半旬ごとの値
 |  |
 |  |
 |  |  |  |  |
 |  |  |  |  |  |
 |  |  |  |  |
東京（東京都) 1998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 | 7.6 | 11.3 | 12.7 | 01 | 9.3 | 05 | 4.7 | 3.4 | 01 | 5.5 | 03 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.3 | 60 | 29 | 05 | |
| 第2半旬 | 6～10 | 5.2 | 9.2 | 13.6 | 06 | 5.0 | 08 | 1.7 | 0.4 | 09* | 2.7 | 07* | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4.8 | 57 | 23 | 07 | |
| 第3半旬 | 11～15 | 3.6 | 7.1 | 9.8 | 14 | 4.2 | 12 | 1.2 | 0.0 | 15 | 1.9 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.1 | 79 | 45 | 13 | |
| 第4半旬 | 16～20 | 5.1 | 8.4 | 9.8 | 19 | 6.1 | 17 | 1.4 | -0.7 | 20 | 3.2 | 19 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 6.1 | 70 | 22 | 20 | |
| 第5半旬 | 21～25 | 5.3 | 9.9 | 13.6 | 21 | 7.5 | 23 | 1.1 | -0.2 | 25 | 3.2 | 23 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 4.3 | 49 | 11 | 24 | |
| 第6半旬 | 26～31 | 5.2 | 9.8 | 12.8 | 31 | 8.3 | 29 | 1.2 | -0.8 | 26 | 2.7 | 27 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3.7 | 42 | 19 | 29 | |
| 第1半旬 | 1～ 5 | 6.3 | 9.8 | 11.2 | 03 | 9.1 | 05 | 2.9 | 2.3 | 05 | 3.4 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3.9 | 40 | 19 | 01 | |
| 第2半旬 | 6～10 | 5.9 | 10.8 | 12.5 | 08 | 8.1 | 10 | 2.3 | 0.5 | 10 | 3.0 | 06 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4.8 | 52 | 17 | 09 | |
| 第3半旬 | 11～15 | 8.5 | 14.9 | 23.1 | 14 | 8.1 | 15 | 4.1 | 1.3 | 15 | 7.7 | 14 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.1 | 63 | 20 | 11 | |
| 第4半旬 | 16～20 | 6.9 | 10.9 | 14.2 | 19 | 9.1 | 16 | 3.5 | 2.0 | 18 | 7.1 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.9 | 58 | 25 | 17 | |
| 第5半旬 | 21～25 | 5.9 | 9.0 | 12.5 | 23 | 7.1 | 25 | 3.1 | 1.4 | 22 | 5.1 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.1 | 76 | 42 | 23* | |
| 第6半旬 | 26～28 | 9.6 | 13.3 | 14.5 | 27 | 11.7 | 26 | 7.0 | 5.8 | 26 | 8.0 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.7 | 73 | 50 | 27 | |
| 第1半旬 | 1～ 5 | 7.9 | 12.7 | 16.5 | 04 | 8.2 | 01 | 3.5 | 0.7 | 01 | 7.2 | 04 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 64 | 18 | 04 | |
| 第2半旬 | 6～10 | 7.7 | 12.2 | 16.0 | 09 | 10.2 | 08 | 3.2 | 0.8 | 06 | 4.8 | 09 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.1 | 50 | 17 | 09 | |
| 第3半旬 | 11～15 | 9.8 | 13.3 | 16.7 | 14 | 11.8 | 12 | 6.2 | 3.3 | 11 | 9.3 | 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 58 | 26 | 15 | |
| 第4半旬 | 16～20 | 10.2 | 15.0 | 19.6 | 20 | 11.6 | 16 | 5.3 | 2.8 | 18 | 12.2 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.5 | 48 | 18 | 16 | |
| 第5半旬 | 21～25 | 9.2 | 12.4 | 15.1 | 25 | 7.4 | 22 | 5.8 | 2.6 | 23 | 8.0 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.4 | 65 | 31 | 23 | |
| 第6半旬 | 26～31 | 15.1 | 19.7 | 24.5 | 30 | 16.3 | 27 | 10.6 | 8.8 | 26 | 12.4 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 10.0 | 59 | 18 | 26 | |
| 第1半旬 | 1～ 5 | 9.6 | 13.3 | 20.3 | 05 | 6.7 | 02 | 5.4 | 2.5 | 02 | 9.8 | 05 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.1 | 68 | 25 | 01 | |
| 第2半旬 | 6～10 | 13.9 | 17.2 | 23.4 | 10 | 11.9 | 09 | 10.7 | 8.6 | 09 | 11.9 | 06 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.9 | 84 | 27 | 10 | |
| 第3半旬 | 11～15 | 19.4 | 23.4 | 25.1 | 11 | 20.1 | 12 | 15.6 | 11.6 | 15 | 20.0 | 14 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 17.9 | 78 | 28 | 11 | |
| 第4半旬 | 16～20 | 16.4 | 20.3 | 27.1 | 20 | 14.1 | 17 | 12.8 | 10.7 | 16 | 16.1 | 20 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 13.3 | 73 | 24 | 20 | |
| 第5半旬 | 21～25 | 22.0 | 25.2 | 26.1 | 23 | 23.9 | 25 | 19.0 | 16.9 | 21 | 20.1 | 23 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 19.7 | 75 | 46 | 21 | |
| 第6半旬 | 26～30 | 16.5 | 20.9 | 25.7 | 29 | 15.0 | 27 | 13.7 | 10.5 | 27* | 16.6 | 30* | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 14.8 | 80 | 27 | 30 | |
| 第1半旬 | 1～ 5 | 18.5 | 22.4 | 25.7 | 03 | 17.9 | 04 | 13.4 | 10.6 | 04 | 17.9 | 02 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 16.3 | 74 | 47 | 05* | |
| 第2半旬 | 6～10 | 21.2 | 24.5 | 27.7 | 08 | 20.3 | 09 | 17.9 | 15.7 | 09 | 20.6 | 07 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 18.3 | 72 | 42 | 10 | |
| 第3半旬 | 11～15 | 18.6 | 23.3 | 29.2 | 13 | 17.9 | 11 | 14.7 | 11.8 | 12 | 18.2 | 13 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 14.2 | 66 | 28 | 15 | |
| 第4半旬 | 16～20 | 21.8 | 26.0 | 26.8 | 16 | 24.1 | 19 | 18.3 | 15.7 | 17 | 20.7 | 18 | 0 | 0 | 0 | 0 | 0 | 4 | 0 | 0 | 18.5 | 72 | 25 | 16 | |
| 第5半旬 | 21～25 | 22.8 | 27.4 | 29.3 | 21 | 25.0 | 24 | 18.7 | 17.9 | 24 | 19.4 | 22 | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 18.5 | 68 | 20 | 21 | |
| 第6半旬 | 26～31 | 20.3 | 24.0 | 27.8 | 31 | 20.2 | 26 | 17.3 | 13.8 | 26 | 20.8 | 31 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 16.9 | 73 | 16 | 31 | |
| 第1半旬 | 1～ 5 | 20.9 | 24.3 | 27.9 | 04 | 18.0 | 03 | 16.8 | 15.6 | 03 | 18.2 | 01 | 0 | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 17.0 | 71 | 30 | 01 | |
| 第2半旬 | 6～10 | 17.5 | 19.7 | 22.2 | 08 | 17.1 | 06 | 15.4 | 13.8 | 07 | 17.5 | 10 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 16.0 | 79 | 56 | 08 | |
| 第3半旬 | 11～15 | 19.9 | 22.9 | 29.5 | 15 | 19.4 | 14 | 17.6 | 16.4 | 14 | 19.1 | 15 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 19.2 | 84 | 47 | 15 | |
| 第4半旬 | 16～20 | 24.0 | 27.5 | 31.7 | 20 | 25.8 | 19 | 20.6 | 19.2 | 16 | 23.6 | 20 | 0 | 1 | 0 | 0 | 0 | 5 | 1 | 0 | 21.4 | 73 | 35 | 20 | |
| 第5半旬 | 21～25 | 19.7 | 22.2 | 24.9 | 21 | 18.2 | 22 | 16.7 | 15.0 | 24 | 19.6 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 18.5 | 81 | 48 | 21 | |
| 第6半旬 | 26～30 | 27.0 | 30.9 | 33.7 | 27 | 27.7 | 29 | 23.8 | 21.6 | 30 | 26.4 | 27 | 0 | 4 | 0 | 2 | 0 | 5 | 3 | 0 | 25.3 | 71 | 48 | 30 | |
| 第1半旬 | 1～ 5 | 28.5 | 33.0 | 36.1 | 04 | 30.0 | 01 | 25.7 | 24.3 | 01 | 26.8 | 04 | 0 | 5 | 0 | 4 | 0 | 5 | 5 | 1 | 27.3 | 71 | 38 | 04 | |
| 第2半旬 | 6～10 | 27.9 | 31.3 | 35.2 | 09 | 28.9 | 10 | 25.0 | 22.7 | 10 | 26.0 | 07 | 0 | 5 | 0 | 4 | 0 | 5 | 3 | 1 | 27.7 | 74 | 45 | 09 | |
| 第3半旬 | 11～15 | 21.6 | 25.0 | 30.1 | 11 | 22.1 | 13 | 18.8 | 17.0 | 13 | 22.4 | 11 | 0 | 1 | 0 | 0 | 0 | 2 | 1 | 0 | 19.3 | 74 | 52 | 11 | |
| 第4半旬 | 16～20 | 22.3 | 25.3 | 28.0 | 20 | 20.5 | 16 | 19.6 | 17.8 | 17 | 22.6 | 20 | 0 | 1 | 0 | 0 | 0 | 3 | 0 | 0 | 20.8 | 78 | 51 | 20* | |
| 第5半旬 | 21～25 | 24.3 | 27.9 | 30.8 | 23 | 24.4 | 22 | 21.7 | 20.1 | 22 | 23.9 | 25 | 0 | 3 | 0 | 0 | 0 | 4 | 1 | 0 | 24.5 | 81 | 54 | 21 | |
| 第6半旬 | 26～31 | 26.9 | 30.9 | 32.5 | 29* | 28.5 | 31 | 24.4 | 21.7 | 31 | 26.6 | 28 | 0 | 5 | 0 | 4 | 0 | 6 | 4 | 0 | 28.3 | 80 | 59 | 28 | |
| 第1半旬 | 1～ 5 | 28.4 | 32.5 | 34.1 | 02 | 30.3 | 01 | 25.4 | 23.1 | 01 | 27.4 | 03 | 0 | 5 | 0 | 4 | 0 | 5 | 5 | 0 | 29.5 | 77 | 48 | 04 | |
| 第2半旬 | 6～10 | 25.3 | 28.9 | 33.2 | 07 | 24.0 | 09 | 22.7 | 20.3 | 09 | 25.6 | 06 | 0 | 3 | 0 | 1 | 0 | 4 | 2 | 0 | 25.2 | 78 | 50 | 07 | |
| 第3半旬 | 11～15 | 28.0 | 31.4 | 34.1 | 13 | 30.1 | 15 | 25.2 | 24.5 | 11 | 26.2 | 13 | 0 | 5 | 0 | 2 | 0 | 5 | 5 | 0 | 28.5 | 76 | 51 | 13 | |
| 第4半旬 | 16～20 | 28.0 | 32.2 | 35.5 | 16 | 28.2 | 19 | 24.7 | 22.9 | 19 | 25.7 | 16 | 0 | 5 | 0 | 3 | 0 | 5 | 3 | 1 | 28.2 | 76 | 51 | 16 | |
| 第5半旬 | 21～25 | 27.4 | 31.1 | 33.6 | 25 | 27.9 | 22 | 24.6 | 23.1 | 23 | 26.3 | 25 | 0 | 5 | 0 | 2 | 0 | 5 | 4 | 0 | 26.6 | 73 | 51 | 25 | |
| 第6半旬 | 26～31 | 26.6 | 29.8 | 32.9 | 26 | 26.7 | 31 | 24.0 | 20.9 | 31 | 27.4 | 26 | 0 | 4 | 0 | 2 | 0 | 6 | 3 | 0 | 29.3 | 84 | 56 | 26 | |
| 第1半旬 | 1～ 5 | 23.8 | 26.7 | 27.2 | 05 | 25.9 | 02 | 21.8 | 21.4 | 04 | 21.9 | 03* | 0 | 0 | 0 | 0 | 0 | 5 | 0 | 0 | 22.0 | 75 | 57 | 05 | |
| 第2半旬 | 6～10 | 24.0 | 27.3 | 30.8 | 10 | 22.8 | 07 | 21.4 | 20.2 | 08 | 22.5 | 10 | 0 | 2 | 0 | 0 | 0 | 4 | 1 | 0 | 21.5 | 74 | 41 | 10 | |
| 第3半旬 | 11～15 | 25.3 | 29.4 | 30.7 | 13 | 27.9 | 15 | 22.4 | 21.4 | 15 | 23.3 | 12 | 0 | 5 | 0 | 0 | 0 | 5 | 2 | 0 | 23.0 | 72 | 36 | 11 | |
| 第4半旬 | 16～20 | 25.7 | 29.6 | 32.8 | 16 | 24.0 | 18 | 22.2 | 20.5 | 18 | 24.4 | 20 | 0 | 4 | 0 | 0 | 0 | 4 | 3 | 0 | 24.8 | 76 | 45 | 17 | |
| 第5半旬 | 21～25 | 26.6 | 29.4 | 30.8 | 25 | 27.3 | 23 | 24.5 | 22.7 | 24 | 25.2 | 22* | 0 | 5 | 0 | 3 | 0 | 5 | 1 | 0 | 27.9 | 81 | 54 | 25 | |
| 第6半旬 | 26～30 | 21.0 | 23.4 | 26.5 | 26 | 20.6 | 27 | 19.1 | 17.7 | 28* | 20.6 | 29 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 21.5 | 87 | 70 | 28 | |
| 第1半旬 | 1～ 5 | 22.8 | 26.3 | 31.9 | 02 | 22.0 | 01 | 20.1 | 18.5 | 05 | 21.2 | 03 | 0 | 1 | 0 | 0 | 0 | 3 | 1 | 0 | 18.8 | 69 | 31 | 04 | |
| 第2半旬 | 6～10 | 21.6 | 25.0 | 28.9 | 08 | 20.5 | 06 | 19.1 | 17.1 | 06 | 20.3 | 08 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 18.6 | 73 | 36 | 09 | |
| 第3半旬 | 11～15 | 20.7 | 23.9 | 27.9 | 15 | 22.5 | 12 | 17.5 | 15.4 | 12 | 22.2 | 15 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 17.6 | 72 | 34 | 11 | |
| 第4半旬 | 16～20 | 21.8 | 25.2 | 28.3 | 19 | 20.8 | 17 | 18.0 | 15.7 | 17 | 20.7 | 16 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | 0 | 20.1 | 77 | 35 | 19 | |
| 第5半旬 | 21～25 | 16.1 | 19.3 | 23.5 | 25 | 15.9 | 24 | 13.4 | 11.9 | 25 | 14.4 | 23 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.9 | 72 | 33 | 25 | |
| 第6半旬 | 26～31 | 18.3 | 21.9 | 24.8 | 31 | 16.9 | 27 | 14.9 | 12.7 | 27 | 17.2 | 31 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 13.8 | 65 | 35 | 28 | |
| 第1半旬 | 1～ 5 | 18.1 | 21.3 | 24.0 | 03 | 17.6 | 02 | 15.4 | 13.4 | 05 | 17.1 | 01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 12.9 | 62 | 30 | 05 | |
| 第2半旬 | 6～10 | 15.3 | 18.9 | 25.0 | 09 | 15.0 | 07* | 11.9 | 10.6 | 08 | 13.9 | 10 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 9.7 | 57 | 20 | 09 | |
| 第3半旬 | 11～15 | 14.3 | 19.1 | 22.2 | 14 | 16.9 | 13* | 10.4 | 8.2 | 13 | 11.5 | 15* | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.6 | 53 | 23 | 12 | |
| 第4半旬 | 16～20 | 13.9 | 17.8 | 23.8 | 17 | 13.3 | 20 | 9.4 | 5.3 | 20 | 13.6 | 17 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.2 | 50 | 21 | 17 | |
| 第5半旬 | 21～25 | 10.4 | 14.2 | 15.4 | 25 | 10.3 | 22 | 6.9 | 5.8 | 23 | 8.6 | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.6 | 53 | 28 | 25 | |
| 第6半旬 | 26～30 | 11.2 | 14.9 | 19.1 | 28 | 12.5 | 29 | 7.9 | 6.4 | 27 | 9.1 | 28 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.0 | 53 | 27 | 28 | |
| 第1半旬 | 1～ 5 | 8.3 | 11.4 | 17.6 | 01 | 6.3 | 03 | 4.9 | 2.4 | 03 | 8.1 | 01 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 8.3 | 75 | 40 | 04 | |
| 第2半旬 | 6～10 | 10.0 | 12.2 | 13.9 | 06 | 9.9 | 07 | 7.7 | 5.3 | 10 | 9.7 | 08 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 7.9 | 65 | 34 | 09 | |
| 第3半旬 | 11～15 | 8.8 | 12.7 | 15.5 | 15 | 9.5 | 12 | 4.7 | 3.3 | 13 | 7.2 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.4 | 56 | 35 | 14 | |
| 第4半旬 | 16～20 | 10.0 | 14.5 | 18.4 | 17 | 12.5 | 18 | 6.3 | 5.3 | 19 | 8.2 | 16 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6.3 | 51 | 23 | 17 | |
| 第5半旬 | 21～25 | 9.0 | 12.5 | 15.2 | 22 | 10.3 | 25 | 5.6 | 4.5 | 22 | 6.4 | 24 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.5 | 47 | 26 | 21 | |
| 第6半旬 | 26～31 | 8.0 | 12.3 | 13.9 | 26 | 9.9 | 31 | 4.2 | 2.9 | 31 | 4.7 | 30 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 5.2 | 49 | 27 | 31 | |