{"metadata":{"title":"Alturas, CA Monthly Climate Normals","page_url":"https://plainclimate.com/city/alturas-ca","primary_station_id":"USC00040161","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, \"Alturas, CA Climate Normals\". https://plainclimate.com/city/alturas-ca","row_count":12},"annual_summary":{"city_slug":"alturas-ca","ann_tavg":48.4,"ann_tmax":64.3,"ann_tmin":32.4,"ann_prcp":11.74,"ann_snow":null,"ann_htdd":6299.7,"ann_cldd":259.3,"frost_first":"09/13","frost_last":"06/03","growing_season":102,"warmest_month":7,"coldest_month":12,"wettest_month":12,"driest_month":7,"snowiest_month":null,"comfort_score":52},"data":[{"month":"January","month_number":1,"avg_temp_f":32.7,"avg_high_f":44.1,"avg_low_f":21.3,"precip_in":1.49,"snow_in":null,"heating_degree_days":1001.3,"cooling_degree_days":0,"days_with_precip":9,"days_with_snow":null,"days_freezing":28.7,"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":35.2,"avg_high_f":47.3,"avg_low_f":23.1,"precip_in":0.98,"snow_in":null,"heating_degree_days":834.3,"cooling_degree_days":0,"days_with_precip":8.7,"days_with_snow":null,"days_freezing":25.8,"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":40.2,"avg_high_f":53.2,"avg_low_f":27.2,"precip_in":1.22,"snow_in":null,"heating_degree_days":768.8,"cooling_degree_days":0,"days_with_precip":9,"days_with_snow":null,"days_freezing":26,"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":45,"avg_high_f":59.2,"avg_low_f":30.9,"precip_in":1.21,"snow_in":null,"heating_degree_days":598.5,"cooling_degree_days":0,"days_with_precip":9.8,"days_with_snow":null,"days_freezing":22.5,"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":53.5,"avg_high_f":69.6,"avg_low_f":37.4,"precip_in":1.39,"snow_in":null,"heating_degree_days":360.2,"cooling_degree_days":3.7,"days_with_precip":7.9,"days_with_snow":null,"days_freezing":10.6,"days_90f_plus":0.6,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"June","month_number":6,"avg_temp_f":60.6,"avg_high_f":79.1,"avg_low_f":42.2,"precip_in":0.71,"snow_in":null,"heating_degree_days":160.2,"cooling_degree_days":29.7,"days_with_precip":4.9,"days_with_snow":null,"days_freezing":3.4,"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":68,"avg_high_f":89.7,"avg_low_f":46.3,"precip_in":0.23,"snow_in":null,"heating_degree_days":32.3,"cooling_degree_days":125.2,"days_with_precip":2.1,"days_with_snow":null,"days_freezing":0.3,"days_90f_plus":17.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"August","month_number":8,"avg_temp_f":66.3,"avg_high_f":88.2,"avg_low_f":44.4,"precip_in":0.3,"snow_in":null,"heating_degree_days":43.4,"cooling_degree_days":83.7,"days_with_precip":1.9,"days_with_snow":null,"days_freezing":0.9,"days_90f_plus":14,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"September","month_number":9,"avg_temp_f":59.6,"avg_high_f":81,"avg_low_f":38.1,"precip_in":0.37,"snow_in":null,"heating_degree_days":180.4,"cooling_degree_days":16.9,"days_with_precip":3.2,"days_with_snow":null,"days_freezing":8.5,"days_90f_plus":4.4,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"October","month_number":10,"avg_temp_f":48.8,"avg_high_f":67,"avg_low_f":30.7,"precip_in":0.94,"snow_in":null,"heating_degree_days":500.8,"cooling_degree_days":0.2,"days_with_precip":4.7,"days_with_snow":null,"days_freezing":22.7,"days_90f_plus":0.2,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null},{"month":"November","month_number":11,"avg_temp_f":38.5,"avg_high_f":51.8,"avg_low_f":25.1,"precip_in":1.39,"snow_in":null,"heating_degree_days":796.5,"cooling_degree_days":0,"days_with_precip":7.8,"days_with_snow":null,"days_freezing":25.8,"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":32,"avg_high_f":41.5,"avg_low_f":22.5,"precip_in":1.51,"snow_in":null,"heating_degree_days":1022.9,"cooling_degree_days":0,"days_with_precip":8.4,"days_with_snow":null,"days_freezing":28.6,"days_90f_plus":0,"humidity_pct":null,"wind_speed_mph":null,"clear_sky_pct":null,"overcast_pct":null}]}