地点名をタップすると詳細を表示します。右の↗から気象庁のページを開けます。
💡 参考WBGT推定値・参考体感温度の説明
参考WBGT推定値：このページでは気温と湿度だけから簡易推定した「熱中症危険度の目安」を表示します。日射・輻射熱・風速などは反映していないため、公式WBGTとは異なる場合があります。28以上を厳重警戒、31以上を危険の目安としています。
参考体感温度：Steadman系の屋外・日陰条件の式を使い、気温・相対湿度・風速から算出した参考値です。日射、着衣、活動量、個人差などを完全には反映しないため、実際の体感を保証する値ではありません。
| 順位 | 都道府県 | 地点名地点 | 観測値 | 日最高※ | 日最低※ |
|---|---|---|---|---|---|
| 1 | Niigata | 22.5℃ | 25.7℃ | 18.7℃ | |
| 2 | Niigata | 22.4℃ | 24.6℃ | 16.2℃ | |
| 3 | Niigata | 22.4℃ | 25.1℃ | 19.1℃ | |
| 4 | Niigata | 22.3℃ | 25.7℃ | 19.0℃ | |
| 5 | Nagano | 21.9℃ | 23.1℃ | 20.1℃ | |
| 6 | Niigata | 21.8℃ | 24.9℃ | 20.3℃ | |
| 7 | Yamanashi | 21.7℃ | 23.0℃ | 18.8℃ | |
| 8 | Niigata | 21.7℃ | 25.7℃ | 19.0℃ | |
| 9 | Niigata | 21.6℃ | 24.6℃ | 18.9℃ | |
| 10 | Niigata | 21.6℃ | 24.5℃ | 19.1℃ |
How to read and use KION
KION organizes Japan Meteorological Agency AMeDAS observations so you can quickly compare where it is hotter or colder across Japan. Along with current temperature, you can view provisional daily highs and lows, estimated WBGT and apparent temperature for the same station.
Choosing a ranking
Current uses the latest observed temperature, while High and Low show provisional daily extremes. WBGT and Apparent can be switched between highest-first and lowest-first. Filtering by prefecture, region or station name makes it easier to compare conditions around a destination.
Estimated WBGT and apparent temperature
Estimated WBGT is a simplified reference value calculated from the latest observed temperature and humidity. It is not official WBGT and does not include factors such as solar radiation or radiant heat. Apparent temperature uses the latest temperature, humidity and wind speed under an outdoor shaded-condition assumption. Neither value is a weather forecast.
Using nearby Cool Share spots
When you choose to use your location, KION can find the nearest observation station and nearby spots for the current season. By default, cooling shelters and cool spots are shown from April through September, and warm spots from October through March. Official facility-specific operating periods take priority when available. Coordinates and movement history are not stored. Facility information is based on public information from local authorities. Approximate facility locations are clearly marked as approximate. Information may change, so prioritize current on-site guidance and official information from the facility or municipality for opening hours, closures and conditions of use.
Updates and important notes
Current temperature is generally updated about every 10 minutes. Daily highs and lows are provisional values combining accumulated 10-minute observations with values published by the JMA, and missing data or delays can occur. For heat illness, severe weather or other safety decisions, prioritize the latest information from the JMA and other public authorities.