Winters in Covina are mild, with January and February averaging around 14°C, while December is slightly cooler, averaging 8°C. Spring brings gradually warmer temperatures, with April being the warmest month so far, averaging 17°C. Summer months, June to August, are hot, especially July, which averages 26°C, but also experiences highs of up to 43°C. Autumn sees a return to milder temperatures, with October and November averaging around 16-18°C, before dropping to winter levels again in December.