Arima Weather in September
During September, Arima experiences very high daytime temperatures of 31°C (88°F) and cooler nights around 25°C (77°F). Expect quite a bit of rainfall. Around 146 mm (5.7 in) is typical.
Rainfall in Arima in September
Historically, September sees about 19 days of rain, with a monthly average of 146 mm (5.7 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Arima in September
In September, Arima gets very high temperatures, with highs of 31°C (88°F). Nights cool to around 25°C (77°F). Mornings and evenings are often more comfortable than the peak afternoon hours. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in Arima in September
Expect sunny days throughout the month, with an estimated 197 hours of sunshine. This makes it a pleasant time to visit Arima.
Average water temperature in September
The water temperature is 28°C (82°F), which most people find very comfortable. A good month for swimming and water sports.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Arima. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our Arima's climate page.
Arima Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Water Temperature
28°C (82°F) *
Chance of Rain
64%
Precipitation
146 mm (5.7 in)
Rainy days
19 days
Humidity
84% *
Sunshine
197 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Arima typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather for Arima in September
Browse day-by-day weather records for Arima spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Arima historical weather extremes in September
Based on 35 years of weather observations (1990-2025), these are the most extreme conditions recorded in Arima.
- On September 16, 1999, temperatures climbed to 36°C (97°F), marking the warmest September day on record.
- On September 7, 1991, Arima saw its coldest September day with temperatures maxing out at 25°C (77°F).
- Arima registered its coldest September night on September 2, 2006, with temperatures dropping to 21°C (70°F).
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 →
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What to Wear in Arima in September
Warm but pleasant conditions in Arima 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. With water temperatures around 28°C (82°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Arima in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Trinidad & Tobago, check out our Arima's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Arima climate overview or explore weather in Trinidad & Tobago.
