Weathermondo.com
The weather in September in Guinea-Bissau
It's hot in September in Guinea-Bissau with an average temperature of 31°C. Temperatures this month range from a low of 30°C to a high of 33°C. At night, you can expect temperatures between 24°C and 25°C.
Looking for sun? September isn’t a good month to be in Guinea-Bissau. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Guinea-Bissau. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 39°C in 2015, Guinea-Bissau reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 25°C in 2018. The extreme nighttime temperatures ranged from a lowest recorded value of 21°C to a highest value of 27°C.
Rainfall amount
In September, there is an average of 373 mm of precipitation, spread over 29 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for Guinea-Bissau
Click on any day in September to get detailed info about the usual weather on that day in Guinea-Bissau. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Guinea-Bissau | New York | |
|---|---|---|
| Average temperature | 31°C | 27°C |
| Max. temperature | 33°C | 31°C |
| Min. temperature | 24°C | -5°C |
| Total precipitation | 373 mm | 57 mm |
| Rainy days | 29 days | 9 days |
Start of September
The month of September starts in Guinea-Bissau with hot temps, averaging around 31°C during the day and nights around 25°C.
Mid September
By mid-September, daytime temps rise to around 32°C, with nights around 25°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Guinea-Bissau is around 32°C, while nighttime temps are about 25°C. There’s a significant chance of many days with precipitation.
Find affordable vacations to Guinea-Bissau
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Check out the climate of Guinea-Bissau for all months and discover the best travel time
The climate in Guinea-Bissau is based on weather data from Bissau. Other spots might have different weather. You can check out all destinations in Guinea-Bissau to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Guinea-Bissau. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Guinea-Bissau
Temperature in September in Guinea-Bissau over the years
Precipitation charts
These charts show the average amount of precipitation in September in Guinea-Bissau. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Guinea-Bissau
Total precipitation in September in Guinea-Bissau over the years
Daily UV index in September in Guinea-Bissau
This chart shows the average daily UV index in September in Guinea-Bissau, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Guinea-Bissau
Have you been to Guinea-Bissau in September?
Share your weather experience in September in Guinea-Bissau.
Average weather in Guinea-Bissau by month
Click on a month below to see detailed weather info for Guinea-Bissau. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.