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 354
Number of Observations 258,203
Period of Observations
Period Name Lat. Long. Height Anemometer
1986/03/18 -- 2015/08/99 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 = 245,445
[245,445 (95.06% / 95.07%)] [245,445 / 258,172 (95.07%)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 6,495
[6,495 (2.52% / 2.52%)] [251,940 / 12,727 (97.59%)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 2,078
[2,078 (0.80% / 0.80%)] [254,018 / 6,232 (98.39%)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 1,177
[1,177 (0.46% / 0.46%)] [255,195 / 4,154 (98.85%)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 724
[724 (0.28% / 0.28%)] [255,919 / 2,977 (99.13%)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 508
[508 (0.20% / 0.20%)] [256,427 / 2,253 (99.32%)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 360
[360 (0.14% / 0.14%)] [256,787 / 1,745 (99.46%)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 267
[267 (0.10% / 0.10%)] [257,054 / 1,385 (99.57%)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 207
[207 (0.08% / 0.08%)] [257,261 / 1,118 (99.65%)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 147
[147 (0.06% / 0.06%)] [257,408 / 911 (99.70%)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 128
[128 (0.05% / 0.05%)] [257,536 / 764 (99.75%)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 115
[115 (0.04% / 0.04%)] [257,651 / 636 (99.80%)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 81
[81 (0.03% / 0.03%)] [257,732 / 521 (99.83%)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 66
[66 (0.03% / 0.03%)] [257,798 / 440 (99.86%)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 52
[52 (0.02% / 0.02%)] [257,850 / 374 (99.88%)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 41
[41 (0.02% / 0.02%)] [257,891 / 322 (99.89%)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 34
[34 (0.01% / 0.01%)] [257,925 / 281 (99.90%)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 27
[27 (0.01% / 0.01%)] [257,952 / 247 (99.91%)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 24
[24 (0.01% / 0.01%)] [257,976 / 220 (99.92%)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 21
[21 (0.01% / 0.01%)] [257,997 / 196 (99.93%)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 14
[14 (0.01% / 0.01%)] [258,011 / 175 (99.94%)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 14
[14 (0.01% / 0.01%)] [258,025 / 161 (99.94%)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 26
[26 (0.01% / 0.01%)] [258,051 / 147 (99.95%)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 15
[15 (0.01% / 0.01%)] [258,066 / 121 (99.96%)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 15
[15 (0.01% / 0.01%)] [258,081 / 106 (99.96%)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 13
[13 (0.01% / 0.01%)] [258,094 / 91 (99.97%)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 12
[12 (0.00% / 0.00%)] [258,106 / 78 (99.97%)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 5
[5 (0.00% / 0.00%)] [258,111 / 66 (99.98%)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 4
[4 (0.00% / 0.00%)] [258,115 / 61 (99.98%)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 5
[5 (0.00% / 0.00%)] [258,120 / 57 (99.98%)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 6
[6 (0.00% / 0.00%)] [258,126 / 52 (99.98%)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 3
[3 (0.00% / 0.00%)] [258,129 / 46 (99.98%)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 3
[3 (0.00% / 0.00%)] [258,132 / 43 (99.98%)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 3
[3 (0.00% / 0.00%)] [258,135 / 40 (99.99%)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 1
[1 (0.00% / 0.00%)] [258,136 / 37 (99.99%)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 3
[3 (0.00% / 0.00%)] [258,139 / 36 (99.99%)]
35.5mm - 36.4mm 35.5mm - 36.4mm = 3
[3 (0.00% / 0.00%)] [258,142 / 33 (99.99%)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 3
[3 (0.00% / 0.00%)] [258,145 / 30 (99.99%)]
37.5mm - 38.4mm 37.5mm - 38.4mm = 2
[2 (0.00% / 0.00%)] [258,147 / 27 (99.99%)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 6
[6 (0.00% / 0.00%)] [258,153 / 25 (99.99%)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 3
[3 (0.00% / 0.00%)] [258,156 / 19 (99.99%)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 1
[1 (0.00% / 0.00%)] [258,157 / 16 (99.99%)]
41.5mm - 42.4mm 41.5mm - 42.4mm = 5
[5 (0.00% / 0.00%)] [258,162 / 15 (100.00%)]
42.5mm - 43.4mm 42.5mm - 43.4mm = 1
[1 (0.00% / 0.00%)] [258,163 / 10 (100.00%)]
45.5mm - 46.4mm 45.5mm - 46.4mm = 2
[2 (0.00% / 0.00%)] [258,165 / 9 (100.00%)]
48.5mm - 49.4mm 48.5mm - 49.4mm = 2
[2 (0.00% / 0.00%)] [258,167 / 7 (100.00%)]
49.5mm - 50.4mm 49.5mm - 50.4mm = 2
[2 (0.00% / 0.00%)] [258,169 / 5 (100.00%)]
51.5mm - 52.4mm 51.5mm - 52.4mm = 1
[1 (0.00% / 0.00%)] [258,170 / 3 (100.00%)]
55.5mm - 56.4mm 55.5mm - 56.4mm = 1
[1 (0.00% / 0.00%)] [258,171 / 2 (100.00%)]
70.5mm - 71.4mm 70.5mm - 71.4mm = 1
[1 (0.00% / 0.00%)] [258,172 / 1 (100.00%)]

Missing observations (31 / 0.01%)

Wind Direction

Calm Calm = 5,006
[5,006 (1.94% / 1.94%)] [0 / 0 (NA)]
NNE NNE = 19,653
[19,653 (7.61% / 7.61%)] [0 / 0 (NA)]
NE NE = 21,524
[21,524 (8.34% / 8.34%)] [0 / 0 (NA)]
ENE ENE = 30,064
[30,064 (11.64% / 11.65%)] [0 / 0 (NA)]
E E = 16,629
[16,629 (6.44% / 6.44%)] [0 / 0 (NA)]
ESE ESE = 17,027
[17,027 (6.59% / 6.60%)] [0 / 0 (NA)]
SE SE = 18,930
[18,930 (7.33% / 7.33%)] [0 / 0 (NA)]
SSE SSE = 16,249
[16,249 (6.29% / 6.29%)] [0 / 0 (NA)]
S S = 30,825
[30,825 (11.94% / 11.94%)] [0 / 0 (NA)]
SSW SSW = 15,147
[15,147 (5.87% / 5.87%)] [0 / 0 (NA)]
SW SW = 8,429
[8,429 (3.26% / 3.26%)] [0 / 0 (NA)]
WSW WSW = 2,680
[2,680 (1.04% / 1.04%)] [0 / 0 (NA)]
W W = 2,569
[2,569 (0.99% / 1.00%)] [0 / 0 (NA)]
WNW WNW = 5,560
[5,560 (2.15% / 2.15%)] [0 / 0 (NA)]
NW NW = 18,507
[18,507 (7.17% / 7.17%)] [0 / 0 (NA)]
NNW NNW = 13,458
[13,458 (5.21% / 5.21%)] [0 / 0 (NA)]
N N = 15,907
[15,907 (6.16% / 6.16%)] [0 / 0 (NA)]

Missing observations (39 / 0.02%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 5,571
[5,571 (2.16% / 2.16%)] [5,571 / 258,172 (2.16%)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 39,596
[39,596 (15.34% / 15.34%)] [45,167 / 252,601 (17.49%)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 54,036
[54,036 (20.93% / 20.93%)] [99,203 / 213,005 (38.43%)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 57,151
[57,151 (22.13% / 22.14%)] [156,354 / 158,969 (60.56%)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 44,085
[44,085 (17.07% / 17.08%)] [200,439 / 101,818 (77.64%)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 26,191
[26,191 (10.14% / 10.14%)] [226,630 / 57,733 (87.78%)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 14,589
[14,589 (5.65% / 5.65%)] [241,219 / 31,542 (93.43%)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 8,092
[8,092 (3.13% / 3.13%)] [249,311 / 16,953 (96.57%)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 4,184
[4,184 (1.62% / 1.62%)] [253,495 / 8,861 (98.19%)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,144
[2,144 (0.83% / 0.83%)] [255,639 / 4,677 (99.02%)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,139
[1,139 (0.44% / 0.44%)] [256,778 / 2,533 (99.46%)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 587
[587 (0.23% / 0.23%)] [257,365 / 1,394 (99.69%)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 309
[309 (0.12% / 0.12%)] [257,674 / 807 (99.81%)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 183
[183 (0.07% / 0.07%)] [257,857 / 498 (99.88%)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 100
[100 (0.04% / 0.04%)] [257,957 / 315 (99.92%)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 56
[56 (0.02% / 0.02%)] [258,013 / 215 (99.94%)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 40
[40 (0.02% / 0.02%)] [258,053 / 159 (99.95%)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 27
[27 (0.01% / 0.01%)] [258,080 / 119 (99.96%)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 19
[19 (0.01% / 0.01%)] [258,099 / 92 (99.97%)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 15
[15 (0.01% / 0.01%)] [258,114 / 73 (99.98%)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 17
[17 (0.01% / 0.01%)] [258,131 / 58 (99.98%)]
20.5m/s - 21.4m/s 20.5m/s - 21.4m/s = 10
[10 (0.00% / 0.00%)] [258,141 / 41 (99.99%)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 4
[4 (0.00% / 0.00%)] [258,145 / 31 (99.99%)]
22.5m/s - 23.4m/s 22.5m/s - 23.4m/s = 6
[6 (0.00% / 0.00%)] [258,151 / 27 (99.99%)]
23.5m/s - 24.4m/s 23.5m/s - 24.4m/s = 5
[5 (0.00% / 0.00%)] [258,156 / 21 (99.99%)]
24.5m/s - 25.4m/s 24.5m/s - 25.4m/s = 5
[5 (0.00% / 0.00%)] [258,161 / 16 (100.00%)]
25.5m/s - 26.4m/s 25.5m/s - 26.4m/s = 2
[2 (0.00% / 0.00%)] [258,163 / 11 (100.00%)]
26.5m/s - 27.4m/s 26.5m/s - 27.4m/s = 2
[2 (0.00% / 0.00%)] [258,165 / 9 (100.00%)]
27.5m/s - 28.4m/s 27.5m/s - 28.4m/s = 3
[3 (0.00% / 0.00%)] [258,168 / 7 (100.00%)]
28.5m/s - 29.4m/s 28.5m/s - 29.4m/s = 4
[4 (0.00% / 0.00%)] [258,172 / 4 (100.00%)]

Missing observations (31 / 0.01%)

Temperature

9.5C - 10.4C 9.5C - 10.4C = 6
[6 (0.00% / 0.00%)] [6 / 258,155 (0.00%)]
10.5C - 11.4C 10.5C - 11.4C = 55
[55 (0.02% / 0.02%)] [61 / 258,149 (0.02%)]
11.5C - 12.4C 11.5C - 12.4C = 273
[273 (0.11% / 0.11%)] [334 / 258,094 (0.13%)]
12.5C - 13.4C 12.5C - 13.4C = 741
[741 (0.29% / 0.29%)] [1,075 / 257,821 (0.42%)]
13.5C - 14.4C 13.5C - 14.4C = 1,667
[1,667 (0.65% / 0.65%)] [2,742 / 257,080 (1.06%)]
14.5C - 15.4C 14.5C - 15.4C = 3,687
[3,687 (1.43% / 1.43%)] [6,429 / 255,413 (2.49%)]
15.5C - 16.4C 15.5C - 16.4C = 6,722
[6,722 (2.60% / 2.60%)] [13,151 / 251,726 (5.09%)]
16.5C - 17.4C 16.5C - 17.4C = 10,255
[10,255 (3.97% / 3.97%)] [23,406 / 245,004 (9.07%)]
17.5C - 18.4C 17.5C - 18.4C = 14,300
[14,300 (5.54% / 5.54%)] [37,706 / 234,749 (14.61%)]
18.5C - 19.4C 18.5C - 19.4C = 16,776
[16,776 (6.50% / 6.50%)] [54,482 / 220,449 (21.10%)]
19.5C - 20.4C 19.5C - 20.4C = 18,525
[18,525 (7.17% / 7.18%)] [73,007 / 203,673 (28.28%)]
20.5C - 21.4C 20.5C - 21.4C = 18,531
[18,531 (7.18% / 7.18%)] [91,538 / 185,148 (35.46%)]
21.5C - 22.4C 21.5C - 22.4C = 17,897
[17,897 (6.93% / 6.93%)] [109,435 / 166,617 (42.39%)]
22.5C - 23.4C 22.5C - 23.4C = 16,378
[16,378 (6.34% / 6.34%)] [125,813 / 148,720 (48.74%)]
23.5C - 24.4C 23.5C - 24.4C = 16,783
[16,783 (6.50% / 6.50%)] [142,596 / 132,342 (55.24%)]
24.5C - 25.4C 24.5C - 25.4C = 18,680
[18,680 (7.23% / 7.24%)] [161,276 / 115,559 (62.47%)]
25.5C - 26.4C 25.5C - 26.4C = 22,429
[22,429 (8.69% / 8.69%)] [183,705 / 96,879 (71.16%)]
26.5C - 27.4C 26.5C - 27.4C = 26,622
[26,622 (10.31% / 10.31%)] [210,327 / 74,450 (81.47%)]
27.5C - 28.4C 27.5C - 28.4C = 25,700
[25,700 (9.95% / 9.96%)] [236,027 / 47,828 (91.43%)]
28.5C - 29.4C 28.5C - 29.4C = 14,654
[14,654 (5.68% / 5.68%)] [250,681 / 22,128 (97.10%)]
29.5C - 30.4C 29.5C - 30.4C = 5,821
[5,821 (2.25% / 2.25%)] [256,502 / 7,474 (99.36%)]
30.5C - 31.4C 30.5C - 31.4C = 1,474
[1,474 (0.57% / 0.57%)] [257,976 / 1,653 (99.93%)]
31.5C - 32.4C 31.5C - 32.4C = 164
[164 (0.06% / 0.06%)] [258,140 / 179 (99.99%)]
32.5C - 33.4C 32.5C - 33.4C = 14
[14 (0.01% / 0.01%)] [258,154 / 15 (100.00%)]
33.5C - 34.4C 33.5C - 34.4C = 1
[1 (0.00% / 0.00%)] [258,155 / 1 (100.00%)]

Missing observations (48 / 0.02%)

Sunshine Duration

0.0h 0.0h = 168,337
[168,337 (65.20% / 65.26%)] [168,337 / 257,951 (65.26%)]
0.1h 0.1h = 8,248
[8,248 (3.19% / 3.20%)] [176,585 / 89,614 (68.46%)]
0.2h 0.2h = 6,092
[6,092 (2.36% / 2.36%)] [182,677 / 81,366 (70.82%)]
0.3h 0.3h = 5,406
[5,406 (2.09% / 2.10%)] [188,083 / 75,274 (72.91%)]
0.4h 0.4h = 5,648
[5,648 (2.19% / 2.19%)] [193,731 / 69,868 (75.10%)]
0.5h 0.5h = 5,892
[5,892 (2.28% / 2.28%)] [199,623 / 64,220 (77.39%)]
0.6h 0.6h = 6,533
[6,533 (2.53% / 2.53%)] [206,156 / 58,328 (79.92%)]
0.7h 0.7h = 7,300
[7,300 (2.83% / 2.83%)] [213,456 / 51,795 (82.75%)]
0.8h 0.8h = 8,292
[8,292 (3.21% / 3.21%)] [221,748 / 44,495 (85.97%)]
0.9h 0.9h = 10,661
[10,661 (4.13% / 4.13%)] [232,409 / 36,203 (90.10%)]
1.0h 1.0h = 25,542
[25,542 (9.89% / 9.90%)] [257,951 / 25,542 (100.00%)]

Missing observations (252 / 0.10%)