月ごとの値
 |  |
 |  |
 |  |  |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
函館（渡島地方) 2019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 | ||||||||||||||
| -2.3 | 1.1 | 5.5 | 15 | -4.1 | 21 | -6.3 | -10.0 | 17 | -1.1 | 10 | 27 | 0 | 31 | 0 | 10 | 0 | 0 | 0 | 3.9 | 75 | 43 | 11 | |
| -1.8 | 1.7 | 7.9 | 25 | -8.8 | 08 | -5.8 | -14.1 | 09 | 0.6 | 20 | 17 | 0 | 27 | 0 | 10 | 0 | 0 | 0 | 3.9 | 71 | 30 | 25 | |
| 3.2 | 7.3 | 14.1 | 20 | 1.5 | 24 | -1.0 | -5.2 | 30 | 4.8 | 19 | 2 | 0 | 21 | 0 | 0 | 0 | 0 | 0 | 5.1 | 66 | 24 | 30 | |
| 7.6 | 13.0 | 21.1 | 24 | 4.7 | 02 | 2.3 | -3.0 | 03 | 6.8 | 24 | 0 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 6.6 | 64 | 15 | 20 | |
| 14.4 | 19.8 | 28.0 | 26 | 12.6 | 02 | 9.3 | 3.3 | 12 | 15.6 | 26 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 11.2 | 69 | 20 | 07 | |
| 16.9 | 21.3 | 25.2 | 15 | 17.5 | 30* | 13.0 | 8.3 | 18 | 16.0 | 22 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 14.7 | 76 | 41 | 19 | |
| 20.5 | 24.1 | 29.9 | 31 | 18.9 | 04 | 18.0 | 12.6 | 10 | 24.1 | 31 | 0 | 5 | 0 | 0 | 0 | 9 | 0 | 0 | 20.5 | 84 | 45 | 09 | |
| 22.6 | 26.2 | 31.1 | 06 | 19.1 | 10 | 19.5 | 12.9 | 26 | 24.0 | 01 | 0 | 7 | 0 | 0 | 0 | 20 | 5 | 0 | 22.7 | 83 | 46 | 27 | |
| 19.8 | 24.6 | 30.6 | 10* | 19.1 | 19 | 15.1 | 7.9 | 26 | 23.3 | 09 | 0 | 4 | 0 | 0 | 0 | 13 | 3 | 0 | 17.2 | 73 | 26 | 26 | |
| 14.1 | 18.4 | 24.9 | 02 | 13.8 | 27 | 9.3 | 2.2 | 18 | 17.7 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.5 | 76 | 40 | 28 | |
| 4.8 | 9.1 | 16.9 | 24 | 0.8 | 28 | 0.3 | -5.2 | 28 | 9.5 | 02* | 3 | 0 | 14 | 0 | 0 | 0 | 0 | 0 | 6.1 | 68 | 37 | 02* | |
| 0.3 | 4.0 | 12.5 | 02 | -2.6 | 24 | -3.4 | -8.9 | 06 | 4.0 | 11 | 18 | 0 | 26 | 0 | 6 | 0 | 0 | 0 | 5.0 | 77 | 42 | 07 | |