旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
札幌（石狩地方) 1991年（旬ごとの値） 詳細（気圧・降水量）
| 月 | 旬 | 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 | 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 | 日 | 値 | 日 | |||||||||||||
| 上旬 | 1000.7 | 1003.1 | -- | 49.0 | 15.0 | 06 | 3.5 | 08* | 1.5 | 09* | 10 | 8 | 8 | 1 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1013.1 | 1015.5 | -- | 29.5 | 21.5 | 17 | 5.0 | 17 | 1.5 | 17 | 8 | 5 | 4 | 1 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1014.2 | 1016.5 | -- | 103.5 | 26.0 | 22 | 4.0 | 21 | 1.5 | 21 | 11 | 10 | 10 | 6 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1008.3 | 1010.7 | -- | 29.5 | 9.0 | 09 | 3.0 | 05 | 1.5 | 05 | 10 | 9 | 7 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1011.2 | 1013.6 | -- | 68.0 | 31.0 | 16 | 3.5 | 16* | 1.5 | 12 | 7 | 7 | 6 | 2 | 1 | 0 | 0 | 0 | ||
| 下旬 | 1009.5 | 1011.9 | -- | 8.5 | 3.0 | 21 | 1.5 | 21 | 1.0 | 21 | 8 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1011.3 | 1013.7 | -- | 29.0 | 16.0 | 07 | 4.0 | 07 | 1.5 | 07 | 9 | 7 | 5 | 1 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1012.1 | 1014.5 | -- | 21.0 | 8.5 | 20 | 3.5 | 12 | 1.0 | 12 | 10 | 6 | 5 | 0 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1018.1 | 1020.4 | -- | 10.5 | 4.5 | 29 | 1.5 | 29 | 1.0 | 29 | 8 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1016.8 | 1019.1 | -- | 12.5 | 6.0 | 08 | 2.5 | 09* | 1.0 | 08* | 6 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1005.3 | 1007.6 | -- | 16.0 | 7.5 | 20 | 5.0 | 20 | 2.5 | 20 | 6 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1013.7 | 1015.9 | -- | 49.0 | 24.0 | 30 | 5.5 | 30 | 1.5 | 30* | 7 | 3 | 3 | 2 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1008.1 | 1010.4 | -- | 4.0 | 2.5 | 01 | 1.5 | 01 | 0.5 | 09* | 6 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1005.1 | 1007.3 | -- | 19.0 | 13.0 | 16 | 5.0 | 16 | 2.0 | 16 | 6 | 4 | 3 | 1 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1011.6 | 1013.9 | -- | 0.0 | 0.0 | 27* | 0.0 | 27* | 0.0 | 27* | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1007.8 | 1010.0 | -- | 5.0 | 5.0 | 02 | 4.0 | 02 | 3.5 | 02 | 5 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1001.1 | 1003.3 | -- | 23.0 | 16.5 | 16 | 16.5 | 16 | 11.5 | 16 | 9 | 3 | 3 | 1 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1005.6 | 1007.8 | -- | 0.0 | 0.0 | 30* | 0.0 | 30* | 0.0 | 30* | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1004.5 | 1006.7 | -- | 4.5 | 3.0 | 09 | 2.5 | 09 | 1.0 | 09 | 4 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1008.7 | 1010.9 | -- | 22.0 | 9.5 | 17 | 3.0 | 17 | 1.0 | 18* | 7 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1000.9 | 1003.1 | -- | 50.0 | 17.0 | 23 | 5.0 | 27 | 2.5 | 26 | 11 | 6 | 6 | 2 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1006.5 | 1008.7 | -- | 5.0 | 2.5 | 01 | 2.5 | 01 | 1.5 | 01 | 5 | 3 | 3 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1009.9 | 1012.0 | -- | 1.0 | 1.0 | 12 | 1.0 | 12 | 0.5 | 12 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1005.6 | 1007.8 | -- | 102.0 | 89.5 | 21 | 29.5 | 21 | 8.0 | 21 | 7 | 4 | 4 | 1 | 1 | 1 | 1 | 0 | ||
| 上旬 | 1008.7 | 1010.9 | -- | 16.5 | 9.0 | 05 | 5.0 | 06 | 2.5 | 06* | 4 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1011.8 | 1014.0 | -- | 5.0 | 5.0 | 12 | 2.5 | 12 | 1.0 | 12 | 8 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1011.7 | 1013.9 | 974.2 | 28 | 34.5 | 15.0 | 28 | 4.5 | 28 | 1.5 | 28* | 8 | 6 | 5 | 2 | 0 | 0 | 0 | 0 | |
| 上旬 | 1012.8 | 1015.1 | -- | 1.5 | 1.5 | 05 | 1.5 | 05 | 0.5 | 05 | 4 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1007.3 | 1009.6 | -- | 71.5 | 37.0 | 17 | 11.5 | 17 | 4.0 | 17 | 8 | 6 | 6 | 2 | 1 | 0 | 0 | 0 | ||
| 下旬 | 1013.2 | 1015.4 | -- | 11.0 | 4.0 | 21 | 3.0 | 21 | 1.0 | 21 | 11 | 5 | 4 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1015.2 | 1017.5 | -- | 23.5 | 7.0 | 04 | 6.5 ) | 04 | 3.0 ) | 04 | 9 | 8 | 6 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1012.5 | 1014.8 | -- | 26.5 | 17.0 | 20 | 3.5 | 20 | 1.5 | 20 | 10 | 8 | 6 | 1 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1017.0 | 1019.3 | -- | 4.0 | 2.5 | 23 | 0.5 | 25* | 0.5 | 25* | 8 | 4 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 上旬 | 1017.0 | 1019.3 | -- | 10.5 | 9.5 | 07 | 2.5 | 07 | 1.0 | 07 | 10 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | ||
| 中旬 | 1017.4 | 1019.8 | -- | 42.5 | 14.5 | 17 | 2.5 | 18* | 1.0 | 18* | 9 | 6 | 6 | 2 | 0 | 0 | 0 | 0 | ||
| 下旬 | 1011.8 | 1014.2 | -- | 64.0 | 22.5 | 30 | 4.0 | 30 | 2.0 | 30 | 11 | 7 | 7 | 3 | 0 | 0 | 0 | 0 | ||