May weather forecast
Nashua, NH

The arched Main Street Bridge crossing over the iconic Nashua River in New Hampshire
The arched Main Street Bridge crossing over the iconic Nashua River in New Hampshire

Weather in May

May, the last month of the spring, in Nashua, is a comfortable month, with average temperature ranging between max 67.3°F (19.6°C) and min 47.5°F (8.6°C).

Temperature

In May, the average high-temperature rises, from a cool 55.2°F (12.9°C) in April, to an enjoyable 67.3°F (19.6°C). The average low-temperature, in May, is 47.5°F (8.6°C).

Humidity

The average relative humidity in Nashua is 73%.

Rainfall

In Nashua, during 9.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Nashua, New Hampshire, during the entire year, the rain falls for 91.2 days and collects up to 7.24" (184mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, Nashua aggregates 0.04" (1mm) of snow. Throughout the year, in Nashua, there are 25 snowfall days, and 5.91" (150mm) of snow is accumulated.

Daylight

In May, the average length of the day in Nashua is 14.7h.

Sunshine

The average sunshine in May is 8.5h.

UV index

The average daily maximum UV index in Nashua, New Hampshire, is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Nashua?

In May, the average relative humidity is 73%.

How much does it rain in Nashua in May?

In Nashua, in May, during 9.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated.

What is the last month it snows in Nashua?

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

What is the average length of the day in May in Nashua?

In Nashua, the average length of the day in May is 14.7h.

How many hours of sunshine does Nashua have in May?

The average sunshine in May in Nashua, New Hampshire, is 8.5h.

How high is the UV index in May in Nashua?

In Nashua, New Hampshire, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from unsafe exposure to the Sun's UV rays.

Average temperature in May
Nashua, NH

Average temperature in May - Nashua, NH
  • Average high temperature in May: 19.6°C

The warmest month (with the highest average high temperature) is July (27.8°C).
The month with the lowest average high temperature is January (-0.6°C).

  • Average low temperature in May: 8.6°C

The month with the highest average low temperature is July (16.4°C).
The coldest month (with the lowest average low temperature) is January (-7.8°C).

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Average pressure in May
Nashua, NH

Average pressure in May - Nashua, NH
  • Average pressure in May: 1015.9mbar

The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013.2mbar).

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Average wind speed in May
Nashua, NH

Average wind speed in May - Nashua, NH
  • Average wind speed in May: 10.1km/h

The windiest month (with the highest average wind speed) is January (13.1km/h).
The calmest month (with the lowest average wind speed) is August (8.2km/h).

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Average humidity in May
Nashua, NH

Average humidity in May - Nashua, NH
  • Average humidity in May: 73%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in May
Nashua, NH

Average rainfall in May - Nashua, NH
  • Average rainfall in May: 16mm

The wettest month (with the highest rainfall) is November (20mm).
The driest month (with the least rainfall) is September (7mm).

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Average rainfall days in May
Nashua, NH

Average rainfall days in May - Nashua, NH
  • Average rainfall days in May: 9.4 days

The month with the highest number of rainy days is June (10.4 days).
The month with the least rainy days is January (3.5 days).

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Average snowfall in May
Nashua, NH

Average snowfall in May - Nashua, NH
  • Average snowfall in May: 1mm

The months with the highest snowfall are February and December (32mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in May
Nashua, NH

Average snowfall days in May - Nashua, NH
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Nashua, NH

Average daylight in May / Average sunshine in May - Nashua, NH
  • Average daylight in May: 14.7h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in May: 8.5h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in May
Nashua, NH

Average sunshine days in May - Nashua, NH
  • Average sunshine days in May: 18.5 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (17.3 days).

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Average UV index in May
Nashua, NH

Average UV index in May - Nashua, 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, November and December (UV index 2).

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Average cloud cover in May
Nashua, NH

Average cloud cover in May - Nashua, NH
  • Average cloud cover in May: 47

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in May
Nashua, NH

Average visibility in May - Nashua, NH
  • Average visibility in May: 8km

The months with the highest visibility are January, March, April, November and December (9km).
The months with the lowest visibility are February, May, June, July, August, September and October (8km).

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