Weather in Puerto Rico in september
Country-wide climate normals across 15 cities in Puerto Rico.
How Hot Is Puerto Rico in september?
Puerto Rico sees consistently hot September weather — average highs of 31°C, average lows of 25°C, with minimal regional differences. Whether you're in San Juan or one of the coastal cities, conditions feel broadly the same: hot, generally clear, with little night-time relief.
Sunshine in Puerto Rico in september
Limited sunshine and short daylight define Puerto Rico'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 Puerto Rico In september?
Puerto Rico is in the heart of its rainy season: San Juan measures 208mm of rain across 23 days in September, and the pattern repeats across nearly all regions. Persistent heavy rain, occasional thunderstorms, and saturated air define the entire country's weather.
Is Puerto Rico Humid In september?
Puerto Rico is enveloped in tropical-thick humidity through September: San Juan averages 78%, 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 Puerto Rico In september
Light breezes are typical across Puerto Rico in September: 18 kph in San Juan, 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 Puerto Rico In september
Puerto 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.