Weather in Sao Tome dan Príncipe in September
Country-wide climate normals across 15 cities in Sao Tome dan Príncipe.
How Hot Is Sao Tome dan Príncipe in September?
Sao Tome dan Príncipe's September is consistently warm — typical 27°C, with no major regional outliers.
Sunshine in Sao Tome dan Príncipe in September
Limited sunshine and short daylight define Sao Tome dan Príncipe's September: São Tomé averages just 1.0h of direct sun, with the sun up between 5:30 am and 5:35 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In Sao Tome dan Príncipe In September?
Heavy seasonal rains saturate Sao Tome dan Príncipe in September — São Tomé averages 240mm of rain across 24 days, with downpours an almost daily feature. The pattern is consistent across most regions, particularly along monsoon-affected coasts. Expect torrential afternoon storms followed by humid heat.
Is Sao Tome dan Príncipe Humid In September?
Sao Tome dan Príncipe is enveloped in tropical-thick humidity through September: São Tomé averages 82%, and most of the country tracks similarly. The constant moisture makes warm temperatures feel substantially hotter, and even nights bring limited cooling. Light cotton clothing is essential.
Wind In Sao Tome dan Príncipe In September
Light breezes are typical across Sao Tome dan Príncipe in September: 16 kph in São Tomé, with similar gentle wind conditions in most regions. The air moves enough to keep things fresh on warm days but not enough to be disruptive. Coastal cities may see slightly more.
Cloud Cover In Sao Tome dan Príncipe In September
Heavy overcast covers Sao Tome dan Príncipe in September: 79% cloud cover in São Tomé, with similar grey conditions in most regions. Direct sun is rare, and the pattern is persistent across the country. Coastal and northern regions feel especially heavy.