半旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
室蘭（胆振地方) 2020年（半旬ごとの値） 詳細（気温・蒸気圧・湿度）
| 月 | 半旬 | 日～日 | 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 | ||||||||||||||||
| 第1半旬 | 1～ 5 | -3.0 | -0.8 | 1.5 | 03 | -3.0 | 01 | -5.1 | -6.1 | 01 | -3.8 | 03 | 5 | 0 | 5 | 0 | 4 | 0 | 0 | 0 | 3.4 | 69 | 50 | 03 | |
| 第2半旬 | 6～10 | 0.0 | 2.5 | 3.8 | 07 | 1.0 | 06 | -2.5 | -4.2 | 10 | -0.7 | 08 | 2 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 4.5 | 73 | 53 | 09 | |
| 第3半旬 | 11～15 | -0.6 | 2.1 | 5.1 | 11 | 0.1 | 13 | -2.4 | -4.3 | 15 | -0.5 | 11 | 3 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 4.0 | 68 | 50 | 14 | |
| 第4半旬 | 16～20 | -1.1 | 1.2 | 2.7 | 19 | 0.0 | 16 | -3.0 | -4.0 | 19 | -0.9 | 20 | 4 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 4.2 | 74 | 43 | 18 | |
| 第5半旬 | 21～25 | -0.9 | 1.5 | 4.1 | 22 | -2.3 | 25 | -3.1 | -5.3 | 25 | -1.3 | 23 | 3 | 0 | 5 | 0 | 1 | 0 | 0 | 0 | 4.2 | 71 | 51 | 24 | |
| 第6半旬 | 26～31 | 0.9 | 3.0 | 5.6 | 30 | -0.7 | 26 | -1.1 | -5.3 | 26 | 2.2 | 30 | 1 | 0 | 3 | 0 | 1 | 0 | 0 | 0 | 5.1 | 76 | 43 | 28 | |
| 第1半旬 | 1～ 5 | -2.4 | 0.2 | 3.4 | 01 | -2.5 | 05 | -4.3 | -7.5 | 05 | -1.8 | 01 | 4 | 0 | 5 | 0 | 3 | 0 | 0 | 0 | 3.6 | 69 | 45 | 05 | |
| 第2半旬 | 6～10 | -5.2 | -2.3 | -0.2 | 07 | -5.7 | 09 | -7.9 | -9.9 | 09 | -4.8 | 07 | 5 | 0 | 5 | 0 | 5 | 0 | 0 | 0 | 2.8 | 66 | 36 | 06 | |
| 第3半旬 | 11～15 | 2.5 | 5.8 | 10.2 | 13 | 1.4 | 11 | -0.6 | -3.9 | 11 | 1.8 | 14 | 1 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 5.7 | 75 | 45 | 15 | |
| 第4半旬 | 16～20 | -0.3 | 1.7 | 2.9 | 17 | -0.9 | 16 | -1.9 | -3.1 | 16 | -0.5 | 18 | 2 | 0 | 5 | 0 | 1 | 0 | 0 | 0 | 4.7 | 78 | 47 | 20 | |
| 第5半旬 | 21～25 | 1.0 | 3.6 | 4.8 | 22 | 2.6 | 21 | -0.9 | -1.8 | 25 | 0.1 | 23 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 5.0 | 76 | 49 | 21 | |
| 第6半旬 | 26～29 | -0.8 | 2.6 | 3.6 | 26 | 0.9 | 29 | -3.2 | -4.5 | 28 | -2.3 | 26 | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 4.1 | 71 | 36 | 26 | |
| 第1半旬 | 1～ 5 | 0.8 | 2.5 | 4.6 | 03 | 1.6 | 05 | -0.4 | -2.0 | 01 | 0.2 | 05 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 5.8 | 91 | 63 | 03 | |
| 第2半旬 | 6～10 | 2.2 | 5.3 | 7.7 | 10 | 2.8 | 07 | -0.2 | -1.4 | 07 | 0.4 | 10 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 6.2 | 86 | 54 | 07 | |
| 第3半旬 | 11～15 | 1.7 | 5.6 | 6.8 | 11 | 4.2 | 14 | -1.1 | -3.0 | 15 | 0.9 | 11 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 5.4 | 78 | 41 | 15 | |
| 第4半旬 | 16～20 | 3.7 | 8.1 | 11.4 | 19 | 4.9 | 16 | 0.2 | -2.3 | 16 | 2.6 | 20 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 6.1 | 75 | 43 | 18 | |
| 第5半旬 | 21～25 | 4.3 | 9.2 | 12.1 | 22 | 6.2 | 23 | 1.0 | -1.0 | 24 | 3.4 | 21 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 5.5 | 68 | 28 | 22 | |
| 第6半旬 | 26～31 | 5.2 | 9.4 | 13.1 | 26 | 7.3 | 28 | 1.8 | -0.1 | 30 | 3.7 | 26 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 6.1 | 69 | 30 | 29 | |
| 第1半旬 | 1～ 5 | 6.4 | 10.5 | 13.9 | 03 | 8.1 | 05 | 3.3 | 1.4 | 05 | 4.1 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.1 | 75 | 34 | 03 | |
| 第2半旬 | 6～10 | 5.0 | 10.0 | 12.6 | 07 | 7.0 | 06 | 2.1 | 1.2 | 06 | 3.2 | 07 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 81 | 45 | 10 | |
| 第3半旬 | 11～15 | 4.7 | 9.7 | 12.9 | 14 | 8.3 | 13 | 1.3 | 0.5 | 13 | 2.3 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.1 | 73 | 26 | 14 | |
| 第4半旬 | 16～20 | 6.3 | 10.5 | 13.1 | 19 | 8.5 | 18 | 3.6 | 1.2 | 17 | 5.5 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 76 | 26 | 16 | |
| 第5半旬 | 21～25 | 5.5 | 9.5 | 10.5 | 25 | 8.2 | 23 | 2.2 | 0.2 | 24 | 3.3 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.9 | 76 | 42 | 22 | |
| 第6半旬 | 26～30 | 8.1 | 12.8 | 15.6 | 30 | 10.4 | 27 | 4.6 | 3.1 | 28 | 6.1 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.4 | 78 | 49 | 28 | |
| 第1半旬 | 1～ 5 | 12.6 | 17.9 | 21.6 | 03 | 15.0 | 05 | 8.6 | 6.1 | 02 | 12.4 | 03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.6 | 79 | 44 | 05 | |
| 第2半旬 | 6～10 | 10.8 | 15.3 | 20.0 | 09 | 9.3 | 06 | 7.1 | 5.0 | 08 | 11.2 | 09 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.4 | 75 | 27 | 09 | |
| 第3半旬 | 11～15 | 12.5 | 18.3 | 21.4 | 15 | 16.3 | 11 | 8.8 | 8.3 | 15 | 9.7 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.4 | 73 | 31 | 15 | |
| 第4半旬 | 16～20 | 8.7 | 11.7 | 20.5 | 17 | 7.2 | 20 | 7.1 | 4.8 | 20 | 8.5 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.9 | 87 | 56 | 19* | |
| 第5半旬 | 21～25 | 9.3 | 11.7 | 14.6 | 24 | 8.4 | 22 | 8.0 | 5.8 | 21 | 10.1 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.1 | 94 | 71 | 21 | |
| 第6半旬 | 26～31 | 15.3 | 20.8 | 25.6 | 30 | 14.4 | 27 | 11.4 | 8.7 | 26 | 14.3 | 30 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 12.0 | 72 | 29 | 31 | |
| 第1半旬 | 1～ 5 | 16.1 | 21.5 | 22.7 | 03 | 18.5 | 04 | 12.6 | 11.4 | 01 | 13.3 | 05 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14.2 | 79 | 41 | 03 | |
| 第2半旬 | 6～10 | 16.2 | 21.3 | 25.8 | 10 | 18.5 | 07 | 12.3 | 11.2 | 08 | 13.4 | 09 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 14.5 | 80 | 53 | 10* | |
| 第3半旬 | 11～15 | 18.7 | 23.5 | 27.1 | 13 | 20.6 | 11 | 15.7 | 14.9 | 15 | 16.8 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 17.1 | 81 | 40 | 13 | |
| 第4半旬 | 16～20 | 16.3 | 20.0 | 21.3 | 19* | 17.8 | 16 | 14.3 | 13.0 | 20 | 14.9 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.4 | 89 | 59 | 20 | |
| 第5半旬 | 21～25 | 15.7 | 18.3 | 20.5 | 23 | 15.8 | 25 | 13.8 | 11.0 | 21 | 15.2 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.2 | 91 | 64 | 21 | |
| 第6半旬 | 26～30 | 14.9 | 16.2 | 17.6 | 30 | 15.2 | 26 | 14.1 | 13.9 | 26 | 14.3 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.8 | 99 | 89 | 29 | |
| 第1半旬 | 1～ 5 | 17.1 | 19.3 | 21.5 | 03 | 16.7 | 04 | 15.8 | 14.8 | 04 | 16.6 | 01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 18.9 | 97 | 76 | 03 | |
| 第2半旬 | 6～10 | 19.0 | 22.4 | 26.1 | 10 | 18.1 | 07 | 16.8 | 15.7 | 06 | 17.6 | 10 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 19.5 | 89 | 49 | 10 | |
| 第3半旬 | 11～15 | 18.3 | 20.9 | 22.3 | 13* | 19.2 | 14 | 16.7 | 15.9 | 15 | 17.2 | 11 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 18.8 | 90 | 77 | 13 | |
| 第4半旬 | 16～20 | 18.3 | 21.4 | 23.2 | 20 | 20.6 | 18* | 16.8 | 15.9 | 16 | 17.8 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19.4 | 92 | 75 | 16 | |
| 第5半旬 | 21～25 | 19.5 | 21.5 | 23.8 | 22 | 19.0 | 21 | 18.5 | 17.4 | 25 | 19.5 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22.2 | 98 | 82 | 24 | |
| 第6半旬 | 26～31 | 18.4 | 20.8 | 23.3 | 31 | 17.2 | 27 | 16.9 | 16.0 | 28 | 18.4 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 19.9 | 94 | 69 | 30 | |
| 第1半旬 | 1～ 5 | 21.9 | 25.2 | 28.4 | 05 | 22.2 | 03 | 20.1 | 18.5 | 01 | 22.6 | 05 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 24.9 | 95 | 72 | 05 | |
| 第2半旬 | 6～10 | 20.5 | 23.0 | 25.6 | 06 | 20.2 | 09 | 18.9 | 17.7 | 08 | 21.3 | 06 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 22.7 | 94 | 75 | 07 | |
| 第3半旬 | 11～15 | 22.1 | 25.6 | 28.1 | 11 | 20.9 | 14 | 19.4 | 17.1 | 15 | 21.9 | 11 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 24.0 | 90 | 62 | 13 | |
| 第4半旬 | 16～20 | 23.1 | 27.4 | 29.2 | 19 | 26.1 | 18 | 19.9 | 19.0 | 20 | 20.8 | 19 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 24.0 | 85 | 57 | 18 | |
| 第5半旬 | 21～25 | 20.5 | 23.5 | 24.6 | 23 | 21.3 | 21 | 18.5 | 16.8 | 22 | 20.4 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 22.1 | 91 | 66 | 21 | |
| 第6半旬 | 26～31 | 21.1 | 24.8 | 31.8 | 29 | 18.9 | 30 | 18.7 | 14.5 | 31* | 21.5 | 28* | 0 | 0 | 0 | 0 | 0 | 4 | 1 | 0 | 23.3 | 92 | 65 | 29 | |
| 第1半旬 | 1～ 5 | 20.6 | 21.8 | 24.0 | 05 | 19.6 | 01 | 19.4 | 17.2 | 01 | 20.7 | 05 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 23.4 | 96 | 83 | 01 | |
| 第2半旬 | 6～10 | 22.8 | 25.8 | 28.7 | 08 | 22.6 | 06 | 21.0 | 20.1 | 06 | 21.8 | 08 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 25.9 | 94 | 59 | 09 | |
| 第3半旬 | 11～15 | 18.3 | 20.3 | 25.0 | 11 | 17.7 | 13 | 16.5 | 14.1 | 13 | 19.7 | 11 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 18.9 | 89 | 70 | 13 | |
| 第4半旬 | 16～20 | 20.2 | 23.2 | 23.8 | 17* | 21.8 | 18 | 17.9 | 15.3 | 20 | 20.0 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20.8 | 88 | 56 | 20* | |
| 第5半旬 | 21～25 | 17.5 | 20.4 | 22.3 | 22 | 17.4 | 25 | 15.0 | 12.0 | 25 | 17.0 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 15.6 | 78 | 59 | 21 | |
| 第6半旬 | 26～30 | 16.5 | 20.6 | 21.6 | 29 | 18.8 | 26 | 13.5 | 11.9 | 26 | 14.7 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 14.3 | 76 | 44 | 28 | |
| 第1半旬 | 1～ 5 | 16.8 | 19.4 | 21.0 | 03 | 18.4 | 05* | 14.2 | 11.8 | 05 | 16.2 | 03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.7 | 87 | 53 | 05 | |
| 第2半旬 | 6～10 | 14.4 | 18.2 | 19.0 | 06 | 17.6 | 08 | 11.5 | 9.5 | 09 | 12.9 | 07 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.8 | 72 | 47 | 08 | |
| 第3半旬 | 11～15 | 14.4 | 17.3 | 19.2 | 13 | 13.7 | 15 | 11.9 | 8.2 | 15 | 15.9 | 12 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.7 | 74 | 44 | 15 | |
| 第4半旬 | 16～20 | 13.4 | 17.1 | 18.5 | 20 | 15.4 | 16 | 10.0 | 7.3 | 16 | 12.0 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.6 | 63 | 35 | 19 | |
| 第5半旬 | 21～25 | 13.1 | 15.8 | 19.4 | 22 | 12.5 | 24 | 10.0 | 7.5 | 24 | 14.5 | 22 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.8 | 76 | 57 | 24 | |
| 第6半旬 | 26～31 | 10.7 | 14.2 | 15.4 | 28 | 12.7 | 30 | 7.2 | 5.9 | 30 | 8.4 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.2 | 72 | 48 | 29 | |
| 第1半旬 | 1～ 5 | 10.2 | 13.0 | 16.2 | 01 | 8.4 | 04 | 6.6 | 3.7 | 04 | 8.5 | 02 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.0 | 70 | 46 | 05* | |
| 第2半旬 | 6～10 | 8.8 | 11.8 | 18.5 | 07 | 4.8 | 10 | 5.8 | 0.6 | 10 | 11.3 | 07 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.7 | 74 | 42 | 08 | |
| 第3半旬 | 11～15 | 7.3 | 10.4 | 13.7 | 13 | 6.3 | 11 | 3.8 | 0.4 | 11 | 6.3 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.2 | 70 | 47 | 11 | |
| 第4半旬 | 16～20 | 10.6 | 14.1 | 17.5 | 20 | 9.5 | 17 | 7.5 | 5.3 | 16 | 9.7 | 19 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.3 | 77 | 49 | 17* | |
| 第5半旬 | 21～25 | 5.2 | 7.4 | 10.4 | 21 | 4.7 | 24 | 2.7 | 1.7 | 23 | 4.6 | 21 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 73 | 56 | 25* | |
| 第6半旬 | 26～30 | 3.3 | 5.6 | 7.7 | 26 | 4.2 | 27 | 2.0 | 1.2 | 30 | 2.5 | 26 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4.7 | 61 | 46 | 26 | |
| 第1半旬 | 1～ 5 | 2.0 | 4.0 | 7.1 | 05 | 1.9 | 01 | 0.4 | -0.6 | 04* | 3.6 | 05 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 4.6 | 66 | 52 | 05* | |
| 第2半旬 | 6～10 | 3.3 | 5.7 | 8.2 | 06 | 2.5 | 08 | 0.9 | 0.6 | 08 | 1.3 | 09 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.3 | 68 | 47 | 09 | |
| 第3半旬 | 11～15 | -0.4 | 1.8 | 7.5 | 11 | -3.0 | 15 | -2.8 | -5.6 | 15 | -0.1 | 12 | 3 | 0 | 5 | 0 | 2 | 0 | 0 | 0 | 4.1 | 67 | 48 | 13 | |
| 第4半旬 | 16～20 | -3.8 | -1.6 | 1.2 | 18 | -3.5 | 19 | -5.8 | -8.6 | 20 | -3.5 | 18 | 5 | 0 | 5 | 0 | 4 | 0 | 0 | 0 | 3.2 | 69 | 49 | 20 | |
| 第5半旬 | 21～25 | 2.0 | 4.7 | 9.0 | 24 | 1.7 | 21 | -0.6 | -4.1 | 21 | 1.9 | 23 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 5.1 | 71 | 53 | 24 | |
| 第6半旬 | 26～31 | -3.6 | -1.6 | 1.8 | 28 | -5.0 | 31 | -5.6 | -7.8 | 31 | -2.9 | 28 | 6 | 0 | 6 | 0 | 5 | 0 | 0 | 0 | 3.5 | 73 | 52 | 31 | |