Sunyani, Ghana climate

As Tropical savanna (dry summer)

Sunyani has a remarkably steady tropical climate (Tropical savanna (dry summer), Köppen As). The hottest month is March with an average daily high near 95°F, while the coldest is August averaging around 71°F at night. Precipitation totals about 35 inches a year and is strongly seasonal — June alone averages 5.2 inches while January barely receives 0.20 inches.

☀️ All year

Very hot

Daytime highs near 95°F most of the year.

🌙 Nights

Stays warm

Even the coolest nights stay near 71°F.

🌧️ Rain

Moderate rainfall

About 35 in of rain a year.

Wettest in June

⛅ 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)

Sunyani climate normals (1991–2020)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	94	96	95	92	90	86	83	82	85	88	91	92
Avg temp (°F)	82	85	85	83	82	79	77	77	78	80	81	81
Avg low (°F)	69	73	74	74	73	72	71	71	71	71	72	69
Precipitation (in)	0.2	1.0	2.6	4.2	4.8	5.2	3.3	2.7	5.0	4.9	1.1	0.5

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Avg high (°F)	94	96	95	92	90	86
Avg temp (°F)	82	85	85	83	82	79
Avg low (°F)	69	73	74	74	73	72
Precipitation (in)	0.2	1.0	2.6	4.2	4.8	5.2

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Avg high (°F)	83	82	85	88	91	92
Avg temp (°F)	77	77	78	80	81	81
Avg low (°F)	71	71	71	71	72	69
Precipitation (in)	3.3	2.7	5.0	4.9	1.1	0.5

Sky & atmosphere

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	27	39	61	67	67	67	73	77	74	58	39	26
Relative humidity (%)	43	45	61	72	78	83	84	84	85	83	74	57
Wind speed (mph)	4.6	4.9	5.1	5.1	4.6	4.5	5.1	5.2	3.7	3.2	3.2	3.8

Jan – Jun	Jan	Feb	Mar	Apr	May	Jun
Cloud cover (%)	27	39	61	67	67	67
Relative humidity (%)	43	45	61	72	78	83
Wind speed (mph)	4.6	4.9	5.1	5.1	4.6	4.5

Jul – Dec	Jul	Aug	Sep	Oct	Nov	Dec
Cloud cover (%)	73	77	74	58	39	26
Relative humidity (%)	84	84	85	83	74	57
Wind speed (mph)	5.1	5.2	3.7	3.2	3.2	3.8

Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 24 years of daily observations at Bondoukou/soko, a weather station, about 94 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 →