Climate averages 1991–2020
Santo Domingo weather
in September.
A hot, wet month: the 3rd warmest and the joint 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Santo Domingo: daytime highs average 29.9°C and nights cool to about 23.4°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 120 mm of rain on roughly 21 days, which makes September a wet month (the joint 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 15 min on an average September day.
The nearest other city in this atlas is Santo Domingo Este (5 km away). In September its highs average 29.4°C, about as warm as Santo Domingo, with 148 mm of rain.
Among the 14 cities listed in the Dominican Republic, Santo Domingo ranks joint 9th of 14 for the warmest September highs and joint 8th of 14 for the driest September (rainfall, lowest first). The mean September high of those 14 cities is 30.4°C; Santo Domingo is 0.5°C cooler than that mean.
From September to October, average highs fall by 0.7°C to 29.3°C, and monthly rainfall falls from 120 mm to 115 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
Santo Domingo climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.5°C20.4°C | 20.4°C | 32 | 11.8 | 11.211 h |
| February | 27.9°C20.4°C | 20.4°C | 30 | 10.5 | 11.512 h |
| March | 28.4°C20.7°C | 20.7°C | 37 | 11.9 | 12.012 h |
| April | 29.1°C21.6°C | 21.6°C | 62 | 15.2 | 12.613 h |
| May | 29.3°C22.5°C | 22.5°C | 120 | 21.3 | 13.013 h |
| June | 29.8°C23.1°C | 23.1°C | 107 | 21.6 | 13.213 h |
| July | 30.3°C23.4°C | 23.4°C | 108 | 21.1 | 13.113 h |
| August | 30.3°C23.6°C | 23.6°C | 129 | 21.3 | 12.813 h |
| September, selected | 29.9°C23.4°C | 23.4°C | 120 | 21.0 | 12.312 h |
| October | 29.3°C23.0°C | 23.0°C | 115 | 21.5 | 11.712 h |
| November | 28.3°C22.2°C | 22.2°C | 75 | 15.9 | 11.311 h |
| December | 27.7°C21.1°C | 21.1°C | 39 | 11.4 | 11.011 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
- Santo Domingo Este in SeptemberDominican Republic · 5 kmHigh 29.4°C · Low 23.9°C · 148 mm rain
- Santo Domingo Oeste in SeptemberDominican Republic · 12 kmHigh 29.9°C · Low 22.9°C · 120 mm rain
- San Cristóbal in SeptemberDominican Republic · 23 kmHigh 29.9°C · Low 23.3°C · 120 mm rain
- San Pedro de Macorís in SeptemberDominican Republic · 62 kmHigh 30.1°C · Low 25.4°C · 122 mm rain
- Bonao in SeptemberDominican Republic · 76 kmHigh 30.4°C · Low 22.2°C · 149 mm rain
- La Romana in SeptemberDominican Republic · 98 kmHigh 31.2°C · Low 24.8°C · 96 mm rain
- San Francisco de Macorís in SeptemberDominican Republic · 99 kmHigh 31.8°C · Low 22.2°C · 72 mm rain
- La Vega in SeptemberDominican Republic · 107 kmHigh 31.6°C · Low 22.2°C · 61 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 Santo Domingo) is explained once on the Santo Domingo year overview and on the Sources, method and limits page.
Santo Domingo Oeste and San Cristóbal lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.