"Koforidua Normals 1991–2020". World Meteorological Organization Climatological Standard Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 29 September 2023. Retrieved 29 September 2023.
"Koforidua Normals 1991–2020". World Meteorological Organization Climatological Standard Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 29 September 2023. Retrieved 29 September 2023.