{"metadata":{"title":"Roy Lake, SD Monthly Climate Normals","page_url":"https://plainclimate.com/city/roy-lake-sd","primary_station_id":"USC00397326","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, \"Roy Lake, SD Climate Normals\". https://plainclimate.com/city/roy-lake-sd","row_count":12},"annual_summary":{"city_slug":"roy-lake-sd","ann_tavg":43.5,"ann_tmax":53.3,"ann_tmin":33.7,"ann_prcp":24.99,"ann_snow":48.1,"ann_htdd":8416.9,"ann_cldd":619,"frost_first":"10/09","frost_last":"05/02","growing_season":160,"warmest_month":7,"coldest_month":1,"wettest_month":7,"driest_month":1,"snowiest_month":12,"comfort_score":49},"data":[{"month":"January","month_number":1,"avg_temp_f":12.1,"avg_high_f":21.6,"avg_low_f":2.6,"precip_in":0.55,"snow_in":6.6,"heating_degree_days":1639.7,"cooling_degree_days":0,"days_with_precip":5,"days_with_snow":4.8,"days_freezing":30.9,"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":15.4,"avg_high_f":25.6,"avg_low_f":5.2,"precip_in":0.63,"snow_in":9.2,"heating_degree_days":1388.8,"cooling_degree_days":0,"days_with_precip":5.1,"days_with_snow":4.9,"days_freezing":27.8,"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":27.7,"avg_high_f":37.8,"avg_low_f":17.6,"precip_in":0.98,"snow_in":7,"heating_degree_days":1156.4,"cooling_degree_days":0,"days_with_precip":4.9,"days_with_snow":3,"days_freezing":28.5,"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":42.4,"avg_high_f":53,"avg_low_f":31.9,"precip_in":2.06,"snow_in":7.2,"heating_degree_days":676.7,"cooling_degree_days":0.2,"days_with_precip":6.9,"days_with_snow":2.1,"days_freezing":16.4,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"May","month_number":5,"avg_temp_f":56.4,"avg_high_f":66.9,"avg_low_f":45.9,"precip_in":3.15,"snow_in":0.2,"heating_degree_days":290.7,"cooling_degree_days":24.1,"days_with_precip":10.6,"days_with_snow":0.3,"days_freezing":3.2,"days_90f_plus":0.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":67.1,"avg_high_f":76.4,"avg_low_f":57.7,"precip_in":4.27,"snow_in":0,"heating_degree_days":58.6,"cooling_degree_days":119.9,"days_with_precip":11.2,"days_with_snow":0,"days_freezing":0,"days_90f_plus":0.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":72,"avg_high_f":81.8,"avg_low_f":62.2,"precip_in":4.41,"snow_in":0,"heating_degree_days":12.1,"cooling_degree_days":229.1,"days_with_precip":8.5,"days_with_snow":0,"days_freezing":0,"days_90f_plus":1.9,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":70.3,"avg_high_f":80.5,"avg_low_f":60.2,"precip_in":2.62,"snow_in":0,"heating_degree_days":18.8,"cooling_degree_days":184.5,"days_with_precip":7.9,"days_with_snow":0,"days_freezing":0,"days_90f_plus":1.3,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":61.3,"avg_high_f":71.7,"avg_low_f":51,"precip_in":2.5,"snow_in":0,"heating_degree_days":167.4,"cooling_degree_days":57.8,"days_with_precip":7.6,"days_with_snow":0,"days_freezing":0.5,"days_90f_plus":0.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":47.1,"avg_high_f":56.8,"avg_low_f":37.3,"precip_in":2.21,"snow_in":2.5,"heating_degree_days":559.9,"cooling_degree_days":3.5,"days_with_precip":7.2,"days_with_snow":1.2,"days_freezing":11.2,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":31.5,"avg_high_f":40.1,"avg_low_f":23,"precip_in":0.85,"snow_in":4.3,"heating_degree_days":1003.5,"cooling_degree_days":0,"days_with_precip":3.8,"days_with_snow":2.3,"days_freezing":24.9,"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":18.4,"avg_high_f":27.2,"avg_low_f":9.6,"precip_in":0.76,"snow_in":11.1,"heating_degree_days":1444.5,"cooling_degree_days":0,"days_with_precip":5.5,"days_with_snow":5.7,"days_freezing":30.9,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}