Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 0°C) in the year (the calendar year in the Northern Hemisphere, or from 7月1日 until 6月30日 in the Southern Hemisphere).
Temperatures in San Manuel are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.
Time Spent in Various Temperature Bands and the Growing Season in 十一月
The percentage of time spent in various temperature bands: frigid < -9°C < freezing < 0°C < very cold < 7°C < cold < 13°C < cool < 18°C < comfortable < 24°C < warm < 29°C < hot < 35°C < sweltering. The black line is the percentage chance that a given day is within the growing season.
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 above a maximum temperature. In this report, we use a base of 10°C and a cap of 30°C.
The average accumulated growing degree days in San Manuel are rapidly increasing during 十一月, increasing by 428°C, from 4,940°C to 5,368°C, over the course of the month.
The average growing degree days accumulated over the course of 十一月, with 25th to 75th and 10th to 90th percentile bands.
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