March weather forecast
Ascension Island, Saint Helena, Ascension and Tristan da Cunha

The tropical allure of Ascension Island can be felt vividly in March. The Island experiences a slight escalation in temperature, and humidity concurrently reduces to 69%. Sun worshippers who wish to tan and laze on the beach will be captivated. Consistent sun rays, scanty rainfall, and warm sea temperatures make water activities irresistible. Holding onto these weather patterns, the transition from March into April does not divert much.

Temperature

During February through May, Ascension Island experiences its highest average temperatures, peaking at 31°C (87.8°F).

Heat index

In March, the heat index is calculated to be a sweltering 37°C (98.6°F). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

In March, the average relative humidity in Ascension Island is 69%.

Rainfall

In Ascension Island, Saint Helena, Ascension and Tristan da Cunha, in March, it is raining for 3 days, with typically 18mm (0.71") of accumulated precipitation. In Ascension Island, during the entire year, the rain falls for 30 days and collects up to 142mm (5.59") of precipitation.

Sea temperature

March through May, with an average sea temperature of 28°C (82.4°F), are months with the warmest seawater in Ascension Island.
Note: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

In March, the average length of the day in Ascension Island is 12h and 9min.
On the first day of March, sunrise is at 07:02 and sunset at 19:17. On the last day of the month, sunrise is at 07:00 and sunset at 19:02 GMT.

Sunshine

The months with the most sunshine in Ascension Island are March and April, with an average of 8.9h of sunshine.

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 12 in March translates into the following instructions:
Carry out all important precautions, unprotected skin could get burns in no time. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Sunscreen of at least SPF 30 should be applied generously and reapplied often on overcast days, especially post swim or outdoor exercise. Alert! UV radiation becomes sharper due to reflections from sand and water.