Arusha (Kilimanjaro) weather in December

December in Arusha: warm, rainy, with clean air — a great time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Arusha🇹🇿 Tanzania · East Africa · Trekking79
  1. 77Jan
  2. 80Feb
  3. 72Mar
  4. 73Apr
  5. 87May
  6. 92Jun
  7. 94Jul
  8. 92Aug
  9. 90Sep
  10. 85Oct
  11. 78Nov
  12. 79Dec

#8 of 12 months in Arusha · #476 of 1413 destinations to visit in December · comfort 79/100 (tier B)

Days
27°C
Nights
17°C
Wet days
17
Sun
10.6 h
Humidity
71%
Daylight
12 h
Arusha, Tanzania
Photo: mn str · Pexels

Traveller notes on Arusha in December

Notes from nearby Moshi (72 km away)

Arusha doesn't have its own notes for December yet — these are about Moshi, close enough to share the season.

Forum posters describe rains on Kilimanjaro as typically running from mid-October through the end of December, sometimes into January, making December a real transition month rather than clearly wet or dry. Posters are consistent that climbing in December remains entirely workable, with light rain or none at all a real possibility - and when rain does fall, it often arrives in the late afternoon after climbers have already reached camp for the day. Posters describe base-of-mountain temperatures around 21-27C, dropping dramatically to between -7C and -29C at the summit overnight. Posters generally rate late December as a good climbing window, noting it's genuinely busy with holiday climbers, and that early December specifically carries a better chance of catching some lingering rain before the dry season fully sets in.
Tripadvisor community · December · 1 month ago · about Moshi · Read more on Tripadvisor ↗

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.
ArushaAprilRegular · April · 1 month ago · Read more on tripadvisor.co.nz ↗
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.
ArushaMarchRegular · March · 1 month ago · Read more on Tripadvisor ↗
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.
ArushaFebruaryRegular · February · 1 month ago · Read more on Tripadvisor ↗
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.
ArushaOctoberRegular · October · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Arusha's card on the map.

Arusha climate normals — December

Daytime high27°C / 80°F🌤 warm
Nighttime low17°C / 62°F
Feels like (high)28°C / 82°F
Rainfall100 mm / 3.9 in🌧 rainy
Rainy days17 days
Humidity71%💧 humid
Dew point16°C / 62°F
Sunshine10.6 h/day
Daylight12.3 h
Wind8 km/h / 5 mph
Air quality (US AQI)37🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Arusha in December

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.

Peak crowdsIndependence and Republic Day, Festive season peak, December–January long break in Tanzania(estimated)

JFMAMJJASOND

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.

JFMAMJJASOND

Best weatherFair weatherToughest weather

What's on in Arusha in December

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    The short rains

    1 Nov – 15 Dec · usuallyMonsoon

    Afternoon storms rather than all-day rain, and the dust settles out of the air. Camps stay open, prices sit between the two peaks and the light is the best of the year for photographs.

  • Holiday

    Independence and Republic Day

    9 DecNational holidayClosures

    Tanzania's national holiday, marking 1961 independence and the 1964 union with Zanzibar. Government offices, banks and many shops close for the day, though safari lodges and parks keep operating as normal. Source ↗

  • Holiday

    Festive season peak

    18 Dec – 5 Jan · usuallyChristmas & New YearCrowdedBook early

    The northern circuit's second peak. Lodges add festive supplements, the Ngorongoro and Serengeti gates are busy, and anything not booked by October has gone. Source ↗

What's on around the world in December →

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?

Loading map…

Arusha in December — FAQ

Is December a good time to visit Arusha?
December in Arusha: warm, rainy, with clean air — a great time to visit. It ranks #8 of 12 months for Arusha on SeasonMap's comfort score (79/100).
What is the weather like in Arusha in December?
In December, Arusha averages a daily high of 26.5°C and a low of 16.6°C, with about 99.9 mm of rain over roughly 17 rainy days.
What is the air quality in Arusha in December?
Arusha has a mean US Air Quality Index of about 37 in December.

Within 300 km: Amboseli's Migrants on Lake Amboseli around 15 Nov – 31 Mar, and Nairobi's Migrant bird season around 1 Nov – 15 Apr.