Mayumba, Gabon climate

Aw Tropical savanna (dry winter)

Mayumba has a remarkably steady tropical climate (Tropical savanna (dry winter), Köppen Aw). The hottest month is March with an average daily high near 28°C, while the coldest is July averaging around 21°C at night. Precipitation totals about 1641 mm a year and is strongly seasonal — December alone averages 271 mm while July barely receives 10 mm.

☀️ All year

Warm

Daytime highs near 28°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 21°C.

🌧️ Rain

Very wet

About 1641 mm of rain a year.

Wettest in December

⛅ Sky & trend

Often grey

Overcast skies dominate much of the year.

Temperature & precipitation

Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figures

Hours of sunshine per day

Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)

Mayumba climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	27	28	28	28	27	25	24	25	26	27	27	27
Avg temp (°C)	26	27	27	27	26	24	22	23	24	26	26	26
Avg low (°C)	25	26	26	26	24	22	21	21	23	24	25	25
Precipitation (mm)	234	205	178	166	89	14	10	17	40	154	261	271

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	27	28	28	28	27	25
Avg temp (°C)	26	27	27	27	26	24
Avg low (°C)	25	26	26	26	24	22
Precipitation (mm)	234	205	178	166	89	14

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	24	25	26	27	27	27
Avg temp (°C)	22	23	24	26	26	26
Avg low (°C)	21	21	23	24	25	25
Precipitation (mm)	10	17	40	154	261	271

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	79	80	80	78	69	58	62	71	77	80	82	80
Relative humidity (%)	87	86	85	87	89	87	87	85	83	83	86	88
Wind speed (mph)	6.0	6.3	6.2	5.8	5.6	5.7	5.4	6.2	7.2	7.5	7.0	6.3

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	79	80	80	78	69	58
Relative humidity (%)	87	86	85	87	89	87
Wind speed (mph)	6.0	6.3	6.2	5.8	5.6	5.7

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	62	71	77	80	82	80
Relative humidity (%)	87	85	83	83	86	88
Wind speed (mph)	5.4	6.2	7.2	7.5	7.0	6.3

Methodology & sources

Temperature & precipitation — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.

Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.

How we build these numbers →