旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
留萌（留萌地方) 1987年（旬ごとの値） 詳細（日照・雪・その他）
| 月 | 旬 | 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 | |||||||||||||||||||||||||||||
| 上旬 | 7.8 | 9 | 2 | 0 | 3.2 | 93 | 32 | 06 | 7 | 7 | 5 | 1 | 0 | 0 | 62 | 06 | 10 | 10 | 10 | 10 | 10 | 5 | 0 | 9.4 | 0 | 8 | 10 | 0 | 0 | |
| 中旬 | 13.1 | 14 | 3 | 2 | 3.9 | 28 | 9 | 19 | 4 | 3 | 0 | 0 | 0 | 0 | 58 | 11 | 10 | 10 | 10 | 10 | 10 | 8 | 0 | 8.8 | 0 | 7 | 10 | 0 | 0 | |
| 下旬 | 18.0 | 17 | 3 | 2 | 4.5 | 80 | 37 | 31 | 7 | 3 | 2 | 2 | 0 | 0 | 94 | 31 | 11 | 11 | 11 | 11 | 11 | 8 | 0 | 9.2 | 0 | 9 | 10 | 0 | 1 | |
| 上旬 | 40.8 | 41 | 1 | 5 | 7.4 | 19 | 18 | 01 | 1 | 1 | 1 | 0 | 0 | 0 | 99 | 01 | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 7.3 | 0 | 5 | 8 | 0 | 0 | |
| 中旬 | 17.0 | 16 | 0 | 1 | 6.1 | 30 | 11 | 20 | 4 | 3 | 1 | 0 | 0 | 0 | 76 | 20 | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 9.1 | 0 | 8 | 9 | 0 | 0 | |
| 下旬 | 18.5 | 21 | 1 | 2 | 7.8 | 18 | 13 | 25 | 1 | 1 | 1 | 0 | 0 | 0 | 84 | 25 | 8 | 8 | 8 | 8 | 8 | 8 | 0 | 9.1 | 0 | 6 | 8 | 0 | 0 | |
| 上旬 | 28.0 | 25 | 1 | 3 | 8.9 | 32 | 13 | 02 | 4 | 2 | 2 | 0 | 0 | 0 | 85 | 03* | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 9.2 | 0 | 9 | 10 | 0 | 0 | |
| 中旬 | 26.3 | 22 | 2 | 3 | 9.5 | 7 | 5 | 12 | 1 | 1 | 0 | 0 | 0 | 0 | 82 | 12 | 10 | 10 | 10 | 10 | 10 | 10 | 0 | 9.1 | 0 | 7 | 8 | 0 | 0 | |
| 下旬 | 36.7 | 27 | 2 | 3 | 10.6 | 23 | 9 | 25 | 3 | 2 | 0 | 0 | 0 | 0 | 67 | 26 | 11 | 11 | 11 | 11 | 11 | 10 | 0 | 8.7 | 0 | 7 | 9 | 1 | 0 | |
| 上旬 | 44.2 | 34 | 2 | 4 | 13.1 | 2 | 2 | 03 | 0 | 0 | 0 | 0 | 0 | 0 | 50 | 01 | 10 | 9 | 8 | 7 | 6 | 1 | 0 | 7.0 | 1 | 3 | 3 | 0 | 0 | |
| 中旬 | 63.1 | 47 | 1 | 6 | 15.8 | 5 | 3 | 13 | 1 | 0 | 0 | 0 | 0 | 0 | 5 | 13 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 7.0 | 0 | 5 | 4 | 0 | 0 | |
| 下旬 | 47.2 | 34 | 2 | 4 | 13.4 | 0 | 0 | 26* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.5 | 0 | 4 | 2 | 0 | 0 | ||
| 上旬 | 65.4 | 46 | 1 | 5 | 15.8 | 0 | 0 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.2 | 4 | 3 | 1 | 1 | 0 | ||
| 中旬 | 87.0 | 59 | 0 | 7 | 20.1 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.9 | 2 | 3 | 0 | 0 | 1 | |||
| 下旬 | 52.1 | 32 | 2 | 4 | 15.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.6 | 0 | 5 | 0 | 3 | 0 | |||
| 上旬 | 65.3 | 43 | 1 | 6 | 18.2 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 0 | 5 | 0 | 3 | 0 | |||
| 中旬 | 73.2 | 48 | 1 | 6 | 18.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.0 | 1 | 2 | 0 | 3 | 1 | |||
| 下旬 | 89.6 | 58 | 1 | 8 | 21.8 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.4 | 0 | 2 | 0 | 0 | 0 | |||
| 上旬 | 61.6 | 40 | 1 | 6 | 18.8 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 0 | 4 | 0 | 0 | 0 | |||
| 中旬 | 29.1 | 19 | 2 | 2 | 13.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.1 | 0 | 7 | 0 | 1 | 0 | |||
| 下旬 | 40.2 | 25 | 3 | 2 | 13.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.3 | 0 | 8 | 0 | 1 | 0 | |||
| 上旬 | 36.8 | 26 | 4 | 3 | 13.3 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.6 | 0 | 7 | 0 | 0 | 0 | |||
| 中旬 | 36.0 | 26 | 1 | 2 | 13.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.0 | 0 | 5 | 0 | 3 | 0 | |||
| 下旬 | 28.6 | 19 | 3 | 1 | 10.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.3 | 0 | 9 | 0 | 0 | 2 | |||
| 上旬 | 46.7 | 36 | 2 | 3 | 12.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.1 | 2 | 6 | 0 | 0 | 2 | |||
| 中旬 | 53.7 | 43 | 1 | 6 | 12.7 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.8 | 1 | 5 | 0 | 1 | 0 | |||
| 下旬 | 59.1 | 49 | 2 | 6 | 11.4 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.8 | 1 | 2 | 0 | 0 | 1 | |||
| 上旬 | 66.9 | 58 | 0 | 8 | 11.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.5 | 1 | 2 | 0 | 0 | 1 | |||
| 中旬 | 43.6 | 40 | 2 | 5 | 8.4 | 0 | 0 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 0 | 5 | 0 | 0 | 1 | ||
| 下旬 | 37.8 | 33 | 0 | 4 | 6.9 | 0 | 0 | 24* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 0 | 6 | 2 | 0 | 1 | ||
| 上旬 | 19.0 | 19 | 3 | 1 | 4.9 | 0 | 0 | 09* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.1 | 0 | 8 | 0 | 0 | 0 | ||
| 中旬 | 20.7 | 22 | 1 | 2 | 4.5 | 2 | 2 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 20 | 3 | 2 | 1 | 0 | 0 | 0 | 0 | 8.3 | 0 | 6 | 3 | 0 | 0 | |
| 下旬 | 2.9 | 3 | 4 | 0 | 2.6 | 67 | 42 | 30 | 3 | 3 | 2 | 1 | 0 | 0 | 53 | 30 | 10 | 10 | 6 | 3 | 1 | 1 | 0 | 9.8 | 0 | 10 | 10 | 0 | 0 | |
| 上旬 | 19.3 | 21 | 4 | 2 | 3.9 | 61 | 22 | 01 | 5 | 5 | 2 | 1 | 0 | 0 | 67 | 01 | 10 | 10 | 10 | 10 | 10 | 4 | 0 | 8.8 | 0 | 6 | 8 | 0 | 0 | |
| 中旬 | 7.4 | 8 | 3 | 0 | 2.9 | 14 | 8 | 19 | 2 | 1 | 0 | 0 | 0 | 0 | 28 | 20 | 10 | 10 | 10 | 10 | 6 | 0 | 0 | 9.7 | 0 | 10 | 10 | 0 | 1 | |
| 下旬 | 7.3 | 8 | 3 | 0 | 3.0 | 39 | 24 | 21 | 3 | 3 | 1 | 1 | 0 | 0 | 45 | 21 | 11 | 11 | 11 | 11 | 9 | 0 | 0 | 9.6 | 0 | 10 | 8 | 0 | 0 | |