Winters in Gresham are cool and occasionally chilly, with temperatures often below freezing during January and December. Springs are mild and pleasant, with temperatures gradually warming up through March and April, sometimes reaching highs of around 29°C. Summers bring warm to hot conditions, with July being the warmest month, while August and June are also quite warm. Autumns see a return to cooler temperatures, similar to those experienced in winter, but without the occasional cold snaps that occur during winter months. Overall, temperature fluctuations throughout the year are relatively moderate, ranging from around -4°C to 47°C.