{"destination_name":"Charleston","destination_slug":"charleston","month_name":"May","month_num":5,"buckets":[{"half":1,"half_label":"Early May","pct_clear":44,"avg_high_f":78,"n_days":120},{"half":2,"half_label":"Late May","pct_clear":31,"avg_high_f":82,"n_days":128}],"month_pct_clear":37,"avg_high_f":80,"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://sunnydays.thedigitalcarpenter.com/destinations/charleston/may","month_hub_url":"https://sunnydays.thedigitalcarpenter.com/warm-in/may"}