is the temperature higher in a park?
Winter Weather in Zion. Zion during winter (November-February) months the park is slow but it is still open and draws many visitors. The lowest recorded temperature in the park was -20 Degrees F. in 1989. Winter months typically have a much higher average of precipitation and will receive both rain and snow.December is the coldest months of the year in Zion so take that into consideration if you plan to enter the park then.ion National Park during the mild fall and spring months of the year, typically have the best temperatures and see no extremes temperatures generally. With the average daytime high temperatures being around 70 degreeâs in the mild spring and fall months, it makes for a great choice.