平年値（日ごとの値）
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留萌（留萌地方) 4月 平年値（日ごとの値） 主な要素
| 要素 | 降水量 (mm) | 平均気温 (℃) | 最高気温 (℃) | 最低気温 (℃) | 日照時間 (時間) | 全天日射量 (MJ/㎡) | 平均雲量 | 降雪の深さ合計 (cm) | 最深積雪 (cm) |
|---|---|---|---|---|---|---|---|---|---|
| 統計期間 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2020 | 1991～ 2008 | 1991～ 2008 | 1991～ 2020 | 1991～ 2020 |
| 資料年数 | 30 | 30 | 30 | 30 | 30 | 18 | 18 | 30 | 30 |
| 1日 | 1.3 | 2.9 | 6.2 | -0.8 | 5.5 | 14.3 @ | 7.5 @ | 1 | 17 |
| 2日 | 1.3 | 3.0 | 6.4 | -0.6 | 5.6 | 14.5 @ | 7.5 @ | 1 | 15 |
| 3日 | 1.3 | 3.2 | 6.6 | -0.4 | 5.6 | 14.7 @ | 7.4 @ | 1 | 13 |
| 4日 | 1.3 | 3.4 | 6.9 | -0.3 | 5.6 | 14.9 @ | 7.3 @ | 1 | 12 |
| 5日 | 1.3 | 3.6 | 7.1 | -0.1 | 5.7 | 15.1 @ | 7.2 @ | 1 | 10 |
| 6日 | 1.3 | 3.7 | 7.3 | 0.0 | 5.7 | 15.2 @ | 7.2 @ | 1 | 9 |
| 7日 | 1.3 | 3.9 | 7.5 | 0.2 | 5.7 | 15.4 @ | 7.1 @ | 1 | 7 |
| 8日 | 1.3 | 4.1 | 7.7 | 0.4 | 5.8 | 15.4 @ | 7.1 @ | 0 | 6 |
| 9日 | 1.3 | 4.3 | 7.9 | 0.5 | 5.8 | 15.5 @ | 7.1 @ | 0 | 5 |
| 10日 | 1.3 | 4.4 | 8.2 | 0.7 | 5.8 | 15.6 @ | 7.1 @ | 0 | 4 |
| 11日 | 1.3 | 4.6 | 8.4 | 0.9 | 5.8 | 15.6 @ | 7.1 @ | 0 | 4 |
| 12日 | 1.3 | 4.8 | 8.6 | 1.0 | 5.9 | 15.7 @ | 7.1 @ | 0 | 3 |
| 13日 | 1.3 | 5.0 | 8.8 | 1.2 | 5.9 | 15.7 @ | 7.2 @ | 0 | 2 |
| 14日 | 1.4 | 5.2 | 9.1 | 1.4 | 5.9 | 15.7 @ | 7.2 @ | --- | 2 |
| 15日 | 1.4 | 5.3 | 9.3 | 1.5 | 5.9 | 15.7 @ | 7.2 @ | --- | 2 |
| 16日 | 1.4 | 5.5 | 9.5 | 1.7 | 5.9 | 15.8 @ | 7.2 @ | 0 | 1 |
| 17日 | 1.5 | 5.7 | 9.8 | 1.9 | 5.9 | 15.8 @ | 7.3 @ | 0 | 1 |
| 18日 | 1.5 | 5.9 | 10.0 | 2.0 | 5.9 | 15.8 @ | 7.3 @ | 0 | 1 |
| 19日 | 1.5 | 6.1 | 10.2 | 2.2 | 5.9 | 15.9 @ | 7.3 @ | 0 | 1 |
| 20日 | 1.6 | 6.3 | 10.5 | 2.3 | 5.8 | 15.9 @ | 7.3 @ | 0 | --- |
| 21日 | 1.6 | 6.5 | 10.7 | 2.5 | 5.8 | 15.9 @ | 7.3 @ | 0 | --- |
| 22日 | 1.6 | 6.7 | 11.0 | 2.6 | 5.8 | 16.0 @ | 7.2 @ | --- | --- |
| 23日 | 1.6 | 6.9 | 11.2 | 2.8 | 5.9 | 16.1 @ | 7.2 @ | --- | --- |
| 24日 | 1.6 | 7.1 | 11.4 | 3.0 | 5.9 | 16.1 @ | 7.2 @ | --- | --- |
| 25日 | 1.7 | 7.3 | 11.7 | 3.1 | 5.9 | 16.2 @ | 7.2 @ | 0 | 0 |
| 26日 | 1.7 | 7.5 | 11.9 | 3.3 | 5.9 | 16.3 @ | 7.2 @ | --- | --- |
| 27日 | 1.7 | 7.8 | 12.1 | 3.5 | 5.9 | 16.4 @ | 7.2 @ | --- | --- |
| 28日 | 1.8 | 8.0 | 12.3 | 3.7 | 5.9 | 16.5 @ | 7.2 @ | --- | --- |
| 29日 | 1.8 | 8.2 | 12.5 | 3.9 | 5.9 | 16.6 @ | 7.2 @ | --- | --- |
| 30日 | 1.9 | 8.3 | 12.7 | 4.1 | 5.9 | 16.8 @ | 7.2 @ | --- | --- |
- 「@」の付いた値は、参考値です。平年差や平年比に利用できません。