月ごとの値
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室蘭（胆振地方) 2009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 | ||||||||||||||||||||||||||||
| 110.6 | 38 | 5 | 18 | 6.2 | 64 | 28 | 10 | 8 | 2 | 1 | 1 | 0 | 0 | 28 | 10 | 26 | 21 | 13 | 10 | 6 | 0 | 0 | 8.0 | 0 | 14 | 27 | 0 | 0 | |
| 119.3 | 41 | 4 | 15 | 8.7 | 43 | 12 | 22 | 5 | 4 | 2 | 0 | 0 | 0 | 18 | 22 | 20 | 15 | 9 | 4 | 0 | 0 | 0 | 7.1 | 0 | 9 | 25 | 0 | 0 | |
| 188.1 | 51 | 3 | 19 | 13.5 | 6 | 2 | 03* | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 03* | 14 | 6 | 3 | 0 | 0 | 0 | 0 | 6.4 | 3 | 11 | 22 | 1 | 0 | |
| 241.3 | 61 | 2 | 22 | 18.8 | 16 | 15 | 26 | 1 | 1 | 1 | 0 | 0 | 0 | 13 | 26 | 2 | 2 | 2 | 1 | 0 | 0 | 0 | 5.7 | 5 | 11 | 2 | 2 | 0 | |
| 224.1 | 50 | 7 | 18 | 19.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.8 | 3 | 13 | 0 | 1 | 0 | |||
| 130.1 | 29 | 10 | 11 | 15.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.3 | 1 | 19 | 0 | 8 | 0 | |||
| 117.0 | 25 | 10 | 10 | 14.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.8 | 0 | 20 | 0 | 12 | 1 | |||
| 121.2 | 28 | 8 | 11 | 14.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.6 | 1 | 19 | 0 | 7 | 0 | |||
| 185.0 ) | 49 ) | 4 | 18 ) | 14.6 ) | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.7 | 3 | 10 | 0 | 5 | 1 | |||
| 168.6 | 49 | 4 | 19 | 10.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.1 | 2 | 6 | 0 | 0 | 3 | |||
| 77.9 | 27 | 8 | 7 | 5.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 21* | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 7.8 | 2 | 17 | 10 | 2 | 1 | ||
| 77.9 | 28 | 4 | 5 | 4.5 | 34 | 8 | 30 | 6 | 2 | 0 | 0 | 0 | 0 | 9 | 30 | 20 | 12 | 8 | 0 | 0 | 0 | 0 | 8.0 | 1 | 16 | 23 | 0 | 0 | |