Weather in San Diego County, United States in May

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Visiting San Diego County, United States in May

The weather in May is marginally warmer than the previous month and temperatures continue to rise slightly into June. May has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 63.3% making it sunny but overcast at times. The hours of sunshine per day are 8.7hrs making the days long and bright. It is a good time for sunbathing in San Diego County.

May has total rainfall of 0.6cm (0.2inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

Sea temperatures are a cold 16°C (62°F). May is too cold for swimming in San Diego County for any length of time, unless you have a wetsuit. The sea temperature in May is marginally warmer than the previous month and temperatures continue to rise slightly into June.

Consider visiting San Diego County in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for May.

Can you sunbathe in San Diego County in May?

Yes, May is a good time for sunbathing in San Diego County.

May has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 63.3% making it sunny but overcast at times. The hours of sunshine per day are 8.7hrs making the days long and bright. May has total rainfall of 0.6cm (0.2inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between.

More about May temperature and sunshine.

Can you swim in San Diego County in May?

No, May is too cold for swimming in San Diego County for any length of time, with the sea water at 16°C (62°F), unless you have a wetsuit.

More about May sea temperatures.

Is May a good time to holiday in San Diego County?

Yes, May is a good time for a holiday in San Diego County.

May has average maximum temperatures of 22°C (71°F) which is nice and warm and makes sunbathing pleasant on clear days. The sunshine percentage is 63.3% making it sunny but overcast at times. The hours of sunshine per day are 8.7hrs making the days long and bright. May has total rainfall of 0.6cm (0.2inches) making it extremely dry with very few light showers and most days are rain free. There are just 3.2 days with some rainfall so you can still enjoy the beach on the majority of rain free clear days and rainy days are few and far between. It is a good time for sunbathing in San Diego County. Sea temperatures are a cold 16°C (62°F). May is too cold for swimming in San Diego County for any length of time, unless you have a wetsuit.

More about the May temperatures and sunshine.

Is San Diego County warm in May?

Yes, San Diego County is nice and warm and makes sunbathing pleasant on clear days in May.

The average maximum temperature in San Diego County in May is 22°C (71°F). The average maximum temperature is 20°C (68°) in the previous month and 22°C (72°F) in the next month.

The average temperature in San Diego County in May is 17°C (63°F). The average temperature is 15°C (59°F) in the previous month and 19°C (65°F) in the next month.

More info about the May temperatures and sunshine.

How sunny is San Diego County in May?

The average day light hours per day in San Diego County in May are 13.9. The sunshine percentage is 63.3% making it sunny but overcast at times. The hours of sunshine per day are 8.7hrs making the days long and bright.

More about May sunshine.

Temperature in San Diego County in May

The weather in May is marginally warmer than the previous month and temperatures continue to rise slightly into June. The average maximum temperature in San Diego County in May is 22°C (71°F). The average maximum temperature is 20°C (68°F) in the previous month and 22°C (72°F) in the next month.

The average temperature in San Diego County in May is 17°C (63°F). The average temperature is 15°C (59°F) in the previous month and 19°C (65°F) in the next month.

The average minimum temperature in San Diego County in May is 14°C (57°F). The minimum temperature is 11°C (51°F) in the previous month and 15°C (60°F) in the next month.

Sunshine in San Diego County in May

The days in May are longer than the previous month and the days continue to get marginally longer into June. May has a slightly more hours of sunshine than the previous month. During May the average day light hours are 13.9 per day in San Diego County. The sunshine percentage is 63.3% making it sunny but overcast at times. The hours of sunshine per day are 8.7hrs making the days long and bright.

The ultraviolet index in San Diego County in May is typically 11 during May. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in San Diego County in May

The average sea water temperature in San Diego County in May is 16.4°C (61.5°F) which is cool for swimming, shorty wetsuit may help you extend your time in the water. The sea temperature in May is marginally warmer than the previous month and temperatures continue to rise slightly into June.

Rainfall in San Diego County in May

May weather is drier than the previous month and rainfall continues to drop slightly into June. May has fewer days of rain than the previous month and rainy days continue to drop slightly into June. The average total rainfall in San Diego County in May is 0.6cm (0.2inches) and on average there are 3.2 rainy days in May making it a very dry time to visit the beach.

Humidity in San Diego County in May

The maximum dew point (an indicator of humidity) in San Diego County in May is 13°C (55°F) which is very comfortable. The dew point is 11°C (52°F) in the previous month and 15°C (15°F) in the next month.

The average maximum relative humidity in San Diego County in May is typically 85%. The maximum relative humidity is 86.8% in the previous month and 87% in the next month.

The average relative humidity in San Diego County in May is typically 70.4%. The average relative humidity is 69.5% in the previous month and 74.4% in the next month.

Wind Speed in San Diego County in May

The average maximum wind speed in San Diego County in May is typically 20KM/H (12MPH). The average maximum wind speed is 21KM/H (13MPH) in the previous month and 19KM/H (12MPH) in the next month.

The average wind speed in San Diego County in May is typically 8KM/H (5MPH). The average wind speed is 8KM/H (5MPH) in the previous month and 7KM/H (4MPH) in the next month.

The average wind direction in San Diego County in May is from the West-Southwest.

Monthly Averages

Suggested Beaches in May

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.