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 382
Number of Observations 278,675
Period of Observations
Period Name Lat. Long. Height Anemometer
1986/03/18 -- 2017/12/99 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 = 264,727
[264,727 (94.99% / 95.01%)] [264,727 / 278,644 (95.01)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 7,153
[7,153 (2.57% / 2.57%)] [271,880 / 13,917 (97.57)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 2,262
[2,262 (0.81% / 0.81%)] [274,142 / 6,764 (98.38)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 1,267
[1,267 (0.45% / 0.45%)] [275,409 / 4,502 (98.84)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 782
[782 (0.28% / 0.28%)] [276,191 / 3,235 (99.12)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 554
[554 (0.20% / 0.20%)] [276,745 / 2,453 (99.32)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 388
[388 (0.14% / 0.14%)] [277,133 / 1,899 (99.46)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 285
[285 (0.10% / 0.10%)] [277,418 / 1,511 (99.56)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 221
[221 (0.08% / 0.08%)] [277,639 / 1,226 (99.64)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 163
[163 (0.06% / 0.06%)] [277,802 / 1,005 (99.70)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 142
[142 (0.05% / 0.05%)] [277,944 / 842 (99.75)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 127
[127 (0.05% / 0.05%)] [278,071 / 700 (99.79)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 88
[88 (0.03% / 0.03%)] [278,159 / 573 (99.83)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 70
[70 (0.03% / 0.03%)] [278,229 / 485 (99.85)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 55
[55 (0.02% / 0.02%)] [278,284 / 415 (99.87)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 45
[45 (0.02% / 0.02%)] [278,329 / 360 (99.89)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 36
[36 (0.01% / 0.01%)] [278,365 / 315 (99.90)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 33
[33 (0.01% / 0.01%)] [278,398 / 279 (99.91)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 25
[25 (0.01% / 0.01%)] [278,423 / 246 (99.92)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 23
[23 (0.01% / 0.01%)] [278,446 / 221 (99.93)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 14
[14 (0.01% / 0.01%)] [278,460 / 198 (99.93)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 17
[17 (0.01% / 0.01%)] [278,477 / 184 (99.94)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 27
[27 (0.01% / 0.01%)] [278,504 / 167 (99.95)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 16
[16 (0.01% / 0.01%)] [278,520 / 140 (99.96)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 18
[18 (0.01% / 0.01%)] [278,538 / 124 (99.96)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 14
[14 (0.01% / 0.01%)] [278,552 / 106 (99.97)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 13
[13 (0.00% / 0.00%)] [278,565 / 92 (99.97)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 6
[6 (0.00% / 0.00%)] [278,571 / 79 (99.97)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 4
[4 (0.00% / 0.00%)] [278,575 / 73 (99.98)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 8
[8 (0.00% / 0.00%)] [278,583 / 69 (99.98)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 7
[7 (0.00% / 0.00%)] [278,590 / 61 (99.98)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 5
[5 (0.00% / 0.00%)] [278,595 / 54 (99.98)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 3
[3 (0.00% / 0.00%)] [278,598 / 49 (99.98)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 5
[5 (0.00% / 0.00%)] [278,603 / 46 (99.99)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 2
[2 (0.00% / 0.00%)] [278,605 / 41 (99.99)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 3
[3 (0.00% / 0.00%)] [278,608 / 39 (99.99)]
35.5mm - 36.4mm 35.5mm - 36.4mm = 3
[3 (0.00% / 0.00%)] [278,611 / 36 (99.99)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 3
[3 (0.00% / 0.00%)] [278,614 / 33 (99.99)]
37.5mm - 38.4mm 37.5mm - 38.4mm = 2
[2 (0.00% / 0.00%)] [278,616 / 30 (99.99)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 7
[7 (0.00% / 0.00%)] [278,623 / 28 (99.99)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 3
[3 (0.00% / 0.00%)] [278,626 / 21 (99.99)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 1
[1 (0.00% / 0.00%)] [278,627 / 18 (99.99)]
41.5mm - 42.4mm 41.5mm - 42.4mm = 5
[5 (0.00% / 0.00%)] [278,632 / 17 (100.00)]
42.5mm - 43.4mm 42.5mm - 43.4mm = 1
[1 (0.00% / 0.00%)] [278,633 / 12 (100.00)]
45.5mm - 46.4mm 45.5mm - 46.4mm = 2
[2 (0.00% / 0.00%)] [278,635 / 11 (100.00)]
46.5mm - 47.4mm 46.5mm - 47.4mm = 1
[1 (0.00% / 0.00%)] [278,636 / 9 (100.00)]
48.5mm - 49.4mm 48.5mm - 49.4mm = 2
[2 (0.00% / 0.00%)] [278,638 / 8 (100.00)]
49.5mm - 50.4mm 49.5mm - 50.4mm = 2
[2 (0.00% / 0.00%)] [278,640 / 6 (100.00)]
51.5mm - 52.4mm 51.5mm - 52.4mm = 1
[1 (0.00% / 0.00%)] [278,641 / 4 (100.00)]
55.5mm - 56.4mm 55.5mm - 56.4mm = 1
[1 (0.00% / 0.00%)] [278,642 / 3 (100.00)]
70.5mm - 71.4mm 70.5mm - 71.4mm = 1
[1 (0.00% / 0.00%)] [278,643 / 2 (100.00)]
78.5mm - 79.4mm 78.5mm - 79.4mm = 1
[1 (0.00% / 0.00%)] [278,644 / 1 (100.00)]

Missing observations (31 / 0.01%)

Wind Direction

Calm Calm = 5,033
[5,033 (1.81% / 1.81%)]
NNE NNE = 21,189
[21,189 (7.60% / 7.60%)]
NE NE = 23,428
[23,428 (8.41% / 8.41%)]
ENE ENE = 32,364
[32,364 (11.61% / 11.62%)]
E E = 17,834
[17,834 (6.40% / 6.40%)]
ESE ESE = 18,509
[18,509 (6.64% / 6.64%)]
SE SE = 20,125
[20,125 (7.22% / 7.22%)]
SSE SSE = 18,000
[18,000 (6.46% / 6.46%)]
S S = 33,425
[33,425 (11.99% / 12.00%)]
SSW SSW = 16,089
[16,089 (5.77% / 5.77%)]
SW SW = 8,842
[8,842 (3.17% / 3.17%)]
WSW WSW = 2,905
[2,905 (1.04% / 1.04%)]
W W = 2,746
[2,746 (0.99% / 0.99%)]
WNW WNW = 5,970
[5,970 (2.14% / 2.14%)]
NW NW = 20,014
[20,014 (7.18% / 7.18%)]
NNW NNW = 14,807
[14,807 (5.31% / 5.31%)]
N N = 17,356
[17,356 (6.23% / 6.23%)]

Missing observations (39 / 0.01%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 5,699
[5,699 (2.05% / 2.05%)] [5,699 / 278,644 (2.05)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 42,774
[42,774 (15.35% / 15.35%)] [48,473 / 272,945 (17.40)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 58,449
[58,449 (20.97% / 20.98%)] [106,922 / 230,171 (38.37)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 61,702
[61,702 (22.14% / 22.14%)] [168,624 / 171,722 (60.52)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 47,628
[47,628 (17.09% / 17.09%)] [216,252 / 110,020 (77.61)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 28,259
[28,259 (10.14% / 10.14%)] [244,511 / 62,392 (87.75)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 15,827
[15,827 (5.68% / 5.68%)] [260,338 / 34,133 (93.43)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 8,766
[8,766 (3.15% / 3.15%)] [269,104 / 18,306 (96.58)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 4,497
[4,497 (1.61% / 1.61%)] [273,601 / 9,540 (98.19)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,273
[2,273 (0.82% / 0.82%)] [275,874 / 5,043 (99.01)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,228
[1,228 (0.44% / 0.44%)] [277,102 / 2,770 (99.45)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 649
[649 (0.23% / 0.23%)] [277,751 / 1,542 (99.68)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 343
[343 (0.12% / 0.12%)] [278,094 / 893 (99.80)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 205
[205 (0.07% / 0.07%)] [278,299 / 550 (99.88)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 107
[107 (0.04% / 0.04%)] [278,406 / 345 (99.91)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 60
[60 (0.02% / 0.02%)] [278,466 / 238 (99.94)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 46
[46 (0.02% / 0.02%)] [278,512 / 178 (99.95)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 29
[29 (0.01% / 0.01%)] [278,541 / 132 (99.96)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 22
[22 (0.01% / 0.01%)] [278,563 / 103 (99.97)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 19
[19 (0.01% / 0.01%)] [278,582 / 81 (99.98)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 19
[19 (0.01% / 0.01%)] [278,601 / 62 (99.98)]
20.5m/s - 21.4m/s 20.5m/s - 21.4m/s = 11
[11 (0.00% / 0.00%)] [278,612 / 43 (99.99)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 4
[4 (0.00% / 0.00%)] [278,616 / 32 (99.99)]
22.5m/s - 23.4m/s 22.5m/s - 23.4m/s = 6
[6 (0.00% / 0.00%)] [278,622 / 28 (99.99)]
23.5m/s - 24.4m/s 23.5m/s - 24.4m/s = 5
[5 (0.00% / 0.00%)] [278,627 / 22 (99.99)]
24.5m/s - 25.4m/s 24.5m/s - 25.4m/s = 5
[5 (0.00% / 0.00%)] [278,632 / 17 (100.00)]
25.5m/s - 26.4m/s 25.5m/s - 26.4m/s = 3
[3 (0.00% / 0.00%)] [278,635 / 12 (100.00)]
26.5m/s - 27.4m/s 26.5m/s - 27.4m/s = 2
[2 (0.00% / 0.00%)] [278,637 / 9 (100.00)]
27.5m/s - 28.4m/s 27.5m/s - 28.4m/s = 3
[3 (0.00% / 0.00%)] [278,640 / 7 (100.00)]
28.5m/s - 29.4m/s 28.5m/s - 29.4m/s = 4
[4 (0.00% / 0.00%)] [278,644 / 4 (100.00)]

Missing observations (31 / 0.01%)

Temperature

9.5C - 10.4C 9.5C - 10.4C = 6
[6 (0.00% / 0.00%)] [6 / 278,627 (0.00)]
10.5C - 11.4C 10.5C - 11.4C = 55
[55 (0.02% / 0.02%)] [61 / 278,621 (0.02)]
11.5C - 12.4C 11.5C - 12.4C = 293
[293 (0.11% / 0.11%)] [354 / 278,566 (0.13)]
12.5C - 13.4C 12.5C - 13.4C = 790
[790 (0.28% / 0.28%)] [1,144 / 278,273 (0.41)]
13.5C - 14.4C 13.5C - 14.4C = 1,773
[1,773 (0.64% / 0.64%)] [2,917 / 277,483 (1.05)]
14.5C - 15.4C 14.5C - 15.4C = 3,928
[3,928 (1.41% / 1.41%)] [6,845 / 275,710 (2.46)]
15.5C - 16.4C 15.5C - 16.4C = 7,125
[7,125 (2.56% / 2.56%)] [13,970 / 271,782 (5.01)]
16.5C - 17.4C 16.5C - 17.4C = 10,766
[10,766 (3.86% / 3.86%)] [24,736 / 264,657 (8.88)]
17.5C - 18.4C 17.5C - 18.4C = 15,101
[15,101 (5.42% / 5.42%)] [39,837 / 253,891 (14.30)]
18.5C - 19.4C 18.5C - 19.4C = 17,928
[17,928 (6.43% / 6.43%)] [57,765 / 238,790 (20.73)]
19.5C - 20.4C 19.5C - 20.4C = 19,859
[19,859 (7.13% / 7.13%)] [77,624 / 220,862 (27.86)]
20.5C - 21.4C 20.5C - 21.4C = 19,845
[19,845 (7.12% / 7.12%)] [97,469 / 201,003 (34.98)]
21.5C - 22.4C 21.5C - 22.4C = 19,144
[19,144 (6.87% / 6.87%)] [116,613 / 181,158 (41.85)]
22.5C - 23.4C 22.5C - 23.4C = 17,698
[17,698 (6.35% / 6.35%)] [134,311 / 162,014 (48.20)]
23.5C - 24.4C 23.5C - 24.4C = 18,238
[18,238 (6.54% / 6.55%)] [152,549 / 144,316 (54.75)]
24.5C - 25.4C 24.5C - 25.4C = 20,357
[20,357 (7.30% / 7.31%)] [172,906 / 126,078 (62.06)]
25.5C - 26.4C 25.5C - 26.4C = 24,167
[24,167 (8.67% / 8.67%)] [197,073 / 105,721 (70.73)]
26.5C - 27.4C 26.5C - 27.4C = 28,802
[28,802 (10.34% / 10.34%)] [225,875 / 81,554 (81.07)]
27.5C - 28.4C 27.5C - 28.4C = 28,195
[28,195 (10.12% / 10.12%)] [254,070 / 52,752 (91.19)]
28.5C - 29.4C 28.5C - 29.4C = 16,057
[16,057 (5.76% / 5.76%)] [270,127 / 24,557 (96.95)]
29.5C - 30.4C 29.5C - 30.4C = 6,594
[6,594 (2.37% / 2.37%)] [276,721 / 8,500 (99.32)]
30.5C - 31.4C 30.5C - 31.4C = 1,685
[1,685 (0.60% / 0.60%)] [278,406 / 1,906 (99.92)]
31.5C - 32.4C 31.5C - 32.4C = 202
[202 (0.07% / 0.07%)] [278,608 / 221 (99.99)]
32.5C - 33.4C 32.5C - 33.4C = 18
[18 (0.01% / 0.01%)] [278,626 / 19 (100.00)]
33.5C - 34.4C 33.5C - 34.4C = 1
[1 (0.00% / 0.00%)] [278,627 / 1 (100.00)]

Missing observations (48 / 0.02%)

Sunshine Duration

0.0h 0.0h = 181,682
[181,682 (65.19% / 65.25%)] [181,682 / 278,423 (65.25)]
0.1h 0.1h = 8,923
[8,923 (3.20% / 3.20%)] [190,605 / 96,741 (68.46)]
0.2h 0.2h = 6,605
[6,605 (2.37% / 2.37%)] [197,210 / 87,818 (70.83)]
0.3h 0.3h = 5,855
[5,855 (2.10% / 2.10%)] [203,065 / 81,213 (72.93)]
0.4h 0.4h = 6,142
[6,142 (2.20% / 2.21%)] [209,207 / 75,358 (75.14)]
0.5h 0.5h = 6,346
[6,346 (2.28% / 2.28%)] [215,553 / 69,216 (77.42)]
0.6h 0.6h = 7,032
[7,032 (2.52% / 2.53%)] [222,585 / 62,870 (79.94)]
0.7h 0.7h = 7,864
[7,864 (2.82% / 2.82%)] [230,449 / 55,838 (82.77)]
0.8h 0.8h = 8,936
[8,936 (3.21% / 3.21%)] [239,385 / 47,974 (85.98)]
0.9h 0.9h = 11,470
[11,470 (4.12% / 4.12%)] [250,855 / 39,038 (90.10)]
1.0h 1.0h = 27,568
[27,568 (9.89% / 9.90%)] [278,423 / 27,568 (100.00)]

Missing observations (252 / 0.09%)