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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, is another cold winter month in South Lyme, Connecticut, with an average temperature ranging between min 25.7°F (-3.5°C) and max 35.4°F (1.9°C). January tends to be the coldest month, with temperatures averaging a daily high of 35.4°F (1.9°C) and a low of 25.7°F (-3.5°C). Weather in January »
Weather in February
February, the last month of the winter in South Lyme, is also a wintry month, with temperature in the range of an average low of 26.1°F (-3.3°C) and an average high of 37.9°F (3.3°C). The advent of February presents an average high-temperature of a still wintry 37.9°F (3.3°C), maintaining a close correlation with the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in South Lyme, Connecticut, with an average temperature varying between 43.7°F (6.5°C) and 32.5°F (0.3°C). The shift from February to March sees a slight increase in the average high-temperature, transitioning from a wintry 37.9°F (3.3°C) to a chilly 43.7°F (6.5°C). Weather in March »
Weather in April
April in South Lyme, Connecticut, is a fresh spring month, with an average temperature ranging between min 41.7°F (5.4°C) and max 54.1°F (12.3°C). The shift from March to April sees an increase in the average high-temperature, transitioning from a frosty 43.7°F (6.5°C) to a fresh 54.1°F (12.3°C). Weather in April »
Weather in May
The last month of the spring, May, is an enjoyable month in South Lyme, Connecticut, with an average temperature varying between 64.8°F (18.2°C) and 50.5°F (10.3°C). The beginning of May signals a rise in the average high-temperature, moving from a fresh 54.1°F (12.3°C) in April to a refreshing 64.8°F (18.2°C). Weather in May »
Weather in June
June, the first month of the summer in South Lyme, is an agreeable month, with an average temperature ranging between min 58.8°F (14.9°C) and max 72.7°F (22.6°C). As May transitions into June, a subtle temperature shift is observed, with average highs adjusting from a comfortable 64.8°F (18.2°C) to an agreeable 72.7°F (22.6°C). Weather in June »
Weather in July
July in South Lyme, Connecticut, is a moderately hot summer month, with an average temperature fluctuating between 66.4°F (19.1°C) and 79.5°F (26.4°C). South Lyme's temperatures peak on average in July, reaching 79.5°F (26.4°C) at their highest and 66.4°F (19.1°C) at their lowest. Weather in July »
Weather in August
August, the last month of the summer in South Lyme, is also a moderately hot month, with an average temperature varying between 65.7°F (18.7°C) and 78.4°F (25.8°C). The advent of August sees the average high-temperature at a still warm 78.4°F (25.8°C), subtly shifted from July's 79.5°F (26.4°C). Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in South Lyme, Connecticut, with an average temperature fluctuating between 59.7°F (15.4°C) and 72.1°F (22.3°C). With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 78.4°F (25.8°C) in August to an agreeable 72.1°F (22.3°C). Weather in September »
Weather in October
October, like September, in South Lyme, Connecticut, is another refreshing autumn month, with an average temperature ranging between max 61.7°F (16.5°C) and min 50.5°F (10.3°C). October's arrival coincides with a drop in the average high-temperature, decreasing from September's agreeable 72.1°F (22.3°C) to an enjoyable 61.7°F (16.5°C). Weather in October »
Weather in November
November, the last month of the autumn in South Lyme, is another cool month, with temperature in the range of an average low of 39.9°F (4.4°C) and an average high of 50.9°F (10.5°C). November brings a drop in South Lyme's average high-temperature, falling from a refreshing 61.7°F (16.5°C) in October to a fresh 50.9°F (10.5°C). Weather in November »
Weather in December
The first month of the winter, December, is also an icy month in South Lyme, Connecticut, with temperature in the range of an average low of 32.4°F (0.2°C) and an average high of 41.9°F (5.5°C). In the transition to December, South Lyme observes a drop in the average high-temperature, moving from a fresh 50.9°F (10.5°C) in November to a wintry 41.9°F (5.5°C). Weather in December »
[Resources]Frequently asked questions
What part of the year is the coldest in South Lyme?
South Lyme's coldest temperatures are experienced in January, with average high temperatures of 35.4°F (1.9°C) and lows of 25.7°F (-3.5°C).
How many days does it rain in South Lyme?
Throughout the year, in South Lyme, there are 110.7 rainfall days, and 8.58" (218mm) of precipitation is accumulated.
When does it snow in South Lyme?
Months with snowfall are January through March, November and December.
How many days does it snow in South Lyme?
Throughout the year, in South Lyme, there are 18.4 snowfall days, and 1.69" (43mm) of snow is accumulated.
When is the lowest UV index in South Lyme?
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
What is the month with the least sunshine in South Lyme?
February and December, with an average of 4.8h of sunshine, are months with the least sunshine in South Lyme.
What is the snowiest month in South Lyme?
March is the month with the most snowfall in South Lyme, Connecticut. Snow falls for 3.8 days and accumulates 0.63" (16mm) of snow.
When is Daylight Saving Time (DST) in South Lyme?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in South Lyme, Connecticut, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
What is the least humid month in South Lyme?
April is the least humid month in South Lyme, with an average relative humidity of 73%.
When it does not snow in South Lyme?
April through October are months without snowfall.
What is the most humid month in South Lyme?
June and July, with an average relative humidity of 79%, are most humid months in South Lyme.
When are the longest days in South Lyme?
With an average of 15h and 6min of daylight, June has the longest days of the year.
When is the highest UV index in South Lyme?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What time of the year is the hottest in South Lyme?
South Lyme's warmest month, July, registers temperatures that range from a high of 79.5°F (26.4°C) to a low of 66.4°F (19.1°C).
What is the month with the most sunshine in South Lyme?
July and August, with an average of 10.6h of sunshine, are months with the most sunshine in South Lyme, Connecticut.
What is the driest month in South Lyme?
September is the month with the least rainfall in South Lyme. Rain falls for 9.1 days and accumulates 0.35" (9mm) of precipitation.
What is the rainiest month in South Lyme?
December is the month with the most rainfall. Rain falls for 9.5 days and accumulates 0.94" (24mm) of precipitation.
What is the month with the shortest days in South Lyme?
With an average of 9h and 18min of daylight, December has the shortest days of the year in South Lyme, Connecticut.
Average temperature
South Lyme, CT
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).
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
South Lyme, CT
- Average pressure in January:
30.03"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.05"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.05"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
South Lyme, CT
- Average wind speed in January:
11.1mph - Average wind speed in February:
10.6mph - Average wind speed in March:
10.6mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.5mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
7.2mph - Average wind speed in August:
7.3mph - Average wind speed in September:
8.1mph - Average wind speed in October:
9.7mph - Average wind speed in November:
10.3mph - Average wind speed in December:
10.7mph
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
South Lyme, CT
The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall
South Lyme, CT
- Average rainfall in January:
0.55" - Average rainfall in February:
0.51" - Average rainfall in March:
0.59" - Average rainfall in April:
0.87" - Average rainfall in May:
0.75" - Average rainfall in June:
0.79"
- Average rainfall in July:
0.83" - Average rainfall in August:
0.71" - Average rainfall in September:
0.35" - Average rainfall in October:
0.87" - Average rainfall in November:
0.83" - Average rainfall in December:
0.94"
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
South Lyme, CT
- Average rainfall days in January:
6.8 days - Average rainfall days in February:
6.6 days - Average rainfall days in March:
9.3 days - Average rainfall days in April:
10.1 days - Average rainfall days in May:
11.2 days - Average rainfall days in June:
10 days
- Average rainfall days in July:
11.5 days - Average rainfall days in August:
11.1 days - Average rainfall days in September:
9.1 days - Average rainfall days in October:
8.9 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
9.5 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
South Lyme, CT
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
South Lyme, CT
- Average snowfall days in January:
5.4 days - Average snowfall days in February:
4.7 days - Average snowfall days in March:
3.8 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.9 days - Average snowfall days in December:
3.2 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 / Average sunshine
South Lyme, CT
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 2min
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 January:
5h and 1min - Average sunshine in February:
4h and 5min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 3min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 3min
- Average sunshine in July:
10h and 4min - Average sunshine in August:
10h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
6h and 1min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
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
South Lyme, CT
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
18 days - Average sunshine days in March:
19.2 days - Average sunshine days in April:
18.5 days - Average sunshine days in May:
17.1 days - Average sunshine days in June:
17.4 days
- Average sunshine days in July:
15.8 days - Average sunshine days in August:
16.8 days - Average sunshine days in September:
19.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
21.1 days - Average sunshine days in December:
19.7 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
South Lyme, CT
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
South Lyme, CT
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
South Lyme, CT
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).
South Lyme, Connecticut, USA
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