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San Fernando Weather in September
Thinking of visiting San Fernando in September? Expect very high temperatures reaching 31°C (88°F) during the day, dropping to 25°C (77°F) at night, and note that quite a bit of rainfall is likely.
Rainfall in San Fernando in September
Typically, about 17 days will experience rainfall, with an average of 140 mm (5.5 in) for the month. Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in San Fernando in September
Daytime highs in San Fernando in September reach 31°C (88°F), with nights around 25°C (77°F). The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. Nights are warm at 25°C (77°F). It's worth making sure your accommodation has decent ventilation or air conditioning.
Sunshine in San Fernando in September
The days are predominantly sunny, with an estimated total of around 197 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit San Fernando. Our weather planner can help you explore destinations with more pleasant weather conditions.
San Fernando Temperature in September
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Chance of Rain
58%
Precipitation
140 mm (5.5 in)
Rainy days
17 days
Humidity
84% *
Sunshine
197 hours *
Percentage Sunshine
*
* Data from: Trinidad, Trinidad & Tobago (39 KM, 24 Miles).
San Fernando Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Fernando - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in San Fernando 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 records for San Fernando in September
Browse day-by-day weather records for San Fernando spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Fernando historical weather extremes in September
The extremes listed below come from historical weather data collected in San Fernando from 1990 through 2025.
- San Fernando recorded its highest September temperature of 36°C (97°F) on September 16, 1999.
- San Fernando experienced its chilliest September day on September 7, 1991, reaching only 25°C (77°F).
- Nighttime temperatures dropped to 21°C (70°F) on September 2, 2006, 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 San Fernando 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. Prepare for significant rainfall with proper waterproof clothing and shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in San Fernando 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
San Fernando 3-Day Forecast
More climate data for San Fernando
Temperature Rainfall Sunshine Humidity
See the full San Fernando 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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