August weather forecastSwansea, CA
August
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).Temperature
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). An average minimum temperature of 67.6°F (19.8°C) is recorded during the month of August.Humidity
August is the least humid month, with an average relative humidity of 19%.Rainfall
In August, the rain falls for 2.6 days. Throughout August, 0.24" (6mm) of precipitation is accumulated. Throughout the year, there are 48 rainfall days, and 4.92" (125mm) of precipitation is accumulated.Snowfall
In Swansea, California, snow does not fall in May through October.Daylight
In Swansea, the average length of the day in August is 13h and 31min.On the first day of August, sunrise is at 5:58 am and sunset at 7:57 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:20 pm PDT.
Sunshine
In Swansea, the average sunshine in August is 12h.UV index
In Swansea, the average daily maximum UV index in August is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In August, an average UV index of 6 transforms into the following instructions:
Guard against overexposure. Protection from sun-induced harm is essential. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Swansea, CA
- Average high temperature in August: 85.5°F
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).
- Average low temperature in August: 67.6°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 in August
Swansea, CA
- Average pressure in August: 29.88"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 in August
Swansea, CA
- Average wind speed in August: 6.3mph
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 in August
Swansea, CA
- Average humidity in August: 19%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (19%).
Average rainfall in August
Swansea, CA
- Average rainfall in August: 0.24"
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 in August
Swansea, CA
- Average rainfall days in August: 2.6 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 in August
Swansea, CA
- Average snowfall in August: 0"
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 in August
Swansea, CA
- Average snowfall days in August: 0 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 in August /
Average sunshine in August
Swansea, CA
- Average daylight in August: 13h and 30min
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 August: 12h and 0min
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 in August
Swansea, CA
- Average sunshine days in August: 23.3 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 in August
Swansea, CA
- Average UV index in August: 6
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 in August
Swansea, CA
- Average cloud cover in August: 5
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 in August
Swansea, CA
- Average visibility in August: 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).





