Why Uganda rewards careful timing.
Uganda is on the equator, daylight is 12 hours year-round (sunrise around 6:30 a.m., sunset around 6:45 p.m.), and temperature varies more by altitude than season. Kampala (1,200m) is 18–28°C year-round; Bwindi (1,500–2,500m) is cool at 7–20°C; Murchison Falls (700m) is hot at 22–35°C. What changes is rainfall, and that's the variable that drives trekking and game-viewing decisions.
Dry seasons (June–August and mid-December–February) are the marquee windows. Bwindi gorilla treks at peak conditions, drier paths through the steep, slippery forest (the name 'Impenetrable' is literal, vegetation is dense, terrain is slick, mud accumulates fast). Kibale chimpanzee tracking at peak success rates. Queen Elizabeth and Murchison Falls at peak game viewing as wildlife concentrates at remaining water sources.
Rainy seasons (March–May and September–November) see daily afternoon thunderstorms in most regions. Bwindi and Kibale treks proceed in any weather, primates don't care about rain, but trails become serious mud workouts. Game viewing in Queen Elizabeth and Murchison is harder as wildlife disperses across green landscapes; some safari roads can be impassable. Lodge prices ease 25–40% off dry-season peak.
Bwindi Impenetrable Forest National Park is Uganda's headline draw, home to roughly half the world's mountain gorillas (the other half are in Rwanda's Volcanoes plus the Virungas in DRC). Four trekking sectors: Buhoma (north, easiest access from Kampala), Ruhija (east), Rushaga and Nkuringo (south, near Lake Bunyonyi). Each sector hosts 2–6 habituated gorilla families; 8 permits per family per day, strictly limited. Permits cost $800 USD for foreign non-residents. Buy through Uganda Wildlife Authority (UWA) at ugandawildlife.org or via your safari operator.
Kibale National Park in the west is the chimpanzee tracking capital, a 766 km² montane rainforest with 13 species of primates, including a 5,000-strong chimpanzee population with multiple habituated families. Standard trek ($250) is 2–4 hours with 1 hour of viewing; Chimpanzee Habituation Experience ($300) is a full-day trek with researchers spending all day with a less-habituated family. Best months: June–February dry seasons.
Queen Elizabeth National Park in the southwest is the country's classic savanna safari, tree-climbing lions at Ishasha (the southern sector; lions famously rest in the branches of fig trees during the day, a behavior shared with only one other lion population in the world, Lake Manyara, Tanzania). Boat cruise on the Kazinga Channel (between Lake Edward and Lake George) shows hippos, elephants, water buffalo, and African fish eagles. Best June–February dry seasons.
Murchison Falls National Park in the northwest is the Nile squeezed through a 7-meter gap, the world's most powerful waterfall by volume per width. Boat cruises to the falls are spectacular. Game drives for elephants, giraffes, lions, and the rare Rothschild's giraffe. Best June–February.
Source of the Nile at Jinja, whitewater rafting on the Nile (Class IV–V), bungee jumping, kayaking. Year-round but better May–October when water flows are higher.
Lake Bunyonyi, Africa's deepest lake (900m), with 29 islands and terraced volcanic hillsides, the country's most photogenic destination. Cooler at 1,950m altitude, no malaria, no bilharzia (rare for African lakes). Year-round.
Holidays affecting travel: Liberation Day (January 26), Heroes' Day (June 9), Independence Day (October 9), Christmas–New Year's. Schools in Uganda have December–January and August holidays, driving some domestic travel.