Climate averages 1991–2020
Port of Spain weather
in September.
A hot, wet month: one of the warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Port of Spain: daytime highs average 29.2°C and nights cool to about 26.0°C. By daytime temperature it is one of the warmest months of the year.
Expect about 101 mm of rain on roughly 21 days, which makes September a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 12 min on an average September day.
The nearest other city in this atlas is Saint George's (156 km away). In September its highs average 28.4°C, 0.7°C cooler than Port of Spain, with 143 mm of rain.
From September to October, average highs fall by 0.3°C to 28.9°C, and monthly rainfall rises from 101 mm to 111 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Port of Spain climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.4°C24.4°C | 24.4°C | 46 | 10.9 | 11.612 h |
| February | 27.7°C24.4°C | 24.4°C | 21 | 6.6 | 11.812 h |
| March | 28.3°C24.7°C | 24.7°C | 19 | 4.7 | 12.112 h |
| April | 29.0°C25.3°C | 25.3°C | 23 | 4.9 | 12.412 h |
| May | 29.2°C25.7°C | 25.7°C | 46 | 9.8 | 12.613 h |
| June | 28.5°C25.4°C | 25.4°C | 103 | 19.2 | 12.713 h |
| July | 28.2°C25.3°C | 25.3°C | 125 | 24.2 | 12.713 h |
| August | 28.6°C25.6°C | 25.6°C | 135 | 25.1 | 12.512 h |
| September, selected | 29.2°C26.0°C | 26.0°C | 101 | 20.7 | 12.212 h |
| October | 28.9°C25.9°C | 25.9°C | 111 | 21.8 | 11.912 h |
| November | 28.2°C25.4°C | 25.4°C | 124 | 22.6 | 11.612 h |
| December | 27.6°C24.9°C | 24.9°C | 85 | 17.1 | 11.512 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Saint George's in SeptemberGrenada · 156 kmHigh 28.4°C · Low 26.4°C · 143 mm rain
- Tucupita in SeptemberVenezuela · 188 kmHigh 31.3°C · Low 23.9°C · 89 mm rain
- Carúpano in SeptemberVenezuela · 190 kmHigh 31.6°C · Low 24.7°C · 52 mm rain
- Maturín in SeptemberVenezuela · 209 kmHigh 31.0°C · Low 23.2°C · 97 mm rain
- Porlamar in SeptemberVenezuela · 259 kmHigh 28.8°C · Low 26.5°C · 36 mm rain
- Kingstown in SeptemberSaint Vincent and the Grenadines · 279 kmHigh 28.7°C · Low 26.6°C · 141 mm rain
- Ciudad Guayana in SeptemberVenezuela · 285 kmHigh 31.3°C · Low 23.3°C · 112 mm rain
- Cumaná in SeptemberVenezuela · 292 kmHigh 29.4°C · Low 24.5°C · 71 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Port of Spain) is explained once on the Port of Spain year overview and on the Sources, method and limits page.