旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
東京（東京都) 1998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 | 6.4 | 10.3 | 13.6 | 06 | 5.0 | 08 | 3.2 | 0.4 | 09* | 5.5 | 03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.6 | 58 | 23 | 07 | |
| 中旬 | 4.4 | 7.8 | 9.8 | 19* | 4.2 | 12 | 1.3 | -0.7 | 20 | 3.2 | 19 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 6.1 | 74 | 22 | 20 | |
| 下旬 | 5.3 | 9.9 | 13.6 | 21 | 7.5 | 23 | 1.1 | -0.8 | 26 | 3.2 | 23 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 4.0 | 45 | 11 | 24 | |
| 上旬 | 6.1 | 10.3 | 12.5 | 08 | 8.1 | 10 | 2.6 | 0.5 | 10 | 3.4 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4.4 | 46 | 17 | 09 | |
| 中旬 | 7.7 | 12.9 | 23.1 | 14 | 8.1 | 15 | 3.8 | 1.3 | 15 | 7.7 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 61 | 20 | 11 | |
| 下旬 | 7.3 | 10.7 | 14.5 | 27 | 7.1 | 25 | 4.5 | 1.4 | 22 | 8.0 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.7 | 75 | 42 | 23* | |
| 上旬 | 7.8 | 12.5 | 16.5 | 04 | 8.2 | 01 | 3.4 | 0.7 | 01 | 7.2 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.8 | 57 | 17 | 09 | |
| 中旬 | 10.0 | 14.2 | 19.6 | 20 | 11.6 | 16 | 5.8 | 2.8 | 18 | 12.2 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.8 | 53 | 18 | 16 | |
| 下旬 | 12.4 | 16.4 | 24.5 | 30 | 7.4 | 22 | 8.4 | 2.6 | 23 | 12.4 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.8 | 61 | 18 | 26 | |
| 上旬 | 11.8 | 15.3 | 23.4 | 10 | 6.7 | 02 | 8.1 | 2.5 | 02 | 11.9 | 06 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.5 | 76 | 25 | 01 | |
| 中旬 | 17.9 | 21.9 | 27.1 | 20 | 14.1 | 17 | 14.2 | 10.7 | 16 | 20.0 | 14 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 15.6 | 75 | 24 | 20 | |
| 下旬 | 19.3 | 23.1 | 26.1 | 23 | 15.0 | 27 | 16.3 | 10.5 | 27* | 20.1 | 23 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 17.2 | 77 | 27 | 30 | |
| 上旬 | 19.9 | 23.5 | 27.7 | 08 | 17.9 | 04 | 15.7 | 10.6 | 04 | 20.6 | 07 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 17.3 | 73 | 42 | 10 | |
| 中旬 | 20.2 | 24.7 | 29.2 | 13 | 17.9 | 11 | 16.5 | 11.8 | 12 | 20.7 | 18 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 16.4 | 69 | 25 | 16 | |
| 下旬 | 21.4 | 25.5 | 29.3 | 21 | 20.2 | 26 | 17.9 | 13.8 | 26 | 20.8 | 31 | 0 | 0 | 0 | 0 | 0 | 8 | 0 | 0 | 17.6 | 70 | 16 | 31 | |
| 上旬 | 19.2 | 22.0 | 27.9 | 04 | 17.1 | 06 | 16.1 | 13.8 | 07 | 18.2 | 01 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 16.5 | 75 | 30 | 01 | |
| 中旬 | 21.9 | 25.2 | 31.7 | 20 | 19.4 | 14 | 19.1 | 16.4 | 14 | 23.6 | 20 | 0 | 1 | 0 | 0 | 0 | 6 | 1 | 0 | 20.3 | 78 | 35 | 20 | |
| 下旬 | 23.4 | 26.6 | 33.7 | 27 | 18.2 | 22 | 20.3 | 15.0 | 24 | 26.4 | 27 | 0 | 4 | 0 | 2 | 0 | 5 | 3 | 0 | 21.9 | 76 | 48 | 30* | |
| 上旬 | 28.2 | 32.1 | 36.1 | 04 | 28.9 | 10 | 25.3 | 22.7 | 10 | 26.8 | 04 | 0 | 10 | 0 | 8 | 0 | 10 | 8 | 2 | 27.5 | 72 | 38 | 04 | |
| 中旬 | 21.9 | 25.1 | 30.1 | 11 | 20.5 | 16 | 19.2 | 17.0 | 13 | 22.6 | 20 | 0 | 2 | 0 | 0 | 0 | 5 | 1 | 0 | 20.1 | 76 | 51 | 20* | |
| 下旬 | 25.7 | 29.6 | 32.5 | 29* | 24.4 | 22 | 23.2 | 20.1 | 22 | 26.6 | 28 | 0 | 8 | 0 | 4 | 0 | 10 | 5 | 0 | 26.5 | 80 | 54 | 21 | |
| 上旬 | 26.8 | 30.7 | 34.1 | 02 | 24.0 | 09 | 24.1 | 20.3 | 09 | 27.4 | 03 | 0 | 8 | 0 | 5 | 0 | 9 | 7 | 0 | 27.4 | 78 | 48 | 04 | |
| 中旬 | 28.0 | 31.8 | 35.5 | 16 | 28.2 | 19 | 24.9 | 22.9 | 19 | 26.2 | 13 | 0 | 10 | 0 | 5 | 0 | 10 | 8 | 1 | 28.4 | 76 | 51 | 16* | |
| 下旬 | 27.0 | 30.4 | 33.6 | 25 | 26.7 | 31 | 24.3 | 20.9 | 31 | 27.4 | 26 | 0 | 9 | 0 | 4 | 0 | 11 | 7 | 0 | 28.1 | 79 | 51 | 25 | |
| 上旬 | 23.9 | 27.0 | 30.8 | 10 | 22.8 | 07 | 21.6 | 20.2 | 08 | 22.5 | 10 | 0 | 2 | 0 | 0 | 0 | 9 | 1 | 0 | 21.8 | 74 | 41 | 10 | |
| 中旬 | 25.5 | 29.5 | 32.8 | 16 | 24.0 | 18 | 22.3 | 20.5 | 18 | 24.4 | 20 | 0 | 9 | 0 | 0 | 0 | 9 | 5 | 0 | 23.9 | 74 | 36 | 11 | |
| 下旬 | 23.8 | 26.4 | 30.8 | 25 | 20.6 | 27 | 21.8 | 17.7 | 28* | 25.2 | 22* | 0 | 5 | 0 | 3 | 0 | 6 | 1 | 0 | 24.7 | 84 | 54 | 25 | |
| 上旬 | 22.2 | 25.7 | 31.9 | 02 | 20.5 | 06 | 19.6 | 17.1 | 06 | 21.2 | 03 | 0 | 1 | 0 | 0 | 0 | 6 | 1 | 0 | 18.7 | 71 | 31 | 04 | |
| 中旬 | 21.2 | 24.5 | 28.3 | 19 | 20.8 | 17 | 17.7 | 15.4 | 12 | 22.2 | 15 | 0 | 1 | 0 | 0 | 0 | 4 | 0 | 0 | 18.9 | 74 | 34 | 11 | |
| 下旬 | 17.3 | 20.7 | 24.8 | 31 | 15.9 | 24 | 14.2 | 11.9 | 25 | 17.2 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13.4 | 68 | 33 | 25 | |
| 上旬 | 16.7 | 20.1 | 25.0 | 09 | 15.0 | 07* | 13.6 | 10.6 | 08 | 17.1 | 01 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 11.3 | 60 | 20 | 09 | |
| 中旬 | 14.1 | 18.4 | 23.8 | 17 | 13.3 | 20 | 9.9 | 5.3 | 20 | 13.6 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.4 | 51 | 21 | 17 | |
| 下旬 | 10.8 | 14.6 | 19.1 | 28 | 10.3 | 22 | 7.4 | 5.8 | 23 | 9.1 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.8 | 53 | 27 | 28 | |
| 上旬 | 9.1 | 11.8 | 17.6 | 01 | 6.3 | 03 | 6.3 | 2.4 | 03 | 9.7 | 08 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.1 | 70 | 34 | 09 | |
| 中旬 | 9.4 | 13.6 | 18.4 | 17 | 9.5 | 12 | 5.5 | 3.3 | 13 | 8.2 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.4 | 54 | 23 | 17 | |
| 下旬 | 8.4 | 12.4 | 15.2 | 22 | 9.9 | 31 | 4.8 | 2.9 | 31 | 6.4 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.3 | 48 | 26 | 21 | |