Climate averages 1991–2020
Arusha weather
in December.
A warm, wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a warm month in Arusha: daytime highs average 26.4°C and nights cool to about 16.1°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 108 mm of rain on roughly 17 days, which makes December a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 19 min on an average December day.
The nearest other city in this atlas is Kondoa (198 km away). In December its highs average 27.4°C, 1.0°C warmer than Arusha, with 81 mm of rain.
Among the 43 cities listed in Tanzania, Arusha ranks 24th of 43 for the warmest December highs and 13th of 43 for the driest December (rainfall, lowest first). The mean December high of those 43 cities is 27.1°C; Arusha is 0.7°C cooler than that mean.
From December to January, average highs rise by 1.3°C to 27.7°C, and monthly rainfall falls from 108 mm to 82 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Arusha climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.7°C16.1°C | 16.1°C | 82 | 10.6 | 12.312 h |
| February | 28.4°C16.5°C | 16.5°C | 73 | 9.0 | 12.212 h |
| March | 27.2°C16.8°C | 16.8°C | 143 | 16.7 | 12.112 h |
| April | 24.3°C16.7°C | 16.7°C | 145 | 21.7 | 12.012 h |
| May | 22.6°C15.2°C | 15.2°C | 50 | 11.9 | 12.012 h |
| June | 21.7°C13.0°C | 13.0°C | 6.6 | 2.3 | 11.912 h |
| July | 21.5°C11.9°C | 11.9°C | 3.9 | 1.1 | 11.912 h |
| August | 22.8°C12.7°C | 12.7°C | 3.6 | 1.1 | 12.012 h |
| September | 25.0°C13.7°C | 13.7°C | 4.1 | 1.1 | 12.112 h |
| October | 26.2°C15.2°C | 15.2°C | 30 | 7.3 | 12.212 h |
| November | 26.0°C16.2°C | 16.2°C | 103 | 17.7 | 12.312 h |
| December, selected | 26.4°C16.1°C | 16.1°C | 108 | 16.7 | 12.312 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Kondoa in DecemberTanzania · 198 kmHigh 27.4°C · Low 17.0°C · 81 mm rain
- Kitengela in DecemberKenya · 212 kmHigh 23.7°C · Low 15.2°C · 69 mm rain
- Ongata Rongai in DecemberKenya · 219 kmHigh 23.5°C · Low 14.5°C · 45 mm rain
- Mlolongo in DecemberKenya · 221 kmHigh 23.7°C · Low 14.7°C · 69 mm rain
- Ngong in DecemberKenya · 224 kmHigh 23.6°C · Low 13.7°C · 47 mm rain
- Nairobi in DecemberKenya · 232 kmHigh 24.0°C · Low 14.4°C · 47 mm rain
- Kikuyu in DecemberKenya · 236 kmHigh 22.1°C · Low 12.7°C · 47 mm rain
- Mwala in DecemberKenya · 240 kmHigh 24.7°C · Low 16.7°C · 80 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Arusha) is explained once on the Arusha year overview and on the Sources, method and limits page.