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 484
Number of Observations 353,195
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 -- 2016/08/99 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 = 328,130
[328,130 (92.90% / 93.53%)] [328,130 / 350,837 (93.53%)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 12,362
[12,362 (3.50% / 3.52%)] [340,492 / 22,707 (97.05%)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 4,431
[4,431 (1.25% / 1.26%)] [344,923 / 10,345 (98.31%)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 2,135
[2,135 (0.60% / 0.61%)] [347,058 / 5,914 (98.92%)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 1,177
[1,177 (0.33% / 0.34%)] [348,235 / 3,779 (99.26%)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 699
[699 (0.20% / 0.20%)] [348,934 / 2,602 (99.46%)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 486
[486 (0.14% / 0.14%)] [349,420 / 1,903 (99.60%)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 338
[338 (0.10% / 0.10%)] [349,758 / 1,417 (99.69%)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 234
[234 (0.07% / 0.07%)] [349,992 / 1,079 (99.76%)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 163
[163 (0.05% / 0.05%)] [350,155 / 845 (99.81%)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 142
[142 (0.04% / 0.04%)] [350,297 / 682 (99.85%)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 93
[93 (0.03% / 0.03%)] [350,390 / 540 (99.87%)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 79
[79 (0.02% / 0.02%)] [350,469 / 447 (99.90%)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 59
[59 (0.02% / 0.02%)] [350,528 / 368 (99.91%)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 53
[53 (0.02% / 0.02%)] [350,581 / 309 (99.93%)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 42
[42 (0.01% / 0.01%)] [350,623 / 256 (99.94%)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 38
[38 (0.01% / 0.01%)] [350,661 / 214 (99.95%)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 18
[18 (0.01% / 0.01%)] [350,679 / 176 (99.95%)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 24
[24 (0.01% / 0.01%)] [350,703 / 158 (99.96%)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 17
[17 (0.00% / 0.00%)] [350,720 / 134 (99.97%)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 11
[11 (0.00% / 0.00%)] [350,731 / 117 (99.97%)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 9
[9 (0.00% / 0.00%)] [350,740 / 106 (99.97%)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 13
[13 (0.00% / 0.00%)] [350,753 / 97 (99.98%)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 12
[12 (0.00% / 0.00%)] [350,765 / 84 (99.98%)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 8
[8 (0.00% / 0.00%)] [350,773 / 72 (99.98%)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 11
[11 (0.00% / 0.00%)] [350,784 / 64 (99.98%)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 9
[9 (0.00% / 0.00%)] [350,793 / 53 (99.99%)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 5
[5 (0.00% / 0.00%)] [350,798 / 44 (99.99%)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 5
[5 (0.00% / 0.00%)] [350,803 / 39 (99.99%)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 5
[5 (0.00% / 0.00%)] [350,808 / 34 (99.99%)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 4
[4 (0.00% / 0.00%)] [350,812 / 29 (99.99%)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 5
[5 (0.00% / 0.00%)] [350,817 / 25 (99.99%)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 1
[1 (0.00% / 0.00%)] [350,818 / 20 (99.99%)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 2
[2 (0.00% / 0.00%)] [350,820 / 19 (100.00%)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 3
[3 (0.00% / 0.00%)] [350,823 / 17 (100.00%)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 2
[2 (0.00% / 0.00%)] [350,825 / 14 (100.00%)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 2
[2 (0.00% / 0.00%)] [350,827 / 12 (100.00%)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 1
[1 (0.00% / 0.00%)] [350,828 / 10 (100.00%)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 1
[1 (0.00% / 0.00%)] [350,829 / 9 (100.00%)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 2
[2 (0.00% / 0.00%)] [350,831 / 8 (100.00%)]
44.5mm - 45.4mm 44.5mm - 45.4mm = 1
[1 (0.00% / 0.00%)] [350,832 / 6 (100.00%)]
46.5mm - 47.4mm 46.5mm - 47.4mm = 1
[1 (0.00% / 0.00%)] [350,833 / 5 (100.00%)]
50.5mm - 51.4mm 50.5mm - 51.4mm = 1
[1 (0.00% / 0.00%)] [350,834 / 4 (100.00%)]
53.5mm - 54.4mm 53.5mm - 54.4mm = 1
[1 (0.00% / 0.00%)] [350,835 / 3 (100.00%)]
54.5mm - 55.4mm 54.5mm - 55.4mm = 1
[1 (0.00% / 0.00%)] [350,836 / 2 (100.00%)]
84.5mm - 85.4mm 84.5mm - 85.4mm = 1
[1 (0.00% / 0.00%)] [350,837 / 1 (100.00%)]

Missing observations (2,358 / 0.67%)

Wind Direction

Calm Calm = 31,827
[31,827 (9.01% / 9.71%)] [0 / 0 (NA)]
NNE NNE = 26,099
[26,099 (7.39% / 7.96%)] [0 / 0 (NA)]
NE NE = 38,389
[38,389 (10.87% / 11.71%)] [0 / 0 (NA)]
ENE ENE = 32,675
[32,675 (9.25% / 9.97%)] [0 / 0 (NA)]
E E = 18,221
[18,221 (5.16% / 5.56%)] [0 / 0 (NA)]
ESE ESE = 9,035
[9,035 (2.56% / 2.76%)] [0 / 0 (NA)]
SE SE = 10,086
[10,086 (2.86% / 3.08%)] [0 / 0 (NA)]
SSE SSE = 15,045
[15,045 (4.26% / 4.59%)] [0 / 0 (NA)]
S S = 12,592
[12,592 (3.57% / 3.84%)] [0 / 0 (NA)]
SSW SSW = 21,768
[21,768 (6.16% / 6.64%)] [0 / 0 (NA)]
SW SW = 14,014
[14,014 (3.97% / 4.28%)] [0 / 0 (NA)]
WSW WSW = 8,686
[8,686 (2.46% / 2.65%)] [0 / 0 (NA)]
W W = 16,501
[16,501 (4.67% / 5.04%)] [0 / 0 (NA)]
WNW WNW = 23,570
[23,570 (6.67% / 7.19%)] [0 / 0 (NA)]
NW NW = 17,490
[17,490 (4.95% / 5.34%)] [0 / 0 (NA)]
NNW NNW = 14,200
[14,200 (4.02% / 4.33%)] [0 / 0 (NA)]
N N = 17,508
[17,508 (4.96% / 5.34%)] [0 / 0 (NA)]

Missing observations (25,489 / 7.22%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 32,898
[32,898 (9.31% / 10.04%)] [32,898 / 327,773 (10.04%)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 75,310
[75,310 (21.32% / 22.98%)] [108,208 / 294,875 (33.01%)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 80,501
[80,501 (22.79% / 24.56%)] [188,709 / 219,565 (57.57%)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 53,876
[53,876 (15.25% / 16.44%)] [242,585 / 139,064 (74.01%)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 35,811
[35,811 (10.14% / 10.93%)] [278,396 / 85,188 (84.94%)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 22,098
[22,098 (6.26% / 6.74%)] [300,494 / 49,377 (91.68%)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 12,618
[12,618 (3.57% / 3.85%)] [313,112 / 27,279 (95.53%)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 6,689
[6,689 (1.89% / 2.04%)] [319,801 / 14,661 (97.57%)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 3,667
[3,667 (1.04% / 1.12%)] [323,468 / 7,972 (98.69%)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,055
[2,055 (0.58% / 0.63%)] [325,523 / 4,305 (99.31%)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,135
[1,135 (0.32% / 0.35%)] [326,658 / 2,250 (99.66%)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 598
[598 (0.17% / 0.18%)] [327,256 / 1,115 (99.84%)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 264
[264 (0.07% / 0.08%)] [327,520 / 517 (99.92%)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 139
[139 (0.04% / 0.04%)] [327,659 / 253 (99.97%)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 70
[70 (0.02% / 0.02%)] [327,729 / 114 (99.99%)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 24
[24 (0.01% / 0.01%)] [327,753 / 44 (99.99%)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 9
[9 (0.00% / 0.00%)] [327,762 / 20 (100.00%)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 5
[5 (0.00% / 0.00%)] [327,767 / 11 (100.00%)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 2
[2 (0.00% / 0.00%)] [327,769 / 6 (100.00%)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 2
[2 (0.00% / 0.00%)] [327,771 / 4 (100.00%)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 1
[1 (0.00% / 0.00%)] [327,772 / 2 (100.00%)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 1
[1 (0.00% / 0.00%)] [327,773 / 1 (100.00%)]

Missing observations (25,422 / 7.20%)

Temperature

-15.5C - -14.6C -15.5C - -14.6C = 1
[1 (0.00% / 0.00%)] [1 / 328,046 (0.00%)]
-13.5C - -12.6C -13.5C - -12.6C = 1
[1 (0.00% / 0.00%)] [2 / 328,045 (0.00%)]
-12.5C - -11.6C -12.5C - -11.6C = 3
[3 (0.00% / 0.00%)] [5 / 328,044 (0.00%)]
-11.5C - -10.6C -11.5C - -10.6C = 1
[1 (0.00% / 0.00%)] [6 / 328,041 (0.00%)]
-10.5C - -9.6C -10.5C - -9.6C = 2
[2 (0.00% / 0.00%)] [8 / 328,040 (0.00%)]
-9.5C - -8.6C -9.5C - -8.6C = 4
[4 (0.00% / 0.00%)] [12 / 328,038 (0.00%)]
-8.5C - -7.6C -8.5C - -7.6C = 11
[11 (0.00% / 0.00%)] [23 / 328,034 (0.01%)]
-7.5C - -6.6C -7.5C - -6.6C = 45
[45 (0.01% / 0.01%)] [68 / 328,023 (0.02%)]
-6.5C - -5.6C -6.5C - -5.6C = 164
[164 (0.05% / 0.05%)] [232 / 327,978 (0.07%)]
-5.5C - -4.6C -5.5C - -4.6C = 408
[408 (0.12% / 0.12%)] [640 / 327,814 (0.20%)]
-4.5C - -3.6C -4.5C - -3.6C = 912
[912 (0.26% / 0.28%)] [1,552 / 327,406 (0.47%)]
-3.5C - -2.6C -3.5C - -2.6C = 1,653
[1,653 (0.47% / 0.50%)] [3,205 / 326,494 (0.98%)]
-2.5C - -1.6C -2.5C - -1.6C = 2,676
[2,676 (0.76% / 0.82%)] [5,881 / 324,841 (1.79%)]
-1.5C - -0.6C -1.5C - -0.6C = 3,879
[3,879 (1.10% / 1.18%)] [9,760 / 322,165 (2.98%)]
-0.5C - 0.4C -0.5C - 0.4C = 11,336
[11,336 (3.21% / 3.46%)] [21,096 / 318,286 (6.43%)]
0.5C - 1.4C 0.5C - 1.4C = 7,935
[7,935 (2.25% / 2.42%)] [29,031 / 306,950 (8.85%)]
1.5C - 2.4C 1.5C - 2.4C = 8,293
[8,293 (2.35% / 2.53%)] [37,324 / 299,015 (11.38%)]
2.5C - 3.4C 2.5C - 3.4C = 9,256
[9,256 (2.62% / 2.82%)] [46,580 / 290,722 (14.20%)]
3.5C - 4.4C 3.5C - 4.4C = 9,576
[9,576 (2.71% / 2.92%)] [56,156 / 281,466 (17.12%)]
4.5C - 5.4C 4.5C - 5.4C = 10,529
[10,529 (2.98% / 3.21%)] [66,685 / 271,890 (20.33%)]
5.5C - 6.4C 5.5C - 6.4C = 10,747
[10,747 (3.04% / 3.28%)] [77,432 / 261,361 (23.60%)]
6.5C - 7.4C 6.5C - 7.4C = 10,925
[10,925 (3.09% / 3.33%)] [88,357 / 250,614 (26.93%)]
7.5C - 8.4C 7.5C - 8.4C = 10,812
[10,812 (3.06% / 3.30%)] [99,169 / 239,689 (30.23%)]
8.5C - 9.4C 8.5C - 9.4C = 10,404
[10,404 (2.95% / 3.17%)] [109,573 / 228,877 (33.40%)]
9.5C - 10.4C 9.5C - 10.4C = 10,145
[10,145 (2.87% / 3.09%)] [119,718 / 218,473 (36.49%)]
10.5C - 11.4C 10.5C - 11.4C = 10,007
[10,007 (2.83% / 3.05%)] [129,725 / 208,328 (39.54%)]
11.5C - 12.4C 11.5C - 12.4C = 9,933
[9,933 (2.81% / 3.03%)] [139,658 / 198,321 (42.57%)]
12.5C - 13.4C 12.5C - 13.4C = 9,993
[9,993 (2.83% / 3.05%)] [149,651 / 188,388 (45.62%)]
13.5C - 14.4C 13.5C - 14.4C = 10,311
[10,311 (2.92% / 3.14%)] [159,962 / 178,395 (48.76%)]
14.5C - 15.4C 14.5C - 15.4C = 10,750
[10,750 (3.04% / 3.28%)] [170,712 / 168,084 (52.04%)]
15.5C - 16.4C 15.5C - 16.4C = 11,484
[11,484 (3.25% / 3.50%)] [182,196 / 157,334 (55.54%)]
16.5C - 17.4C 16.5C - 17.4C = 12,447
[12,447 (3.52% / 3.79%)] [194,643 / 145,850 (59.33%)]
17.5C - 18.4C 17.5C - 18.4C = 13,128
[13,128 (3.72% / 4.00%)] [207,771 / 133,403 (63.34%)]
18.5C - 19.4C 18.5C - 19.4C = 13,503
[13,503 (3.82% / 4.12%)] [221,274 / 120,275 (67.45%)]
19.5C - 20.4C 19.5C - 20.4C = 13,567
[13,567 (3.84% / 4.14%)] [234,841 / 106,772 (71.59%)]
20.5C - 21.4C 20.5C - 21.4C = 12,932
[12,932 (3.66% / 3.94%)] [247,773 / 93,205 (75.53%)]
21.5C - 22.4C 21.5C - 22.4C = 12,677
[12,677 (3.59% / 3.86%)] [260,450 / 80,273 (79.39%)]
22.5C - 23.4C 22.5C - 23.4C = 12,521
[12,521 (3.55% / 3.82%)] [272,971 / 67,596 (83.21%)]
23.5C - 24.4C 23.5C - 24.4C = 12,406
[12,406 (3.51% / 3.78%)] [285,377 / 55,075 (86.99%)]
24.5C - 25.4C 24.5C - 25.4C = 10,564
[10,564 (2.99% / 3.22%)] [295,941 / 42,669 (90.21%)]
25.5C - 26.4C 25.5C - 26.4C = 8,209
[8,209 (2.32% / 2.50%)] [304,150 / 32,105 (92.72%)]
26.5C - 27.4C 26.5C - 27.4C = 5,962
[5,962 (1.69% / 1.82%)] [310,112 / 23,896 (94.53%)]
27.5C - 28.4C 27.5C - 28.4C = 4,530
[4,530 (1.28% / 1.38%)] [314,642 / 17,934 (95.91%)]
28.5C - 29.4C 28.5C - 29.4C = 3,845
[3,845 (1.09% / 1.17%)] [318,487 / 13,404 (97.09%)]
29.5C - 30.4C 29.5C - 30.4C = 3,031
[3,031 (0.86% / 0.92%)] [321,518 / 9,559 (98.01%)]
30.5C - 31.4C 30.5C - 31.4C = 2,522
[2,522 (0.71% / 0.77%)] [324,040 / 6,528 (98.78%)]
31.5C - 32.4C 31.5C - 32.4C = 1,912
[1,912 (0.54% / 0.58%)] [325,952 / 4,006 (99.36%)]
32.5C - 33.4C 32.5C - 33.4C = 1,213
[1,213 (0.34% / 0.37%)] [327,165 / 2,094 (99.73%)]
33.5C - 34.4C 33.5C - 34.4C = 573
[573 (0.16% / 0.17%)] [327,738 / 881 (99.91%)]
34.5C - 35.4C 34.5C - 35.4C = 231
[231 (0.07% / 0.07%)] [327,969 / 308 (99.98%)]
35.5C - 36.4C 35.5C - 36.4C = 62
[62 (0.02% / 0.02%)] [328,031 / 77 (100.00%)]
36.5C - 37.4C 36.5C - 37.4C = 11
[11 (0.00% / 0.00%)] [328,042 / 15 (100.00%)]
37.5C - 38.4C 37.5C - 38.4C = 4
[4 (0.00% / 0.00%)] [328,046 / 4 (100.00%)]

Missing observations (25,149 / 7.12%)

Sunshine Duration

0.0h 0.0h = 230,741
[230,741 (65.33% / 70.36%)] [230,741 / 327,952 (70.36%)]
0.1h 0.1h = 6,839
[6,839 (1.94% / 2.09%)] [237,580 / 97,211 (72.44%)]
0.2h 0.2h = 5,320
[5,320 (1.51% / 1.62%)] [242,900 / 90,372 (74.07%)]
0.3h 0.3h = 4,609
[4,609 (1.30% / 1.41%)] [247,509 / 85,052 (75.47%)]
0.4h 0.4h = 4,286
[4,286 (1.21% / 1.31%)] [251,795 / 80,443 (76.78%)]
0.5h 0.5h = 4,368
[4,368 (1.24% / 1.33%)] [256,163 / 76,157 (78.11%)]
0.6h 0.6h = 4,362
[4,362 (1.24% / 1.33%)] [260,525 / 71,789 (79.44%)]
0.7h 0.7h = 4,596
[4,596 (1.30% / 1.40%)] [265,121 / 67,427 (80.84%)]
0.8h 0.8h = 5,231
[5,231 (1.48% / 1.60%)] [270,352 / 62,831 (82.44%)]
0.9h 0.9h = 7,104
[7,104 (2.01% / 2.17%)] [277,456 / 57,600 (84.60%)]
1.0h 1.0h = 50,496
[50,496 (14.30% / 15.40%)] [327,952 / 50,496 (100.00%)]

Missing observations (25,243 / 7.15%)