May weather forecast
Cos Cob, CT

Weather in May

May, the last month of the spring in Cos Cob, is a comfortable month, with an average temperature ranging between min 53.1°F (11.7°C) and max 66.2°F (19°C).

Temperature

In May, the average high-temperature increases from a moderate 55.4°F (13°C) in April to a comfortable 66.2°F (19°C). The average low-temperature, in Cos Cob, is 53.1°F (11.7°C).

Humidity

The months with the highest humidity in Cos Cob are February, May and December, with an average relative humidity of 75%.

Rainfall

In Cos Cob, it is raining for 17.5 days, with typically 3.11" (79mm) of accumulated precipitation. Throughout the year, there are 165.6 rainfall days, and 37.64" (956mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Ocean temperature

In May, the average ocean temperature is 51.4°F (10.8°C).
Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

Daylight

In Cos Cob, the average length of the day in May is 14h and 30min.
On the first day of the month, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of May, sunrise is at 5:24 am and sunset at 8:19 pm EDT.

Sunshine

The average sunshine in May in Cos Cob is 8.7h.

UV index

In Cos Cob, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 5 in May transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Cos Cob?

In Cos Cob, in May, the average high-temperature is 66.2°F (19°C), and the average low-temperature is 53.1°F (11.7°C).

What is the most humid month in Cos Cob?

February, May and December, with an average relative humidity of 75%, are most humid months.

What is the average humidity in May in Cos Cob?

In May, the average relative humidity in Cos Cob is 75%.

How many days does it rain in May in Cos Cob?

In May, in Cos Cob, Connecticut, the rain falls for 17.5 days. Throughout May, 3.11" (79mm) of precipitation is accumulated.

When it does not snow in Cos Cob?

In Cos Cob, Connecticut, snow does not fall in May through October.

Does it snow in Cos Cob in May?

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

What is the water temperature in May in Cos Cob?

In May, the average ocean temperature in Cos Cob is 51.4°F (10.8°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the average length of the day in May in Cos Cob?

In May, the average day length is 14h and 30min.

What time are sunrise and sunset in May in Cos Cob?

On the first day of May in Cos Cob, Connecticut, sunrise is at 5:51 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 8:19 pm EDT.

How long on average sun shines in May in Cos Cob?

The average sunshine duration in May in Cos Cob, Connecticut, is 8.7h.

What is the UV index intensity in May in Cos Cob?

In May, the average daily maximum UV index in Cos Cob is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Cos Cob, CT

Average temperature in May - Cos Cob, CT
  • Average high temperature in May: 66.2°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (35.8°F).

  • Average low temperature in May: 53.1°F

The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in May
Cos Cob, CT

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

The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in May
Cos Cob, CT

Average wind speed in May - Cos Cob, CT
  • Average wind speed in May: 7.5mph

The windiest month (with the highest average wind speed) is January (9.9mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in May
Cos Cob, CT

Average humidity in May - Cos Cob, CT
  • Average humidity in May: 75%

The months with the highest relative humidity are February, May and December (75%).
The month with the lowest relative humidity is August (71%).

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Average rainfall in May
Cos Cob, CT

Average rainfall in May - Cos Cob, CT
  • Average rainfall in May: 3.11"

The wettest month (with the highest rainfall) is July (4.13").
The driest months (with the least rainfall) are January and February (2.4").

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Average rainfall days in May
Cos Cob, CT

Average rainfall days in May - Cos Cob, CT
  • Average rainfall days in May: 17.5 days

The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall in May
Cos Cob, CT

Average snowfall in May - Cos Cob, CT
  • Average snowfall in May: 0"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in May
Cos Cob, CT

Average snowfall days in May - Cos Cob, CT
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is January (7.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average sea temperature in May
Cos Cob, CT

Average sea temperature in May - Cos Cob, CT
  • Average sea temperature in May: 51.4°F

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

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Average daylight in May /
Average sunshine in May
Cos Cob, CT

Average daylight in May / Average sunshine in May - Cos Cob, CT
  • Average daylight in May: 14h and 30min

The month with the longest days is June (Average daylight: 15h and 5min).
The month with the shortest days is December (Average daylight: 9h and 17min).

  • Average sunshine in May: 8h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in May
Cos Cob, CT

Average sunshine days in May - Cos Cob, CT
  • Average sunshine days in May: 11.5 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (10.7 days).

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Average UV index in May
Cos Cob, CT

Average UV index in May - Cos Cob, CT
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (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
Cos Cob, CT

Average cloud cover in May - Cos Cob, CT
  • Average cloud cover in May: 44

The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 31).

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Average visibility in May
Cos Cob, CT

Average visibility in May - Cos Cob, CT
  • Average visibility in May: 6mi

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

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