Climate averages 1991–2020

Arusha weather
in January.

A warm, moderately wet month: the 2nd warmest and the 8th driest of the year.

Long-term climate patterns, not a forecast for a particular trip.

Average high 27.7°C Daytime mean, January

Average low 16.1°C Night-time mean, January

Rainfall 82 mm 11 days with ≥1 mm

Daylight 12 h Sunrise to sunset, per day

January is a warm month in Arusha: daytime highs average 27.7°C and nights cool to about 16.1°C. By daytime temperature it is the 2nd warmest of the 12 months.

Expect about 82 mm of rain on roughly 11 days, which makes January a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average January day.

The nearest other city in this atlas is Kondoa (198 km away). In January its highs average 27.2°C, 0.5°C cooler than Arusha, with 101 mm of rain.

Among the 43 cities listed in Tanzania, Arusha ranks 16th of 43 for the warmest January highs and 7th of 43 for the driest January (rainfall, lowest first). The mean January high of those 43 cities is 27.1°C; Arusha is 0.6°C warmer than that mean.

From January to February, average highs rise by 0.7°C to 28.4°C, and monthly rainfall falls from 82 mm to 73 mm.

The annual picture

January in context

30-year average

Average highAverage low°C

Monthly rainfall

Average total · mm

Averages 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

1991–2020

Monthly climate averages for Arusha, 1991–2020
Month	Average highHigh / low	Average low	Rainfall mm/month	Rain days ≥1 mm/day	Daylight hours/dayDaylight h/day
January, selected	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	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

January in nearby cities

Distance from Arusha

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 limits

How 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.