The best time to visit is November through March, the dry season. Temperatures are hot — often above 35°C — but the air is dry, the skies are clear, and the roads to Mole and surrounding areas are passable. December and January bring the harmattan, a dusty wind that blows down from the Sahara and wraps the landscape in a haze that softens the light and coats everything in fine red dust. Visibility can drop considerably, which affects photographs, but the weather stays dry and manageable.
From May through September, the rains arrive. Tamale itself stays functional, but the laterite roads to Mole National Park turn to mud and can become impassable after heavy downpours. Wildlife viewing in the park also gets harder — the animals spread out once water is plentiful. If you are going specifically for Mole, avoid this window. April is transitional: warm and increasingly humid, but usually still dry enough.
Two festivals are worth planning around. The Damba Festival, held to mark the birth of the Prophet Muhammad, falls in the Islamic month of Maulid — roughly July or August in the Gregorian calendar, though the exact date shifts annually. It is the most important celebration in Tamale's calendar: the Ya-Na and regional sub-chiefs appear in full ceremonial dress, there is drumming, dancing, and processions on horseback, and the atmosphere in the city is electric. Check dates carefully before booking, as they vary by several weeks each year.
The Bugum Fire Festival falls on the 28th day of the first Islamic month, typically in January. Crowds carrying flaming grass torches process through the dark streets singing and celebrating — one of the most visually striking events in all of northern Ghana. The combination of fire, drumming, and darkness makes it genuinely unlike anything else on the regional calendar.