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3/22/2021 Average Weather in Golden,Colorado,United States,Year Round-Weather Spark <br /> The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season. <br /> Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development,and defined as the integral of warmth above a base temperature,discarding any excess <br /> above a maximum temperature.In this report,we use a base of 50°F and a cap of 86°F. <br /> Based on growing degree days alone,the first spring blooms in Golden should appear around April 8,only rarely appearing before March 22 or after April 29. <br /> Growing Degree Days <br /> 3,0000E 3,000°F <br /> 2,5000E Dec 31 2,500°F <br /> 2,736 F <br /> Aug 14 <br /> 2,0000E 1 ,8000E 2,000°F <br /> 1 ,5000F 1 ,5000E <br /> Jul 1 <br /> 0 F 900 <br /> 1 ,0000E 1 ,000°F <br /> 5000F q'pr 8 500°F <br /> 890 F <br /> ° O <br /> 0 F Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 0 F <br /> The average growing degree days accumulated over the course of the year,with 25th to 75th and 10th to 90th percentile bands. <br /> Solar Energy <br /> This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area,taking full account of seasonal variations in the length of the day,the elevation of <br /> the Sun above the horizon,and absorption by clouds and other atmospheric constituents.Shortwave radiation includes visible light and ultraviolet radiation. <br /> The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year. <br /> The brighter period of the year lasts for 2.8 months,from May 9 to August 2,with an average daily incident shortwave energy per square meter above 6.9 kWh.The brightest day of the year is June 21,with <br /> an average of 7.9 kWh. <br /> The darker period of the year lasts for 3.2 months,from November 3 to February 9,with an average daily incident shortwave energy per square meter below 3.6 kWh.The darkest day of the year is <br /> December 21,with an average of 2.5 kWh. <br /> Average Daily Incident Shortwave Solar Energy <br /> hftps://weatherspark.com/y/3539/Average-Weather-in-Golden-Colorado-United-States-Year-Round#Sections-Summary 16/19 <br />