Station Number 44301
Prefecture Tokyo [ Local Portal ]
Location 東京都小笠原村父島字西町 父島気象観測所 (OGASAWARA MURA, TOKYO TO)
Months of Observations 373
Number of Observations 272,075
Period of Observations
Period Name Lat. Long. Height Anemometer
1986/03/18 -- 2017/03/99 CHICHIJIMA 27.092N 142.190E 3m 15.8m
Real-time Data AMeRAS (AMeDAS Ranking Service)
Past Heavy Rain Data AMeDAS heavy rain
Weather Disaster Reports
Typhoon History
Neighbor Stations
Number Name Distance Azimuth

Statistics for the Whole Period

Precipitation

0.0mm - 0.4mm 0.0mm - 0.4mm = 258,599
[258,599 (95.05% / 95.06%)] [258,599 / 272,044 (95.06%)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 6,902
[6,902 (2.54% / 2.54%)] [265,501 / 13,445 (97.59%)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 2,192
[2,192 (0.81% / 0.81%)] [267,693 / 6,543 (98.40%)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 1,228
[1,228 (0.45% / 0.45%)] [268,921 / 4,351 (98.85%)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 763
[763 (0.28% / 0.28%)] [269,684 / 3,123 (99.13%)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 537
[537 (0.20% / 0.20%)] [270,221 / 2,360 (99.33%)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 377
[377 (0.14% / 0.14%)] [270,598 / 1,823 (99.47%)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 276
[276 (0.10% / 0.10%)] [270,874 / 1,446 (99.57%)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 212
[212 (0.08% / 0.08%)] [271,086 / 1,170 (99.65%)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 155
[155 (0.06% / 0.06%)] [271,241 / 958 (99.70%)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 136
[136 (0.05% / 0.05%)] [271,377 / 803 (99.75%)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 123
[123 (0.05% / 0.05%)] [271,500 / 667 (99.80%)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 85
[85 (0.03% / 0.03%)] [271,585 / 544 (99.83%)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 67
[67 (0.02% / 0.02%)] [271,652 / 459 (99.86%)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 54
[54 (0.02% / 0.02%)] [271,706 / 392 (99.88%)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 44
[44 (0.02% / 0.02%)] [271,750 / 338 (99.89%)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 35
[35 (0.01% / 0.01%)] [271,785 / 294 (99.90%)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 29
[29 (0.01% / 0.01%)] [271,814 / 259 (99.92%)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 24
[24 (0.01% / 0.01%)] [271,838 / 230 (99.92%)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 21
[21 (0.01% / 0.01%)] [271,859 / 206 (99.93%)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 14
[14 (0.01% / 0.01%)] [271,873 / 185 (99.94%)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 16
[16 (0.01% / 0.01%)] [271,889 / 171 (99.94%)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 26
[26 (0.01% / 0.01%)] [271,915 / 155 (99.95%)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 16
[16 (0.01% / 0.01%)] [271,931 / 129 (99.96%)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 16
[16 (0.01% / 0.01%)] [271,947 / 113 (99.96%)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 13
[13 (0.00% / 0.00%)] [271,960 / 97 (99.97%)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 13
[13 (0.00% / 0.00%)] [271,973 / 84 (99.97%)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 5
[5 (0.00% / 0.00%)] [271,978 / 71 (99.98%)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 4
[4 (0.00% / 0.00%)] [271,982 / 66 (99.98%)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 7
[7 (0.00% / 0.00%)] [271,989 / 62 (99.98%)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 6
[6 (0.00% / 0.00%)] [271,995 / 55 (99.98%)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 4
[4 (0.00% / 0.00%)] [271,999 / 49 (99.98%)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 3
[3 (0.00% / 0.00%)] [272,002 / 45 (99.98%)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 4
[4 (0.00% / 0.00%)] [272,006 / 42 (99.99%)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 1
[1 (0.00% / 0.00%)] [272,007 / 38 (99.99%)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 3
[3 (0.00% / 0.00%)] [272,010 / 37 (99.99%)]
35.5mm - 36.4mm 35.5mm - 36.4mm = 3
[3 (0.00% / 0.00%)] [272,013 / 34 (99.99%)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 3
[3 (0.00% / 0.00%)] [272,016 / 31 (99.99%)]
37.5mm - 38.4mm 37.5mm - 38.4mm = 2
[2 (0.00% / 0.00%)] [272,018 / 28 (99.99%)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 6
[6 (0.00% / 0.00%)] [272,024 / 26 (99.99%)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 3
[3 (0.00% / 0.00%)] [272,027 / 20 (99.99%)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 1
[1 (0.00% / 0.00%)] [272,028 / 17 (99.99%)]
41.5mm - 42.4mm 41.5mm - 42.4mm = 5
[5 (0.00% / 0.00%)] [272,033 / 16 (100.00%)]
42.5mm - 43.4mm 42.5mm - 43.4mm = 1
[1 (0.00% / 0.00%)] [272,034 / 11 (100.00%)]
45.5mm - 46.4mm 45.5mm - 46.4mm = 2
[2 (0.00% / 0.00%)] [272,036 / 10 (100.00%)]
48.5mm - 49.4mm 48.5mm - 49.4mm = 2
[2 (0.00% / 0.00%)] [272,038 / 8 (100.00%)]
49.5mm - 50.4mm 49.5mm - 50.4mm = 2
[2 (0.00% / 0.00%)] [272,040 / 6 (100.00%)]
51.5mm - 52.4mm 51.5mm - 52.4mm = 1
[1 (0.00% / 0.00%)] [272,041 / 4 (100.00%)]
55.5mm - 56.4mm 55.5mm - 56.4mm = 1
[1 (0.00% / 0.00%)] [272,042 / 3 (100.00%)]
70.5mm - 71.4mm 70.5mm - 71.4mm = 1
[1 (0.00% / 0.00%)] [272,043 / 2 (100.00%)]
78.5mm - 79.4mm 78.5mm - 79.4mm = 1
[1 (0.00% / 0.00%)] [272,044 / 1 (100.00%)]

Missing observations (31 / 0.01%)

Wind Direction

Calm Calm = 5,023
[5,023 (1.85% / 1.85%)] [0 / 0 (NA)]
NNE NNE = 20,845
[20,845 (7.66% / 7.66%)] [0 / 0 (NA)]
NE NE = 22,874
[22,874 (8.41% / 8.41%)] [0 / 0 (NA)]
ENE ENE = 31,606
[31,606 (11.62% / 11.62%)] [0 / 0 (NA)]
E E = 17,463
[17,463 (6.42% / 6.42%)] [0 / 0 (NA)]
ESE ESE = 18,070
[18,070 (6.64% / 6.64%)] [0 / 0 (NA)]
SE SE = 19,741
[19,741 (7.26% / 7.26%)] [0 / 0 (NA)]
SSE SSE = 17,336
[17,336 (6.37% / 6.37%)] [0 / 0 (NA)]
S S = 32,215
[32,215 (11.84% / 11.84%)] [0 / 0 (NA)]
SSW SSW = 15,752
[15,752 (5.79% / 5.79%)] [0 / 0 (NA)]
SW SW = 8,686
[8,686 (3.19% / 3.19%)] [0 / 0 (NA)]
WSW WSW = 2,812
[2,812 (1.03% / 1.03%)] [0 / 0 (NA)]
W W = 2,692
[2,692 (0.99% / 0.99%)] [0 / 0 (NA)]
WNW WNW = 5,860
[5,860 (2.15% / 2.15%)] [0 / 0 (NA)]
NW NW = 19,657
[19,657 (7.22% / 7.23%)] [0 / 0 (NA)]
NNW NNW = 14,443
[14,443 (5.31% / 5.31%)] [0 / 0 (NA)]
N N = 16,961
[16,961 (6.23% / 6.23%)] [0 / 0 (NA)]

Missing observations (39 / 0.01%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 5,652
[5,652 (2.08% / 2.08%)] [5,652 / 272,044 (2.08%)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 41,755
[41,755 (15.35% / 15.35%)] [47,407 / 266,392 (17.43%)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 57,013
[57,013 (20.95% / 20.96%)] [104,420 / 224,637 (38.38%)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 60,207
[60,207 (22.13% / 22.13%)] [164,627 / 167,624 (60.51%)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 46,503
[46,503 (17.09% / 17.09%)] [211,130 / 107,417 (77.61%)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 27,577
[27,577 (10.14% / 10.14%)] [238,707 / 60,914 (87.75%)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 15,422
[15,422 (5.67% / 5.67%)] [254,129 / 33,337 (93.41%)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 8,552
[8,552 (3.14% / 3.14%)] [262,681 / 17,915 (96.56%)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 4,418
[4,418 (1.62% / 1.62%)] [267,099 / 9,363 (98.18%)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,242
[2,242 (0.82% / 0.82%)] [269,341 / 4,945 (99.01%)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,211
[1,211 (0.45% / 0.45%)] [270,552 / 2,703 (99.45%)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 632
[632 (0.23% / 0.23%)] [271,184 / 1,492 (99.68%)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 335
[335 (0.12% / 0.12%)] [271,519 / 860 (99.81%)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 199
[199 (0.07% / 0.07%)] [271,718 / 525 (99.88%)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 104
[104 (0.04% / 0.04%)] [271,822 / 326 (99.92%)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 60
[60 (0.02% / 0.02%)] [271,882 / 222 (99.94%)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 43
[43 (0.02% / 0.02%)] [271,925 / 162 (99.96%)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 27
[27 (0.01% / 0.01%)] [271,952 / 119 (99.97%)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 19
[19 (0.01% / 0.01%)] [271,971 / 92 (99.97%)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 15
[15 (0.01% / 0.01%)] [271,986 / 73 (99.98%)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 17
[17 (0.01% / 0.01%)] [272,003 / 58 (99.98%)]
20.5m/s - 21.4m/s 20.5m/s - 21.4m/s = 10
[10 (0.00% / 0.00%)] [272,013 / 41 (99.99%)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 4
[4 (0.00% / 0.00%)] [272,017 / 31 (99.99%)]
22.5m/s - 23.4m/s 22.5m/s - 23.4m/s = 6
[6 (0.00% / 0.00%)] [272,023 / 27 (99.99%)]
23.5m/s - 24.4m/s 23.5m/s - 24.4m/s = 5
[5 (0.00% / 0.00%)] [272,028 / 21 (99.99%)]
24.5m/s - 25.4m/s 24.5m/s - 25.4m/s = 5
[5 (0.00% / 0.00%)] [272,033 / 16 (100.00%)]
25.5m/s - 26.4m/s 25.5m/s - 26.4m/s = 2
[2 (0.00% / 0.00%)] [272,035 / 11 (100.00%)]
26.5m/s - 27.4m/s 26.5m/s - 27.4m/s = 2
[2 (0.00% / 0.00%)] [272,037 / 9 (100.00%)]
27.5m/s - 28.4m/s 27.5m/s - 28.4m/s = 3
[3 (0.00% / 0.00%)] [272,040 / 7 (100.00%)]
28.5m/s - 29.4m/s 28.5m/s - 29.4m/s = 4
[4 (0.00% / 0.00%)] [272,044 / 4 (100.00%)]

Missing observations (31 / 0.01%)

Temperature

9.5C - 10.4C 9.5C - 10.4C = 6
[6 (0.00% / 0.00%)] [6 / 272,027 (0.00%)]
10.5C - 11.4C 10.5C - 11.4C = 55
[55 (0.02% / 0.02%)] [61 / 272,021 (0.02%)]
11.5C - 12.4C 11.5C - 12.4C = 293
[293 (0.11% / 0.11%)] [354 / 271,966 (0.13%)]
12.5C - 13.4C 12.5C - 13.4C = 788
[788 (0.29% / 0.29%)] [1,142 / 271,673 (0.42%)]
13.5C - 14.4C 13.5C - 14.4C = 1,769
[1,769 (0.65% / 0.65%)] [2,911 / 270,885 (1.07%)]
14.5C - 15.4C 14.5C - 15.4C = 3,926
[3,926 (1.44% / 1.44%)] [6,837 / 269,116 (2.51%)]
15.5C - 16.4C 15.5C - 16.4C = 7,100
[7,100 (2.61% / 2.61%)] [13,937 / 265,190 (5.12%)]
16.5C - 17.4C 16.5C - 17.4C = 10,711
[10,711 (3.94% / 3.94%)] [24,648 / 258,090 (9.06%)]
17.5C - 18.4C 17.5C - 18.4C = 14,969
[14,969 (5.50% / 5.50%)] [39,617 / 247,379 (14.56%)]
18.5C - 19.4C 18.5C - 19.4C = 17,659
[17,659 (6.49% / 6.49%)] [57,276 / 232,410 (21.06%)]
19.5C - 20.4C 19.5C - 20.4C = 19,500
[19,500 (7.17% / 7.17%)] [76,776 / 214,751 (28.22%)]
20.5C - 21.4C 20.5C - 21.4C = 19,520
[19,520 (7.17% / 7.18%)] [96,296 / 195,251 (35.40%)]
21.5C - 22.4C 21.5C - 22.4C = 18,799
[18,799 (6.91% / 6.91%)] [115,095 / 175,731 (42.31%)]
22.5C - 23.4C 22.5C - 23.4C = 17,293
[17,293 (6.36% / 6.36%)] [132,388 / 156,932 (48.67%)]
23.5C - 24.4C 23.5C - 24.4C = 17,768
[17,768 (6.53% / 6.53%)] [150,156 / 139,639 (55.20%)]
24.5C - 25.4C 24.5C - 25.4C = 19,846
[19,846 (7.29% / 7.30%)] [170,002 / 121,871 (62.49%)]
25.5C - 26.4C 25.5C - 26.4C = 23,563
[23,563 (8.66% / 8.66%)] [193,565 / 102,025 (71.16%)]
26.5C - 27.4C 26.5C - 27.4C = 27,819
[27,819 (10.22% / 10.23%)] [221,384 / 78,462 (81.38%)]
27.5C - 28.4C 27.5C - 28.4C = 27,129
[27,129 (9.97% / 9.97%)] [248,513 / 50,643 (91.36%)]
28.5C - 29.4C 28.5C - 29.4C = 15,486
[15,486 (5.69% / 5.69%)] [263,999 / 23,514 (97.05%)]
29.5C - 30.4C 29.5C - 30.4C = 6,257
[6,257 (2.30% / 2.30%)] [270,256 / 8,028 (99.35%)]
30.5C - 31.4C 30.5C - 31.4C = 1,581
[1,581 (0.58% / 0.58%)] [271,837 / 1,771 (99.93%)]
31.5C - 32.4C 31.5C - 32.4C = 175
[175 (0.06% / 0.06%)] [272,012 / 190 (99.99%)]
32.5C - 33.4C 32.5C - 33.4C = 14
[14 (0.01% / 0.01%)] [272,026 / 15 (100.00%)]
33.5C - 34.4C 33.5C - 34.4C = 1
[1 (0.00% / 0.00%)] [272,027 / 1 (100.00%)]

Missing observations (48 / 0.02%)

Sunshine Duration

0.0h 0.0h = 177,319
[177,319 (65.17% / 65.23%)] [177,319 / 271,823 (65.23%)]
0.1h 0.1h = 8,720
[8,720 (3.20% / 3.21%)] [186,039 / 94,504 (68.44%)]
0.2h 0.2h = 6,444
[6,444 (2.37% / 2.37%)] [192,483 / 85,784 (70.81%)]
0.3h 0.3h = 5,720
[5,720 (2.10% / 2.10%)] [198,203 / 79,340 (72.92%)]
0.4h 0.4h = 5,999
[5,999 (2.20% / 2.21%)] [204,202 / 73,620 (75.12%)]
0.5h 0.5h = 6,213
[6,213 (2.28% / 2.29%)] [210,415 / 67,621 (77.41%)]
0.6h 0.6h = 6,894
[6,894 (2.53% / 2.54%)] [217,309 / 61,408 (79.95%)]
0.7h 0.7h = 7,693
[7,693 (2.83% / 2.83%)] [225,002 / 54,514 (82.78%)]
0.8h 0.8h = 8,752
[8,752 (3.22% / 3.22%)] [233,754 / 46,821 (85.99%)]
0.9h 0.9h = 11,217
[11,217 (4.12% / 4.13%)] [244,971 / 38,069 (90.12%)]
1.0h 1.0h = 26,852
[26,852 (9.87% / 9.88%)] [271,823 / 26,852 (100.00%)]

Missing observations (252 / 0.09%)