Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
With the arrival of May, the average high-temperature transitions from a cool 54.5°F (12.5°C) in April to a refreshing 65.5°F (18.6°C). Throughout the nights in May, an average low-temperature of 48.7°F (9.3°C) is noted.Humidity
The average relative humidity in May in Merrimac is 74%.Rainfall
In Merrimac, during May, the rain falls for 7.8 days and regularly aggregates up to 0.39" (10mm) of precipitation. In Merrimac, during the entire year, the rain falls for 78.3 days and collects up to 5.43" (138mm) of precipitation.Snowfall
Months with snowfall in Merrimac, Massachusetts, are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Merrimac aggregates 0.04" (1mm) of snow. In Merrimac, during the entire year, snow falls for 17.2 days and aggregates up to 2.6" (66mm) of snow.Daylight
In Merrimac, Massachusetts, the average length of the day in May is 14h and 40min.On the first day of May in Merrimac, Massachusetts, sunrise is at 5:36 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:08 am and sunset at 8:15 pm EDT.
Sunshine
In Merrimac, the average sunshine in May is 8.5h.UV index
In May, the average daily maximum UV index in Merrimac is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: A maximum high UV index of 5 in May translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Frequently asked questions
What is the usual temperature for Merrimac in May?
What is the average humidity in May in Merrimac?
How many days does it rain in May in Merrimac?
What is the last month it snows in Merrimac?
What is the average length of the day in May in Merrimac?
What time are sunrise and sunset in May in Merrimac?
How many hours of sunshine does Merrimac have in May?
What is the UV index reading in May in Merrimac?
Average temperature in May
Merrimac, MA
- Average high temperature in May: 65.5°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in May: 48.7°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in May
Merrimac, MA
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Merrimac, MA
- Average wind speed in May: 6.9mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in May
Merrimac, MA
- Average humidity in May: 74%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).
Average rainfall in May
Merrimac, MA
- Average rainfall in May: 0.39"
The wettest month (with the highest rainfall) is November (0.67").
The driest month (with the least rainfall) is September (0.2").
Average rainfall days in May
Merrimac, MA
- Average rainfall days in May: 7.8 days
The month with the highest number of rainy days is July (8.8 days).
The month with the least rainy days is January (3.6 days).
Average snowfall in May
Merrimac, MA
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (0.71").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Merrimac, MA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Merrimac, MA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in May
Merrimac, MA
- Average sunshine days in May: 20.3 days
The month with the most sunshine days is January (24.5 days).
The month with the least sunshine days is April (18.4 days).
Average UV index in May
Merrimac, MA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in May
Merrimac, MA
- Average cloud cover in May: 46
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in May
Merrimac, MA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Merrimac, Massachusetts, USA
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