May weather forecast and climate
Griggstown, NJ

May, the last month of the spring, in Griggstown, is a pleasant month, with average temperature ranging between min 53.2°F (11.8°C) and max 70.5°F (21.4°C).

Temperature

In May, the average high-temperature rises, from a moderate 60.4°F (15.8°C) in April, to a pleasant 70.5°F (21.4°C). The average low-temperature, in May, is 53.2°F (11.8°C).

Humidity

In Griggstown, the average relative humidity in May is 78%.

Rainfall

In Griggstown, in May, during 12.6 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Griggstown, during the entire year, the rain falls for 119.3 days and collects up to 12.72" (323mm) of precipitation.

Snowfall

Months with snowfall in Griggstown are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, Griggstown aggregates 0.2" (5mm) of snow. Throughout the year, there are 16.4 snowfall days, and 4.41" (112mm) of snow is accumulated.

Daylight

The average length of the day in May is 14.4h.

Sunshine

In Griggstown, New Jersey, the average sunshine is 8.6h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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.

What is the temperature in May in Griggstown?

In May, the average high-temperature is 70.5°F (21.4°C), and the average low-temperature is 53.2°F (11.8°C).

What is the average humidity in May in Griggstown?

The average relative humidity in May is 78%.

How much does it rain in Griggstown in May?

In Griggstown, New Jersey, in May, it is raining for 12.6 days, with typically 1.22" (31mm) of accumulated precipitation.

What is the last month it snows in Griggstown?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Griggstown aggregates 0.2" (5mm) of snow.

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

In May, the average length of the day in Griggstown is 14.4h.

How long on average sun shines in May in Griggstown?

In Griggstown, New Jersey, the average sunshine in May is 8.6h.

What is the UV index reading in May in Griggstown?

In Griggstown, the average daily maximum UV index in May 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 - Griggstown, NJ
  • Average high temperature in May: 21.4°C

The warmest month (with the highest average high temperature) is July (29.3°C).
The month with the lowest average high temperature is January (2.7°C).

  • Average low temperature in May: 11.8°C

The month with the highest average low temperature is July (19.4°C).
The coldest month (with the lowest average low temperature) is January (-4.3°C).

Average pressure in May - Griggstown, NJ
  • Average pressure in May: 1016.4mbar

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 - Griggstown, NJ
  • Average wind speed in May: 11.1km/h

The windiest month (with the highest average wind speed) is March (14.1km/h).
The calmest month (with the lowest average wind speed) is August (8.7km/h).

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

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in May - Griggstown, NJ
  • Average rainfall in May: 31mm

The wettest month (with the highest rainfall) is July (43mm).
The driest month (with the least rainfall) is September (17mm).

Average rainfall days in May - Griggstown, NJ
  • Average rainfall days in May: 12.6 days

The month with the highest number of rainy days is July (13.9 days).
The month with the least rainy days is January (6.1 days).

Average snowfall in May - Griggstown, NJ
  • Average snowfall in May: 5mm

The month with the highest snowfall is March (36mm).
Months with the least snowfall are June, July, August, September and October (0mm).

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

The month with the highest number of snowfall days is January (4.6 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Griggstown, NJ
  • Average daylight in May: 14.4h

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: 8.6h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in May - Griggstown, NJ
  • Average sunshine days in May: 15 days

The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is July (13.3 days).

Average UV index in May - Griggstown, 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 - Griggstown, NJ
  • Average cloud cover in May: 46

Months with the most cloud cover are February, March and December (Cloud cover 47).
Months with the least cloud cover are July and August (Cloud cover 33).

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

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