{"metadata":{"title":"Casey, IL Monthly Climate Normals","page_url":"https://plainclimate.com/city/casey-il","primary_station_id":"USC00111329","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, \"Casey, IL Climate Normals\". https://plainclimate.com/city/casey-il","row_count":12},"annual_summary":{"city_slug":"casey-il","ann_tavg":54.1,"ann_tmax":64.8,"ann_tmin":43.3,"ann_prcp":45.54,"ann_snow":11.9,"ann_htdd":5172.9,"ann_cldd":1227.5,"frost_first":"10/20","frost_last":"04/14","growing_season":189,"warmest_month":7,"coldest_month":1,"wettest_month":6,"driest_month":2,"snowiest_month":1,"comfort_score":68},"data":[{"month":"January","month_number":1,"avg_temp_f":28.4,"avg_high_f":37.5,"avg_low_f":19.3,"precip_in":3.25,"snow_in":5,"heating_degree_days":1134,"cooling_degree_days":0,"days_with_precip":8.8,"days_with_snow":2.9,"days_freezing":26.3,"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":32.4,"avg_high_f":42.5,"avg_low_f":22.2,"precip_in":2.6,"snow_in":1.9,"heating_degree_days":913.9,"cooling_degree_days":0,"days_with_precip":8.1,"days_with_snow":2,"days_freezing":21.9,"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":42.6,"avg_high_f":53.2,"avg_low_f":32,"precip_in":3.34,"snow_in":1.4,"heating_degree_days":694.4,"cooling_degree_days":0.1,"days_with_precip":9.5,"days_with_snow":0.7,"days_freezing":16.2,"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":54,"avg_high_f":65.2,"avg_low_f":42.8,"precip_in":5.07,"snow_in":0.1,"heating_degree_days":341.4,"cooling_degree_days":11.4,"days_with_precip":11,"days_with_snow":0,"days_freezing":5.5,"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":64.9,"avg_high_f":75.9,"avg_low_f":53.9,"precip_in":4.48,"snow_in":0,"heating_degree_days":106.1,"cooling_degree_days":102.8,"days_with_precip":12.2,"days_with_snow":0,"days_freezing":0.2,"days_90f_plus":1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":73.4,"avg_high_f":84,"avg_low_f":62.7,"precip_in":5.16,"snow_in":0,"heating_degree_days":5,"cooling_degree_days":255.4,"days_with_precip":11,"days_with_snow":0,"days_freezing":0,"days_90f_plus":7.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":76.7,"avg_high_f":87.7,"avg_low_f":65.7,"precip_in":4.64,"snow_in":0,"heating_degree_days":0.2,"cooling_degree_days":362.7,"days_with_precip":8.2,"days_with_snow":0,"days_freezing":0,"days_90f_plus":12.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":75.2,"avg_high_f":86.3,"avg_low_f":64,"precip_in":3.03,"snow_in":0,"heating_degree_days":1.3,"cooling_degree_days":315.7,"days_with_precip":6.6,"days_with_snow":0,"days_freezing":0,"days_90f_plus":6.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":68.1,"avg_high_f":80.8,"avg_low_f":55.4,"precip_in":3.07,"snow_in":0,"heating_degree_days":52.6,"cooling_degree_days":145.4,"days_with_precip":6.5,"days_with_snow":0,"days_freezing":0,"days_90f_plus":7.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":56.4,"avg_high_f":68.7,"avg_low_f":44.1,"precip_in":3.81,"snow_in":0,"heating_degree_days":298.3,"cooling_degree_days":31.5,"days_with_precip":8.6,"days_with_snow":0,"days_freezing":2.5,"days_90f_plus":0.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":43.8,"avg_high_f":54.1,"avg_low_f":33.4,"precip_in":4.03,"snow_in":0.3,"heating_degree_days":640,"cooling_degree_days":2.6,"days_with_precip":8.4,"days_with_snow":0.2,"days_freezing":15.9,"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":33.2,"avg_high_f":42.1,"avg_low_f":24.3,"precip_in":3.06,"snow_in":3.2,"heating_degree_days":985.5,"cooling_degree_days":0,"days_with_precip":9.3,"days_with_snow":2.1,"days_freezing":23.3,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}