月ごとの値
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室蘭（胆振地方) 1990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 | ||||||||||||||||||||||||||||
| 81.1 | 28 | 5 | 8 | 5.3 | 70 | 25 | 27 | 8 | 4 | 1 | 1 | 0 | 0 | 34 | 27 | 31 | 31 | 22 | 18 | 5 | 0 | 0 | 7.6 | 0 | 15 | 30 | 0 | 0 | |
| 111.3 | 38 | 4 | 12 | 8.1 | 3 | 1 | 20* | 0 | 0 | 0 | 0 | 0 | 0 | 22 | 01 | 21 | 17 | 12 | 11 | 2 | 0 | 0 | 7.6 | 0 | 11 | 24 | 0 | 0 | |
| 211.3 | 57 | 4 | 22 | 14.0 | 0 | 0 | 26* | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 4.9 | 8 | 5 | 11 | 0 | 0 | |
| 191.4 | 48 | 6 | 20 | 15.9 | 5 | 5 | 15 | 1 | 1 | 0 | 0 | 0 | 0 | 6 | 15 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 6.3 | 4 | 9 | 7 | 4 | 0 | |
| 237.8 | 53 | 5 | 19 | 20.5 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 2 | 10 | 0 | 7 | 0 | |||
| 198.6 | 44 | 6 | 17 | 19.8 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 0 | 13 | 0 | 6 | 1 | |||
| 130.6 | 28 | 9 | 11 | 16.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.4 | 0 | 20 | 0 | 4 | 3 | |||
| 154.0 | 36 | 5 | 13 | 15.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.6 | 3 | 17 | 0 | 5 | 4 | |||
| 150.9 | 40 | 6 | 15 | 12.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 2 | 12 | 0 | 1 | 1 | |||
| 196.6 | 57 | 2 | 21 | 11.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.0 | 8 | 7 | 0 | 0 | 2 | |||
| 105.8 | 36 | 3 | 12 | 6.3 | 1 | 1 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 10 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 7.0 | 2 | 12 | 4 | 0 | 0 | |
| 69.3 | 25 | 4 | 6 | 4.3 | 8 | 3 | 28 | 1 | 0 | 0 | 0 | 0 | 0 | 6 | 30 | 15 | 8 | 1 | 0 | 0 | 0 | 0 | 8.1 | 0 | 16 | 15 | 0 | 0 | |