月ごとの値
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室蘭（胆振地方) 1974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 | ||||||||||||||||||||||||||||
| 163.9 | 56 | 0 | 23 | 6.6 | 22 | 8 | 17 | 3 | 1 | 0 | 0 | 0 | 0 | 8 | 17 | 25 | 22 | 10 | 0 | 0 | 0 | 0 | 6.3 | 1 | 8 | 26 | 0 | 1 | |
| 136.4 | 46 | 2 | 16 | 8.4 | 27 | 13 | 28 | 3 | 1 | 1 | 0 | 0 | 0 | 10 | 28 | 19 | 18 | 7 | 1 | 0 | 0 | 0 | 7.2 | 2 | 11 | 26 | 0 | 0 | |
| 220.0 | 60 | 1 | 24 | 13.6 | 13 | 6 | 22* | 2 | 2 | 0 | 0 | 0 | 0 | 6 | 01 | 11 | 8 | 2 | 0 | 0 | 0 | 0 | 6.4 | 4 | 11 | 19 | 0 | 0 | |
| 177.4 | 44 | 5 | 17 | 13.8 | 5 | 5 | 02 | 1 | 1 | 0 | 0 | 0 | 0 | 5 | 02 | 2 | 1 | 1 | 0 | 0 | 0 | 0 | 6.9 | 1 | 12 | 4 | 2 | 1 | |
| 240.2 | 53 | 5 | 22 | 18.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.0 | 5 | 11 | 0 | 4 | 0 | |||
| 143.8 | 32 | 11 | 12 | 14.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.5 | 0 | 17 | 0 | 18 | 1 | |||
| 163.2 | 35 | 9 | 14 | 16.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 1 | 19 | 0 | 10 | 0 | |||
| 163.6 | 38 | 7 | 12 | 14.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 4 | 15 | 0 | 4 | 1 | |||
| 167.5 | 45 | 4 | 13 | 12.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.0 | 4 | 9 | 0 | 1 | 4 | |||
| 150.4 | 44 | 4 | 15 | 9.2 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.3 | 2 | 10 | 1 | 0 | 0 | |||
| 116.6 | 40 | 4 | 15 | 6.0 | 12 | 7 | 14 | 1 | 1 | 0 | 0 | 0 | 0 | 7 | 14 | 11 | 8 | 2 | 0 | 0 | 0 | 0 | 7.4 | 1 | 10 | 11 | 0 | 1 | |
| 52.8 | 19 | 7 | 3 | 3.7 | 45 | 22 | 14 | 3 | 3 | 1 | 1 | 0 | 0 | 20 | 20* | 29 | 27 | 18 | 13 | 2 | 0 | 0 | 8.6 | 1 | 21 | 30 | 0 | 1 | |