平年値（旬ごとの値）
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島原（長崎県) 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 | 2006～ 2020 | 2006～ 2020 | 2006～ 2020 | 2006～ 2020 | 2006～ 2020 | 2006～ 2020 | /// | /// | |
| 資料年数 | 15 | 15 | 15 | 15 | 15 | 15 | 0 | 0 | |
| 1月 | 上旬 | 12.4 | 7.3 | 10.6 | 3.6 | 2.4 | 45.7 | /// | /// |
| 中旬 | 22.4 | 6.7 | 10.0 | 3.0 | 2.6 | 44.1 | /// | /// | |
| 下旬 | 29.5 | 6.9 | 10.4 | 3.4 | 2.7 | 50.3 | /// | /// | |
| 2月 | 上旬 | 38.7 | 7.2 | 10.6 | 3.5 | 2.5 | 48.8 | /// | /// |
| 中旬 | 40.9 | 7.7 | 11.4 | 4.1 | 3.1 | 49.7 | /// | /// | |
| 下旬 | 37.9 | 9.8 | 13.8 | 6.2 | 3.0 | 44.7 | /// | /// | |
| 3月 | 上旬 | 42.4 | 9.9 | 13.7 | 6.3 | 3.1 | 51.6 | /// | /// |
| 中旬 | 49.5 | 11.3 | 15.7 | 6.9 | 3.0 | 63.8 | /// | /// | |
| 下旬 | 50.5 | 12.0 | 16.4 | 8.0 | 2.8 | 70.4 | /// | /// | |
| 4月 | 上旬 | 70.0 | 14.0 | 18.7 | 9.7 | 2.7 | 63.3 | /// | /// |
| 中旬 | 58.1 | 15.5 | 20.2 | 11.4 | 3.0 | 65.3 | /// | /// | |
| 下旬 | 54.8 | 16.5 | 21.4 | 12.2 | 2.5 | 69.9 | /// | /// | |
| 5月 | 上旬 | 65.2 | 18.9 | 23.8 | 14.6 | 2.7 | 70.8 | /// | /// |
| 中旬 | 58.6 | 19.8 | 24.7 | 15.4 | 2.4 | 71.3 | /// | /// | |
| 下旬 | 61.9 | 21.1 | 25.8 | 17.1 | 2.3 | 73.2 | /// | /// | |
| 6月 | 上旬 | 53.0 | 22.1 | 26.4 | 18.6 | 2.2 | 53.3 | /// | /// |
| 中旬 | 199.1 | 23.1 | 27.0 | 20.0 | 2.4 | 44.5 | /// | /// | |
| 下旬 | 223.8 | 24.1 | 27.8 | 21.4 | 2.6 | 31.1 | /// | /// | |
| 7月 | 上旬 | 227.5 | 25.6 | 29.3 | 23.0 | 2.6 | 40.0 | /// | /// |
| 中旬 | 101.6 | 27.2 | 31.5 | 24.1 | 2.5 | 63.0 | /// | /// | |
| 下旬 | 85.9 | 28.1 | 32.7 | 24.8 | 2.1 | 91.9 | /// | /// | |
| 8月 | 上旬 | 37.4 | 29.0 | 33.6 | 25.6 | 2.3 | 83.6 | /// | /// |
| 中旬 | 81.2 | 28.4 | 32.9 | 25.2 | 2.2 | 76.4 | /// | /// | |
| 下旬 | 88.8 | 27.5 | 31.8 | 24.5 | 2.3 | 75.7 | /// | /// | |
| 9月 | 上旬 | 54.4 | 26.2 | 30.4 | 23.2 | 2.7 | 64.3 | /// | /// |
| 中旬 | 70.3 | 25.1 | 29.0 | 22.1 | 2.9 | 58.4 | /// | /// | |
| 下旬 | 49.2 | 23.7 | 27.6 | 20.6 | 3.0 | 57.6 | /// | /// | |
| 10月 | 上旬 | 41.2 | 22.4 | 26.1 | 19.1 | 3.2 | 62.4 | /// | /// |
| 中旬 | 25.5 | 20.3 | 24.0 | 17.0 | 3.1 | 63.9 | /// | /// | |
| 下旬 | 51.7 | 18.5 | 22.1 | 15.2 | 2.9 | 65.7 | /// | /// | |
| 11月 | 上旬 | 25.4 | 16.6 | 20.3 | 13.0 | 2.5 | 56.4 | /// | /// |
| 中旬 | 39.6 | 14.3 | 17.9 | 10.8 | 2.6 | 49.2 | /// | /// | |
| 下旬 | 19.1 | 12.7 | 16.0 | 9.3 | 2.5 | 44.0 | /// | /// | |
| 12月 | 上旬 | 31.6 | 10.2 | 13.6 | 6.6 | 2.4 | 45.9 | /// | /// |
| 中旬 | 20.9 | 8.9 | 12.1 | 5.2 | 2.4 | 42.6 | /// | /// | |
| 下旬 | 26.6 | 8.2 | 11.7 | 4.6 | 2.6 | 47.0 | /// | /// | |