月ごとの値
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室蘭（胆振地方) 1982年（月ごとの値） 詳細（気温・蒸気圧・湿度）
| 月 | 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 | ||||||||||||||
| -2.2 | 0.2 | 7.5 | 12 | -6.0 | 15 | -4.7 | -8.4 | 15 | 1.1 | 04 | 25 | 0 | 30 | 0 | 17 | 0 | 0 | 0 | 3.7 | 70 | 43 | 12 | |
| -3.0 | -1.1 | 4.3 | 28 | -5.0 | 08 | -5.1 | -9.3 | 05 | -0.4 | 20 | 23 | 0 | 28 | 0 | 18 | 0 | 0 | 0 | 3.5 | 69 | 38 | 14 | |
| 1.0 | 3.5 | 10.7 | 30 | -2.3 | 07 | -1.1 | -5.0 | 07 | 3.8 | 30 | 6 | 0 | 24 | 0 | 1 | 0 | 0 | 0 | 4.9 | 74 | 39 | 19 | |
| 4.7 | 7.8 | 14.9 | 26 | 1.9 | 02 | 2.4 | -1.1 | 05 | 5.7 | 30 | 0 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 6.7 | 78 | 31 | 01 | |
| 10.6 | 14.7 | 20.1 | 27 | 9.6 | 20 | 7.5 | 5.7 | 19* | 12.4 | 27 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9.8 | 77 | 27 | 16 | |
| 13.7 | 17.0 | 22.6 | 10 | 9.6 | 02 | 10.9 | 7.5 | 03 | 14.1 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.4 | 80 | 36 | 11 | |
| 17.2 | 20.4 | 28.3 | 09 | 15.3 | 02 | 15.1 | 11.1 | 01 | 18.0 | 10 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 17.5 | 90 | 44 | 14 | |
| 20.2 | 22.6 | 26.9 | 04 | 18.7 | 01 | 18.6 | 16.2 | 12 | 20.5 | 29 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 21.4 | 90 | 55 | 25 | |
| 17.8 | 20.6 | 24.5 | 01 | 17.8 | 10 | 15.1 | 12.1 | 21 | 18.2 | 02 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.4 | 80 | 41 | 21 | |
| 13.6 | 16.6 | 20.8 | 03 | 8.8 | 26 | 10.2 | 4.0 | 17 | 15.0 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 11.4 | 71 | 28 | 09 | |
| 6.8 | 9.5 | 16.2 | 30 | 0.7 | 25 | 3.8 | -6.9 | 25* | 11.0 | 04 | 3 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 7.0 | 67 | 42 | 06 | |
| 1.6 | 3.6 | 9.7 | 22 | -2.1 | 06 | -0.6 | -5.8 | 06 | 3.1 | 09* | 8 | 0 | 18 | 0 | 4 | 0 | 0 | 0 | 4.7 | 68 | 45 | 18 | |