# slr\_ave

This value is calculated by summing the total solar radiation for every day in the month for all years of record and dividing the sum by the number of days:

$$
μrad\_{mon}=\frac{∑*{d=1}^N\*H*{day,mon}}{N}
$$

where $$μrad\_{mon}$$ is the mean daily solar radiation for the month (MJ/m2/day), $$H\_{day,mon}$$ is the total solar radiation reaching the earth’s surface on day $$d$$ in month $$mon$$ (MJ/m2/day), and $$N$$ is the total number of daily solar radiation records for month $$mon$$.


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