平年値（旬ごとの値）
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山口（石狩地方) 平年値（旬ごとの値）
| 要素 | 降水量 (mm) | 平均気温 (℃) | 日最高気温 (℃) | 日最低気温 (℃) | 平均風速 (m/s) | 日照時間 (h) | 降雪の深さ合計 (cm) | 最深積雪 (cm) | |
|---|---|---|---|---|---|---|---|---|---|
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | /// | /// | |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 30 | 0 | 0 | |
| 1月 | 上旬 | 29.1 | -2.9 | 0.2 | -6.8 | 3.1 | 22.3 | /// | /// |
| 中旬 | 26.3 | -4.0 | -0.8 | -8.0 | 2.9 | 26.4 | /// | /// | |
| 下旬 | 29.5 | -4.0 | -0.6 | -8.3 | 3.0 | 30.2 | /// | /// | |
| 2月 | 上旬 | 21.1 | -4.1 | -0.7 | -8.4 | 3.0 | 28.3 | /// | /// |
| 中旬 | 25.5 | -3.2 | 0.1 | -7.4 | 3.1 | 27.9 | /// | /// | |
| 下旬 | 19.9 | -2.4 | 1.4 | -7.2 | 2.9 | 32.4 | /// | /// | |
| 3月 | 上旬 | 22.0 | -1.4 | 2.1 | -5.7 | 3.1 | 40.9 | /// | /// |
| 中旬 | 15.5 | 0.5 | 4.0 | -3.6 | 3.0 | 44.8 | /// | /// | |
| 下旬 | 16.0 | 2.0 | 5.8 | -2.2 | 2.9 | 58.5 | /// | /// | |
| 4月 | 上旬 | 12.7 | 4.3 | 8.7 | -0.2 | 2.9 | 58.2 | /// | /// |
| 中旬 | 17.5 | 6.4 | 11.0 | 1.6 | 3.1 | 62.2 | /// | /// | |
| 下旬 | 16.6 | 8.7 | 14.3 | 3.4 | 3.0 | 60.9 | /// | /// | |
| 5月 | 上旬 | 21.4 | 10.6 | 16.0 | 5.5 | 2.9 | 61.0 | /// | /// |
| 中旬 | 16.9 | 12.0 | 17.5 | 6.8 | 2.8 | 64.4 | /// | /// | |
| 下旬 | 13.6 | 13.8 | 19.5 | 8.7 | 2.4 | 70.0 | /// | /// | |
| 6月 | 上旬 | 13.8 | 15.0 | 20.7 | 10.2 | 2.3 | 58.4 | /// | /// |
| 中旬 | 19.4 | 16.1 | 21.1 | 12.0 | 2.2 | 50.7 | /// | /// | |
| 下旬 | 18.9 | 17.5 | 22.6 | 13.3 | 1.9 | 56.4 | /// | /// | |
| 7月 | 上旬 | 28.8 | 19.0 | 23.9 | 15.0 | 1.9 | 52.3 | /// | /// |
| 中旬 | 31.3 | 20.0 | 24.7 | 16.3 | 1.8 | 51.1 | /// | /// | |
| 下旬 | 26.3 | 21.7 | 26.6 | 17.8 | 1.9 | 58.2 | /// | /// | |
| 8月 | 上旬 | 35.0 | 22.1 | 26.8 | 18.3 | 1.7 | 57.7 | /// | /// |
| 中旬 | 46.2 | 21.8 | 26.5 | 17.8 | 1.8 | 53.4 | /// | /// | |
| 下旬 | 40.9 | 21.0 | 25.8 | 16.6 | 1.8 | 60.0 | /// | /// | |
| 9月 | 上旬 | 46.9 | 20.1 | 24.9 | 15.5 | 2.0 | 55.4 | /// | /// |
| 中旬 | 44.4 | 17.8 | 22.9 | 12.9 | 1.8 | 51.7 | /// | /// | |
| 下旬 | 38.3 | 15.6 | 21.0 | 10.1 | 2.0 | 54.8 | /// | /// | |
| 10月 | 上旬 | 38.0 | 13.5 | 18.8 | 8.2 | 2.0 | 48.6 | /// | /// |
| 中旬 | 27.5 | 11.3 | 16.5 | 5.9 | 2.1 | 48.5 | /// | /// | |
| 下旬 | 36.3 | 9.5 | 14.4 | 4.4 | 2.4 | 45.8 | /// | /// | |
| 11月 | 上旬 | 36.8 | 7.4 | 11.9 | 2.7 | 2.6 | 35.6 | /// | /// |
| 中旬 | 40.5 | 4.3 | 8.4 | 0.2 | 2.6 | 29.9 | /// | /// | |
| 下旬 | 30.1 | 2.3 | 6.1 | -1.4 | 2.9 | 28.8 | /// | /// | |
| 12月 | 上旬 | 30.8 | 0.1 | 3.4 | -3.5 | 2.8 | 26.5 | /// | /// |
| 中旬 | 28.5 | -1.7 | 1.5 | -5.3 | 2.9 | 25.9 | /// | /// | |
| 下旬 | 34.1 | -2.3 | 0.9 | -6.1 | 2.9 | 24.3 | /// | /// | |