm (3.0 in)
1979	81.0 mm (3.2 in)
1982	161.0 mm (6.3 in)
1983	94.0 mm (3.7 in)
1984	111.3 mm (4.4 in)
1985	66.0 mm (2.6 in)
1986	97.8 mm (3.9 in)
1987	91.2 mm (3.6 in)
1988	62.2 mm (2.4 in)
1989	110.5 mm (4.4 in)
1990	101.6 mm (4.0 in)
1991	126.2 mm (5.0 in)
1992	59.4 mm (2.3 in)
1993	74.9 mm (2.9 in)
1994	106.7 mm (4.2 in)
1995	68.3 mm (2.7 in)
1996	65.3 mm (2.6 in)
1997	74.9 mm (2.9 in)
1998	52.6 mm (2.1 in)
1999	53.3 mm (2.1 in)
2000	101.6 mm (4.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Swan Lake, 1905 to 2000. The record is 302.3 mm (11.9 in) in 1906, marked on the chart; the median year is 140.7 mm (5.5 in).

Wettest five days (Rx5day) at Swan Lake by year
Year	Wettest five days (Rx5day)
1905	78.8 mm (3.1 in)
1906	302.3 mm (11.9 in)
1907	68.1 mm (2.7 in)
1908	158.5 mm (6.2 in)
1909	203.3 mm (8.0 in)
1948	170.9 mm (6.7 in)
1949	117.7 mm (4.6 in)
1950	189.2 mm (7.4 in)
1951	137.2 mm (5.4 in)
1952	83.8 mm (3.3 in)
1953	95.0 mm (3.7 in)
1954	158.8 mm (6.3 in)
1955	154.9 mm (6.1 in)
1956	233.5 mm (9.2 in)
1957	185.4 mm (7.3 in)
1958	291.7 mm (11.5 in)
1959	117.1 mm (4.6 in)
1960	123.2 mm (4.9 in)
1961	220.5 mm (8.7 in)
1962	114.8 mm (4.5 in)
1963	110.2 mm (4.3 in)
1964	148.4 mm (5.8 in)
1965	126.7 mm (5.0 in)
1966	139.6 mm (5.5 in)
1967	83.9 mm (3.3 in)
1968	177.3 mm (7.0 in)
1969	171.7 mm (6.8 in)
1970	141.7 mm (5.6 in)
1971	125.2 mm (4.9 in)
1972	127.8 mm (5.0 in)
1973	198.4 mm (7.8 in)
1974	142.3 mm (5.6 in)
1975	149.8 mm (5.9 in)
1976	102.7 mm (4.0 in)
1977	137.4 mm (5.4 in)
1978	102.9 mm (4.1 in)
1979	114.7 mm (4.5 in)
1982	228.6 mm (9.0 in)
1983	131.3 mm (5.2 in)
1984	178.6 mm (7.0 in)
1985	102.1 mm (4.0 in)
1986	157.5 mm (6.2 in)
1987	121.4 mm (4.8 in)
1988	74.7 mm (2.9 in)
1989	183.1 mm (7.2 in)
1990	138.7 mm (5.5 in)
1991	228.6 mm (9.0 in)
1992	148.6 mm (5.9 in)
1993	139.7 mm (5.5 in)
1994	153.4 mm (6.0 in)
1995	154.7 mm (6.1 in)
1996	157.8 mm (6.2 in)
1997	124.1 mm (4.9 in)
1998	81.3 mm (3.2 in)
1999	113.2 mm (4.5 in)
2000	161.3 mm (6.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Swan Lake, 1905 to 2000. The record is 52 days in 1952, marked on the chart; the median year is 23 days.

Longest dry spell (CDD) at Swan Lake by year
Year	Longest dry spell (CDD)
1905	22 days
1906	32 days
1907	18 days
1908	44 days
1909	22 days
1948	13 days
1949	23 days
1950	14 days
1951	28 days
1952	52 days
1953	44 days
1954	20 days
1955	24 days
1956	24 days
1957	19 days
1958	22 days
1959	21 days
1960	16 days
1961	30 days
1962	28 days
1963	46 days
1964	25 days
1965	23 days
1966	24 days
1967	21 days
1968	18 days
1969	30 days
1970	21 days
1971	17 days
1972	20 days
1973	18 days
1974	17 days
1975	15 days
1976	27 days
1977	20 days
1978	24 days
1979	15 days
1982	16 days
1983	14 days
1984	52 days
1985	24 days
1986	28 days
1987	32 days
1988	39 days
1989	23 days
1990	38 days
1991	19 days
1992	23 days
1993	27 days
1994	32 days
1995	21 days
1996	22 days
1997	17 days
1998	38 days
1999	34 days
2000	9 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

44 years, 1948 to 1999

A day with at least 89.2 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 182.3 mm (7.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Swan Lake: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	89.2 mm (3.5 in)
5 years	115.7 mm (4.6 in)
10 years	132.6 mm (5.2 in)
25 years	153.3 mm (6.0 in)
50 years	168.1 mm (6.6 in)	Longer than the 44 years of record
100 years	182.3 mm (7.2 in)	Longer than the 44 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, 44 years of values from 1948 to 1999.

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: 200.7 mm (7.9 in) in 1958; 140.2 mm (5.5 in) in 1948; 133.9 mm (5.3 in) in 1973.

Download the Data

Data for Swan Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Swan Lake 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).

Days with data per year at Swan Lake
Year	Days with data	Share of year	Complete
1905	196	54%	No
1906	147	40%	No