Kopiluila Weather Records (USC00514771)

Record envelope, standing records and threshold days for Kopiluila (USC00514771), Hawaii, United States, with 33 years of record.

Key Facts for Kopiluila

Kopiluila (USC00514771) is a weather station in Hawaii, United States at 20.80 latitude and -156.15 longitude, 372 m (1,220 ft) above sea level.
The station reports from 1905 to 1937, 33 years of record.
1,464 records set at Kopiluila still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Kopiluila set a daily record precipitation of 132.8 mm (5.2 in) on 29 December 1937.

About the Station

Location: Hawaii, United States, 20.80 latitude, -156.15 longitude.
Elevation: 372 m (1,220 ft).
Period of record: 1905 to 1937, 33 years.
Eligible elements: prcp.

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 Kopiluila. 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 Kopiluila, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.0 C (86.0 F)	11.1 C (52.0 F)	n/a	n/a
Feb	27.8 C (82.0 F)	10.0 C (50.0 F)	n/a	n/a
Mar	29.4 C (84.9 F)	10.0 C (50.0 F)	n/a	n/a
Apr	28.9 C (84.0 F)	12.2 C (54.0 F)	n/a	n/a
May	28.9 C (84.0 F)	13.9 C (57.0 F)	n/a	n/a
Jun	30.0 C (86.0 F)	14.4 C (57.9 F)	n/a	n/a
Jul	27.8 C (82.0 F)	15.0 C (59.0 F)	n/a	n/a
Aug	28.3 C (82.9 F)	16.1 C (61.0 F)	n/a	n/a
Sep	28.9 C (84.0 F)	13.3 C (55.9 F)	n/a	n/a
Oct	29.4 C (84.9 F)	13.9 C (57.0 F)	n/a	n/a
Nov	27.2 C (81.0 F)	12.2 C (54.0 F)	n/a	n/a
Dec	27.8 C (82.0 F)	10.0 C (50.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Kopiluila still stand. 1905 holds the most, with 142.

Standing records at Kopiluila by the year they were set
Year set	Standing records
1905	142
1906	73
1907	75
1908	90
1909	65
1910	94
1911	87
1912	46
1913	35
1914	69
1915	66
1916	85
1917	48
1918	77
1919	36
1920	25
1921	58
1922	59
1923	31
1924	39
1925	31
1926	40
1927	35
1928	17
1929	41

Wettest Day of Each Month

Apr: 500.1 mm (19.7 in)

The wettest day on record for each calendar month at Kopiluila. The most was 500.1 mm (19.7 in) on 27 April 1915.

Record daily precipitation for each month at Kopiluila
Month	Record daily precipitation (mm)	Date
Jan	423.9 mm (16.7 in)	31 January 1922
Feb	263.9 mm (10.4 in)	7 February 1932
Mar	496.6 mm (19.6 in)	11 March 1909
Apr	500.1 mm (19.7 in)	27 April 1915
May	287.0 mm (11.3 in)	4 May 1914
Jun	129.5 mm (5.1 in)	6 June 1935
Jul	192.8 mm (7.6 in)	10 July 1918
Aug	314.7 mm (12.4 in)	15 August 1907
Sep	250.2 mm (9.9 in)	23 September 1914
Oct	137.9 mm (5.4 in)	18 October 1935
Nov	444.8 mm (17.5 in)	21 November 1924
Dec	395.2 mm (15.6 in)	6 December 1910

Period of Record Coverage

1905 to 1929

25 years of record at Kopiluila, 1905 to 1929. Every year has data for at least 90 percent of its days.

Days with data per year at Kopiluila
Year	Days with data	Share of year	Complete
1905	340	93%	Yes
1906	365	100%	Yes
1907	365	100%	Yes
1908	366	100%	Yes
1909	365	100%	Yes
1910	335	92%	Yes
1911	365	100%	Yes
1912	366	100%	Yes
1913	364	100%	Yes
1914	364	100%	Yes
1915	363	99%	Yes
1916	352	96%	Yes
1917	349	96%	Yes
1918	362	99%	Yes
1919	364	100%	Yes
1920	365	100%	Yes
1921	363	99%	Yes
1922	364	100%	Yes
1923	364	100%	Yes
1924	355	97%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	361	99%	Yes

Latest Records

Latest records at Kopiluila
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 December 1937	Kopiluila, US	daily rain	132.8 mm (5.2 in)	60.4 mm (2.4 in)	0 years	18 of 100 (Routine)
15 December 1937	Kopiluila, US	daily rain	43.4 mm (1.7 in)	0.2 mm (0.01 in)	23 years	9 of 100 (Routine)
25 November 1937	Kopiluila, US	daily rain	128.5 mm (5.1 in)	38.6 mm (1.5 in)	15 years	17 of 100 (Routine)
25 October 1937	Kopiluila, US	daily rain	65.5 mm (2.6 in)	6.3 mm (0.25 in)	16 years	11 of 100 (Routine)
8 October 1937	Kopiluila, US	daily rain	53.3 mm (2.1 in)	5.5 mm (0.22 in)	24 years	13 of 100 (Routine)
5 October 1937	Kopiluila, US	daily rain	54.4 mm (2.1 in)	3.6 mm (0.14 in)	23 years	10 of 100 (Routine)
3 August 1937	Kopiluila, US	daily rain	86.4 mm (3.4 in)	29.5 mm (1.2 in)	20 years	21 of 100 (Routine)
2 August 1937	Kopiluila, US	daily rain	84.6 mm (3.3 in)	3.6 mm (0.14 in)	32 years	13 of 100 (Routine)
24 May 1937	Kopiluila, US	daily rain	34.3 mm (1.4 in)	0.5 mm (0.02 in)	27 years	11 of 100 (Routine)
21 May 1937	Kopiluila, US	daily rain	54.1 mm (2.1 in)	5.3 mm (0.21 in)	26 years	12 of 100 (Routine)
7 May 1937	Kopiluila, US	daily rain	120.7 mm (4.8 in)	46.5 mm (1.8 in)	23 years	29 of 100 (Routine)
3 May 1937	Kopiluila, US	daily rain	82.8 mm (3.3 in)	7.9 mm (0.31 in)	28 years	14 of 100 (Routine)
21 March 1937	Kopiluila, US	daily rain	123.2 mm (4.9 in)	26.4 mm (1.0 in)	16 years	16 of 100 (Routine)
20 March 1937	Kopiluila, US	daily rain	155.7 mm (6.1 in)	43.4 mm (1.7 in)	16 years	22 of 100 (Routine)
19 March 1937	Kopiluila, US	daily rain	66.8 mm (2.6 in)	7.4 mm (0.29 in)	28 years	13 of 100 (Routine)
10 March 1937	Kopiluila, US	daily rain	101.1 mm (4.0 in)	37.6 mm (1.5 in)	19 years	20 of 100 (Routine)
8 March 1937	Kopiluila, US	daily rain	207.8 mm (8.2 in)	137.2 mm (5.4 in)	20 years	49 of 100 (Notable)
7 March 1937	Kopiluila, US	daily rain	190.0 mm (7.5 in)	72.9 mm (2.9 in)	4 years	27 of 100 (Routine)
19 February 1937	Kopiluila, US	daily rain	123.7 mm (4.9 in)	56.9 mm (2.2 in)	8 years	20 of 100 (Routine)
18 February 1937	Kopiluila, US	daily rain	88.9 mm (3.5 in)	15.5 mm (0.6 in)	11 years	10 of 100 (Routine)

Climate Trend

22 complete years, 1906 to 1929

One stripe for each of 22 complete years at Kopiluila, 1906 to 1929. Blue stripes are years cooler than the station's own mean of 20.2 C (68.3 F); red stripes are warmer. The coolest year was 1908, at 19.4 C (67.0 F), and the warmest was 1926, at 20.9 C (69.6 F). The strongest colour marks a difference of 0.8 C (1.4 F).

Annual mean temperature at Kopiluila as warming stripes, 1906 to 1929
Year	Annual mean temperature	Difference from the station mean
1906	20.3 C	+0.11 C
1907	20.1 C	-0.11 C
1908	19.4 C	-0.73 C
1909	19.5 C	-0.65 C
1911	19.5 C	-0.65 C
1912	19.7 C	-0.46 C
1913	20.2 C	-0.01 C
1914	19.7 C	-0.46 C
1915	20.0 C	-0.19 C
1916	20.0 C	-0.22 C
1918	20.4 C	+0.23 C
1919	20.2 C	+0.07 C
1920	20.3 C	+0.12 C
1921	20.4 C	+0.20 C
1922	20.8 C	+0.59 C
1923	20.5 C	+0.32 C
1924	20.3 C	+0.15 C
1925	20.5 C	+0.34 C
1926	20.9 C	+0.71 C
1927	20.6 C	+0.40 C
1928	20.1 C	-0.06 C
1929	20.5 C	+0.34 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

1905 to 1937

Yearly extremes at Kopiluila: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	30.0 C (86.0 F)	1905	28.3 C (82.9 F)	25
Coldest night (TNn)	10.0 C (50.0 F)	1915	12.2 C (54.0 F)	25
Wettest day (Rx1day)	500.1 mm (19.7 in)	1915	259.8 mm (10.2 in)	33
Wettest five days (Rx5day)	869.2 mm (34.2 in)	1918	506.3 mm (19.9 in)	33
Longest dry spell (CDD)	20 days	1924	8 days	33

Hottest day (TXx)

The hottest day of the year at Kopiluila, 1905 to 1937. The record is 30.0 C (86.0 F) in 1905, marked on the chart; the median year is 28.3 C (82.9 F).

Hottest day (TXx) at Kopiluila by year
Year	Hottest day (TXx)
1905	30.0 C (86.0 F)
1906	29.4 C (84.9 F)
1907	27.8 C (82.0 F)
1908	26.1 C (79.0 F)
1909	26.1 C (79.0 F)
1910	28.9 C (84.0 F)
1911	26.7 C (80.1 F)
1912	27.8 C (82.0 F)
1913	28.3 C (82.9 F)
1914	26.7 C (80.1 F)
1915	28.3 C (82.9 F)
1916	28.3 C (82.9 F)
1917	29.4 C (84.9 F)
1918	28.9 C (84.0 F)
1919	27.2 C (81.0 F)
1920	27.2 C (81.0 F)
1921	28.3 C (82.9 F)
1922	27.8 C (82.0 F)
1923	27.2 C (81.0 F)
1924	30.0 C (86.0 F)
1925	27.8 C (82.0 F)
1926	28.3 C (82.9 F)
1927	28.9 C (84.0 F)
1928	27.2 C (81.0 F)
1929	28.3 C (82.9 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

Coldest night (TNn)

The coldest night of the year at Kopiluila, 1905 to 1937. The record is 10.0 C (50.0 F) in 1915, marked on the chart; the median year is 12.2 C (54.0 F).

Coldest night (TNn) at Kopiluila by year
Year	Coldest night (TNn)
1905	10.6 C (51.1 F)
1906	11.1 C (52.0 F)
1907	12.8 C (55.0 F)
1908	11.7 C (53.1 F)
1909	12.2 C (54.0 F)
1910	12.2 C (54.0 F)
1911	11.7 C (53.1 F)
1912	11.7 C (53.1 F)
1913	12.2 C (54.0 F)
1914	11.7 C (53.1 F)
1915	10.0 C (50.0 F)
1916	10.0 C (50.0 F)
1917	11.7 C (53.1 F)
1918	12.2 C (54.0 F)
1919	12.8 C (55.0 F)
1920	12.8 C (55.0 F)
1921	13.3 C (55.9 F)
1922	12.2 C (54.0 F)
1923	10.0 C (50.0 F)
1924	10.0 C (50.0 F)
1925	13.3 C (55.9 F)
1926	12.8 C (55.0 F)
1927	12.8 C (55.0 F)
1928	12.8 C (55.0 F)
1929	12.2 C (54.0 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

Wettest day (Rx1day)

The wettest day of the year at Kopiluila, 1905 to 1937. The record is 500.1 mm (19.7 in) in 1915, marked on the chart; the median year is 259.8 mm (10.2 in).

Wettest day (Rx1day) at Kopiluila by year
Year	Wettest day (Rx1day)
1905	152.9 mm (6.0 in)
1906	348.5 mm (13.7 in)
1907	314.7 mm (12.4 in)
1908	164.8 mm (6.5 in)
1909	496.6 mm (19.6 in)
1910	395.2 mm (15.6 in)
1911	200.7 mm (7.9 in)
1912	267.2 mm (10.5 in)
1913	133.9 mm (5.3 in)
1914	287.0 mm (11.3 in)
1915	500.1 mm (19.7 in)
1916	280.7 mm (11.1 in)
1917	161.5 mm (6.4 in)
1918	444.2 mm (17.5 in)
1919	129.5 mm (5.1 in)
1920	123.7 mm (4.9 in)
1921	334.5 mm (13.2 in)
1922	423.9 mm (16.7 in)
1923	248.4 mm (9.8 in)
1924	444.8 mm (17.5 in)
1925	117.3 mm (4.6 in)
1926	230.4 mm (9.1 in)
1927	279.4 mm (11.0 in)
1928	168.1 mm (6.6 in)
1929	280.2 mm (11.0 in)
1930	269.5 mm (10.6 in)
1931	130.6 mm (5.1 in)
1932	263.9 mm (10.4 in)
1933	193.0 mm (7.6 in)
1934	115.8 mm (4.6 in)
1935	259.8 mm (10.2 in)
1936	259.1 mm (10.2 in)
1937	207.8 mm (8.2 in)

Wettest five days (Rx5day)

The wettest five days of the year at Kopiluila, 1905 to 1937. The record is 869.2 mm (34.2 in) in 1918, marked on the chart; the median year is 506.3 mm (19.9 in).

Wettest five days (Rx5day) at Kopiluila by year
Year	Wettest five days (Rx5day)
1905	249.7 mm (9.8 in)
1906	445.0 mm (17.5 in)
1907	625.6 mm (24.6 in)
1908	416.2 mm (16.4 in)
1909	363.7 mm (14.3 in)
1910	857.9 mm (33.8 in)
1911	363.5 mm (14.3 in)
1912	444.5 mm (17.5 in)
1913	350.2 mm (13.8 in)
1914	551.7 mm (21.7 in)
1915	683.5 mm (26.9 in)
1916	551.5 mm (21.7 in)
1917	282.2 mm (11.1 in)
1918	869.2 mm (34.2 in)
1919	237.0 mm (9.3 in)
1920	506.3 mm (19.9 in)
1921	720.5 mm (28.4 in)
1922	760.9 mm (30.0 in)
1923	584.7 mm (23.0 in)
1924	518.7 mm (20.4 in)
1925	258.6 mm (10.2 in)
1926	276.4 mm (10.9 in)
1927	582.0 mm (22.9 in)
1928	356.6 mm (14.0 in)
1929	538.8 mm (21.2 in)
1930	638.0 mm (25.1 in)
1931	288.9 mm (11.4 in)
1932	735.9 mm (29.0 in)
1933	449.1 mm (17.7 in)
1934	338.5 mm (13.3 in)
1935	764.0 mm (30.1 in)
1936	459.0 mm (18.1 in)
1937	588.3 mm (23.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Kopiluila, 1905 to 1937. The record is 20 days in 1924, marked on the chart; the median year is 8 days.

Longest dry spell (CDD) at Kopiluila by year
Year	Longest dry spell (CDD)
1905	10 days
1906	10 days
1907	9 days
1908	9 days
1909	15 days
1910	9 days
1911	6 days
1912	14 days
1913	5 days
1914	11 days
1915	8 days
1916	4 days
1917	14 days
1918	7 days
1919	9 days
1920	8 days
1921	13 days
1922	6 days
1923	7 days
1924	20 days
1925	11 days
1926	7 days
1927	8 days
1928	4 days
1929	8 days
1930	9 days
1931	8 days
1932	7 days
1933	7 days
1934	7 days
1935	9 days
1936	6 days
1937	10 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

33 years, 1905 to 1937

A day with at least 243.9 mm (9.6 in) of rain is expected about once in 2 years. A day with at least 617.5 mm (24.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Kopiluila: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	243.9 mm (9.6 in)
5 years	348.3 mm (13.7 in)
10 years	415.6 mm (16.4 in)
25 years	498.7 mm (19.6 in)
50 years	558.9 mm (22.0 in)	Longer than the 33 years of record
100 years	617.5 mm (24.3 in)	Longer than the 33 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, 33 years of values from 1905 to 1937.

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: 500.1 mm (19.7 in) in 1915; 496.6 mm (19.6 in) in 1909; 444.8 mm (17.5 in) in 1924.

Download the Data

Data for Kopiluila standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Kopiluila 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 2026-10-13 (13 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).