{"metadata":{"title":"Polson, MT Monthly Climate Normals","page_url":"https://plainclimate.com/city/polson-mt","primary_station_id":"USC00246635","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, \"Polson, MT Climate Normals\". https://plainclimate.com/city/polson-mt","row_count":12},"annual_summary":{"city_slug":"polson-mt","ann_tavg":46.2,"ann_tmax":56.5,"ann_tmin":35.8,"ann_prcp":15.01,"ann_snow":null,"ann_htdd":7129.6,"ann_cldd":294.5,"frost_first":"10/05","frost_last":"05/10","growing_season":148,"warmest_month":7,"coldest_month":12,"wettest_month":6,"driest_month":8,"snowiest_month":null,"comfort_score":52},"data":[{"month":"January","month_number":1,"avg_temp_f":27.7,"avg_high_f":33.4,"avg_low_f":22,"precip_in":0.94,"snow_in":null,"heating_degree_days":1156.3,"cooling_degree_days":0,"days_with_precip":11.3,"days_with_snow":null,"days_freezing":26.7,"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":29.4,"avg_high_f":36.9,"avg_low_f":22,"precip_in":0.79,"snow_in":null,"heating_degree_days":995.2,"cooling_degree_days":0,"days_with_precip":7.8,"days_with_snow":null,"days_freezing":25,"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":37.8,"avg_high_f":47.3,"avg_low_f":28.2,"precip_in":0.89,"snow_in":null,"heating_degree_days":844.8,"cooling_degree_days":0,"days_with_precip":8.4,"days_with_snow":null,"days_freezing":22,"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":44.9,"avg_high_f":56.2,"avg_low_f":33.6,"precip_in":1.43,"snow_in":null,"heating_degree_days":603,"cooling_degree_days":0,"days_with_precip":9.5,"days_with_snow":null,"days_freezing":11.7,"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":53.3,"avg_high_f":65.8,"avg_low_f":40.8,"precip_in":1.99,"snow_in":null,"heating_degree_days":367.7,"cooling_degree_days":4.9,"days_with_precip":10.6,"days_with_snow":null,"days_freezing":3.2,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":59.8,"avg_high_f":72.3,"avg_low_f":47.3,"precip_in":2.44,"snow_in":null,"heating_degree_days":177.4,"cooling_degree_days":21.4,"days_with_precip":11.9,"days_with_snow":null,"days_freezing":0.2,"days_90f_plus":0.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":68,"avg_high_f":82.8,"avg_low_f":53.3,"precip_in":0.84,"snow_in":null,"heating_degree_days":39.3,"cooling_degree_days":133.7,"days_with_precip":4.9,"days_with_snow":null,"days_freezing":0,"days_90f_plus":6.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":67.3,"avg_high_f":82.2,"avg_low_f":52.5,"precip_in":0.76,"snow_in":null,"heating_degree_days":47,"cooling_degree_days":119.8,"days_with_precip":5,"days_with_snow":null,"days_freezing":0,"days_90f_plus":4.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":58.3,"avg_high_f":70.9,"avg_low_f":45.6,"precip_in":1.19,"snow_in":null,"heating_degree_days":217.2,"cooling_degree_days":14.6,"days_with_precip":6.6,"days_with_snow":null,"days_freezing":0.6,"days_90f_plus":0.1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":45.6,"avg_high_f":55.6,"avg_low_f":35.7,"precip_in":1.59,"snow_in":null,"heating_degree_days":599.9,"cooling_degree_days":0.1,"days_with_precip":9,"days_with_snow":null,"days_freezing":9.2,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":34.3,"avg_high_f":41.3,"avg_low_f":27.3,"precip_in":1.22,"snow_in":null,"heating_degree_days":921,"cooling_degree_days":0,"days_with_precip":9.8,"days_with_snow":null,"days_freezing":21.1,"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":27.6,"avg_high_f":33.1,"avg_low_f":22,"precip_in":0.93,"snow_in":null,"heating_degree_days":1160.8,"cooling_degree_days":0,"days_with_precip":9.5,"days_with_snow":null,"days_freezing":27.2,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}