{"city":"Billings","country":"United States","lat":45.78329086303711,"lon":-108.50068664550781,"range":"48h","license":"CC BY 4.0","source":"https://cerns.io","hourly":[{"datetime_utc":"2026-07-20T02:00:00Z","aqi":40,"aqi_min":40,"aqi_max":40,"pm25":9.72,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T03:00:00Z","aqi":53,"aqi_min":53,"aqi_max":53,"pm25":13.16,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T04:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.79,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T05:00:00Z","aqi":63,"aqi_min":63,"aqi_max":63,"pm25":17.7,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T06:00:00Z","aqi":68,"aqi_min":68,"aqi_max":68,"pm25":20.44,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T07:00:00Z","aqi":71,"aqi_min":71,"aqi_max":71,"pm25":21.54,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T08:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.07,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T09:00:00Z","aqi":69,"aqi_min":69,"aqi_max":69,"pm25":20.74,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T10:00:00Z","aqi":68,"aqi_min":68,"aqi_max":68,"pm25":20.34,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T11:00:00Z","aqi":67,"aqi_min":67,"aqi_max":67,"pm25":19.53,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T12:00:00Z","aqi":67,"aqi_min":67,"aqi_max":67,"pm25":19.57,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T13:00:00Z","aqi":68,"aqi_min":68,"aqi_max":68,"pm25":20.16,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T14:00:00Z","aqi":72,"aqi_min":72,"aqi_max":72,"pm25":22.29,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T15:00:00Z","aqi":74,"aqi_min":74,"aqi_max":74,"pm25":22.86,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T16:00:00Z","aqi":77,"aqi_min":77,"aqi_max":77,"pm25":24.62,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T17:00:00Z","aqi":81,"aqi_min":81,"aqi_max":81,"pm25":26.38,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T18:00:00Z","aqi":84,"aqi_min":84,"aqi_max":84,"pm25":27.89,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T19:00:00Z","aqi":84,"aqi_min":84,"aqi_max":84,"pm25":27.69,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T20:00:00Z","aqi":81,"aqi_min":81,"aqi_max":81,"pm25":26.41,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T21:00:00Z","aqi":79,"aqi_min":79,"aqi_max":79,"pm25":25.49,"pm10":null,"stations":1},{"datetime_utc":"2026-07-20T23:00:00Z","aqi":97,"aqi_min":97,"aqi_max":97,"pm25":33.95,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T00:00:00Z","aqi":95,"aqi_min":95,"aqi_max":95,"pm25":32.88,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T01:00:00Z","aqi":81,"aqi_min":81,"aqi_max":81,"pm25":26.42,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T02:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.12,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T03:00:00Z","aqi":66,"aqi_min":66,"aqi_max":66,"pm25":19.06,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T04:00:00Z","aqi":67,"aqi_min":67,"aqi_max":67,"pm25":19.86,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T05:00:00Z","aqi":69,"aqi_min":69,"aqi_max":69,"pm25":20.62,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T06:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":21.22,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T07:00:00Z","aqi":70,"aqi_min":70,"aqi_max":70,"pm25":20.91,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T08:00:00Z","aqi":69,"aqi_min":69,"aqi_max":69,"pm25":20.45,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T09:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.66,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T10:00:00Z","aqi":63,"aqi_min":63,"aqi_max":63,"pm25":17.73,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T11:00:00Z","aqi":60,"aqi_min":60,"aqi_max":60,"pm25":16.35,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T12:00:00Z","aqi":60,"aqi_min":60,"aqi_max":60,"pm25":16.48,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T14:00:00Z","aqi":56,"aqi_min":56,"aqi_max":56,"pm25":14.7,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T15:00:00Z","aqi":59,"aqi_min":59,"aqi_max":59,"pm25":15.93,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T16:00:00Z","aqi":61,"aqi_min":61,"aqi_max":61,"pm25":16.83,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T17:00:00Z","aqi":61,"aqi_min":61,"aqi_max":61,"pm25":16.95,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T18:00:00Z","aqi":60,"aqi_min":60,"aqi_max":60,"pm25":16.27,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T19:00:00Z","aqi":60,"aqi_min":60,"aqi_max":60,"pm25":16.45,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T20:00:00Z","aqi":63,"aqi_min":63,"aqi_max":63,"pm25":17.81,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T21:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.64,"pm10":null,"stations":1},{"datetime_utc":"2026-07-21T22:00:00Z","aqi":65,"aqi_min":65,"aqi_max":65,"pm25":18.94,"pm10":null,"stations":1}],"daily":[{"date":"2026-07-20","aqi_avg":71,"aqi_min":40,"aqi_max":97,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":21.8,"pm10_avg":null,"hours":21,"stations_avg":1},{"date":"2026-07-21","aqi_avg":66,"aqi_min":56,"aqi_max":95,"aqi_color":"#d97706","aqi_label":"Moderate","pm25_avg":19.3,"pm10_avg":null,"hours":22,"stations_avg":1}]}