Record envelope, standing records and threshold days for Sea Mtn 12.15 (USC00518600), Hawaii, United States, with 45 years of record.
Key Facts for Sea Mtn 12.15
Sea Mtn 12.15 (USC00518600) is a weather station in Hawaii, United States at 19.13 latitude and -155.51 longitude, 24 m (80 ft) above sea level.
The station reports from 1982 to 2026, 45 years of record.
1,464 records set at Sea Mtn 12.15 still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Sea Mtn 12.15 set a daily record precipitation of 16.5 mm (0.6 in) on 13 June 2026.
About the Station
Location: Hawaii, United States, 19.13 latitude, -155.51 longitude.
Elevation: 24 m (80 ft).
Period of record: 1982 to 2026, 45 years.
Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Sea Mtn 12.15. 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 Sea Mtn 12.15, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
33.3 C (91.9 F)
13.3 C (55.9 F)
n/a
n/a
Feb
35.6 C (96.1 F)
13.3 C (55.9 F)
n/a
n/a
Mar
35.6 C (96.1 F)
13.9 C (57.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
12.8 C (55.0 F)
n/a
n/a
May
32.2 C (90.0 F)
16.1 C (61.0 F)
n/a
n/a
Jun
32.8 C (91.0 F)
16.7 C (62.1 F)
n/a
n/a
Jul
32.8 C (91.0 F)
15.6 C (60.1 F)
n/a
n/a
Aug
33.3 C (91.9 F)
16.1 C (61.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
16.7 C (62.1 F)
n/a
n/a
Oct
32.2 C (90.0 F)
16.7 C (62.1 F)
n/a
n/a
Nov
31.7 C (89.1 F)
16.7 C (62.1 F)
n/a
n/a
Dec
35.0 C (95.0 F)
13.9 C (57.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Sea Mtn 12.15 still stand. 1983 holds the most, with 132.
Standing records at Sea Mtn 12.15 by the year they were set
Year set
Standing records
1982
62
1983
132
1984
65
1985
106
1986
101
1987
47
1988
22
1989
29
1990
25
1991
65
1992
39
1993
69
1994
46
1995
31
1996
40
1997
24
1998
30
1999
30
2000
24
2001
18
2002
29
2003
40
2004
18
2005
44
2006
48
2007
27
2008
36
2009
48
2010
28
2011
24
2012
29
2013
22
2014
55
2015
11
All-Time Record Progression
1 new records
1 all-time records were set at Sea Mtn 12.15 between 7 August 2014 and 7 August 2014. Each dot is a new record.
When Sea Mtn 12.15 set new all-time records
Date
Kind
Detail
2014-08-07
Record daily precipitation
Record daily precipitation 279.4 mm (11.0 in)
Wettest Day of Each Month
Aug: 279.4 mm (11.0 in)
The wettest day on record for each calendar month at Sea Mtn 12.15. The most was 279.4 mm (11.0 in) on 7 August 2014.
Record daily precipitation for each month at Sea Mtn 12.15
Month
Record daily precipitation (mm)
Date
Jan
252.0 mm (9.9 in)
20 January 1990
Feb
171.5 mm (6.8 in)
4 February 2008
Mar
203.2 mm (8.0 in)
9 March 2009
Apr
175.8 mm (6.9 in)
11 April 1986
May
109.2 mm (4.3 in)
11 May 2004
Jun
101.6 mm (4.0 in)
2 June 2026
Jul
176.5 mm (6.9 in)
20 July 1989
Aug
279.4 mm (11.0 in)
7 August 2014
Sep
228.6 mm (9.0 in)
19 September 1994
Oct
130.8 mm (5.1 in)
20 October 2006
Nov
272.8 mm (10.7 in)
18 November 1990
Dec
117.9 mm (4.6 in)
2 December 1991
Period of Record Coverage
1982 to 2015
Complete yearUnder 90 percent of days
34 years of record at Sea Mtn 12.15, 1982 to 2015. 16 years have data for under 90 percent of days and are left out of rankings: 1982, 1991, 1994, 2000, 2001, 2002, 2003, 2004 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 17 complete years at Sea Mtn 12.15, 1983 to 2013. Blue stripes are years cooler than the station's own mean of 23.7 C (74.6 F); red stripes are warmer. The coolest year was 2008, at 23.0 C (73.3 F), and the warmest was 1983, at 24.2 C (75.5 F). The strongest colour marks a difference of 0.8 C (1.4 F).
Annual mean temperature at Sea Mtn 12.15 as warming stripes, 1983 to 2013
Year
Annual mean temperature
Difference from the station mean
1983
24.2 C
+0.49 C
1984
23.9 C
+0.17 C
1985
23.3 C
-0.36 C
1986
24.1 C
+0.45 C
1987
24.0 C
+0.29 C
1988
23.8 C
+0.11 C
1989
23.6 C
-0.08 C
1992
23.8 C
+0.12 C
1993
23.4 C
-0.29 C
1994
23.4 C
-0.28 C
1995
23.9 C
+0.21 C
1997
23.8 C
+0.12 C
1998
23.5 C
-0.16 C
2006
23.4 C
-0.25 C
2007
23.4 C
-0.28 C
2008
23.0 C
-0.72 C
2013
24.2 C
+0.47 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
1982 to 2026
Yearly extremes at Sea Mtn 12.15: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1995
32.2 C (90.0 F)
34
Coldest night (TNn)
12.8 C (55.0 F)
1986
14.4 C (57.9 F)
34
Wettest day (Rx1day)
279.4 mm (11.0 in)
2014
80.9 mm (3.2 in)
44
Wettest five days (Rx5day)
691.8 mm (27.2 in)
1990
147.2 mm (5.8 in)
42
Longest dry spell (CDD)
55 days
1998
30 days
44
Hottest day (TXx)
The hottest day of the year at Sea Mtn 12.15, 1982 to 2026. The record is 35.6 C (96.1 F) in 1995, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Sea Mtn 12.15 by year
Year
Hottest day (TXx)
1982
35.0 C (95.0 F)
1983
32.8 C (91.0 F)
1984
32.2 C (90.0 F)
1985
32.8 C (91.0 F)
1986
33.3 C (91.9 F)
1987
31.7 C (89.1 F)
1988
32.2 C (90.0 F)
1989
30.6 C (87.1 F)
1990
31.7 C (89.1 F)
1991
31.1 C (88.0 F)
1992
32.2 C (90.0 F)
1993
33.3 C (91.9 F)
1994
30.6 C (87.1 F)
1995
35.6 C (96.1 F)
1996
32.2 C (90.0 F)
1997
33.3 C (91.9 F)
1998
31.7 C (89.1 F)
1999
30.6 C (87.1 F)
2000
30.0 C (86.0 F)
2001
32.2 C (90.0 F)
2002
31.7 C (89.1 F)
2003
35.0 C (95.0 F)
2004
31.7 C (89.1 F)
2005
32.8 C (91.0 F)
2006
33.3 C (91.9 F)
2007
31.7 C (89.1 F)
2008
30.6 C (87.1 F)
2009
32.2 C (90.0 F)
2010
31.1 C (88.0 F)
2011
30.6 C (87.1 F)
2012
32.8 C (91.0 F)
2013
32.2 C (90.0 F)
2014
32.2 C (90.0 F)
2015
35.6 C (96.1 F)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Sea Mtn 12.15, 1982 to 2026. The record is 12.8 C (55.0 F) in 1986, marked on the chart; the median year is 14.4 C (57.9 F).
Coldest night (TNn) at Sea Mtn 12.15 by year
Year
Coldest night (TNn)
1982
15.6 C (60.1 F)
1983
14.4 C (57.9 F)
1984
15.6 C (60.1 F)
1985
15.0 C (59.0 F)
1986
12.8 C (55.0 F)
1987
13.9 C (57.0 F)
1988
15.6 C (60.1 F)
1989
16.1 C (61.0 F)
1990
13.9 C (57.0 F)
1991
13.9 C (57.0 F)
1992
14.4 C (57.9 F)
1993
13.9 C (57.0 F)
1994
14.4 C (57.9 F)
1995
14.4 C (57.9 F)
1996
15.6 C (60.1 F)
1997
13.9 C (57.0 F)
1998
13.9 C (57.0 F)
1999
13.9 C (57.0 F)
2000
13.3 C (55.9 F)
2001
15.0 C (59.0 F)
2002
13.9 C (57.0 F)
2003
15.0 C (59.0 F)
2004
15.6 C (60.1 F)
2005
13.3 C (55.9 F)
2006
13.3 C (55.9 F)
2007
14.4 C (57.9 F)
2008
15.0 C (59.0 F)
2009
13.3 C (55.9 F)
2010
15.6 C (60.1 F)
2011
16.1 C (61.0 F)
2012
13.3 C (55.9 F)
2013
14.4 C (57.9 F)
2014
14.4 C (57.9 F)
2015
14.4 C (57.9 F)
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Sea Mtn 12.15, 1982 to 2026. The record is 279.4 mm (11.0 in) in 2014, marked on the chart; the median year is 80.9 mm (3.2 in).
Wettest day (Rx1day) at Sea Mtn 12.15 by year
Year
Wettest day (Rx1day)
1982
163.1 mm (6.4 in)
1983
66.5 mm (2.6 in)
1984
53.3 mm (2.1 in)
1985
153.9 mm (6.1 in)
1986
175.8 mm (6.9 in)
1987
105.9 mm (4.2 in)
1988
79.2 mm (3.1 in)
1989
176.5 mm (6.9 in)
1990
272.8 mm (10.7 in)
1991
221.0 mm (8.7 in)
1992
98.0 mm (3.9 in)
1993
149.9 mm (5.9 in)
1994
228.6 mm (9.0 in)
1995
52.6 mm (2.1 in)
1996
101.6 mm (4.0 in)
1997
165.9 mm (6.5 in)
1998
41.7 mm (1.6 in)
1999
65.3 mm (2.6 in)
2000
93.5 mm (3.7 in)
2001
53.3 mm (2.1 in)
2002
71.6 mm (2.8 in)
2003
25.4 mm (1.0 in)
2004
109.2 mm (4.3 in)
2005
132.3 mm (5.2 in)
2006
130.8 mm (5.1 in)
2007
62.2 mm (2.4 in)
2008
171.5 mm (6.8 in)
2009
203.2 mm (8.0 in)
2010
39.1 mm (1.5 in)
2011
18.3 mm (0.7 in)
2012
42.7 mm (1.7 in)
2013
76.2 mm (3.0 in)
2014
279.4 mm (11.0 in)
2015
41.9 mm (1.6 in)
2017
50.8 mm (2.0 in)
2018
191.8 mm (7.6 in)
2019
82.6 mm (3.3 in)
2020
73.7 mm (2.9 in)
2021
55.9 mm (2.2 in)
2022
39.1 mm (1.5 in)
2023
55.9 mm (2.2 in)
2024
0.0 mm (0.00 in)
2025
0.0 mm (0.00 in)
2026
101.6 mm (4.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Sea Mtn 12.15, 1982 to 2026. The record is 691.8 mm (27.2 in) in 1990, marked on the chart; the median year is 147.2 mm (5.8 in).
Wettest five days (Rx5day) at Sea Mtn 12.15 by year
Year
Wettest five days (Rx5day)
1982
176.3 mm (6.9 in)
1983
91.9 mm (3.6 in)
1984
111.7 mm (4.4 in)
1985
208.0 mm (8.2 in)
1986
238.3 mm (9.4 in)
1987
188.8 mm (7.4 in)
1988
95.5 mm (3.8 in)
1989
268.7 mm (10.6 in)
1990
691.8 mm (27.2 in)
1991
248.4 mm (9.8 in)
1992
153.2 mm (6.0 in)
1993
215.7 mm (8.5 in)
1994
282.0 mm (11.1 in)
1995
94.7 mm (3.7 in)
1996
190.0 mm (7.5 in)
1997
185.6 mm (7.3 in)
1998
47.0 mm (1.9 in)
1999
183.6 mm (7.2 in)
2000
125.7 mm (4.9 in)
2001
101.6 mm (4.0 in)
2002
141.7 mm (5.6 in)
2003
61.3 mm (2.4 in)
2004
114.7 mm (4.5 in)
2005
144.4 mm (5.7 in)
2006
321.8 mm (12.7 in)
2007
149.9 mm (5.9 in)
2008
373.8 mm (14.7 in)
2009
293.4 mm (11.6 in)
2010
52.3 mm (2.1 in)
2011
31.0 mm (1.2 in)
2012
36.3 mm (1.4 in)
2013
61.0 mm (2.4 in)
2014
281.9 mm (11.1 in)
2015
60.8 mm (2.4 in)
2017
133.1 mm (5.2 in)
2018
207.1 mm (8.2 in)
2019
99.1 mm (3.9 in)
2020
102.2 mm (4.0 in)
2021
166.1 mm (6.5 in)
2022
61.2 mm (2.4 in)
2023
49.1 mm (1.9 in)
2024
n/a
2025
n/a
2026
150.8 mm (5.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Sea Mtn 12.15, 1982 to 2026. The record is 55 days in 1998, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Sea Mtn 12.15 by year
Year
Longest dry spell (CDD)
1982
16 days
1983
38 days
1984
54 days
1985
34 days
1986
40 days
1987
23 days
1988
37 days
1989
24 days
1990
54 days
1991
22 days
1992
39 days
1993
40 days
1994
36 days
1995
30 days
1996
32 days
1997
28 days
1998
55 days
1999
43 days
2000
45 days
2001
38 days
2002
36 days
2003
25 days
2004
21 days
2005
37 days
2006
34 days
2007
42 days
2008
23 days
2009
22 days
2010
30 days
2011
26 days
2012
38 days
2013
11 days
2014
10 days
2015
10 days
2017
11 days
2018
27 days
2019
24 days
2020
38 days
2021
43 days
2022
16 days
2023
5 days
2024
2 days
2025
2 days
2026
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.
Download the Data
Data for Sea Mtn 12.15 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sea Mtn 12.15 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.