日ごとの値
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茨城県 1998年12月（日ごとの値） 最高気温（℃）
| 日 | 北茨城 | 大子 | 笠間 | 水戸* | 古河 | 下妻 | 土浦 | 鹿嶋 | 日立 | 龍ケ崎 | 筑波山 | 鉾田 | 常陸大宮 | つくば（館野）* |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 16.5 | 18.8 | 19.0 | 18.6 | 18.4 | 17.5 | 17.3 | 16.7 | 19.5 | 17.6 | 15.0 | 17.8 | 19.7 | 17.2 |
| 2 | 9.7 | 7.6 | 8.2 | 10.4 | 9.8 | 9.3 | 10.9 | 12.2 | 10.1 | 10.6 | 5.0 | 11.8 | 8.0 | 11.0 |
| 3 | 7.2 | 6.0 | 4.9 | 5.8 | 5.3 | 4.9 | 5.3 | 7.5 | 6.6 | 5.1 | -0.5 | 5.0 | 5.1 | 5.1 |
| 4 | 8.0 | 9.2 | 8.2 | 8.8 | 8.0 | 7.9 | 8.0 | 9.2 | 8.3 | 8.8 | 1.8 | 8.5 | 9.9 | 8.5 |
| 5 | 11.2 | 5.4 | 9.0 | 9.2 | 8.1 | 7.7 | 8.0 | 9.7 | 10.7 | 8.2 | 7.4 | 9.2 | 7.8 | 8.0 |
| 6 | 11.4 | 10.4 | 12.8 | 12.8 | 13.3 | 12.9 | 12.2 | 12.6 | 11.6 | 13.5 | 7.3 | 12.3 | 11.4 | 14.0 |
| 7 | 10.4 | 6.0 | 7.6 | 8.9 | 8.5 | 7.9 | 8.0 | 11.8 | 12.2 | 7.8 | 9.1 | 9.8 | 7.5 | 8.2 |
| 8 | 12.7 | 10.2 | 12.1 | 11.8 | 11.9 | 11.8 | 12.7 | 12.5 | 13.0 | 12.3 | 9.7 | 11.8 | 10.9 | 12.2 |
| 9 | 10.6 | 11.4 | 12.1 | 11.7 | 12.5 | 11.2 | 11.4 | 12.5 | 10.7 | 11.5 | 7.3 | 11.2 | 11.2 | 12.0 |
| 10 | 8.1 | 9.1 | 9.3 | 9.5 | 9.7 | 8.3 | 8.4 | 9.7 | 9.7 | 8.9 | 3.4 | 8.4 | 8.7 | 8.8 |
| 11 | 11.5 | 10.1 | 10.3 | 10.7 | 10.5 | 9.8 | 10.0 | 9.9 | 11.4 | 10.1 | 6.9 | 10.5 | 10.7 | 10.1 |
| 12 | 9.3 | 9.6 | 9.5 | 10.2 | 9.4 | 8.7 | 8.8 | 8.3 | 10.1 | 8.0 | 3.7 | 9.2 | 9.8 | 8.9 |
| 13 | 12.4 | 11.8 | 12.3 | 12.5 | 11.2 | 10.8 | 11.6 | 11.7 | 13.2 | 11.7 | 10.0 | 12.2 | 13.6 | 11.4 |
| 14 | 15.2 | 14.4 | 16.3 | 16.3 | 15.2 | 14.7 | 14.6 | 14.6 | 16.4 | 14.3 | 13.1 | 15.3 | 16.9 | 14.9 |
| 15 | 13.6 | 13.4 | 14.7 | 14.5 | 13.9 | 14.8 | 13.9 | 14.4 | 14.1 | 15.0 | 10.5 | 14.5 | 14.5 | 14.7 |
| 16 | 14.8 | 13.2 | 13.3 | 13.5 | 12.6 | 12.3 | 11.7 | 11.0 | 14.4 | 11.3 | 9.2 | 12.8 | 14.1 | 11.8 |
| 17 | 14.4 | 14.6 | 16.1 | 16.5 | 16.4 | 16.2 | 16.5 | 15.6 | 16.1 | 16.4 | 9.9 | 15.7 | 15.0 | 17.1 |
| 18 | 10.3 | 11.0 | 11.6 | 11.2 | 10.9 | 10.7 | 10.6 | 11.0 | 10.2 | 11.2 | 7.8 | 11.1 | 12.1 | 11.2 |
| 19 | 13.7 | 14.7 | 13.8 | 14.2 | 12.7 | 12.8 | 13.4 | 12.8 | 14.9 | 13.4 | 13.1 | 13.5 | 14.8 | 13.1 |
| 20 | 9.0 | 9.6 | 13.0 | 12.7 | 12.6 | 12.5 | 13.4 | 12.9 | 11.5 | 13.2 | 8.0 | 13.5 | 10.7 | 13.9 |
| 21 | 8.8 | 9.1 | 10.4 | 10.7 | 10.7 | 10.6 | 10.9 | 9.8 | 10.5 | 10.7 | 4.6 | 10.4 | 9.5 | 11.5 |
| 22 | 12.7 | 11.2 | 12.8 | 12.7 | 12.6 | 13.0 | 13.8 | 12.8 | 12.1 | 14.2 | 8.2 | 13.0 | 12.1 | 13.7 |
| 23 | 10.5 | 10.2 | 12.3 | 12.3 | 13.5 | 13.5 | 12.7 | 13.0 | 11.6 | 13.7 | 8.3 | 12.4 | 13.7 | 13.5 |
| 24 | 7.7 | 8.5 | 10.0 | 10.4 | 9.9 | 9.9 | 10.5 | 10.5 | 10.0 | 10.6 | 3.3 | 10.1 | 8.8 | 11.3 |
| 25 | 9.9 | 9.1 | 9.3 | 9.9 | 9.8 | 9.8 | 10.2 | 10.0 | 9.8 | 9.9 | 6.8 | 10.4 | 10.8 | 9.9 |
| 26 | 10.7 | 11.2 | 13.2 | 13.8 | 13.0 | 12.4 | 13.0 | 12.8 | 12.6 | 13.3 | 7.0 | 12.8 | 11.5 | 13.9 |
| 27 | 10.3 | 9.6 | 10.2 | 10.7 | 8.5 | 9.2 | 10.0 | 10.2 | 10.0 | 9.7 | 5.0 | 10.8 | 9.7 | 9.9 |
| 28 | 12.4 | 11.7 | 12.3 | 12.4 | 12.1 | 12.2 | 11.7 | 12.1 | 11.7 | 12.5 | 6.3 | 12.0 | 13.2 | 12.4 |
| 29 | 13.3 | 12.9 | 12.9 | 14.0 | 11.9 | 11.7 | 12.9 | 13.9 | 13.2 | 12.6 | 7.5 | 14.4 | 13.7 | 12.5 |
| 30 | 11.3 | 11.8 | 12.8 | 14.4 | 12.7 | 13.3 | 13.3 | 12.9 | 13.0 | 12.6 | 8.5 | 13.1 | 13.2 | 13.8 |
| 31 | 6.5 | 6.7 | 8.3 | 8.7 | 9.1 | 9.0 | 9.1 | 8.0 | 7.9 | 8.5 | 3.5 | 7.9 | 7.2 | 8.7 |
- 値欄の記号の説明
- アスタリスク(*)が付いた地点は地上気象観測地点(気象台・測候所・特別地域気象観測所等)です。
- アスタリスクの付いていない地点はアメダス地点です。2021年3月2日より、アメダスの日照時間は「推計気象分布（日照時間）」から得る推計値となりましたので、日照計による観測値と単純比較できません。詳しくは要素ごとの値の補足説明をご覧ください。