{"metadata":{"title":"Knoxville, IL Monthly Climate Normals","page_url":"https://plainclimate.com/city/knoxville-il","primary_station_id":"USC00114780","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, \"Knoxville, IL Climate Normals\". https://plainclimate.com/city/knoxville-il","row_count":12},"annual_summary":{"city_slug":"knoxville-il","ann_tavg":50.4,"ann_tmax":60.2,"ann_tmin":40.5,"ann_prcp":40.5,"ann_snow":25.4,"ann_htdd":6190.6,"ann_cldd":898.7,"frost_first":"10/20","frost_last":"04/21","growing_season":182,"warmest_month":7,"coldest_month":1,"wettest_month":5,"driest_month":1,"snowiest_month":2,"comfort_score":63},"data":[{"month":"January","month_number":1,"avg_temp_f":23,"avg_high_f":31.6,"avg_low_f":14.3,"precip_in":2.09,"snow_in":6.4,"heating_degree_days":1303.2,"cooling_degree_days":0,"days_with_precip":8.5,"days_with_snow":4.4,"days_freezing":28.8,"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":27.1,"avg_high_f":36.1,"avg_low_f":18.1,"precip_in":2.12,"snow_in":7.7,"heating_degree_days":1061,"cooling_degree_days":0,"days_with_precip":8.7,"days_with_snow":4.2,"days_freezing":26.1,"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":38.6,"avg_high_f":48.8,"avg_low_f":28.5,"precip_in":2.64,"snow_in":3.4,"heating_degree_days":818.1,"cooling_degree_days":1.2,"days_with_precip":10.1,"days_with_snow":1.8,"days_freezing":21.1,"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":50.5,"avg_high_f":61.5,"avg_low_f":39.4,"precip_in":3.95,"snow_in":0.4,"heating_degree_days":442.6,"cooling_degree_days":6.1,"days_with_precip":11.5,"days_with_snow":0.3,"days_freezing":7.8,"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":61.4,"avg_high_f":72,"avg_low_f":50.8,"precip_in":5.54,"snow_in":0,"heating_degree_days":172.5,"cooling_degree_days":60.9,"days_with_precip":13.9,"days_with_snow":0,"days_freezing":0.2,"days_90f_plus":0.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":70.9,"avg_high_f":81.2,"avg_low_f":60.7,"precip_in":4.61,"snow_in":0,"heating_degree_days":17.4,"cooling_degree_days":195.8,"days_with_precip":11.8,"days_with_snow":0,"days_freezing":0,"days_90f_plus":2.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":74.1,"avg_high_f":83.6,"avg_low_f":64.7,"precip_in":4.16,"snow_in":0,"heating_degree_days":3.4,"cooling_degree_days":286.9,"days_with_precip":9.8,"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":"August","month_number":8,"avg_temp_f":72.3,"avg_high_f":82,"avg_low_f":62.6,"precip_in":3.5,"snow_in":0,"heating_degree_days":5.9,"cooling_degree_days":232.1,"days_with_precip":9.9,"days_with_snow":0,"days_freezing":0,"days_90f_plus":3.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":65.4,"avg_high_f":76.3,"avg_low_f":54.4,"precip_in":4.18,"snow_in":0,"heating_degree_days":91.5,"cooling_degree_days":101.9,"days_with_precip":8.1,"days_with_snow":0,"days_freezing":0,"days_90f_plus":1.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":52.8,"avg_high_f":63.8,"avg_low_f":41.8,"precip_in":3.03,"snow_in":0.2,"heating_degree_days":391.7,"cooling_degree_days":13.5,"days_with_precip":9.7,"days_with_snow":0.1,"days_freezing":5.4,"days_90f_plus":0.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":40,"avg_high_f":49.3,"avg_low_f":30.7,"precip_in":2.51,"snow_in":1.4,"heating_degree_days":750.4,"cooling_degree_days":0.4,"days_with_precip":8,"days_with_snow":0.6,"days_freezing":18.4,"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":28.5,"avg_high_f":36.4,"avg_low_f":20.5,"precip_in":2.17,"snow_in":5.9,"heating_degree_days":1132.9,"cooling_degree_days":0,"days_with_precip":9.4,"days_with_snow":3.5,"days_freezing":27,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}