旬ごとの値
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初山別（留萌地方) 1987年（旬ごとの値） 詳細（気温・蒸気圧・湿度）
| 月 | 旬 | 気温 | 蒸気圧 | 湿度 | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 平均 | 最高 | 最低 | 積算 (℃) |
各階級の日数（平均） | 各階級の日数（最低） | 各階級の日数（最高） | 平均 (hPa) |
平均 (％) |
最小 | ||||||||||||
| 日平均 (℃) | 日最高 (℃) | 日最低 (℃) |
気温 (℃) | 日 時:分 | 気温 (℃) | 日 時:分 | ＜0℃ | ≧25℃ | ＜0℃ | ≧25℃ | ＜0℃ | ≧25℃ | ≧30℃ | ≧35℃ | 湿度 (％) | 日 | |||||
| 上旬 | -7.2 | -4.0 | -11.6 | 0.2 | 08 15:00 | -18.5 | 10 21:00 | 0 | 10 | 0 | 10 | 0 | 9 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | -7.4 | -3.7 | -12.7 | 5.0 | 17 12:00 | -21.0 | 20 19:00 | 0 | 9 | 0 | 10 | 0 | 8 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | -5.4 | -2.5 | -9.8 | 2.3 | 29 21:00 | -20.6 | 21 03:00 | 0 | 10 | 0 | 11 | 0 | 6 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | -6.7 | -2.5 | -13.6 | 2.5 | 09 17:00 | -19.3 | 01 03:00 | 0 | 10 | 0 | 10 | 0 | 7 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | -7.4 | -4.0 | -10.8 | 6.0 | 11 12:00 | -17.6 | 19 22:00 | 0 | 9 | 0 | 10 | 0 | 8 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | -2.4 | -0.3 | -5.6 | 1.9 | 23 24:00 | -12.4 | 21 03:00 | 0 | 8 | 0 | 8 | 0 | 5 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | -2.8 | -0.9 | -5.6 | 1.7 | 05 19:00 | -10.0 | 08 06:00 | 0 | 10 | 0 | 10 | 0 | 9 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | -0.7 | 2.0 | -4.0 | 5.3 | 20 16:00 | -8.6 | 12 03:00 | 0 | 6 | 0 | 9 | 0 | 1 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | -0.2 | 2.1 | -3.1 | 5.9 | 24 12:00 | -7.8 | 31 06:00 | 0 | 5 | 0 | 10 | 0 | 2 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 2.9 | 5.6 | -0.8 | 9.9 | 07 14:00 | -5.0 | 03 05:00 | 0 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 4.5 | 7.7 | 0.6 | 16.9 | 20 13:00 | -2.3 | 13 03:00 | 0 | 2 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 7.2 | 10.4 | 3.4 | 19.2 | 30 16:00 | -0.4 | 27 04:00 | 28 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 8.7 | 12.7 | 4.6 | 20.4 | 10 08:00 | 0.2 | 04 05:00 | 51 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 10.7 | 15.0 | 5.6 | 18.4 | 17 21:00 | -0.1 | 15 04:00 | 84 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 9.6 | 13.5 | 5.7 | 18.1 | 29 14:00 | 2.9 | 23 04:00 | 47 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 14.0 | 17.4 ) | 10.0 ) | 21.8 ) | 02 13:00 | 4.5 ) | 01 02:00 | 140 | 0 | 0 | 0 ) | 0 | 0 | 0 ) | 0 ) | 0 ) | /// | /// | /// | /// | |
| 中旬 | 12.3 | 16.3 | 6.9 | 23.3 | 20 13:00 | 3.3 | 14 04:00 | 114 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 17.2 | 22.3 | 11.7 | 27.7 | 26 11:00 | 8.3 | 28 02:00 | 172 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 17.8 | 20.9 | 14.5 | 24.0 | 05 09:00 | 12.6 | 02 24:00 | 178 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 18.6 | 21.4 | 15.8 | 28.0 | 17 11:00 | 13.1 | 13 01:00 | 186 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 19.5 | 21.4 | 17.6 | 23.3 | 31 15:00 | 11.4 | 31 23:00 | 214 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 18.4 | 21.2 | 14.9 | 24.4 | 05 11:00 | 10.1 | 01 03:00 | 184 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 19.3 | 21.8 | 16.4 | 23.4 | 17 13:00 | 14.0 | 18 04:00 | 193 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 19.1 | 21.5 | 17.0 | 25.6 | 29 13:00 | 14.0 | 26 02:00 | 210 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 19.3 | 23.6 | 15.1 | 29.5 | 06 11:00 | 9.8 | 03 05:00 | 193 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 14.7 | 19.1 | 9.7 | 22.9 | 14 11:00 | 4.9 | 20 06:00 | 147 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 14.7 | 18.7 | 10.3 | 23.0 | 21 12:00 | 4.1 | 30 05:00 | 137 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 14.4 | 17.7 | 11.5 | 22.1 | 06 10:00 | 7.4 | 02 04:00 | 144 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 10.9 | 14.3 | 6.5 | 20.6 | 11 12:00 | 0.9 | 13 03:00 | 74 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | 8.9 | 10.8 | 5.6 | 16.1 | 29 12:00 | 2.1 | 31 03:00 | 49 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | 5.7 | 8.3 | 2.2 | 11.0 | 10 18:00 | -0.2 | 06 23:00 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | 4.2 | 7.6 ) | 1.6 ) | 11.8 ) | 16 14:00 | -3.4 ) | 20 22:00 | 0 | 1 | 0 | 4 | 0 | 0 | 0 ) | 0 ) | 0 ) | /// | /// | /// | /// | |
| 下旬 | -2.1 | 0.3 | -4.0 | 6.3 | 23 24:00 | -8.4 | 30 04:00 | 0 | 7 | 0 | 10 | 0 | 6 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 上旬 | -1.8 | 0.6 | -5.3 | 6.1 | 10 24:00 | -10.9 | 07 03:00 | 0 | 7 | 0 | 9 | 0 | 5 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 中旬 | -3.2 | -0.4 | -5.6 | 6.0 | 11 05:00 | -9.5 | 17 19:00 | 0 | 9 | 0 | 10 | 0 | 6 | 0 | 0 | 0 | /// | /// | /// | /// | |
| 下旬 | -2.4 | 0.4 | -5.0 | 5.7 | 28 24:00 | -11.5 | 31 04:00 | 0 | 7 | 0 | 10 | 0 | 4 | 0 | 0 | 0 | /// | /// | /// | /// | |
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