March weather forecast
Merizo, GU

March brings about a subtle shift from the relatively cooler months of January and February. It is characterized by a humid climate, albeit offering a practical balance between rainfall and sunshine. The sea temperature gently rises to 82.6°F (28.1°C), enriching the possibilities for waterside recreation. The wind speed starts to drop slightly, paving the way for calmer days. As the month progresses, there is a notable increase in daylight hours indicating the approach of the summer season.

Temperature

Merizo marks the onset of March with an average high-temperature of a still warm 82°F (27.8°C), a subtle shift from February's 81.7°F (27.6°C). March records a small disparity from daytime temperatures, marking an average low-temperature of 80.1°F (26.7°C) in Merizo, Guam.

Heat index

In March, the average heat index is evaluated at a tropical 87.8°F (31°C). Persisting in activity during exposure could lead to weariness and subsequently to heat cramps.
When referencing the heat index, its values are suitable for shady environments and light breezes. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', marries air temperature and humidity to produce a value illustrating perceived warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

The months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%.

Rainfall

The month with the least rainfall is March, when the rain falls for 20.2 days and typically collects 1.81" (46mm) of precipitation.

Ocean temperature

In Merizo, the average seawater temperature in March is 82.6°F (28.1°C).
Note: A water temperature from 77°F (25°C) to 84.2°F (29°C) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

In March, the average length of the day is 12h and 4min.
On the first day of the month, sunrise is at 6:37 am and sunset at 6:30 pm. On the last day of March, sunrise is at 6:17 am and sunset at 6:32 pm ChST.

Sunshine

The average sunshine in March is 8.1h.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 7 during March translates into the following directions:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Watch out! Sand and water enhance the UV exposure you receive.