September weather forecast and climate
Chetumal, Mexico

September, the first month of the autumn, in Chetumal, is still a hot month, with temperature in the range of an average low of 24°C (75.2°F) and an average high of 32.5°C (90.5°F).

Temperature

In September, the average high-temperature is 32.5°C (90.5°F), and the average low-temperature is 24°C (75.2°F).

Humidity

In Chetumal, the average relative humidity in September is 79%.

Rainfall

September is the month with the most rainfall in Chetumal, Mexico. Rain falls for 15.8 days and accumulates 206.8mm (8.1") of precipitation.

Sea temperature

September is the month with the warmest seawater in Chetumal, with an average sea temperature of 29.7°C (85.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Chetumal, the average length of the day is 12.2h.

Sunshine

In September, the average sunshine in Chetumal is 6.8h.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Chetumal. A UV Index reading of 11, and higher, represents an extreme threat to health from unsafe exposure to the UV radiation for ordinary individuals.
The daily maximum UV index of 12 interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in September in Chetumal?

In Chetumal, Mexico, in September, the average high-temperature is 32.5°C (90.5°F), and the average low-temperature is 24°C (75.2°F).

What is the average humidity in September in Chetumal?

The average relative humidity in September in Chetumal is 79%.

How many days does it rain in September in Chetumal?

In September, in Chetumal, Mexico, the rain falls for 15.8 days. Throughout September, 206.8mm (8.1") of precipitation is accumulated.

What is the rainiest month in Chetumal?

The month with the most rainfall in Chetumal is September when the rain falls for 15.8 days and typically aggregates up to 206.8mm (8.1") of precipitation.

What is the month with the warmest sea water in Chetumal?

September is the month with the warmest seawater in Chetumal, with an average sea temperature of 29.7°C (85.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the sea water temperature in September in Chetumal?

In Chetumal, Mexico, the average seawater temperature in September is 29.7°C (85.5°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Chetumal have in September?

In September, the average length of the day in Chetumal, Mexico, is 12.2h.

How many hours of sunshine does Chetumal have in September?

The average sunshine in September in Chetumal, Mexico, is 6.8h.

What are the months with the highest UV index in Chetumal?

Months with the highest UV index are March through September, with an average maximum UV index of 12.

What is the UV index intensity in September in Chetumal?

The average daily maximum UV index in September in Chetumal, Mexico, is 12. A UV Index of 11, and more, symbolizes an extreme health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Chetumal, Mexico
  • Average high temperature in September: 32.5°C

The warmest month (with the highest average high temperature) is August (32.8°C).
The month with the lowest average high temperature is January (28.5°C).

  • Average low temperature in September: 24°C

The month with the highest average low temperature is June (25°C).
The coldest month (with the lowest average low temperature) is January (18.3°C).

Average humidity in September - Chetumal, Mexico
  • Average humidity in September: 79%

Months with the highest relative humidity are January, October, November and December (80%).
The month with the lowest relative humidity is April (73%).

Average rainfall in September - Chetumal, Mexico
  • Average rainfall in September: 206.8mm

The wettest month (with the highest rainfall) is September (206.8mm).
The driest month (with the lowest rainfall) is March (26.4mm).

Average rainfall days in September - Chetumal, Mexico
  • Average rainfall days in September: 15.8 days

The month with the highest number of rainy days is September (15.8 days).
Months with the lowest number of rainy days are March and April (3.8 days).

Average sea temperature in September - Chetumal, Mexico
  • Average sea temperature in September: 29.7°C

The best month for swimming (with the highest average sea temperature) is September (29.7°C).
The coldest month (with the lowest average sea temperature) is January (26.2°C).

Average daylight in September / Average sunshine in September - Chetumal, Mexico
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in September: 6.8h

The month with most sunshine is April (Average sunshine: 9.1h).
The month with least sunshine is December (Average sunshine: 6.6h).

Average UV index in September - Chetumal, Mexico
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
Months with the lowest UV index are January, November and December (UV index 8).

deutscheenglishespañolрусский中文