Record envelope, standing records and threshold days for Haleakala Rs 338 (USC00511004), Hawaii, United States, with 88 years of record.
Key Facts for Haleakala Rs 338
Haleakala Rs 338 (USC00511004) is a weather station in Hawaii, United States at 20.76 latitude and -156.25 longitude, 2,122 m (6,962 ft) above sea level.
The station reports from 1939 to 2026, 88 years of record.
1,464 records set at Haleakala Rs 338 still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Haleakala Rs 338 set a daily record precipitation of 52.1 mm (2.1 in) on 19 July 2023.
About the Station
Location: Hawaii, United States, 20.76 latitude, -156.25 longitude.
Elevation: 2,122 m (6,962 ft).
Period of record: 1939 to 2026, 88 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
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 Haleakala Rs 338. 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 Haleakala Rs 338, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-1.7 C (28.9 F)
n/a
n/a
Feb
24.4 C (75.9 F)
-2.8 C (27.0 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-1.1 C (30.0 F)
n/a
n/a
Apr
26.1 C (79.0 F)
-0.6 C (30.9 F)
n/a
n/a
May
25.6 C (78.1 F)
0.0 C (32.0 F)
n/a
n/a
Jun
25.6 C (78.1 F)
0.6 C (33.1 F)
n/a
n/a
Jul
26.7 C (80.1 F)
0.0 C (32.0 F)
n/a
n/a
Aug
25.6 C (78.1 F)
0.6 C (33.1 F)
n/a
n/a
Sep
25.6 C (78.1 F)
1.7 C (35.1 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-0.6 C (30.9 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-1.7 C (28.9 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-1.1 C (30.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Haleakala Rs 338 still stand. 1955 holds the most, with 53.
Standing records at Haleakala Rs 338 by the year they were set
Year set
Standing records
1940
1
1942
9
1944
18
1945
15
1946
11
1947
35
1948
18
1949
29
1950
20
1951
15
1952
25
1953
34
1954
26
1955
53
1956
22
1957
23
1958
36
1959
49
1960
18
1961
25
1962
23
1963
18
1964
19
1965
18
1966
18
1967
15
1968
9
1969
17
1970
23
1971
24
1972
24
1973
25
1974
23
1975
32
1976
22
1977
17
1978
22
1979
29
1980
16
1981
22
1982
24
1983
22
1984
27
1985
23
1986
22
1987
13
1988
12
1989
9
1990
22
1991
13
1992
13
1993
16
1994
18
1995
17
1996
15
1997
4
1998
25
1999
20
2000
20
2001
31
2002
19
2003
12
2004
6
2005
10
2006
24
2007
8
2008
13
2009
14
2010
23
2011
6
2012
12
2013
3
2014
7
2015
6
2016
4
2017
14
2018
6
2020
2
2022
11
All-Time Record Progression
3 new records
3 all-time records were set at Haleakala Rs 338 between 9 January 1980 and 8 November 2002. Each dot is a new record.
When Haleakala Rs 338 set new all-time records
Date
Kind
Detail
1980-01-09
Record daily precipitation
Record daily precipitation 469.9 mm (18.5 in)
1990-06-12
Record high minimum temperature
Record high minimum temperature 16.1 C (61.0 F)
2002-11-08
Record high minimum temperature
Record high minimum temperature 16.7 C (62.1 F)
Wettest Day of Each Month
Jan: 469.9 mm (18.5 in)
The wettest day on record for each calendar month at Haleakala Rs 338. The most was 469.9 mm (18.5 in) on 9 January 1980.
Record daily precipitation for each month at Haleakala Rs 338
Month
Record daily precipitation (mm)
Date
Jan
469.9 mm (18.5 in)
9 January 1980
Feb
425.2 mm (16.7 in)
13 February 1960
Mar
359.7 mm (14.2 in)
24 March 1980
Apr
223.5 mm (8.8 in)
9 April 1986
May
92.5 mm (3.6 in)
15 May 1963
Jun
73.7 mm (2.9 in)
26 June 1997
Jul
87.4 mm (3.4 in)
30 July 1997
Aug
182.9 mm (7.2 in)
25 August 1940
Sep
68.8 mm (2.7 in)
15 September 1942
Oct
118.1 mm (4.6 in)
24 October 1993
Nov
358.1 mm (14.1 in)
29 November 1968
Dec
311.2 mm (12.3 in)
21 December 1946
Period of Record Coverage
1940 to 2022
Complete yearUnder 90 percent of days
80 years of record at Haleakala Rs 338, 1940 to 2022. 18 years have data for under 90 percent of days and are left out of rankings: 1940, 1942, 1946, 1949, 2005, 2007, 2008, 2011 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 65 complete years at Haleakala Rs 338, 1944 to 2010. Blue stripes are years cooler than the station's own mean of 12.1 C (53.7 F); red stripes are warmer. The coolest year was 1965, at 11.1 C (51.9 F), and the warmest was 2002, at 13.1 C (55.6 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Haleakala Rs 338 as warming stripes, 1944 to 2010
Year
Annual mean temperature
Difference from the station mean
1944
11.8 C
-0.23 C
1945
12.3 C
+0.22 C
1947
12.3 C
+0.21 C
1948
11.3 C
-0.77 C
1950
11.8 C
-0.29 C
1951
12.0 C
-0.06 C
1952
11.5 C
-0.54 C
1953
12.5 C
+0.45 C
1954
12.1 C
+0.02 C
1955
11.1 C
-0.92 C
1956
11.5 C
-0.58 C
1957
11.5 C
-0.52 C
1958
11.9 C
-0.15 C
1959
12.7 C
+0.65 C
1960
12.1 C
+0.06 C
1961
12.2 C
+0.11 C
1962
12.0 C
-0.05 C
1963
11.9 C
-0.17 C
1964
11.6 C
-0.46 C
1965
11.1 C
-0.99 C
1966
12.0 C
-0.06 C
1967
11.9 C
-0.12 C
1968
12.6 C
+0.49 C
1969
11.7 C
-0.39 C
1970
11.5 C
-0.59 C
1971
11.5 C
-0.56 C
1972
11.5 C
-0.55 C
1973
11.8 C
-0.30 C
1974
11.6 C
-0.49 C
1975
11.5 C
-0.52 C
1976
11.4 C
-0.69 C
1977
12.4 C
+0.33 C
1978
11.9 C
-0.14 C
1979
11.5 C
-0.57 C
1980
11.9 C
-0.16 C
1981
12.1 C
+0.02 C
1982
11.9 C
-0.18 C
1983
11.9 C
-0.13 C
1984
12.1 C
+0.08 C
1985
11.3 C
-0.72 C
1986
12.6 C
+0.51 C
1987
12.0 C
-0.09 C
1988
12.4 C
+0.38 C
1989
11.8 C
-0.27 C
1990
12.3 C
+0.20 C
1991
12.2 C
+0.15 C
1992
12.5 C
+0.44 C
1993
12.0 C
-0.08 C
1994
12.4 C
+0.32 C
1995
12.6 C
+0.58 C
1996
12.9 C
+0.81 C
1997
12.5 C
+0.39 C
1998
12.1 C
-0.01 C
1999
12.1 C
+0.04 C
2000
12.7 C
+0.67 C
2001
12.7 C
+0.67 C
2002
13.1 C
+1.05 C
2003
12.7 C
+0.62 C
2004
12.4 C
+0.38 C
2005
12.6 C
+0.51 C
2006
12.9 C
+0.85 C
2007
12.3 C
+0.26 C
2008
12.2 C
+0.16 C
2009
12.4 C
+0.29 C
2010
12.6 C
+0.49 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1944 to 2010. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 65 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Haleakala Rs 338
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1944 to 2010
65
Rise
Mean daily maximum
0.02 C (-0.04 to 0.09) per decade
0.04 F (-0.07 to 0.15) per decade
1944 to 2010
65
Not clearly different from zero
Mean daily minimum
0.2 C (0.2 to 0.3) per decade
0.4 F (0.3 to 0.6) per decade
1944 to 2010
65
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
1939 to 2026
Yearly extremes at Haleakala Rs 338: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
26.7 C (80.1 F)
1947
23.9 C (75.0 F)
80
Coldest night (TNn)
-2.8 C (27.0 F)
1965
0.6 C (33.1 F)
80
Wettest day (Rx1day)
469.9 mm (18.5 in)
1980
113.8 mm (4.5 in)
87
Wettest five days (Rx5day)
1,066.1 mm (42.0 in)
1980
189.0 mm (7.4 in)
87
Longest dry spell (CDD)
54 days
2000
22 days
87
Hottest day (TXx)
The hottest day of the year at Haleakala Rs 338, 1939 to 2026. The record is 26.7 C (80.1 F) in 1947, marked on the chart; the median year is 23.9 C (75.0 F).
Hottest day (TXx) at Haleakala Rs 338 by year
Year
Hottest day (TXx)
1939
n/a
1940
25.0 C (77.0 F)
1941
n/a
1942
23.9 C (75.0 F)
1943
n/a
1944
23.3 C (73.9 F)
1945
23.3 C (73.9 F)
1946
23.3 C (73.9 F)
1947
26.7 C (80.1 F)
1948
25.0 C (77.0 F)
1949
25.6 C (78.1 F)
1950
24.4 C (75.9 F)
1951
23.3 C (73.9 F)
1952
23.9 C (75.0 F)
1953
26.7 C (80.1 F)
1954
23.9 C (75.0 F)
1955
23.9 C (75.0 F)
1956
21.7 C (71.1 F)
1957
23.9 C (75.0 F)
1958
23.3 C (73.9 F)
1959
24.4 C (75.9 F)
1960
23.3 C (73.9 F)
1961
24.4 C (75.9 F)
1962
24.4 C (75.9 F)
1963
23.3 C (73.9 F)
1964
24.4 C (75.9 F)
1965
23.3 C (73.9 F)
1966
24.4 C (75.9 F)
1967
23.3 C (73.9 F)
1968
23.3 C (73.9 F)
1969
24.4 C (75.9 F)
1970
23.9 C (75.0 F)
1971
23.9 C (75.0 F)
1972
23.9 C (75.0 F)
1973
26.7 C (80.1 F)
1974
23.3 C (73.9 F)
1975
23.9 C (75.0 F)
1976
23.9 C (75.0 F)
1977
23.9 C (75.0 F)
1978
23.9 C (75.0 F)
1979
24.4 C (75.9 F)
1980
23.3 C (73.9 F)
1981
23.9 C (75.0 F)
1982
22.8 C (73.0 F)
1983
25.6 C (78.1 F)
1984
23.9 C (75.0 F)
1985
25.6 C (78.1 F)
1986
25.6 C (78.1 F)
1987
23.3 C (73.9 F)
1988
23.9 C (75.0 F)
1989
22.8 C (73.0 F)
1990
23.3 C (73.9 F)
1991
22.8 C (73.0 F)
1992
23.3 C (73.9 F)
1993
23.3 C (73.9 F)
1994
22.2 C (72.0 F)
1995
22.8 C (73.0 F)
1996
23.3 C (73.9 F)
1997
23.9 C (75.0 F)
1998
23.9 C (75.0 F)
1999
23.9 C (75.0 F)
2000
23.9 C (75.0 F)
2001
23.3 C (73.9 F)
2002
24.4 C (75.9 F)
2003
23.3 C (73.9 F)
2004
22.8 C (73.0 F)
2005
23.3 C (73.9 F)
2006
25.6 C (78.1 F)
2007
23.3 C (73.9 F)
2008
22.8 C (73.0 F)
2009
23.9 C (75.0 F)
2010
24.4 C (75.9 F)
2011
23.3 C (73.9 F)
2012
25.0 C (77.0 F)
2013
23.9 C (75.0 F)
2014
24.4 C (75.9 F)
2015
23.3 C (73.9 F)
2016
22.8 C (73.0 F)
2017
23.9 C (75.0 F)
2018
25.0 C (77.0 F)
2019
20.0 C (68.0 F)
2020
20.0 C (68.0 F)
2021
n/a
2022
10.6 C (51.1 F)
2023
n/a
2024
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Haleakala Rs 338, 1939 to 2026. The record is -2.8 C (27.0 F) in 1965, marked on the chart; the median year is 0.6 C (33.1 F).
Coldest night (TNn) at Haleakala Rs 338 by year
Year
Coldest night (TNn)
1939
n/a
1940
4.4 C (39.9 F)
1941
n/a
1942
0.6 C (33.1 F)
1943
n/a
1944
0.0 C (32.0 F)
1945
1.7 C (35.1 F)
1946
1.1 C (34.0 F)
1947
-1.7 C (28.9 F)
1948
0.6 C (33.1 F)
1949
0.0 C (32.0 F)
1950
1.1 C (34.0 F)
1951
1.1 C (34.0 F)
1952
0.0 C (32.0 F)
1953
1.1 C (34.0 F)
1954
-1.1 C (30.0 F)
1955
-1.1 C (30.0 F)
1956
1.1 C (34.0 F)
1957
0.6 C (33.1 F)
1958
0.0 C (32.0 F)
1959
0.6 C (33.1 F)
1960
0.6 C (33.1 F)
1961
1.7 C (35.1 F)
1962
-0.6 C (30.9 F)
1963
-1.1 C (30.0 F)
1964
-0.6 C (30.9 F)
1965
-2.8 C (27.0 F)
1966
-0.6 C (30.9 F)
1967
0.0 C (32.0 F)
1968
0.0 C (32.0 F)
1969
-1.1 C (30.0 F)
1970
0.6 C (33.1 F)
1971
-0.6 C (30.9 F)
1972
-0.6 C (30.9 F)
1973
-0.6 C (30.9 F)
1974
0.0 C (32.0 F)
1975
-0.6 C (30.9 F)
1976
-2.2 C (28.0 F)
1977
0.6 C (33.1 F)
1978
-1.1 C (30.0 F)
1979
0.0 C (32.0 F)
1980
0.0 C (32.0 F)
1981
0.0 C (32.0 F)
1982
-1.1 C (30.0 F)
1983
-1.7 C (28.9 F)
1984
0.6 C (33.1 F)
1985
-0.6 C (30.9 F)
1986
0.6 C (33.1 F)
1987
1.1 C (34.0 F)
1988
1.7 C (35.1 F)
1989
1.1 C (34.0 F)
1990
-1.1 C (30.0 F)
1991
0.6 C (33.1 F)
1992
1.1 C (34.0 F)
1993
0.6 C (33.1 F)
1994
2.2 C (36.0 F)
1995
2.8 C (37.0 F)
1996
2.2 C (36.0 F)
1997
1.7 C (35.1 F)
1998
1.1 C (34.0 F)
1999
1.7 C (35.1 F)
2000
0.6 C (33.1 F)
2001
0.6 C (33.1 F)
2002
0.6 C (33.1 F)
2003
1.7 C (35.1 F)
2004
2.8 C (37.0 F)
2005
1.7 C (35.1 F)
2006
1.7 C (35.1 F)
2007
1.7 C (35.1 F)
2008
0.6 C (33.1 F)
2009
0.6 C (33.1 F)
2010
1.7 C (35.1 F)
2011
2.2 C (36.0 F)
2012
-0.6 C (30.9 F)
2013
1.1 C (34.0 F)
2014
1.1 C (34.0 F)
2015
0.6 C (33.1 F)
2016
2.8 C (37.0 F)
2017
1.1 C (34.0 F)
2018
1.7 C (35.1 F)
2019
5.6 C (42.1 F)
2020
3.9 C (39.0 F)
2021
n/a
2022
2.2 C (36.0 F)
2023
n/a
2024
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Haleakala Rs 338, 1939 to 2026. The record is 469.9 mm (18.5 in) in 1980, marked on the chart; the median year is 113.8 mm (4.5 in).
Wettest day (Rx1day) at Haleakala Rs 338 by year
Year
Wettest day (Rx1day)
1939
66.3 mm (2.6 in)
1940
182.9 mm (7.2 in)
1941
90.4 mm (3.6 in)
1942
113.8 mm (4.5 in)
1943
80.0 mm (3.1 in)
1944
112.0 mm (4.4 in)
1945
64.8 mm (2.6 in)
1946
311.2 mm (12.3 in)
1947
134.6 mm (5.3 in)
1948
357.6 mm (14.1 in)
1949
90.4 mm (3.6 in)
1950
152.4 mm (6.0 in)
1951
158.2 mm (6.2 in)
1952
129.5 mm (5.1 in)
1953
127.0 mm (5.0 in)
1954
310.6 mm (12.2 in)
1955
205.7 mm (8.1 in)
1956
236.2 mm (9.3 in)
1957
90.2 mm (3.6 in)
1958
181.4 mm (7.1 in)
1959
308.4 mm (12.1 in)
1960
425.2 mm (16.7 in)
1961
116.8 mm (4.6 in)
1962
41.7 mm (1.6 in)
1963
177.8 mm (7.0 in)
1964
103.4 mm (4.1 in)
1965
106.7 mm (4.2 in)
1966
111.8 mm (4.4 in)
1967
190.5 mm (7.5 in)
1968
358.1 mm (14.1 in)
1969
215.9 mm (8.5 in)
1970
180.3 mm (7.1 in)
1971
210.8 mm (8.3 in)
1972
77.5 mm (3.1 in)
1973
138.2 mm (5.4 in)
1974
79.0 mm (3.1 in)
1975
59.2 mm (2.3 in)
1976
111.8 mm (4.4 in)
1977
64.5 mm (2.5 in)
1978
114.0 mm (4.5 in)
1979
197.6 mm (7.8 in)
1980
469.9 mm (18.5 in)
1981
88.4 mm (3.5 in)
1982
238.8 mm (9.4 in)
1983
136.7 mm (5.4 in)
1984
80.0 mm (3.1 in)
1985
244.1 mm (9.6 in)
1986
223.5 mm (8.8 in)
1987
172.7 mm (6.8 in)
1988
185.2 mm (7.3 in)
1989
167.6 mm (6.6 in)
1990
146.1 mm (5.8 in)
1991
147.3 mm (5.8 in)
1992
142.2 mm (5.6 in)
1993
118.1 mm (4.6 in)
1994
161.5 mm (6.4 in)
1995
26.2 mm (1.0 in)
1996
155.4 mm (6.1 in)
1997
87.4 mm (3.4 in)
1998
73.7 mm (2.9 in)
1999
99.6 mm (3.9 in)
2000
81.3 mm (3.2 in)
2001
152.4 mm (6.0 in)
2002
101.6 mm (4.0 in)
2003
78.7 mm (3.1 in)
2004
139.7 mm (5.5 in)
2005
58.4 mm (2.3 in)
2006
76.2 mm (3.0 in)
2007
44.5 mm (1.8 in)
2008
64.8 mm (2.6 in)
2009
100.8 mm (4.0 in)
2010
94.0 mm (3.7 in)
2011
176.5 mm (6.9 in)
2012
49.5 mm (1.9 in)
2013
69.6 mm (2.7 in)
2014
129.3 mm (5.1 in)
2015
113.0 mm (4.4 in)
2016
66.0 mm (2.6 in)
2017
70.9 mm (2.8 in)
2018
61.5 mm (2.4 in)
2019
54.4 mm (2.1 in)
2020
80.3 mm (3.2 in)
2021
101.6 mm (4.0 in)
2022
113.3 mm (4.5 in)
2023
81.8 mm (3.2 in)
2024
115.8 mm (4.6 in)
2026
32.3 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Haleakala Rs 338, 1939 to 2026. The record is 1,066.1 mm (42.0 in) in 1980, marked on the chart; the median year is 189.0 mm (7.4 in).
Wettest five days (Rx5day) at Haleakala Rs 338 by year
Year
Wettest five days (Rx5day)
1939
145.5 mm (5.7 in)
1940
239.8 mm (9.4 in)
1941
136.2 mm (5.4 in)
1942
269.4 mm (10.6 in)
1943
233.5 mm (9.2 in)
1944
209.5 mm (8.2 in)
1945
178.6 mm (7.0 in)
1946
419.2 mm (16.5 in)
1947
192.1 mm (7.6 in)
1948
738.7 mm (29.1 in)
1949
188.2 mm (7.4 in)
1950
230.8 mm (9.1 in)
1951
223.2 mm (8.8 in)
1952
158.7 mm (6.2 in)
1953
148.8 mm (5.9 in)
1954
604.5 mm (23.8 in)
1955
466.3 mm (18.4 in)
1956
343.2 mm (13.5 in)
1957
181.4 mm (7.1 in)
1958
212.9 mm (8.4 in)
1959
455.7 mm (17.9 in)
1960
669.4 mm (26.4 in)
1961
245.7 mm (9.7 in)
1962
76.9 mm (3.0 in)
1963
189.0 mm (7.4 in)
1964
315.0 mm (12.4 in)
1965
218.7 mm (8.6 in)
1966
144.8 mm (5.7 in)
1967
212.4 mm (8.4 in)
1968
396.7 mm (15.6 in)
1969
360.5 mm (14.2 in)
1970
450.3 mm (17.7 in)
1971
415.3 mm (16.4 in)
1972
116.5 mm (4.6 in)
1973
243.6 mm (9.6 in)
1974
168.1 mm (6.6 in)
1975
146.3 mm (5.8 in)
1976
170.5 mm (6.7 in)
1977
117.9 mm (4.6 in)
1978
169.9 mm (6.7 in)
1979
444.0 mm (17.5 in)
1980
1,066.1 mm (42.0 in)
1981
174.8 mm (6.9 in)
1982
431.1 mm (17.0 in)
1983
163.7 mm (6.4 in)
1984
97.6 mm (3.8 in)
1985
481.5 mm (19.0 in)
1986
617.9 mm (24.3 in)
1987
251.9 mm (9.9 in)
1988
190.0 mm (7.5 in)
1989
373.1 mm (14.7 in)
1990
310.4 mm (12.2 in)
1991
343.7 mm (13.5 in)
1992
153.2 mm (6.0 in)
1993
190.5 mm (7.5 in)
1994
266.2 mm (10.5 in)
1995
59.5 mm (2.3 in)
1996
243.4 mm (9.6 in)
1997
154.9 mm (6.1 in)
1998
133.4 mm (5.3 in)
1999
211.6 mm (8.3 in)
2000
136.2 mm (5.4 in)
2001
254.3 mm (10.0 in)
2002
124.9 mm (4.9 in)
2003
114.8 mm (4.5 in)
2004
191.5 mm (7.5 in)
2005
168.1 mm (6.6 in)
2006
154.5 mm (6.1 in)
2007
86.1 mm (3.4 in)
2008
155.5 mm (6.1 in)
2009
138.9 mm (5.5 in)
2010
120.2 mm (4.7 in)
2011
231.9 mm (9.1 in)
2012
115.6 mm (4.6 in)
2013
15.7 mm (0.6 in)
2014
72.9 mm (2.9 in)
2015
195.7 mm (7.7 in)
2016
98.6 mm (3.9 in)
2017
140.9 mm (5.5 in)
2018
125.8 mm (5.0 in)
2019
77.3 mm (3.0 in)
2020
287.3 mm (11.3 in)
2021
162.6 mm (6.4 in)
2022
48.6 mm (1.9 in)
2023
128.1 mm (5.0 in)
2024
144.2 mm (5.7 in)
2026
60.8 mm (2.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Haleakala Rs 338, 1939 to 2026. The record is 54 days in 2000, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Haleakala Rs 338 by year
Year
Longest dry spell (CDD)
1939
22 days
1940
26 days
1941
28 days
1942
27 days
1943
19 days
1944
31 days
1945
22 days
1946
30 days
1947
28 days
1948
17 days
1949
20 days
1950
22 days
1951
14 days
1952
21 days
1953
36 days
1954
20 days
1955
25 days
1956
15 days
1957
23 days
1958
23 days
1959
29 days
1960
19 days
1961
16 days
1962
45 days
1963
24 days
1964
20 days
1965
14 days
1966
22 days
1967
18 days
1968
21 days
1969
18 days
1970
28 days
1971
39 days
1972
25 days
1973
33 days
1974
12 days
1975
31 days
1976
20 days
1977
25 days
1978
18 days
1979
18 days
1980
24 days
1981
31 days
1982
14 days
1983
51 days
1984
24 days
1985
30 days
1986
16 days
1987
13 days
1988
29 days
1989
23 days
1990
25 days
1991
24 days
1992
26 days
1993
34 days
1994
20 days
1995
18 days
1996
19 days
1997
22 days
1998
27 days
1999
22 days
2000
54 days
2001
30 days
2002
38 days
2003
19 days
2004
17 days
2005
19 days
2006
33 days
2007
22 days
2008
37 days
2009
24 days
2010
35 days
2011
15 days
2012
11 days
2013
4 days
2014
10 days
2015
10 days
2016
6 days
2017
23 days
2018
21 days
2019
12 days
2020
13 days
2021
38 days
2022
20 days
2023
14 days
2024
15 days
2026
2 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
70 years, 1940 to 2021
A day with at least 129.4 mm (5.1 in) of rain is expected about once in 2 years. A day with at least 495.9 mm (19.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Haleakala Rs 338: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
129.4 mm (5.1 in)
5 years
203.6 mm (8.0 in)
10 years
261.1 mm (10.3 in)
25 years
344.9 mm (13.6 in)
50 years
416.2 mm (16.4 in)
100 years
495.9 mm (19.5 in)
Longer than the 70 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, 70 years of values from 1940 to 2021.
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: 469.9 mm (18.5 in) in 1980; 425.2 mm (16.7 in) in 1960; 358.1 mm (14.1 in) in 1968.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Haleakala Rs 338, at 1996. Each is measured against neighbouring stations.
Relative to 3 neighbouring stations, the station's annual mean temperature from 1996 ran 0.3 C (0.5 F) higher than in the years before (possible change).
Suspected changes in the annual mean temperature at Haleakala Rs 338, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1996
+0.3
+0.5
possible
3
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 Haleakala Rs 338 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Haleakala Rs 338 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.