３か月ごとの値
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八丈島（東京都) 1980年（３か月ごとの値） 詳細（日照・雪・その他）
| 月 | 日照時間(h) | 全天日射量 (MJ/㎡) | 雪(cm) | 雲量 | 大気現象 | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 合計 | 日照率 | 各階級の日数 | 降雪 | 各階級の日数（降雪） | 最深積雪 | 各階級の日数（最深積雪） | 平均 | 各階級の日数 | 雪日数 | 霧日数 | 雷日数 | ||||||||||||||||||
| 不照 | 日照率 ≧40% | 平均 | 合計 | 日合計の最大 | ≧3cm | ≧5cm | ≧10cm | ≧20cm | ≧50cm | ≧100cm | 値 | 日 | ≧0cm | ≧1cm | ≧5cm | ≧10cm | ≧20cm | ≧50cm | ≧100cm | ＜1.5 | ≧8.5 | ||||||||
| 値 | 日 | ||||||||||||||||||||||||||||
11～1 | 320.1 | 34 | 15 | 41 | 7.0 ] | 0 | 0 | 01/23* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.6 | 1 | 38 | 0 | 0 | 5 | |
12～2 | 367.5 | 39 | 5 | 43 | 7.7 | 0 | 0 | 02/23* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 1 | 27 | 0 | 0 | 5 | |
1～3 | 354.6 | 35 | 10 | 37 | 8.7 | 0 | 0 | 02/23* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.6 | 0 | 33 | 0 | 0 | 6 | |
2～4 | 395.9 | 37 | 12 | 38 | 11.3 | 0 | 0 | 02/23* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.5 | 1 | 32 | 0 | 3 | 3 | |
3～5 | 459.8 | 39 | 18 | 45 | 13.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 3 | 34 | 0 | 5 | 2 | ||
4～6 | 447.9 | 36 | 18 | 40 | 14.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 3 | 44 | 0 | 6 | 2 | ||
5～7 | 462.4 | 36 | 18 | 39 | 15.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.8 | 2 | 49 | 0 | 4 | 7 | ||
6～8 | 445.8 | 35 | 14 | 37 | 15.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.1 | 0 | 50 | 0 | 2 | 18 | ||
7～9 | 490.3 | 40 | 11 | 48 | 15.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.5 | 2 | 41 | 0 | 1 | 18 | ||
8～10 | 513.3 | 45 | 8 | 57 | 14.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 2 | 30 | 0 | 0 | 14 | ||
9～11 | 484.7 | 47 | 8 | 57 | 12.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 4 | 23 | 0 | 0 | 3 | ||
10～12 | 462.1 | 47 | 5 | 56 | 10.1 | 0 | 0 | 12/30* | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12/29* | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 2 | 22 | 2 | 0 | 9 |