{"metadata":{"title":"Perry, IL Monthly Climate Normals","page_url":"https://plainclimate.com/city/perry-il","primary_station_id":"USC00116738","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, \"Perry, IL Climate Normals\". https://plainclimate.com/city/perry-il","row_count":12},"annual_summary":{"city_slug":"perry-il","ann_tavg":53.3,"ann_tmax":64.2,"ann_tmin":42.4,"ann_prcp":39.07,"ann_snow":20.9,"ann_htdd":5405.5,"ann_cldd":1168.9,"frost_first":"10/15","frost_last":"04/18","growing_season":180,"warmest_month":7,"coldest_month":1,"wettest_month":6,"driest_month":1,"snowiest_month":1,"comfort_score":59},"data":[{"month":"January","month_number":1,"avg_temp_f":27.1,"avg_high_f":36.5,"avg_low_f":17.8,"precip_in":1.96,"snow_in":6.1,"heating_degree_days":1173,"cooling_degree_days":0,"days_with_precip":8.5,"days_with_snow":4.5,"days_freezing":28.4,"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":31.7,"avg_high_f":41.6,"avg_low_f":21.7,"precip_in":2,"snow_in":6,"heating_degree_days":933.7,"cooling_degree_days":0,"days_with_precip":7.7,"days_with_snow":3.8,"days_freezing":24.1,"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":42.1,"avg_high_f":52.8,"avg_low_f":31.3,"precip_in":2.57,"snow_in":2.4,"heating_degree_days":714.1,"cooling_degree_days":2.6,"days_with_precip":9.6,"days_with_snow":1.6,"days_freezing":19.2,"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":53.4,"avg_high_f":65,"avg_low_f":41.8,"precip_in":3.92,"snow_in":0.4,"heating_degree_days":365.4,"cooling_degree_days":17.4,"days_with_precip":11.6,"days_with_snow":0.3,"days_freezing":5.9,"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":64.1,"avg_high_f":74.9,"avg_low_f":53.3,"precip_in":4.41,"snow_in":0,"heating_degree_days":122.5,"cooling_degree_days":94.5,"days_with_precip":12.6,"days_with_snow":0,"days_freezing":0.2,"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":73,"avg_high_f":83.8,"avg_low_f":62.2,"precip_in":4.75,"snow_in":0,"heating_degree_days":13.7,"cooling_degree_days":253.4,"days_with_precip":10.8,"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":"July","month_number":7,"avg_temp_f":76.2,"avg_high_f":87.3,"avg_low_f":65.1,"precip_in":4.48,"snow_in":0,"heating_degree_days":1.5,"cooling_degree_days":348.6,"days_with_precip":9.2,"days_with_snow":0,"days_freezing":0,"days_90f_plus":10.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":74.4,"avg_high_f":86.1,"avg_low_f":62.7,"precip_in":3.21,"snow_in":0,"heating_degree_days":3.9,"cooling_degree_days":295.1,"days_with_precip":9.3,"days_with_snow":0,"days_freezing":0,"days_90f_plus":8.6,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":67,"avg_high_f":79.9,"avg_low_f":54.2,"precip_in":3.59,"snow_in":0,"heating_degree_days":72.2,"cooling_degree_days":133.5,"days_with_precip":7.6,"days_with_snow":0,"days_freezing":0.3,"days_90f_plus":3.7,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":55.1,"avg_high_f":67.5,"avg_low_f":42.7,"precip_in":3.1,"snow_in":0,"heating_degree_days":329.3,"cooling_degree_days":22.4,"days_with_precip":9.2,"days_with_snow":0,"days_freezing":5.4,"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":43,"avg_high_f":53.3,"avg_low_f":32.8,"precip_in":2.82,"snow_in":0.9,"heating_degree_days":659.7,"cooling_degree_days":1.2,"days_with_precip":8.4,"days_with_snow":0.5,"days_freezing":15.7,"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":32.2,"avg_high_f":41.2,"avg_low_f":23.2,"precip_in":2.26,"snow_in":5.1,"heating_degree_days":1016.6,"cooling_degree_days":0,"days_with_precip":8.6,"days_with_snow":3.3,"days_freezing":26.2,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}