Arusha (Kilimanjaro) weather in May
May in Arusha: warm, a little rain, with clean air — an excellent time to visit.
Updated September 2026 · climate normals from ERA5 reanalysis
#5 of 12 months in Arusha · #309 of 1413 destinations to visit in May · comfort 87/100 (tier A)
- Days
- 23°C
- Nights
- 17°C
- Wet days
- 10
- Sun
- 9.7 h
- Humidity
- 81%
- Daylight
- 12 h

Traveller notes on Arusha in May
Other months in Arusha
Arusha-forum threads on an April visit describe nights as genuinely cool, posters naming a range of thirteen to eighteen degrees with the Ngorongoro Crater rim dropping as low as eleven. Regulars call daytime genuinely comfortable by contrast, several posters naming twenty-five to twenty-eight degrees as standard and recommending shorts and sandals with a fleece for evenings. Posters call April genuinely peak long-rains season, several regulars naming rain most days but rarely lasting all day, with animals still visible and storm-cloud light making for vivid photography. Regulars call a lightweight quick-drying rain poncho genuinely handy, several threads naming this as most lodges only supply umbrellas. Posters recommend long trousers and sleeves in the evening, several regulars calling this standard given real mosquito activity after dark. The record: 24.8C days, 17.7C nights, an extraordinarily high 156mm across nearly 24 days and 82 percent humidity.
Arusha-forum threads on March weather describe conditions as genuinely warm, posters calling showers a real possibility though not the day-after-day monsoonal pattern some travelers expect. Regulars call the migration positioned in the Ndutu area of the southern Serengeti this month, a real factor for anyone planning a March safari through an Arusha-based operator. Posters recommend Arusha primarily as a safari staging point rather than a standalone destination, several regulars describing limited standalone attractions in the town itself. Regulars recommend confirming guide and driver credentials directly before booking, multiple threads specifically discussing reputable operator recommendations. Posters recommend real insect protection regardless of the season, mosquitoes flagged repeatedly as a standing concern in and around town. The record: 27.7C days feeling like 30C, 17.2C nights, an extraordinarily high 144.7mm across nearly 15 days and 71 percent humidity.
Arusha-forum threads on February weather describe mornings and late evenings as genuinely cool, posters calling a fleece or light jacket standing advice for early safari departures even though afternoons warm up considerably. Regulars call this generally still a strong month for wildlife viewing and calving season further into the Serengeti and Ndutu, though Tarangire specifically gets more consistent rain and is sometimes recommended against this time of year. Posters describe conditions as a real mix of sun and passing showers, nothing that should derail a planned day. Regulars call Ngorongoro and the Serengeti the more consistently recommended options over Tarangire. Posters recommend a lightweight rain jacket alongside warmer layers for chilly mornings, both genuinely useful across a single day. Regulars call Arusha a comfortable, practical base for onward logistics. The record: 28C days feeling like 30C, 16.5C nights, 67.6mm across over 8 days and 63 percent humidity.
Arusha-forum threads on views of Kilimanjaro from town are candid a clear sighting is genuinely rare, the mountain usually shrouded in cloud even on an otherwise sunny day. Posters describe October conditions in Arusha as comfortably warm, the wetter pattern building through the second half of the month still mostly holding off in the first couple weeks. Regulars call October a real transition, the short rains typically arriving mid-month on the mountain and pushing anyone climbing toward real rain gear regardless of a favorable forecast at sea level. Posters recommend layering for the safari drives, mornings noticeably cooler than the warm midday sun suggests. Regulars call Arusha's role as the gateway town the genuine draw, most visitors passing through en route to the parks or a Kilimanjaro attempt. Posters recommend an early-October trip over late for the better odds. The record: 26.6C days feeling like 27C, 16.2C nights, 65 percent humidity and 10.8 hours of sun.
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Arusha climate normals — May
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Arusha in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Shoulder seasonschool holidays in 3 of the markets that fill it, an ordinary month(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Arusha's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherArusha's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Arusha in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
The long rains
15 Mar – 31 May · usuallyMonsoonThe masika rains close a good part of the northern circuit and the town goes quiet with them. Operators discount hard, and Arusha itself stays perfectly workable; it is the parks that turn to mud.
Nearby, and something's on
Within 300 km of Arusha — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Arusha?
Arusha in May — FAQ
- Is May a good time to visit Arusha?
- May in Arusha: warm, a little rain, with clean air — an excellent time to visit. It ranks #5 of 12 months for Arusha on SeasonMap's comfort score (87/100).
- What is the weather like in Arusha in May?
- In May, Arusha averages a daily high of 23.1°C and a low of 16.8°C, with about 37.9 mm of rain over roughly 10.1 rainy days.
- What is the air quality in Arusha in May?
- Arusha has a mean US Air Quality Index of about 38 in May.
Within 300 km: Serengeti's Grumeti River crossings around 15 May – 10 Jul, and Amboseli's The long rains around 15 Mar – 20 May.