{"destination_name":"Napa","destination_slug":"napa","month_name":"May","month_num":5,"buckets":[{"half":1,"half_label":"Early May","pct_clear":66,"avg_high_f":76,"n_days":120},{"half":2,"half_label":"Late May","pct_clear":73,"avg_high_f":78,"n_days":128}],"month_pct_clear":70,"avg_high_f":77,"total_n":248,"source":"Open-Meteo ERA5 archive-api, 8 full years (2018–2025), daily temperature_2m_max / precipitation_sum / weathercode","temporal_coverage":"2018/2025","note":"Historical averages only. Not a forecast.","page_url":"https://sunny.day/napa/may","month_hub_url":"https://sunny.day/warm-in/may"}