Doboj's winters are cold and unpredictable, with temperatures often dropping below freezing in January and December. As spring approaches, the weather gradually warms up, with temperatures rising steadily through March and April, reaching averages around 10°C by April. Summer brings warm to hot days, with July and August being the hottest months, but even then temperatures don't usually exceed 38°C. Autumn is generally mild, with September's average temperature already dropping back down to 17°C, setting the stage for another cool winter. The coldest month on record is January, while the warmest is June and July, which are almost identical in terms of temperature averages.