Upolu Point Uscg 159.2 Weather Records (USC00518830)

Record envelope, standing records and threshold days for Upolu Point Uscg 159.2 (USC00518830), Hawaii, United States, with 37 years of record.

Key Facts for Upolu Point Uscg 159.2

Upolu Point Uscg 159.2 (USC00518830) is a weather station in Hawaii, United States at 20.25 latitude and -155.88 longitude, 19 m (61 ft) above sea level.
The station reports from 1956 to 1992, 37 years of record.
1,464 records set at Upolu Point Uscg 159.2 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Upolu Point Uscg 159.2 set a daily record low maximum temperature of 25.0 C (77.0 F) on 15 November 1992.

About the Station

Location: Hawaii, United States, 20.25 latitude, -155.88 longitude.
Elevation: 19 m (61 ft).
Period of record: 1956 to 1992, 37 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 Upolu Point Uscg 159.2. 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 Upolu Point Uscg 159.2, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	32.8 C (91.0 F)	11.1 C (52.0 F)	n/a	n/a
Feb	32.8 C (91.0 F)	13.3 C (55.9 F)	n/a	n/a
Mar	32.2 C (90.0 F)	11.1 C (52.0 F)	n/a	n/a
Apr	33.3 C (91.9 F)	13.3 C (55.9 F)	n/a	n/a
May	33.9 C (93.0 F)	13.3 C (55.9 F)	n/a	n/a
Jun	33.9 C (93.0 F)	13.9 C (57.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	13.9 C (57.0 F)	n/a	n/a
Aug	34.4 C (93.9 F)	14.4 C (57.9 F)	n/a	n/a
Sep	33.3 C (91.9 F)	15.0 C (59.0 F)	n/a	n/a
Oct	35.0 C (95.0 F)	15.0 C (59.0 F)	n/a	n/a
Nov	32.2 C (90.0 F)	14.4 C (57.9 F)	n/a	n/a
Dec	32.2 C (90.0 F)	12.2 C (54.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Upolu Point Uscg 159.2 still stand. 1956 holds the most, with 99.

Standing records at Upolu Point Uscg 159.2 by the year they were set
Year set	Standing records
1956	99
1957	83
1958	64
1959	28
1960	45
1961	57
1962	81
1963	64
1964	67
1965	39
1966	53
1967	27
1968	42
1969	26
1970	27
1971	49
1972	37
1973	23
1974	5
1975	43
1976	11
1977	43
1978	21
1979	31
1980	32
1981	82
1982	19
1983	28
1984	43
1985	29
1986	34
1987	46
1988	18
1989	17
1990	20
1991	13
1992	18

All-Time Record Progression

1 new records

1 all-time records were set at Upolu Point Uscg 159.2 between 1 March 1990 and 1 March 1990. Each dot is a new record.

Wettest Day of Each Month

Dec: 203.2 mm (8.0 in)

The wettest day on record for each calendar month at Upolu Point Uscg 159.2. The most was 203.2 mm (8.0 in) on 26 December 1983.

Record daily precipitation for each month at Upolu Point Uscg 159.2
Month	Record daily precipitation (mm)	Date
Jan	120.4 mm (4.7 in)	29 January 1971
Feb	72.4 mm (2.9 in)	17 February 1960
Mar	109.2 mm (4.3 in)	17 March 1980
Apr	51.6 mm (2.0 in)	11 April 1968
May	34.3 mm (1.4 in)	11 May 1961
Jun	57.4 mm (2.3 in)	18 June 1956
Jul	52.8 mm (2.1 in)	18 July 1964
Aug	129.0 mm (5.1 in)	7 August 1958
Sep	50.8 mm (2.0 in)	4 September 1992
Oct	75.2 mm (3.0 in)	6 October 1989
Nov	106.7 mm (4.2 in)	13 November 1973
Dec	203.2 mm (8.0 in)	26 December 1983

Period of Record Coverage

1956 to 1992

37 years of record at Upolu Point Uscg 159.2, 1956 to 1992. 4 years have data for under 90 percent of days and are left out of rankings: 1956, 1974, 1976, 1985.

Days with data per year at Upolu Point Uscg 159.2
Year	Days with data	Share of year	Complete
1956	224	61%	No
1957	353	97%	Yes
1958	345	95%	Yes
1959	363	99%	Yes
1960	365	100%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	364	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	364	100%	Yes
1970	362	99%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	363	99%	Yes
1974	31	8%	No
1975	359	98%	Yes
1976	329	90%	No
1977	364	100%	Yes
1978	361	99%	Yes
1979	352	96%	Yes
1980	359	98%	Yes
1981	353	97%	Yes
1982	331	91%	Yes
1983	361	99%	Yes
1984	362	99%	Yes
1985	325	89%	No
1986	356	98%	Yes
1987	361	99%	Yes
1988	362	99%	Yes
1989	364	100%	Yes
1990	363	99%	Yes
1991	350	96%	Yes
1992	357	98%	Yes

Latest Records

Latest records at Upolu Point Uscg 159.2
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
15 November 1992	Upolu Point Uscg 159.2, US	daily low max	25.0 C (77.0 F)	1.1 C (2.0 F)	22 years	15 of 100 (Routine)
15 November 1992	Upolu Point Uscg 159.2, US	daily rain (Tie)	12.4 mm (0.5 in)	tie	27 years	2 of 100 (Routine)
2 November 1992	Upolu Point Uscg 159.2, US	daily rain	50.8 mm (2.0 in)	31.0 mm (1.2 in)	25 years	43 of 100 (Notable)
24 October 1992	Upolu Point Uscg 159.2, US	daily high min (Tie)	23.3 C (73.9 F)	tie	12 years	1 of 100 (Routine)
13 October 1992	Upolu Point Uscg 159.2, US	daily high min (Tie)	23.3 C (73.9 F)	tie	24 years	2 of 100 (Routine)
26 September 1992	Upolu Point Uscg 159.2, US	daily rain	8.1 mm (0.32 in)	3.5 mm (0.14 in)	36 years	20 of 100 (Routine)
14 September 1992	Upolu Point Uscg 159.2, US	daily rain	14.2 mm (0.6 in)	9.1 mm (0.36 in)	5 years	20 of 100 (Routine)
12 September 1992	Upolu Point Uscg 159.2, US	daily high min (Tie)	24.4 C (75.9 F)	tie	23 years	2 of 100 (Routine)
11 September 1992	Upolu Point Uscg 159.2, US	monthly high min (Tie)	26.1 C (79.0 F)	tie	30 years	5 of 100 (Routine)
6 September 1992	Upolu Point Uscg 159.2, US	daily rain	6.6 mm (0.26 in)	0.2 mm (0.01 in)	34 years	13 of 100 (Routine)
4 September 1992	Upolu Point Uscg 159.2, US	monthly rain	50.8 mm (2.0 in)	19.6 mm (0.8 in)	0 years	53 of 100 (Notable)
4 September 1992	Upolu Point Uscg 159.2, US	daily low max (Tie)	26.7 C (80.1 F)	tie	23 years	2 of 100 (Routine)
3 September 1992	Upolu Point Uscg 159.2, US	daily low max	25.6 C (78.1 F)	2.2 C (4.0 F)	33 years	27 of 100 (Routine)
3 September 1992	Upolu Point Uscg 159.2, US	monthly rain	31.2 mm (1.2 in)	2.5 mm (0.10 in)	1 year	19 of 100 (Routine)
2 September 1992	Upolu Point Uscg 159.2, US	daily rain	16.0 mm (0.6 in)	7.1 mm (0.28 in)	3 years	20 of 100 (Routine)
17 August 1992	Upolu Point Uscg 159.2, US	daily high min (Tie)	23.9 C (75.0 F)	tie	11 years	1 of 100 (Routine)
14 August 1992	Upolu Point Uscg 159.2, US	daily high min (Tie)	23.3 C (73.9 F)	tie	6 years	1 of 100 (Routine)
13 August 1992	Upolu Point Uscg 159.2, US	daily low max (Tie)	26.1 C (79.0 F)	tie	22 years	2 of 100 (Routine)
27 July 1992	Upolu Point Uscg 159.2, US	daily rain	17.5 mm (0.7 in)	8.4 mm (0.33 in)	20 years	20 of 100 (Routine)
26 July 1992	Upolu Point Uscg 159.2, US	daily rain	17.3 mm (0.7 in)	4.9 mm (0.19 in)	35 years	20 of 100 (Routine)

Climate Trend

31 complete years, 1957 to 1992

One stripe for each of 31 complete years at Upolu Point Uscg 159.2, 1957 to 1992. Blue stripes are years cooler than the station's own mean of 24.3 C (75.7 F); red stripes are warmer. The coolest year was 1975, at 23.2 C (73.8 F), and the warmest was 1981, at 25.3 C (77.5 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Upolu Point Uscg 159.2 as warming stripes, 1957 to 1992
Year	Annual mean temperature	Difference from the station mean
1957	23.4 C	-0.94 C
1958	23.4 C	-0.90 C
1959	23.8 C	-0.50 C
1961	24.0 C	-0.25 C
1962	24.7 C	+0.39 C
1963	24.7 C	+0.40 C
1964	24.2 C	-0.05 C
1965	24.4 C	+0.09 C
1966	23.8 C	-0.54 C
1967	24.3 C	-0.04 C
1968	25.0 C	+0.73 C
1969	23.8 C	-0.50 C
1970	23.9 C	-0.35 C
1971	23.7 C	-0.59 C
1972	24.2 C	-0.14 C
1973	23.8 C	-0.53 C
1975	23.2 C	-1.07 C
1977	24.4 C	+0.09 C
1978	24.4 C	+0.07 C
1979	24.0 C	-0.32 C
1980	24.4 C	+0.07 C
1981	25.3 C	+0.96 C
1983	24.6 C	+0.26 C
1984	25.1 C	+0.84 C
1986	25.2 C	+0.89 C
1987	25.1 C	+0.80 C
1988	25.2 C	+0.95 C
1989	24.4 C	+0.14 C
1990	24.2 C	-0.08 C
1991	24.4 C	+0.10 C
1992	24.4 C	+0.14 C

The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1957 to 1992. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Upolu Point Uscg 159.2
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.3 C (0.1 to 0.4) per decade	0.5 F (0.2 to 0.8) per decade	1957 to 1992	31	Rise
Mean daily maximum	0.4 C (0.2 to 0.5) per decade	0.6 F (0.3 to 1.0) per decade	1957 to 1992	31	Rise
Mean daily minimum	0.18 C (0.01 to 0.36) per decade	0.33 F (0.01 to 0.64) per decade	1957 to 1992	31	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

1956 to 1992

Yearly extremes at Upolu Point Uscg 159.2: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1956	32.2 C (90.0 F)	37
Coldest night (TNn)	11.1 C (52.0 F)	1958	14.4 C (57.9 F)	37
Wettest day (Rx1day)	203.2 mm (8.0 in)	1983	55.9 mm (2.2 in)	37
Wettest five days (Rx5day)	242.1 mm (9.5 in)	1980	106.7 mm (4.2 in)	37
Longest dry spell (CDD)	34 days	1963	19 days	37

Hottest day (TXx)

The hottest day of the year at Upolu Point Uscg 159.2, 1956 to 1992. The record is 36.7 C (98.1 F) in 1956, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Upolu Point Uscg 159.2 by year
Year	Hottest day (TXx)
1956	36.7 C (98.1 F)
1957	32.2 C (90.0 F)
1958	34.4 C (93.9 F)
1959	31.7 C (89.1 F)
1960	32.2 C (90.0 F)
1961	35.0 C (95.0 F)
1962	33.3 C (91.9 F)
1963	32.8 C (91.0 F)
1964	32.8 C (91.0 F)
1965	31.7 C (89.1 F)
1966	31.7 C (89.1 F)
1967	31.1 C (88.0 F)
1968	33.3 C (91.9 F)
1969	31.1 C (88.0 F)
1970	31.7 C (89.1 F)
1971	30.0 C (86.0 F)
1972	31.7 C (89.1 F)
1973	31.7 C (89.1 F)
1974	28.3 C (82.9 F)
1975	30.6 C (87.1 F)
1976	31.7 C (89.1 F)
1977	32.2 C (90.0 F)
1978	31.1 C (88.0 F)
1979	32.2 C (90.0 F)
1980	33.3 C (91.9 F)
1981	33.9 C (93.0 F)
1982	31.1 C (88.0 F)
1983	31.7 C (89.1 F)
1984	34.4 C (93.9 F)
1985	32.8 C (91.0 F)
1986	33.3 C (91.9 F)
1987	33.3 C (91.9 F)
1988	32.8 C (91.0 F)
1989	32.8 C (91.0 F)
1990	32.8 C (91.0 F)
1991	32.8 C (91.0 F)
1992	33.3 C (91.9 F)

Coldest night (TNn)

The coldest night of the year at Upolu Point Uscg 159.2, 1956 to 1992. The record is 11.1 C (52.0 F) in 1958, marked on the chart; the median year is 14.4 C (57.9 F).

Coldest night (TNn) at Upolu Point Uscg 159.2 by year
Year	Coldest night (TNn)
1956	13.3 C (55.9 F)
1957	12.2 C (54.0 F)
1958	11.1 C (52.0 F)
1959	15.6 C (60.1 F)
1960	15.6 C (60.1 F)
1961	11.1 C (52.0 F)
1962	13.9 C (57.0 F)
1963	12.2 C (54.0 F)
1964	14.4 C (57.9 F)
1965	16.7 C (62.1 F)
1966	13.3 C (55.9 F)
1967	13.3 C (55.9 F)
1968	16.1 C (61.0 F)
1969	15.0 C (59.0 F)
1970	16.1 C (61.0 F)
1971	13.3 C (55.9 F)
1972	12.8 C (55.0 F)
1973	15.6 C (60.1 F)
1974	17.2 C (63.0 F)
1975	13.3 C (55.9 F)
1976	13.3 C (55.9 F)
1977	14.4 C (57.9 F)
1978	14.4 C (57.9 F)
1979	14.4 C (57.9 F)
1980	16.1 C (61.0 F)
1981	14.4 C (57.9 F)
1982	16.7 C (62.1 F)
1983	14.4 C (57.9 F)
1984	17.8 C (64.0 F)
1985	16.7 C (62.1 F)
1986	13.3 C (55.9 F)
1987	17.8 C (64.0 F)
1988	15.6 C (60.1 F)
1989	13.9 C (57.0 F)
1990	15.6 C (60.1 F)
1991	15.6 C (60.1 F)
1992	15.6 C (60.1 F)

Wettest day (Rx1day)

The wettest day of the year at Upolu Point Uscg 159.2, 1956 to 1992. The record is 203.2 mm (8.0 in) in 1983, marked on the chart; the median year is 55.9 mm (2.2 in).

Wettest day (Rx1day) at Upolu Point Uscg 159.2 by year
Year	Wettest day (Rx1day)
1956	59.7 mm (2.4 in)
1957	67.1 mm (2.6 in)
1958	129.0 mm (5.1 in)
1959	94.7 mm (3.7 in)
1960	72.4 mm (2.9 in)
1961	50.0 mm (2.0 in)
1962	47.2 mm (1.9 in)
1963	55.9 mm (2.2 in)
1964	52.8 mm (2.1 in)
1965	49.0 mm (1.9 in)
1966	35.6 mm (1.4 in)
1967	48.0 mm (1.9 in)
1968	72.6 mm (2.9 in)
1969	55.6 mm (2.2 in)
1970	60.7 mm (2.4 in)
1971	120.4 mm (4.7 in)
1972	52.1 mm (2.1 in)
1973	106.7 mm (4.2 in)
1974	33.8 mm (1.3 in)
1975	41.9 mm (1.6 in)
1976	30.0 mm (1.2 in)
1977	36.1 mm (1.4 in)
1978	27.4 mm (1.1 in)
1979	85.6 mm (3.4 in)
1980	109.2 mm (4.3 in)
1981	53.3 mm (2.1 in)
1982	102.9 mm (4.1 in)
1983	203.2 mm (8.0 in)
1984	31.0 mm (1.2 in)
1985	51.8 mm (2.0 in)
1986	79.5 mm (3.1 in)
1987	52.8 mm (2.1 in)
1988	105.9 mm (4.2 in)
1989	95.3 mm (3.8 in)
1990	93.2 mm (3.7 in)
1991	63.8 mm (2.5 in)
1992	50.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Upolu Point Uscg 159.2, 1956 to 1992. The record is 242.1 mm (9.5 in) in 1980, marked on the chart; the median year is 106.7 mm (4.2 in).

Wettest five days (Rx5day) at Upolu Point Uscg 159.2 by year
Year	Wettest five days (Rx5day)
1956	74.7 mm (2.9 in)
1957	106.7 mm (4.2 in)
1958	159.7 mm (6.3 in)
1959	168.8 mm (6.6 in)
1960	129.4 mm (5.1 in)
1961	63.7 mm (2.5 in)
1962	56.6 mm (2.2 in)
1963	90.8 mm (3.6 in)
1964	61.2 mm (2.4 in)
1965	87.9 mm (3.5 in)
1966	60.5 mm (2.4 in)
1967	61.3 mm (2.4 in)
1968	123.1 mm (4.8 in)
1969	136.0 mm (5.4 in)
1970	75.2 mm (3.0 in)
1971	151.4 mm (6.0 in)
1972	77.5 mm (3.1 in)
1973	168.2 mm (6.6 in)
1974	49.3 mm (1.9 in)
1975	99.0 mm (3.9 in)
1976	62.5 mm (2.5 in)
1977	113.8 mm (4.5 in)
1978	44.4 mm (1.7 in)
1979	120.2 mm (4.7 in)
1980	242.1 mm (9.5 in)
1981	91.2 mm (3.6 in)
1982	137.4 mm (5.4 in)
1983	203.5 mm (8.0 in)
1984	56.1 mm (2.2 in)
1985	80.3 mm (3.2 in)
1986	160.3 mm (6.3 in)
1987	86.4 mm (3.4 in)
1988	108.5 mm (4.3 in)
1989	133.1 mm (5.2 in)
1990	206.3 mm (8.1 in)
1991	148.1 mm (5.8 in)
1992	111.0 mm (4.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Upolu Point Uscg 159.2, 1956 to 1992. The record is 34 days in 1963, marked on the chart; the median year is 19 days.

Longest dry spell (CDD) at Upolu Point Uscg 159.2 by year
Year	Longest dry spell (CDD)
1956	11 days
1957	13 days
1958	17 days
1959	16 days
1960	24 days
1961	27 days
1962	28 days
1963	34 days
1964	20 days
1965	25 days
1966	16 days
1967	20 days
1968	15 days
1969	14 days
1970	13 days
1971	14 days
1972	19 days
1973	18 days
1974	6 days
1975	25 days
1976	22 days
1977	20 days
1978	31 days
1979	13 days
1980	20 days
1981	28 days
1982	17 days
1983	23 days
1984	21 days
1985	19 days
1986	13 days
1987	23 days
1988	13 days
1989	19 days
1990	16 days
1991	22 days
1992	14 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

35 years, 1957 to 1992

A day with at least 62.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 207.1 mm (8.2 in) of rain is expected about once in 100 years.

Rainfall return levels at Upolu Point Uscg 159.2: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	62.3 mm (2.5 in)
5 years	92.3 mm (3.6 in)
10 years	115.3 mm (4.5 in)
25 years	148.4 mm (5.8 in)
50 years	176.3 mm (6.9 in)	Longer than the 35 years of record
100 years	207.1 mm (8.2 in)	Longer than the 35 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, 35 years of values from 1957 to 1992.

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: 203.2 mm (8.0 in) in 1983; 129.0 mm (5.1 in) in 1958; 120.4 mm (4.7 in) in 1971.

Download the Data

Data for Upolu Point Uscg 159.2 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Upolu Point Uscg 159.2 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).