April weather forecastSouth Lyme, CT
April
Weather in April
April is a cool spring month in South Lyme, Connecticut, with an average temperature varying between 54.1°F (12.3°C) and 41.7°F (5.4°C).Temperature
With the onset of April, the average high-temperature slightly shifts from March's chilly 43.7°F (6.5°C) to a fresh 54.1°F (12.3°C). During April, the temperature is averaged to a low of 41.7°F (5.4°C) at night.Humidity
April is the least humid month, with an average relative humidity of 73%.Rainfall
In South Lyme, in April, during 10.1 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In South Lyme, during the entire year, the rain falls for 110.7 days and collects up to 8.58" (218mm) of precipitation.Snowfall
In South Lyme, snow does not fall in April through October.Daylight
The average length of the day in April is 13h and 21min.On the first day of April, sunrise is at 6:30 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 7:45 pm EDT.
Sunshine
In South Lyme, Connecticut, the average sunshine in April is 8.5h.UV index
In April, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average UV index of 3 in April transforms into this advice:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in April
South Lyme, CT
- Average high temperature in April: 54.1°F
The warmest month (with the highest average high temperature) is July (79.5°F).
The month with the lowest average high temperature is January (35.4°F).
- Average low temperature in April: 41.7°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).
Average pressure in April
South Lyme, CT
- Average pressure in April: 29.98"Hg
The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in April
South Lyme, CT
- Average wind speed in April: 9.9mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in April
South Lyme, CT
- Average humidity in April: 73%
The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in April
South Lyme, CT
- Average rainfall in April: 0.87"
The wettest month (with the highest rainfall) is December (0.94").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in April
South Lyme, CT
- Average rainfall days in April: 10.1 days
The month with the highest number of rainy days is July (11.5 days).
The months with the least rainy days are February and November (6.6 days).
Average snowfall in April
South Lyme, CT
- Average snowfall in April: 0"
The month with the highest snowfall is March (0.63").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in April
South Lyme, CT
- Average snowfall days in April: 0.3 days
The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in April /
Average sunshine in April
South Lyme, CT
- Average daylight in April: 13h and 24min
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 April: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in April
South Lyme, CT
- Average sunshine days in April: 18.5 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is July (15.8 days).
Average UV index in April
South Lyme, CT
- Average UV index in April: 3
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 April
South Lyme, CT
- Average cloud cover in April: 44
The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in April
South Lyme, CT
- Average visibility in April: 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).
