Climate and monthly weather forecastSwansea, SC
Climate and monthly weather forecast
Weather in January
January, the same as December, is a cool winter month in Swansea, South Carolina, with temperature in the range of an average low of 38.1°F (3.4°C) and an average high of 53.2°F (11.8°C). January, known for its average high temperature of 53.2°F (11.8°C) and an average low temperature of 38.1°F (3.4°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Swansea, is a mild month, with temperature in the range of an average high of 57.7°F (14.3°C) and an average low of 41.5°F (5.3°C). February's onset records an average high-temperature of a mild 57.7°F (14.3°C), a near match to January's 53.2°F (11.8°C). Weather in February »Weather in March
The first month of the spring, March, is a comfortable month in Swansea, South Carolina, with an average temperature varying between 47.3°F (8.5°C) and 64.4°F (18°C). The start of March is characterized by a subtle increase in the average high-temperature, transitioning from a moderate 57.7°F (14.3°C) in February to a still refreshing 64.4°F (18°C). Weather in March »Weather in April
April is a warm spring month in Swansea, South Carolina, with an average temperature fluctuating between 55.4°F (13°C) and 73.8°F (23.2°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's refreshing 64.4°F (18°C) to a warm 73.8°F (23.2°C). Weather in April »Weather in May
The last month of the spring, May, is another warm month in Swansea, South Carolina, with an average temperature varying between 63.1°F (17.3°C) and 81.1°F (27.3°C). The start of May is characterized by a subtle increase in the average high-temperature, transitioning from 73.8°F (23.2°C) in April to a still moderately hot 81.1°F (27.3°C). Weather in May »Weather in June
The first month of the summer, June, is a hot month in Swansea, South Carolina, with an average temperature ranging between min 70.3°F (21.3°C) and max 87.6°F (30.9°C). June's onset witnesses a minor shift in the average high-temperature, moving from a moderately hot 81.1°F (27.3°C) in May to a tropical 87.6°F (30.9°C). Weather in June »Weather in July
July, the same as June, in Swansea, South Carolina, is a hot summer month, with temperature in the range of an average low of 73°F (22.8°C) and an average high of 91°F (32.8°C). Swansea's temperatures tend to reach their peak averages in July, with a high of 91°F (32.8°C) and a low of 73°F (22.8°C). During July, the heat index is estimated at a scorching 109.4°F (43°C). Weather in July »Weather in August
August, the last month of the summer in Swansea, is also a hot month, with an average temperature ranging between min 72.1°F (22.3°C) and max 89.2°F (31.8°C). Swansea marks the start of August with an average high-temperature of a still hot 89.2°F (31.8°C), hinting at a slight fluctuation from July's 91°F (32.8°C). Weather in August »Weather in September
September, the first month of the autumn in Swansea, is still a warm month, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 67.1°F (19.5°C). Swansea marks the onset of September with an average high-temperature of a moderately hot 84.2°F (29°C), subtly divergent from August's 89.2°F (31.8°C). Weather in September »Weather in October
October, the same as September, is another warm autumn month in Swansea, South Carolina, with temperature in the range of an average high of 73.8°F (23.2°C) and an average low of 57°F (13.9°C). The arrival of October corresponds with a reduction in the average high-temperature, down from September's moderately hot 84.2°F (29°C) to a still warm 73.8°F (23.2°C). Weather in October »Weather in November
November, the last month of the autumn in Swansea, is also an enjoyable month, with an average temperature varying between 62.6°F (17°C) and 46.4°F (8°C). The transition into November is accompanied by a temperature decrease, with the average high-temperature shifting from a moderately hot 73.8°F (23.2°C) in October to a refreshing 62.6°F (17°C). Weather in November »Weather in December
The first month of the winter, December, is still a mild month in Swansea, South Carolina, with an average temperature ranging between min 42.4°F (5.8°C) and max 57°F (13.9°C). December signifies a minor drop in average high-temperature, transitioning from an enjoyable 62.6°F (17°C) in November to a mild 57°F (13.9°C). Weather in December »Updated: Feb 13, 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
January is the coldest month of the year in Swansea, South Carolina, registering average temperatures as high as 53.2°F (11.8°C) and as low as 38.1°F (3.4°C).
The months with the lowest humidity in Swansea are January and November, with an average relative humidity of 70%.
In Swansea, during the entire year, the rain falls for 166.8 days and collects up to 32.56" (827mm) of precipitation.
Months with snowfall in Swansea are January through March and December.
The months with the most snowfall are January and February, with an average 0.31" (8mm) of accumulated snow.
In Swansea, during the entire year, snow falls for 1.6 days and aggregates up to 0.83" (21mm) of snow.
The months with the lowest UV index in Swansea are January, February and December, with an average maximum UV index of 3.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Swansea, 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 through November are months without snowfall in Swansea, South Carolina.
The month with the longest days in Swansea is June, with an average of 14h and 24min of daylight.
June and July, with an average maximum UV index of 7, are months with the highest UV index in Swansea.
In Swansea, South Carolina, the average highest temperatures are observed in July, with a high of 91°F (32.8°C) and a low of 73°F (22.8°C).
With an average of 10.9h of sunshine, July has the most sunshine of the year.
September and November are months with the least rain in Swansea when the rain falls for 14.3 days and typically aggregates up to 2.01" (51mm) of rain.
The most humid month in Swansea is December, with an average relative humidity of 75%.
December is the month with the most rainfall in Swansea. Rain falls for 11.9 days and accumulates 3.86" (98mm) of precipitation.
The month with the shortest days in Swansea is December, with an average of 10h and 0min of daylight.
With an average of 5.5h of sunshine, December has the least sunshine of the year in Swansea.
Average temperature
Swansea, SC
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (53.2°F).
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.1°F).
Average pressure
Swansea, SC
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.09"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.97"Hg
- Average pressure in July:
29.99"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.01"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed
Swansea, SC
- Average wind speed in January:
8.1mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.5mph - Average wind speed in May:
7.2mph - Average wind speed in June:
6.3mph
- Average wind speed in July:
6.2mph - Average wind speed in August:
5.6mph - Average wind speed in September:
6.2mph - Average wind speed in October:
7mph - Average wind speed in November:
7.1mph - Average wind speed in December:
7.5mph
The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity
Swansea, SC
The month with the highest relative humidity is December (75%).
The months with the lowest relative humidity are January and November (70%).
Average rainfall
Swansea, SC
- Average rainfall in January:
2.24" - Average rainfall in February:
2.72" - Average rainfall in March:
2.4" - Average rainfall in April:
3.35" - Average rainfall in May:
3.03" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.72" - Average rainfall in August:
3.03" - Average rainfall in September:
2.01" - Average rainfall in October:
2.44" - Average rainfall in November:
2.01" - Average rainfall in December:
3.86"
The wettest month (with the highest rainfall) is December (3.86").
The driest months (with the least rainfall) are September and November (2.01").
Average rainfall days
Swansea, SC
- Average rainfall days in January:
11.5 days - Average rainfall days in February:
12.3 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
14.1 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
16.6 days
- Average rainfall days in July:
19.9 days - Average rainfall days in August:
18.3 days - Average rainfall days in September:
14.3 days - Average rainfall days in October:
9 days - Average rainfall days in November:
9 days - Average rainfall days in December:
11.9 days
The month with the highest number of rainy days is July (19.9 days).
The months with the least rainy days are October and November (9 days).
Average snowfall
Swansea, SC
The months with the highest snowfall are January and February (0.31").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days
Swansea, SC
- Average snowfall days in January:
0.7 days - Average snowfall days in February:
0.6 days - Average snowfall days in March:
0.2 days - Average snowfall days in April:
0 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 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.1 days
The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Swansea, SC
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
5h and 42min - Average sunshine in February:
6h and 42min - Average sunshine in March:
7h and 30min - Average sunshine in April:
9h and 18min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 48min
- Average sunshine in July:
10h and 54min - Average sunshine in August:
10h and 24min - Average sunshine in September:
8h and 42min - Average sunshine in October:
6h and 48min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days
Swansea, SC
- Average sunshine days in January:
17.7 days - Average sunshine days in February:
14.3 days - Average sunshine days in March:
14.8 days - Average sunshine days in April:
14.8 days - Average sunshine days in May:
13.4 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
8.4 days - Average sunshine days in August:
9.8 days - Average sunshine days in September:
14 days - Average sunshine days in October:
20.5 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
17.3 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (8.4 days).
Average UV index
Swansea, SC
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover
Swansea, SC
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 28).
Average visibility
Swansea, SC
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).
