May weather forecast and climate
Greendell, NJ

May, the last month of the spring, in Greendell, is an agreeable month, with temperature in the range of an average high of 68.5°F (20.3°C) and an average low of 48.9°F (9.4°C).

Temperature

In Greendell, the average high-temperature rises, from a mild 57.4°F (14.1°C) in April, to an agreeable 68.5°F (20.3°C). In May, in Greendell, the average low-temperature is 48.9°F (9.4°C).

Humidity

In May, the average relative humidity is 79%.

Rainfall

In Greendell, during May, the rain falls for 17.3 days and regularly aggregates up to 2.87" (73mm) of precipitation. Throughout the year, in Greendell, there are 161.1 rainfall days, and 28.98" (736mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Greendell. May is the last month it regularly snows. During 0.3 snowfall days, Greendell aggregates 0.51" (13mm) of snow. In Greendell, during the entire year, snow falls for 36.8 days, and aggregates up to 17.52" (445mm) of snow.

Daylight

In Greendell, the average length of the day is 14.5h.

Sunshine

In May, the average sunshine in Greendell is 8.1h.

UV index

In Greendell, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in May in Greendell?

The average high-temperature, in May, in Greendell, New Jersey, is 68.5°F (20.3°C), while the average low-temperature is 48.9°F (9.4°C).

What is the average humidity in May in Greendell?

In Greendell, New Jersey, the average relative humidity in May is 79%.

How much does it rain in Greendell in May?

In Greendell, during May, the rain falls for 17.3 days and regularly aggregates up to 2.87" (73mm) of precipitation.

What is the last month it snows in Greendell?

May is the last month it regularly snows. During 0.3 snowfall days, in May, Greendell aggregates 0.51" (13mm) of snow.

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

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

How many hours of sunshine does Greendell have in May?

In Greendell, New Jersey, the average sunshine in May is 8.1h.

How high is the UV index in May in Greendell?

In May, the average daily maximum UV index in Greendell, New Jersey, is 5. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in May - Greendell, NJ
  • Average high temperature in May: 20.3°C

The warmest month (with the highest average high temperature) is July (28.2°C).
The month with the lowest average high temperature is January (0.7°C).

  • Average low temperature in May: 9.4°C

The month with the highest average low temperature is July (16.6°C).
The coldest month (with the lowest average low temperature) is January (-6.5°C).

Average pressure in May - Greendell, 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 - Greendell, NJ
  • Average wind speed in May: 9.9km/h

The windiest month (with the highest average wind speed) is March (12.7km/h).
The calmest month (with the lowest average wind speed) is August (7.9km/h).

Average humidity in May - Greendell, NJ
  • Average humidity in May: 79%

Months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).

Average rainfall in May - Greendell, NJ
  • Average rainfall in May: 73mm

The wettest month (with the highest rainfall) is July (77mm).
The driest month (with the least rainfall) is September (39mm).

Average rainfall days in May - Greendell, NJ
  • Average rainfall days in May: 17.3 days

Months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (7.5 days).

Average snowfall in May - Greendell, NJ
  • Average snowfall in May: 13mm

Months with the highest snowfall are January and February (109mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in May - Greendell, NJ
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (10.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in May: 8.1h

The month with the most sunshine is July (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4.3h).

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

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).

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

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in May - Greendell, NJ
  • Average cloud cover in May: 50

The month with the most cloud cover is February (Cloud cover 52).
Months with the least cloud cover are July and August (Cloud cover 37).

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

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