３か月ごとの値
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八丈島（東京都) 1994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 | 275.6 | 29 | 14 | 29 | 7.0 | 0 | 0 | 01/29* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 1 | 38 | 0 | 0 | 8 | |
12～2 | 236.0 | 25 | 10 | 23 | 6.9 | 0 | 0 | 02/22* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 0 | 37 | 0 | 0 | 11 | |
1～3 | 281.8 | 28 | 13 | 28 | 8.6 | 0 | 0 | 03/06* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.5 | 1 | 38 | 0 | 0 | 12 | |
2～4 | 333.1 | 31 | 11 | 32 | 10.9 | 0 | 0 | 04/16* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.4 | 4 | 39 | 0 | 0 | 9 | |
3～5 | 418.7 | 35 | 16 | 40 | 13.2 | 0 | 0 | 04/16* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 5 | 43 | 0 | 2 | 6 | |
4～6 | 394.1 | 32 | 13 | 33 | 13.9 | 0 | 0 | 04/16 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.8 | 4 | 50 | 0 | 2 | 5 | |
5～7 | 421.8 | 33 | 13 | 37 | 14.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.9 | 1 | 50 | 0 | 2 | 4 | ||
6～8 | 495.7 | 39 | 7 | 43 | 16.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 2 | 43 | 0 | 0 | 9 | ||
7～9 | 540.2 | 44 | 4 | 47 | 16.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.9 | 3 | 36 | 0 | 0 | 12 | ||
8～10 | 467.9 | 41 | 10 | 41 | 13.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 3 | 37 | 0 | 0 | 14 | ||
9～11 | 335.9 | 32 | 13 | 31 | 9.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.4 | 2 | 39 | 0 | 0 | 13 | ||
10～12 | 282.6 | 29 | 18 | 30 | 7.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 1 | 36 | 0 | 0 | 8 | ||