{"metadata":{"title":"Tyndall, SD Monthly Climate Normals","page_url":"https://plainclimate.com/city/tyndall-sd","primary_station_id":"USC00398472","source":"NOAA 1991-2020 U.S. Climate Normals","source_url":"https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals","vintage":"2026-08-04","license":"CC0 1.0","license_url":"https://creativecommons.org/publicdomain/zero/1.0/","citation":"PlainClimate, \"Tyndall, SD Climate Normals\". https://plainclimate.com/city/tyndall-sd","row_count":12},"annual_summary":{"city_slug":"tyndall-sd","ann_tavg":47.3,"ann_tmax":58.6,"ann_tmin":36,"ann_prcp":26.24,"ann_snow":36.6,"ann_htdd":7255.8,"ann_cldd":833.4,"frost_first":"10/07","frost_last":"05/01","growing_season":159,"warmest_month":7,"coldest_month":1,"wettest_month":5,"driest_month":1,"snowiest_month":2,"comfort_score":59},"data":[{"month":"January","month_number":1,"avg_temp_f":18.8,"avg_high_f":28.9,"avg_low_f":8.7,"precip_in":0.57,"snow_in":6.5,"heating_degree_days":1432,"cooling_degree_days":0,"days_with_precip":5.4,"days_with_snow":4.1,"days_freezing":30.7,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"February","month_number":2,"avg_temp_f":23.3,"avg_high_f":34,"avg_low_f":12.5,"precip_in":0.81,"snow_in":7.4,"heating_degree_days":1168.9,"cooling_degree_days":0,"days_with_precip":5.4,"days_with_snow":3.9,"days_freezing":26.8,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"March","month_number":3,"avg_temp_f":34.5,"avg_high_f":45.9,"avg_low_f":23.1,"precip_in":1.35,"snow_in":5.3,"heating_degree_days":946.1,"cooling_degree_days":0.5,"days_with_precip":6.6,"days_with_snow":2.8,"days_freezing":24.1,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"April","month_number":4,"avg_temp_f":46.2,"avg_high_f":58.2,"avg_low_f":34.3,"precip_in":2.86,"snow_in":4.1,"heating_degree_days":565.7,"cooling_degree_days":3.2,"days_with_precip":9,"days_with_snow":1.3,"days_freezing":11,"days_90f_plus":0.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"May","month_number":5,"avg_temp_f":58.5,"avg_high_f":69.9,"avg_low_f":47,"precip_in":3.96,"snow_in":0.2,"heating_degree_days":245.5,"cooling_degree_days":42.3,"days_with_precip":11.2,"days_with_snow":0.1,"days_freezing":1.1,"days_90f_plus":1.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":69.4,"avg_high_f":80.6,"avg_low_f":58.3,"precip_in":3.39,"snow_in":0,"heating_degree_days":39.3,"cooling_degree_days":172.7,"days_with_precip":10.4,"days_with_snow":0,"days_freezing":0,"days_90f_plus":4.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":74.4,"avg_high_f":85.8,"avg_low_f":62.9,"precip_in":3.33,"snow_in":0,"heating_degree_days":6.1,"cooling_degree_days":295.8,"days_with_precip":7.7,"days_with_snow":0,"days_freezing":0,"days_90f_plus":9.6,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":71.9,"avg_high_f":83.4,"avg_low_f":60.3,"precip_in":3.27,"snow_in":0,"heating_degree_days":14.8,"cooling_degree_days":227,"days_with_precip":8.8,"days_with_snow":0,"days_freezing":0,"days_90f_plus":6.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":63.4,"avg_high_f":76.1,"avg_low_f":50.6,"precip_in":2.7,"snow_in":0,"heating_degree_days":134.6,"cooling_degree_days":84.9,"days_with_precip":7,"days_with_snow":0,"days_freezing":0.2,"days_90f_plus":3.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":49.2,"avg_high_f":61.7,"avg_low_f":36.7,"precip_in":2.21,"snow_in":0.8,"heating_degree_days":496.8,"cooling_degree_days":7,"days_with_precip":6.9,"days_with_snow":0.5,"days_freezing":8.7,"days_90f_plus":0.3,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":34.7,"avg_high_f":45.8,"avg_low_f":23.7,"precip_in":1.01,"snow_in":5,"heating_degree_days":907.5,"cooling_degree_days":0,"days_with_precip":4.7,"days_with_snow":1.7,"days_freezing":23.6,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"December","month_number":12,"avg_temp_f":23.1,"avg_high_f":32.7,"avg_low_f":13.5,"precip_in":0.78,"snow_in":7.3,"heating_degree_days":1298.7,"cooling_degree_days":0,"days_with_precip":5.3,"days_with_snow":3.7,"days_freezing":30.6,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}