旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
室蘭（胆振地方) 1970年（旬ごとの値） 詳細（気温・蒸気圧・湿度）
| 月 | 旬 | 気温(℃) | 蒸気圧 (hPa) | 湿度(％) | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 日平均 | 最高気温 | 最低気温 | 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 | 平均 | 最高 | 最低 | 平均 | 最低 | 最高 | ＜0℃ | ≧25℃ | ＜0℃ | ≧25℃ | ＜0℃ | ≧25℃ | ≧30℃ | ≧35℃ | 平均 | 平均 | 最小 | |||||||
| 値 | 日 | 値 | 日 | 値 | 日 | 値 | 日 | 値 | 日 | |||||||||||||||
| 上旬 | -5.4 | -3.3 | 0.8 | 01 | -5.9 | 03 | -7.3 | -9.4 | 05 | -4.1 | 01 | 10 | 0 | 10 | 0 | 9 | 0 | 0 | 0 | 2.9 | 69 | 48 | 02 | |
| 中旬 | -1.7 | 0.6 | 4.0 | 13 | -3.3 | 15 | -4.0 | -6.7 | 14 | -0.2 | 20 | 6 | 0 | 10 | 0 | 6 | 0 | 0 | 0 | 4.0 | 73 | 42 | 13 | |
| 下旬 | -2.1 | 0.1 | 4.5 | 31 | -2.4 | 25 | -4.3 | -6.8 | 27 | 0.2 | 31 | 10 | 0 | 10 | 0 | 5 | 0 | 0 | 0 | 3.9 | 74 | 50 | 24 | |
| 上旬 | -1.5 | 1.1 | 3.7 | 08 | -1.4 | 04 | -4.1 | -8.1 | 10 | 0.2 | 08 | 6 | 0 | 9 | 0 | 4 | 0 | 0 | 0 | 4.2 | 75 | 41 | 04 | |
| 中旬 | -0.8 | 1.8 | 7.2 | 13 | -2.9 | 15 | -3.6 | -6.4 | 15 | -0.7 | 18 | 6 | 0 | 10 | 0 | 4 | 0 | 0 | 0 | 4.3 | 72 | 49 | 17* | |
| 下旬 | -3.6 | -0.9 | 7.2 | 21 | -4.0 | 22 | -5.8 | -7.7 | 22 | -4.2 | 27* | 8 | 0 | 8 | 0 | 6 | 0 | 0 | 0 | 3.4 | 70 | 41 | 28 | |
| 上旬 | -3.5 | -1.2 | 3.5 | 08 | -5.4 | 06 | -6.0 | -8.7 | 03* | -1.4 | 08 | 9 | 0 | 10 | 0 | 6 | 0 | 0 | 0 | 3.5 | 72 | 43 | 01 | |
| 中旬 | -2.4 | 0.1 | 3.6 | 16 | -1.9 | 14 | -4.4 | -6.4 | 20 | -1.1 | 16 | 9 | 0 | 10 | 0 | 5 | 0 | 0 | 0 | 3.9 | 74 | 47 | 20 | |
| 下旬 | 0.1 | 2.7 | 8.0 | 28 | -1.4 | 21 | -2.5 | -6.0 | 22 | 1.3 | 28 | 5 | 0 | 9 | 0 | 3 | 0 | 0 | 0 | 4.5 | 72 | 43 | 27 | |
| 上旬 | 3.5 | 6.7 | 8.7 | 09 | 3.0 | 01 | 1.1 | -1.3 | 02 | 3.6 | 09 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 5.4 | 68 | 39 | 10 | |
| 中旬 | 5.1 | 8.9 | 13.4 | 17 | 3.2 | 12 | 2.4 | 0.1 | 12 | 5.1 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 74 | 36 | 19 | |
| 下旬 | 7.5 | 11.8 | 17.8 | 30 | 8.1 | 26 | 3.9 | 1.4 | 23 | 6.3 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.0 | 78 | 23 | 24 | |
| 上旬 | 9.4 | 12.1 | 19.4 | 01 | 10.0 | 02 | 7.4 | 6.1 | 02* | 8.9 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.8 | 84 | 31 | 01 | |
| 中旬 | 10.8 | 14.5 | 19.5 | 18 | 11.6 | 11 | 8.2 | 5.9 | 15 | 11.0 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.6 | 75 | 33 | 15 | |
| 下旬 | 12.6 | 16.6 | 21.0 | 30 | 13.9 | 23 | 9.7 | 7.8 | 25* | 11.4 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.4 | 80 | 40 | 26 | |
| 上旬 | 14.5 | 18.9 | 24.8 | 06 | 12.8 | 01 | 11.3 | 7.9 | 03 | 14.7 | 07 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.7 | 79 | 34 | 06* | |
| 中旬 | 14.6 | 17.4 | 22.6 | 11 | 13.9 | 20 | 12.1 | 9.5 | 15 | 14.9 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13.5 | 82 | 48 | 11 | |
| 下旬 | 15.7 | 19.4 | 23.0 | 24 | 16.6 | 30 | 13.0 | 11.5 | 29 | 13.8 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15.2 | 85 | 50 | 28 | |
| 上旬 | 14.1 | 16.2 | 21.3 | 04 | 12.4 | 07 | 12.7 | 10.1 | 08 | 14.6 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14.8 | 90 | 67 | 08 | |
| 中旬 | 17.4 | 19.8 | 23.3 | 16 | 15.4 | 11 | 15.6 | 14.2 | 12 | 16.5 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 18.0 | 91 | 69 | 20* | |
| 下旬 | 24.1 | 27.6 | 29.9 | 30 | 20.0 | 21 | 20.9 | 16.0 | 21 | 23.1 | 30 | 0 | 5 | 0 | 0 | 0 | 10 | 0 | 0 | 23.9 | 80 | 50 | 26 | |
| 上旬 | 19.5 | 22.5 | 25.9 | 08 | 16.4 | 04 | 17.1 | 14.9 | 04 | 18.4 | 01 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 19.3 | 85 | 41 | 08 | |
| 中旬 | 19.8 | 22.3 | 26.0 | 14 | 19.2 | 19 | 17.9 | 16.2 | 18 | 19.5 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 20.6 | 89 | 61 | 17 | |
| 下旬 | 21.5 | 24.6 | 27.6 | 23 | 22.2 | 30 | 19.5 | 16.6 | 30 | 21.8 | 23 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 22.0 | 84 | 59 | 29 | |
| 上旬 | 19.5 | 22.3 | 26.7 | 02 | 18.5 | 04 | 16.8 | 15.1 | 08 | 20.2 | 02 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 18.5 | 81 | 44 | 07 | |
| 中旬 | 18.3 | 21.6 | 24.3 | 15 | 19.3 | 17 | 15.5 | 13.2 | 11 | 18.1 | 18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15.8 | 75 | 43 | 11 | |
| 下旬 | 16.8 | 19.9 | 22.4 | 24* | 17.0 | 30 | 13.9 | 11.4 | 28 | 16.2 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14.4 | 74 | 42 | 27 | |
| 上旬 | 15.2 | 19.0 | 21.7 | 07 | 14.4 | 01 | 11.7 | 9.1 | 02 | 14.8 | 08 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.0 | 68 | 42 | 05 | |
| 中旬 | 12.7 | 16.3 | 19.8 | 13 | 11.8 | 19 | 9.2 | 4.9 | 20* | 14.4 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.5 | 69 | 35 | 15 | |
| 下旬 | 10.7 | 13.7 | 20.2 | 25 | 5.4 | 27 | 8.2 | 1.9 | 31 | 16.3 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.1 | 73 | 40 | 26 | |
| 上旬 | 9.5 | 12.0 | 16.2 | 10 | 8.3 | 01 | 6.8 | 1.7 | 01 | 9.8 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.3 | 69 | 40 | 10 | |
| 中旬 | 7.1 | 11.1 | 15.2 | 13 | 1.4 | 15 | 4.4 | -2.8 | 16 | 10.3 | 13 | 1 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 7.8 | 73 | 51 | 17* | |
| 下旬 | 2.1 | 4.9 | 11.4 | 21 | -2.1 | 29 | -0.2 | -6.6 | 30 | 6.3 | 21 | 2 | 0 | 4 | 0 | 2 | 0 | 0 | 0 | 5.4 | 73 | 39 | 28 | |
| 上旬 | -0.7 | 1.4 | 4.7 | 07 | -1.5 | 03 | -2.7 | -6.0 | 08 | 0.3 | 07 | 7 | 0 | 9 | 0 | 3 | 0 | 0 | 0 | 4.2 | 71 | 41 | 08 | |
| 中旬 | 1.1 | 3.8 | 10.7 | 13 | -2.1 | 19 | -1.4 | -5.5 | 19 | 2.6 | 17 | 5 | 0 | 7 | 0 | 2 | 0 | 0 | 0 | 4.4 | 64 | 44 | 20 | |
| 下旬 | -2.1 | -0.3 | 3.2 | 31 | -4.7 | 25 | -4.1 | -7.7 | 24 | -0.7 | 31 | 8 | 0 | 11 | 0 | 6 | 0 | 0 | 0 | 3.3 | 62 | 41 | 23 | |