Weather in Kosta Rika in September
Country-wide climate normals across 15 cities in Kosta Rika.
How Hot Is Kosta Rika in September?
Kosta Rika's September is consistently warm — typical 26°C, with no major regional outliers.
Sunshine in Kosta Rika in September
Dark, overcast days dominate Kosta Rika in September — Limón sees just 0.6h of sun a day, and the pattern is similar across most regions. Cloud cover is heavy and persistent, with even the brighter regions struggling to escape the gloom for long.
Does It Rain In Kosta Rika In September?
Heavy seasonal rains saturate Kosta Rika in September — Limón averages 470mm of rain across 29 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 Kosta Rika Humid In September?
Kosta Rika is enveloped in tropical-thick humidity through September: Limón averages 87%, 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 Kosta Rika In September
Kosta Rika's air is mostly calm in September: Limón averages 8 kph, similar across the country. Only coastal and exposed regions see slightly more breeze. Most days feel still and untroubled.
Cloud Cover In Kosta Rika In September
Heavy overcast covers Kosta Rika in September: 80% cloud cover in Limón, 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.