May weather forecast
Stamford, CT

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A wide aerial scenic cover shot over downtown Stamford, Connecticut, with two rivers and weighty rain clouds in the sky above
A wide aerial scenic cover shot over downtown Stamford, Connecticut, with two rivers and weighty rain clouds in the sky above

Weather in May

May comes basked in warmth and welcoming brightness. Stamford experiences a marked increase in temperature, climbing up the Fahrenheit scale to reach an agreeable average of 65.8°F (18.8°C). However, it's worth noting that May also offers a considerable amount of rainfall. The sea, now warming up makes the coastline a popular spot among locals and visitors alike. Preceding the onset of Stamford's hottest season, May serves as the perfect blend of pleasant temperature and inviting daylight hours.

Temperature

Observing a rise in May, the average high-temperature goes from April's moderate 55.4°F (13°C) to an enjoyable 65.8°F (18.8°C). The nighttime temperature, during May, averages of 53.1°F (11.7°C).

Humidity

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

Rainfall

In May, the rain falls for 17.2 days. Throughout May, 3.11" (79mm) of precipitation is accumulated. Throughout the year, there are 164.1 rainfall days, and 37.95" (964mm) of precipitation is accumulated.

Snowfall

In Stamford, snow does not fall in May through October.

Ocean temperature

In May, the average ocean temperature is 51.4°F (10.8°C).
Note: Navigating the 51.4°F (10.8°C) at 55.4°F (13°C) is no joy, and temperatures less than 50°F (10°C) can threaten breathing and cause a chilling shock, gauging personal stamina.

Daylight

In Stamford, the average length of the day in May is 14h and 30min.
On the first day of the month, sunrise is at 5:50 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

In Stamford, the average sunshine in May is 8.7h.

UV index

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 5 during May translates into the following guidance:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Stamford in May?

May temperatures vary between a high-temperature of 65.8°F (18.8°C) and a low-temperature of 53.1°F (11.7°C).

What is the most humid month?

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

What is the average humidity in May?

The average relative humidity in May is 75%.

How much does it rain in May?

In Stamford, in May, it is raining for 17.2 days, with typically 3.11" (79mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

Does it snow in May?

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

What is the water temperature in May?

In Stamford, the average seawater temperature in May is 51.4°F (10.8°C). Swimming in 51.4°F (10.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in May?

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

When is the sunrise / sunset in May?

On the first day of May, sunrise is at 5:50 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 Stamford?

The average sunshine duration in May is 8.7h.

How high is the UV index in May?

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

Average temperature in May
Stamford, CT

Average temperature in May - Stamford, CT
  • Average high temperature in May: 65.8°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (36°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 (26.6°F).

Average pressure in May
Stamford, CT

Average pressure in May - Stamford, 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).

Average wind speed in May
Stamford, CT

Average wind speed in May - Stamford, CT
  • Average wind speed in May: 7.6mph

The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

Average humidity in May
Stamford, CT

Average humidity in May - Stamford, CT
  • Average humidity in May: 75%

The months with the highest relative humidity are February, May, June and December (75%).
The months with the lowest relative humidity are April, August and November (72%).

Average rainfall in May
Stamford, CT

Average rainfall in May - Stamford, CT
  • Average rainfall in May: 3.11"

The wettest month (with the highest rainfall) is July (4.25").
The driest months (with the least rainfall) are January and February (2.36").

Average rainfall days in May
Stamford, CT

Average rainfall days in May - Stamford, CT
  • Average rainfall days in May: 17.2 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).

Average snowfall in May
Stamford, CT

Average snowfall in May - Stamford, CT
  • Average snowfall in May: 0"

The months with the highest snowfall are February and March (2.44").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Stamford, CT

Average snowfall days in May - Stamford, CT
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature in May
Stamford, CT

Average sea temperature in May - Stamford, 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).

Average daylight in May /
Average sunshine in May
Stamford, CT

Average daylight in May / Average sunshine in May - Stamford, CT
  • Average daylight in May: 14h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in May: 8h and 4min

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).

Average sunshine days in May
Stamford, CT

Average sunshine days in May - Stamford, CT
  • Average sunshine days in May: 11.8 days

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

Average UV index in May
Stamford, CT

Average UV index in May - Stamford, 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).

Average cloud cover in May
Stamford, CT

Average cloud cover in May - Stamford, CT
  • Average cloud cover in May: 45

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

Average visibility in May
Stamford, CT

Average visibility in May - Stamford, 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).

Stamford, Connecticut, USA

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