May weather forecastOld Lyme, CT
May
Weather in May
May, the last month of the spring in Old Lyme, is an enjoyable month, with temperature in the range of an average high of 64.8°F (18.2°C) and an average low of 50.5°F (10.3°C).Temperature
The start of May is characterized by an increase in the average high-temperature, transitioning from a fresh 54.1°F (12.3°C) in April to a refreshing 64.8°F (18.2°C). In Old Lyme, an average nighttime temperature of 50.5°F (10.3°C) is expected during May.Humidity
The average relative humidity in May is 78%.Rainfall
In Old Lyme, in May, it is raining for 11.2 days, with typically 0.75" (19mm) of accumulated precipitation. Throughout the year, there are 110.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Old Lyme, the average length of the day in May is 14h and 31min.On the first day of May in Old Lyme, sunrise is at 5:45 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:15 pm EDT.
Sunshine
The average sunshine in May in Old Lyme is 8.7h.UV index
In May, the average daily maximum UV index in Old Lyme is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum UV index of 5 in May translates into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Old Lyme, CT
- Average high temperature in May: 64.8°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 May: 50.5°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 May
Old Lyme, CT
- Average pressure in May: 30.01"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 May
Old Lyme, CT
- Average wind speed in May: 8.5mph
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 May
Old Lyme, CT
- Average humidity in May: 78%
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 May
Old Lyme, CT
- Average rainfall in May: 0.75"
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 May
Old Lyme, CT
- Average rainfall days in May: 11.2 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 May
Old Lyme, CT
- Average snowfall in May: 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 May
Old Lyme, CT
- Average snowfall days in May: 0.1 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 May /
Average sunshine in May
Old Lyme, CT
- Average daylight in May: 14h and 30min
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 42min
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 May
Old Lyme, CT
- Average sunshine days in May: 17.1 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 May
Old Lyme, 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
Old Lyme, CT
- Average cloud cover in May: 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 May
Old Lyme, 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).
