Temperatures in May
It's pleasantly warm in May in San Diego with an average temperature of 21°C. Temperatures this month range from a low of 20°C to a high of 22°C. At night, you can expect temperatures between 14°C and 17°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for San Diego in May. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of May
The month of May starts in San Diego with mild temperatures, averaging around 21°C during the day and nights close to 16°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-May
By mid-May, the average daytime temperature rises to around 22°C, with nights close to 17°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.
End of May
By the end of May, the average daytime temperature in San Diego will be around 21°C, with nights close to 17°C. No precipitation expected, with plenty of sunshine on the horizon. A shirt, maybe a light cardigan, and light trousers will do.
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Water temperature
The water temperature at San Diego is 19°C this month. Refreshing if you fancy a swim.
Precipitation in May
In May, there is an average of 12 mm of precipitation, spread over 2 days. The wind speed is around 4 Bft, mostly coming from the West.
The average chance of precipitation is only 7% in May.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in May for San Diego. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
San Diego in May |
London | ||
|---|---|---|---|
 Average Temperature |
21°C | 18°C | |
 High Temp |
22°C | 21°C | |
| Low Temp |
20°C | 15°C | |
 Total Precipitation |
12 mm | 46 mm | |
| Rainy Days |
2 days | 8 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit San Diego?
Want nice weather? Then May is a great time to be in San Diego. You’ll have pleasant temperatures and little chance of rain this month.
Temperature records for San Diego in May
With 36°C, San Diego hit the highest temperature in the last 10 years in May 2014. The lowest daytime temperature in this month was 14°C in 2017. The extreme night temperatures ranged from a low of 5°C to a high of 21°C.
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Daily Temperature in May in San Diego
This chart shows the average daily temperatures, both day and night, for each day in May in San Diego, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in May in San Diego
The chart below shows the average daily precipitation in May for San Diego, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for May, you can expect around 2 days of rain in San Diego.
Daily UV Index in May in San Diego
This chart shows the average daily UV index in May in San Diego, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in San Diego Over the Years
This chart shows the average temperature in May in San Diego, measured in degrees Celsius, over the past years.
Total Precipitation in May in San Diego Over the Years
This chart shows the average precipitation in May in San Diego, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in May for San Diego
Click on a specific day in May for detailed info on the typical weather on that day in San Diego. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in San Diego
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Average Weather in San Diego by Month
Click on a month below to see detailed weather info for San Diego. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of San Diego for all months at once
