平年値（日ごとの値）
 |
 |  |
 |  |  |
 |  |
 |  |  |  |  |
八丈島（東京都) 8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 | 5.7 | 26.3 | 29.3 | 24.2 | 6.2 | 19.0 @ | 7.2 @ | --- @ | --- @ |
| 2日 | 5.7 | 26.3 | 29.4 | 24.3 | 6.3 | 19.1 @ | 7.2 @ | --- @ | --- @ |
| 3日 | 5.7 | 26.3 | 29.5 | 24.3 | 6.3 | 19.0 @ | 7.1 @ | --- @ | --- @ |
| 4日 | 5.6 | 26.4 | 29.5 | 24.3 | 6.3 | 19.0 @ | 7.1 @ | --- @ | --- @ |
| 5日 | 5.5 | 26.4 | 29.5 | 24.3 | 6.3 | 18.9 @ | 7.1 @ | --- @ | --- @ |
| 6日 | 5.4 | 26.4 | 29.6 | 24.3 | 6.2 | 18.9 @ | 7.1 @ | --- @ | --- @ |
| 7日 | 5.2 | 26.5 | 29.6 | 24.4 | 6.2 | 18.8 @ | 7.1 @ | --- @ | --- @ |
| 8日 | 5.0 | 26.5 | 29.6 | 24.4 | 6.1 | 18.7 @ | 7.1 @ | --- @ | --- @ |
| 9日 | 4.8 | 26.5 | 29.6 | 24.4 | 6.1 | 18.6 @ | 7.1 @ | --- @ | --- @ |
| 10日 | 4.7 | 26.5 | 29.7 | 24.4 | 6.1 | 18.5 @ | 7.1 @ | --- @ | --- @ |
| 11日 | 4.6 | 26.6 | 29.7 | 24.5 | 6.0 | 18.4 @ | 7.1 @ | --- @ | --- @ |
| 12日 | 4.5 | 26.6 | 29.7 | 24.5 | 6.0 | 18.3 @ | 7.1 @ | --- @ | --- @ |
| 13日 | 4.4 | 26.6 | 29.7 | 24.5 | 6.0 | 18.2 @ | 7.1 @ | --- @ | --- @ |
| 14日 | 4.5 | 26.6 | 29.7 | 24.5 | 5.9 | 18.0 @ | 7.1 @ | --- @ | --- @ |
| 15日 | 4.6 | 26.6 | 29.7 | 24.5 | 5.9 | 17.9 @ | 7.1 @ | --- @ | --- @ |
| 16日 | 4.7 | 26.6 | 29.7 | 24.5 | 5.9 | 17.8 @ | 7.1 @ | --- @ | --- @ |
| 17日 | 4.9 | 26.6 | 29.7 | 24.5 | 5.9 | 17.7 @ | 7.1 @ | --- @ | --- @ |
| 18日 | 5.1 | 26.5 | 29.6 | 24.5 | 5.9 | 17.5 @ | 7.1 @ | --- @ | --- @ |
| 19日 | 5.4 | 26.5 | 29.6 | 24.4 | 5.9 | 17.4 @ | 7.0 @ | --- @ | --- @ |
| 20日 | 5.6 | 26.5 | 29.6 | 24.4 | 5.9 | 17.3 @ | 7.0 @ | --- @ | --- @ |
| 21日 | 5.8 | 26.4 | 29.6 | 24.3 | 5.9 | 17.2 @ | 7.0 @ | --- @ | --- @ |
| 22日 | 6.0 | 26.4 | 29.5 | 24.2 | 5.9 | 17.0 @ | 6.9 @ | --- @ | --- @ |
| 23日 | 6.2 | 26.3 | 29.5 | 24.1 | 5.9 | 16.9 @ | 6.9 @ | --- @ | --- @ |
| 24日 | 6.4 | 26.3 | 29.5 | 24.1 | 5.9 | 16.8 @ | 6.9 @ | --- @ | --- @ |
| 25日 | 6.5 | 26.2 | 29.4 | 24.0 | 5.8 | 16.7 @ | 6.9 @ | --- @ | --- @ |
| 26日 | 6.7 | 26.2 | 29.4 | 24.0 | 5.8 | 16.6 @ | 6.9 @ | --- @ | --- @ |
| 27日 | 7.0 | 26.2 | 29.3 | 23.9 | 5.7 | 16.5 @ | 6.9 @ | --- @ | --- @ |
| 28日 | 7.3 | 26.1 | 29.3 | 23.9 | 5.7 | 16.4 @ | 6.9 @ | --- @ | --- @ |
| 29日 | 7.7 | 26.1 | 29.3 | 23.8 | 5.6 | 16.3 @ | 7.0 @ | --- @ | --- @ |
| 30日 | 8.2 | 26.0 | 29.2 | 23.8 | 5.6 | 16.2 @ | 7.0 @ | --- @ | --- @ |
| 31日 | 8.7 | 26.0 | 29.2 | 23.7 | 5.5 | 16.1 @ | 7.1 @ | --- @ | --- @ |
- 「@」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。