月ごとの値
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室蘭（胆振地方) 2017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 | ||||||||||||||||||||||||||||
| 89.4 | 31 | 1 | 10 | 5.8 | 59 | 19 | 19 | 4 | 3 | 2 | 0 | 0 | 0 | 34 | 22 | 31 | 30 | 16 | 14 | 12 | 0 | 0 | 8.1 | 0 | 19 | 25 | 0 | 1 | |
| 91.3 | 31 | 4 | 7 | 8.1 | 40 | 18 | 20 | 5 | 2 | 1 | 0 | 0 | 0 | 29 | 20 | 28 | 28 | 28 | 28 | 13 | 0 | 0 | 8.5 | 0 | 19 | 25 | 0 | 0 | |
| 218.2 | 59 | 3 | 23 | 15.3 | 28 | 15 | 30 | 2 | 1 | 1 | 0 | 0 | 0 | 14 | 30* | 18 | 16 | 11 | 4 | 0 | 0 | 0 | 6.0 | 2 | 6 | 18 | 0 | 1 | |
| 234.0 | 59 | 2 | 21 | 18.6 | 1 | 1 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 01 | 2 | 2 | 0 | 0 | 0 | 0 | 0 | 6.1 | 1 | 8 | 3 | 0 | 0 | |
| 211.1 | 47 | 4 | 17 | 18.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 3 | 14 | 0 | 8 | 0 | |||
| 196.2 | 43 | 4 | 16 | 20.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.7 | 2 | 10 | 0 | 6 | 1 | |||
| 198.1 | 43 | 6 | 17 | 18.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.9 | 3 | 14 | 0 | 6 | 2 | |||
| 116.6 | 27 | 11 | 11 | 13.2 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.8 | 0 | 22 | 0 | 4 | 0 | |||
| 205.1 | 55 | 1 | 18 | 15.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.6 | 6 | 9 | 0 | 1 | 3 | |||
| 150.6 | 44 | 7 | 17 | 9.8 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 2 | 12 | 0 | 0 | 1 | |||
| 74.6 | 25 | 2 | 6 | 5.3 | 6 | 2 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 30* | 9 | 5 | 0 | 0 | 0 | 0 | 0 | 8.0 | 0 | 16 | 14 | 0 | 1 | |
| 81.0 | 29 | 1 | 7 | 5.0 | 51 | 11 | 16* | 7 | 4 | 2 | 0 | 0 | 0 | 15 | 16 | 31 | 24 | 16 | 7 | 0 | 0 | 0 | 8.4 | 0 | 19 | 29 | 0 | 0 | |