September could be a good time to visit Port-au-Prince, as the weather is generally fine. The average high temperature is around +90°F, and there are typically 0 sunny days in September. However, expect about 27 rainy days, and total monthly rainfall of approximately 210 mm. The weather is changeable so pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+90°F
Avg. max. temperature
+73°F
Min.
+97°F
Max.
210 mm
Total precipitation
81%
Avg. humidity
1 m/s
Avg. wind
0 ☀️
Sunny Days
1 ⛅️
Cloudy
27 🌦
Rainy
Our opinion: Port-au-Prince has OK weather in September.
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Average temperature in Port-au-Prince in September
Here are the expected maximum, average and minimum temperatures in Port-au-Prince for September based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in September is +91°F with a maximum of +95°F and a minimum of +79°F.
The average maximum temperature goes down 22% by the end of the month, compared with the beginning of the month, from +95°F to +91°F.
Is Port-au-Prince warm or cold in September?
Port-au-Prince is typically hot in September.
Maximum temperatures go down compared to the previous month from +91°F to +90°F. The minimum temperature also goes up from +79°F to +79°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
September is one of the warmest months in Port-au-Prince, here is the comparison with other months:
Climate in Port-au-Prince in September
Port-au-Prince weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+91°F
+90°F
+88°F
Min. temperature
+75°F
+73°F
+72°F
Max. temperature
+97°F
+97°F
+95°F
Rainfall
185 mm
210 mm
206 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
77%
81%
82%
Air pressure
1015 HPa
1014 HPa
1013 HPa
Sunny days
1
0
0
Cloudy days
3
1
1
Rainy days
27
27
29
Snowy days
0
0
0
September weather is still as ok as in August.It’s getting colder in September. From +91°F in the day, the average maximum temperature lowers to +90°F.Prepare for more rain. Average rainfall goes from 185 mm to 210 mm.Humidity rises from 77% to 81%.The average wind speed doesn’t change much during September, staying around 1 m/s.The days becoming less sunny, going from 1 sunny days in August to 0 in September.
October brings much the same weather, it remains ok.
Wind speed in Port-au-Prince in September based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Port-au-Prince is gradually decreasing during September, going from 5 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Port-au-Prince based on historical data.
Last Year
Historical Data
Total precipitation in September is about 182 mm, with a 83% chance of rain on a typical day. The maximum amount of rainfall per day is around 38 mm, which is moderate rain.September is a pretty wet month with over 25 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
September is one of the rainiest months in Port-au-Prince, here is a comparison with other months, total mm:
Port-au-Prince wettest month is May, where a typical day has a 94% chance of precipitation and 235 mm of rainfall per day. January, on the other hand, is the driest month with a mere 55% chance of precipitation and 24 mm of rainfall per day.
How was the weather last September in Port-au-Prince?
This is the weather in Port-au-Prince in September 2025:
1 September
☀️
+95°F
2 September
🌧️
+92°F
3 September
☁️
+93°F
4 September
☁️
+91°F
5 September
☁️
+93°F
6 September
☀️
+91°F
7 September
☁️
+94°F
8 September
☀️
+92°F
9 September
☀️
+90°F
10 September
☁️
+93°F
11 September
☀️
+92°F
12 September
☀️
+92°F
13 September
☁️
+93°F
14 September
☁️
+91°F
15 September
☁️
+94°F
16 September
🌧️
+91°F
17 September
🌧️
+91°F
18 September
☁️
+92°F
19 September
☁️
+92°F
20 September
🌧️
+92°F
21 September
🌧️
+90°F
22 September
☁️
+92°F
23 September
☁️
+91°F
24 September
☁️
+92°F
25 September
☁️
+94°F
26 September
☁️
+93°F
27 September
🌧️
+92°F
28 September
🌧️
+91°F
29 September
☁️
+91°F
30 September
☁️
+92°F
In September 2025 Port-au-Prince had 6 sunny days, 17 cloudy days, and 7 rainy days. The average maximum temperature was +91°F, with an absolute maximum of +95°F and a minimum of +90°F. The average humidity was 74%, with a maximum of 100% and a minimum of 36%. The average wind speed was 3 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change Over the Years
This is how Port-au-Prince climate has changed over the last 43 years.
The climate in Port-au-Prince in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1979 (+86°F) and the highest in 2023 (+91°F). The driest year was 1997 with only 1184 mm of rainfall, and the wettest year was 1979 with 2130 mm.
FAQ
Frequently asked questions about the weather in Port-au-Prince in September:
Is September a good time to visit Port-au-Prince?
It’s always a good time to visit Port-au-Prince, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Port-au-Prince in September?
Absolutely, September is hot in Port-au-Prince. Plan on beach and pool time, and ensure that you pack light and breathable options to stay comfortable.
Is Port-au-Prince rainy in September?
Port-au-Prince is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Port-au-Prince in September?
Usually, it’s not very sunny in Port-au-Prince in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Port-au-Prince, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
