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 495
Number of Observations 361,211
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 -- 2017/07/99 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 = 335,669
[335,669 (92.93% / 93.54%)] [335,669 / 358,853 (93.54)]
0.5mm - 1.4mm 0.5mm - 1.4mm = 12,624
[12,624 (3.49% / 3.52%)] [348,293 / 23,184 (97.06)]
1.5mm - 2.4mm 1.5mm - 2.4mm = 4,519
[4,519 (1.25% / 1.26%)] [352,812 / 10,560 (98.32)]
2.5mm - 3.4mm 2.5mm - 3.4mm = 2,183
[2,183 (0.60% / 0.61%)] [354,995 / 6,041 (98.92)]
3.5mm - 4.4mm 3.5mm - 4.4mm = 1,202
[1,202 (0.33% / 0.33%)] [356,197 / 3,858 (99.26)]
4.5mm - 5.4mm 4.5mm - 5.4mm = 716
[716 (0.20% / 0.20%)] [356,913 / 2,656 (99.46)]
5.5mm - 6.4mm 5.5mm - 6.4mm = 498
[498 (0.14% / 0.14%)] [357,411 / 1,940 (99.60)]
6.5mm - 7.4mm 6.5mm - 7.4mm = 343
[343 (0.09% / 0.10%)] [357,754 / 1,442 (99.69)]
7.5mm - 8.4mm 7.5mm - 8.4mm = 238
[238 (0.07% / 0.07%)] [357,992 / 1,099 (99.76)]
8.5mm - 9.4mm 8.5mm - 9.4mm = 170
[170 (0.05% / 0.05%)] [358,162 / 861 (99.81)]
9.5mm - 10.4mm 9.5mm - 10.4mm = 142
[142 (0.04% / 0.04%)] [358,304 / 691 (99.85)]
10.5mm - 11.4mm 10.5mm - 11.4mm = 96
[96 (0.03% / 0.03%)] [358,400 / 549 (99.87)]
11.5mm - 12.4mm 11.5mm - 12.4mm = 79
[79 (0.02% / 0.02%)] [358,479 / 453 (99.90)]
12.5mm - 13.4mm 12.5mm - 13.4mm = 60
[60 (0.02% / 0.02%)] [358,539 / 374 (99.91)]
13.5mm - 14.4mm 13.5mm - 14.4mm = 54
[54 (0.01% / 0.02%)] [358,593 / 314 (99.93)]
14.5mm - 15.4mm 14.5mm - 15.4mm = 43
[43 (0.01% / 0.01%)] [358,636 / 260 (99.94)]
15.5mm - 16.4mm 15.5mm - 16.4mm = 38
[38 (0.01% / 0.01%)] [358,674 / 217 (99.95)]
16.5mm - 17.4mm 16.5mm - 17.4mm = 18
[18 (0.00% / 0.01%)] [358,692 / 179 (99.96)]
17.5mm - 18.4mm 17.5mm - 18.4mm = 24
[24 (0.01% / 0.01%)] [358,716 / 161 (99.96)]
18.5mm - 19.4mm 18.5mm - 19.4mm = 17
[17 (0.00% / 0.00%)] [358,733 / 137 (99.97)]
19.5mm - 20.4mm 19.5mm - 20.4mm = 12
[12 (0.00% / 0.00%)] [358,745 / 120 (99.97)]
20.5mm - 21.4mm 20.5mm - 21.4mm = 9
[9 (0.00% / 0.00%)] [358,754 / 108 (99.97)]
21.5mm - 22.4mm 21.5mm - 22.4mm = 13
[13 (0.00% / 0.00%)] [358,767 / 99 (99.98)]
22.5mm - 23.4mm 22.5mm - 23.4mm = 13
[13 (0.00% / 0.00%)] [358,780 / 86 (99.98)]
23.5mm - 24.4mm 23.5mm - 24.4mm = 8
[8 (0.00% / 0.00%)] [358,788 / 73 (99.98)]
24.5mm - 25.4mm 24.5mm - 25.4mm = 11
[11 (0.00% / 0.00%)] [358,799 / 65 (99.98)]
25.5mm - 26.4mm 25.5mm - 26.4mm = 9
[9 (0.00% / 0.00%)] [358,808 / 54 (99.99)]
26.5mm - 27.4mm 26.5mm - 27.4mm = 5
[5 (0.00% / 0.00%)] [358,813 / 45 (99.99)]
27.5mm - 28.4mm 27.5mm - 28.4mm = 5
[5 (0.00% / 0.00%)] [358,818 / 40 (99.99)]
28.5mm - 29.4mm 28.5mm - 29.4mm = 6
[6 (0.00% / 0.00%)] [358,824 / 35 (99.99)]
29.5mm - 30.4mm 29.5mm - 30.4mm = 4
[4 (0.00% / 0.00%)] [358,828 / 29 (99.99)]
30.5mm - 31.4mm 30.5mm - 31.4mm = 5
[5 (0.00% / 0.00%)] [358,833 / 25 (99.99)]
31.5mm - 32.4mm 31.5mm - 32.4mm = 1
[1 (0.00% / 0.00%)] [358,834 / 20 (99.99)]
32.5mm - 33.4mm 32.5mm - 33.4mm = 2
[2 (0.00% / 0.00%)] [358,836 / 19 (100.00)]
33.5mm - 34.4mm 33.5mm - 34.4mm = 3
[3 (0.00% / 0.00%)] [358,839 / 17 (100.00)]
34.5mm - 35.4mm 34.5mm - 35.4mm = 2
[2 (0.00% / 0.00%)] [358,841 / 14 (100.00)]
36.5mm - 37.4mm 36.5mm - 37.4mm = 2
[2 (0.00% / 0.00%)] [358,843 / 12 (100.00)]
38.5mm - 39.4mm 38.5mm - 39.4mm = 1
[1 (0.00% / 0.00%)] [358,844 / 10 (100.00)]
39.5mm - 40.4mm 39.5mm - 40.4mm = 1
[1 (0.00% / 0.00%)] [358,845 / 9 (100.00)]
40.5mm - 41.4mm 40.5mm - 41.4mm = 2
[2 (0.00% / 0.00%)] [358,847 / 8 (100.00)]
44.5mm - 45.4mm 44.5mm - 45.4mm = 1
[1 (0.00% / 0.00%)] [358,848 / 6 (100.00)]
46.5mm - 47.4mm 46.5mm - 47.4mm = 1
[1 (0.00% / 0.00%)] [358,849 / 5 (100.00)]
50.5mm - 51.4mm 50.5mm - 51.4mm = 1
[1 (0.00% / 0.00%)] [358,850 / 4 (100.00)]
53.5mm - 54.4mm 53.5mm - 54.4mm = 1
[1 (0.00% / 0.00%)] [358,851 / 3 (100.00)]
54.5mm - 55.4mm 54.5mm - 55.4mm = 1
[1 (0.00% / 0.00%)] [358,852 / 2 (100.00)]
84.5mm - 85.4mm 84.5mm - 85.4mm = 1
[1 (0.00% / 0.00%)] [358,853 / 1 (100.00)]

Missing observations (2,358 / 0.65%)

Wind Direction

Calm Calm = 31,970
[31,970 (8.85% / 9.52%)]
NNE NNE = 26,716
[26,716 (7.40% / 7.96%)]
NE NE = 39,181
[39,181 (10.85% / 11.67%)]
ENE ENE = 33,344
[33,344 (9.23% / 9.93%)]
E E = 18,740
[18,740 (5.19% / 5.58%)]
ESE ESE = 9,294
[9,294 (2.57% / 2.77%)]
SE SE = 10,354
[10,354 (2.87% / 3.08%)]
SSE SSE = 15,433
[15,433 (4.27% / 4.60%)]
S S = 12,920
[12,920 (3.58% / 3.85%)]
SSW SSW = 22,349
[22,349 (6.19% / 6.66%)]
SW SW = 14,434
[14,434 (4.00% / 4.30%)]
WSW WSW = 9,015
[9,015 (2.50% / 2.69%)]
W W = 17,117
[17,117 (4.74% / 5.10%)]
WNW WNW = 24,370
[24,370 (6.75% / 7.26%)]
NW NW = 17,983
[17,983 (4.98% / 5.36%)]
NNW NNW = 14,537
[14,537 (4.02% / 4.33%)]
N N = 17,962
[17,962 (4.97% / 5.35%)]

Missing observations (25,492 / 7.06%)

Wind Speed

0.0m/s - 0.4m/s 0.0m/s - 0.4m/s = 33,184
[33,184 (9.19% / 9.88%)] [33,184 / 335,786 (9.88)]
0.5m/s - 1.4m/s 0.5m/s - 1.4m/s = 77,051
[77,051 (21.33% / 22.95%)] [110,235 / 302,602 (32.83)]
1.5m/s - 2.4m/s 1.5m/s - 2.4m/s = 82,869
[82,869 (22.94% / 24.68%)] [193,104 / 225,551 (57.51)]
2.5m/s - 3.4m/s 2.5m/s - 3.4m/s = 55,331
[55,331 (15.32% / 16.48%)] [248,435 / 142,682 (73.99)]
3.5m/s - 4.4m/s 3.5m/s - 4.4m/s = 36,757
[36,757 (10.18% / 10.95%)] [285,192 / 87,351 (84.93)]
4.5m/s - 5.4m/s 4.5m/s - 5.4m/s = 22,681
[22,681 (6.28% / 6.75%)] [307,873 / 50,594 (91.69)]
5.5m/s - 6.4m/s 5.5m/s - 6.4m/s = 12,940
[12,940 (3.58% / 3.85%)] [320,813 / 27,913 (95.54)]
6.5m/s - 7.4m/s 6.5m/s - 7.4m/s = 6,832
[6,832 (1.89% / 2.03%)] [327,645 / 14,973 (97.58)]
7.5m/s - 8.4m/s 7.5m/s - 8.4m/s = 3,746
[3,746 (1.04% / 1.12%)] [331,391 / 8,141 (98.69)]
8.5m/s - 9.4m/s 8.5m/s - 9.4m/s = 2,101
[2,101 (0.58% / 0.63%)] [333,492 / 4,395 (99.32)]
9.5m/s - 10.4m/s 9.5m/s - 10.4m/s = 1,158
[1,158 (0.32% / 0.34%)] [334,650 / 2,294 (99.66)]
10.5m/s - 11.4m/s 10.5m/s - 11.4m/s = 614
[614 (0.17% / 0.18%)] [335,264 / 1,136 (99.84)]
11.5m/s - 12.4m/s 11.5m/s - 12.4m/s = 268
[268 (0.07% / 0.08%)] [335,532 / 522 (99.92)]
12.5m/s - 13.4m/s 12.5m/s - 13.4m/s = 140
[140 (0.04% / 0.04%)] [335,672 / 254 (99.97)]
13.5m/s - 14.4m/s 13.5m/s - 14.4m/s = 70
[70 (0.02% / 0.02%)] [335,742 / 114 (99.99)]
14.5m/s - 15.4m/s 14.5m/s - 15.4m/s = 24
[24 (0.01% / 0.01%)] [335,766 / 44 (99.99)]
15.5m/s - 16.4m/s 15.5m/s - 16.4m/s = 9
[9 (0.00% / 0.00%)] [335,775 / 20 (100.00)]
16.5m/s - 17.4m/s 16.5m/s - 17.4m/s = 5
[5 (0.00% / 0.00%)] [335,780 / 11 (100.00)]
17.5m/s - 18.4m/s 17.5m/s - 18.4m/s = 2
[2 (0.00% / 0.00%)] [335,782 / 6 (100.00)]
18.5m/s - 19.4m/s 18.5m/s - 19.4m/s = 2
[2 (0.00% / 0.00%)] [335,784 / 4 (100.00)]
19.5m/s - 20.4m/s 19.5m/s - 20.4m/s = 1
[1 (0.00% / 0.00%)] [335,785 / 2 (100.00)]
21.5m/s - 22.4m/s 21.5m/s - 22.4m/s = 1
[1 (0.00% / 0.00%)] [335,786 / 1 (100.00)]

Missing observations (25,425 / 7.04%)

Temperature

-15.5C - -14.6C -15.5C - -14.6C = 1
[1 (0.00% / 0.00%)] [1 / 336,059 (0.00)]
-13.5C - -12.6C -13.5C - -12.6C = 1
[1 (0.00% / 0.00%)] [2 / 336,058 (0.00)]
-12.5C - -11.6C -12.5C - -11.6C = 3
[3 (0.00% / 0.00%)] [5 / 336,057 (0.00)]
-11.5C - -10.6C -11.5C - -10.6C = 1
[1 (0.00% / 0.00%)] [6 / 336,054 (0.00)]
-10.5C - -9.6C -10.5C - -9.6C = 2
[2 (0.00% / 0.00%)] [8 / 336,053 (0.00)]
-9.5C - -8.6C -9.5C - -8.6C = 4
[4 (0.00% / 0.00%)] [12 / 336,051 (0.00)]
-8.5C - -7.6C -8.5C - -7.6C = 11
[11 (0.00% / 0.00%)] [23 / 336,047 (0.01)]
-7.5C - -6.6C -7.5C - -6.6C = 45
[45 (0.01% / 0.01%)] [68 / 336,036 (0.02)]
-6.5C - -5.6C -6.5C - -5.6C = 164
[164 (0.05% / 0.05%)] [232 / 335,991 (0.07)]
-5.5C - -4.6C -5.5C - -4.6C = 411
[411 (0.11% / 0.12%)] [643 / 335,827 (0.19)]
-4.5C - -3.6C -4.5C - -3.6C = 920
[920 (0.25% / 0.27%)] [1,563 / 335,416 (0.47)]
-3.5C - -2.6C -3.5C - -2.6C = 1,682
[1,682 (0.47% / 0.50%)] [3,245 / 334,496 (0.97)]
-2.5C - -1.6C -2.5C - -1.6C = 2,746
[2,746 (0.76% / 0.82%)] [5,991 / 332,814 (1.78)]
-1.5C - -0.6C -1.5C - -0.6C = 3,974
[3,974 (1.10% / 1.18%)] [9,965 / 330,068 (2.97)]
-0.5C - 0.4C -0.5C - 0.4C = 11,616
[11,616 (3.22% / 3.46%)] [21,581 / 326,094 (6.42)]
0.5C - 1.4C 0.5C - 1.4C = 8,125
[8,125 (2.25% / 2.42%)] [29,706 / 314,478 (8.84)]
1.5C - 2.4C 1.5C - 2.4C = 8,523
[8,523 (2.36% / 2.54%)] [38,229 / 306,353 (11.38)]
2.5C - 3.4C 2.5C - 3.4C = 9,482
[9,482 (2.63% / 2.82%)] [47,711 / 297,830 (14.20)]
3.5C - 4.4C 3.5C - 4.4C = 9,804
[9,804 (2.71% / 2.92%)] [57,515 / 288,348 (17.11)]
4.5C - 5.4C 4.5C - 5.4C = 10,792
[10,792 (2.99% / 3.21%)] [68,307 / 278,544 (20.33)]
5.5C - 6.4C 5.5C - 6.4C = 11,025
[11,025 (3.05% / 3.28%)] [79,332 / 267,752 (23.61)]
6.5C - 7.4C 6.5C - 7.4C = 11,210
[11,210 (3.10% / 3.34%)] [90,542 / 256,727 (26.94)]
7.5C - 8.4C 7.5C - 8.4C = 11,117
[11,117 (3.08% / 3.31%)] [101,659 / 245,517 (30.25)]
8.5C - 9.4C 8.5C - 9.4C = 10,741
[10,741 (2.97% / 3.20%)] [112,400 / 234,400 (33.45)]
9.5C - 10.4C 9.5C - 10.4C = 10,473
[10,473 (2.90% / 3.12%)] [122,873 / 223,659 (36.56)]
10.5C - 11.4C 10.5C - 11.4C = 10,298
[10,298 (2.85% / 3.06%)] [133,171 / 213,186 (39.63)]
11.5C - 12.4C 11.5C - 12.4C = 10,190
[10,190 (2.82% / 3.03%)] [143,361 / 202,888 (42.66)]
12.5C - 13.4C 12.5C - 13.4C = 10,233
[10,233 (2.83% / 3.05%)] [153,594 / 192,698 (45.70)]
13.5C - 14.4C 13.5C - 14.4C = 10,496
[10,496 (2.91% / 3.12%)] [164,090 / 182,465 (48.83)]
14.5C - 15.4C 14.5C - 15.4C = 10,950
[10,950 (3.03% / 3.26%)] [175,040 / 171,969 (52.09)]
15.5C - 16.4C 15.5C - 16.4C = 11,804
[11,804 (3.27% / 3.51%)] [186,844 / 161,019 (55.60)]
16.5C - 17.4C 16.5C - 17.4C = 12,754
[12,754 (3.53% / 3.80%)] [199,598 / 149,215 (59.39)]
17.5C - 18.4C 17.5C - 18.4C = 13,410
[13,410 (3.71% / 3.99%)] [213,008 / 136,461 (63.38)]
18.5C - 19.4C 18.5C - 19.4C = 13,804
[13,804 (3.82% / 4.11%)] [226,812 / 123,051 (67.49)]
19.5C - 20.4C 19.5C - 20.4C = 13,813
[13,813 (3.82% / 4.11%)] [240,625 / 109,247 (71.60)]
20.5C - 21.4C 20.5C - 21.4C = 13,242
[13,242 (3.67% / 3.94%)] [253,867 / 95,434 (75.54)]
21.5C - 22.4C 21.5C - 22.4C = 13,044
[13,044 (3.61% / 3.88%)] [266,911 / 82,192 (79.42)]
22.5C - 23.4C 22.5C - 23.4C = 12,822
[12,822 (3.55% / 3.82%)] [279,733 / 69,148 (83.24)]
23.5C - 24.4C 23.5C - 24.4C = 12,695
[12,695 (3.51% / 3.78%)] [292,428 / 56,326 (87.02)]
24.5C - 25.4C 24.5C - 25.4C = 10,798
[10,798 (2.99% / 3.21%)] [303,226 / 43,631 (90.23)]
25.5C - 26.4C 25.5C - 26.4C = 8,403
[8,403 (2.33% / 2.50%)] [311,629 / 32,833 (92.73)]
26.5C - 27.4C 26.5C - 27.4C = 6,112
[6,112 (1.69% / 1.82%)] [317,741 / 24,430 (94.55)]
27.5C - 28.4C 27.5C - 28.4C = 4,646
[4,646 (1.29% / 1.38%)] [322,387 / 18,318 (95.93)]
28.5C - 29.4C 28.5C - 29.4C = 3,926
[3,926 (1.09% / 1.17%)] [326,313 / 13,672 (97.10)]
29.5C - 30.4C 29.5C - 30.4C = 3,096
[3,096 (0.86% / 0.92%)] [329,409 / 9,746 (98.02)]
30.5C - 31.4C 30.5C - 31.4C = 2,579
[2,579 (0.71% / 0.77%)] [331,988 / 6,650 (98.79)]
31.5C - 32.4C 31.5C - 32.4C = 1,952
[1,952 (0.54% / 0.58%)] [333,940 / 4,071 (99.37)]
32.5C - 33.4C 32.5C - 33.4C = 1,233
[1,233 (0.34% / 0.37%)] [335,173 / 2,119 (99.74)]
33.5C - 34.4C 33.5C - 34.4C = 578
[578 (0.16% / 0.17%)] [335,751 / 886 (99.91)]
34.5C - 35.4C 34.5C - 35.4C = 231
[231 (0.06% / 0.07%)] [335,982 / 308 (99.98)]
35.5C - 36.4C 35.5C - 36.4C = 62
[62 (0.02% / 0.02%)] [336,044 / 77 (100.00)]
36.5C - 37.4C 36.5C - 37.4C = 11
[11 (0.00% / 0.00%)] [336,055 / 15 (100.00)]
37.5C - 38.4C 37.5C - 38.4C = 4
[4 (0.00% / 0.00%)] [336,059 / 4 (100.00)]

Missing observations (25,152 / 6.96%)

Sunshine Duration

0.0h 0.0h = 236,131
[236,131 (65.37% / 70.28%)] [236,131 / 335,963 (70.28)]
0.1h 0.1h = 7,031
[7,031 (1.95% / 2.09%)] [243,162 / 99,832 (72.38)]
0.2h 0.2h = 5,451
[5,451 (1.51% / 1.62%)] [248,613 / 92,801 (74.00)]
0.3h 0.3h = 4,728
[4,728 (1.31% / 1.41%)] [253,341 / 87,350 (75.41)]
0.4h 0.4h = 4,422
[4,422 (1.22% / 1.32%)] [257,763 / 82,622 (76.72)]
0.5h 0.5h = 4,510
[4,510 (1.25% / 1.34%)] [262,273 / 78,200 (78.07)]
0.6h 0.6h = 4,482
[4,482 (1.24% / 1.33%)] [266,755 / 73,690 (79.40)]
0.7h 0.7h = 4,730
[4,730 (1.31% / 1.41%)] [271,485 / 69,208 (80.81)]
0.8h 0.8h = 5,382
[5,382 (1.49% / 1.60%)] [276,867 / 64,478 (82.41)]
0.9h 0.9h = 7,296
[7,296 (2.02% / 2.17%)] [284,163 / 59,096 (84.58)]
1.0h 1.0h = 51,800
[51,800 (14.34% / 15.42%)] [335,963 / 51,800 (100.00)]

Missing observations (25,248 / 6.99%)