Westhaven Weather Records (USC00049560)

Record envelope, standing records and threshold days for Westhaven (USC00049560), California, United States, with 75 years of record.

Key Facts for Westhaven

Westhaven (USC00049560) is a weather station in California, United States at 36.23 latitude and -120.00 longitude, 87 m (285 ft) above sea level.
The station reports from 1925 to 1999, 75 years of record.
1,464 records set at Westhaven still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Westhaven set a daily record precipitation of 10.7 mm (0.4 in) on 24 October 1998.

About the Station

Location: California, United States, 36.23 latitude, -120.00 longitude.
Elevation: 87 m (285 ft).
Period of record: 1925 to 1999, 75 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 Westhaven. 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 Westhaven, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	26.1 C (79.0 F)	-8.3 C (17.1 F)	n/a	n/a
Feb	32.2 C (90.0 F)	-6.1 C (21.0 F)	n/a	n/a
Mar	37.2 C (99.0 F)	-2.2 C (28.0 F)	n/a	n/a
Apr	38.9 C (102.0 F)	-3.3 C (26.1 F)	n/a	n/a
May	42.8 C (109.0 F)	0.6 C (33.1 F)	n/a	n/a
Jun	46.1 C (115.0 F)	4.4 C (39.9 F)	n/a	n/a
Jul	51.1 C (124.0 F)	10.0 C (50.0 F)	n/a	n/a
Aug	48.9 C (120.0 F)	6.7 C (44.1 F)	n/a	n/a
Sep	45.6 C (114.1 F)	3.3 C (37.9 F)	n/a	n/a
Oct	39.4 C (102.9 F)	-2.2 C (28.0 F)	n/a	n/a
Nov	33.9 C (93.0 F)	-7.8 C (18.0 F)	n/a	n/a
Dec	27.2 C (81.0 F)	-8.9 C (16.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Westhaven still stand. 1931 holds the most, with 97.

Standing records at Westhaven by the year they were set
Year set	Standing records
1926	74
1927	65
1928	79
1929	76
1930	65
1931	97
1932	73
1933	70
1934	65
1935	72
1936	36
1937	49
1938	45
1939	56
1940	59
1941	69
1942	65
1943	46
1944	63
1945	44
1946	80
1947	76
1948	24
1964	4
1970	6
1975	1
1976	5

All-Time Record Progression

5 new records

5 all-time records were set at Westhaven between 20 January 1969 and 29 October 1996. Each dot is a new record.

When Westhaven set new all-time records
Date	Kind	Detail
1969-01-20	Record daily precipitation	Record daily precipitation 46.5 mm (1.8 in)
1977-12-28	Record daily precipitation	Record daily precipitation 47.5 mm (1.9 in)
1978-02-10	Record daily precipitation	Record daily precipitation 50.3 mm (2.0 in)
1995-03-10	Record daily precipitation	Record daily precipitation 51.1 mm (2.0 in)
1996-10-29	Record daily precipitation	Record daily precipitation 51.3 mm (2.0 in)

Wettest Day of Each Month

Oct: 51.3 mm (2.0 in)

The wettest day on record for each calendar month at Westhaven. The most was 51.3 mm (2.0 in) on 29 October 1996.

Record daily precipitation for each month at Westhaven
Month	Record daily precipitation (mm)	Date
Jan	46.5 mm (1.8 in)	20 January 1969
Feb	50.3 mm (2.0 in)	10 February 1978
Mar	51.1 mm (2.0 in)	10 March 1995
Apr	23.1 mm (0.9 in)	25 April 1938
May	36.8 mm (1.4 in)	12 May 1958
Jun	27.4 mm (1.1 in)	7 June 1931
Jul	7.4 mm (0.29 in)	31 July 1966
Aug	5.1 mm (0.20 in)	20 August 1983
Sep	31.2 mm (1.2 in)	5 September 1978
Oct	51.3 mm (2.0 in)	29 October 1996
Nov	27.9 mm (1.1 in)	11 November 1985
Dec	47.5 mm (1.9 in)	28 December 1977

Period of Record Coverage

1926 to 1976

28 years of record at Westhaven, 1926 to 1976. 12 years have data for under 90 percent of days and are left out of rankings: 1926, 1928, 1932, 1936, 1942, 1945, 1948, 1964 and others.

Days with data per year at Westhaven
Year	Days with data	Share of year	Complete
1926	312	85%	No
1927	352	96%	Yes
1928	313	86%	No
1929	330	90%	Yes
1930	353	97%	Yes
1931	364	100%	Yes
1932	208	57%	No
1933	365	100%	Yes
1934	365	100%	Yes
1935	363	99%	Yes
1936	313	86%	No
1937	364	100%	Yes
1938	365	100%	Yes
1939	350	96%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	321	88%	No
1943	365	100%	Yes
1944	365	100%	Yes
1945	216	59%	No
1946	334	92%	Yes
1947	334	92%	Yes
1948	178	49%	No
1964	30	8%	No
1968	1	0%	No
1970	62	17%	No
1975	30	8%	No
1976	31	8%	No

Latest Records

Latest records at Westhaven
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
24 October 1998	Westhaven, US	daily rain	10.7 mm (0.4 in)	8.9 mm (0.35 in)	47 years	20 of 100 (Routine)
4 September 1998	Westhaven, US	daily rain	3.0 mm (0.12 in)	3.0 mm (0.12 in)	72 years	20 of 100 (Routine)
13 May 1998	Westhaven, US	daily rain	5.1 mm (0.20 in)	2.1 mm (0.08 in)	29 years	19 of 100 (Routine)
6 May 1998	Westhaven, US	daily rain	22.6 mm (0.9 in)	12.7 mm (0.5 in)	4 years	20 of 100 (Routine)
5 May 1998	Westhaven, US	daily rain	26.9 mm (1.1 in)	13.7 mm (0.5 in)	3 years	33 of 100 (Routine)
4 May 1998	Westhaven, US	daily rain	9.9 mm (0.39 in)	4.3 mm (0.17 in)	27 years	20 of 100 (Routine)
25 March 1998	Westhaven, US	daily rain	45.7 mm (1.8 in)	18.0 mm (0.7 in)	48 years	47 of 100 (Notable)
9 February 1998	Westhaven, US	daily rain	15.5 mm (0.6 in)	1.8 mm (0.07 in)	56 years	20 of 100 (Routine)
3 February 1998	Westhaven, US	daily rain	24.4 mm (1.0 in)	5.6 mm (0.22 in)	52 years	20 of 100 (Routine)
10 October 1997	Westhaven, US	daily rain	2.3 mm (0.09 in)	0.5 mm (0.02 in)	50 years	20 of 100 (Routine)
2 September 1997	Westhaven, US	daily rain	5.6 mm (0.22 in)	5.6 mm (0.22 in)	71 years	20 of 100 (Routine)
22 March 1997	Westhaven, US	daily rain	11.7 mm (0.5 in)	3.8 mm (0.15 in)	39 years	20 of 100 (Routine)
13 January 1997	Westhaven, US	daily rain	15.2 mm (0.6 in)	0.5 mm (0.02 in)	40 years	19 of 100 (Routine)
9 December 1996	Westhaven, US	daily rain	21.1 mm (0.8 in)	18.8 mm (0.7 in)	65 years	20 of 100 (Routine)
29 October 1996	Westhaven, US	all-time rain	51.3 mm (2.0 in)	0.2 mm (0.01 in)	1 year	27 of 100 (Routine)
13 March 1996	Westhaven, US	daily rain	24.6 mm (1.0 in)	13.4 mm (0.5 in)	29 years	20 of 100 (Routine)
31 January 1996	Westhaven, US	daily rain	14.7 mm (0.6 in)	2.5 mm (0.10 in)	64 years	20 of 100 (Routine)
15 June 1995	Westhaven, US	daily rain	1.8 mm (0.07 in)	1.8 mm (0.07 in)	68 years	20 of 100 (Routine)
15 May 1995	Westhaven, US	daily rain	6.9 mm (0.27 in)	6.9 mm (0.27 in)	68 years	20 of 100 (Routine)
14 May 1995	Westhaven, US	daily rain	6.1 mm (0.24 in)	0.3 mm (0.01 in)	45 years	20 of 100 (Routine)

Climate Trend

12 complete years, 1927 to 1944

One stripe for each of 12 complete years at Westhaven, 1927 to 1944. Blue stripes are years cooler than the station's own mean of 17.4 C (63.3 F); red stripes are warmer. The coolest year was 1941, at 15.7 C (60.2 F), and the warmest was 1939, at 18.8 C (65.9 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Westhaven as warming stripes, 1927 to 1944
Year	Annual mean temperature	Difference from the station mean
1927	17.8 C	+0.41 C
1929	17.7 C	+0.29 C
1933	16.9 C	-0.48 C
1934	18.1 C	+0.74 C
1935	16.5 C	-0.87 C
1937	17.8 C	+0.38 C
1938	17.8 C	+0.39 C
1939	18.8 C	+1.45 C
1940	18.2 C	+0.81 C
1941	15.7 C	-1.73 C
1943	16.9 C	-0.46 C
1944	16.4 C	-0.96 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1925 to 1999

Yearly extremes at Westhaven: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	51.1 C (124.0 F)	1931	44.4 C (111.9 F)	28
Coldest night (TNn)	-8.9 C (16.0 F)	1930	-5.3 C (22.5 F)	28
Wettest day (Rx1day)	51.3 mm (2.0 in)	1996	23.1 mm (0.9 in)	75
Wettest five days (Rx5day)	94.8 mm (3.7 in)	1995	34.8 mm (1.4 in)	75
Longest dry spell (CDD)	225 days	1937	148 days	75

Hottest day (TXx)

The hottest day of the year at Westhaven, 1925 to 1999. The record is 51.1 C (124.0 F) in 1931, marked on the chart; the median year is 44.4 C (111.9 F).

Hottest day (TXx) at Westhaven by year
Year	Hottest day (TXx)
1925	n/a
1926	46.1 C (115.0 F)
1927	45.0 C (113.0 F)
1928	46.7 C (116.1 F)
1929	46.1 C (115.0 F)
1930	46.1 C (115.0 F)
1931	51.1 C (124.0 F)
1932	38.9 C (102.0 F)
1933	48.3 C (118.9 F)
1934	44.4 C (111.9 F)
1935	44.4 C (111.9 F)
1936	45.6 C (114.1 F)
1937	44.4 C (111.9 F)
1938	45.6 C (114.1 F)
1939	45.6 C (114.1 F)
1940	45.0 C (113.0 F)
1941	42.8 C (109.0 F)
1942	45.0 C (113.0 F)
1943	43.9 C (111.0 F)
1944	43.3 C (109.9 F)
1945	47.8 C (118.0 F)
1946	44.4 C (111.9 F)
1947	42.8 C (109.0 F)
1948	43.3 C (109.9 F)
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	21.7 C (71.1 F)
1965	n/a
1966	n/a
1967	n/a
1968	15.6 C (60.1 F)
1969	n/a
1970	40.0 C (104.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	19.4 C (66.9 F)
1976	21.1 C (70.0 F)
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

Coldest night (TNn)

The coldest night of the year at Westhaven, 1925 to 1999. The record is -8.9 C (16.0 F) in 1930, marked on the chart; the median year is -5.3 C (22.5 F).

Coldest night (TNn) at Westhaven by year
Year	Coldest night (TNn)
1925	n/a
1926	-3.3 C (26.1 F)
1927	-5.0 C (23.0 F)
1928	-6.1 C (21.0 F)
1929	-3.3 C (26.1 F)
1930	-8.9 C (16.0 F)
1931	-6.7 C (19.9 F)
1932	-7.2 C (19.0 F)
1933	-6.1 C (21.0 F)
1934	-2.2 C (28.0 F)
1935	-6.7 C (19.9 F)
1936	-4.4 C (24.1 F)
1937	-6.7 C (19.9 F)
1938	-3.3 C (26.1 F)
1939	-2.8 C (27.0 F)
1940	-8.9 C (16.0 F)
1941	-4.4 C (24.1 F)
1942	-6.1 C (21.0 F)
1943	-8.3 C (17.1 F)
1944	-3.9 C (25.0 F)
1945	-7.8 C (18.0 F)
1946	-7.8 C (18.0 F)
1947	-7.8 C (18.0 F)
1948	-5.6 C (21.9 F)
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	-2.8 C (27.0 F)
1965	n/a
1966	n/a
1967	n/a
1968	0.6 C (33.1 F)
1969	n/a
1970	1.1 C (34.0 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	-4.4 C (24.1 F)
1976	-4.4 C (24.1 F)
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

Wettest day (Rx1day)

The wettest day of the year at Westhaven, 1925 to 1999. The record is 51.3 mm (2.0 in) in 1996, marked on the chart; the median year is 23.1 mm (0.9 in).

Wettest day (Rx1day) at Westhaven by year
Year	Wettest day (Rx1day)
1925	0.0 mm (0.00 in)
1926	22.6 mm (0.9 in)
1927	24.1 mm (0.9 in)
1928	13.2 mm (0.5 in)
1929	18.8 mm (0.7 in)
1930	19.1 mm (0.8 in)
1931	27.4 mm (1.1 in)
1932	10.2 mm (0.4 in)
1933	36.1 mm (1.4 in)
1934	19.3 mm (0.8 in)
1935	25.9 mm (1.0 in)
1936	29.2 mm (1.1 in)
1937	15.0 mm (0.6 in)
1938	37.3 mm (1.5 in)
1939	20.6 mm (0.8 in)
1940	33.5 mm (1.3 in)
1941	25.4 mm (1.0 in)
1942	23.1 mm (0.9 in)
1943	15.5 mm (0.6 in)
1944	40.9 mm (1.6 in)
1945	13.2 mm (0.5 in)
1946	26.4 mm (1.0 in)
1947	8.9 mm (0.35 in)
1948	19.1 mm (0.8 in)
1949	20.3 mm (0.8 in)
1950	27.7 mm (1.1 in)
1951	10.9 mm (0.4 in)
1952	23.6 mm (0.9 in)
1953	19.3 mm (0.8 in)
1954	18.0 mm (0.7 in)
1955	25.9 mm (1.0 in)
1956	26.4 mm (1.0 in)
1957	18.5 mm (0.7 in)
1958	36.8 mm (1.4 in)
1959	29.7 mm (1.2 in)
1960	16.5 mm (0.6 in)
1961	29.0 mm (1.1 in)
1962	27.9 mm (1.1 in)
1963	32.8 mm (1.3 in)
1964	18.5 mm (0.7 in)
1965	17.8 mm (0.7 in)
1966	24.9 mm (1.0 in)
1967	11.2 mm (0.4 in)
1968	19.1 mm (0.8 in)
1969	46.5 mm (1.8 in)
1970	15.5 mm (0.6 in)
1971	13.7 mm (0.5 in)
1972	17.5 mm (0.7 in)
1973	23.6 mm (0.9 in)
1974	21.3 mm (0.8 in)
1975	14.5 mm (0.6 in)
1976	31.0 mm (1.2 in)
1977	47.5 mm (1.9 in)
1978	50.3 mm (2.0 in)
1979	15.2 mm (0.6 in)
1980	38.6 mm (1.5 in)
1981	24.1 mm (0.9 in)
1982	21.6 mm (0.9 in)
1983	30.0 mm (1.2 in)
1984	11.2 mm (0.4 in)
1985	27.9 mm (1.1 in)
1986	15.7 mm (0.6 in)
1987	25.7 mm (1.0 in)
1988	17.3 mm (0.7 in)
1989	14.5 mm (0.6 in)
1990	21.8 mm (0.9 in)
1991	37.3 mm (1.5 in)
1992	28.2 mm (1.1 in)
1993	31.0 mm (1.2 in)
1994	24.6 mm (1.0 in)
1995	51.1 mm (2.0 in)
1996	51.3 mm (2.0 in)
1997	16.5 mm (0.6 in)
1998	45.7 mm (1.8 in)
1999	19.1 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Westhaven, 1925 to 1999. The record is 94.8 mm (3.7 in) in 1995, marked on the chart; the median year is 34.8 mm (1.4 in).

Wettest five days (Rx5day) at Westhaven by year
Year	Wettest five days (Rx5day)
1925	0.0 mm (0.00 in)
1926	68.8 mm (2.7 in)
1927	42.7 mm (1.7 in)
1928	26.6 mm (1.0 in)
1929	22.1 mm (0.9 in)
1930	28.2 mm (1.1 in)
1931	42.4 mm (1.7 in)
1932	22.1 mm (0.9 in)
1933	50.3 mm (2.0 in)
1934	34.3 mm (1.4 in)
1935	32.7 mm (1.3 in)
1936	55.6 mm (2.2 in)
1937	26.2 mm (1.0 in)
1938	66.3 mm (2.6 in)
1939	20.6 mm (0.8 in)
1940	68.1 mm (2.7 in)
1941	50.2 mm (2.0 in)
1942	26.9 mm (1.1 in)
1943	41.6 mm (1.6 in)
1944	65.7 mm (2.6 in)
1945	30.7 mm (1.2 in)
1946	34.8 mm (1.4 in)
1947	14.2 mm (0.6 in)
1948	19.1 mm (0.8 in)
1949	36.2 mm (1.4 in)
1950	37.4 mm (1.5 in)
1951	18.3 mm (0.7 in)
1952	44.9 mm (1.8 in)
1953	25.7 mm (1.0 in)
1954	23.6 mm (0.9 in)
1955	61.7 mm (2.4 in)
1956	29.7 mm (1.2 in)
1957	23.1 mm (0.9 in)
1958	36.8 mm (1.4 in)
1959	33.8 mm (1.3 in)
1960	22.3 mm (0.9 in)
1961	35.1 mm (1.4 in)
1962	83.7 mm (3.3 in)
1963	51.3 mm (2.0 in)
1964	21.3 mm (0.8 in)
1965	37.8 mm (1.5 in)
1966	52.3 mm (2.1 in)
1967	19.0 mm (0.7 in)
1968	23.2 mm (0.9 in)
1969	75.1 mm (3.0 in)
1970	22.1 mm (0.9 in)
1971	18.2 mm (0.7 in)
1972	34.0 mm (1.3 in)
1973	46.4 mm (1.8 in)
1974	23.4 mm (0.9 in)
1975	25.4 mm (1.0 in)
1976	53.3 mm (2.1 in)
1977	54.7 mm (2.2 in)
1978	93.3 mm (3.7 in)
1979	23.1 mm (0.9 in)
1980	73.0 mm (2.9 in)
1981	37.8 mm (1.5 in)
1982	32.0 mm (1.3 in)
1983	68.7 mm (2.7 in)
1984	26.7 mm (1.1 in)
1985	32.7 mm (1.3 in)
1986	37.8 mm (1.5 in)
1987	45.0 mm (1.8 in)
1988	46.3 mm (1.8 in)
1989	22.1 mm (0.9 in)
1990	34.5 mm (1.4 in)
1991	79.0 mm (3.1 in)
1992	66.3 mm (2.6 in)
1993	59.5 mm (2.3 in)
1994	25.4 mm (1.0 in)
1995	94.8 mm (3.7 in)
1996	52.8 mm (2.1 in)
1997	32.0 mm (1.3 in)
1998	64.8 mm (2.6 in)
1999	34.6 mm (1.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Westhaven, 1925 to 1999. The record is 225 days in 1937, marked on the chart; the median year is 148 days.

Longest dry spell (CDD) at Westhaven by year
Year	Longest dry spell (CDD)
1925	9 days
1926	165 days
1927	198 days
1928	189 days
1929	103 days
1930	135 days
1931	155 days
1932	208 days
1933	147 days
1934	134 days
1935	154 days
1936	64 days
1937	225 days
1938	99 days
1939	137 days
1940	146 days
1941	111 days
1942	186 days
1943	195 days
1944	136 days
1945	123 days
1946	126 days
1947	134 days
1948	133 days
1949	130 days
1950	130 days
1951	160 days
1952	174 days
1953	142 days
1954	156 days
1955	156 days
1956	138 days
1957	87 days
1958	55 days
1959	212 days
1960	160 days
1961	196 days
1962	205 days
1963	99 days
1964	117 days
1965	186 days
1966	98 days
1967	166 days
1968	152 days
1969	115 days
1970	125 days
1971	167 days
1972	205 days
1973	195 days
1974	182 days
1975	146 days
1976	127 days
1977	148 days
1978	131 days
1979	170 days
1980	132 days
1981	143 days
1982	164 days
1983	100 days
1984	174 days
1985	166 days
1986	169 days
1987	213 days
1988	177 days
1989	129 days
1990	117 days
1991	189 days
1992	191 days
1993	138 days
1994	133 days
1995	178 days
1996	166 days
1997	163 days
1998	88 days
1999	171 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

72 years, 1926 to 1998

A day with at least 23.0 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 59.5 mm (2.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Westhaven: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	23.0 mm (0.9 in)
5 years	32.3 mm (1.3 in)
10 years	38.7 mm (1.5 in)
25 years	46.9 mm (1.8 in)
50 years	53.2 mm (2.1 in)
100 years	59.5 mm (2.3 in)	Longer than the 72 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, 72 years of values from 1926 to 1998.

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: 51.3 mm (2.0 in) in 1996; 51.1 mm (2.0 in) in 1995; 50.3 mm (2.0 in) in 1978.

Download the Data

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