旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |
初山別（留萌地方) 1981年（旬ごとの値） 主な要素
| 月 | 旬 | 降水量 | 気温 | 湿度 | 風向・風速 | 日照 時間 (h) |
雪 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 合計 (mm) | 最大 | 平均 | 最高 (℃) | 最低 (℃) |
平均 (％) | 最小 (％) |
平均 風速 (m/s) | 最大風速 | 最大瞬間風速 | 降雪の深さ | 最深 積雪 (cm) |
||||||||||
| 日 (mm) | 1時間 (mm) | 10分間 (mm) |
日平均 (℃) | 日最高 (℃) | 日最低 (℃) |
風速 (m/s) | 風向 | 風速 (m/s) | 風向 | 合計 (cm) | 日合計の最大 (cm) |
||||||||||
| 上旬 | 25 | 10 | 2 | /// | -5.4 | -2.0 | -10.1 | 1.1 | -16.3 | /// | /// | 3.8 | 13 | 東南東 | /// | /// | 32.2 | /// | /// | /// | |
| 中旬 | 8 | 4 | 1 | /// | -8.2 | -2.6 | -15.1 | -1.3 | -19.5 | /// | /// | 2.8 | 8 | 西 | /// | /// | 49.5 | /// | /// | /// | |
| 下旬 | 47 | 17 | 2 | /// | -7.7 | -4.4 | -11.2 | 0.4 | -17.8 | /// | /// | 3.5 | 11 | 東 | /// | /// | 28.7 | /// | /// | /// | |
| 上旬 | 10 | 4 | 3 | /// | -5.6 | -1.3 ) | -12.2 ) | 0.6 ) | -16.6 ] | /// | /// | 3.6 | 10 ) | 西北西 | /// | /// | 46.1 | /// | /// | /// | |
| 中旬 | 6 | 4 | 1 | /// | -4.4 | -0.4 | -10.2 | 1.9 | -18.8 | /// | /// | 3.0 | 8 | 東 | /// | /// | 50.4 | /// | /// | /// | |
| 下旬 | 6 | 2 | 1 | /// | -8.3 | -4.8 | -13.3 | -2.9 | -19.2 | /// | /// | 3.7 | 9 | 西北西 | /// | /// | 38.5 | /// | /// | /// | |
| 上旬 | 18 | 6 | 2 | /// | -4.7 ) | -1.2 ) | -8.8 ) | 1.5 ) | -17.0 ) | /// | /// | 5.0 | 14 | 西北西 | /// | /// | 51.3 | /// | /// | /// | |
| 中旬 | 41 | 25 | 3 | /// | -1.2 | 2.6 ) | -6.6 ) | 4.9 ) | -15.0 ) | /// | /// | 3.5 | 8 | 西南西 | /// | /// | 43.0 | /// | /// | /// | |
| 下旬 | 12 | 4 | 1 | /// | -1.6 | 1.7 | -6.0 | 4.4 | -9.8 | /// | /// | 3.0 | 8 | 東 | /// | /// | 78.7 | /// | /// | /// | |
| 上旬 | 7 | 3 | 1 | /// | 4.5 | 7.5 | 0.4 | 15.1 | -2.5 | /// | /// | 3.5 | 8 | 北 | /// | /// | 60.6 | /// | /// | /// | |
| 中旬 | 22 | 13 | 4 | /// | 2.9 ) | 5.9 ) | -1.0 ) | 9.0 ) | -2.4 ) | /// | /// | 3.1 | 8 | 西 | /// | /// | 56.8 | /// | /// | /// | |
| 下旬 | 28 | 11 | 3 | /// | 8.7 | 12.8 | 4.3 | 19.2 | 0.7 | /// | /// | 3.9 | 8 | 南南西 | /// | /// | 62.7 | /// | /// | /// | |
| 上旬 | 10 | 6 | 2 | /// | 10.6 | 14.7 | 6.3 | 19.2 | 3.7 | /// | /// | 3.6 | 9 | 西南西 | /// | /// | 67.8 | /// | /// | /// | |
| 中旬 | 26 ) | 20 ) | 5 ) | /// | 8.3 | 13.3 ) | 3.4 ) | 19.6 ) | -0.5 ) | /// | /// | 2.9 | 7 ) | 東南東 | /// | /// | 65.2 ) | /// | /// | /// | |
| 下旬 | 23 | 11 | 2 | /// | 8.3 | 11.3 ) | 4.6 ) | 17.2 ) | 1.1 ) | /// | /// | 3.3 | 8 | 東 | /// | /// | 59.8 | /// | /// | /// | |
| 上旬 | 6 | 3 | 3 | /// | 12.0 | 15.5 | 8.5 | 18.4 | 2.0 | /// | /// | 2.1 | 5 | 北西 | /// | /// | 92.3 | /// | /// | /// | |
| 中旬 | 10 | 6 | 2 | /// | 14.1 | 16.3 | 12.1 | 20.9 | 11.5 | /// | /// | 1.6 | 4 | 北西 | /// | /// | 40.8 | /// | /// | /// | |
| 下旬 | 23 | 18 | 4 | /// | 15.7 | 19.2 ) | 12.0 ) | 23.0 ) | 8.8 ) | /// | /// | 2.2 | 7 | 西南西 | /// | /// | 47.6 | /// | /// | /// | |
| 上旬 | 41 | 14 | 7 | /// | 16.8 | 19.8 | 14.6 | 22.2 | 13.3 | /// | /// | 2.6 | 7 | 南南東 | /// | /// | 32.9 | /// | /// | /// | |
| 中旬 | 13 | 8 | 5 | /// | 19.6 | 23.0 ) | 17.0 ) | 27.0 ) | 13.6 ) | /// | /// | 2.6 | 6 | 南南西 | /// | /// | 50.2 | /// | /// | /// | |
| 下旬 | 3 | 3 | 2 | /// | 20.3 | 24.5 | 15.9 | 28.0 | 11.9 | /// | /// | 2.4 | 5 | 南南西 | /// | /// | 100.4 | /// | /// | /// | |
| 上旬 | 201 | 75 | 24 | /// | 20.6 | 24.1 | 17.5 | 28.9 | 14.6 | /// | /// | 3.1 | 10 | 南南西 | /// | /// | 46.5 | /// | /// | /// | |
| 中旬 | 39 | 26 | 6 | /// | 18.3 | 21.7 ) | 15.1 ) | 23.8 ) | 11.9 ) | /// | /// | 1.8 | 6 | 東北東 | /// | /// | 42.0 | /// | /// | /// | |
| 下旬 | 49 | 27 | 6 | /// | 18.9 ) | 21.4 ) | 16.2 ) | 25.6 ] | 11.5 ) | /// | /// | 3.7 | 17 | 南南西 | /// | /// | 48.7 | /// | /// | /// | |
| 上旬 | 93 | 52 | 11 | /// | 15.9 | 18.7 | 12.5 | 21.6 | 9.6 | /// | /// | 4.1 | 9 | 西 | /// | /// | 53.3 | /// | /// | /// | |
| 中旬 | 64 | 52 | 8 | /// | 15.1 | 18.8 ) | 10.6 ) | 20.1 ) | 6.8 ) | /// | /// | 3.6 | 9 | 南南西 | /// | /// | 67.3 | /// | /// | /// | |
| 下旬 | 37 | 19 | 15 | /// | 15.0 | 18.6 | 11.0 | 21.4 | 8.6 | /// | /// | 3.5 | 9 | 西北西 | /// | /// | 62.2 | /// | /// | /// | |
| 上旬 | 46 | 17 | 5 | /// | 12.9 | 16.2 ] | 8.4 ] | 18.4 ] | 6.9 ] | /// | /// | 4.6 | 13 | 西南西 | /// | /// | 53.1 | /// | /// | /// | |
| 中旬 | 44 | 15 | 5 | /// | 9.8 ) | 12.4 ] | 6.0 ] | 17.8 ] | 2.3 ] | /// | /// | 4.5 | 11 ) | 西 | /// | /// | 50.1 | /// | /// | /// | |
| 下旬 | 58 | 25 | 5 ) | /// | 8.5 | 12.2 ) | 5.2 ) | 16.7 ) | 2.2 ) | /// | /// | 5.9 | 14 ] | 西 | /// | /// | 35.9 | /// | /// | /// | |
| 上旬 | 73 | 20 | 6 | /// | 3.0 | 5.2 ) | 1.0 ) | 11.1 ) | -2.4 ) | /// | /// | 5.7 | 10 | 西 | /// | /// | 12.8 | /// | /// | /// | |
| 中旬 | 64 | 25 | 6 | /// | 2.2 | 5.5 ) | -0.7 ) | 7.7 ) | -4.2 ) | /// | /// | 6.1 | 11 | 西 | /// | /// | 9.6 | /// | /// | /// | |
| 下旬 | 49 | 12 | 6 | /// | -2.2 | 0.0 | -4.8 | 4.6 | -9.9 | /// | /// | 5.6 | 11 | 西北西 | /// | /// | 12.5 | /// | /// | /// | |
| 上旬 | 24 | 15 | 4 | /// | -2.3 | 0.2 | -5.3 | 3.1 | -14.5 | /// | /// | 3.6 | 12 | 北西 | /// | /// | 22.2 | /// | /// | /// | |
| 中旬 | 38 | 9 | 3 | /// | 0.6 | 3.1 ) | -1.3 ) | 4.6 ) | -6.2 ) | /// | /// | 5.0 | 15 | /// | /// | /// | 16.4 | /// | /// | /// | |
| 下旬 | 19 | 5 | 2 | /// | -0.7 | 2.3 | -3.3 | 5.8 | -6.3 | /// | /// | 5.2 | 12 | 西 | /// | /// | 11.7 | /// | /// | /// | |
- 値欄の記号の説明
- 2021年3月2日より、アメダスの日照時間は「推計気象分布（日照時間）」から得る推計値となりましたので、日照計による観測値と単純比較できません。詳しくは要素ごとの値の補足説明をご覧ください。