Expand
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, in Swansea, California, is another chilly winter month, with an average temperature varying between 33.1°F (0.6°C) and 48.4°F (9.1°C). Swansea's weather, upon January's arrival, documents an average high-temperature of a still frosty 48.4°F (9.1°C), nearly identical to the prior month. Weather in January »
Weather in February
February, the last month of the winter in Swansea, is another chilly month, with an average temperature varying between 49.6°F (9.8°C) and 34.2°F (1.2°C). Swansea's shift into February sets the average high-temperature at a still chilly 49.6°F (9.8°C), a figure that deviates only slightly from January's 48.4°F (9.1°C). Weather in February »
Weather in March
The first month of the spring, March, is a cool month in Swansea, California, with an average temperature ranging between min 38.5°F (3.6°C) and max 54.9°F (12.7°C). The shift into March uncovers an average high-temperature of a cool 54.9°F (12.7°C), subtly different from the previous month. Weather in March »
Weather in April
April is a refreshing spring month in Swansea, California, with temperature in the range of an average low of 44.2°F (6.8°C) and an average high of 61.7°F (16.5°C). The arrival of April brings a soft temperature shift, with the average high-temperature nudging from a cool 54.9°F (12.7°C) in March to a comfortable 61.7°F (16.5°C). Weather in April »
Weather in May
May, the last month of the spring in Swansea, is an agreeable month, with an average temperature fluctuating between 52.3°F (11.3°C) and 68.9°F (20.5°C). A gentle upsurge in temperatures occurs as April gives way to May, with average highs shifting from a refreshing 61.7°F (16.5°C) to a pleasant 68.9°F (20.5°C). Weather in May »
Weather in June
June, the first month of the summer in Swansea, is a moderately hot month, with an average temperature varying between 62.6°F (17°C) and 81°F (27.2°C). The rise of average high-temperatures is seen in June, with an increase from a pleasant 68.9°F (20.5°C) in May to a warm 81°F (27.2°C). Weather in June »
Weather in July
July is a hot summer month in Swansea, California, with an average temperature ranging between max 86°F (30°C) and min 69.1°F (20.6°C). In Swansea, the month of July is known for its highest average temperatures, reaching a high of 86°F (30°C) and a low of 69.1°F (20.6°C). Weather in July »
Weather in August
August, the last month of the summer in Swansea, is also a moderately hot month, with an average temperature fluctuating between 85.5°F (29.7°C) and 67.6°F (19.8°C). As Swansea welcomes August, the average high-temperature stabilizes at a moderately hot 85.5°F (29.7°C), showing little deviation from July's 86°F (30°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Swansea, California, with an average temperature fluctuating between 78.1°F (25.6°C) and 60.3°F (15.7°C). The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's moderately hot 85.5°F (29.7°C) to a still warm 78.1°F (25.6°C). Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Swansea, California, with an average temperature fluctuating between 67.1°F (19.5°C) and 49.6°F (9.8°C). Swansea's progression into October involves a drop in the average high-temperature, receding from a moderately hot 78.1°F (25.6°C) in September to a comfortable 67.1°F (19.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Swansea, is another mild month, with an average temperature varying between 39.2°F (4°C) and 56.3°F (13.5°C). As November arrives, Swansea's weather displays a decrease in high-temperatures, transitioning from October's 67.1°F (19.5°C) to a still refreshing 56.3°F (13.5°C). Weather in November »
Weather in December
The first month of the winter, December, is still a chilly month in Swansea, California, with temperature in the range of an average low of 31.5°F (-0.3°C) and an average high of 46.9°F (8.3°C). In Swansea, the month of December is known for its lowest average temperatures, reaching a high of 46.9°F (8.3°C) and a low of 31.5°F (-0.3°C). Weather in December »
Updated: Aug 17, 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
How much does it rain?
In Swansea, during the entire year, the rain falls for 48 days and collects up to 4.92" (125mm) of precipitation.
When does it snow?
January through April, November and December are months with snowfall in Swansea.
How many days does it snow?
In Swansea, during the entire year, snow falls for 4.5 days and aggregates up to 3.07" (78mm) of snow.
What is the month with the least sunshine?
January, February and December, with an average of 7.3h of sunshine, are months with the least sunshine in Swansea, California.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Swansea, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
When it does not snow?
May through October are months without snowfall.
What is the driest month?
June and September are months with the least rain when the rain falls for 2.7 days and typically aggregates up to 0.16" (4mm) of rain.
When are the longest days in Swansea?
The month with the longest days is June, with an average of 14h and 36min of daylight.
What month has the most sunshine?
With an average of 12.2h of sunshine, June has the most sunshine of the year.
What month is the hottest?
July brings the highest temperatures in Swansea, with an average high of 86°F (30°C) and an average low of 69.1°F (20.6°C).
What is the month with the highest UV index?
The month with the highest UV index is July, with an average maximum UV index of 7.
What is the least humid month?
August is the least humid month, with an average relative humidity of 19%.
What is the month with the lowest UV index?
The months with the lowest UV index are November and December, with an average maximum UV index of 2.
What part of the year is the coldest?
December brings the lowest temperatures, with an average high of 46.9°F (8.3°C) and an average low of 31.5°F (-0.3°C).
What is the most humid month?
The most humid month in Swansea is December, with an average relative humidity of 47%.
What is the wettest month?
The month with the most rainfall is December, when the rain falls for 5.1 days and typically aggregates up to 0.67" (17mm) of precipitation.
What is the snowiest month?
December is the month with the most snowfall. Snow falls for 1.2 days and accumulates 1.18" (30mm) of snow.
What is the month with the shortest days?
With an average of 9h and 42min of daylight, December has the shortest days of the year.
Average temperature
Swansea, CA
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (46.9°F).
The month with the highest average low temperature is July (69.1°F).
The coldest month (with the lowest average low temperature) is December (31.5°F).
Average pressure
Swansea, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.87"Hg - Average pressure in June:
29.83"Hg
- Average pressure in July:
29.88"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.89"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30.06"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed
Swansea, CA
- Average wind speed in January:
5.9mph - Average wind speed in February:
6.6mph - Average wind speed in March:
7.2mph - Average wind speed in April:
7.6mph - Average wind speed in May:
7.6mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.3mph - Average wind speed in September:
6.2mph - Average wind speed in October:
6.4mph - Average wind speed in November:
5.8mph - Average wind speed in December:
6.2mph
The windiest months (with the highest average wind speed) are April, May and June (7.6mph).
The calmest month (with the lowest average wind speed) is November (5.8mph).
Average humidity
Swansea, CA
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (19%).
Average rainfall
Swansea, CA
- Average rainfall in January:
0.63" - Average rainfall in February:
0.59" - Average rainfall in March:
0.59" - Average rainfall in April:
0.51" - Average rainfall in May:
0.35" - Average rainfall in June:
0.16"
- Average rainfall in July:
0.43" - Average rainfall in August:
0.24" - Average rainfall in September:
0.16" - Average rainfall in October:
0.24" - Average rainfall in November:
0.35" - Average rainfall in December:
0.67"
The wettest month (with the highest rainfall) is December (0.67").
The driest months (with the least rainfall) are June and September (0.16").
Average rainfall days
Swansea, CA
- Average rainfall days in January:
5.1 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
5.7 days - Average rainfall days in April:
5.3 days - Average rainfall days in May:
4.7 days - Average rainfall days in June:
2.7 days
- Average rainfall days in July:
4.8 days - Average rainfall days in August:
2.6 days - Average rainfall days in September:
2.3 days - Average rainfall days in October:
2.7 days - Average rainfall days in November:
2.5 days - Average rainfall days in December:
5.1 days
The month with the highest number of rainy days is March (5.7 days).
The month with the least rainy days is September (2.3 days).
Average snowfall
Swansea, CA
The month with the highest snowfall is December (1.18").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days
Swansea, CA
- Average snowfall days in January:
1 days - Average snowfall days in February:
1.1 days - Average snowfall days in March:
0.3 days - Average snowfall days in April:
0.4 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:
0.5 days - Average snowfall days in December:
1.2 days
The month with the highest number of snowfall days is December (1.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight / Average sunshine
Swansea, CA
- Average daylight in January:
10h and 0min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
7h and 2min - Average sunshine in February:
7h and 2min - Average sunshine in March:
9h and 2min - Average sunshine in April:
11h and 3min - Average sunshine in May:
11h and 5min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 5min - Average sunshine in October:
8h and 4min - Average sunshine in November:
7h and 2min - Average sunshine in December:
7h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The months with the least sunshine are January, February and December (Average sunshine: 7h and 18min).
Average sunshine days
Swansea, CA
- Average sunshine days in January:
23.5 days - Average sunshine days in February:
22.3 days - Average sunshine days in March:
24.3 days - Average sunshine days in April:
22 days - Average sunshine days in May:
21.8 days - Average sunshine days in June:
24.7 days
- Average sunshine days in July:
20 days - Average sunshine days in August:
23.3 days - Average sunshine days in September:
25 days - Average sunshine days in October:
27.7 days - Average sunshine days in November:
26.3 days - Average sunshine days in December:
25.3 days
The month with the most sunshine days is October (27.7 days).
The month with the least sunshine days is July (20 days).
Average UV index
Swansea, CA
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are November and December (UV index 2).
Average cloud cover
Swansea, CA
The month with the most cloud cover is January (Cloud cover 16).
The months with the least cloud cover are August and September (Cloud cover 5).
Average visibility
Swansea, CA
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).
Swansea, California, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location