Gentle whispers of warm air hover over
Ascension Island marking the start of a new year. Compared to
December,
January weather sees a negligible increase in temperature from 28°C (82.4°F) to 30°C (86°F) as the highest value recorded for the day. Expect cooler evenings with an inviting sea breeze that’s perfect for strolling under the starlit sky. The sun shines generously during this period and occasional light rain showers happen to quench the thirst of the ground. As
February approaches, ocean temperatures rise steadily, setting the stage for wonderful coastal activities.
Temperature
The onset of January manifests an average high-temperature of a tropical 30°C (86°F), demonstrating a minor variation from the preceding month. Ascension Island, during the month of January, experiences an average low-temperature of 23°C (73.4°F).
Heat index
In January, the heat index is calculated to be a fiery hot 35°C (95°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Be advised, the heat index considers values for conditions in shade and with a light breeze. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. 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 particularly relevant to babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.
Humidity
The most humid month in Ascension Island is January, with an average relative humidity of 70%.
Rainfall
The months with the least rainfall are January,
November and December Rain falls for 2 days and accumulates 4mm (0.16") of rain.
Sea temperature
In Ascension Island, the average seawater temperature in January is 26°C (78.8°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.
Daylight
In Ascension Island, the average length of the day in January is 12h and 31min.
On the first day of the month, sunrise is at 06:43 and sunset at 19:18. On the last day of January, in Ascension Island, sunrise is at 06:57 and sunset at 19:24 GMT.
Sunshine
The average sunshine in January is 7.4h.
UV index
January through
April,
September through December, with an average maximum UV index of 12, are months with the highest UV index in Ascension Island. A UV Index of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 12 suggests this advice:
Ensure all key precautions. Defense against sun exposure is critical. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Even on overcast days, ensure the application and frequent reapplication of sunscreen with at least an SPF 30, especially post swim or outdoor exercise. Be alert! The reflection of water and sand augments UV radiation intensity.