３か月ごとの値
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倶知安（後志地方) 2004年（３か月ごとの値） 詳細（気圧・降水量）
| 月～月 | 気圧(hPa) | 降水量(mm) | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 現地 | 海面 | 合計 | 最大 | 各階級の日数 | |||||||||||||||||
| 平均 | 平均 | 最低 | 日 | 24時間 | 1時間 | 10分間 | ≧0.0mm | ≧0.5mm | ≧1.0mm | ≧10.0mm | ≧30.0mm | ≧50.0mm | ≧70.0mm | ≧100.0mm | |||||||
| 値 | 日 | 値 | 日 | 値 | 月日時～月日時 | 値 | 日 | 値 | 日 | ||||||||||||
11～1 | 991.7 | 1015.3 | 990.1 | 12/25 | 389.0 | 16.0 | 01/04* | 22.5 | 01/10 18～01/11 18 | 6.5 | 11/03 | 3.0 | 11/03 | 85 | 67 | 60 | 17 | 0 | 0 | 0 | 0 |
12～2 | 988.1 | 1011.8 | 975.0 | 02/23 | 504.5 | 37.5 | 02/22 | 54.0 | 02/22 11～02/23 11 | 6.0 | 12/25 | 2.5 | 12/25 | 87 | 78 | 72 | 21 | 1 | 0 | 0 | 0 |
1～3 | 988.9 | 1012.5 | 975.0 | 02/23 | 475.5 | 37.5 | 02/22 | 54.0 | 02/22 11～02/23 11 | 7.5 | 03/11 | 2.0 | 03/11* | 86 | 78 | 70 | 16 | 1 | 0 | 0 | 0 |
2～4 | 988.2 | 1011.6 | 975.0 | 02/23 | 385.0 | 37.5 | 02/22 | 54.0 | 02/22 11～02/23 11 | 7.5 | 03/11 | 2.0 | 03/11 | 79 | 66 | 53 | 12 | 1 | 0 | 0 | 0 |
3～5 | 988.7 | 1011.7 | 988.5 | 04/20 | 276.0 | 29.0 | 04/20 | 30.0 | 04/19 23～04/20 22 | 7.5 | 03/11 | 2.0 | 05/13* | 70 | 54 | 41 | 7 | 0 | 0 | 0 | 0 |
4～6 | 987.7 | 1010.2 | 988.5 | 04/20 | 217.0 | 35.0 | 06/30 | 35.5 | 06/30 09～07/01 03 | 6.0 | 06/30* | 3.0 | 06/21 | 63 | 37 | 26 | 6 | 1 | 0 | 0 | 0 |
5～7 | 987.5 | 1009.5 | 989.2 | 06/22 | 239.5 | 35.0 | 06/30 | 35.5 | 06/30 09～07/01 03 | 22.0 | 07/26 | 15.0 | 07/26 | 60 | 34 | 29 | 7 | 1 | 0 | 0 | 0 |
6～8 | 987.3 | 1009.1 | 978.5 | 08/31 | 303.0 | 58.0 | 08/20 | 70.0 | 08/15 11～08/16 10 | 22.0 | 07/26 | 15.0 | 07/26 | 62 | 29 | 25 | 8 | 3 | 2 | 0 | 0 |
7～9 | 989.2 | 1011.0 | 972.7 | 09/08 | 389.5 | 58.0 | 08/20 | 70.0 | 08/15 11～08/16 10 | 22.0 | 07/26 | 15.0 | 07/26 | 62 | 37 | 31 | 12 | 4 | 2 | 0 | 0 |
8～10 | 992.4 | 1014.6 | 972.7 | 09/08 | 389.0 | 58.0 | 08/20 | 70.0 | 08/15 11～08/16 10 | 17.0 | 09/19* | 11.5 | 08/15 | 58 | 35 | 32 | 12 | 4 | 2 | 0 | 0 |
9～11 | 994.4 | 1017.1 | 972.7 | 09/08 | 355.5 | 32.5 | 09/19 | 39.5 | 09/18 21～09/19 09 | 17.0 | 09/19 | 7.5 | 09/19 | 62 | 45 | 41 | 11 | 2 | 0 | 0 | 0 |
10～12 | 994.2 | 1017.5 | 983.4 | 11/27 | 472.5 | 45.0 | 12/05 | 47.5 | 12/04 22～12/05 22 | 9.0 | 11/12* | 3.5 | 10/02 | 74 | 60 | 56 | 15 | 1 | 0 | 0 | 0 |