April weather forecast and climate
Old Greenwich, CT

Weather in April

April in Old Greenwich, Connecticut, is a moderate spring month, with temperature in the range of an average low of 43.5°F (6.4°C) and an average high of 55.4°F (13°C).

Temperature

In Old Greenwich, the average high-temperature in April rises, from a chilly 45°F (7.2°C) in March, to a moderate 55.4°F (13°C). In Old Greenwich, the average low-temperature is 43.5°F (6.4°C).

Humidity

The average relative humidity in Old Greenwich is 72%.

Rainfall

In Old Greenwich, during April, the rain falls for 15.9 days and regularly aggregates up to 3.15" (80mm) of precipitation. In Old Greenwich, during the entire year, the rain falls for 166.6 days and collects up to 38.07" (967mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. April is the last month it regularly snows. During 0.3 snowfall days, in April, Old Greenwich aggregates 0.08" (2mm) of snow. In Old Greenwich, during the entire year, snow falls for 24.8 days, and aggregates up to 9.33" (237mm) of snow.

Ocean temperature

In April, the average ocean temperature is 44.2°F (6.8°C).
Note: Swimming in 44.2°F (6.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

In April, the average length of the day in Old Greenwich is 13.3h.

Sunshine

In April, the average sunshine in Old Greenwich is 8.2h.

UV index

The average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for average individuals.
Note: In April, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in April in Old Greenwich?

The average relative humidity in April is 72%.

How many days does it rain in April in Old Greenwich?

In Old Greenwich, in April, during 15.9 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

What is the last month it snows in Old Greenwich?

April is the last month it regularly snows. During 0.3 snowfall days, in April, Old Greenwich aggregates 0.08" (2mm) of snow.

What is the water temperature in April in Old Greenwich?

In Old Greenwich, Connecticut, in April, the average water temperature is 44.2°F (6.8°C). Swimming in 44.2°F (6.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Old Greenwich have in April?

The average length of the day in April in Old Greenwich, Connecticut, is 13.3h.

How many hours of sunshine does Old Greenwich have in April?

In April, the average sunshine is 8.2h.

What is the UV index intensity in April in Old Greenwich?

In Old Greenwich, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in April
Old Greenwich, CT

Average temperature in April - Old Greenwich, CT
  • Average high temperature in April: 55.4°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in April: 43.5°F

The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (26.2°F).

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Average pressure in April
Old Greenwich, CT

Average pressure in April - Old Greenwich, CT
  • Average pressure in April: 29.98"

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

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Average wind speed in April
Old Greenwich, CT

Average wind speed in April - Old Greenwich, CT
  • Average wind speed in April: 9.1mph

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).

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Average humidity in April
Old Greenwich, CT

Average humidity in April - Old Greenwich, CT
  • Average humidity in April: 72%

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

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Average rainfall in April
Old Greenwich, CT

Average rainfall in April - Old Greenwich, CT
  • Average rainfall in April: 3.15"

The wettest month (with the highest rainfall) is July (4.13").
The driest month (with the least rainfall) is January (2.44").

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Average rainfall days in April
Old Greenwich, CT

Average rainfall days in April - Old Greenwich, CT
  • Average rainfall days in April: 15.9 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.6 days).

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Average snowfall in April
Old Greenwich, CT

Average snowfall in April - Old Greenwich, CT
  • Average snowfall in April: 0.08"

The month with the highest snowfall is February (2.6").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in April
Old Greenwich, CT

Average snowfall days in April - Old Greenwich, CT
  • Average snowfall days in April: 0.3 days

The month with the highest number of snowfall days is February (7.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in April
Old Greenwich, CT

Average sea temperature in April - Old Greenwich, CT
  • Average sea temperature in April: 44.3°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 April /
Average sunshine in April
Old Greenwich, CT

Average daylight in April / Average sunshine in April - Old Greenwich, CT
  • Average daylight in April: 13.3h

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 April: 8.2h

The month with the most sunshine is July (Average sunshine: 10.5h).
Months with the least sunshine are February and December (Average sunshine: 4.7).

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Average sunshine days in April
Old Greenwich, CT

Average sunshine days in April - Old Greenwich, CT
  • Average sunshine days in April: 12.2 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is June (11.1 days).

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Average UV index in April
Old Greenwich, CT

Average UV index in April - Old Greenwich, CT
  • Average UV index in April: 3

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).

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Average cloud cover in April
Old Greenwich, CT

Average cloud cover in April - Old Greenwich, CT
  • Average cloud cover in April: 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).

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Average visibility in April
Old Greenwich, CT

Average visibility in April - Old Greenwich, CT
  • Average visibility in April: 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).

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