Record envelope, standing records and threshold days for Mahukona 159 (USC00515721), Hawaii, United States, with 44 years of record.
Key Facts for Mahukona 159
Mahukona 159 (USC00515721) is a weather station in Hawaii, United States at 20.18 latitude and -155.90 longitude, 3 m (10 ft) above sea level.
The station reports from 1912 to 1955, 44 years of record.
1,464 records set at Mahukona 159 still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Mahukona 159 tied a daily record low maximum temperature of 27.8 C (82.0 F) on 22 November 1955.
About the Station
Location: Hawaii, United States, 20.18 latitude, -155.90 longitude.
Elevation: 3 m (10 ft).
Period of record: 1912 to 1955, 44 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 Mahukona 159. 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 Mahukona 159, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
33.9 C (93.0 F)
11.1 C (52.0 F)
n/a
n/a
Feb
34.4 C (93.9 F)
13.3 C (55.9 F)
n/a
n/a
Mar
35.0 C (95.0 F)
12.8 C (55.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
12.2 C (54.0 F)
n/a
n/a
May
35.6 C (96.1 F)
15.6 C (60.1 F)
n/a
n/a
Jun
36.7 C (98.1 F)
15.6 C (60.1 F)
n/a
n/a
Jul
36.7 C (98.1 F)
17.2 C (63.0 F)
n/a
n/a
Aug
36.7 C (98.1 F)
17.8 C (64.0 F)
n/a
n/a
Sep
36.1 C (97.0 F)
14.4 C (57.9 F)
n/a
n/a
Oct
36.1 C (97.0 F)
15.6 C (60.1 F)
n/a
n/a
Nov
35.6 C (96.1 F)
15.6 C (60.1 F)
n/a
n/a
Dec
36.1 C (97.0 F)
11.7 C (53.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Mahukona 159 still stand. 1915 holds the most, with 144.
Standing records at Mahukona 159 by the year they were set
Year set
Standing records
1912
24
1913
60
1914
44
1915
144
1916
42
1917
111
1918
58
1919
99
1920
98
1921
27
1922
59
1923
9
1924
5
1925
7
1926
9
1927
13
1928
21
1929
15
1931
25
1932
11
1933
93
1934
16
1935
13
1936
11
1937
17
1938
23
1939
12
1940
98
1941
37
1942
36
1943
36
1944
25
1945
4
1946
19
1947
12
1948
30
1949
19
1950
20
1951
17
1952
14
1953
7
1954
15
1955
9
Wettest Day of Each Month
Apr: 119.4 mm (4.7 in)
The wettest day on record for each calendar month at Mahukona 159. The most was 119.4 mm (4.7 in) on 28 April 1916.
Record daily precipitation for each month at Mahukona 159
Month
Record daily precipitation (mm)
Date
Jan
102.9 mm (4.1 in)
30 January 1937
Feb
57.2 mm (2.3 in)
18 February 1921
Mar
87.4 mm (3.4 in)
27 March 1930
Apr
119.4 mm (4.7 in)
28 April 1916
May
54.6 mm (2.1 in)
20 May 1938
Jun
39.6 mm (1.6 in)
14 June 1944
Jul
63.5 mm (2.5 in)
21 July 1931
Aug
33.0 mm (1.3 in)
18 August 1931
Sep
38.1 mm (1.5 in)
20 September 1930
Oct
53.8 mm (2.1 in)
30 October 1942
Nov
68.6 mm (2.7 in)
15 November 1950
Dec
110.5 mm (4.4 in)
16 December 1929
Period of Record Coverage
1912 to 1955
Complete yearUnder 90 percent of days
44 years of record at Mahukona 159, 1912 to 1955. 9 years have data for under 90 percent of days and are left out of rankings: 1912, 1923, 1924, 1927, 1928, 1929, 1939, 1943 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Mahukona 159, 1913 to 1955. Blue stripes are years cooler than the station's own mean of 25.1 C (77.1 F); red stripes are warmer. The coolest year was 1948, at 24.3 C (75.7 F), and the warmest was 1940, at 26.8 C (80.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Mahukona 159 as warming stripes, 1913 to 1955
Year
Annual mean temperature
Difference from the station mean
1913
25.2 C
+0.17 C
1914
25.1 C
+0.04 C
1916
25.4 C
+0.38 C
1918
25.0 C
-0.03 C
1919
25.1 C
+0.01 C
1920
24.4 C
-0.68 C
1922
24.4 C
-0.61 C
1925
25.4 C
+0.38 C
1926
25.0 C
-0.09 C
1931
25.2 C
+0.18 C
1934
25.9 C
+0.85 C
1937
25.1 C
+0.04 C
1938
25.7 C
+0.61 C
1940
26.8 C
+1.70 C
1941
26.1 C
+1.05 C
1942
25.1 C
+0.04 C
1945
24.8 C
-0.30 C
1946
24.3 C
-0.73 C
1947
24.4 C
-0.63 C
1948
24.3 C
-0.80 C
1950
24.8 C
-0.23 C
1952
24.4 C
-0.68 C
1954
25.1 C
+0.04 C
1955
24.4 C
-0.66 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
1912 to 1955
Yearly extremes at Mahukona 159: 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)
1915
33.9 C (93.0 F)
44
Coldest night (TNn)
11.1 C (52.0 F)
1920
15.6 C (60.1 F)
44
Wettest day (Rx1day)
119.4 mm (4.7 in)
1916
51.5 mm (2.0 in)
44
Wettest five days (Rx5day)
202.0 mm (8.0 in)
1916
74.4 mm (2.9 in)
44
Longest dry spell (CDD)
127 days
1939
53 days
44
Hottest day (TXx)
The hottest day of the year at Mahukona 159, 1912 to 1955. The record is 36.7 C (98.1 F) in 1915, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Mahukona 159 by year
Year
Hottest day (TXx)
1912
34.4 C (93.9 F)
1913
36.1 C (97.0 F)
1914
33.3 C (91.9 F)
1915
36.7 C (98.1 F)
1916
35.6 C (96.1 F)
1917
36.1 C (97.0 F)
1918
36.1 C (97.0 F)
1919
36.1 C (97.0 F)
1920
35.6 C (96.1 F)
1921
35.0 C (95.0 F)
1922
35.6 C (96.1 F)
1923
33.9 C (93.0 F)
1924
34.4 C (93.9 F)
1925
34.4 C (93.9 F)
1926
34.4 C (93.9 F)
1927
32.2 C (90.0 F)
1928
33.3 C (91.9 F)
1929
33.9 C (93.0 F)
1930
33.9 C (93.0 F)
1931
33.9 C (93.0 F)
1932
34.4 C (93.9 F)
1933
32.8 C (91.0 F)
1934
34.4 C (93.9 F)
1935
36.1 C (97.0 F)
1936
35.6 C (96.1 F)
1937
32.8 C (91.0 F)
1938
33.9 C (93.0 F)
1939
33.9 C (93.0 F)
1940
35.0 C (95.0 F)
1941
35.6 C (96.1 F)
1942
32.2 C (90.0 F)
1943
31.7 C (89.1 F)
1944
31.7 C (89.1 F)
1945
32.2 C (90.0 F)
1946
32.2 C (90.0 F)
1947
32.8 C (91.0 F)
1948
32.2 C (90.0 F)
1949
32.8 C (91.0 F)
1950
32.8 C (91.0 F)
1951
33.3 C (91.9 F)
1952
32.2 C (90.0 F)
1953
32.8 C (91.0 F)
1954
35.6 C (96.1 F)
1955
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Mahukona 159, 1912 to 1955. The record is 11.1 C (52.0 F) in 1920, marked on the chart; the median year is 15.6 C (60.1 F).
Coldest night (TNn) at Mahukona 159 by year
Year
Coldest night (TNn)
1912
16.1 C (61.0 F)
1913
15.6 C (60.1 F)
1914
15.6 C (60.1 F)
1915
14.4 C (57.9 F)
1916
15.6 C (60.1 F)
1917
17.2 C (63.0 F)
1918
15.6 C (60.1 F)
1919
11.7 C (53.1 F)
1920
11.1 C (52.0 F)
1921
13.3 C (55.9 F)
1922
12.8 C (55.0 F)
1923
14.4 C (57.9 F)
1924
17.8 C (64.0 F)
1925
16.7 C (62.1 F)
1926
16.7 C (62.1 F)
1927
14.4 C (57.9 F)
1928
17.8 C (64.0 F)
1929
15.6 C (60.1 F)
1930
15.0 C (59.0 F)
1931
15.6 C (60.1 F)
1932
17.2 C (63.0 F)
1933
12.2 C (54.0 F)
1934
16.1 C (61.0 F)
1935
16.7 C (62.1 F)
1936
16.7 C (62.1 F)
1937
16.1 C (61.0 F)
1938
17.2 C (63.0 F)
1939
17.8 C (64.0 F)
1940
17.2 C (63.0 F)
1941
17.2 C (63.0 F)
1942
16.7 C (62.1 F)
1943
17.2 C (63.0 F)
1944
15.0 C (59.0 F)
1945
16.1 C (61.0 F)
1946
15.6 C (60.1 F)
1947
15.6 C (60.1 F)
1948
15.6 C (60.1 F)
1949
14.4 C (57.9 F)
1950
15.6 C (60.1 F)
1951
14.4 C (57.9 F)
1952
16.1 C (61.0 F)
1953
15.6 C (60.1 F)
1954
15.6 C (60.1 F)
1955
15.6 C (60.1 F)
Wettest day (Rx1day)
The wettest day of the year at Mahukona 159, 1912 to 1955. The record is 119.4 mm (4.7 in) in 1916, marked on the chart; the median year is 51.5 mm (2.0 in).
Wettest day (Rx1day) at Mahukona 159 by year
Year
Wettest day (Rx1day)
1912
6.4 mm (0.25 in)
1913
29.0 mm (1.1 in)
1914
52.8 mm (2.1 in)
1915
40.6 mm (1.6 in)
1916
119.4 mm (4.7 in)
1917
44.5 mm (1.8 in)
1918
71.1 mm (2.8 in)
1919
52.8 mm (2.1 in)
1920
79.2 mm (3.1 in)
1921
57.2 mm (2.3 in)
1922
46.5 mm (1.8 in)
1923
110.5 mm (4.4 in)
1924
66.0 mm (2.6 in)
1925
16.5 mm (0.6 in)
1926
35.6 mm (1.4 in)
1927
89.7 mm (3.5 in)
1928
29.2 mm (1.1 in)
1929
110.5 mm (4.4 in)
1930
87.4 mm (3.4 in)
1931
63.5 mm (2.5 in)
1932
100.3 mm (3.9 in)
1933
22.9 mm (0.9 in)
1934
41.9 mm (1.6 in)
1935
34.3 mm (1.4 in)
1936
64.3 mm (2.5 in)
1937
102.9 mm (4.1 in)
1938
57.9 mm (2.3 in)
1939
50.8 mm (2.0 in)
1940
64.3 mm (2.5 in)
1941
33.0 mm (1.3 in)
1942
53.8 mm (2.1 in)
1943
48.0 mm (1.9 in)
1944
81.3 mm (3.2 in)
1945
50.8 mm (2.0 in)
1946
35.8 mm (1.4 in)
1947
50.8 mm (2.0 in)
1948
52.1 mm (2.1 in)
1949
30.5 mm (1.2 in)
1950
68.6 mm (2.7 in)
1951
63.5 mm (2.5 in)
1952
47.0 mm (1.9 in)
1953
34.5 mm (1.4 in)
1954
33.0 mm (1.3 in)
1955
47.2 mm (1.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mahukona 159, 1912 to 1955. The record is 202.0 mm (8.0 in) in 1916, marked on the chart; the median year is 74.4 mm (2.9 in).
Wettest five days (Rx5day) at Mahukona 159 by year
Year
Wettest five days (Rx5day)
1912
10.2 mm (0.4 in)
1913
54.4 mm (2.1 in)
1914
81.8 mm (3.2 in)
1915
50.8 mm (2.0 in)
1916
202.0 mm (8.0 in)
1917
73.2 mm (2.9 in)
1918
120.2 mm (4.7 in)
1919
55.1 mm (2.2 in)
1920
108.4 mm (4.3 in)
1921
81.6 mm (3.2 in)
1922
64.0 mm (2.5 in)
1923
175.6 mm (6.9 in)
1924
75.9 mm (3.0 in)
1925
13.2 mm (0.5 in)
1926
46.6 mm (1.8 in)
1927
22.9 mm (0.9 in)
1928
42.1 mm (1.7 in)
1929
121.4 mm (4.8 in)
1930
100.1 mm (3.9 in)
1931
63.5 mm (2.5 in)
1932
100.3 mm (3.9 in)
1933
30.5 mm (1.2 in)
1934
42.9 mm (1.7 in)
1935
42.1 mm (1.7 in)
1936
105.2 mm (4.1 in)
1937
108.0 mm (4.3 in)
1938
69.6 mm (2.7 in)
1939
83.1 mm (3.3 in)
1940
76.2 mm (3.0 in)
1941
54.9 mm (2.2 in)
1942
102.0 mm (4.0 in)
1943
66.3 mm (2.6 in)
1944
115.8 mm (4.6 in)
1945
75.2 mm (3.0 in)
1946
107.3 mm (4.2 in)
1947
50.8 mm (2.0 in)
1948
100.3 mm (3.9 in)
1949
87.4 mm (3.4 in)
1950
124.8 mm (4.9 in)
1951
86.3 mm (3.4 in)
1952
55.9 mm (2.2 in)
1953
61.7 mm (2.4 in)
1954
61.7 mm (2.4 in)
1955
73.6 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mahukona 159, 1912 to 1955. The record is 127 days in 1939, marked on the chart; the median year is 53 days.
Longest dry spell (CDD) at Mahukona 159 by year
Year
Longest dry spell (CDD)
1912
57 days
1913
43 days
1914
28 days
1915
46 days
1916
47 days
1917
83 days
1918
62 days
1919
95 days
1920
56 days
1921
51 days
1922
91 days
1923
96 days
1924
45 days
1925
74 days
1926
63 days
1927
53 days
1928
52 days
1929
24 days
1930
34 days
1931
34 days
1932
44 days
1933
30 days
1934
30 days
1935
28 days
1936
32 days
1937
67 days
1938
38 days
1939
127 days
1940
62 days
1941
65 days
1942
69 days
1943
54 days
1944
54 days
1945
91 days
1946
32 days
1947
51 days
1948
80 days
1949
92 days
1950
57 days
1951
51 days
1952
44 days
1953
43 days
1954
33 days
1955
55 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 Mahukona 159 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mahukona 159 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.