Bartlett experiences a moderate climate with cold winters and warm summers. January is the coldest month, with temperatures often below freezing and averaging just 6°C, while February is even chillier, with average lows around 3°C. As spring approaches, temperatures rise steadily, reaching averages of 14°C in March and 16°C in April, before warming up further to 19-26°C through the summer months of May to August. Autumn brings a slight cooling trend, with September averaging 23°C and October dropping back down to around 19°C, before winter returns with temperatures ranging from -5°C to 25°C.