{"metadata":{"title":"Rock Springs, WY Monthly Climate Normals","page_url":"https://plainclimate.com/city/rock-springs-wy","primary_station_id":"USW00024027","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, \"Rock Springs, WY Climate Normals\". https://plainclimate.com/city/rock-springs-wy","row_count":12},"annual_summary":{"city_slug":"rock-springs-wy","ann_tavg":43.7,"ann_tmax":55,"ann_tmin":32.4,"ann_prcp":7.55,"ann_snow":54,"ann_htdd":8063.8,"ann_cldd":319.2,"frost_first":"09/28","frost_last":"05/22","growing_season":129,"warmest_month":7,"coldest_month":12,"wettest_month":5,"driest_month":12,"snowiest_month":4,"comfort_score":24},"data":[{"month":"January","month_number":1,"avg_temp_f":21.5,"avg_high_f":29.5,"avg_low_f":13.6,"precip_in":0.38,"snow_in":8.2,"heating_degree_days":1347,"cooling_degree_days":0,"days_with_precip":5.3,"days_with_snow":7.3,"days_freezing":30.8,"days_90f_plus":0,"humidity_pct":66.79166666666667,"wind_speed_mph":12.391666666666666,"clear_sky_pct":54.475,"overcast_pct":19.900000000000002},{"month":"February","month_number":2,"avg_temp_f":24.3,"avg_high_f":32.9,"avg_low_f":15.7,"precip_in":0.37,"snow_in":7.9,"heating_degree_days":1139.4,"cooling_degree_days":0,"days_with_precip":5.1,"days_with_snow":5.6,"days_freezing":27.4,"days_90f_plus":0,"humidity_pct":61.958333333333336,"wind_speed_mph":12.291666666666666,"clear_sky_pct":53.074999999999996,"overcast_pct":17.829166666666666},{"month":"March","month_number":3,"avg_temp_f":34,"avg_high_f":43.9,"avg_low_f":24.1,"precip_in":0.58,"snow_in":6.4,"heating_degree_days":961.1,"cooling_degree_days":0,"days_with_precip":6.6,"days_with_snow":5.2,"days_freezing":27.5,"days_90f_plus":0,"humidity_pct":51.041666666666664,"wind_speed_mph":12.595833333333333,"clear_sky_pct":47.92916666666667,"overcast_pct":19.4875},{"month":"April","month_number":4,"avg_temp_f":41.2,"avg_high_f":52.8,"avg_low_f":29.7,"precip_in":0.91,"snow_in":8.8,"heating_degree_days":712.4,"cooling_degree_days":0,"days_with_precip":8.3,"days_with_snow":6.2,"days_freezing":20.7,"days_90f_plus":0,"humidity_pct":45.125,"wind_speed_mph":12.5,"clear_sky_pct":46.10833333333333,"overcast_pct":18.233333333333334},{"month":"May","month_number":5,"avg_temp_f":50.8,"avg_high_f":63.2,"avg_low_f":38.4,"precip_in":1.27,"snow_in":2.7,"heating_degree_days":442.4,"cooling_degree_days":2.1,"days_with_precip":9,"days_with_snow":2,"days_freezing":7.2,"days_90f_plus":0,"humidity_pct":42,"wind_speed_mph":11.041666666666666,"clear_sky_pct":52.89166666666667,"overcast_pct":12.066666666666668},{"month":"June","month_number":6,"avg_temp_f":61,"avg_high_f":75,"avg_low_f":47,"precip_in":0.7,"snow_in":0.4,"heating_degree_days":158.7,"cooling_degree_days":38.7,"days_with_precip":5.5,"days_with_snow":0.3,"days_freezing":0.7,"days_90f_plus":1.1,"humidity_pct":30.25,"wind_speed_mph":10.020833333333334,"clear_sky_pct":69.3625,"overcast_pct":3.3041666666666667},{"month":"July","month_number":7,"avg_temp_f":69.4,"avg_high_f":84.1,"avg_low_f":54.8,"precip_in":0.47,"snow_in":0,"heating_degree_days":21,"cooling_degree_days":158.7,"days_with_precip":4.7,"days_with_snow":0,"days_freezing":0,"days_90f_plus":6.6,"humidity_pct":33,"wind_speed_mph":8.85,"clear_sky_pct":64.64166666666667,"overcast_pct":4.654166666666667},{"month":"August","month_number":8,"avg_temp_f":67.3,"avg_high_f":81.5,"avg_low_f":53.1,"precip_in":0.56,"snow_in":0,"heating_degree_days":37.6,"cooling_degree_days":108.8,"days_with_precip":6,"days_with_snow":0,"days_freezing":0,"days_90f_plus":2.1,"humidity_pct":33.375,"wind_speed_mph":9.091666666666667,"clear_sky_pct":65.21249999999999,"overcast_pct":4.679166666666666},{"month":"September","month_number":9,"avg_temp_f":57.3,"avg_high_f":70.7,"avg_low_f":43.9,"precip_in":0.79,"snow_in":1.2,"heating_degree_days":241.9,"cooling_degree_days":10.8,"days_with_precip":6.1,"days_with_snow":0.4,"days_freezing":2.1,"days_90f_plus":0.1,"humidity_pct":41.708333333333336,"wind_speed_mph":10.029166666666667,"clear_sky_pct":67.51666666666667,"overcast_pct":11.158333333333333},{"month":"October","month_number":10,"avg_temp_f":44.5,"avg_high_f":56,"avg_low_f":32.9,"precip_in":0.81,"snow_in":6.6,"heating_degree_days":637.1,"cooling_degree_days":0,"days_with_precip":5.9,"days_with_snow":3,"days_freezing":15,"days_90f_plus":0,"humidity_pct":52.041666666666664,"wind_speed_mph":11.487499999999999,"clear_sky_pct":59.01666666666667,"overcast_pct":19.229166666666668},{"month":"November","month_number":11,"avg_temp_f":31.2,"avg_high_f":40.5,"avg_low_f":21.8,"precip_in":0.4,"snow_in":6,"heating_degree_days":1015.5,"cooling_degree_days":0,"days_with_precip":4.8,"days_with_snow":5.5,"days_freezing":26.7,"days_90f_plus":0,"humidity_pct":62.541666666666664,"wind_speed_mph":11.795833333333334,"clear_sky_pct":57.35833333333333,"overcast_pct":19.854166666666668},{"month":"December","month_number":12,"avg_temp_f":21.4,"avg_high_f":29.5,"avg_low_f":13.4,"precip_in":0.31,"snow_in":5.8,"heating_degree_days":1349.8,"cooling_degree_days":0,"days_with_precip":4.8,"days_with_snow":6.1,"days_freezing":30.6,"days_90f_plus":0,"humidity_pct":67.20833333333333,"wind_speed_mph":11.920833333333334,"clear_sky_pct":55.94782608695652,"overcast_pct":20.91304347826087}]}