{"metadata":{"title":"Spencer, IA Monthly Climate Normals","page_url":"https://plainclimate.com/city/spencer-ia","primary_station_id":"USC00137844","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, \"Spencer, IA Climate Normals\". https://plainclimate.com/city/spencer-ia","row_count":12},"annual_summary":{"city_slug":"spencer-ia","ann_tavg":46.1,"ann_tmax":56.6,"ann_tmin":35.6,"ann_prcp":30.99,"ann_snow":43.3,"ann_htdd":7560.4,"ann_cldd":712.6,"frost_first":"10/03","frost_last":"05/01","growing_season":155,"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":16.1,"avg_high_f":25.1,"avg_low_f":7,"precip_in":0.72,"snow_in":9.8,"heating_degree_days":1517.2,"cooling_degree_days":0,"days_with_precip":6.3,"days_with_snow":5.5,"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":20.6,"avg_high_f":29.8,"avg_low_f":11.4,"precip_in":0.79,"snow_in":8.9,"heating_degree_days":1243,"cooling_degree_days":0,"days_with_precip":5.9,"days_with_snow":5.2,"days_freezing":27.2,"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":33.3,"avg_high_f":43,"avg_low_f":23.7,"precip_in":1.66,"snow_in":5.9,"heating_degree_days":981.5,"cooling_degree_days":0.3,"days_with_precip":7.5,"days_with_snow":3.4,"days_freezing":25.1,"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":46.3,"avg_high_f":57.7,"avg_low_f":34.9,"precip_in":3.49,"snow_in":3,"heating_degree_days":565.1,"cooling_degree_days":4.1,"days_with_precip":10.7,"days_with_snow":1.4,"days_freezing":11.5,"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":58.6,"avg_high_f":69.9,"avg_low_f":47.4,"precip_in":4.19,"snow_in":0.1,"heating_degree_days":240,"cooling_degree_days":43.1,"days_with_precip":12.7,"days_with_snow":0,"days_freezing":1.2,"days_90f_plus":0.9,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":69.3,"avg_high_f":80.3,"avg_low_f":58.3,"precip_in":4.6,"snow_in":0,"heating_degree_days":35.1,"cooling_degree_days":164,"days_with_precip":11.5,"days_with_snow":0,"days_freezing":0,"days_90f_plus":4.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":72.7,"avg_high_f":83.7,"avg_low_f":61.8,"precip_in":3.74,"snow_in":0,"heating_degree_days":8.5,"cooling_degree_days":248.7,"days_with_precip":8.8,"days_with_snow":0,"days_freezing":0,"days_90f_plus":6.3,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":70,"avg_high_f":81,"avg_low_f":59,"precip_in":3.77,"snow_in":0,"heating_degree_days":21,"cooling_degree_days":175.9,"days_with_precip":8.7,"days_with_snow":0,"days_freezing":0,"days_90f_plus":2.9,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":62.4,"avg_high_f":74.6,"avg_low_f":50.2,"precip_in":3.29,"snow_in":0,"heating_degree_days":148.4,"cooling_degree_days":70.2,"days_with_precip":8.2,"days_with_snow":0,"days_freezing":0.8,"days_90f_plus":1.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":48.7,"avg_high_f":60.2,"avg_low_f":37.3,"precip_in":2.35,"snow_in":0.7,"heating_degree_days":510.2,"cooling_degree_days":6.4,"days_with_precip":8.1,"days_with_snow":0.4,"days_freezing":9.7,"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":33.8,"avg_high_f":43.6,"avg_low_f":23.9,"precip_in":1.41,"snow_in":5.3,"heating_degree_days":937.5,"cooling_degree_days":0,"days_with_precip":6.1,"days_with_snow":2.8,"days_freezing":24.3,"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":21.3,"avg_high_f":30,"avg_low_f":12.7,"precip_in":0.98,"snow_in":9.6,"heating_degree_days":1353,"cooling_degree_days":0,"days_with_precip":6.5,"days_with_snow":5.2,"days_freezing":30.3,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}