![]() The individual waves out to sea or at the beach can be higher than this number. This is the average height of the waves, 1-2 miles out to sea. 11 Extreme - Avoid being outside during midday hours. 8-10 Very high - Spend time in the shade between 11am and 3pm. 6-7 High - Seek shade during midday hours, cover up and wear sunscreen. 3-5 Moderate - Take care during midday hours and do not spend too much time in the sun unprotected. No risk of UV - It’s safe to stay outside. UV exposure index and the protection required to help keep you safe: The higher the percentage of humidity, the wetter it will feel outside. If there is a lot of water vapour, the humidity will be high. Humidity is the amount of water vapor in the air. Visibility measures the distance at which an object can be clearly seen. Read more about how wind will affect you at the beach. ![]() The number is the average wind speed.īeware of offshore winds if you are using inflatables, paddle boards or kayaks. If the arrow points from land to sea, the wind will be blowing out to sea (‘offshore’). The arrow shows the direction of the wind (up is north). The number represents the average wind speed expected at that time. The letters show the direction the wind is blowing from (on a standard 16-point compass). The arrow shows the direction the wind is blowing. Strong winds are shown in bold for speeds of 29 mph or more. Wind gust shows the highest wind speed that you should encounter at that time, as winds peak and lull. This gives you a better idea of how the temperature will actually feel at the time. You can see the temperature in Celsius or Fahrenheit by using the dropdown menu.įeels like temperature considers other factors, such as wind speed and humidity. This number shows the air temperature for the time period. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.Chance of precipitation represents how likely it is that rain (or other types of precipitation, such as sleet, snow, hail and drizzle) will fall from the sky at a certain time. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Take precautions - Protection against sun damage is advised. Note: The daily maximum UV index of 5 in May interpret into the following advice: A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals. UV indexThe average daily maximum UV index in May in Boston, Massachusetts, is 5. SunshineThe average sunshine in May in Boston, Massachusetts, is 8.3h. On the last day of the month, sunrise is at 5:10 am and sunset at 8:13 pm EDT. On the first day of May in Boston, sunrise is at 5:39 am and sunset at 7:43 pm. Daylight In May, the average length of the day in Boston, Massachusetts, is 14h and 37min. Unprotected immersion in temperatures below 50☏ (10☌) causes quickly maximum intensity cold shock with hyperventilation. Note: Swimming in 49.1☏ (9.5☌) is considered dangerous. ![]() Ocean temperatureIn May, the average ocean temperature in Boston, Massachusetts, is 49.1☏ (9.5☌). In Boston, Massachusetts, during the entire year, snow falls for 29.8 days and aggregates up to 15.75" (400mm) of snow. During 0.1 snowfall days, Boston aggregates 0.04" (1mm) of snow. May is the last month it regularly snows in Boston. SnowfallMonths with snowfall are January through May, October through December. Throughout the year, there are 141.4 rainfall days, and 27.2" (691mm) of precipitation is accumulated. Rainfall In Boston, during May, the rain falls for 15.3 days and regularly aggregates up to 1.81" (46mm) of precipitation. HumidityIn Boston, the average relative humidity in May is 72%. In Boston, in May, the average low-temperature is 50☏ (10☌). TemperatureIn Boston, the average high-temperature in May increases from a cool 55.2☏ (12.9☌) in April to an enjoyable 66.4☏ (19.1☌). May, the last month of the spring in Boston, is an enjoyable month, with an average temperature ranging between min 50☏ (10☌) and max 66.4☏ (19.1☌).
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