Mahajanga climate

Name: Mahajanga
Address: MG

Mahajanga is warmest in October, with average highs of 33 °C, and coldest in July, when nights average 21 °C. January is the wettest month (419 mm) and June the driest (0.9 mm). Figures are 1991–2020 climate normals.

Across a full year Mahajanga averages 1,340 mm of rain and 365 days above 25 °C.

Madagascar · population 260,556 · 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 October 33 °C
Coldest month July 21 °C
Driest month June 1 mm
Wettest month January 419 mm
Least cloud September 18 % cloud
Hottest on record October 38 °C
Coldest on record August 17 °C
Warmest sea March 30 °C

What to expectMahajanga through the year

Mahajanga changes little through the year. Average daily highs stay between 30 and 33 °C, so no month stands out as a season in the way it would further from the equator.

Counted across a normal year, 365 days a year reach 25 °C, 284 of them reach 30 °C. The warmest reading in the 1991–2020 record is 38 °C, in October.

Rain is strongly seasonal. January averages 419 mm against 1 mm in June — 485 times as much. Planning around the dry months matters more here than planning around temperature.

The sea off Mahajanga is warmest in March at 30 °C and coldest in August at 25 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.

Month by month

Month	Avg high	Rainfall	Cloud
January	29.7 °C	419 mm	84 %
February	29.7 °C	315 mm	80 %
March	30.7 °C	210 mm	65 %
April	31.9 °C	45 mm	37 %
May	31.8 °C	8 mm	24 %
June	30.6 °C	1 mm	22 %
July	30.2 °C	2 mm	22 %
August	31.2 °C	1 mm	20 %
September	32.6 °C	3 mm	18 %
October	33.5 °C	19 mm	24 %
November	32.8 °C	92 mm	44 %
December	31.2 °C	225 mm	68 %

Temperature month by month

Month	Avg high	Avg low	Mean	Record high	Record low	Days above 25 °C	Days above 30 °C
January	29.7 °C	24.4 °C	26.7 °C	34.5 °C	22.9 °C	31	14
February	29.7 °C	24.4 °C	26.7 °C	33.0 °C	22.7 °C	28	13
March	30.7 °C	24.6 °C	27.3 °C	34.2 °C	22.1 °C	31	22
April	31.9 °C	24.4 °C	27.8 °C	35.0 °C	20.9 °C	30	28
May	31.8 °C	23.3 °C	27.2 °C	34.6 °C	18.7 °C	31	29
June	30.6 °C	21.6 °C	25.8 °C	33.0 °C	18.4 °C	30	21
July	30.2 °C	20.6 °C	25.1 °C	33.7 °C	17.6 °C	31	19
August	31.2 °C	20.9 °C	25.7 °C	34.2 °C	17.3 °C	31	28
September	32.6 °C	21.9 °C	26.6 °C	36.7 °C	18.0 °C	30	29
October	33.5 °C	23.5 °C	27.8 °C	37.6 °C	19.5 °C	31	30
November	32.8 °C	24.4 °C	28.0 °C	36.8 °C	21.4 °C	30	27
December	31.2 °C	24.5 °C	27.5 °C	36.2 °C	22.7 °C	31	23

Rain, sun and wind month by month

Month	Rainfall	Wet days	Daylight	Cloud cover	Humidity	Wind	Sea temp
January	419 mm	28	13 h/day	84 %	84 %	15 km/h	29.4 °C
February	315 mm	24	13 h/day	80 %	85 %	14 km/h	29.4 °C
March	210 mm	21	12 h/day	65 %	81 %	14 km/h	29.6 °C
April	45 mm	9	12 h/day	37 %	72 %	14 km/h	29.5 °C
May	8 mm	1	11 h/day	24 %	63 %	15 km/h	28.4 °C
June	1 mm	0	11 h/day	22 %	56 %	17 km/h	26.8 °C
July	2 mm	0	11 h/day	22 %	53 %	18 km/h	25.6 °C
August	1 mm	0	12 h/day	20 %	52 %	19 km/h	25.4 °C
September	3 mm	1	12 h/day	18 %	55 %	19 km/h	25.9 °C
October	19 mm	4	12 h/day	24 %	59 %	19 km/h	27.2 °C
November	92 mm	14	13 h/day	44 %	68 %	17 km/h	28.5 °C
December	225 mm	24	13 h/day	68 %	77 %	14 km/h	29.3 °C

Where Mahajanga ranks

Ranking	Position	Value
Warmest sea temperatures in Africa in December	1stof 50	29 °C
Warmest sea temperatures in Africa in January	1stof 50	29 °C
Warmest sea temperatures in Africa in March	1stof 50	30 °C
Warmest sea temperatures in Africa in April	2ndof 50	30 °C
Warmest sea temperatures in Africa in February	2ndof 50	29 °C
Warmest sea temperatures in Africa year-round	6thof 50	28 °C

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

QuestionsCommon questions about Mahajanga’s climate

When is the best time to visit Mahajanga?

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

How hot does Mahajanga get?

In October, the warmest month, daily highs average 33 °C. About 284 days a year pass 30 °C. The highest value in the 1991–2020 record is 38 °C.

How cold does it get in winter?

Nights average 21 °C in July, the coldest month. Freezing nights are not part of a normal year here.

Which month is wettest in Mahajanga?

January, averaging 419 mm over 28 days with rain. The driest month is June with 1 mm. The year as a whole averages 1,340 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 Mahajanga 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.