Record envelope, standing records and threshold days for US Magnetic Obsy (USC00518805), Hawaii, United States, with 56 years of record.
Key Facts for US Magnetic Obsy
US Magnetic Obsy (USC00518805) is a weather station in Hawaii, United States at 21.30 latitude and -158.10 longitude, 3 m (10 ft) above sea level.
The station reports from 1905 to 1960, 56 years of record.
1,464 records set at US Magnetic Obsy still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
US Magnetic Obsy tied a daily record high minimum temperature of 22.2 C (72.0 F) on 16 June 1960.
About the Station
Location: Hawaii, United States, 21.30 latitude, -158.10 longitude.
Elevation: 3 m (10 ft).
Period of record: 1905 to 1960, 56 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 US Magnetic Obsy. 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 US Magnetic Obsy, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
8.9 C (48.0 F)
n/a
n/a
Feb
30.0 C (86.0 F)
8.9 C (48.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
9.4 C (48.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
10.0 C (50.0 F)
n/a
n/a
May
31.7 C (89.1 F)
13.9 C (57.0 F)
n/a
n/a
Jun
32.8 C (91.0 F)
15.0 C (59.0 F)
n/a
n/a
Jul
33.3 C (91.9 F)
15.6 C (60.1 F)
n/a
n/a
Aug
33.3 C (91.9 F)
16.7 C (62.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
14.4 C (57.9 F)
n/a
n/a
Oct
33.3 C (91.9 F)
13.3 C (55.9 F)
n/a
n/a
Nov
31.7 C (89.1 F)
11.7 C (53.1 F)
n/a
n/a
Dec
31.7 C (89.1 F)
9.4 C (48.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at US Magnetic Obsy still stand. 1906 holds the most, with 76.
Standing records at US Magnetic Obsy by the year they were set
Year set
Standing records
1905
49
1906
76
1907
53
1908
46
1909
41
1910
45
1911
45
1912
36
1913
39
1914
72
1915
69
1916
37
1917
21
1918
52
1919
46
1920
42
1921
53
1922
29
1923
46
1924
41
1925
49
1949
19
1950
54
1951
51
1952
33
1953
35
1954
42
1955
73
1956
36
1957
41
1958
38
1959
40
1960
15
Wettest Day of Each Month
Mar: 254.0 mm (10.0 in)
The wettest day on record for each calendar month at US Magnetic Obsy. The most was 254.0 mm (10.0 in) on 6 March 1958.
Record daily precipitation for each month at US Magnetic Obsy
Month
Record daily precipitation (mm)
Date
Jan
131.6 mm (5.2 in)
18 January 1916
Feb
166.9 mm (6.6 in)
24 February 1955
Mar
254.0 mm (10.0 in)
6 March 1958
Apr
77.2 mm (3.0 in)
19 April 1918
May
51.8 mm (2.0 in)
20 May 1906
Jun
49.0 mm (1.9 in)
3 June 1913
Jul
20.3 mm (0.8 in)
18 July 1915
Aug
70.6 mm (2.8 in)
17 August 1913
Sep
52.3 mm (2.1 in)
10 September 1910
Oct
79.2 mm (3.1 in)
24 October 1958
Nov
201.2 mm (7.9 in)
29 November 1954
Dec
210.3 mm (8.3 in)
23 December 1920
Period of Record Coverage
1905 to 1960
Complete yearUnder 90 percent of days
33 years of record at US Magnetic Obsy, 1905 to 1960. 2 years have data for under 90 percent of days and are left out of rankings: 1949, 1960.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at US Magnetic Obsy, 1905 to 1959. Blue stripes are years cooler than the station's own mean of 23.8 C (74.8 F); red stripes are warmer. The coolest year was 1955, at 23.1 C (73.5 F), and the warmest was 1915, at 24.2 C (75.5 F). The strongest colour marks a difference of 0.8 C (1.4 F).
Annual mean temperature at US Magnetic Obsy as warming stripes, 1905 to 1959
Year
Annual mean temperature
Difference from the station mean
1905
23.4 C
-0.33 C
1906
24.1 C
+0.33 C
1907
23.9 C
+0.16 C
1908
23.6 C
-0.14 C
1909
23.5 C
-0.32 C
1910
23.5 C
-0.27 C
1911
23.7 C
-0.12 C
1912
24.1 C
+0.28 C
1913
24.1 C
+0.35 C
1914
24.0 C
+0.20 C
1915
24.2 C
+0.39 C
1916
23.9 C
+0.09 C
1917
23.7 C
-0.03 C
1918
24.0 C
+0.22 C
1919
24.1 C
+0.37 C
1920
24.0 C
+0.26 C
1921
23.8 C
+0.02 C
1922
23.9 C
+0.16 C
1923
23.7 C
-0.11 C
1924
23.4 C
-0.38 C
1925
23.8 C
+0.04 C
1950
23.4 C
-0.41 C
1951
23.6 C
-0.13 C
1952
23.5 C
-0.24 C
1953
23.7 C
-0.11 C
1954
23.8 C
+0.03 C
1955
23.1 C
-0.70 C
1956
23.9 C
+0.10 C
1957
23.9 C
+0.10 C
1958
23.7 C
-0.12 C
1959
24.2 C
+0.38 C
The fitted trend in annual mean temperature here over 1905 to 1959 is -0.03 C (-0.08 to 0.02) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.06 F (-0.15 to 0.03) 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 US Magnetic Obsy
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.03 C (-0.08 to 0.02) per decade
-0.06 F (-0.15 to 0.03) per decade
1905 to 1959
31
Not clearly different from zero
Mean daily maximum
0.05 C (-0.01 to 0.11) per decade
0.08 F (-0.03 to 0.19) per decade
1905 to 1959
31
Not clearly different from zero
Mean daily minimum
-0.1 C (-0.2 to -0.1) per decade
-0.2 F (-0.3 to -0.1) per decade
1905 to 1959
31
Fall
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 1960
Yearly extremes at US Magnetic Obsy: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.3 C (91.9 F)
1915
32.8 C (91.0 F)
33
Coldest night (TNn)
8.9 C (48.0 F)
1951
11.1 C (52.0 F)
33
Wettest day (Rx1day)
254.0 mm (10.0 in)
1958
77.2 mm (3.0 in)
33
Wettest five days (Rx5day)
317.8 mm (12.5 in)
1957
125.5 mm (4.9 in)
33
Longest dry spell (CDD)
144 days
1953
50 days
33
Hottest day (TXx)
The hottest day of the year at US Magnetic Obsy, 1905 to 1960. The record is 33.3 C (91.9 F) in 1915, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at US Magnetic Obsy by year
Year
Hottest day (TXx)
1905
32.2 C (90.0 F)
1906
32.8 C (91.0 F)
1907
32.8 C (91.0 F)
1908
32.2 C (90.0 F)
1909
31.7 C (89.1 F)
1910
32.2 C (90.0 F)
1911
32.8 C (91.0 F)
1912
32.8 C (91.0 F)
1913
32.8 C (91.0 F)
1914
32.8 C (91.0 F)
1915
33.3 C (91.9 F)
1916
32.2 C (90.0 F)
1917
32.8 C (91.0 F)
1918
33.3 C (91.9 F)
1919
33.3 C (91.9 F)
1920
31.7 C (89.1 F)
1921
32.8 C (91.0 F)
1922
32.8 C (91.0 F)
1923
33.3 C (91.9 F)
1924
32.2 C (90.0 F)
1925
32.2 C (90.0 F)
1949
30.6 C (87.1 F)
1950
31.7 C (89.1 F)
1951
32.2 C (90.0 F)
1952
32.8 C (91.0 F)
1953
32.2 C (90.0 F)
1954
32.8 C (91.0 F)
1955
31.7 C (89.1 F)
1956
32.2 C (90.0 F)
1957
32.2 C (90.0 F)
1958
33.3 C (91.9 F)
1959
33.3 C (91.9 F)
1960
31.7 C (89.1 F)
Coldest night (TNn)
The coldest night of the year at US Magnetic Obsy, 1905 to 1960. The record is 8.9 C (48.0 F) in 1951, marked on the chart; the median year is 11.1 C (52.0 F).
Coldest night (TNn) at US Magnetic Obsy by year
Year
Coldest night (TNn)
1905
9.4 C (48.9 F)
1906
11.1 C (52.0 F)
1907
12.2 C (54.0 F)
1908
12.2 C (54.0 F)
1909
10.0 C (50.0 F)
1910
10.6 C (51.1 F)
1911
12.2 C (54.0 F)
1912
12.2 C (54.0 F)
1913
12.2 C (54.0 F)
1914
10.6 C (51.1 F)
1915
10.0 C (50.0 F)
1916
11.7 C (53.1 F)
1917
11.1 C (52.0 F)
1918
12.2 C (54.0 F)
1919
11.1 C (52.0 F)
1920
13.3 C (55.9 F)
1921
12.2 C (54.0 F)
1922
12.2 C (54.0 F)
1923
10.6 C (51.1 F)
1924
10.6 C (51.1 F)
1925
12.8 C (55.0 F)
1949
11.1 C (52.0 F)
1950
11.1 C (52.0 F)
1951
8.9 C (48.0 F)
1952
11.1 C (52.0 F)
1953
11.7 C (53.1 F)
1954
9.4 C (48.9 F)
1955
10.0 C (50.0 F)
1956
12.8 C (55.0 F)
1957
10.6 C (51.1 F)
1958
10.0 C (50.0 F)
1959
8.9 C (48.0 F)
1960
10.6 C (51.1 F)
Wettest day (Rx1day)
The wettest day of the year at US Magnetic Obsy, 1905 to 1960. The record is 254.0 mm (10.0 in) in 1958, marked on the chart; the median year is 77.2 mm (3.0 in).
Wettest day (Rx1day) at US Magnetic Obsy by year
Year
Wettest day (Rx1day)
1905
51.8 mm (2.0 in)
1906
116.1 mm (4.6 in)
1907
89.2 mm (3.5 in)
1908
106.2 mm (4.2 in)
1909
59.9 mm (2.4 in)
1910
61.2 mm (2.4 in)
1911
61.0 mm (2.4 in)
1912
19.8 mm (0.8 in)
1913
70.6 mm (2.8 in)
1914
65.5 mm (2.6 in)
1915
83.3 mm (3.3 in)
1916
131.6 mm (5.2 in)
1917
138.4 mm (5.4 in)
1918
77.2 mm (3.0 in)
1919
40.9 mm (1.6 in)
1920
210.3 mm (8.3 in)
1921
56.9 mm (2.2 in)
1922
50.0 mm (2.0 in)
1923
95.3 mm (3.8 in)
1924
50.8 mm (2.0 in)
1925
39.9 mm (1.6 in)
1949
71.6 mm (2.8 in)
1950
126.0 mm (5.0 in)
1951
114.8 mm (4.5 in)
1952
82.6 mm (3.3 in)
1953
46.0 mm (1.8 in)
1954
201.2 mm (7.9 in)
1955
166.9 mm (6.6 in)
1956
78.7 mm (3.1 in)
1957
124.7 mm (4.9 in)
1958
254.0 mm (10.0 in)
1959
63.5 mm (2.5 in)
1960
49.8 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at US Magnetic Obsy, 1905 to 1960. The record is 317.8 mm (12.5 in) in 1957, marked on the chart; the median year is 125.5 mm (4.9 in).
Wettest five days (Rx5day) at US Magnetic Obsy by year
Year
Wettest five days (Rx5day)
1905
52.1 mm (2.1 in)
1906
162.9 mm (6.4 in)
1907
181.1 mm (7.1 in)
1908
241.6 mm (9.5 in)
1909
109.7 mm (4.3 in)
1910
114.3 mm (4.5 in)
1911
115.6 mm (4.6 in)
1912
18.8 mm (0.7 in)
1913
75.4 mm (3.0 in)
1914
82.3 mm (3.2 in)
1915
175.5 mm (6.9 in)
1916
229.7 mm (9.0 in)
1917
278.7 mm (11.0 in)
1918
160.1 mm (6.3 in)
1919
41.9 mm (1.6 in)
1920
245.1 mm (9.6 in)
1921
125.5 mm (4.9 in)
1922
50.0 mm (2.0 in)
1923
134.1 mm (5.3 in)
1924
70.9 mm (2.8 in)
1925
61.7 mm (2.4 in)
1949
99.8 mm (3.9 in)
1950
213.9 mm (8.4 in)
1951
195.3 mm (7.7 in)
1952
95.8 mm (3.8 in)
1953
61.5 mm (2.4 in)
1954
207.6 mm (8.2 in)
1955
296.0 mm (11.7 in)
1956
142.0 mm (5.6 in)
1957
317.8 mm (12.5 in)
1958
316.8 mm (12.5 in)
1959
76.4 mm (3.0 in)
1960
54.3 mm (2.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at US Magnetic Obsy, 1905 to 1960. The record is 144 days in 1953, marked on the chart; the median year is 50 days.
Longest dry spell (CDD) at US Magnetic Obsy by year
Year
Longest dry spell (CDD)
1905
47 days
1906
36 days
1907
51 days
1908
86 days
1909
92 days
1910
38 days
1911
54 days
1912
31 days
1913
26 days
1914
47 days
1915
46 days
1916
38 days
1917
71 days
1918
53 days
1919
42 days
1920
50 days
1921
38 days
1922
57 days
1923
69 days
1924
41 days
1925
48 days
1949
31 days
1950
42 days
1951
58 days
1952
77 days
1953
144 days
1954
56 days
1955
77 days
1956
50 days
1957
89 days
1958
112 days
1959
66 days
1960
31 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 US Magnetic Obsy standing records by year: CSV or JSON. Field meanings are on the data page.
Data for US Magnetic Obsy 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.