Weather in Portorico in settembre
Country-wide climate normals across 15 cities in Portorico.
How Hot Is Portorico in settembre?
Portorico 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 Portorico in settembre
Limited sunshine and short daylight define Portorico's September: San Juan averages just 1.0h of direct sun, with the sun up between 6:10 am and 6:25 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In Portorico In settembre?
Heavy seasonal rains saturate Portorico 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 Portorico Humid In settembre?
Saturated air defines Portorico's September: humidity at 78% in San Juan, with the country as a whole feeling muggy and oppressive. The air practically drips after rain, and even shaded outdoor areas feel warm and clammy. Plan indoor time during the most humid afternoon hours.
Wind In Portorico In settembre
Portorico'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 Portorico In settembre
Heavy overcast covers Portorico in September: 78% cloud cover in San Juan, 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.