３か月ごとの値
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留萌（留萌地方) 1990年（３か月ごとの値） 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 | ||||||||||||||||||||||||||||
11～1 | 173.9 | 20 | 20 | 19 | 4.1 | 327 | 51 | 12/19 | 29 | 22 | 11 | 4 | 1 | 0 | 67 | 01/31 | 65 | 62 | 58 | 57 | 47 | 13 | 0 | 8.9 | 1 | 71 | 65 | 0 | 1 |
12～2 | 182.5 | 21 | 18 | 20 | 5.0 | 395 | 51 | 12/19 | 36 | 26 | 13 | 5 | 1 | 0 | 86 | 02/01 | 89 | 87 | 84 | 84 | 75 | 33 | 0 | 8.8 | 1 | 67 | 77 | 0 | 0 |
1～3 | 341.5 | 36 | 13 | 35 | 8.5 | 311 | 32 | 01/12 | 33 | 22 | 10 | 4 | 0 | 0 | 86 | 02/01 | 81 | 80 | 77 | 75 | 71 | 32 | 0 | 8.0 | 2 | 54 | 66 | 0 | 1 |
2～4 | 486.7 | 46 | 9 | 46 | 12.6 | 114 | 31 | 02/01 | 14 | 8 | 3 | 1 | 0 | 0 | 86 | 02/01 | 53 | 50 | 46 | 44 | 41 | 20 | 0 | 7.3 | 6 | 43 | 40 | 1 | 1 |
3～5 | 610.5 | 50 | 9 | 54 | 16.0 | 28 | 8 | 03/06 | 5 | 2 | 0 | 0 | 0 | 0 | 40 | 03/01 | 25 | 22 | 18 | 16 | 13 | 0 | 0 | 6.8 | 6 | 38 | 18 | 3 | 3 |
4～6 | 569.7 | 43 | 14 | 48 | 17.3 | 1 | 1 | 04/04 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 04/04 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 7.3 | 4 | 45 | 3 | 7 | 5 |
5～7 | 592.7 | 43 | 13 | 50 | 18.6 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.3 | 2 | 44 | 0 | 9 | 7 | ||
6～8 | 569.5 | 42 | 12 | 50 | 17.9 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.5 | 2 | 47 | 0 | 9 | 7 | ||
7～9 | 552.9 | 43 | 7 | 48 | 16.0 | -- | -- | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.4 | 2 | 45 | 0 | 6 | 9 | ||
8～10 | 487.9 | 42 | 8 | 47 | 12.3 | 0 | 0 | 10/20* | 0 | 0 | 0 | 0 | 0 | 0 | -- | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.1 | 3 | 42 | 0 | 5 | 9 | |
9～11 | 394.6 | 39 | 9 | 39 | 8.9 | 2 | 1 | 11/22* | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 11/22 | 4 | 4 | 0 | 0 | 0 | 0 | 0 | 7.2 | 4 | 44 | 7 | 4 | 11 |
10～12 | 284.2 | 31 | 13 | 30 | 5.8 | 51 | 10 | 12/29 | 7 | 5 | 1 | 0 | 0 | 0 | 27 | 12/30 | 27 | 24 | 14 | 9 | 4 | 0 | 0 | 7.8 | 4 | 54 | 29 | 3 | 8 |