May weather forecast and climate
Summit, NJ

May, the last month of the spring, in Summit, is an agreeable month, with average temperature ranging between max 69.1°F (20.6°C) and min 51.4°F (10.8°C).

Temperature

In Summit, the average high-temperature in May increases, from a mild 58.5°F (14.7°C) in April, to an agreeable 69.1°F (20.6°C). In Summit, the average low-temperature is 51.4°F (10.8°C).

Humidity

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

Rainfall

In Summit, in May, it is raining for 17.3 days, with typically 2.91" (74mm) of accumulated precipitation. Throughout the year, in Summit, New Jersey, there are 164.2 rainfall days, and 30.67" (779mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. May is the last month it regularly snows in Summit, New Jersey. During 0.1 snowfall days, in May, Summit aggregates 0.24" (6mm) of snow. In Summit, during the entire year, snow falls for 26 days, and aggregates up to 11.61" (295mm) of snow.

Daylight

The average length of the day in May is 14.5h.

Sunshine

In May, the average sunshine is 8.4h.

UV index

In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 5 transform into the following instructions:
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. 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 Summit?

In May, the average high-temperature is 69.1°F (20.6°C), and the average low-temperature is 51.4°F (10.8°C).

What is the average humidity in May in Summit?

In May, the average relative humidity is 77%.

How much does it rain in Summit in May?

In Summit, New Jersey, in May, during 17.3 rainfall days, 2.91" (74mm) of precipitation is typically accumulated.

What is the last month it snows in Summit?

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

How many hours of daylight does Summit have in May?

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

How long on average sun shines in May in Summit?

The average sunshine in May in Summit is 8.4h.

How high is the UV index in May in Summit?

In Summit, New Jersey, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.
Average temperature in May - Summit, NJ
  • Average high temperature in May: 69.1°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in May: 51.4°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure in May - Summit, 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").

Average wind speed in May - Summit, NJ
  • Average wind speed in May: 6.6mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

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

Months with the highest relative humidity are February and December (80%).
Months with the lowest relative humidity are April and August (74%).

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

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

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

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall in May - Summit, NJ
  • Average snowfall in May: 0.24"

The month with the highest snowfall is March (3.5").
Months with the least snowfall are June, July, August and September (0").

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

The month with the highest number of snowfall days is January (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Summit, 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: 8.4h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in May - Summit, NJ
  • Average sunshine days in May: 12.1 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

Average UV index in May - Summit, 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 - Summit, NJ
  • Average cloud cover in May: 47

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

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

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).