Clewiston Weather Records (USC00081654)

Record envelope, standing records and threshold days for Clewiston (USC00081654), Florida, United States, with 56 years of record.

Key Facts for Clewiston

Clewiston (USC00081654) is a weather station in Florida, United States at 26.74 latitude and -80.94 longitude, 6 m (20 ft) above sea level.
The station reports from 1948 to 2003, 56 years of record.
1,464 records set at Clewiston still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Clewiston set a daily record high minimum temperature of 25.0 C (77.0 F) on 30 June 2003.

About the Station

Location: Florida, United States, 26.74 latitude, -80.94 longitude.
Elevation: 6 m (20 ft).
Period of record: 1948 to 2003, 56 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 Clewiston. 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 Clewiston, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.2 C (90.0 F)	-3.3 C (26.1 F)	n/a	n/a
Feb	33.3 C (91.9 F)	-0.6 C (30.9 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-1.7 C (28.9 F)	n/a	n/a
Apr	36.7 C (98.1 F)	4.4 C (39.9 F)	n/a	n/a
May	36.7 C (98.1 F)	10.6 C (51.1 F)	n/a	n/a
Jun	38.3 C (100.9 F)	15.0 C (59.0 F)	n/a	n/a
Jul	38.3 C (100.9 F)	18.9 C (66.0 F)	n/a	n/a
Aug	38.3 C (100.9 F)	15.6 C (60.1 F)	n/a	n/a
Sep	36.7 C (98.1 F)	18.3 C (64.9 F)	n/a	n/a
Oct	36.1 C (97.0 F)	9.4 C (48.9 F)	n/a	n/a
Nov	33.9 C (93.0 F)	1.7 C (35.1 F)	n/a	n/a
Dec	33.3 C (91.9 F)	-3.3 C (26.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Clewiston still stand. 1981 holds the most, with 57.

Standing records at Clewiston by the year they were set
Year set	Standing records
1949	3
1950	40
1951	48
1952	22
1953	30
1954	34
1955	20
1956	42
1957	31
1958	34
1959	29
1960	41
1961	28
1962	44
1963	20
1964	29
1965	21
1966	19
1967	23
1968	36
1969	19
1970	30
1971	43
1972	27
1973	29
1974	21
1975	19
1976	13
1977	38
1978	30
1979	22
1980	26
1981	57
1982	37
1983	34
1984	37
1985	38
1986	25
1987	23
1988	19
1989	32
1990	31
1991	19
1992	30
1993	17
1994	29
1995	15
1996	10
1997	12
1998	22
1999	7
2000	11
2001	17
2002	19
2003	12

All-Time Record Progression

6 new records

6 all-time records were set at Clewiston between 28 June 1980 and 25 December 1989. Each dot is a new record.

When Clewiston set new all-time records
Date	Kind	Detail
1980-06-28	Record high maximum temperature	Record high maximum temperature 37.2 C (99.0 F)
1980-07-14	Record high maximum temperature	Record high maximum temperature 37.8 C (100.0 F)
1981-07-16	Record high maximum temperature	Record high maximum temperature 38.3 C (100.9 F)
1982-01-12	Record low minimum temperature	Record low minimum temperature -3.3 C (26.1 F)
1982-05-27	Record daily precipitation	Record daily precipitation 243.8 mm (9.6 in)
1989-12-25	Record low maximum temperature	Record low maximum temperature 5.6 C (42.1 F)

Wettest Day of Each Month

May: 243.8 mm (9.6 in)

The wettest day on record for each calendar month at Clewiston. The most was 243.8 mm (9.6 in) on 27 May 1982.

Record daily precipitation for each month at Clewiston
Month	Record daily precipitation (mm)	Date
Jan	97.8 mm (3.9 in)	16 January 1991
Feb	87.1 mm (3.4 in)	7 February 1965
Mar	125.2 mm (4.9 in)	26 March 1970
Apr	108.7 mm (4.3 in)	26 April 1964
May	243.8 mm (9.6 in)	27 May 1982
Jun	151.1 mm (5.9 in)	12 June 1965
Jul	96.3 mm (3.8 in)	22 July 2002
Aug	112.5 mm (4.4 in)	27 August 1988
Sep	167.9 mm (6.6 in)	21 September 1948
Oct	190.5 mm (7.5 in)	2 October 1951
Nov	154.7 mm (6.1 in)	4 November 1977
Dec	149.1 mm (5.9 in)	24 December 1957

Period of Record Coverage

1949 to 2003

55 years of record at Clewiston, 1949 to 2003. 10 years have data for under 90 percent of days and are left out of rankings: 1949, 1995, 1996, 1997, 1998, 1999, 2000, 2001 and others.

Days with data per year at Clewiston
Year	Days with data	Share of year	Complete
1949	57	16%	No
1950	364	100%	Yes
1951	354	97%	Yes
1952	360	98%	Yes
1953	362	99%	Yes
1954	356	98%	Yes
1955	334	92%	Yes
1956	357	98%	Yes
1957	344	94%	Yes
1958	361	99%	Yes
1959	365	100%	Yes
1960	365	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	364	99%	Yes
1965	364	100%	Yes
1966	365	100%	Yes
1967	363	99%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes
1981	365	100%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	366	100%	Yes
1985	362	99%	Yes
1986	364	100%	Yes
1987	363	99%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	365	100%	Yes
1991	365	100%	Yes
1992	366	100%	Yes
1993	364	100%	Yes
1994	365	100%	Yes
1995	257	70%	No
1996	239	65%	No
1997	231	63%	No
1998	176	48%	No
1999	176	48%	No
2000	40	11%	No
2001	188	52%	No
2002	180	49%	No
2003	94	26%	No

Latest Records

Latest records at Clewiston
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
30 June 2003	Clewiston, US	daily high min	25.0 C (77.0 F)	0.6 C (1.1 F)	49 years	23 of 100 (Routine)
28 June 2003	Clewiston, US	daily low max (Tie)	30.6 C (87.1 F)	tie	49 years	4 of 100 (Routine)
26 June 2003	Clewiston, US	daily low min (Tie)	20.6 C (69.1 F)	tie	32 years	3 of 100 (Routine)
23 June 2003	Clewiston, US	daily low max	27.2 C (81.0 F)	0.6 C (1.1 F)	8 years	10 of 100 (Routine)
21 June 2003	Clewiston, US	daily rain	53.8 mm (2.1 in)	5.8 mm (0.23 in)	4 years	8 of 100 (Routine)
16 June 2003	Clewiston, US	daily low max (Tie)	28.9 C (84.0 F)	tie	18 years	2 of 100 (Routine)
19 May 2003	Clewiston, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	34 years	17 of 100 (Routine)
13 May 2003	Clewiston, US	daily high max	34.4 C (93.9 F)	0.5 C (0.9 F)	32 years	16 of 100 (Routine)
9 May 2003	Clewiston, US	daily high min (Tie)	22.8 C (73.0 F)	tie	24 years	3 of 100 (Routine)
8 May 2003	Clewiston, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	32 years	16 of 100 (Routine)
6 May 2003	Clewiston, US	daily high min (Tie)	22.8 C (73.0 F)	tie	44 years	4 of 100 (Routine)
22 April 2003	Clewiston, US	daily low min (Tie)	11.7 C (53.1 F)	tie	14 years	2 of 100 (Routine)
1 April 2003	Clewiston, US	daily low max	17.2 C (63.0 F)	2.2 C (4.0 F)	38 years	23 of 100 (Routine)
24 March 2003	Clewiston, US	daily high max	33.9 C (93.0 F)	0.6 C (1.1 F)	50 years	21 of 100 (Routine)
21 March 2003	Clewiston, US	daily high min	22.8 C (73.0 F)	1.7 C (3.1 F)	25 years	16 of 100 (Routine)
17 March 2003	Clewiston, US	daily rain	39.6 mm (1.6 in)	1.2 mm (0.05 in)	33 years	15 of 100 (Routine)
12 March 2003	Clewiston, US	daily high min	22.8 C (73.0 F)	2.2 C (4.0 F)	25 years	17 of 100 (Routine)
11 March 2003	Clewiston, US	daily high min	22.2 C (72.0 F)	1.6 C (2.9 F)	29 years	17 of 100 (Routine)
10 March 2003	Clewiston, US	daily high max	32.8 C (91.0 F)	1.7 C (3.1 F)	38 years	20 of 100 (Routine)
7 March 2003	Clewiston, US	daily high max	33.3 C (91.9 F)	0.5 C (0.9 F)	25 years	13 of 100 (Routine)

Climate Trend

44 complete years, 1950 to 1994

One stripe for each of 44 complete years at Clewiston, 1950 to 1994. Blue stripes are years cooler than the station's own mean of 23.3 C (74.0 F); red stripes are warmer. The coolest year was 1968, at 22.4 C (72.3 F), and the warmest was 1990, at 24.5 C (76.1 F). The strongest colour marks a difference of 1.2 C (2.2 F).

Annual mean temperature at Clewiston as warming stripes, 1950 to 1994
Year	Annual mean temperature	Difference from the station mean
1950	22.9 C	-0.41 C
1951	22.9 C	-0.50 C
1952	23.3 C	-0.03 C
1953	23.9 C	+0.52 C
1954	23.0 C	-0.36 C
1956	23.0 C	-0.35 C
1957	23.7 C	+0.37 C
1958	22.9 C	-0.46 C
1959	23.7 C	+0.32 C
1960	23.0 C	-0.37 C
1961	23.4 C	+0.05 C
1962	23.1 C	-0.23 C
1963	22.7 C	-0.67 C
1964	23.6 C	+0.24 C
1965	23.5 C	+0.12 C
1966	22.9 C	-0.41 C
1967	23.5 C	+0.16 C
1968	22.4 C	-0.96 C
1969	22.6 C	-0.73 C
1970	22.7 C	-0.62 C
1971	23.3 C	-0.07 C
1972	23.8 C	+0.42 C
1973	23.1 C	-0.26 C
1974	23.6 C	+0.21 C
1975	24.0 C	+0.66 C
1976	22.8 C	-0.52 C
1977	22.9 C	-0.44 C
1978	23.2 C	-0.17 C
1979	23.6 C	+0.25 C
1980	23.3 C	-0.01 C
1981	22.9 C	-0.42 C
1982	24.3 C	+0.92 C
1983	23.2 C	-0.12 C
1984	23.4 C	+0.00 C
1985	23.8 C	+0.41 C
1986	23.9 C	+0.51 C
1987	23.2 C	-0.12 C
1988	23.1 C	-0.22 C
1989	23.7 C	+0.34 C
1990	24.5 C	+1.17 C
1991	24.0 C	+0.68 C
1992	23.3 C	-0.03 C
1993	23.5 C	+0.11 C
1994	24.2 C	+0.85 C

The annual mean temperature here has risen by 0.15 C (0.04 to 0.25) per decade over 1950 to 1994. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Clewiston
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.15 C (0.04 to 0.25) per decade	0.3 F (0.1 to 0.5) per decade	1950 to 1994	44	Rise
Mean daily maximum	0.13 C (0.00 to 0.26) per decade	0.24 F (0.01 to 0.47) per decade	1950 to 1994	44	Rise
Mean daily minimum	0.16 C (0.03 to 0.29) per decade	0.3 F (0.1 to 0.5) per decade	1950 to 1994	44	Rise

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

1948 to 2003

Yearly extremes at Clewiston: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	1981	36.1 C (97.0 F)	55
Coldest night (TNn)	-3.3 C (26.1 F)	1982	2.2 C (36.0 F)	55
Wettest day (Rx1day)	243.8 mm (9.6 in)	1982	78.8 mm (3.1 in)	56
Wettest five days (Rx5day)	316.9 mm (12.5 in)	1982	138.3 mm (5.4 in)	56
Longest dry spell (CDD)	57 days	1970	29 days	56

Hottest day (TXx)

The hottest day of the year at Clewiston, 1948 to 2003. The record is 38.3 C (100.9 F) in 1981, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Clewiston by year
Year	Hottest day (TXx)
1948	n/a
1949	31.1 C (88.0 F)
1950	36.1 C (97.0 F)
1951	35.6 C (96.1 F)
1952	35.6 C (96.1 F)
1953	35.6 C (96.1 F)
1954	36.1 C (97.0 F)
1955	35.0 C (95.0 F)
1956	36.7 C (98.1 F)
1957	35.0 C (95.0 F)
1958	36.1 C (97.0 F)
1959	35.0 C (95.0 F)
1960	34.4 C (93.9 F)
1961	35.6 C (96.1 F)
1962	36.7 C (98.1 F)
1963	36.1 C (97.0 F)
1964	36.1 C (97.0 F)
1965	35.6 C (96.1 F)
1966	35.6 C (96.1 F)
1967	36.1 C (97.0 F)
1968	35.0 C (95.0 F)
1969	35.0 C (95.0 F)
1970	36.1 C (97.0 F)
1971	35.6 C (96.1 F)
1972	36.1 C (97.0 F)
1973	36.7 C (98.1 F)
1974	36.1 C (97.0 F)
1975	35.6 C (96.1 F)
1976	36.1 C (97.0 F)
1977	36.1 C (97.0 F)
1978	36.1 C (97.0 F)
1979	35.6 C (96.1 F)
1980	37.8 C (100.0 F)
1981	38.3 C (100.9 F)
1982	36.7 C (98.1 F)
1983	36.1 C (97.0 F)
1984	36.1 C (97.0 F)
1985	37.2 C (99.0 F)
1986	36.1 C (97.0 F)
1987	37.2 C (99.0 F)
1988	35.6 C (96.1 F)
1989	38.3 C (100.9 F)
1990	36.7 C (98.1 F)
1991	35.0 C (95.0 F)
1992	36.7 C (98.1 F)
1993	36.7 C (98.1 F)
1994	37.8 C (100.0 F)
1995	38.3 C (100.9 F)
1996	35.6 C (96.1 F)
1997	37.2 C (99.0 F)
1998	38.3 C (100.9 F)
1999	36.1 C (97.0 F)
2000	34.4 C (93.9 F)
2001	36.1 C (97.0 F)
2002	37.8 C (100.0 F)
2003	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Clewiston, 1948 to 2003. The record is -3.3 C (26.1 F) in 1982, marked on the chart; the median year is 2.2 C (36.0 F).

Coldest night (TNn) at Clewiston by year
Year	Coldest night (TNn)
1948	n/a
1949	2.8 C (37.0 F)
1950	1.7 C (35.1 F)
1951	3.3 C (37.9 F)
1952	4.4 C (39.9 F)
1953	2.8 C (37.0 F)
1954	2.8 C (37.0 F)
1955	5.0 C (41.0 F)
1956	-0.6 C (30.9 F)
1957	5.0 C (41.0 F)
1958	0.6 C (33.1 F)
1959	0.0 C (32.0 F)
1960	0.0 C (32.0 F)
1961	2.2 C (36.0 F)
1962	-1.7 C (28.9 F)
1963	2.2 C (36.0 F)
1964	-0.6 C (30.9 F)
1965	0.0 C (32.0 F)
1966	2.2 C (36.0 F)
1967	-0.6 C (30.9 F)
1968	-1.1 C (30.0 F)
1969	4.4 C (39.9 F)
1970	0.0 C (32.0 F)
1971	0.6 C (33.1 F)
1972	1.7 C (35.1 F)
1973	2.2 C (36.0 F)
1974	2.2 C (36.0 F)
1975	3.3 C (37.9 F)
1976	2.2 C (36.0 F)
1977	-2.8 C (27.0 F)
1978	0.0 C (32.0 F)
1979	2.2 C (36.0 F)
1980	-1.7 C (28.9 F)
1981	-1.7 C (28.9 F)
1982	-3.3 C (26.1 F)
1983	-0.6 C (30.9 F)
1984	3.3 C (37.9 F)
1985	-1.1 C (30.0 F)
1986	-1.7 C (28.9 F)
1987	2.8 C (37.0 F)
1988	3.3 C (37.9 F)
1989	-3.3 C (26.1 F)
1990	5.6 C (42.1 F)
1991	3.9 C (39.0 F)
1992	5.6 C (42.1 F)
1993	5.6 C (42.1 F)
1994	5.6 C (42.1 F)
1995	1.7 C (35.1 F)
1996	-2.2 C (28.0 F)
1997	-2.8 C (27.0 F)
1998	5.6 C (42.1 F)
1999	2.8 C (37.0 F)
2000	4.4 C (39.9 F)
2001	4.4 C (39.9 F)
2002	0.6 C (33.1 F)
2003	0.6 C (33.1 F)

Wettest day (Rx1day)

The wettest day of the year at Clewiston, 1948 to 2003. The record is 243.8 mm (9.6 in) in 1982, marked on the chart; the median year is 78.8 mm (3.1 in).

Wettest day (Rx1day) at Clewiston by year
Year	Wettest day (Rx1day)
1948	167.9 mm (6.6 in)
1949	68.1 mm (2.7 in)
1950	139.7 mm (5.5 in)
1951	190.5 mm (7.5 in)
1952	72.4 mm (2.9 in)
1953	60.5 mm (2.4 in)
1954	113.8 mm (4.5 in)
1955	68.6 mm (2.7 in)
1956	43.2 mm (1.7 in)
1957	149.1 mm (5.9 in)
1958	94.2 mm (3.7 in)
1959	101.9 mm (4.0 in)
1960	89.9 mm (3.5 in)
1961	103.6 mm (4.1 in)
1962	73.2 mm (2.9 in)
1963	60.7 mm (2.4 in)
1964	108.7 mm (4.3 in)
1965	151.1 mm (5.9 in)
1966	70.1 mm (2.8 in)
1967	58.2 mm (2.3 in)
1968	72.4 mm (2.9 in)
1969	54.4 mm (2.1 in)
1970	125.2 mm (4.9 in)
1971	66.0 mm (2.6 in)
1972	111.8 mm (4.4 in)
1973	67.8 mm (2.7 in)
1974	148.1 mm (5.8 in)
1975	74.7 mm (2.9 in)
1976	81.8 mm (3.2 in)
1977	154.7 mm (6.1 in)
1978	73.4 mm (2.9 in)
1979	60.7 mm (2.4 in)
1980	69.1 mm (2.7 in)
1981	54.6 mm (2.1 in)
1982	243.8 mm (9.6 in)
1983	93.2 mm (3.7 in)
1984	103.6 mm (4.1 in)
1985	60.7 mm (2.4 in)
1986	86.4 mm (3.4 in)
1987	108.7 mm (4.3 in)
1988	112.5 mm (4.4 in)
1989	66.0 mm (2.6 in)
1990	60.2 mm (2.4 in)
1991	97.8 mm (3.9 in)
1992	84.1 mm (3.3 in)
1993	70.1 mm (2.8 in)
1994	75.7 mm (3.0 in)
1995	82.8 mm (3.3 in)
1996	61.7 mm (2.4 in)
1997	66.0 mm (2.6 in)
1998	144.3 mm (5.7 in)
1999	113.0 mm (4.4 in)
2000	74.2 mm (2.9 in)
2001	61.5 mm (2.4 in)
2002	96.3 mm (3.8 in)
2003	54.6 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Clewiston, 1948 to 2003. The record is 316.9 mm (12.5 in) in 1982, marked on the chart; the median year is 138.3 mm (5.4 in).

Wettest five days (Rx5day) at Clewiston by year
Year	Wettest five days (Rx5day)
1948	268.0 mm (10.6 in)
1949	149.8 mm (5.9 in)
1950	177.3 mm (7.0 in)
1951	236.9 mm (9.3 in)
1952	148.5 mm (5.8 in)
1953	127.0 mm (5.0 in)
1954	155.9 mm (6.1 in)
1955	137.7 mm (5.4 in)
1956	68.3 mm (2.7 in)
1957	189.7 mm (7.5 in)
1958	141.7 mm (5.6 in)
1959	191.5 mm (7.5 in)
1960	195.0 mm (7.7 in)
1961	212.1 mm (8.4 in)
1962	178.9 mm (7.0 in)
1963	67.9 mm (2.7 in)
1964	138.9 mm (5.5 in)
1965	227.3 mm (8.9 in)
1966	128.5 mm (5.1 in)
1967	108.4 mm (4.3 in)
1968	137.9 mm (5.4 in)
1969	104.2 mm (4.1 in)
1970	178.1 mm (7.0 in)
1971	141.5 mm (5.6 in)
1972	138.7 mm (5.5 in)
1973	80.0 mm (3.1 in)
1974	240.2 mm (9.5 in)
1975	150.2 mm (5.9 in)
1976	103.1 mm (4.1 in)
1977	202.2 mm (8.0 in)
1978	144.7 mm (5.7 in)
1979	117.3 mm (4.6 in)
1980	82.8 mm (3.3 in)
1981	86.6 mm (3.4 in)
1982	316.9 mm (12.5 in)
1983	161.6 mm (6.4 in)
1984	139.0 mm (5.5 in)
1985	114.5 mm (4.5 in)
1986	109.2 mm (4.3 in)
1987	162.5 mm (6.4 in)
1988	120.6 mm (4.7 in)
1989	132.1 mm (5.2 in)
1990	95.8 mm (3.8 in)
1991	105.9 mm (4.2 in)
1992	198.1 mm (7.8 in)
1993	118.7 mm (4.7 in)
1994	109.0 mm (4.3 in)
1995	112.5 mm (4.4 in)
1996	45.4 mm (1.8 in)
1997	125.4 mm (4.9 in)
1998	161.4 mm (6.4 in)
1999	149.6 mm (5.9 in)
2000	96.7 mm (3.8 in)
2001	98.4 mm (3.9 in)
2002	96.6 mm (3.8 in)
2003	123.4 mm (4.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Clewiston, 1948 to 2003. The record is 57 days in 1970, marked on the chart; the median year is 29 days.

Longest dry spell (CDD) at Clewiston by year
Year	Longest dry spell (CDD)
1948	19 days
1949	31 days
1950	27 days
1951	37 days
1952	25 days
1953	16 days
1954	18 days
1955	34 days
1956	30 days
1957	26 days
1958	23 days
1959	21 days
1960	29 days
1961	33 days
1962	25 days
1963	30 days
1964	27 days
1965	29 days
1966	18 days
1967	48 days
1968	49 days
1969	23 days
1970	57 days
1971	35 days
1972	19 days
1973	18 days
1974	35 days
1975	41 days
1976	32 days
1977	25 days
1978	25 days
1979	48 days
1980	19 days
1981	33 days
1982	26 days
1983	20 days
1984	49 days
1985	27 days
1986	26 days
1987	40 days
1988	29 days
1989	36 days
1990	46 days
1991	31 days
1992	35 days
1993	33 days
1994	19 days
1995	33 days
1996	22 days
1997	22 days
1998	24 days
1999	45 days
2000	38 days
2001	29 days
2002	25 days
2003	17 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

46 years, 1949 to 1994

A day with at least 82.5 mm (3.2 in) of rain is expected about once in 2 years. A day with at least 257.7 mm (10.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Clewiston: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	82.5 mm (3.2 in)
5 years	114.2 mm (4.5 in)
10 years	140.2 mm (5.5 in)
25 years	180.2 mm (7.1 in)
50 years	216.0 mm (8.5 in)	Longer than the 46 years of record
100 years	257.7 mm (10.1 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 1949 to 1994.

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: 243.8 mm (9.6 in) in 1982; 190.5 mm (7.5 in) in 1951; 154.7 mm (6.1 in) in 1977.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Clewiston, at 1986. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.2 C (0.4 F) lower than in the years before (likely change).

Suspected changes in the annual mean temperature at Clewiston, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1986	-0.2	-0.4	likely	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 Clewiston standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Clewiston 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).