Tanzania's Weather: A Month-by-Month Guide for Travelers

By Elem Adventures Travel Experts · 2026-09-13 · 6 min read

Tanzania is twice the size of many European countries, and its weather answers to altitude more than latitude. The coast bakes, the highlands shiver, and the plains follow a rhythm of seasons that shapes every safari.

The Big Pattern

Tanzania sits close enough to the equator that temperatures change little across the year; what changes is rain. The year splits into a long dry season, a short dry season, and two rainy periods, and each zone (coast, highlands, savannah) experiences them differently.

Temperatures by Region

Altitude decides how hot you feel more than the month does. Temperature drops about 6°C for every 1,000 m, which is why one itinerary can run from 32°C on the coast to frost on the mountain.

The crater floor sits 600 m below the rim and holds near 25°C while rim lodges drop under 15°C after dark.

The Coast and Islands

Zanzibar and the coast enjoy consistent heat, usually 25 to 32°C. The breeze keeps humidity bearable, and the "winter" is barely distinguishable from summer except for rain. Swimmers and divers find January, February, and the July to October window ideal; the rains still allow good beach days in between, since showers tend to pass quickly. For beach planning, our best time to visit Zanzibar guide is the closest thing to a cheat sheet.

The High Country and Kilimanjaro

Up high, the rule flips: cold is the issue, not heat. Night temperatures near Kilimanjaro's summit camps fall well below freezing all year, and the mountain has its own rain-shadow logic. The best time to climb and the mountains' weather by month guides cover the summit experience in detail. Days on the slopes are pleasant, but the sun is intense at altitude and the nights demand serious warmth. Below 3,000 m, Arusha and Moshi stay mild; the cold starts above the cloud line. The Kilimanjaro packing list covers the layers.

The Savannah: Where Weather Makes the Safari

On the plains, the dry season is the golden rule: animals gather around shrinking water sources, making the Serengeti and Ngorongoro spectacular from June to October. The long rains turn the same landscape lush, quiet, and beautiful in a different way, and the short rains in November bring spring-like greenery. Which is "best" is a matter of taste. Our best time for a safari compares the trade-offs fairly, and the best time to see the Big Five adds a wildlife-specific lens.

Rainfall by the Numbers

Monthly timing matters more than annual totals. Zanzibar and the northern coast collect about 1,400 to 1,600 mm a year, most of it between March and May, while Dar es Salaam records closer to 1,100 mm. Arusha and Moshi, sheltered by Kilimanjaro and Meru, average roughly 900 mm across both rainy seasons. The Serengeti plains are semi-arid at 450 to 600 mm, rising past 1,000 mm in the western corridor and Ngorongoro highlands.

Three numbers matter:

• April is the wettest month on the coast, at 250 to 350 mm
• July and August are the driest, with the parks often under 20 mm
• November brings 100 to 200 mm of short rains, mostly in afternoon bursts

Month by Month

The migration follows the rain rather than a calendar: our great migration calendar tracks the herds month by month, and the calving season guide covers February in the south.

What "Rain" Actually Means Here

Visitors imagine monsoons; Tanzania delivers passing showers. Even in the rainy seasons, mornings are often bright and storms roll through in the afternoon and evening. Roads in remote parks can become slow, which is exactly why an experienced operator with well-maintained vehicles earns their keep. The rain seasons are also the price-saver's secret, as our rainy season climbing guide shows for the mountain.

For the coast specifically, the beach months guide maps the year for island and shoreline plans.

Storms and Flooding

Two events are worth planning around.

Cyclones: the south-west Indian Ocean cyclone season runs from November to April, and Tanzania's coast occasionally catches the edge. In May 2024, Cyclone Hidaya brought heavy rain, high seas and ferry cancellations to Zanzibar and the mainland coast, the first named storm to make landfall in Tanzania in the modern record. Direct hits stay rare, but March to May is the window.

Flooding: downpours overwhelm drainage in Dar es Salaam and Stone Town, and low-lying roads flood for a few hours. Park tracks turn slick rather than deep, so drives start earlier and run longer. Keep a spare day around flights in April and May.

The Packing Translation

Weather is only useful once it becomes clothing.

• The coast and parks run on light layers: it is warm all day and cooler only after dusk
• The highlands need a proper layer: mornings and evenings on the rim are properly cold
• Kilimanjaro needs everything: warm sun at day, freezing at night, and rain in the middle
• The rains favour quick-dry fabrics, since showers arrive and evaporate
• A light poncho beats an umbrella on game drives and trails
• Sun protection is the constant, whatever the month, because the equator does not observe seasons
• A fleece and beanie cover the highlands, where rim nights drop near 5°C

Our what to pack for a Tanzania safari list turns this into a checklist organised by trip length.

Pack for the coldest night and the hottest afternoon and you have covered everything in between.

Which Month, Which Plan

A quick decision aid rather than a table.

• June to October for classic game viewing on dry ground
• January to February for the calving season in the south
• November to December for green landscapes and light crowds
• March to May for quiet parks, lower prices, and flexible plans
• Any month for the coast, with the rains only rarely disrupting beach days

The right month is dictated by the one thing you most want to do. Everything else follows.

Conclusion

Tanzania's weather is friendly far more often than travellers fear. Build your trip around the season that matches your priorities, pack layers for the altitude and sun for the plains, and trust the climate to roll through the rest. Nature is the whole point of coming, and it runs on a calendar you can now read.