St Johnston Village
Antigua and Barbuda
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
St Johnston Village, Antigua and Barbuda

September, the first month of the autumn, in St Johnston Village, is still a hot month, with average temperature ranging between max 31°C (87.8°F) and min 25°C (77°F).

Temperature

July through September, with an average high-temperature of 31°C (87.8°F), are the warmest months.

Rainfall

September is the month with the most rainfall. Rain falls for 17 days and accumulates 140mm (5.51") of precipitation.

Sea temperature

With an average sea temperature of 29°C (84.2°F), September is the month with the warmest seawater.
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

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

Sunshine

September through December, with an average of 7h of sunshine, are months with the least sunshine in St Johnston Village.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an extreme health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What are the warmest months in St Johnston Village?

July through September, with an average high-temperature of 31°C (87.8°F), are warmest months.

What is the temperature in September in St Johnston Village?

In St Johnston Village, in September, the average high-temperature is 31°C (87.8°F), and the average low-temperature is 25°C (77°F).

How much does it rain in St Johnston Village in September?

In St Johnston Village, in September, it is raining for 17 days, with typically 140mm (5.51") of accumulated precipitation.

What is the wettest month in St Johnston Village?

The month with the most rainfall in St Johnston Village, Antigua and Barbuda, is September when the rain falls for 17 days and typically aggregates up to 140mm (5.51") of precipitation.

When is the sea warmest in St Johnston Village?

September is the month with the warmest seawater, with an average sea temperature of 29°C (84.2°F).

What is the sea water temperature in September in St Johnston Village?

In September, the average sea temperature in St Johnston Village, Antigua and Barbuda, is 29°C (84.2°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in St Johnston Village?

In September, the average length of the day in St Johnston Village, Antigua and Barbuda, is 12.2h.

What is the month with the least sunshine in St Johnston Village?

Months with the least sunshine are September through December, with an average of 7h of sunshine.

How many hours of sunshine does St Johnston Village have in September?

In St Johnston Village, the average sunshine in September is 7h.

What are the months with the highest UV index in St Johnston Village?

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 St Johnston Village?

The average daily maximum UV index in September in St Johnston Village, Antigua and Barbuda, is 12. A UV Index estimate of 11, and higher, represents an ultimate hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - St Johnston Village, Antigua and Barbuda
  • Average high temperature in September: 31°C

Warmest months (with the highest average high temperature) are July, August and September (31°C).
Months with the lowest average high temperature are January and February (28°C).

  • Average low temperature in September: 25°C

Months with the highest average low temperature are June, July, August and September (25°C).
Coldest months (with the lowest average low temperature) are January, February and March (22°C).

Average rainfall in September - St Johnston Village, Antigua and Barbuda
  • Average rainfall in September: 140mm

The wettest month (with the highest rainfall) is September (140mm).
The driest month (with the lowest rainfall) is February (37mm).

Average rainfall days in September - St Johnston Village, Antigua and Barbuda
  • Average rainfall days in September: 17 days

Months with the highest number of rainy days are September, October, November and December (17 days).
The month with the lowest number of rainy days is April (11 days).

Average sea temperature in September - St Johnston Village, Antigua and Barbuda
  • Average sea temperature in September: 29°C

The best month for swimming (with the highest average sea temperature) is September (29°C).
Coldest months (with the lowest average sea temperature) are January, February, March and April (26°C).

Average daylight in September / Average sunshine in September - St Johnston Village, Antigua and Barbuda
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13.1h).
The month with shortest days is December (Average daylight: 11.1h).

  • Average sunshine in September: 7h

Months with most sunshine are January, February, March, April, May, June, July and August (Average sunshine: 8h).
Months with least sunshine are September, October, November and December (Average sunshine: 7).

Average UV index in September - St Johnston Village, Antigua and Barbuda
  • 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 and December (UV index 8).