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

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

August, the last month of the summer, in St Johnston Village, is another hot month, with average temperature varying between 25°C (77°F) and 31°C (87.8°F).

Temperature

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

Rainfall

In August, in St Johnston Village, the rain falls for 16 days. Throughout August, 124mm (4.88") of precipitation is accumulated. In St Johnston Village, during the entire year, the rain falls for 180 days and collects up to 1040mm (40.94") of precipitation.

Sea temperature

In St Johnston Village, in August, the average water temperature is 28°C (82.4°F).
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 August, the average length of the day in St Johnston Village, Antigua and Barbuda, is 12.7h.

Sunshine

Months with the most sunshine in St Johnston Village are January through August, with an average of 8h of sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in St Johnston Village. A UV Index value of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: In August, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin 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 strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the warmest month in St Johnston Village?

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

What is the temperature in August in St Johnston Village?

The average high-temperature, in August, in St Johnston Village, Antigua and Barbuda, is 31°C (87.8°F), while the average low-temperature is 25°C (77°F).

How many days does it rain in August in St Johnston Village?

In August, the rain falls for 16 days. Throughout August, 124mm (4.88") of precipitation is accumulated.

How warm is the water in August in St Johnston Village?

In August, the average sea temperature is 28°C (82.4°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

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

In St Johnston Village, the average length of the day in August is 12.7h.

What are the months with the most sunshine in St Johnston Village?

Months with the most sunshine in St Johnston Village, Antigua and Barbuda, are January through August, with an average of 8h of sunshine.

How long on average sun shines in August in St Johnston Village?

In August, the average sunshine is 8h.

When is 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 August in St Johnston Village?

The average daily maximum UV index in August 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 August - St Johnston Village, Antigua and Barbuda
  • Average high temperature in August: 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 August: 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 August - St Johnston Village, Antigua and Barbuda
  • Average rainfall in August: 124mm

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

Average rainfall days in August - St Johnston Village, Antigua and Barbuda
  • Average rainfall days in August: 16 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 August - St Johnston Village, Antigua and Barbuda
  • Average sea temperature in August: 28°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 August / Average sunshine in August - St Johnston Village, Antigua and Barbuda
  • Average daylight in August: 12.7h

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 August: 8h

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 August - St Johnston Village, Antigua and Barbuda
  • Average UV index in August: 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).