May weather forecast
Trenton, NJ

A full aerial view of Trenton, New Jersey, with the George Washington statue
A full aerial view of Trenton, New Jersey, with the George Washington statue

Weather in May

The last month of the spring, May, is an agreeable month in Trenton, New Jersey, with an average temperature ranging between max 70.9°F (21.6°C) and min 53.6°F (12°C).

Temperature

In Trenton, the average high-temperature in May rises from a mild 60.6°F (15.9°C) in April to a pleasant 70.9°F (21.6°C). In Trenton, the average low-temperature is 53.6°F (12°C).

Humidity

In May, the average relative humidity in Trenton is 77%.

Rainfall

In Trenton, in May, during 17.2 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. Throughout the year, there are 156.8 rainfall days, and 31.81" (808mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Trenton. May is the last month it regularly snows. During 0.1 snowfall days, Trenton aggregates 0.28" (7mm) of snow. In Trenton, during the entire year, snow falls for 16.6 days and aggregates up to 8.86" (225mm) of snow.

Daylight

In May, the average length of the day is 14h and 26min.
On the first day of May, sunrise is at 5:58 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:21 pm EDT.

Sunshine

In Trenton, the average sunshine in May is 8.7h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The average daily UV index of 6 in May transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the average humidity in May in Trenton?

The average relative humidity in May in Trenton, New Jersey, is 77%.

How many days does it rain in May in Trenton?

In Trenton, New Jersey, in May, it is raining for 17.2 days, with typically 2.91" (74mm) of accumulated precipitation.

What is the last month it snows in Trenton?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Trenton aggregates 0.28" (7mm) of snow.

How many hours of daylight does Trenton have in May?

In May, the average day length in Trenton, New Jersey, is 14h and 26min.

When is the sunrise / sunset in May in Trenton?

In May, on the first day of the month, sunrise is at 5:58 am and sunset at 7:54 pm. On the last day of the month, in Trenton, sunrise is at 5:31 am and sunset at 8:21 pm EDT.

How long on average sun shines in May in Trenton?

In May, the average sunshine duration in Trenton is 8.7h.

What is the month with the highest UV index in Trenton?

May through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the UV index reading in May in Trenton?

In Trenton, New Jersey, the average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Trenton, NJ

Average temperature in May - Trenton, NJ
  • Average high temperature in May: 70.9°F

The warmest month (with the highest average high temperature) is July (85.1°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in May: 53.6°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

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Average pressure in May
Trenton, NJ

Average pressure in May - Trenton, NJ
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Trenton, NJ

Average wind speed in May - Trenton, NJ
  • Average wind speed in May: 6.9mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in May
Trenton, NJ

Average humidity in May - Trenton, NJ
  • Average humidity in May: 77%

The months with the highest relative humidity are February and October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in May
Trenton, NJ

Average rainfall in May - Trenton, NJ
  • Average rainfall in May: 2.91"

The wettest month (with the highest rainfall) is July (3.74").
The driest month (with the least rainfall) is January (1.85").

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Average rainfall days in May
Trenton, NJ

Average rainfall days in May - Trenton, NJ
  • Average rainfall days in May: 17.2 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in May
Trenton, NJ

Average snowfall in May - Trenton, NJ
  • Average snowfall in May: 0.28"

The month with the highest snowfall is March (2.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Trenton, NJ

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

The month with the highest number of snowfall days is January (4.8 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
Trenton, NJ

Average daylight in May / Average sunshine in May - Trenton, NJ
  • Average daylight in May: 14h and 26min

The month with the longest days is June (Average daylight: 14h and 59min).
The month with the shortest days is December (Average daylight: 9h and 22min).

  • Average sunshine in May: 8h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in May
Trenton, NJ

Average sunshine days in May - Trenton, NJ
  • Average sunshine days in May: 11.8 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.3 days).

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Average UV index in May
Trenton, NJ

Average UV index in May - Trenton, NJ
  • Average UV index in May: 6

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

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Average cloud cover in May
Trenton, NJ

Average cloud cover in May - Trenton, NJ
  • Average cloud cover in May: 46

The months with the most cloud cover are February, March and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in May
Trenton, NJ

Average visibility in May - Trenton, NJ
  • Average visibility in May: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

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