September weather forecast
Ambergris Caye, Belize

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A perfect location on the beautiful island of Ambergris Caye in Belize
A perfect location on the beautiful island of Ambergris Caye in Belize

Weather in September

September remains within the confines of the rainy season, bolstering the rainfall with a significant amount of 233mm (9.17"), the city's highest throughout the year. While Belize prepares to cherish independence celebrations, the increased rainfall adds a distinct aspect to the festivities. The outdoor decorations and festive parades, in combination with unexpected rain showers, offer an enchanting cultural experience. Remarkably, the enhanced rainfall does not impact the daylight hours, ensuring the vibrance of Ambergris Caye shines through. The uniqueness of celebrating national events amidst the rich ecosystem is a singular offering by the town.

Temperature

Ambergris Caye experiences its warmest period in April through September, averaging a high-temperature of 31°C (87.8°F).

Rainfall

In Ambergris Caye, during September, the rain falls for 16 days and regularly aggregates up to 233mm (9.17") of precipitation. In Ambergris Caye, during the entire year, the rain falls for 136 days and collects up to 1731mm (68.15") of precipitation.

Daylight

In September, the average length of the day is 12h and 14min.
On the first day of September, sunrise is at 05:37 and sunset at 18:05. On the last day of the month, sunrise is at 05:42 and sunset at 17:40 CST.

Sunshine

January, September through December, with an average of 6h of sunshine, are months with the least sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Ambergris Caye. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the maximum UV index of 12 suggests this advice:
Take all critical precautions, unprotected skin might burn swiftly. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Even when the sky is cloudy, apply generously and frequently reapply a sunscreen with SPF 30 or more, especially post every swim or outdoor exercise.

Frequently asked questions

What month is the hottest?

During April through September, Ambergris Caye experiences its peak temperatures, averaging a high-temperature of 31°C (87.8°F).

Is it hot during September?

The high-temperature during September is 31°C (87.8°F) and the low-temperature is 23°C (73.4°F).

How many days does it rain in September?

In September, the rain falls for 16 days. Throughout September, 233mm (9.17") of precipitation is accumulated.

What is the average length of the day in September?

In September, the average day length is 12h and 14min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 05:37 and sunset at 18:05. On the last day of the month, sunrise is at 05:42 and sunset at 17:40 CST.

What are the months with the least sunshine?

January, September through December, with an average of 6h of sunshine, are months with the least sunshine.

How many hours of sunshine does Ambergris Caye have in September?

The average sunshine duration in September is 6h.

What are the months with the highest UV index?

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

What is the UV index intensity in September?

In Ambergris Caye, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from unprotected exposure to UV radiation.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Ambergris Caye, Belize

Average temperature in September - Ambergris Caye, Belize
  • Average high temperature in September: 31°C

The warmest months (with the highest average high temperature) are April, May, June, July, August and September (31°C).
The month with the lowest average high temperature is December (27°C).

  • Average low temperature in September: 23°C

The month with the highest average low temperature is June (24°C).
The coldest months (with the lowest average low temperature) are January and December (19°C).

Average rainfall in September
Ambergris Caye, Belize

Average rainfall in September - Ambergris Caye, Belize
  • Average rainfall in September: 233mm

The wettest month (with the highest rainfall) is October (245mm).
The driest month (with the least rainfall) is March (37mm).

Average rainfall days in September
Ambergris Caye, Belize

Average rainfall days in September - Ambergris Caye, Belize
  • Average rainfall days in September: 16 days

The months with the highest number of rainy days are July, September and October (16 days).
The month with the least rainy days is April (4 days).

Average daylight in September /
Average sunshine in September
Ambergris Caye, Belize

Average daylight in September / Average sunshine in September - Ambergris Caye, Belize
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in September: 6h

The months with the most sunshine are March, April and May (Average sunshine: 8h).
The months with the least sunshine are January, September, October, November and December (Average sunshine: 6h).

Average UV index in September
Ambergris Caye, Belize

Average UV index in September - Ambergris Caye, Belize
  • Average UV index in September: 12

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

Ambergris Caye, Belize

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