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Monthly climate in Sefwi Wiawso, Ghana

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sefwi Wiawso features a tropical savanna climate (Aw). Temperatures typically range between 25 °C (78 °F) and 29 °C (84 °F) through the year, but rarely can drop to 17 °C (63 °F) or can rise to as high as 38 °C (100 °F). The average annual precipitation amounts to about 1296 mm (51.0 inches) and receives 226 rainy days on the 1 mm (0.04 inches) threshold annually. Sefwi Wiawso enjoys an average of 3033 hours of sunshine throughout the year, and daylight varies from 11 hours 45 minutes to 12 hours 27 minutes per day.

Monthly average temperatures in Sefwi Wiawso, Ghana

The warmest months in Sefwi Wiawso are January, February and March, with daily mean temperatures ranging from 28 to 29 °C (82 - 84 °F) throughout the day. The coldest temperatures usually occur in July, August and September, when daily mean temperatures range from 25 to 26 °C (78 - 78 °F) throughout the day. On average each year, Sefwi Wiawso experiences 329 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sefwi Wiawso. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum36°C
(97°F)		38°C
(100°F)		38°C
(100°F)		36°C
(97°F)		35°C
(94°F)		33°C
(92°F)		31°C
(88°F)		32°C
(90°F)		32°C
(90°F)		33°C
(91°F)		34°C
(93°F)		35°C
(95°F)
Mean maximum35°C
(96°F)		37°C
(98°F)		36°C
(97°F)		35°C
(95°F)		34°C
(93°F)		32°C
(90°F)		31°C
(87°F)		31°C
(89°F)		32°C
(90°F)		32°C
(91°F)		33°C
(92°F)		34°C
(94°F)
Average high34°C
(93°F)		34°C
(94°F)		33°C
(92°F)		33°C
(91°F)		32°C
(89°F)		30°C
(86°F)		29°C
(84°F)		29°C
(84°F)		30°C
(85°F)		30°C
(87°F)		32°C
(89°F)		32°C
(90°F)
Daily mean28°C
(82°F)		29°C
(84°F)		28°C
(83°F)		28°C
(82°F)		27°C
(81°F)		26°C
(79°F)		25°C
(78°F)		25°C
(78°F)		26°C
(78°F)		26°C
(79°F)		27°C
(80°F)		27°C
(81°F)
Average low24°C
(75°F)		25°C
(77°F)		24°C
(76°F)		24°C
(76°F)		24°C
(75°F)		23°C
(74°F)		23°C
(74°F)		23°C
(73°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)		23°C
(74°F)
Mean minimum21°C
(70°F)		23°C
(73°F)		23°C
(73°F)		22°C
(72°F)		22°C
(72°F)		22°C
(72°F)		21°C
(71°F)		21°C
(70°F)		22°C
(72°F)		22°C
(72°F)		22°C
(71°F)		21°C
(71°F)
Minimum17°C
(63°F)		21°C
(70°F)		22°C
(72°F)		21°C
(71°F)		21°C
(71°F)		21°C
(71°F)		20°C
(68°F)		20°C
(68°F)		21°C
(70°F)		22°C
(71°F)		21°C
(69°F)		19°C
(66°F)

Compare climate in Sefwi Wiawso with other places

Compare temperature, precipitation, sunshine, UV index in Sefwi Wiawso, Ghana with other places around the world.

Monthly average precipitation in Sefwi Wiawso, Ghana

Sefwi Wiawso usually has the most precipitation in May, September and October, with an average of 26 rainy days and 184 mm (7.3 inches) of precipitation per month. The driest months in Sefwi Wiawso are January, February and December. On average, 27 mm (1.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sefwi Wiawso. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)16 (0.6)41 (1.6)111 (4.4)112 (4.4)156 (6.2)153 (6.0)129 (5.1)87 (3.4)202 (8.0)195 (7.7)70 (2.7)24 (0.9)
Average precipitation days (≥ 1 mm)492019242625212727177

Monthly sunshine hours in Sefwi Wiawso, Ghana

The sunniest months in Sefwi Wiawso are April, May and December, when the sun shines an average of 9 hours 7 minutes a day. Least sunny months in Sefwi Wiawso: July, August and September receive an average of 7 hours 25 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sefwi Wiawso. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours236260266275280238233230219240267283
Mean daily daylight hours11h 47m11h 54m12h 4m12h 14m12h 23m12h 27m12h 25m12h 17m12h 7m11h 57m11h 49m11h 45m

Solar UV radiation in Sefwi Wiawso, Ghana

Sefwi Wiawso experiences the highest level of ultraviolet (UV) radiation in April, May and September, when the maximum UV index can reach values of 13 - 14, which corresponds to the Extreme category of sun exposure. January, November and December are in the Very High exposure category. In these months, the maximum values of the UV index do not exceed 10. For more detailed information, check out our hourly Sefwi Wiawso UV Index data.

Average daily maximum UV levels by month for Sefwi Wiawso. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)10111214131312121312109