月ごとの値
 |  |
 |  |
 |  |  |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
館山（千葉県) 1981年（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 | ||||||||||||||||||||||||||||
| 220.3 | 71 | 0 | 29 | 1 | 1 | 06 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 06 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 4.3 | 5 | 1 | 4 | 0 | 1 | ||
| 145.3 | 48 | 4 | 18 | 0 | 0 | 26* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.3 | 1 | 6 | 3 | 0 | 0 | |||
| 171.2 | 46 | 7 | 16 | 3 | 3 | 02 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 02 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 6.2 | 2 | 8 | 1 | 0 | 0 | ||
| 212.9 | 55 | 1 | 19 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.2 | 3 | 9 | 0 | 2 | 1 | ||||
| 210.7 | 49 | 6 | 19 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 2 | 15 | 0 | 1 | 0 | ||||
| 109.2 | 25 | 8 | 9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.2 | 0 | 19 | 0 | 1 | 2 | ||||
| 238.4 | 54 | 2 | 20 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.8 | 0 | 7 | 0 | 4 | 1 | ||||
| 215.6 | 52 | 1 | 19 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.4 | 1 | 7 | 0 | 0 | 2 | ||||
| 151.8 | 41 | 5 | 15 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 2 | 15 | 0 | 1 | 0 | ||||
| 170.2 | 49 | 5 | 19 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.7 | 6 | 9 | 0 | 0 | 1 | ||||
| 126.6 | 41 | 8 | 15 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 1 | 14 | 0 | 0 | 0 | ||||
| 190.2 | 63 | 1 | 25 | 0 | 0 | 15* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.5 | 9 | 3 | 2 | 1 | 1 | |||