Tanzania has a tropical climate strongly modified by altitude, ranging from hot, humid coastlines around 25–33°C (77–91°F) to sub-zero conditions on Mount Kilimanjaro's 5,895 m summit — and the best time to visit for safari is the dry season from June to October. Straddling the equator on Africa's eastern flank, the country packs steamy beaches, cool savanna plateaus, misty crater rims, and glaciated peaks into a single nation, so "the weather in Tanzania" really depends on exactly where you stand.
How Altitude Shapes the Climate
Tanzania sits squarely in the tropics, which would normally mean uniform heat all year. Instead, elevation does most of the work in deciding local conditions. The Indian Ocean coast and the islands of Zanzibar and Pemba sit at sea level and stay warm and humid year-round. The vast central plateau — including Dodoma, the Serengeti, and much of the safari country — sits between 1,000 and 1,800 m, giving it pleasantly warm days and cool nights. Higher still, the Ngorongoro Crater rim (around 2,286 m) and the Southern Highlands are noticeably cooler and wetter.
The most dramatic example is Kilimanjaro, where climbers pass through tropical farmland, rainforest, heath, alpine desert, and finally an arctic summit zone — all within roughly 60 horizontal kilometres. Few places on Earth compress so many climate bands into such a short distance, which is exactly why the mountain is such a magnet for trekkers.
Temperatures Across the Regions
Because of this varied terrain, a single "average temperature" is misleading. Here is what to expect in the main travel zones:
- Coast & Zanzibar: 24–33°C (75–91°F) year-round, with high humidity and warm seas.
- Dar es Salaam: averages around 26°C (79°F), hottest December to March.
- Serengeti & Ngorongoro plateau: 15–28°C (59–82°F), with chilly mornings of 10–12°C in the dry season.
- Southern & Western Highlands: typically 10–25°C (50–77°F), cool and green.
- Kilimanjaro summit: -15 to 0°C (5–32°F), with severe wind chill on the ice fields.
Travellers heading on safari in July and August are often surprised by how cold dawn game drives can feel on the open plains, so a warm layer is essential even in this equatorial country.
The Two Rainy Seasons
Like much of East Africa, Tanzania has a bimodal rainfall pattern with two wet and two dry periods rather than the single rainy season many visitors expect:
- Long rains (masika): March to May — the heaviest, wettest stretch of the year.
- Short rains (vuli): November to December — lighter, intermittent showers.
- Long dry season: June to October — clear skies and the peak travel window.
- Short dry season: January to February — warm and largely sunny.
Rainfall totals vary enormously. The semi-arid central steppe may receive only 500 mm a year, the Serengeti gets roughly 500–1,100 mm, Zanzibar collects about 1,600 mm, and parts of the Lake Victoria basin and Southern Highlands exceed 2,000 mm. During the long rains, some remote safari roads become impassable and a number of seasonal camps close, while the short rains rarely disrupt travel and bring lush green landscapes ideal for photography.
Best Time to Visit Tanzania
Timing depends entirely on what you want to do:
- Classic Serengeti & Ngorongoro safari: June to October, when thinning grass and animals gathering at water make wildlife easy to spot.
- Wildebeest calving: late January to February in the southern Serengeti, when hundreds of thousands of calves are born.
- Climbing Kilimanjaro: January to March and June to October, the driest and safest months for the ascent.
- Zanzibar beaches: July to October and December to February, for clear skies and calm seas.
The June to October dry season is the all-round favourite, combining excellent game viewing with comfortable temperatures, though it is also the busiest and priciest period. The April–May long rains form the low season, offering steep discounts and quiet parks for travellers who don't mind muddy tracks and afternoon downpours.
Climate Curiosities
Tanzania's climate produces some remarkable quirks. Kilimanjaro famously carries glaciers almost on the equator, although they have shrunk dramatically and scientists warn they could vanish within a couple of decades. The Ngorongoro Crater generates its own microclimate, its high walls trapping moisture to sustain a permanent lake and year-round grazing that supports dense wildlife. Meanwhile, the great wildebeest migration of more than a million animals is driven almost entirely by the rhythm of the rains, as herds chase fresh grass across the Serengeti ecosystem. For more on the country's geography and travel essentials, see our tanzania country guide.
Frequently Asked Questions
What is the hottest time of year in Tanzania?
The coast and Zanzibar are hottest from December to March, when daytime temperatures climb into the low 30s°C (high 80s to low 90s°F) with high humidity. Inland plateaus stay milder thanks to their altitude.
When is the rainy season in Tanzania?
There are two: the long rains from March to May, which are heavy, and the short rains in November and December, which are lighter and usually don't interfere with travel.
Is Tanzania cold at night on safari?
Yes. On the Serengeti and Ngorongoro plateaus, dry-season nights and early mornings can drop to 10–12°C (50–54°F), so warm layers are recommended even though midday is pleasantly warm.
What is the best month for a Tanzania safari?
July through September is widely considered ideal — peak dry season means short grass, concentrated wildlife around water sources, and reliably clear skies for game viewing.
