{"metadata":{"title":"Atlantic, IA Monthly Climate Normals","page_url":"https://plainclimate.com/city/atlantic-ia","primary_station_id":"USC00130364","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, \"Atlantic, IA Climate Normals\". https://plainclimate.com/city/atlantic-ia","row_count":12},"annual_summary":{"city_slug":"atlantic-ia","ann_tavg":49.3,"ann_tmax":61.3,"ann_tmin":37.3,"ann_prcp":37.14,"ann_snow":27.3,"ann_htdd":6638.2,"ann_cldd":940.2,"frost_first":"10/02","frost_last":"04/30","growing_season":155,"warmest_month":7,"coldest_month":1,"wettest_month":6,"driest_month":1,"snowiest_month":2,"comfort_score":59},"data":[{"month":"January","month_number":1,"avg_temp_f":20.6,"avg_high_f":31.2,"avg_low_f":9.9,"precip_in":0.86,"snow_in":5.1,"heating_degree_days":1377.8,"cooling_degree_days":0,"days_with_precip":6.1,"days_with_snow":5,"days_freezing":30,"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":24.9,"avg_high_f":36.1,"avg_low_f":13.7,"precip_in":1.14,"snow_in":7.9,"heating_degree_days":1122.7,"cooling_degree_days":0,"days_with_precip":7.2,"days_with_snow":5.2,"days_freezing":26,"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":37.4,"avg_high_f":50,"avg_low_f":24.8,"precip_in":1.89,"snow_in":3.4,"heating_degree_days":856.8,"cooling_degree_days":1.2,"days_with_precip":7.8,"days_with_snow":1.8,"days_freezing":22.8,"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":49.3,"avg_high_f":62.7,"avg_low_f":35.9,"precip_in":3.81,"snow_in":0.5,"heating_degree_days":477.7,"cooling_degree_days":6.8,"days_with_precip":11.5,"days_with_snow":0.8,"days_freezing":10.2,"days_90f_plus":0.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"May","month_number":5,"avg_temp_f":61.2,"avg_high_f":73.1,"avg_low_f":49.3,"precip_in":5.43,"snow_in":0,"heating_degree_days":179.6,"cooling_degree_days":61.8,"days_with_precip":13.6,"days_with_snow":0,"days_freezing":1.1,"days_90f_plus":0.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":71.3,"avg_high_f":82.8,"avg_low_f":59.8,"precip_in":5.74,"snow_in":0,"heating_degree_days":19.2,"cooling_degree_days":208,"days_with_precip":11.6,"days_with_snow":0,"days_freezing":0,"days_90f_plus":4.6,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":74.8,"avg_high_f":86.1,"avg_low_f":63.5,"precip_in":4.4,"snow_in":0,"heating_degree_days":3.3,"cooling_degree_days":307.1,"days_with_precip":10.1,"days_with_snow":0,"days_freezing":0,"days_90f_plus":8.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":72.5,"avg_high_f":84.4,"avg_low_f":60.6,"precip_in":4.44,"snow_in":0,"heating_degree_days":10.7,"cooling_degree_days":243.1,"days_with_precip":8.9,"days_with_snow":0,"days_freezing":0,"days_90f_plus":5.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":64.5,"avg_high_f":78.2,"avg_low_f":50.8,"precip_in":3.35,"snow_in":0,"heating_degree_days":114.2,"cooling_degree_days":99.2,"days_with_precip":8.6,"days_with_snow":0,"days_freezing":1,"days_90f_plus":2.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":51.5,"avg_high_f":65,"avg_low_f":38.1,"precip_in":2.93,"snow_in":0.7,"heating_degree_days":429.9,"cooling_degree_days":12.9,"days_with_precip":8.9,"days_with_snow":0.4,"days_freezing":9.3,"days_90f_plus":0.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":37.3,"avg_high_f":49.2,"avg_low_f":25.4,"precip_in":1.65,"snow_in":2,"heating_degree_days":831.1,"cooling_degree_days":0.1,"days_with_precip":6.4,"days_with_snow":1.5,"days_freezing":21.9,"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":25.8,"avg_high_f":36.3,"avg_low_f":15.3,"precip_in":1.5,"snow_in":7.7,"heating_degree_days":1215.1,"cooling_degree_days":0,"days_with_precip":6.7,"days_with_snow":4.6,"days_freezing":29.4,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}