May weather forecast
Manchester, NH

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The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below
The colorful buildings in the city of Manchester, New Hampshire, right next to scenic trees on the seashore, a beautiful glass image in the river below

Weather in May

May tempers the refreshing spring into something resembling the beginnings of a muted summer. Despite warming trends, it isn't a dry month; with remnants of April showers in the form of 0.98" (25mm) of rain. The city becomes a hub of vibrant life, thanks to the bounty of sunlight illuminating the blue skies. The shift in the weather gives way to outdoor activities, as Manchester moves into the warmer half of the year.

Temperature

May in Manchester shows a rise in the average high-temperature, moving from April's cool 55°F (12.8°C) to a comfortable 66.9°F (19.4°C). During the nights in May, Manchester experiences a consistent average temperature of 47.1°F (8.4°C).

Humidity

In May, the average relative humidity is 74%.

Rainfall

In Manchester, in May, it is raining for 12 days, with typically 0.98" (25mm) of accumulated precipitation. Throughout the year, there are 104.4 rainfall days, and 12.95" (329mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Manchester aggregates 0.04" (1mm) of snow. In Manchester, during the entire year, snow falls for 26.1 days and aggregates up to 11.54" (293mm) of snow.

Daylight

The average length of the day in May is 14h and 40min.
On the first day of May, sunrise is at 5:38 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:17 pm EDT.

Sunshine

In Manchester, New Hampshire, the average sunshine in May is 8.4h.

UV index

In Manchester, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 5 in May translates into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Around midday, solar radiation is most harmful; hence, exposure should be limited. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.

Frequently asked questions

What are May temperatures?

The high-temperature during May is 66.9°F (19.4°C) and the low-temperature is 47.1°F (8.4°C).

What is the average humidity in May?

In Manchester, the average relative humidity in May is 74%.

How many days does it rain in May?

In Manchester, during May, the rain falls for 12 days and regularly aggregates up to 0.98" (25mm) of precipitation.

What is the last month it snows in Manchester?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Manchester aggregates 0.04" (1mm) of snow.

What is the average length of the day in May?

The average day length in May is 14h and 40min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 5:38 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 5:09 am and sunset at 8:17 pm EDT.

How long on average sun shines in May?

In Manchester, the average sunshine duration in May is 8.4h.

How high is the UV index in May?

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Manchester, NH

Average temperature in May - Manchester, 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
Manchester, NH

Average pressure in May - Manchester, 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
Manchester, NH

Average wind speed in May - Manchester, 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
Manchester, NH

Average humidity in May - Manchester, 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
Manchester, NH

Average rainfall in May - Manchester, 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
Manchester, NH

Average rainfall days in May - Manchester, 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
Manchester, NH

Average snowfall in May - Manchester, 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
Manchester, NH

Average snowfall days in May - Manchester, 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
Manchester, NH

Average daylight in May / Average sunshine in May - Manchester, 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
Manchester, NH

Average sunshine days in May - Manchester, 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
Manchester, NH

Average UV index in May - Manchester, 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
Manchester, NH

Average cloud cover in May - Manchester, 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
Manchester, NH

Average visibility in May - Manchester, 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).

Manchester, New Hampshire, USA

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