Climate and monthly weather forecastSouthport, CT
Climate and monthly weather forecast
The climate of Southport
Southport, Connecticut falls under the Köppen climate classification as the Cfa type, indicating a predominately humid subtropical climate with no dry seasonal variances. Geographically, Southport is characterized by significant temperature variances, abundant humidity, and precipitation throughout the year.This diverse location experiences a wide range of weather conditions due to the interaction of annual temperature fluctuations, humidity levels, and rain events. Temperatures throughout the year range from a chill 26.6°F (-3°C) in the colder months to an elevated 81°F (27.2°C) during summer's peak. This location benefits from a balanced humidity level, ranging modestly from 72% to 76% across the year.
Unsurprisingly, precipitation is a significant characteristic of the Southport weather, with rainfall volumes fluctuating between 2.48" (63mm) and 4.21" (107mm) monthly, and the number of rainfall days varying from 9.4 to 18.1 days in any given month. Although snowy days are rare, snowfall does occur primarily from December to February, with 2.13" (54mm) and 2.4" (61mm) being relatively frequent within this season.
The best time to visit Southport
The finest time to appreciate the beauty of Southport lies between May and August, when the weather condition is typically warm to hot and rainfall is less excessive. During these months, the maximum temperature is from 64.9°F (18.3°C) to 81°F (27.2°C) with the daylight hours extending from 14.5 to 15.1 hours. As a visitor, this provides ample time to explore Southport’s attractions and engage in outdoor activities.The worst time to visit Southport
Consider avoiding a visit to Southport between December and February; this period registers the lowest temperatures, fluctuating between 26.6°F (-3°C) and 38.3°F (3.5°C). The daylight hours are also significantly shorter, with only 9.3 hours to 10.7 hours of light in a day. The rainfall is considerably high, especially in December when it reaches 4.21" (107mm), which may limit outdoor activities.Spring weather in Southport
Spring in Southport, between March and May, is a time of transformation. The temperature rises from 44.2°F (6.8°C) to 64.9°F (18.3°C) signalling the departure of the winter season. This period also observes slightly increasing rainfall from 2.91" (74mm) to 3.03" (77mm). Despite the onset of the rain, the number of sunshine hours also gradually increases, reaching up to 8.8 hours, allowing for bright and warmer days ahead.Summer weather in Southport
From June to August, Southport enjoys the warm to hot summer season. The temperatures range from 73.8°F (23.2°C) to 81°F (27.2°C), allowing residents and visitors to take full advantage of the coastal area's leisure activities. Rainfall reaches its peak at 3.82" (97mm) in July, providing respite from the summer heat. Moreover, long daylight hours, extending up to 15.1 hours, and considerably high sunshine hours, maximum of 10.6 hours, dominate this season, creating ideal conditions for outdoor pursuits.Autumn weather in Southport
Autumn, from September to November, in Southport is characterized by decreasing temperatures from 73°F (22.8°C) to 50.9°F (10.5°C). Rainfall is sporadic, with the highest volume experienced in October at 3.54" (90mm). Daylight hours shrink from 12.5 hours to 9.9 hours, while the sunshine hours gradually decrease to 5.7 hours by November. Despite these changes, the autumn season still offers ample opportunity to experience Southport's tranquility and natural beauty.Winter weather in Southport
The onset of winter in Southport starts from December and carries on through February. The season registers the lowest temperatures, varying from 26.6°F (-3°C) to 38.3°F (3.5°C), along with prominent rainfall, especially in December with a high of 4.21" (107mm). Daylight hours are considerably fewer, between 9.3 hours and 10.7 hours, with sunshine hours dropping to 4.8 hours in December. Despite the chill, the winter season's serene ambiance offers a quiet charm to the region.Weather in January
Southport, Connecticut, starts the year with a chill in its weather. The relatively high humidity and low temperature make January a cold month. With an average sea temperature of 41.5°F (5.3°C), it is not exactly the time for water-based outdoor activities. Weather in January »Weather in February
With temperatures inching incrementally higher than January, February does not show a significant difference in weather experience. Yet, there is the highest snowfall for the year with 2.4" (61mm) of snow taking center stage in the outdoor environment. Weather in February »Weather in March
In March, the coastal city of Southport experiences a transition in its weather essence. While the slight increase in temperature compared to February indicates a slow march towards warmer months, it remains at a chill reminiscent of winter. Weather in March »Weather in April
As the mid-year approaches, Southport's weather conditions become more tolerable with even warmer temperatures. There's the noteworthy absence of snowfall, an indication that winter has fully retreated making way for spring. However, the humidity levels remain consistent and high, keeping the air relatively cool and moist. Weather in April »Weather in May
Southport basks in the warmth of May as the city's weather transitions into a summer setting. With increased temperatures compared to April, it provides an ideal condition for various outdoor activities. Additionally, the sea temperatures become more adapted for water games, but the relatively high rainfall indicates a possibility of sudden showers. Weather in May »Weather in June
June in Southport brings the much-awaited summer season. Despite the soaring temperatures from May, it isn't the warmest month yet. However, it does possess the most prolonged daylight hours of the year extending opportunities for outdoor activities. Weather in June »Weather in July
July is synonymous with warmth in Southport, Connecticut. This month witnesses the highest temperatures of the year, offering plenty more opportunities for outdoor activities than June. Notably, the sea temperature reaches 70.9°F (21.6°C) making it quite conducive for swimming. Weather in July »Weather in August
The warmth of July extends into August as Southport continues to experience summer heat. Despite a slight decrease in temperatures from July, August records equally high seawater temperatures. With the extended daylight conditions consistent with July, it grants ample time for outdoor activities. Weather in August »Weather in September
Southport, in September, begins its descent towards cooler weather from the summer peaks. There is a significant drop in temperatures from August, signaling the onset of the fall season. However, the sea temperatures, although lower than August, remain relatively warm allowing for water-based activities. Weather in September »Weather in October
October brings with it a more noticeable dip in temperatures relative to September, heralding the city's swing towards the colder months. Southport's weather in this month experiences a more pronounced fall mode. With the sea temperatures dropping further, the time for water activities reduces. Weather in October »Weather in November
November's arrival in Southport, Connecticut, signifies a further march into chillier territory. The city begins to experience temperatures that mirror the early wintertime of the year, coupled with diminishing daylight hours. Weather in November »Weather in December
Winter fully takes over in December forming the coldest month in Southport after January. The city is characterized by cold temperatures and a drop in precipitation intensity, with the most significant rainfall amount seen of 4.21" (107mm). Weather in December »Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The coldest time of the year is January, with temperatures averaging a high of 36.1°F (2.3°C) and a low of 26.6°F (-3°C).
The month with the least rainfall in Southport is January, when the rain falls for 9.4 days and typically collects 2.48" (63mm) of precipitation.
In Southport, Connecticut, during the entire year, the rain falls for 170.1 days and collects up to 37.76" (959mm) of precipitation.
Months with snowfall are January through April, November and December.
Throughout the year, in Southport, Connecticut, there are 24.9 snowfall days, and 9.41" (239mm) of snow is accumulated.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
February is the month with the coldest seawater in Southport, Connecticut, with an average ocean temperature of 39°F (3.9°C).
The months with the least sunshine are February and December, with an average of 4.8h of sunshine.
March is the month with the most snowfall in Southport. Snow falls for 5.3 days and accumulates 2.8" (71mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
April and November, with an average relative humidity of 72%, are the least humid months in Southport.
May and June, with an average relative humidity of 76%, are most humid months.
In Southport, snow does not fall in May through October.
June has the longest days of the year in Southport, Connecticut, with an average of 15h and 6min of daylight.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Southport.
Southport, Connecticut, experiences its highest temperatures in July, with an average peak of 81°F (27.2°C) and a low of 68.5°F (20.3°C).
With an average of 10.6h of sunshine, July has the most sunshine of the year in Southport, Connecticut.
The month with the warmest seawater in Southport is August, with an average ocean temperature of 73°F (22.8°C).
December is the month with the most rainfall in Southport, Connecticut. Rain falls for 12.7 days and accumulates 4.21" (107mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Southport, CT
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (36.1°F).
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure
Southport, CT
- Average pressure in January:
30.04"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.05"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:
30.02"Hg - Average pressure in November:
30.09"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Southport, CT
- Average wind speed in January:
10.5mph - Average wind speed in February:
10.1mph - Average wind speed in March:
10.2mph - Average wind speed in April:
9.4mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.8mph - Average wind speed in August:
6.8mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.4mph - Average wind speed in November:
9.9mph - Average wind speed in December:
10.2mph
The windiest month (with the highest average wind speed) is January (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).
Average humidity
Southport, CT
The months with the highest relative humidity are May and June (76%).
The months with the lowest relative humidity are April and November (72%).
Average rainfall
Southport, CT
- Average rainfall in January:
2.48" - Average rainfall in February:
2.56" - Average rainfall in March:
2.91" - Average rainfall in April:
3.15" - Average rainfall in May:
3.03" - Average rainfall in June:
3.11"
- Average rainfall in July:
3.82" - Average rainfall in August:
3.35" - Average rainfall in September:
2.56" - Average rainfall in October:
3.54" - Average rainfall in November:
3.03" - Average rainfall in December:
4.21"
The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is January (2.48").
Average rainfall days
Southport, CT
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
10.5 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
18.1 days - Average rainfall days in August:
17 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
14.7 days - Average rainfall days in November:
10.7 days - Average rainfall days in December:
12.7 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
Southport, CT
The month with the highest snowfall is March (2.8").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Southport, CT
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
7 days - Average snowfall days in March:
5.3 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0 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:
0.1 days - Average snowfall days in November:
0.5 days - Average snowfall days in December:
4.3 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average sea temperature
Southport, CT
The best month for swimming (with the highest average sea temperature) is August (73°F).
The coldest month (with the lowest average sea temperature) is February (39°F).
Average daylight / Average sunshine
Southport, CT
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
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 6min - Average sunshine in February:
4h and 48min - Average sunshine in March:
6h and 18min - Average sunshine in April:
8h and 30min - Average sunshine in May:
8h and 48min - Average sunshine in June:
9h and 42min
- Average sunshine in July:
10h and 36min - Average sunshine in August:
10h and 30min - Average sunshine in September:
9h and 0min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 42min - Average sunshine in December:
4h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days
Southport, CT
- Average sunshine days in January:
16.6 days - Average sunshine days in February:
12.7 days - Average sunshine days in March:
13.3 days - Average sunshine days in April:
12.5 days - Average sunshine days in May:
11.8 days - Average sunshine days in June:
11.2 days
- Average sunshine days in July:
11.5 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
14.2 days - Average sunshine days in October:
14.5 days - Average sunshine days in November:
17.1 days - Average sunshine days in December:
14.7 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (11.2 days).
Average UV index
Southport, 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
Southport, CT
The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility
Southport, 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).
