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
As May arrives, Merrimack's weather shows an increase in high-temperatures, moving from April's cool 55°F (12.8°C) to a comfortable 66.9°F (19.4°C). Merrimack, during the nights of May, experiences an average temperature drop to a chilly 47.1°F (8.4°C).Humidity
In Merrimack, the average relative humidity in May is 74%.Rainfall
In Merrimack, during May, the rain falls for 12 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Merrimack, during the entire year, the rain falls for 104.4 days and collects up to 12.95" (329mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Merrimack aggregates 0.04" (1mm) of snow. Throughout the year, in Merrimack, there are 26.1 snowfall days, and 11.54" (293mm) of snow is accumulated.Daylight
In Merrimack, New Hampshire, the average length of the day in May is 14h and 40min.On the first day of the month, sunrise is at 5:38 am and sunset at 7:47 pm. On the last day of May, sunrise is at 5:10 am and sunset at 8:17 pm EDT.
Sunshine
In May, the average sunshine is 8.4h.UV index
In May, the average daily maximum UV index in Merrimack is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In May, an average UV index of 5 transforms into the following instructions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Merrimack in May?
What is the average humidity in May in Merrimack?
How much does it rain in Merrimack in May?
What is the last month it snows in Merrimack?
What is the average length of the day in May in Merrimack?
What time are sunrise and sunset in May in Merrimack?
How many hours of sunshine does Merrimack have in May?
How high is the UV index in May in Merrimack?
Average temperature in May
Merrimack, NH
- Average high temperature in May: 66.9°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in May: 47.1°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in May
Merrimack, NH
- Average pressure in May: 30"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Merrimack, NH
- Average wind speed in May: 6.3mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in May
Merrimack, NH
- Average humidity in May: 74%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in May
Merrimack, NH
- Average rainfall in May: 0.98"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in May
Merrimack, NH
- Average rainfall days in May: 12 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in May
Merrimack, NH
- Average snowfall in May: 0.04"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Merrimack, NH
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Merrimack, NH
- 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 2min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in May
Merrimack, NH
- Average sunshine days in May: 17.1 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in May
Merrimack, NH
- 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
Merrimack, NH
- Average cloud cover in May: 47
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in May
Merrimack, NH
- Average visibility in May: 5mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
Merrimack, New Hampshire, USA
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