May weather forecast
Cornwall, CT

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Weather in May

The last month of the spring, May, is a comfortable month in Cornwall, Connecticut, with an average temperature fluctuating between 47.7°F (8.7°C) and 67.5°F (19.7°C).

Temperature

An upsurge in temperatures occurs as April gives way to May, with average highs shifting from a fresh 55.2°F (12.9°C) to a refreshing 67.5°F (19.7°C). Cornwall witnesses an average low-temperature of 47.7°F (8.7°C) throughout the month of May.

Humidity

In May, the average relative humidity in Cornwall is 77%.

Rainfall

In May, the rain falls for 16.9 days. Throughout May, 3.03" (77mm) of precipitation is accumulated. In Cornwall, Connecticut, during the entire year, the rain falls for 160.5 days and collects up to 33.86" (860mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Cornwall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Cornwall aggregates 0.24" (6mm) of snow. Throughout the year, in Cornwall, there are 40.2 snowfall days, and 20.39" (518mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 34min.
On the first day of May in Cornwall, sunrise is at 5:48 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:20 am and sunset at 8:21 pm EDT.

Sunshine

In May, the average sunshine is 8.2h.

UV index

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 5 in May converts into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. 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. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Frequently asked questions

What is the average May temperature in Cornwall?

In May, the average high-temperature and low-temperature in Cornwall, Connecticut, are 67.5°F (19.7°C) and 47.7°F (8.7°C) respectively.

What is the average humidity in May in Cornwall?

In Cornwall, Connecticut, the average relative humidity in May is 77%.

How many days does it rain in May in Cornwall?

In Cornwall, in May, during 16.9 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

What is the last month it snows in Cornwall?

May is the last month it regularly snows in Cornwall. During 0.3 snowfall days, in May, Cornwall aggregates 0.24" (6mm) of snow.

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

The average day length in May in Cornwall is 14h and 34min.

What time are sunrise and sunset in May in Cornwall?

In May, on the first day of the month, sunrise is at 5:48 am and sunset at 7:52 pm. On the last day of the month, in Cornwall, sunrise is at 5:20 am and sunset at 8:21 pm EDT.

How long on average sun shines in May in Cornwall?

In Cornwall, the average sunshine duration in May is 8.2h.

What is the UV index intensity in May in Cornwall?

The average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Cornwall, CT

Average temperature in May - Cornwall, CT
  • Average high temperature in May: 67.5°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (30.9°F).

  • Average low temperature in May: 47.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in May
Cornwall, CT

Average pressure in May - Cornwall, CT
  • Average pressure in May: 30.01"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Cornwall, CT

Average wind speed in May - Cornwall, CT
  • Average wind speed in May: 6.2mph

The windiest months (with the highest average wind speed) are January and March (8mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

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Average humidity in May
Cornwall, CT

Average humidity in May - Cornwall, CT
  • Average humidity in May: 77%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in May
Cornwall, CT

Average rainfall in May - Cornwall, CT
  • Average rainfall in May: 3.03"

The wettest month (with the highest rainfall) is July (3.54").
The driest month (with the least rainfall) is January (2.17").

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Average rainfall days in May
Cornwall, CT

Average rainfall days in May - Cornwall, CT
  • Average rainfall days in May: 16.9 days

The month with the highest number of rainy days is July (17.9 days).
The month with the least rainy days is January (7.7 days).

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Average snowfall in May
Cornwall, CT

Average snowfall in May - Cornwall, CT
  • Average snowfall in May: 0.24"

The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Cornwall, CT

Average snowfall days in May - Cornwall, CT
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is February (10.3 days).
The 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
Cornwall, CT

Average daylight in May / Average sunshine in May - Cornwall, CT
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in May: 8h and 1min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in May
Cornwall, CT

Average sunshine days in May - Cornwall, CT
  • Average sunshine days in May: 12 days

The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in May
Cornwall, CT

Average UV index in May - Cornwall, CT
  • Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
The 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
Cornwall, CT

Average cloud cover in May - Cornwall, CT
  • Average cloud cover in May: 49

The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are July and August (Cloud cover 37).

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Average visibility in May
Cornwall, CT

Average visibility in May - Cornwall, CT
  • Average visibility in May: 5mi

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

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Cornwall, Connecticut, USA

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