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Bolgatanga, Ghana climate

As Tropical savanna (dry summer)

Bolgatanga has a mildly seasonal tropical climate (Tropical savanna (dry summer), Köppen As). The hottest month is March with an average daily high near 40°C, while the coldest is August averaging around 23°C at night. Precipitation totals about 586 mm a year and is strongly seasonal — July alone averages 176 mm while January barely receives 0 mm.

☀️ All year

Very hot

Daytime highs near 40°C most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 23°C.

🌧️ Rain

Moderate rainfall

About 586 mm of rain a year.

Wettest in July

⛅ Sky & trend

Partly cloudy

A roughly even mix of sun and cloud.

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)

Bolgatanga climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	35	38	40	38	36	34	32	31	32	35	37	36
Avg temp (°C)	28	31	33	33	31	29	28	27	27	29	29	28
Avg low (°C)	20	23	27	27	25	24	23	23	23	23	21	20
Precipitation (mm)	0	0	18	47	119	—	176	—	138	82	6	0

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°C)	35	38	40	38	36	34
Avg temp (°C)	28	31	33	33	31	29
Avg low (°C)	20	23	27	27	25	24
Precipitation (mm)	0	0	18	47	119	—

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°C)	32	31	32	35	37	36
Avg temp (°C)	28	27	27	29	29	28
Avg low (°C)	23	23	23	23	21	20
Precipitation (mm)	176	—	138	82	6	0

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	23	30	57	69	70	62	71	78	70	51	27	20
Relative humidity (%)	39	34	43	60	71	77	83	86	84	80	64	50
Wind speed (mph)	5.7	5.7	5.0	5.9	5.4	4.6	4.1	3.7	2.8	2.8	3.1	4.6

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	23	30	57	69	70	62
Relative humidity (%)	39	34	43	60	71	77
Wind speed (mph)	5.7	5.7	5.0	5.9	5.4	4.6

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	71	78	70	51	27	20
Relative humidity (%)	83	86	84	80	64	50
Wind speed (mph)	4.1	3.7	2.8	2.8	3.1	4.6

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 22 years of daily observations at Mango/sansanne, a weather station, about 151 km from the city centre. The underlying daily records come from NOAA's global station network.

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 →