平年値（旬ごとの値）
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本山（高知県) 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 | 16.0 | 3.6 | 9.7 | -0.8 | 1.1 | 48.3 | /// | /// |
| 中旬 | 23.1 | 3.2 | 9.2 | -1.2 | 1.1 | 48.7 | /// | /// | |
| 下旬 | 28.5 | 3.1 | 8.9 | -1.3 | 1.2 | 53.4 | /// | /// | |
| 2月 | 上旬 | 21.5 | 3.2 | 9.4 | -1.4 | 1.2 | 51.3 | /// | /// |
| 中旬 | 39.6 | 4.2 | 10.4 | -0.4 | 1.2 | 50.6 | /// | /// | |
| 下旬 | 40.9 | 5.4 | 12.0 | 0.4 | 1.2 | 43.5 | /// | /// | |
| 3月 | 上旬 | 50.6 | 6.5 | 13.0 | 1.4 | 1.2 | 51.7 | /// | /// |
| 中旬 | 59.1 | 7.6 | 14.2 | 2.1 | 1.3 | 54.3 | /// | /// | |
| 下旬 | 63.8 | 8.9 | 15.6 | 3.4 | 1.2 | 59.4 | /// | /// | |
| 4月 | 上旬 | 61.0 | 11.1 | 18.2 | 5.2 | 1.2 | 59.3 | /// | /// |
| 中旬 | 75.4 | 12.7 | 19.9 | 6.8 | 1.2 | 60.8 | /// | /// | |
| 下旬 | 61.5 | 14.2 | 21.5 | 8.2 | 1.1 | 64.0 | /// | /// | |
| 5月 | 上旬 | 69.2 | 16.4 | 23.5 | 10.8 | 1.0 | 60.1 | /// | /// |
| 中旬 | 92.8 | 17.1 | 24.1 | 11.6 | 1.0 | 61.7 | /// | /// | |
| 下旬 | 80.4 | 18.4 | 25.4 | 13.1 | 0.9 | 66.9 | /// | /// | |
| 6月 | 上旬 | 68.9 | 19.6 | 25.9 | 15.2 | 0.9 | 49.4 | /// | /// |
| 中旬 | 114.2 | 21.1 | 26.7 | 17.2 | 0.8 | 43.0 | /// | /// | |
| 下旬 | 169.5 | 22.3 | 27.4 | 19.0 | 0.7 | 31.1 | /// | /// | |
| 7月 | 上旬 | 179.6 | 23.8 | 29.1 | 20.5 | 0.7 | 38.0 | /// | /// |
| 中旬 | 104.6 | 24.9 | 30.8 | 21.2 | 0.8 | 46.4 | /// | /// | |
| 下旬 | 168.4 | 25.6 | 31.8 | 21.7 | 0.9 | 62.3 | /// | /// | |
| 8月 | 上旬 | 186.5 | 25.7 | 32.0 | 22.0 | 0.8 | 55.3 | /// | /// |
| 中旬 | 125.8 | 25.4 | 31.6 | 21.7 | 0.8 | 52.1 | /// | /// | |
| 下旬 | 97.8 | 24.6 | 30.8 | 21.0 | 0.7 | 53.1 | /// | /// | |
| 9月 | 上旬 | 148.9 | 23.6 | 29.5 | 19.9 | 0.8 | 43.4 | /// | /// |
| 中旬 | 148.7 | 22.1 | 28.0 | 18.4 | 0.8 | 42.4 | /// | /// | |
| 下旬 | 129.3 | 20.0 | 25.9 | 16.1 | 0.8 | 39.6 | /// | /// | |
| 10月 | 上旬 | 77.0 | 18.4 | 24.5 | 14.4 | 0.8 | 43.2 | /// | /// |
| 中旬 | 80.0 | 16.4 | 23.1 | 12.0 | 0.8 | 50.3 | /// | /// | |
| 下旬 | 69.5 | 14.1 | 20.6 | 9.9 | 0.8 | 53.1 | /// | /// | |
| 11月 | 上旬 | 46.6 | 12.5 | 19.0 | 8.2 | 0.8 | 46.1 | /// | /// |
| 中旬 | 50.0 | 10.5 | 16.6 | 6.3 | 0.8 | 43.7 | /// | /// | |
| 下旬 | 35.6 | 8.5 | 14.6 | 4.4 | 0.9 | 43.4 | /// | /// | |
| 12月 | 上旬 | 41.1 | 6.6 | 12.7 | 2.5 | 1.0 | 43.7 | /// | /// |
| 中旬 | 26.0 | 5.1 | 10.8 | 1.0 | 1.0 | 42.5 | /// | /// | |
| 下旬 | 28.6 | 4.3 | 10.3 | 0.2 | 1.1 | 49.7 | /// | /// | |