Visit the Rainbow Mountains
The Rainbow Mountain (Vinicunca) is acolored rainbow mountain that will steal your heart forever and the view from the top will take your breath away.
Lowlands in September sees high daytime temperatures of 30°C (86°F) and nighttime lows of 27°C (81°F). Rainfall is fairly high this month at around 134 mm (5.3 in), so pack a rain jacket to stay dry.
If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Lowlands. Our weather planner can help you explore destinations with more pleasant weather conditions.
Pick a month to see the average temperature, rainfall and sunshine in Lowlands - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Lowlands typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 27°C (81°F).
Browse day-by-day weather records for Lowlands spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Based on 36 years of weather observations (1990-2026), these are the most extreme conditions recorded in Lowlands.
Find out more about the weather in Sint Maarten and which places have the best travel conditions in this month. See all of Sint Maarten in September →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
Warm but pleasant conditions in Lowlands in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Lowlands climate overview or explore weather in Sint Maarten.
Where to go in September - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
Visit the Rainbow Mountains
The Rainbow Mountain (Vinicunca) is acolored rainbow mountain that will steal your heart forever and the view from the top will take your breath away.
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