平年値（旬ごとの値）
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焼尻（留萌地方) 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 | 16.6 | -2.7 | -0.6 | -4.7 | 6.8 | 13.3 | /// | /// |
| 中旬 | 16.2 | -3.6 | -1.6 | -5.5 | 6.2 | 18.3 | /// | /// | |
| 下旬 | 15.1 | -3.7 | -1.6 | -5.7 | 6.5 | 23.0 | /// | /// | |
| 2月 | 上旬 | 12.2 | -3.8 | -1.6 | -5.9 | 6.3 | 25.0 | /// | /// |
| 中旬 | 11.7 | -3.2 | -1.2 | -5.3 | 6.4 | 28.3 | /// | /// | |
| 下旬 | 8.3 | -1.9 | 0.3 | -4.1 | 6.4 | 35.3 | /// | /// | |
| 3月 | 上旬 | 11.4 | -1.5 | 0.7 | -3.7 | 6.4 | 43.9 | /// | /// |
| 中旬 | 11.4 | 0.4 | 2.6 | -1.9 | 6.5 | 49.2 | /// | /// | |
| 下旬 | 9.8 | 1.9 | 4.2 | -0.4 | 5.9 | 64.5 | /// | /// | |
| 4月 | 上旬 | 10.5 | 3.8 | 6.4 | 1.4 | 5.3 | 66.7 | /// | /// |
| 中旬 | 15.1 | 5.2 | 8.1 | 2.6 | 5.3 | 69.2 | /// | /// | |
| 下旬 | 11.1 | 6.9 | 9.9 | 4.2 | 5.1 | 66.4 | /// | /// | |
| 5月 | 上旬 | 21.5 | 8.4 | 11.5 | 5.8 | 4.8 | 64.4 | /// | /// |
| 中旬 | 17.5 | 10.0 | 13.2 | 7.4 | 4.5 | 68.4 | /// | /// | |
| 下旬 | 20.3 | 11.8 | 15.0 | 9.1 | 4.2 | 77.0 | /// | /// | |
| 6月 | 上旬 | 18.6 | 13.1 | 16.2 | 10.5 | 3.7 | 61.5 | /// | /// |
| 中旬 | 19.8 | 14.4 | 17.5 | 12.0 | 3.6 | 57.0 | /// | /// | |
| 下旬 | 19.8 | 15.8 | 18.7 | 13.4 | 3.6 | 63.1 | /// | /// | |
| 7月 | 上旬 | 28.4 | 17.5 | 20.4 | 15.2 | 3.3 | 57.4 | /// | /// |
| 中旬 | 33.2 | 18.4 | 21.3 | 16.0 | 3.6 | 57.9 | /// | /// | |
| 下旬 | 47.5 | 20.0 | 22.8 | 17.9 | 3.6 | 60.0 | /// | /// | |
| 8月 | 上旬 | 35.3 | 20.8 | 23.5 | 18.7 | 3.6 | 61.1 | /// | /// |
| 中旬 | 41.9 | 20.8 | 23.6 | 18.6 | 3.5 | 57.7 | /// | /// | |
| 下旬 | 42.3 | 20.4 | 23.2 | 18.1 | 4.1 | 68.6 | /// | /// | |
| 9月 | 上旬 | 45.9 | 19.9 | 22.7 | 17.4 | 4.4 | 69.1 | /// | /// |
| 中旬 | 35.3 | 18.2 | 20.9 | 15.7 | 4.7 | 62.1 | /// | /// | |
| 下旬 | 43.7 | 16.4 | 19.2 | 13.7 | 4.9 | 64.3 | /// | /// | |
| 10月 | 上旬 | 38.9 | 14.5 | 17.2 | 11.9 | 5.6 | 55.8 | /// | /// |
| 中旬 | 36.7 | 12.2 | 14.8 | 9.5 | 6.3 | 47.8 | /// | /// | |
| 下旬 | 41.0 | 10.3 | 12.9 | 7.7 | 6.5 | 45.0 | /// | /// | |
| 11月 | 上旬 | 34.5 | 7.7 | 10.3 | 5.1 | 7.0 | 30.6 | /// | /// |
| 中旬 | 40.6 | 4.6 | 7.2 | 2.0 | 6.9 | 21.9 | /// | /// | |
| 下旬 | 30.9 | 2.4 | 5.0 | 0.0 | 7.2 | 17.7 | /// | /// | |
| 12月 | 上旬 | 23.8 | 0.0 | 2.3 | -2.2 | 7.3 | 13.9 | /// | /// |
| 中旬 | 22.2 | -1.5 | 0.7 | -3.7 | 7.1 | 14.6 | /// | /// | |
| 下旬 | 22.2 | -2.0 | 0.2 | -4.1 | 6.7 | 15.8 | /// | /// | |