平年値（日ごとの値）
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八丈島（東京都) 10月 平年値（日ごとの値） 主な要素
| 要素 | 降水量 (mm) | 平均気温 (℃) | 最高気温 (℃) | 最低気温 (℃) | 日照時間 (時間) | 全天日射量 (MJ/㎡) | 平均雲量 | 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～ 2009 | 1991～ 2009 | 1991～ 2009 | 1991～ 2009 |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 19 | 19 | 19 | 19 |
| 1日 | 14.6 | 22.8 | 25.7 | 20.6 | 3.9 | 11.8 @ | 7.6 @ | --- @ | --- @ |
| 2日 | 15.1 | 22.7 | 25.6 | 20.5 | 3.9 | 11.7 @ | 7.6 @ | --- @ | --- @ |
| 3日 | 15.5 | 22.6 | 25.5 | 20.4 | 3.8 | 11.6 @ | 7.6 @ | --- @ | --- @ |
| 4日 | 16.0 | 22.5 | 25.4 | 20.3 | 3.8 | 11.4 @ | 7.6 @ | --- @ | --- @ |
| 5日 | 16.4 | 22.4 | 25.3 | 20.2 | 3.8 | 11.3 @ | 7.6 @ | --- @ | --- @ |
| 6日 | 16.7 | 22.3 | 25.2 | 20.1 | 3.7 | 11.2 @ | 7.6 @ | --- @ | --- @ |
| 7日 | 16.9 | 22.2 | 25.1 | 20.0 | 3.7 | 11.1 @ | 7.5 @ | --- @ | --- @ |
| 8日 | 17.0 | 22.1 | 25.0 | 19.9 | 3.7 | 11.0 @ | 7.5 @ | --- @ | --- @ |
| 9日 | 17.0 | 22.0 | 24.8 | 19.7 | 3.6 | 10.9 @ | 7.5 @ | --- @ | --- @ |
| 10日 | 16.9 | 21.8 | 24.7 | 19.6 | 3.6 | 10.8 @ | 7.5 @ | --- @ | --- @ |
| 11日 | 16.8 | 21.7 | 24.6 | 19.5 | 3.5 | 10.8 @ | 7.4 @ | --- @ | --- @ |
| 12日 | 16.7 | 21.6 | 24.4 | 19.4 | 3.5 | 10.7 @ | 7.4 @ | --- @ | --- @ |
| 13日 | 16.6 | 21.4 | 24.3 | 19.2 | 3.5 | 10.6 @ | 7.3 @ | --- @ | --- @ |
| 14日 | 16.6 | 21.3 | 24.1 | 19.1 | 3.4 | 10.6 @ | 7.3 @ | --- @ | --- @ |
| 15日 | 16.7 | 21.2 | 23.9 | 18.9 | 3.4 | 10.5 @ | 7.3 @ | --- @ | --- @ |
| 16日 | 16.7 | 21.0 | 23.8 | 18.8 | 3.4 | 10.4 @ | 7.3 @ | --- @ | --- @ |
| 17日 | 16.7 | 20.9 | 23.6 | 18.6 | 3.3 | 10.4 @ | 7.3 @ | --- @ | --- @ |
| 18日 | 16.6 | 20.7 | 23.5 | 18.5 | 3.3 | 10.3 @ | 7.3 @ | --- @ | --- @ |
| 19日 | 16.5 | 20.6 | 23.4 | 18.3 | 3.3 | 10.2 @ | 7.3 @ | --- @ | --- @ |
| 20日 | 16.3 | 20.4 | 23.2 | 18.2 | 3.3 | 10.1 @ | 7.3 @ | --- @ | --- @ |
| 21日 | 15.9 | 20.3 | 23.1 | 18.0 | 3.3 | 10.0 @ | 7.4 @ | --- @ | --- @ |
| 22日 | 15.4 | 20.2 | 23.0 | 17.9 | 3.3 | 9.9 @ | 7.4 @ | --- @ | --- @ |
| 23日 | 14.8 | 20.0 | 22.9 | 17.7 | 3.3 | 9.8 @ | 7.4 @ | --- @ | --- @ |
| 24日 | 14.1 | 19.9 | 22.8 | 17.6 | 3.3 | 9.7 @ | 7.4 @ | --- @ | --- @ |
| 25日 | 13.3 | 19.8 | 22.6 | 17.4 | 3.3 | 9.6 @ | 7.4 @ | --- @ | --- @ |
| 26日 | 12.5 | 19.6 | 22.5 | 17.2 | 3.3 | 9.5 @ | 7.4 @ | --- @ | --- @ |
| 27日 | 11.8 | 19.5 | 22.4 | 17.1 | 3.3 | 9.4 @ | 7.4 @ | --- @ | --- @ |
| 28日 | 11.1 | 19.3 | 22.3 | 16.9 | 3.4 | 9.3 @ | 7.4 @ | --- @ | --- @ |
| 29日 | 10.4 | 19.2 | 22.2 | 16.7 | 3.4 | 9.2 @ | 7.4 @ | --- @ | --- @ |
| 30日 | 9.9 | 19.1 | 22.1 | 16.5 | 3.4 | 9.1 @ | 7.4 @ | --- @ | --- @ |
| 31日 | 9.4 | 18.9 | 22.0 | 16.4 | 3.4 | 9.0 @ | 7.4 @ | --- @ | --- @ |
- 「@」の付いた値は、参考値です。平年差や平年比に利用できません。