{"metadata":{"title":"Hamilton, MT Monthly Climate Normals","page_url":"https://plainclimate.com/city/hamilton-mt","primary_station_id":"USC00243885","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, \"Hamilton, MT Climate Normals\". https://plainclimate.com/city/hamilton-mt","row_count":12},"annual_summary":{"city_slug":"hamilton-mt","ann_tavg":44.8,"ann_tmax":57.4,"ann_tmin":32.2,"ann_prcp":13.6,"ann_snow":null,"ann_htdd":7551.1,"ann_cldd":215.5,"frost_first":"09/22","frost_last":"05/21","growing_season":124,"warmest_month":7,"coldest_month":12,"wettest_month":6,"driest_month":8,"snowiest_month":null,"comfort_score":40},"data":[{"month":"January","month_number":1,"avg_temp_f":27,"avg_high_f":35.1,"avg_low_f":18.9,"precip_in":0.96,"snow_in":null,"heating_degree_days":1178,"cooling_degree_days":0,"days_with_precip":9.2,"days_with_snow":null,"days_freezing":27.7,"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":29.3,"avg_high_f":39.2,"avg_low_f":19.5,"precip_in":1.18,"snow_in":null,"heating_degree_days":998.2,"cooling_degree_days":0,"days_with_precip":8.7,"days_with_snow":null,"days_freezing":25.9,"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":36.7,"avg_high_f":48.9,"avg_low_f":24.6,"precip_in":0.98,"snow_in":null,"heating_degree_days":875.8,"cooling_degree_days":0,"days_with_precip":10.3,"days_with_snow":null,"days_freezing":25.7,"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":43.4,"avg_high_f":56.1,"avg_low_f":30.7,"precip_in":1.12,"snow_in":null,"heating_degree_days":648,"cooling_degree_days":0,"days_with_precip":9.4,"days_with_snow":null,"days_freezing":16.1,"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":51.9,"avg_high_f":65.5,"avg_low_f":38.2,"precip_in":1.53,"snow_in":null,"heating_degree_days":409.8,"cooling_degree_days":2.1,"days_with_precip":10.7,"days_with_snow":null,"days_freezing":4.9,"days_90f_plus":0.3,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":58.9,"avg_high_f":73,"avg_low_f":44.7,"precip_in":1.65,"snow_in":null,"heating_degree_days":205,"cooling_degree_days":20.5,"days_with_precip":9.7,"days_with_snow":null,"days_freezing":0.2,"days_90f_plus":1.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":66.8,"avg_high_f":84,"avg_low_f":49.7,"precip_in":0.85,"snow_in":null,"heating_degree_days":52.4,"cooling_degree_days":109.7,"days_with_precip":6.6,"days_with_snow":null,"days_freezing":0,"days_90f_plus":10.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":65,"avg_high_f":82.4,"avg_low_f":47.7,"precip_in":0.8,"snow_in":null,"heating_degree_days":73.5,"cooling_degree_days":75,"days_with_precip":7,"days_with_snow":null,"days_freezing":0,"days_90f_plus":8.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":56.2,"avg_high_f":71.9,"avg_low_f":40.4,"precip_in":0.81,"snow_in":null,"heating_degree_days":273.6,"cooling_degree_days":8.1,"days_with_precip":6.3,"days_with_snow":null,"days_freezing":2.1,"days_90f_plus":1,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":43.9,"avg_high_f":56.8,"avg_low_f":30.9,"precip_in":0.94,"snow_in":null,"heating_degree_days":655.6,"cooling_degree_days":0,"days_with_precip":8.7,"days_with_snow":null,"days_freezing":16.5,"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":32.9,"avg_high_f":42.6,"avg_low_f":23.2,"precip_in":1.45,"snow_in":null,"heating_degree_days":963,"cooling_degree_days":0,"days_with_precip":10.1,"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":"December","month_number":12,"avg_temp_f":25.7,"avg_high_f":33.5,"avg_low_f":17.9,"precip_in":1.33,"snow_in":null,"heating_degree_days":1218.2,"cooling_degree_days":0,"days_with_precip":10.4,"days_with_snow":null,"days_freezing":28.3,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}