{"metadata":{"title":"Grand Junction, CO Monthly Climate Normals","page_url":"https://plainclimate.com/city/grand-junction-co","primary_station_id":"USC00053489","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, \"Grand Junction, CO Climate Normals\". https://plainclimate.com/city/grand-junction-co","row_count":12},"annual_summary":{"city_slug":"grand-junction-co","ann_tavg":54,"ann_tmax":66.3,"ann_tmin":41.8,"ann_prcp":8.89,"ann_snow":12.6,"ann_htdd":5259.2,"ann_cldd":1284.1,"frost_first":"10/20","frost_last":"04/23","growing_season":180,"warmest_month":7,"coldest_month":1,"wettest_month":9,"driest_month":6,"snowiest_month":12,"comfort_score":44},"data":[{"month":"January","month_number":1,"avg_temp_f":29.2,"avg_high_f":39.1,"avg_low_f":19.2,"precip_in":0.5,"snow_in":3.4,"heating_degree_days":1111.2,"cooling_degree_days":0,"days_with_precip":4.6,"days_with_snow":3.7,"days_freezing":30,"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":35.9,"avg_high_f":46.5,"avg_low_f":25.2,"precip_in":0.46,"snow_in":2.1,"heating_degree_days":816.1,"cooling_degree_days":0,"days_with_precip":5.6,"days_with_snow":2.2,"days_freezing":24.5,"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":45.8,"avg_high_f":57.9,"avg_low_f":33.7,"precip_in":0.77,"snow_in":1.1,"heating_degree_days":595.5,"cooling_degree_days":0.1,"days_with_precip":5.8,"days_with_snow":1.1,"days_freezing":14.3,"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":52.8,"avg_high_f":65.4,"avg_low_f":40.2,"precip_in":0.96,"snow_in":0.6,"heating_degree_days":371.4,"cooling_degree_days":5.5,"days_with_precip":6.8,"days_with_snow":0.4,"days_freezing":4.8,"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":62.6,"avg_high_f":75.6,"avg_low_f":49.5,"precip_in":0.93,"snow_in":0,"heating_degree_days":143.6,"cooling_degree_days":67.7,"days_with_precip":5.4,"days_with_snow":0,"days_freezing":0.5,"days_90f_plus":1.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":73.4,"avg_high_f":87.7,"avg_low_f":59.2,"precip_in":0.45,"snow_in":0,"heating_degree_days":17.6,"cooling_degree_days":271,"days_with_precip":2.8,"days_with_snow":0,"days_freezing":0,"days_90f_plus":15.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"July","month_number":7,"avg_temp_f":79.2,"avg_high_f":93.1,"avg_low_f":65.3,"precip_in":0.72,"snow_in":0,"heating_degree_days":0.5,"cooling_degree_days":440.4,"days_with_precip":4.8,"days_with_snow":0,"days_freezing":0,"days_90f_plus":24.8,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":76.4,"avg_high_f":89.8,"avg_low_f":63,"precip_in":0.78,"snow_in":0,"heating_degree_days":1.4,"cooling_degree_days":354.6,"days_with_precip":6,"days_with_snow":0,"days_freezing":0,"days_90f_plus":19.6,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":67.8,"avg_high_f":81.2,"avg_low_f":54.4,"precip_in":1.21,"snow_in":0,"heating_degree_days":53.2,"cooling_degree_days":137.1,"days_with_precip":6.6,"days_with_snow":0,"days_freezing":0.1,"days_90f_plus":4.5,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":54.2,"avg_high_f":67.1,"avg_low_f":41.4,"precip_in":0.92,"snow_in":0.2,"heating_degree_days":340.8,"cooling_degree_days":7.6,"days_with_precip":6.1,"days_with_snow":0.3,"days_freezing":4.4,"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":41.1,"avg_high_f":52.3,"avg_low_f":29.9,"precip_in":0.68,"snow_in":1.7,"heating_degree_days":717.1,"cooling_degree_days":0,"days_with_precip":4.4,"days_with_snow":1.1,"days_freezing":19.3,"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":29.8,"avg_high_f":39.6,"avg_low_f":20,"precip_in":0.51,"snow_in":3.5,"heating_degree_days":1090.9,"cooling_degree_days":0,"days_with_precip":4.1,"days_with_snow":3.4,"days_freezing":30.1,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}