Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
With the onset of May, Swansea experiences a subtle temperature shift, with the average high-temperature moving from an enjoyable 61.7°F (16.5°C) in April to an agreeable 68.9°F (20.5°C). In Swansea, May nights cool down to an average of 52.3°F (11.3°C).Humidity
In May, the average relative humidity in Swansea is 25%.Rainfall
In Swansea, California, in May, it is raining for 4.7 days, with typically 0.35" (9mm) of accumulated precipitation. Throughout the year, there are 48 rainfall days, and 4.92" (125mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in May is 14h and 8min.On the first day of the month, sunrise is at 5:57 am and sunset at 7:40 pm. On the last day of May, sunrise is at 5:34 am and sunset at 8:04 pm PDT.
Sunshine
In May, the average sunshine in Swansea, California, is 11.9h.UV index
In May, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In May, a daily UV index of 5 turns into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
What is the usual temperature for Swansea in May?
What is the average humidity in May in Swansea?
How much does it rain in Swansea in May?
When it does not snow in Swansea?
Does it snow in Swansea in May?
What is the average length of the day in May in Swansea?
When is the sunrise / sunset in May in Swansea?
How many hours of sunshine does Swansea have in May?
What is the UV index intensity in May in Swansea?
Average temperature in May
Swansea, CA
- Average high temperature in May: 68.9°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 May: 52.3°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 May
Swansea, CA
- Average pressure in May: 29.87"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 May
Swansea, CA
- Average wind speed in May: 7.6mph
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 May
Swansea, CA
- Average humidity in May: 25%
The month with the highest relative humidity is December (47%).
The month with the lowest relative humidity is August (19%).
Average rainfall in May
Swansea, CA
- Average rainfall in May: 0.35"
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 May
Swansea, CA
- Average rainfall days in May: 4.7 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 May
Swansea, CA
- Average snowfall in May: 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 May
Swansea, CA
- Average snowfall days in May: 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 May /
Average sunshine in May
Swansea, CA
- Average daylight in May: 14h and 1min
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 May: 11h and 5min
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 May
Swansea, CA
- Average sunshine days in May: 21.8 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 May
Swansea, CA
- Average UV index in May: 5
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 May
Swansea, CA
- Average cloud cover in May: 10
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 May
Swansea, CA
- Average visibility in May: 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).
Swansea, California, USA
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