May weather forecast
Annandale, NJ

Weather in May

The last month of the spring, May, is a pleasant month in Annandale, New Jersey, with average temperature fluctuating between 69.6°F (20.9°C) and 51.1°F (10.6°C).

Temperature

In May, the average high-temperature rises, from a mild 59°F (15°C) in April, to a pleasant 69.6°F (20.9°C). In Annandale, the average low-temperature is 51.1°F (10.6°C).

Humidity

The average relative humidity in May is 79%.

Rainfall

In Annandale, during May, the rain falls for 16.4 days and regularly aggregates up to 3.07" (78mm) of precipitation. In Annandale, during the entire year, the rain falls for 162.3 days and collects up to 32.83" (834mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Annandale, New Jersey. During 0.2 snowfall days, in May, Annandale aggregates 0.55" (14mm) of snow. Throughout the year, there are 27.8 snowfall days, and 15.35" (390mm) of snow is accumulated.

Daylight

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

Sunshine

In May, the average sunshine is 8.5h.

UV index

In Annandale, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard 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 solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Annandale?

The average relative humidity in May in Annandale, New Jersey, is 79%.

How much does it rain in Annandale in May?

In Annandale, in May, during 16.4 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

What is the last month it snows in Annandale?

May is the last month it regularly snows in Annandale, New Jersey. During 0.2 snowfall days, in May, Annandale aggregates 0.55" (14mm) of snow.

How many hours of daylight does Annandale have in May?

In May, the average length of the day in Annandale, New Jersey, is 14.5h.

How long on average sun shines in May in Annandale?

The average sunshine in May in Annandale is 8.5h.

What is the UV index reading in May in Annandale?

The average daily maximum UV index in May in Annandale is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in May
Annandale, NJ

Average temperature in May - Annandale, NJ
  • Average high temperature in May: 69.6°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in May: 51.1°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in May
Annandale, NJ

Average pressure in May - Annandale, NJ
  • Average pressure in May: 30.01"

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

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Average wind speed in May
Annandale, NJ

Average wind speed in May - Annandale, NJ
  • Average wind speed in May: 6.3mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity in May
Annandale, NJ

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

Months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in May
Annandale, NJ

Average rainfall in May - Annandale, NJ
  • Average rainfall in May: 3.07"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.89").

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Average rainfall days in May
Annandale, NJ

Average rainfall days in May - Annandale, NJ
  • Average rainfall days in May: 16.4 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is January (8.8 days).

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Average snowfall in May
Annandale, NJ

Average snowfall in May - Annandale, NJ
  • Average snowfall in May: 0.55"

The month with the highest snowfall is March (4.76").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Annandale, NJ

Average snowfall days in May - Annandale, NJ
  • Average snowfall days in May: 0.2 days

Months with the highest number of snowfall days are January and February (8 days).
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
Annandale, NJ

Average daylight in May / Average sunshine in May - Annandale, 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: 8.5h

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

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Average sunshine days in May
Annandale, NJ

Average sunshine days in May - Annandale, NJ
  • Average sunshine days in May: 12.3 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (11 days).

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Average UV index in May
Annandale, NJ

Average UV index in May - Annandale, 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).

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Average cloud cover in May
Annandale, NJ

Average cloud cover in May - Annandale, 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).

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Average visibility in May
Annandale, NJ

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

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

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