May weather forecast and climate
Riverview, DE

May, the last month of the spring, in Riverview, is a pleasant month, with temperature in the range of an average high of 70.9°F (21.6°C) and an average low of 56.7°F (13.7°C).

Temperature

In Riverview, the average high-temperature in May rises, from an enjoyable 61.5°F (16.4°C) in April, to a pleasant 70.9°F (21.6°C). In May, in Riverview, the average low-temperature is 56.7°F (13.7°C).

Humidity

May, August and September, with an average relative humidity of 79%, are most humid months.

Rainfall

In Riverview, it is raining for 17.8 days, with typically 3.11" (79mm) of accumulated precipitation. In Riverview, during the entire year, the rain falls for 167.5 days and collects up to 35.35" (898mm) of precipitation.

Snowfall

May through October are months without snowfall in Riverview.

Daylight

In Riverview, the average length of the day in May is 14.3h.

Sunshine

In May, the average sunshine is 8.8h.

UV index

Months with the highest UV index in Riverview are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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.

What is the temperature in May in Riverview?

In Riverview, in May, the average high-temperature is 70.9°F (21.6°C), and the average low-temperature is 56.7°F (13.7°C).

What are the most humid months in Riverview?

Months with the highest humidity are May, August and September, with an average relative humidity of 79%.

What is the average humidity in May in Riverview?

In May, the average relative humidity in Riverview is 79%.

How much does it rain in Riverview in May?

In Riverview, Delaware, in May, during 17.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

Does it snow in Riverview in May?

In May, in Riverview, it doesn't snow. April is the latest month when it typically snows.

When it does not snow in Riverview?

May through October are months without snowfall in Riverview, Delaware.

How many hours of daylight does Riverview have in May?

In Riverview, the average length of the day in May is 14.3h.

How many hours of sunshine does Riverview have in May?

In May, the average sunshine in Riverview, Delaware, is 8.8h.

When is the highest UV index in Riverview?

Months with the highest UV index in Riverview, Delaware, are May through August, with an average maximum UV index of 6.

How high is the UV index in May in Riverview?

The average daily maximum UV index in May in Riverview is 6. A UV Index reading of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in May - Riverview, DE
  • Average high temperature in May: 70.9°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in May: 56.7°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

Average pressure in May - Riverview, DE
  • Average pressure in May: 30.02"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

Average wind speed in May - Riverview, DE
  • Average wind speed in May: 8.1mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

Average humidity in May - Riverview, DE
  • Average humidity in May: 79%

Months with the highest relative humidity are May, August and September (79%).
Months with the lowest relative humidity are January, March, April and November (74%).

Average rainfall in May - Riverview, DE
  • Average rainfall in May: 3.11"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (2.13").

Average rainfall days in May - Riverview, DE
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (9 days).

Average snowfall in May - Riverview, DE
  • Average snowfall in May: 0"

The month with the highest snowfall is January (1.93").
Months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May - Riverview, DE
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (4.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in May / Average sunshine in May - Riverview, DE
  • Average daylight in May: 14.3h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in May: 8.8h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in May - Riverview, DE
  • Average sunshine days in May: 10.8 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (9.7 days).

Average UV index in May - Riverview, DE
  • Average UV index in May: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in May - Riverview, DE
  • Average cloud cover in May: 43

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in May - Riverview, DE
  • Average visibility in May: 6mi

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