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 sea temperature 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
Rio del Mar's weather in May, with an average high-temperature of a still comfortable 64.9°F (18.3°C), subtly shifts from April's 63.1°F (17.3°C). Throughout the month of May, Rio del Mar observes an average nighttime temperature of 49.1°F (9.5°C).Humidity
The average relative humidity in May is 74%.Rainfall
In Rio del Mar, in May, it is raining for 6.5 days, with typically 0.67" (17mm) of accumulated precipitation. Throughout the year, there are 77.9 rainfall days, and 14.45" (367mm) of precipitation is accumulated.Ocean temperature
In May, the average ocean temperature in Rio del Mar is 54.1°F (12.3°C).Note: Unprotected swimming in 54.1°F (12.3°C) is dangerous due to potential cold shock. Especially when temperatures go below 50°F (10°C), leading to hyperventilation.
Daylight
In Rio del Mar, California, the average length of the day in May is 14h and 10min.On the first day of May, sunrise is at 6:12 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:21 pm PDT.
Sunshine
In Rio del Mar, the average sunshine in May is 10.3h.UV index
The average daily maximum UV index in May in Rio del Mar is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Rio del Mar?
What is the average humidity in May in Rio del Mar?
How much does it rain in Rio del Mar in May?
How cold is the water in May in Rio del Mar?
How many hours of daylight does Rio del Mar have in May?
When are sunrise and sunset in May in Rio del Mar?
How many hours of sunshine does Rio del Mar have in May?
What is the UV index reading in May in Rio del Mar?
Average temperature in May
Rio del Mar, CA
- Average high temperature in May: 64.9°F
The warmest months (with the highest average high temperature) are August and September (73°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in May: 49.1°F
The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is February (45.5°F).
Average pressure in May
Rio del Mar, CA
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is September (29.92"Hg).
Average wind speed in May
Rio del Mar, CA
- Average wind speed in May: 7.2mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in May
Rio del Mar, CA
- Average humidity in May: 74%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Rio del Mar, CA
- Average rainfall in May: 0.67"
The wettest month (with the highest rainfall) is December (2.8").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in May
Rio del Mar, CA
- Average rainfall days in May: 6.5 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.2 days).
Average sea temperature in May
Rio del Mar, CA
- Average sea temperature in May: 54.2°F
The best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).
Average daylight in May /
Average sunshine in May
Rio del Mar, CA
- Average daylight in May: 14h and 1min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in May: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in May
Rio del Mar, CA
- Average sunshine days in May: 22.1 days
The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.4 days).
Average UV index in May
Rio del Mar, CA
- Average UV index in May: 4
The months with the highest UV index are June, July, August and September (UV index 5).
The months with the lowest UV index are February and November (UV index 3).
Average cloud cover in May
Rio del Mar, CA
- Average cloud cover in May: 30
The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are July and September (Cloud cover 15).
Average visibility in May
Rio del Mar, 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).
Rio del Mar, California, USA
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