Climate averages 1991–2020
Saint-Marc weather
in September.
A hot, wet month: the 4th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Saint-Marc: daytime highs average 31.2°C and nights cool to about 25.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 97 mm of rain on roughly 21 days, which makes September a wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 16 min on an average September day.
The nearest other city in this atlas is Dessalines (26 km away). In September its highs average 32.6°C, 1.4°C warmer than Saint-Marc, with 158 mm of rain.
Among the 18 cities listed in Haiti, Saint-Marc ranks 10th of 18 for the warmest September highs and 5th of 18 for the driest September (rainfall, lowest first). The mean September high of those 18 cities is 31.0°C; Saint-Marc is 0.1°C warmer than that mean.
From September to October, average highs fall by 0.7°C to 30.4°C, and monthly rainfall falls from 97 mm to 87 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
Saint-Marc climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.5°C22.2°C | 22.2°C | 11 | 2.6 | 11.111 h |
| February | 29.7°C22.3°C | 22.3°C | 11 | 2.8 | 11.512 h |
| March | 29.9°C22.7°C | 22.7°C | 20 | 5.8 | 12.012 h |
| April | 30.3°C23.7°C | 23.7°C | 37 | 11.9 | 12.613 h |
| May | 30.5°C24.7°C | 24.7°C | 73 | 17.1 | 13.013 h |
| June | 31.3°C25.4°C | 25.4°C | 63 | 17.0 | 13.313 h |
| July | 32.0°C25.6°C | 25.6°C | 63 | 16.6 | 13.213 h |
| August | 31.9°C25.8°C | 25.8°C | 84 | 19.2 | 12.813 h |
| September, selected | 31.2°C25.5°C | 25.5°C | 97 | 20.8 | 12.312 h |
| October | 30.4°C25.0°C | 25.0°C | 87 | 18.8 | 11.712 h |
| November | 30.0°C24.0°C | 24.0°C | 45 | 9.5 | 11.211 h |
| December | 29.8°C22.9°C | 22.9°C | 11 | 3.0 | 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
- Dessalines in SeptemberHaiti · 26 kmHigh 32.6°C · Low 24.1°C · 158 mm rain
- Gonaïves in SeptemberHaiti · 37 kmHigh 31.4°C · Low 24.7°C · 85 mm rain
- Arcahaie in SeptemberHaiti · 43 kmHigh 31.1°C · Low 24.7°C · 43 mm rain
- Saint-Michel de l'Atalaye in SeptemberHaiti · 48 kmHigh 30.2°C · Low 21.6°C · 182 mm rain
- Léogâne in SeptemberHaiti · 67 kmHigh 30.8°C · Low 24.8°C · 121 mm rain
- Cité Soleil in SeptemberHaiti · 70 kmHigh 32.3°C · Low 25.0°C · 223 mm rain
- Carrefour in SeptemberHaiti · 72 kmHigh 30.9°C · Low 24.7°C · 180 mm rain
- Port-au-Prince in SeptemberHaiti · 74 kmHigh 32.1°C · Low 24.5°C · 223 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 Saint-Marc) is explained once on the Saint-Marc year overview and on the Sources, method and limits page.