Station Number 40426
Prefecture Ibaraki [ Local Portal ]
Location 茨城県龍ケ崎市大徳町 (RYUGASAKI SHI, IBARAKI KEN)
Months of Observations 491
Number of Observations 358,283
Period of Observations
Period Name Lat. Long. Height Anemometer
1975/05/20 -- 1978/12/18 RYUGASAKI 35.890N 140.212E 4m 0.0m
1978/12/19 -- 1988/07/10 RYUGASAKI 35.890N 140.212E 4m 6.6m
1988/07/11 -- 2007/01/22 RYUGASAKI 35.890N 140.212E 4m 6.6m
2007/01/23 -- 2008/03/17 RYUGASAKI 35.890N 140.212E 4m 9.4m
2008/03/18 -- 2017/03/99 RYUGASAKI 35.890N 140.212E 4m 9.4m
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
45061 ABIKO (Chiba) 9.69km 252deg.
40391 EDOSAKI (Ibaraki) 12.46km 51deg.
45056 ABIKO (Chiba) 16.95km 265deg.
45116 SAKURA (Chiba) 17.97km 180deg.
40336 TSUKUBA (Ibaraki) 20.12km 337deg.
40905 (Ibaraki) 20.12km 337deg.
45121 NARITA (Chiba) 21.05km 131deg.
40341 TSUCHIURA (Ibaraki) 23.65km 1deg.
45106 FUNABASHI (Chiba) 24.97km 217deg.
45036 SAWARA (Chiba) 25.37km 84deg.
45081 KATORI (Chiba) 26.43km 97deg.
45101 FUNABASHI (Chiba) 26.59km 228deg.

Statistics for the Whole Period

Precipitation

0.0mm - 0.4mm 0.0mm - 0.4mm = 332,898
[332,898 (92.91% / 93.53%)] [332,898 / 355,925 (93.53%)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 12,529
[12,529 (3.50% / 3.52%)] [345,427 / 23,027 (97.05%)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 4,503
[4,503 (1.26% / 1.27%)] [349,930 / 10,498 (98.32%)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 2,164
[2,164 (0.60% / 0.61%)] [352,094 / 5,995 (98.92%)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 1,196
[1,196 (0.33% / 0.34%)] [353,290 / 3,831 (99.26%)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 708
[708 (0.20% / 0.20%)] [353,998 / 2,635 (99.46%)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 493
[493 (0.14% / 0.14%)] [354,491 / 1,927 (99.60%)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 342
[342 (0.10% / 0.10%)] [354,833 / 1,434 (99.69%)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 237
[237 (0.07% / 0.07%)] [355,070 / 1,092 (99.76%)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 168
[168 (0.05% / 0.05%)] [355,238 / 855 (99.81%)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 142
[142 (0.04% / 0.04%)] [355,380 / 687 (99.85%)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 96
[96 (0.03% / 0.03%)] [355,476 / 545 (99.87%)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 79
[79 (0.02% / 0.02%)] [355,555 / 449 (99.90%)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 59
[59 (0.02% / 0.02%)] [355,614 / 370 (99.91%)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 53
[53 (0.01% / 0.01%)] [355,667 / 311 (99.93%)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 43
[43 (0.01% / 0.01%)] [355,710 / 258 (99.94%)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 38
[38 (0.01% / 0.01%)] [355,748 / 215 (99.95%)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 18
[18 (0.01% / 0.01%)] [355,766 / 177 (99.96%)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 24
[24 (0.01% / 0.01%)] [355,790 / 159 (99.96%)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 17
[17 (0.00% / 0.00%)] [355,807 / 135 (99.97%)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 12
[12 (0.00% / 0.00%)] [355,819 / 118 (99.97%)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 9
[9 (0.00% / 0.00%)] [355,828 / 106 (99.97%)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 13
[13 (0.00% / 0.00%)] [355,841 / 97 (99.98%)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 12
[12 (0.00% / 0.00%)] [355,853 / 84 (99.98%)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 8
[8 (0.00% / 0.00%)] [355,861 / 72 (99.98%)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 11
[11 (0.00% / 0.00%)] [355,872 / 64 (99.99%)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 9
[9 (0.00% / 0.00%)] [355,881 / 53 (99.99%)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 5
[5 (0.00% / 0.00%)] [355,886 / 44 (99.99%)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 5
[5 (0.00% / 0.00%)] [355,891 / 39 (99.99%)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 5
[5 (0.00% / 0.00%)] [355,896 / 34 (99.99%)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 4
[4 (0.00% / 0.00%)] [355,900 / 29 (99.99%)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 5
[5 (0.00% / 0.00%)] [355,905 / 25 (99.99%)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 1
[1 (0.00% / 0.00%)] [355,906 / 20 (99.99%)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 2
[2 (0.00% / 0.00%)] [355,908 / 19 (100.00%)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 3
[3 (0.00% / 0.00%)] [355,911 / 17 (100.00%)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 2
[2 (0.00% / 0.00%)] [355,913 / 14 (100.00%)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 2
[2 (0.00% / 0.00%)] [355,915 / 12 (100.00%)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 1
[1 (0.00% / 0.00%)] [355,916 / 10 (100.00%)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 1
[1 (0.00% / 0.00%)] [355,917 / 9 (100.00%)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 2
[2 (0.00% / 0.00%)] [355,919 / 8 (100.00%)]
44.5mm - 45.4mm 44.5mm - 45.4mm = 1
[1 (0.00% / 0.00%)] [355,920 / 6 (100.00%)]
46.5mm - 47.4mm 46.5mm - 47.4mm = 1
[1 (0.00% / 0.00%)] [355,921 / 5 (100.00%)]
50.5mm - 51.4mm 50.5mm - 51.4mm = 1
[1 (0.00% / 0.00%)] [355,922 / 4 (100.00%)]
53.5mm - 54.4mm 53.5mm - 54.4mm = 1
[1 (0.00% / 0.00%)] [355,923 / 3 (100.00%)]
54.5mm - 55.4mm 54.5mm - 55.4mm = 1
[1 (0.00% / 0.00%)] [355,924 / 2 (100.00%)]
84.5mm - 85.4mm 84.5mm - 85.4mm = 1
[1 (0.00% / 0.00%)] [355,925 / 1 (100.00%)]

Missing observations (2,358 / 0.66%)

Wind Direction

Calm Calm = 31,938
[31,938 (8.91% / 9.60%)] [0 / 0 (NA)]
NNE NNE = 26,550
[26,550 (7.41% / 7.98%)] [0 / 0 (NA)]
NE NE = 38,843
[38,843 (10.84% / 11.67%)] [0 / 0 (NA)]
ENE ENE = 33,022
[33,022 (9.22% / 9.92%)] [0 / 0 (NA)]
E E = 18,477
[18,477 (5.16% / 5.55%)] [0 / 0 (NA)]
ESE ESE = 9,155
[9,155 (2.56% / 2.75%)] [0 / 0 (NA)]
SE SE = 10,198
[10,198 (2.85% / 3.06%)] [0 / 0 (NA)]
SSE SSE = 15,163
[15,163 (4.23% / 4.56%)] [0 / 0 (NA)]
S S = 12,701
[12,701 (3.54% / 3.82%)] [0 / 0 (NA)]
SSW SSW = 21,956
[21,956 (6.13% / 6.60%)] [0 / 0 (NA)]
SW SW = 14,200
[14,200 (3.96% / 4.27%)] [0 / 0 (NA)]
WSW WSW = 8,944
[8,944 (2.50% / 2.69%)] [0 / 0 (NA)]
W W = 17,046
[17,046 (4.76% / 5.12%)] [0 / 0 (NA)]
WNW WNW = 24,304
[24,304 (6.78% / 7.30%)] [0 / 0 (NA)]
NW NW = 17,938
[17,938 (5.01% / 5.39%)] [0 / 0 (NA)]
NNW NNW = 14,483
[14,483 (4.04% / 4.35%)] [0 / 0 (NA)]
N N = 17,873
[17,873 (4.99% / 5.37%)] [0 / 0 (NA)]

Missing observations (25,492 / 7.12%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 33,125
[33,125 (9.25% / 9.95%)] [33,125 / 332,858 (9.95%)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 76,559
[76,559 (21.37% / 23.00%)] [109,684 / 299,733 (32.95%)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 82,091
[82,091 (22.91% / 24.66%)] [191,775 / 223,174 (57.61%)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 54,717
[54,717 (15.27% / 16.44%)] [246,492 / 141,083 (74.05%)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 36,283
[36,283 (10.13% / 10.90%)] [282,775 / 86,366 (84.95%)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 22,410
[22,410 (6.25% / 6.73%)] [305,185 / 50,083 (91.69%)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 12,800
[12,800 (3.57% / 3.85%)] [317,985 / 27,673 (95.53%)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 6,784
[6,784 (1.89% / 2.04%)] [324,769 / 14,873 (97.57%)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 3,715
[3,715 (1.04% / 1.12%)] [328,484 / 8,089 (98.69%)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,087
[2,087 (0.58% / 0.63%)] [330,571 / 4,374 (99.31%)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,153
[1,153 (0.32% / 0.35%)] [331,724 / 2,287 (99.66%)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 612
[612 (0.17% / 0.18%)] [332,336 / 1,134 (99.84%)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 268
[268 (0.07% / 0.08%)] [332,604 / 522 (99.92%)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 140
[140 (0.04% / 0.04%)] [332,744 / 254 (99.97%)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 70
[70 (0.02% / 0.02%)] [332,814 / 114 (99.99%)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 24
[24 (0.01% / 0.01%)] [332,838 / 44 (99.99%)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 9
[9 (0.00% / 0.00%)] [332,847 / 20 (100.00%)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 5
[5 (0.00% / 0.00%)] [332,852 / 11 (100.00%)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 2
[2 (0.00% / 0.00%)] [332,854 / 6 (100.00%)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 2
[2 (0.00% / 0.00%)] [332,856 / 4 (100.00%)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 1
[1 (0.00% / 0.00%)] [332,857 / 2 (100.00%)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 1
[1 (0.00% / 0.00%)] [332,858 / 1 (100.00%)]

Missing observations (25,425 / 7.10%)

Temperature

-15.5C - -14.6C -15.5C - -14.6C = 1
[1 (0.00% / 0.00%)] [1 / 333,131 (0.00%)]
-13.5C - -12.6C -13.5C - -12.6C = 1
[1 (0.00% / 0.00%)] [2 / 333,130 (0.00%)]
-12.5C - -11.6C -12.5C - -11.6C = 3
[3 (0.00% / 0.00%)] [5 / 333,129 (0.00%)]
-11.5C - -10.6C -11.5C - -10.6C = 1
[1 (0.00% / 0.00%)] [6 / 333,126 (0.00%)]
-10.5C - -9.6C -10.5C - -9.6C = 2
[2 (0.00% / 0.00%)] [8 / 333,125 (0.00%)]
-9.5C - -8.6C -9.5C - -8.6C = 4
[4 (0.00% / 0.00%)] [12 / 333,123 (0.00%)]
-8.5C - -7.6C -8.5C - -7.6C = 11
[11 (0.00% / 0.00%)] [23 / 333,119 (0.01%)]
-7.5C - -6.6C -7.5C - -6.6C = 45
[45 (0.01% / 0.01%)] [68 / 333,108 (0.02%)]
-6.5C - -5.6C -6.5C - -5.6C = 164
[164 (0.05% / 0.05%)] [232 / 333,063 (0.07%)]
-5.5C - -4.6C -5.5C - -4.6C = 411
[411 (0.11% / 0.12%)] [643 / 332,899 (0.19%)]
-4.5C - -3.6C -4.5C - -3.6C = 920
[920 (0.26% / 0.28%)] [1,563 / 332,488 (0.47%)]
-3.5C - -2.6C -3.5C - -2.6C = 1,682
[1,682 (0.47% / 0.50%)] [3,245 / 331,568 (0.97%)]
-2.5C - -1.6C -2.5C - -1.6C = 2,746
[2,746 (0.77% / 0.82%)] [5,991 / 329,886 (1.80%)]
-1.5C - -0.6C -1.5C - -0.6C = 3,974
[3,974 (1.11% / 1.19%)] [9,965 / 327,140 (2.99%)]
-0.5C - 0.4C -0.5C - 0.4C = 11,616
[11,616 (3.24% / 3.49%)] [21,581 / 323,166 (6.48%)]
0.5C - 1.4C 0.5C - 1.4C = 8,125
[8,125 (2.27% / 2.44%)] [29,706 / 311,550 (8.92%)]
1.5C - 2.4C 1.5C - 2.4C = 8,521
[8,521 (2.38% / 2.56%)] [38,227 / 303,425 (11.48%)]
2.5C - 3.4C 2.5C - 3.4C = 9,477
[9,477 (2.65% / 2.84%)] [47,704 / 294,904 (14.32%)]
3.5C - 4.4C 3.5C - 4.4C = 9,788
[9,788 (2.73% / 2.94%)] [57,492 / 285,427 (17.26%)]
4.5C - 5.4C 4.5C - 5.4C = 10,761
[10,761 (3.00% / 3.23%)] [68,253 / 275,639 (20.49%)]
5.5C - 6.4C 5.5C - 6.4C = 11,002
[11,002 (3.07% / 3.30%)] [79,255 / 264,878 (23.79%)]
6.5C - 7.4C 6.5C - 7.4C = 11,191
[11,191 (3.12% / 3.36%)] [90,446 / 253,876 (27.15%)]
7.5C - 8.4C 7.5C - 8.4C = 11,091
[11,091 (3.10% / 3.33%)] [101,537 / 242,685 (30.48%)]
8.5C - 9.4C 8.5C - 9.4C = 10,711
[10,711 (2.99% / 3.22%)] [112,248 / 231,594 (33.69%)]
9.5C - 10.4C 9.5C - 10.4C = 10,433
[10,433 (2.91% / 3.13%)] [122,681 / 220,883 (36.83%)]
10.5C - 11.4C 10.5C - 11.4C = 10,217
[10,217 (2.85% / 3.07%)] [132,898 / 210,450 (39.89%)]
11.5C - 12.4C 11.5C - 12.4C = 10,118
[10,118 (2.82% / 3.04%)] [143,016 / 200,233 (42.93%)]
12.5C - 13.4C 12.5C - 13.4C = 10,163
[10,163 (2.84% / 3.05%)] [153,179 / 190,115 (45.98%)]
13.5C - 14.4C 13.5C - 14.4C = 10,415
[10,415 (2.91% / 3.13%)] [163,594 / 179,952 (49.11%)]
14.5C - 15.4C 14.5C - 15.4C = 10,840
[10,840 (3.03% / 3.25%)] [174,434 / 169,537 (52.36%)]
15.5C - 16.4C 15.5C - 16.4C = 11,614
[11,614 (3.24% / 3.49%)] [186,048 / 158,697 (55.85%)]
16.5C - 17.4C 16.5C - 17.4C = 12,540
[12,540 (3.50% / 3.76%)] [198,588 / 147,083 (59.61%)]
17.5C - 18.4C 17.5C - 18.4C = 13,246
[13,246 (3.70% / 3.98%)] [211,834 / 134,543 (63.59%)]
18.5C - 19.4C 18.5C - 19.4C = 13,640
[13,640 (3.81% / 4.09%)] [225,474 / 121,297 (67.68%)]
19.5C - 20.4C 19.5C - 20.4C = 13,667
[13,667 (3.81% / 4.10%)] [239,141 / 107,657 (71.79%)]
20.5C - 21.4C 20.5C - 21.4C = 13,057
[13,057 (3.64% / 3.92%)] [252,198 / 93,990 (75.71%)]
21.5C - 22.4C 21.5C - 22.4C = 12,825
[12,825 (3.58% / 3.85%)] [265,023 / 80,933 (79.56%)]
22.5C - 23.4C 22.5C - 23.4C = 12,636
[12,636 (3.53% / 3.79%)] [277,659 / 68,108 (83.35%)]
23.5C - 24.4C 23.5C - 24.4C = 12,519
[12,519 (3.49% / 3.76%)] [290,178 / 55,472 (87.11%)]
24.5C - 25.4C 24.5C - 25.4C = 10,653
[10,653 (2.97% / 3.20%)] [300,831 / 42,953 (90.30%)]
25.5C - 26.4C 25.5C - 26.4C = 8,271
[8,271 (2.31% / 2.48%)] [309,102 / 32,300 (92.79%)]
26.5C - 27.4C 26.5C - 27.4C = 6,003
[6,003 (1.68% / 1.80%)] [315,105 / 24,029 (94.59%)]
27.5C - 28.4C 27.5C - 28.4C = 4,564
[4,564 (1.27% / 1.37%)] [319,669 / 18,026 (95.96%)]
28.5C - 29.4C 28.5C - 29.4C = 3,877
[3,877 (1.08% / 1.16%)] [323,546 / 13,462 (97.12%)]
29.5C - 30.4C 29.5C - 30.4C = 3,047
[3,047 (0.85% / 0.91%)] [326,593 / 9,585 (98.04%)]
30.5C - 31.4C 30.5C - 31.4C = 2,530
[2,530 (0.71% / 0.76%)] [329,123 / 6,538 (98.80%)]
31.5C - 32.4C 31.5C - 32.4C = 1,914
[1,914 (0.53% / 0.57%)] [331,037 / 4,008 (99.37%)]
32.5C - 33.4C 32.5C - 33.4C = 1,213
[1,213 (0.34% / 0.36%)] [332,250 / 2,094 (99.74%)]
33.5C - 34.4C 33.5C - 34.4C = 573
[573 (0.16% / 0.17%)] [332,823 / 881 (99.91%)]
34.5C - 35.4C 34.5C - 35.4C = 231
[231 (0.06% / 0.07%)] [333,054 / 308 (99.98%)]
35.5C - 36.4C 35.5C - 36.4C = 62
[62 (0.02% / 0.02%)] [333,116 / 77 (100.00%)]
36.5C - 37.4C 36.5C - 37.4C = 11
[11 (0.00% / 0.00%)] [333,127 / 15 (100.00%)]
37.5C - 38.4C 37.5C - 38.4C = 4
[4 (0.00% / 0.00%)] [333,131 / 4 (100.00%)]

Missing observations (25,152 / 7.02%)

Sunshine Duration

0.0h 0.0h = 234,292
[234,292 (65.39% / 70.35%)] [234,292 / 333,035 (70.35%)]
0.1h 0.1h = 6,943
[6,943 (1.94% / 2.08%)] [241,235 / 98,743 (72.44%)]
0.2h 0.2h = 5,390
[5,390 (1.50% / 1.62%)] [246,625 / 91,800 (74.05%)]
0.3h 0.3h = 4,679
[4,679 (1.31% / 1.40%)] [251,304 / 86,410 (75.46%)]
0.4h 0.4h = 4,362
[4,362 (1.22% / 1.31%)] [255,666 / 81,731 (76.77%)]
0.5h 0.5h = 4,440
[4,440 (1.24% / 1.33%)] [260,106 / 77,369 (78.10%)]
0.6h 0.6h = 4,425
[4,425 (1.24% / 1.33%)] [264,531 / 72,929 (79.43%)]
0.7h 0.7h = 4,661
[4,661 (1.30% / 1.40%)] [269,192 / 68,504 (80.83%)]
0.8h 0.8h = 5,308
[5,308 (1.48% / 1.59%)] [274,500 / 63,843 (82.42%)]
0.9h 0.9h = 7,203
[7,203 (2.01% / 2.16%)] [281,703 / 58,535 (84.59%)]
1.0h 1.0h = 51,332
[51,332 (14.33% / 15.41%)] [333,035 / 51,332 (100.00%)]

Missing observations (25,248 / 7.05%)