May weather forecast and climate
Somerville, NJ

The last month of the spring, May, is an agreeable month in Somerville, New Jersey, with temperature in the range of an average high of 70.2°F (21.2°C) and an average low of 52.2°F (11.2°C).

Temperature

In Somerville, New Jersey, the average high-temperature in May rises, from a moderate 59.5°F (15.3°C) in April, to a pleasant 70.2°F (21.2°C). In May, the average low-temperature is 52.2°F (11.2°C).

Humidity

In May, the average relative humidity is 78%.

Rainfall

In Somerville, it is raining for 17 days, with typically 2.72" (69mm) of accumulated precipitation. In Somerville, during the entire year, the rain falls for 157.9 days and collects up to 28.19" (716mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Somerville. May is the last month it regularly snows. During 0.1 snowfall days, Somerville aggregates 0.24" (6mm) of snow. Throughout the year, in Somerville, there are 23.8 snowfall days, and 9.53" (242mm) of snow is accumulated.

Daylight

In May, the average length of the day in Somerville is 14.5h.

Sunshine

In May, the average sunshine in Somerville is 8.5h.

UV index

In Somerville, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for the average person.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Somerville?

In Somerville, New Jersey, in May, the average high-temperature is 70.2°F (21.2°C), and the average low-temperature is 52.2°F (11.2°C).

What is the average humidity in May in Somerville?

In May, the average relative humidity is 78%.

How many days does it rain in May in Somerville?

In Somerville, in May, during 17 rainfall days, 2.72" (69mm) of precipitation is typically accumulated.

What is the last month it snows in Somerville?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Somerville aggregates 0.24" (6mm) of snow.

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

The average length of the day in May in Somerville, New Jersey, is 14.5h.

How many hours of sunshine does Somerville have in May?

In Somerville, New Jersey, the average sunshine in May is 8.5h.

What is the UV index reading in May in Somerville?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in May - Somerville, NJ
  • Average high temperature in May: 21.2°C

The warmest month (with the highest average high temperature) is July (29°C).
The month with the lowest average high temperature is January (2°C).

  • Average low temperature in May: 11.2°C

The month with the highest average low temperature is July (18.9°C).
The coldest month (with the lowest average low temperature) is January (-4.9°C).

Average pressure in May - Somerville, NJ
  • Average pressure in May: 1016.3mbar

The month with the highest atmospheric pressure is November (1019.7mbar).
The month with the lowest atmospheric pressure is June (1013.7mbar).

Average wind speed in May - Somerville, NJ
  • Average wind speed in May: 10.8km/h

The windiest month (with the highest average wind speed) is March (13.9km/h).
The calmest month (with the lowest average wind speed) is August (8.6km/h).

Average humidity in May - Somerville, NJ
  • Average humidity in May: 78%

Months with the highest relative humidity are February, October and December (79%).
The month with the lowest relative humidity is April (74%).

Average rainfall in May - Somerville, NJ
  • Average rainfall in May: 69mm

The wettest month (with the highest rainfall) is December (74mm).
The driest month (with the least rainfall) is September (39mm).

Average rainfall days in May - Somerville, NJ
  • Average rainfall days in May: 17 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (9 days).

Average snowfall in May - Somerville, NJ
  • Average snowfall in May: 6mm

The month with the highest snowfall is March (72mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in May - Somerville, NJ
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (6.8 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Somerville, NJ
  • Average daylight in May: 14.5h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in May: 8.5h

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

Average sunshine days in May - Somerville, NJ
  • Average sunshine days in May: 12 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is June (11.7 days).

Average UV index in May - Somerville, NJ
  • Average UV index in May: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in May - Somerville, NJ
  • Average cloud cover in May: 47

Months with the most cloud cover are February and December (Cloud cover 49).
Months with the least cloud cover are July and August (Cloud cover 34).

Average visibility in May - Somerville, NJ
  • Average visibility in May: 8km

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