平年値（旬ごとの値）
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木古内（渡島地方) 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 | 34.5 | -1.7 | 1.4 | -4.8 | 2.2 | 24.8 | /// | /// |
| 中旬 | 26.9 | -2.6 | 0.6 | -6.1 | 2.0 | 27.6 | /// | /// | |
| 下旬 | 36.2 | -2.6 | 0.8 | -6.2 | 2.0 | 33.4 | /// | /// | |
| 2月 | 上旬 | 26.8 | -2.5 | 0.8 | -5.9 | 2.0 | 28.3 | /// | /// |
| 中旬 | 30.0 | -1.9 | 1.5 | -5.5 | 2.2 | 33.5 | /// | /// | |
| 下旬 | 23.0 | -0.8 | 3.0 | -4.8 | 2.1 | 36.0 | /// | /// | |
| 3月 | 上旬 | 30.4 | 0.0 | 3.6 | -3.8 | 2.4 | 44.5 | /// | /// |
| 中旬 | 23.1 | 1.5 | 5.5 | -2.6 | 2.3 | 49.8 | /// | /// | |
| 下旬 | 19.3 | 2.9 | 7.2 | -1.4 | 2.3 | 64.4 | /// | /// | |
| 4月 | 上旬 | 19.4 | 4.9 | 9.5 | 0.3 | 2.3 | 62.7 | /// | /// |
| 中旬 | 27.6 | 6.6 | 11.3 | 1.7 | 2.6 | 66.8 | /// | /// | |
| 下旬 | 29.0 | 8.5 | 13.5 | 3.4 | 2.4 | 65.3 | /// | /// | |
| 5月 | 上旬 | 33.8 | 10.1 | 14.7 | 5.4 | 2.5 | 64.0 | /// | /// |
| 中旬 | 26.1 | 11.2 | 15.6 | 7.1 | 2.5 | 59.8 | /// | /// | |
| 下旬 | 27.5 | 12.8 | 17.2 | 8.8 | 2.2 | 68.2 | /// | /// | |
| 6月 | 上旬 | 23.4 | 13.7 | 17.7 | 10.2 | 2.3 | 55.2 | /// | /// |
| 中旬 | 36.0 | 15.1 | 18.7 | 11.9 | 2.3 | 46.5 | /// | /// | |
| 下旬 | 28.2 | 16.5 | 20.1 | 13.3 | 2.2 | 48.6 | /// | /// | |
| 7月 | 上旬 | 46.3 | 17.8 | 21.1 | 15.1 | 2.2 | 39.4 | /// | /// |
| 中旬 | 35.2 | 19.3 | 22.6 | 16.6 | 2.2 | 39.9 | /// | /// | |
| 下旬 | 48.7 | 21.0 | 24.3 | 18.3 | 2.3 | 44.0 | /// | /// | |
| 8月 | 上旬 | 45.5 | 21.9 | 25.4 | 19.0 | 2.2 | 48.2 | /// | /// |
| 中旬 | 52.7 | 21.7 | 25.0 | 18.8 | 2.5 | 44.2 | /// | /// | |
| 下旬 | 61.7 | 21.3 | 25.1 | 17.7 | 2.4 | 56.8 | /// | /// | |
| 9月 | 上旬 | 52.6 | 20.4 | 24.4 | 16.6 | 2.5 | 51.5 | /// | /// |
| 中旬 | 48.0 | 18.4 | 23.0 | 14.0 | 2.3 | 55.5 | /// | /// | |
| 下旬 | 53.9 | 16.3 | 21.2 | 11.5 | 2.5 | 58.8 | /// | /// | |
| 10月 | 上旬 | 45.3 | 14.3 | 19.1 | 9.5 | 2.3 | 54.0 | /// | /// |
| 中旬 | 32.0 | 11.7 | 17.1 | 6.8 | 2.1 | 58.8 | /// | /// | |
| 下旬 | 32.8 | 10.0 | 14.9 | 5.3 | 2.2 | 52.3 | /// | /// | |
| 11月 | 上旬 | 35.5 | 8.0 | 12.9 | 3.5 | 2.1 | 42.0 | /// | /// |
| 中旬 | 49.1 | 5.4 | 9.8 | 1.4 | 2.1 | 33.5 | /// | /// | |
| 下旬 | 38.8 | 3.3 | 7.2 | -0.3 | 2.0 | 29.4 | /// | /// | |
| 12月 | 上旬 | 36.1 | 1.1 | 4.6 | -2.1 | 2.0 | 28.1 | /// | /// |
| 中旬 | 40.1 | -0.6 | 2.6 | -3.7 | 2.1 | 24.1 | /// | /// | |
| 下旬 | 44.6 | -1.0 | 2.3 | -4.3 | 2.2 | 28.5 | /// | /// | |