Weather in サン・バルテルミー島 in 9月
Country-wide climate normals across 13 cities in サン・バルテルミー島.
How Hot Is サン・バルテルミー島 in 9月?
サン・バルテルミー島 bakes evenly in September — highs around 29°C are typical from Toiny all the way to Toiny, with very little regional variation. Lows sit around 27°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 サン・バルテルミー島 in 9月
Limited sunshine and short daylight define サン・バルテルミー島's September: Gustavia averages just 1.8h of direct sun, with the sun up between 6:00 am and 6:10 pm. The grey, overcast pattern is consistent across most of the country, with little regional variation in cloud cover.
Does It Rain In サン・バルテルミー島 In 9月?
サン・バルテルミー島's September is wet across most regions: 140mm in Gustavia across 17 days, with rain falling on most days of the month. Coastal and highland regions can see significantly more, while interior regions may stay slightly drier. Sunny stretches are brief and uncommon.
Is サン・バルテルミー島 Humid In 9月?
Saturated air defines サン・バルテルミー島's September: humidity at 76% in Gustavia, 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 サン・バルテルミー島 In 9月
Breezy conditions cover サン・バルテルミー島's September: Gustavia sits at 27 kph on average, with the country as a whole feeling windy through the day. Afternoon winds pick up across most cities, and coastal regions often run significantly higher.
Cloud Cover In サン・バルテルミー島 In 9月
Cloudy skies dominate サン・バルテルミー島 in September — 73% cover in Gustavia, with similar overcast conditions in most regions. Direct sun is patchy and broken; expect grey stretches between brief bright moments. Coastal areas may be heavier than inland.