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Grande Riviere Weather in September
September in Grande Riviere brings high temperatures, with daytime highs of 30°C (86°F) and nights around 26°C (79°F). Quite a bit of rainfall is expected, around 155 mm (6.1 in), so pack an umbrella.
Rainfall in Grande Riviere in September
Climate statistics over the past 30 years suggest around 19 days of rain, with 155 mm (6.1 in) average for the month. Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.
Temperature in Grande Riviere in September
Expect highs of 30°C (86°F) in Grande Riviere in September, with nights dropping to around 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Grande Riviere in September
There are approximately 197 hours of sunshine this month, resulting in mostly clear days.September in Grande Riviere can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Grande Riviere Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
63%
Precipitation
155 mm (6.1 in)
Rainy days
19 days
Humidity
84% *
Sunshine
197 hours *
Percentage Sunshine
*
* Data from: Trinidad, Trinidad & Tobago (40 KM, 25 Miles).
Grande Riviere Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grande Riviere - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Grande Riviere typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Historical weather records for Grande Riviere in September
Browse day-by-day weather records for Grande Riviere spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Grande Riviere historical weather extremes in September
The extremes listed below come from historical weather data collected in Grande Riviere from 1990 through 2026.
- The warmest day in September was on September 17, 2014, with a maximum of 36°C (97°F).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 18, 1991.
- Nighttime temperatures dropped to 21°C (70°F) on September 22, 1994, marking the coldest September night on record.
Best Places in Trinidad & Tobago in September
Find out more about the weather in Trinidad & Tobago and which places have the best travel conditions in this month. See all of Trinidad & Tobago in September →
perfect weather
pleasant
tolerable
unpleasant
poor
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).
What to Wear in Grande Riviere in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Grande Riviere in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
-
Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Grande Riviere 3-Day Forecast
More climate data for Grande Riviere
Temperature Rainfall Sunshine Humidity
See the full Grande Riviere climate overview or explore weather in Trinidad & Tobago.
Popular in September
Where to go in September - average daytime high across popular destinations.
San Juan
30°C (86°F) Piarco31°C (88°F) Port-of-Spain
30°C (86°F) Crown Point
30°C (86°F) Castara30°C (86°F) Buccoo30°C (86°F) Scarborough30°C (86°F) Bon Accord Village30°C (86°F) Bucket list
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