Weather in Porto Rico in setembro
Country-wide climate normals across 15 cities in Porto Rico.
How Hot Is Porto Rico in setembro?
Porto Rico bakes evenly in September — highs around 31°C are typical from Fajardo all the way to Guaynabo, with very little regional variation. Lows sit around 25°C even overnight, and the country's small geographic footprint means there are no significant climate pockets. Expect uniform heat day and night.
Sunshine in Porto Rico in setembro
Persistent cloud and grey skies define Porto Rico's September: about 1.0h of sun a day in San Juan. Daylight is in short supply too, running from 6:10 am to 6:25 pm, and most regions of the country see similar overcast conditions. Bright stretches are uncommon and brief.
Does It Rain In Porto Rico In setembro?
Heavy seasonal rains saturate Porto Rico in September — San Juan averages 208mm of rain across 23 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 Porto Rico Humid In setembro?
Heavy oppressive humidity covers Porto Rico in September: 78% on average in San Juan, and similar saturating conditions exist nationwide. The air feels thick and heavy from sunrise to sundown, with little overnight respite. Coastal and tropical regions feel especially stifling.
Wind In Porto Rico In setembro
Porto Rico's September has gentle wind — San Juan averages 18 kph, and the country tracks similarly. Outdoor activity is comfortable, and afternoon thermals add a pleasant breeze in inland areas.
Cloud Cover In Porto Rico In setembro
Porto Rico's September is dominated by overcast skies: San Juan averages 78% cloud cover, with similar grey persistence across the country. Days feel dim and soft-lit, with little break in the cloud deck.