March weather forecast
Arroyo, PR

March is characterized by a slight upward tick in both temperature and rainfall at 1.42" (36mm), as Arroyo transitions into the more humid part of the year. Most days are sunlit, but the city may witness occasional overcast skies. Notably, this month experiences a remarkable increase in daylight hours compared to previous months. Therefore, it provides an extended timeframe for locals and tourists to experience the charms of Arroyo. The steady wind during March also contributes to well-balanced weather conditions.

Temperature

The shift into March reveals an average high-temperature of a still warm 81°F (27.2°C), closely mirroring February's climate. An average temperature of 71.6°F (22°C) is recorded during the nights in March.

Heat index

March's average heat index is evaluated at a tropical 86°F (30°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.

Humidity

The least humid month is March, with an average relative humidity of 77%.

Rainfall

In Arroyo, in March, during 19.3 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, there are 255.3 rainfall days, and 29.41" (747mm) of precipitation is accumulated.

Ocean temperature

February and March, with an average ocean temperature of 79.3°F (26.3°C), are months with the coldest seawater in Arroyo.
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In Arroyo, the average length of the day in March is 12h and 3min.
On the first day of March, sunrise is at 6:42 am and sunset at 6:30 pm. On the last day of the month, sunrise is at 6:18 am and sunset at 6:37 pm AST.

Sunshine

The average sunshine in March in Arroyo is 8.6h.

UV index

The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: In March, the average maximum UV index of 6 translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Take heed! Reflections of sand and water make the Sun's UV rays stronger.