平年値（旬ごとの値）
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増毛（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 | 30.8 | -2.5 | 0.0 | -5.4 | 5.1 | 8.6 | /// | /// |
| 中旬 | 21.8 | -3.6 | -1.0 | -6.7 | 4.5 | 13.7 | /// | /// | |
| 下旬 | 26.9 | -3.7 | -0.9 | -7.1 | 4.4 | 15.8 | /// | /// | |
| 2月 | 上旬 | 19.4 | -3.8 | -1.0 | -7.2 | 4.5 | 18.8 | /// | /// |
| 中旬 | 19.1 | -2.9 | -0.4 | -6.1 | 4.6 | 18.3 | /// | /// | |
| 下旬 | 13.8 | -1.9 | 1.1 | -5.6 | 4.2 | 25.1 | /// | /// | |
| 3月 | 上旬 | 19.0 | -1.3 | 1.6 | -4.8 | 4.2 | 32.0 | /// | /// |
| 中旬 | 17.3 | 0.5 | 3.6 | -2.9 | 4.4 | 39.7 | /// | /// | |
| 下旬 | 11.9 | 2.1 | 5.1 | -1.5 | 3.9 | 55.3 | /// | /// | |
| 4月 | 上旬 | 12.2 | 4.2 | 7.6 | 0.4 | 3.5 | 57.7 | /// | /// |
| 中旬 | 15.3 | 5.9 | 9.9 | 1.9 | 3.4 | 61.2 | /// | /// | |
| 下旬 | 14.6 | 8.0 | 12.3 | 3.5 | 3.3 | 60.5 | /// | /// | |
| 5月 | 上旬 | 23.1 | 9.7 | 14.0 | 5.4 | 3.2 | 63.1 | /// | /// |
| 中旬 | 17.1 | 11.2 | 15.4 | 6.9 | 2.9 | 65.4 | /// | /// | |
| 下旬 | 14.4 | 13.0 | 17.4 | 8.7 | 2.5 | 78.2 | /// | /// | |
| 6月 | 上旬 | 17.9 | 14.0 | 17.9 | 10.2 | 2.1 | 62.1 | /// | /// |
| 中旬 | 17.8 | 15.3 | 18.8 | 11.9 | 1.8 | 54.0 | /// | /// | |
| 下旬 | 18.6 | 16.7 | 20.3 | 13.3 | 1.7 | 60.2 | /// | /// | |
| 7月 | 上旬 | 28.4 | 18.3 | 21.7 | 15.0 | 1.7 | 56.2 | /// | /// |
| 中旬 | 30.2 | 19.3 | 22.8 | 16.0 | 1.6 | 57.4 | /// | /// | |
| 下旬 | 43.7 | 20.9 | 24.4 | 17.7 | 1.7 | 58.8 | /// | /// | |
| 8月 | 上旬 | 38.6 | 21.3 | 24.9 | 17.9 | 1.8 | 59.1 | /// | /// |
| 中旬 | 38.9 | 21.0 | 24.7 | 17.5 | 1.9 | 53.4 | /// | /// | |
| 下旬 | 44.1 | 20.4 | 24.4 | 16.6 | 2.1 | 64.4 | /// | /// | |
| 9月 | 上旬 | 51.3 | 19.5 | 23.6 | 15.5 | 2.3 | 60.0 | /// | /// |
| 中旬 | 46.9 | 17.4 | 21.5 | 13.4 | 2.6 | 54.1 | /// | /// | |
| 下旬 | 45.4 | 15.4 | 19.8 | 11.1 | 2.9 | 55.6 | /// | /// | |
| 10月 | 上旬 | 46.3 | 13.5 | 17.8 | 9.4 | 3.4 | 45.7 | /// | /// |
| 中旬 | 45.0 | 11.5 | 15.5 | 7.5 | 3.9 | 38.7 | /// | /// | |
| 下旬 | 51.0 | 9.8 | 13.4 | 5.9 | 4.2 | 36.9 | /// | /// | |
| 11月 | 上旬 | 48.7 | 7.7 | 11.1 | 4.0 | 4.6 | 23.5 | /// | /// |
| 中旬 | 51.7 | 4.5 | 7.8 | 1.3 | 4.7 | 15.9 | /// | /// | |
| 下旬 | 45.2 | 2.6 | 5.5 | -0.3 | 5.3 | 13.2 | /// | /// | |
| 12月 | 上旬 | 32.7 | 0.4 | 3.1 | -2.3 | 5.6 | 9.0 | /// | /// |
| 中旬 | 33.7 | -1.2 | 1.3 | -4.0 | 5.3 | 8.2 | /// | /// | |
| 下旬 | 31.6 | -1.9 | 0.7 | -4.8 | 5.2 | 11.0 | /// | /// | |