Kasulu climate

Name: Kasulu
Address: TZ

Kasulu is warmest in September, with average highs of 30 °C, and coldest in July, when nights average 16 °C. December is the wettest month (256 mm) and July the driest (2.3 mm). Figures are 1991–2020 climate normals.

Across a full year Kasulu averages 1,540 mm of rain and 291 days above 25 °C.

Tanzania · population 238,321 · 1991–2020 normals

Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month

Warmest month September 30 °C
Coldest month July 16 °C
Driest month July 2 mm
Wettest month December 256 mm
Least cloud July 42 % cloud
Hottest on record October 34 °C
Coldest on record July 12 °C

What to expectKasulu through the year

Kasulu changes little through the year. Average daily highs stay between 27 and 30 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 291 days a year reach 25 °C, 30 of them reach 30 °C. The warmest reading in the 1991–2020 record is 34 °C, in October.

Rain is strongly seasonal. December averages 256 mm against 2 mm in July — 109 times as much. Planning around the dry months matters more here than planning around temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	25.4 °C	231 mm	85 %
February	26.0 °C	189 mm	83 %
March	25.9 °C	212 mm	84 %
April	25.4 °C	166 mm	82 %
May	26.0 °C	66 mm	65 %
June	26.8 °C	14 mm	51 %
July	27.4 °C	2 mm	42 %
August	28.8 °C	9 mm	45 %
September	29.9 °C	35 mm	56 %
October	28.3 °C	131 mm	77 %
November	25.8 °C	228 mm	87 %
December	25.1 °C	256 mm	86 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	25.4 °C	17.1 °C	20.7 °C	29.2 °C	15.0 °C	20	0
February	26.0 °C	17.4 °C	21.1 °C	31.0 °C	15.4 °C	21	0
March	25.9 °C	17.5 °C	21.1 °C	30.0 °C	14.9 °C	23	0
April	25.4 °C	17.4 °C	20.9 °C	29.1 °C	15.3 °C	20	0
May	26.0 °C	17.2 °C	21.2 °C	29.8 °C	14.1 °C	25	0
June	26.8 °C	16.1 °C	21.0 °C	29.4 °C	13.0 °C	28	0
July	27.4 °C	15.6 °C	21.1 °C	30.4 °C	11.9 °C	30	0
August	28.8 °C	16.7 °C	22.4 °C	32.1 °C	13.1 °C	31	5
September	29.9 °C	17.8 °C	23.5 °C	33.9 °C	14.6 °C	30	15
October	28.3 °C	18.1 °C	22.7 °C	34.0 °C	14.8 °C	28	9
November	25.8 °C	17.4 °C	21.1 °C	31.6 °C	15.1 °C	20	1
December	25.1 °C	17.0 °C	20.5 °C	28.3 °C	14.9 °C	16	0

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind
January	231 mm	28	12 h/day	85 %	85 %	8.5 km/h
February	189 mm	24	12 h/day	83 %	83 %	9.0 km/h
March	212 mm	27	12 h/day	84 %	84 %	9.0 km/h
April	166 mm	23	12 h/day	82 %	83 %	11 km/h
May	66 mm	10	12 h/day	65 %	74 %	13 km/h
June	14 mm	3	12 h/day	51 %	64 %	13 km/h
July	2 mm	1	12 h/day	42 %	56 %	14 km/h
August	9 mm	2	12 h/day	45 %	52 %	14 km/h
September	35 mm	6	12 h/day	56 %	54 %	14 km/h
October	131 mm	17	12 h/day	77 %	67 %	12 km/h
November	228 mm	25	12 h/day	87 %	80 %	9.5 km/h
December	256 mm	29	12 h/day	86 %	85 %	8.4 km/h

How Kasulu compares

The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.

Destination	Summer high	Winter low	Rain per year	Days above 25 °C
Kasulu	30 °C	16 °C	1,540 mm	291
Kigoma · Tanzania	28 °C	22 °C	1,808 mm	333
Gitega · Burundi	26 °C	14 °C	758 mm	70
Bujumbura · Burundi	28 °C	22 °C	475 mm	344
Uvira · Democratic Republic of the Congo	28 °C	22 °C	499 mm	350
Kalemie · Democratic Republic of the Congo	30 °C	20 °C	1,133 mm	344
Mpanda · Tanzania	32 °C	15 °C	909 mm	346

Planning a trip? See the best time to visit Kasulu.

QuestionsCommon questions about Kasulu’s climate

When is the best time to visit Kasulu?

That depends on what you want, so the honest answer is a comparison rather than a single month. January, April, December sit closest to 20 °C on average, September is the warmest month and July the driest. The month-by-month table above has the full picture.

How hot does Kasulu get?

In September, the warmest month, daily highs average 30 °C. About 30 days a year pass 30 °C. The highest value in the 1991–2020 record is 34 °C.

How cold does it get in winter?

Nights average 16 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Kasulu?

December, averaging 256 mm over 29 days with rain. The driest month is July with 2 mm. The year as a whole averages 1,540 mm.

Are these figures a forecast?

No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Kasulu rather than what any particular week will bring. Individual years can differ substantially from the normal.

Data sources and method

ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
Open-Meteo — Open-Meteo.com. CC BY 4.0
NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
GeoNames — GeoNames.org. CC BY 4.0

Normal period: 1991–2020
Dataset version: era5-1991-2020-scores1.1
Last processed: 1 August 2026

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.