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The rainfall, mainly during summer, is erratic and can be as high as 700 mm per year (June to May), but also as low as 300 mm per year (June to May). The average annual rainfall for the park is just over 400 mm per annum.

The temperature is less erratic than the rainfall with cold winters (coldest months June – July) as low as -4 °C, while the summer (warmest months December – January) is as high as 44 °C. Frost occurs, with the earliest date recorded being 27 April and the latest date 23 September.